*{box-sizing:border-box}body{margin:0;font-family:Tahoma,Arial,sans-serif;background:#f7f8fc;color:#202232}a{text-decoration:none;color:inherit}main{min-height:70vh}.topbar{height:78px;padding:0 5%;display:flex;align-items:center;justify-content:space-between;background:white;border-bottom:1px solid #ececf3;position:sticky;top:0;z-index:20}.brand{display:flex;gap:12px;align-items:center}.brand img,.logo-note{width:48px;height:48px;border-radius:14px;object-fit:contain}.logo-note{background:var(--primary);color:#fff;display:grid;place-items:center;font-size:28px}.brand strong{display:block}.brand small{color:#777}.topbar nav{display:flex;align-items:center;gap:18px}.btn{display:inline-block;background:var(--primary);color:#fff;border:0;border-radius:12px;padding:12px 20px;font-weight:700;cursor:pointer}.btn.ghost{background:#fff;color:var(--primary);border:1px solid var(--primary)}.btn.full{display:block;width:100%;text-align:center;margin-top:10px}.btn.mini{padding:9px 14px}.hero{padding:70px 7%;display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center;background:linear-gradient(135deg,#fff,#f0edff)}.hero h1{font-size:48px;line-height:1.2;margin:14px 0}.hero p{font-size:19px;line-height:1.9;color:#5b6070}.badge{display:inline-block;padding:7px 12px;border-radius:999px;background:#ece8ff;color:var(--primary);font-weight:700;font-size:13px}.hero-card{background:#fff;padding:34px;border-radius:28px;box-shadow:0 20px 60px #4a35a51a}.notes{font-size:56px;color:var(--primary);letter-spacing:9px}.actions{display:flex;gap:10px;margin-top:25px}.section{padding:45px 7%}.section.soft{background:#fff}.grid{display:grid;gap:20px}.grid.four{grid-template-columns:repeat(4,1fr)}.grid.three{grid-template-columns:repeat(3,1fr)}.grade-card,.panel,.feature,.resource-card,.stat{background:#fff;border:1px solid #ececf4;border-radius:18px;padding:24px}.grade-card{text-align:center;transition:.2s}.grade-card:hover{transform:translateY(-4px);box-shadow:0 14px 30px #00000010}.grade-card strong{display:block;font-size:52px;color:var(--primary)}.grade-card span,.grade-card small{display:block;color:#777}.page-head{padding:45px 7% 25px;background:#fff}.page-head h1{margin:8px 0;font-size:36px}.lesson-list{display:flex;flex-direction:column;gap:12px}.lesson-row{display:grid;grid-template-columns:58px 1fr auto;align-items:center;gap:18px;background:#fff;border:1px solid #ececf3;padding:18px;border-radius:16px}.num{width:52px;height:52px;border-radius:14px;background:var(--primary);color:#fff;display:grid;place-items:center;font-weight:bold;font-size:20px}.lesson-row h3{margin:0 0 6px}.lesson-row p{margin:0;color:#777}.duration{color:#666}.lesson-layout{display:grid;grid-template-columns:1fr 280px;gap:24px}.lesson-image{width:100%;max-height:440px;object-fit:cover;border-radius:18px}.video{position:relative;padding-top:56.25%;border-radius:18px;overflow:hidden;margin:18px 0;background:#000}.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.video.small{margin:8px 0}.audio-box{display:flex;align-items:center;gap:14px;background:#fff;border:1px solid #eee;padding:16px;border-radius:14px}.audio-box audio,.resource-card audio{width:100%}.lesson-block{display:grid;grid-template-columns:56px 1fr;gap:15px;background:#fff;margin:14px 0;padding:20px;border-radius:16px;border:1px solid #ececf3}.block-icon{font-size:30px}.lesson-block h3{margin:0}.lesson-block h3 small{font-size:12px;background:#f0f0f5;padding:5px 8px;border-radius:20px;color:#777}.lesson-block p{line-height:1.9}.big-time{font-size:34px;color:var(--primary);font-weight:bold}.resource-card img{width:100%;border-radius:12px;margin-top:10px}.auth-wrap{min-height:70vh;display:grid;place-items:center;padding:40px}.auth-card{width:min(430px,100%);background:#fff;padding:30px;border-radius:20px;border:1px solid #eee}.auth-card label,.form-grid label{font-weight:700;display:block}.auth-card input,.form-grid input,.form-grid select,.form-grid textarea{width:100%;margin-top:7px;margin-bottom:14px;padding:12px;border:1px solid #dcddea;border-radius:10px;font:inherit;background:#fff}.alert,.notice{padding:13px;border-radius:10px;margin-bottom:14px}.alert{background:#ffe9e9;color:#9d2222}.notice{background:#e8fff1;color:#157044}.hint{font-size:12px;color:#777}.admin-shell{display:grid;grid-template-columns:240px 1fr;min-height:75vh}.admin-nav{background:#171927;color:#fff;padding:25px 18px}.admin-nav h3{margin-top:0}.admin-nav a{display:block;padding:12px;border-radius:10px;margin:5px 0}.admin-nav a:hover{background:#ffffff12}.admin-content{padding:30px;overflow:auto}.admin-title{display:flex;align-items:center;justify-content:space-between}.stat{text-align:center}.stat b{display:block;font-size:38px;color:var(--primary)}.stat span{color:#777}.table-wrap{overflow:auto;background:#fff;border-radius:14px;border:1px solid #eee;margin-top:20px}table{width:100%;border-collapse:collapse}th,td{padding:13px;border-bottom:1px solid #eee;text-align:right;white-space:nowrap}.inline{display:inline}.link-btn,.danger-link{border:0;background:none;cursor:pointer;font:inherit;font-weight:700;margin-left:8px}.link-btn{color:var(--primary)}.danger-link{color:#d62d2d}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.form-grid .wide{grid-column:1/-1}.check{display:flex!important;gap:10px;align-items:center}.check input{width:auto;margin:0}.checks{display:flex;gap:14px;flex-wrap:wrap;margin-top:10px}.checks label{font-weight:400}.checks input{width:auto;margin:0}.empty{padding:30px;background:#fff;border-radius:16px;color:#777}footer{padding:28px 7%;display:flex;justify-content:space-between;border-top:1px solid #e8e8ef;background:#fff;color:#777}@media(max-width:900px){.hero,.lesson-layout,.admin-shell{grid-template-columns:1fr}.grid.four,.grid.three{grid-template-columns:1fr 1fr}.admin-nav{display:flex;overflow:auto;gap:5px}.admin-nav h3{display:none}.admin-nav a{white-space:nowrap}.topbar nav a:not(.btn){display:none}}@media(max-width:600px){.grid.four,.grid.three,.form-grid{grid-template-columns:1fr}.hero h1{font-size:34px}.hero{padding:45px 6%}.section,.page-head{padding-left:5%;padding-right:5%}.lesson-row{grid-template-columns:48px 1fr}.duration{grid-column:2}.form-grid .wide{grid-column:auto}.brand small{display:none}}
.teacher-jump{display:inline-block;margin-top:12px;padding:10px 14px;border-radius:12px;background:#fff4d8;color:#7a5400;font-weight:700;border:1px solid #f0d58c}
.student-lesson{max-width:1000px;margin:auto}.student-step{display:grid;grid-template-columns:64px 1fr;gap:18px;background:#fff;padding:25px;border-radius:20px;border:1px solid #ececf3;margin-bottom:18px}.step-no{width:56px;height:56px;border-radius:18px;background:var(--primary);color:#fff;display:grid;place-items:center;font-weight:900;font-size:23px}.student-step p{font-size:18px;line-height:2}.practice-box{padding:18px;background:#f7f4ff;border-radius:14px;font-size:18px;line-height:1.9}.exercise-zone{background:#181a2a;color:#fff;padding:28px;border-radius:24px;margin:25px 0}.exercise-card{background:#fff;color:#202232;padding:22px;border-radius:18px;margin:16px 0}.exercise-card audio{width:100%;margin:10px 0}.answer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px;margin-top:15px}.answer-btn{border:2px solid #e1e2eb;background:#fff;border-radius:14px;padding:15px;font:inherit;font-weight:700;cursor:pointer}.answer-btn.ok{background:#e8fff0;border-color:#2fbd66}.answer-btn.bad{background:#fff0f0;border-color:#e14b4b}.exercise-feedback{min-height:28px;margin-top:12px;font-weight:800}.teacher-guide{display:grid;grid-template-columns:1fr 1fr;gap:18px}.guide-card{background:#fff;border:1px solid #ececf3;border-radius:18px;padding:24px}.guide-card p{line-height:1.9}@media(max-width:700px){.teacher-guide{grid-template-columns:1fr}.student-step{grid-template-columns:1fr}}

.student-head{background:linear-gradient(135deg,#fff,#f7f0ff,#eefaff)}
.visual-step{background:linear-gradient(135deg,#fff,#fff9fd)}.visual-step img{box-shadow:0 16px 40px #00000012}
.answer-btn.selected{outline:3px solid var(--primary);background:#f2efff}
.exercise-feedback.good{color:#148d45}.exercise-feedback.retry{color:#c84040}
.written-answer{display:flex;flex-direction:column;gap:10px;margin-top:14px}.student-text-answer{width:100%;border:2px solid #e1e2eb;border-radius:14px;padding:14px;font:inherit;resize:vertical}
.instruments-wrap{display:grid;grid-template-columns:1fr 1fr;gap:24px}.instrument-card{background:#fff;border:1px solid #ececf3;border-radius:24px;padding:26px;box-shadow:0 12px 30px #00000008}
.piano{display:grid;grid-template-columns:repeat(8,1fr);gap:4px;margin-top:20px}.piano button{height:190px;border:1px solid #ccd0da;background:linear-gradient(#fff,#f1f3f7);border-radius:0 0 12px 12px;font-weight:700;font-size:16px;cursor:pointer;box-shadow:inset 0 -8px 12px #00000008}.piano button:active{transform:translateY(3px);background:#ece8ff}
.drums{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:20px}.drums button{min-height:150px;border:0;border-radius:50%;background:radial-gradient(circle at 35% 30%,#fff,#ececff 45%,#c9c4ff);font-size:52px;cursor:pointer;box-shadow:0 14px 25px #0002}.drums button span{display:block;font-size:14px;margin-top:8px}.drums button:active{transform:scale(.96)}
@media(max-width:800px){.instruments-wrap{grid-template-columns:1fr}.piano{overflow-x:auto;grid-template-columns:repeat(8,70px)}.piano button{height:150px}}
/* V5 premium visual system */
body{background:#f4f6fb;color:#171923}.topbar{height:86px;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid #e9ebf2;box-shadow:0 7px 30px #2022320a}.brand strong{font-size:17px}.logo-note{box-shadow:0 10px 24px color-mix(in srgb,var(--primary) 22%,transparent)}.topbar nav a{font-weight:700;color:#4d5262}.topbar nav a:hover{color:var(--primary)}
.premium-hero{min-height:650px;padding:72px 7%;display:grid;grid-template-columns:1.08fr .72fr;gap:60px;align-items:center;background:radial-gradient(circle at 12% 5%,#efeaff 0,transparent 28%),radial-gradient(circle at 86% 90%,#e5f7ff 0,transparent 27%),linear-gradient(135deg,#fbfcff,#f5f2ff)}.hero-copy h1{font-size:55px;line-height:1.18;margin:13px 0 18px;letter-spacing:-1px}.hero-copy>p{font-size:20px;color:#626778;line-height:1.9;max-width:720px}.eyebrow,.login-kicker{display:inline-flex;align-items:center;gap:8px;text-transform:uppercase;letter-spacing:.7px;color:var(--primary);font-size:13px;font-weight:900}.hero-stats{display:flex;gap:12px;margin-top:26px}.hero-stats div{min-width:126px;padding:15px 18px;border-radius:17px;background:#ffffffb8;border:1px solid #e9e7f6;box-shadow:0 10px 28px #27204f09}.hero-stats b{display:block;font-size:26px;color:#1e2030}.hero-stats span{font-size:12px;color:#737888}.btn.premium{background:linear-gradient(135deg,var(--primary),#836bf7);box-shadow:0 12px 28px #5b3df52b;border-radius:14px}.btn.premium:hover{transform:translateY(-1px);box-shadow:0 16px 35px #5b3df53a}
.home-login-wrap{position:relative}.home-login-wrap:before{content:"";position:absolute;inset:-22px;border-radius:38px;background:linear-gradient(145deg,#ffffff8c,#dcd4ff55);filter:blur(0);transform:rotate(2deg)}.home-login-card{position:relative;background:rgba(255,255,255,.97);padding:34px;border-radius:30px;border:1px solid #e7e8f0;box-shadow:0 28px 80px #25203f1b}.login-icon{width:58px;height:58px;border-radius:18px;display:grid;place-items:center;background:linear-gradient(135deg,var(--primary),#9f8bff);color:#fff;font-size:30px;box-shadow:0 12px 28px #5b3df530}.home-login-card h2{font-size:30px;margin:14px 0 5px}.home-login-card>p{color:#747989;line-height:1.7;margin-bottom:22px}.home-login-card label{font-size:13px;font-weight:900;color:#454959;display:block;margin:12px 0 7px}.input-shell{height:53px;border:1.5px solid #dfe2eb;border-radius:14px;display:flex;align-items:center;gap:10px;padding:0 14px;background:#fbfcfe;transition:.2s}.input-shell:focus-within{border-color:var(--primary);box-shadow:0 0 0 4px #5b3df50d;background:#fff}.input-shell input{border:0!important;outline:0;background:transparent!important;margin:0!important;padding:0!important;height:100%;font:inherit}.home-login-card small{display:block;text-align:center;color:#9296a4;margin-top:13px}.logged-card{text-align:center}.logged-card .login-icon{margin:auto}
.premium-section{padding-top:65px;padding-bottom:65px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:28px}.section-heading h2{font-size:35px;margin:6px 0}.section-heading>p{max-width:520px;color:#777d8d;line-height:1.8}.grade-premium-grid{gap:16px}.grade-premium{display:grid;grid-template-columns:70px 1fr auto;align-items:center;gap:15px;padding:19px;background:#fff;border:1px solid #e8eaf0;border-radius:21px;box-shadow:0 10px 26px #18203508;transition:.25s}.grade-premium:hover{transform:translateY(-5px);box-shadow:0 20px 38px #20284013;border-color:#dcd5ff}.grade-orb{width:64px;height:64px;border-radius:20px;background:linear-gradient(145deg,#f2eeff,#e7f5ff);display:grid;place-items:center;font-size:31px;font-weight:900;color:var(--primary)}.grade-premium span,.grade-premium small{color:#8a8f9d;font-size:12px}.grade-premium h3{margin:3px 0;font-size:20px}.grade-premium .arrow{font-size:24px;color:#bbb}
.instrument-preview-section{background:linear-gradient(135deg,#171927,#24283a);color:#fff;padding:70px 7%}.section-heading.light>p{color:#b9bdca}.section-heading.light .eyebrow{color:#b9aaff}.mini-stage{min-height:330px;display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:45px;padding:35px 6%;border-radius:32px;background:radial-gradient(circle at 50% 0,#ffffff12,transparent 45%),#11131e;border:1px solid #ffffff12;box-shadow:inset 0 0 70px #0005;margin-bottom:25px}.mini-piano-art{height:205px;background:linear-gradient(#23242a,#090a0d);border-radius:20px;padding:25px 25px 18px;box-shadow:0 20px 40px #0008,inset 0 1px #ffffff1a}.fallboard{text-align:center;font-size:11px;letter-spacing:4px;color:#d1b36a;height:45px}.mini-keys{height:110px;display:grid;grid-template-columns:repeat(10,1fr);gap:2px}.mini-keys i{display:block;background:linear-gradient(#fff,#e9e9e9);border-radius:0 0 5px 5px;border:1px solid #aaa}.mini-drum-art{height:240px;position:relative}.mini-drum-art i{position:absolute;display:block}.mini-drum-art .cymbal{width:120px;height:28px;border-radius:50%;background:radial-gradient(ellipse,#ffe9a5,#b78a2a 72%,#725412);border:2px solid #e5c55e;top:20px}.mini-drum-art .cymbal.one{left:8%}.mini-drum-art .cymbal.two{right:5%}.mini-drum-art .tom{width:105px;height:78px;border-radius:50% 50% 38% 38%;background:linear-gradient(90deg,#262c35,#45505d,#191d23);border:5px solid #b8bec5;top:75px}.mini-drum-art .t1{left:28%}.mini-drum-art .t2{right:27%}.mini-drum-art .snare{width:120px;height:65px;border-radius:50%;background:linear-gradient(#e5e7ea,#727981);border:5px solid #c9ced3;left:8%;bottom:12px}.mini-drum-art .kick{width:165px;height:165px;border-radius:50%;background:radial-gradient(circle,#232833 0 48%,#9aa1aa 50% 56%,#171b22 58%);left:50%;transform:translateX(-50%);bottom:-5px}.center{text-align:center}.premium-feature{background:#fff;padding:28px;border:1px solid #e8eaf0;border-radius:22px;box-shadow:0 12px 30px #1d243108}.premium-feature>span{width:52px;height:52px;display:grid;place-items:center;border-radius:16px;background:#f2efff;font-size:25px}.premium-feature h3{font-size:21px;margin:15px 0 8px}.premium-feature p{color:#727787;line-height:1.8}
.instruments-head{text-align:center;padding-top:58px;padding-bottom:38px;background:radial-gradient(circle at 50% 0,#ebe6ff,transparent 50%),#fff}.instruments-head h1{font-size:46px}.studio-shell{max-width:1250px;margin:auto;display:flex;flex-direction:column;gap:34px}.real-piano-card,.real-drum-card{background:#fff;border:1px solid #e6e8ef;border-radius:30px;padding:30px;box-shadow:0 20px 55px #1e26300d}.instrument-title{display:flex;justify-content:space-between;align-items:end;margin-bottom:22px}.instrument-title span{font-size:11px;letter-spacing:3px;color:var(--primary);font-weight:900}.instrument-title h2{font-size:30px;margin:5px 0}.instrument-title small{color:#8d919e}.piano-body{max-width:1040px;margin:auto;padding:28px 30px 25px;background:linear-gradient(155deg,#26272b,#090a0c 55%,#1a1b1f);border-radius:20px 20px 28px 28px;box-shadow:0 30px 45px #0004,inset 0 1px #ffffff1f;position:relative}.piano-brand{text-align:center;color:#d3b66c;font-family:Georgia,serif;letter-spacing:4px;height:56px;font-weight:700}.piano-brand small{display:block;font-size:8px;letter-spacing:2px;color:#8c8d92;margin-top:4px}.keyboard-wrap{height:260px;position:relative;max-width:900px;margin:auto}.white-keys{height:100%;display:grid;grid-template-columns:repeat(8,1fr);gap:2px}.white-key{position:relative;border:1px solid #aeb1b6;border-top:0;border-radius:0 0 7px 7px;background:linear-gradient(90deg,#f5f5f2,#fff 40%,#ededeb);box-shadow:inset 0 -10px 12px #0000000b,0 7px 1px #717279;cursor:pointer;z-index:1}.white-key span,.white-key small{position:absolute;left:0;right:0;text-align:center;color:#777}.white-key span{bottom:27px;font-weight:800}.white-key small{bottom:9px}.white-key.pressed{background:#e7e2ff;transform:translateY(4px);box-shadow:inset 0 -3px 6px #0001}.black-key{position:absolute;top:0;width:7.2%;height:62%;z-index:3;border:0;border-radius:0 0 7px 7px;background:linear-gradient(90deg,#050505,#313238 45%,#030304);box-shadow:0 8px 8px #0006,inset 0 -8px 8px #0008,inset 1px 0 #ffffff18;cursor:pointer}.black-key.pressed{height:60%;background:linear-gradient(#191921,#050506)}.bk1{left:9%}.bk2{left:21.7%}.bk3{left:46.5%}.bk4{left:59%}.bk5{left:71.5%}.piano-base{height:22px;margin:0 auto;max-width:930px;border-radius:0 0 30px 30px;background:linear-gradient(#111216,#030304);box-shadow:0 16px 25px #0007}
.real-drum-card{overflow:hidden}.drum-stage{height:570px;max-width:950px;margin:0 auto;position:relative;background:radial-gradient(ellipse at 50% 100%,#d9dde5 0,#f3f5f9 40%,#fff 70%);border-radius:28px;overflow:hidden}.drum-piece{position:absolute;border:0;cursor:pointer;transition:.12s;z-index:4}.drum-piece.hit{transform:scale(.96) translateY(4px)!important;filter:brightness(1.08)}.drum-piece span{position:absolute;left:0;right:0;text-align:center;font-size:10px;font-weight:900;letter-spacing:1px;color:#616671}.cymbal{width:210px;height:55px;border-radius:50%;background:radial-gradient(ellipse at center,#fff0ad 0,#d9b13f 45%,#9e7419 78%,#66470e);border:3px solid #e8c85b;box-shadow:0 12px 18px #0003,inset 0 2px #fff5}.cymbal span{top:19px;color:#6c5113}.crash{top:52px;left:80px;transform:rotate(-7deg)}.ride{top:60px;right:75px;transform:rotate(8deg)}.tom{width:160px;height:125px;border-radius:50% 50% 35% 35%;background:linear-gradient(90deg,#151b24,#596473 50%,#151b24);border:10px solid #bac0c8;box-shadow:0 12px 20px #0004,inset 0 12px 0 #e8ebee}.tom span{top:35px;color:#e8ecf2}.tom1{top:190px;left:280px;transform:rotate(-5deg)}.tom2{top:184px;right:275px;transform:rotate(5deg)}.snare-real{width:190px;height:92px;border-radius:50%;background:linear-gradient(#f5f6f7 0 35%,#838b94 37% 62%,#d6dade 64%);border:8px solid #aeb5bd;left:130px;top:330px;box-shadow:0 15px 22px #0003}.snare-real span{top:24px}.floor-tom{width:190px;height:165px;border-radius:50% 50% 35% 35%;background:linear-gradient(90deg,#111821,#536170,#111821);border:10px solid #b8bec6;right:105px;top:320px;box-shadow:0 18px 25px #0004,inset 0 14px #e7eaed}.floor-tom span{top:40px;color:#fff}.kick-real{width:270px;height:270px;border-radius:50%;left:50%;bottom:35px;transform:translateX(-50%);background:radial-gradient(circle,#252a31 0 44%,#65707b 45% 48%,#c6cbd0 49% 54%,#181d24 55%);box-shadow:0 24px 38px #0005;border:8px solid #9ca4ad}.kick-real span{top:67%;font-size:13px;color:#e1e3e7}.kick-real b{position:absolute;inset:0;display:grid;place-items:center;color:#d0b45d;font-size:58px}.hihat{width:170px;height:45px;border-radius:50%;background:radial-gradient(ellipse,#fff0a5,#c49b2b 68%,#7b5912);border:3px solid #dabc51;left:35px;top:245px;box-shadow:0 10px 15px #0003}.hihat span{top:13px;color:#60480d}.stand{position:absolute;width:5px;background:linear-gradient(90deg,#777,#eee,#777);z-index:1;transform-origin:bottom}.s1{height:280px;left:173px;top:96px;transform:rotate(7deg)}.s2{height:275px;right:168px;top:103px;transform:rotate(-8deg)}.s3{height:180px;left:115px;top:270px}.s4{height:190px;right:180px;top:330px}
@media(max-width:950px){.premium-hero{grid-template-columns:1fr}.hero-copy h1{font-size:44px}.mini-stage{grid-template-columns:1fr}.grade-premium-grid{grid-template-columns:1fr 1fr}.drum-stage{transform:scale(.82);transform-origin:top center;margin-bottom:-100px}.keyboard-wrap{height:210px}}@media(max-width:620px){.hero-copy h1{font-size:35px}.hero-stats{overflow:auto}.grade-premium-grid{grid-template-columns:1fr}.section-heading{align-items:start;flex-direction:column}.home-login-card{padding:25px}.real-piano-card,.real-drum-card{padding:17px}.keyboard-wrap{height:170px}.black-key{height:59%}.drum-stage{width:900px;transform:scale(.47);transform-origin:top right;margin-bottom:-280px}.instrument-title{align-items:start;flex-direction:column;gap:5px}}

:root{--ink:#111522;--soft:#f7f8fc}
body{background:#f7f8fc;color:var(--ink)}
.premium-hero{display:grid;grid-template-columns:1.3fr .7fr;gap:36px;align-items:center;padding:64px max(5vw,30px);background:radial-gradient(circle at 10% 10%,#efe9ff 0,transparent 34%),linear-gradient(135deg,#fff,#f7f8ff)}
.premium-kicker{display:inline-block;font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--primary);margin-bottom:10px}
.premium-hero h1{font-size:clamp(38px,5vw,70px);line-height:1.08;margin:8px 0 18px}.premium-hero p{font-size:18px;max-width:720px;color:#666d80}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.hero-login-card{background:#111522;color:#fff;border-radius:28px;padding:28px;box-shadow:0 24px 60px #1115222c}.hero-login-card input{width:100%;margin:7px 0;padding:14px 15px;border-radius:12px;border:1px solid #ffffff20;background:#ffffff10;color:#fff}.hero-login-card input::placeholder{color:#ffffff99}.small-link{display:block;text-align:center;color:#fff;margin-top:12px;font-size:13px}
.premium-grade{background:#fff;border-radius:24px;padding:26px;box-shadow:0 14px 36px #1115220c;border:1px solid #e8eaf0}.grade-number{font-size:42px;font-weight:900;color:var(--primary)}
.premium-feature{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;background:#111522;color:#fff;border-radius:34px;margin:32px auto;padding:42px}.mini-piano-preview{height:180px;background:#151515;border:12px solid #2d2d2d;border-radius:18px;display:grid;grid-template-columns:repeat(8,1fr);gap:2px;padding:10px}.mini-piano-preview i{background:linear-gradient(#fff,#e8e8e8);border-radius:0 0 6px 6px}
.auth-page{padding:60px 5vw}.auth-shell{max-width:1050px;margin:auto;display:grid;grid-template-columns:1fr 1fr;background:#fff;border-radius:34px;overflow:hidden;box-shadow:0 24px 70px #11152218}.auth-side{padding:55px;background:linear-gradient(145deg,#111522,#2a2f42);color:#fff}.auth-card{padding:46px}.auth-card label{display:block;margin-bottom:14px;font-weight:700}.auth-card input,.auth-card select{width:100%;padding:13px 14px;margin-top:7px;border:1px solid #dfe2eb;border-radius:12px;font:inherit}.auth-switch{text-align:center;margin-top:18px}.auth-points{display:grid;gap:12px;margin-top:28px}
.studio-hero{text-align:center;padding:56px 20px;background:linear-gradient(180deg,#fff,#f2f4f9)}.studio-shell{max-width:1250px;margin:auto;padding:30px}
.grand-piano-card{background:linear-gradient(145deg,#121212,#2b2b2b);border-radius:30px;padding:28px 28px 36px;box-shadow:0 30px 70px #0003;border:1px solid #3a3a3a}.piano-top{height:92px;border-radius:18px 18px 8px 8px;background:linear-gradient(#252525,#0e0e0e);display:flex;align-items:center;justify-content:center;position:relative;color:#d9c799}.brand{font-family:serif;letter-spacing:.25em;font-size:18px}.keyboard-shell{background:#080808;padding:14px;border-radius:8px;box-shadow:inset 0 3px 14px #000}.keys{position:relative;display:flex;height:245px;max-width:1050px;margin:auto}.keys button{border:0;cursor:pointer;user-select:none}.keys .white{position:relative;flex:1;background:linear-gradient(90deg,#fff,#f7f7f7 65%,#e9e9e9);border:1px solid #bfc1c5;border-radius:0 0 8px 8px;box-shadow:inset 0 -12px 18px #00000012;z-index:1;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;padding-bottom:14px;font-weight:700}.keys .white.pressed{background:#e6e6e6;transform:translateY(3px)}.keys .black{position:absolute;width:8.7%;height:150px;background:linear-gradient(90deg,#181818,#020202 55%,#272727);border-radius:0 0 7px 7px;z-index:3;box-shadow:0 8px 9px #0008}.keys .black.pressed{transform:translateY(3px);background:#111}.b1{left:9.8%}.b2{left:24.1%}.b4{left:52.7%}.b5{left:67%}.b6{left:81.3%}.piano-footer{text-align:center;color:#aaa;margin-top:14px;font-size:13px}
.drum-stage{margin-top:45px;background:radial-gradient(circle at 50% 30%,#2d3142,#111522 70%);border-radius:34px;padding:32px;color:#fff;overflow:hidden}.drum-title{text-align:center}.drum-kit{height:600px;max-width:900px;margin:10px auto 0;position:relative}.drum-kit button{position:absolute;cursor:pointer;transition:.08s transform;box-shadow:0 18px 30px #0007}.drum-kit button.hit{transform:scale(.96) translateY(3px)}.cymbal{border-radius:50%;border:3px solid #d9b44a;background:radial-gradient(circle,#f8e091,#c99e31 55%,#8f6a18);height:55px;color:#30220a;font-weight:800}.crash{width:220px;left:60px;top:80px;transform:rotate(-8deg)}.ride{width:235px;right:55px;top:90px;transform:rotate(8deg)}.hihat{width:170px;left:70px;top:250px}.drum{border-radius:50%;border:9px solid #c9ccd3;background:radial-gradient(circle at 50% 45%,#f7f7f7,#d8d8d8 55%,#a9adb5 56%,#3b404c 65%);color:#222;font-weight:900}.tom1{width:150px;height:150px;left:300px;top:135px}.tom2{width:150px;height:150px;right:300px;top:135px}.snare{width:175px;height:175px;left:190px;top:315px}.floor{width:200px;height:200px;right:150px;top:320px}.kick{width:260px;height:260px;left:320px;top:300px;background:radial-gradient(circle,#151515 0 42%,#2e3440 43% 58%,#c8c8c8 59% 64%,#111 65%);color:#fff;border:12px solid #c4c6cc}.drum-kit span{pointer-events:none}.stand{position:absolute;width:7px;background:#aeb2bb;bottom:20px;top:120px;transform-origin:bottom}.s1{left:155px;transform:rotate(10deg)}.s2{right:155px;transform:rotate(-10deg)}.s3{left:50%;height:340px;top:210px}
@media(max-width:850px){.premium-hero,.auth-shell,.premium-feature{grid-template-columns:1fr}.studio-shell{padding:15px}.keys{height:190px;overflow:hidden}.drum-kit{transform:scale(.72);transform-origin:top center;height:460px}.premium-feature{margin:18px}.hero-login-card{margin-top:10px}}
/* V7 Luxury studio theme */
*{box-sizing:border-box}.lux-body{margin:0;background:#0c1625;color:#eef4ff;font-family:Tahoma,Arial,sans-serif}.lux-main{min-height:calc(100vh - 86px)}
.lux-topbar{height:94px;background:linear-gradient(90deg,#13243b,#0d1c30);display:grid;grid-template-columns:320px 1fr 260px;align-items:center;padding:0 28px;gap:20px;border-bottom:1px solid #ffffff10;position:sticky;top:0;z-index:50;box-shadow:0 12px 32px #0005}.lux-brand{display:flex;align-items:center;gap:12px;color:#fff;text-decoration:none}.treble{font-size:58px;color:#f5c354;line-height:1}.lux-brand strong{font-size:21px;display:block}.lux-brand small{font-size:11px;color:#b9c8da;display:block;margin-top:4px}.lux-brand img{height:58px;max-width:80px;object-fit:contain}.lux-nav{display:flex;justify-content:center;align-items:center;gap:22px}.lux-nav a{color:#d6e0ee;text-decoration:none;font-weight:700;font-size:14px;padding:33px 4px 27px;border-bottom:3px solid transparent;white-space:nowrap}.lux-nav a:hover,.lux-nav .active-nav{color:#2f9cff;border-bottom-color:#2f9cff}.account-zone{display:flex;align-items:center;gap:9px;justify-content:flex-end}.account-zone small{display:block;color:#9db0c8}.avatar-circle{width:46px;height:46px;border-radius:50%;background:#e8eef6;color:#26354a;display:grid;place-items:center}.logout-icon,.top-login{color:#fff;text-decoration:none}.top-login{border:1px solid #ffffff30;padding:10px 15px;border-radius:10px}
.dashboard-hero{min-height:610px;display:grid;grid-template-columns:1.2fr .8fr;gap:50px;align-items:center;padding:70px 7vw;background:radial-gradient(circle at 20% 15%,#123b67 0,transparent 30%),linear-gradient(135deg,#0b1625,#132238 65%,#0e1d31);position:relative;overflow:hidden}.dashboard-hero:after{content:'♫';position:absolute;font-size:420px;color:#ffffff05;left:5%;bottom:-130px}.hero-copy-lux{position:relative;z-index:2}.eyebrow{color:#f4c152;font-size:13px;font-weight:800;letter-spacing:.08em}.hero-copy-lux h1{font-size:clamp(46px,6vw,82px);line-height:1.08;margin:15px 0;color:#fff}.hero-copy-lux h1 em{font-style:normal;color:#269dff}.hero-copy-lux p{font-size:19px;line-height:1.9;color:#b7c6d9;max-width:690px}.hero-buttons{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.blue-cta,.glass-cta{display:inline-flex;align-items:center;justify-content:center;padding:14px 22px;border-radius:10px;text-decoration:none;font-weight:800;border:0;cursor:pointer}.blue-cta{background:linear-gradient(135deg,#208cff,#0d71e8);color:#fff;box-shadow:0 10px 25px #1685f23b}.glass-cta{background:#ffffff0d;color:#fff;border:1px solid #ffffff1f}.full{width:100%}.home-login-panel{background:linear-gradient(145deg,#14263d,#0c1828);border:1px solid #ffffff13;border-radius:24px;padding:30px;box-shadow:0 30px 80px #0006;position:relative;z-index:3}.login-panel-title{display:flex;gap:13px;align-items:center;margin-bottom:20px}.login-panel-title>span{font-size:30px}.login-panel-title h3{margin:0}.login-panel-title p{margin:4px 0 0;color:#9eafc4}.home-login-panel label{display:block;color:#c9d5e4;font-size:13px;margin:13px 0}.home-login-panel input{width:100%;padding:14px;border-radius:9px;border:1px solid #ffffff17;background:#091421;color:#fff;margin-top:7px}.create-link{display:block;text-align:center;color:#5eb2ff;text-decoration:none;margin-top:14px}.welcome-card{text-align:center;padding:40px 10px}.welcome-card>div{font-size:60px}
.home-studio-preview{display:grid;grid-template-columns:.75fr 1.25fr;gap:40px;align-items:center;padding:55px 6vw;background:#f3f6fa;color:#162033}.studio-copy h2{font-size:42px;margin:10px 0}.studio-copy p{line-height:1.9;color:#697386}.preview-image{border-radius:24px;overflow:hidden;box-shadow:0 25px 65px #22334b22;border:1px solid #dce3ec}.preview-image img{width:100%;display:block}.grade-lux-section{padding:55px 6vw;background:#fff;color:#162033}.section-heading span{color:#178df1;font-weight:800}.section-heading h2{font-size:38px;margin:6px 0 24px}.grade-lux-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.grade-lux-card{background:#f7f9fc;border:1px solid #e1e7ef;border-radius:20px;padding:25px;text-decoration:none;color:#18263a;transition:.2s}.grade-lux-card:hover{transform:translateY(-5px);box-shadow:0 18px 36px #1c2b3e16}.grade-lux-card strong{font-size:48px;color:#168df1}.grade-lux-card span{color:#168df1;font-weight:800}
.studio-layout{display:grid;grid-template-columns:135px 1fr;min-height:calc(100vh - 94px);background:#0d1726}.instrument-sidebar{background:linear-gradient(#14263a,#0e1a2a);padding:22px 12px;display:flex;flex-direction:column;gap:10px;border-left:1px solid #ffffff12}.side-tool{height:92px;border:1px solid #ffffff18;border-radius:13px;color:#e4edf8;text-decoration:none;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;background:#ffffff04;font-size:24px}.side-tool span{font-size:13px;font-weight:700}.side-tool.active,.side-tool:hover{background:linear-gradient(135deg,#1696ff,#0e73e9);border-color:#3fb1ff;box-shadow:0 10px 30px #168ff840}.studio-content{padding:0 0 36px}.instrument-split{display:grid;grid-template-columns:1fr 1fr;gap:0}.real-instrument-card{position:relative;background:#111a28;border-left:1px solid #ffffff12;min-height:565px;overflow:hidden}.photo-wrap{height:500px;overflow:hidden;position:relative}.photo-wrap img{width:100%;height:100%;object-fit:cover;display:block}.piano-photo-card .photo-wrap img{object-position:center center}.drum-photo-card .photo-wrap img{object-position:center center}.photo-wrap:after{content:'';position:absolute;inset:0;background:linear-gradient(to top,#0c1625d9 0,transparent 27%);pointer-events:none}.instrument-label{position:absolute;bottom:15px;right:24px;display:flex;align-items:center;gap:12px;z-index:2}.instrument-label>span{font-size:38px}.instrument-label h2{margin:0;font-size:27px}.instrument-label p{margin:4px 0;color:#afbed0}.drum-hotspot{position:absolute;z-index:4;background:#111a26db;color:#fff;border:1px solid #ffffff5a;border-radius:18px;padding:6px 10px;font-weight:700;cursor:pointer;box-shadow:0 5px 16px #0007}.drum-hotspot:hover,.drum-hotspot.hit{background:#168df1;transform:scale(1.05)}.crash-hot{left:21%;top:8%}.ride-hot{right:10%;top:10%}.hat-hot{left:8%;top:29%}.tom1-hot{left:35%;top:27%}.tom2-hot{right:29%;top:28%}.snare-hot{left:27%;top:55%}.floor-hot{right:11%;top:59%}.kick-hot{left:49%;top:70%}
.play-console{margin:20px 22px 0;background:#121f30;border:1px solid #ffffff13;border-radius:20px;overflow:hidden;box-shadow:0 22px 50px #0004}.console-tabs{display:flex;gap:0;background:#172638;border-bottom:1px solid #ffffff12}.console-tabs button{flex:1;padding:16px;background:transparent;color:#c6d4e4;border:0;font-weight:700}.console-tabs button.active{background:#1189f7;color:#fff}.real-keyboard{height:190px;background:#0b1017;padding:0 18px 18px;display:flex;position:relative;direction:ltr}.white-key{position:relative;flex:1;height:165px;border:1px solid #aab0ba;border-radius:0 0 6px 6px;background:linear-gradient(90deg,#fff,#f4f4f4 55%,#e5e5e5);box-shadow:inset 0 -8px 12px #0001;color:#111;font-size:17px;font-weight:900;padding-top:126px;z-index:1;cursor:pointer}.white-key.pressed{transform:translateY(4px);background:#ddd}.black-key{position:absolute;z-index:3;width:4.1%;height:105px;top:0;background:linear-gradient(90deg,#1d1d1d,#020202 55%,#242424);color:#f33;border:0;border-radius:0 0 4px 4px;font-size:10px;font-weight:800;padding-top:70px;cursor:pointer;box-shadow:0 5px 8px #0008}.black-key.pressed{transform:translateY(3px)}.k1{left:6.3%}.k2{left:13.4%}.k4{left:27.7%}.k5{left:34.8%}.k6{left:41.9%}.k8{left:56.2%}.k9{left:63.3%}.k11{left:77.6%}.k12{left:84.7%}.k13{left:91.8%}.drum-console{display:grid;grid-template-columns:180px 1fr 180px;gap:18px;align-items:center;padding:18px 24px;background:#111c2a}.drum-console span{display:block;color:#8798ad;font-size:12px}.drum-console select{background:#0b1522;color:#fff;border:1px solid #405065;padding:10px;border-radius:8px}.lux-footer{padding:20px 6vw;background:#08121f;color:#788da5;display:flex;justify-content:space-between;font-size:12px}
@media(max-width:1100px){.lux-topbar{grid-template-columns:240px 1fr}.account-zone{display:none}.lux-nav{gap:12px}.lux-nav span{display:none}.dashboard-hero,.home-studio-preview{grid-template-columns:1fr}.grade-lux-grid{grid-template-columns:repeat(2,1fr)}.studio-layout{grid-template-columns:90px 1fr}.instrument-split{grid-template-columns:1fr}.real-instrument-card{min-height:auto}.photo-wrap{height:430px}.instrument-sidebar{padding:12px 7px}.side-tool{height:75px}.side-tool span{font-size:11px}.real-keyboard{overflow-x:auto;min-width:800px}.play-console{overflow:auto}}
@media(max-width:700px){.lux-topbar{height:auto;grid-template-columns:1fr;padding:12px}.lux-brand{justify-content:center}.lux-nav{overflow-x:auto;justify-content:flex-start}.lux-nav a{padding:12px 4px}.dashboard-hero{padding:45px 22px}.home-studio-preview,.grade-lux-section{padding:35px 20px}.grade-lux-grid{grid-template-columns:1fr 1fr}.studio-layout{grid-template-columns:1fr}.instrument-sidebar{position:sticky;top:119px;z-index:20;flex-direction:row;overflow-x:auto}.side-tool{min-width:75px;height:65px}.studio-content{min-width:0}.photo-wrap{height:330px}.drum-console{grid-template-columns:1fr}.lux-footer{flex-direction:column;gap:7px}}

/* V8 educational + studio */
.lesson-hero-pro{max-width:1220px;margin:30px auto;display:grid;grid-template-columns:1.15fr .85fr;gap:34px;align-items:center;padding:36px;border-radius:30px;background:linear-gradient(135deg,#0c2038,#102d50);color:white;box-shadow:0 24px 60px #0c203830}.lesson-hero-pro h1{font-size:46px;margin:12px 0}.lesson-hero-pro p{color:#dbe9f8;font-size:17px;line-height:1.9}.lesson-hero-pro img{width:100%;border-radius:22px;background:#fff}.lesson-chip{display:inline-flex;padding:8px 13px;border-radius:999px;background:#ffffff18;color:#8fd1ff;font-size:13px}.lesson-actions{display:flex;gap:10px;margin-top:20px}.studio-btn,.teacher-btn{display:inline-flex;padding:11px 17px;border-radius:12px;background:#1488ff;color:#fff;font-weight:800}.teacher-btn{background:#ffffff14;border:1px solid #ffffff30}
.lesson-pro-wrap{max-width:1000px;margin:0 auto 60px;display:grid;gap:20px}.edu-card,.quiz-pro{background:#fff;border:1px solid #e8edf4;border-radius:24px;padding:28px;box-shadow:0 12px 30px #12213a0b;position:relative}.card-icon{display:inline-flex;min-width:42px;height:42px;align-items:center;justify-content:center;border-radius:12px;background:#eaf4ff;color:#1378dd;font-weight:900}.edu-card h2{margin:12px 0 16px}.reading{font-size:17px;line-height:2;color:#38445a;white-space:normal}.example-card{border-right:5px solid #8d63ff}.practice-card{border-right:5px solid #26bd8a}.audio-pro{margin-top:20px;padding:16px;border-radius:16px;background:#f5f8fc;display:flex;align-items:center;gap:16px;flex-wrap:wrap}.audio-pro audio{flex:1;min-width:240px}.quiz-heading{display:flex;gap:14px;align-items:center;margin-bottom:20px}.quiz-heading>span{width:44px;height:44px;border-radius:13px;background:#132943;color:white;display:flex;align-items:center;justify-content:center;font-weight:900}.question-pro{padding:22px 0;border-top:1px solid #edf0f5}.question-pro:first-of-type{border-top:0}.qtype{color:#1686ff;font-size:13px;font-weight:900;margin-bottom:8px}.circle-options{display:grid;gap:10px;margin-top:14px}.circle-options button{display:flex;gap:12px;align-items:center;text-align:right;padding:13px 15px;border:1px solid #dfe5ee;border-radius:13px;background:#fff;font:inherit;cursor:pointer}.circle-options i{width:20px;height:20px;border:2px solid #9aa7b8;border-radius:50%;display:block}.circle-options button.chosen{border-color:#1686ff;background:#eef7ff}.circle-options button.chosen i{border:6px solid #1686ff}.text-answer{width:100%;padding:14px;border:1px solid #dce3ec;border-radius:14px;font:inherit;margin:12px 0}.save-text,.complete-form button{border:0;border-radius:12px;background:#1686ff;color:#fff;padding:12px 20px;font-weight:900;cursor:pointer}.feedback{margin-top:10px;font-weight:800}.feedback.correct{color:#149451}.feedback.wrong{color:#c54c4c}.summary-card{background:linear-gradient(135deg,#fff,#f7fbff)}.complete-form{text-align:center}.complete-form button{font-size:17px;padding:15px 30px}
.teacher-hero-pro{max-width:1220px;margin:30px auto;padding:32px 38px;background:#10253e;color:white;border-radius:28px;display:flex;justify-content:space-between;align-items:center}.teacher-hero-pro span{color:#77c5ff;font-weight:800}.teacher-hero-pro a{background:#1686ff;color:#fff;padding:12px 18px;border-radius:12px;font-weight:800}.teacher-grid-pro{max-width:1120px;margin:0 auto 60px;display:grid;grid-template-columns:1fr 1fr;gap:18px}.teacher-grid-pro section{background:#fff;border:1px solid #e4e9f1;border-radius:20px;padding:24px;line-height:1.9}.teacher-grid-pro .wide{grid-column:1/-1}.teacher-example{background:linear-gradient(135deg,#f9fbff,#f3f0ff)!important}.teacher-example audio{width:100%;margin:10px 0}.teacher-example a{display:inline-block;background:#10253e;color:#fff;padding:10px 15px;border-radius:10px}
.results-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.student-result-card{display:flex;flex-direction:column;padding:18px;border:1px solid #e1e7ef;border-radius:16px;background:#fff}.student-result-card strong{font-size:18px}.student-result-card span{color:#718096}.student-result-card small{margin-top:10px;color:#1686ff}
.lux-studio-page{display:grid;grid-template-columns:105px 1fr;min-height:calc(100vh - 80px);background:#09182a}.lux-rail{background:#0d1f34;padding:18px 10px;display:flex;flex-direction:column;gap:12px;border-left:1px solid #ffffff10}.lux-rail a{min-height:88px;border-radius:14px;border:1px solid #ffffff14;color:#dbe9f8;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:7px}.lux-rail a.active,.lux-rail a:hover{background:#1185ff;color:white}.lux-rail b{font-size:28px}.lux-studio-main{padding:20px;overflow:hidden}.studio-banner{display:grid;grid-template-columns:.55fr 1.45fr;gap:20px;background:#0e223b;border-radius:22px;overflow:hidden;color:white;margin-bottom:20px}.studio-banner>div{padding:28px}.studio-banner img{width:100%;height:260px;object-fit:cover;object-position:center}.studio-banner span,.stage-head span{color:#5db8ff;font-size:12px;letter-spacing:.12em}.real-stage-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.real-stage{background:#0f2238;border:1px solid #ffffff14;border-radius:22px;padding:14px;color:white}.real-stage>img{width:100%;aspect-ratio:1.27/1;object-fit:cover;border-radius:15px}.stage-head{display:flex;justify-content:space-between;align-items:center;padding:5px 5px 13px}.stage-head h2{margin:3px 0}.stage-head b{font-size:12px;color:#afc5da}.drum-photo-interactive{position:relative}.drum-photo-interactive img{width:100%;display:block;border-radius:15px}.drum-photo-interactive button{position:absolute;transform:translate(-50%,-50%);border:1px solid #ffffff44;background:#091522dc;color:#fff;border-radius:999px;padding:7px 10px;font-weight:800;box-shadow:0 6px 16px #0005;cursor:pointer}.drum-photo-interactive button:hover,.drum-photo-interactive button.hit{background:#1686ff;transform:translate(-50%,-50%) scale(1.06)}
.instrument-console{background:#0e223b;border:1px solid #ffffff14;border-radius:22px;margin-top:18px;padding:18px;color:white}.console-head{display:flex;justify-content:space-between;align-items:center}.console-head button{background:transparent;border:0;color:#b9cbdd;padding:10px 14px}.console-head button.active{background:#1686ff;color:white;border-radius:10px}.keyboard-real{height:230px;background:#06090e;border-radius:12px;padding:7px;position:relative;overflow:hidden}.white-row{display:flex;height:100%;gap:2px}.white-row .w{flex:1;background:linear-gradient(#fff,#e8e8e8);border:1px solid #aeb4be;border-radius:0 0 6px 6px;display:flex;align-items:flex-end;justify-content:center;padding-bottom:12px;font-weight:900;color:#1a2432}.black-row{position:absolute;inset:7px}.black-row .b{position:absolute;top:0;width:4.7%;height:62%;border:0;border-radius:0 0 5px 5px;background:linear-gradient(90deg,#232323,#050505 55%,#2c2c2c);z-index:3}.black-pos-1{left:4.8%}.black-pos-2{left:11.9%}.black-pos-4{left:26.2%}.black-pos-5{left:33.3%}.black-pos-6{left:40.5%}.black-pos-8{left:54.8%}.black-pos-9{left:61.9%}.black-pos-11{left:76.2%}.black-pos-12{left:83.3%}.black-pos-13{left:90.5%}.keyboard-real button.pressed{transform:translateY(3px);filter:brightness(.85)}.drum-controls{display:flex;gap:20px;align-items:center;margin-top:16px}.drum-controls label{flex:1}.drum-controls input{width:70%;margin-right:12px}.drum-controls select{width:100%;padding:10px;background:#0b192b;color:#fff;border:1px solid #30445b;border-radius:10px}
@media(max-width:900px){.lesson-hero-pro,.real-stage-grid,.studio-banner{grid-template-columns:1fr}.teacher-grid-pro{grid-template-columns:1fr}.teacher-grid-pro .wide{grid-column:auto}.results-grid{grid-template-columns:1fr}.lux-studio-page{grid-template-columns:1fr}.lux-rail{flex-direction:row;overflow:auto}.lux-rail a{min-width:90px}.keyboard-real{height:160px}.lesson-hero-pro h1{font-size:34px}}

/* V9 true image-hotspot instruments */
.pro-studio-head{background:linear-gradient(135deg,#0b1c31,#102b49);color:#fff;padding:42px max(5vw,30px);border-bottom:1px solid #ffffff12}.pro-studio-head span{font-size:12px;letter-spacing:.15em;color:#69baff;font-weight:900}.pro-studio-head h1{font-size:42px;margin:8px 0}.pro-studio-head p{color:#c8d8e8}
.instrument-pro-shell{display:grid;grid-template-columns:110px 1fr;min-height:720px;background:#071421}.instrument-menu{background:#0c1b2b;border-left:1px solid #ffffff0e;padding:18px 10px;display:flex;flex-direction:column;gap:12px}.instrument-menu button{border:1px solid #ffffff12;background:#112438;color:#dce9f5;border-radius:16px;min-height:92px;font-size:28px;cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px}.instrument-menu button span{font-size:13px;font-weight:800}.instrument-menu button.active{background:#1186ff;color:#fff;box-shadow:0 10px 28px #1186ff42}
.instrument-workspace{padding:24px;background:radial-gradient(circle at 50% 0,#15314d 0,#091724 45%,#071421 100%)}.instrument-panel{display:none;max-width:1180px;margin:auto}.instrument-panel.active{display:block}.panel-title{display:flex;justify-content:space-between;align-items:center;color:#fff;margin-bottom:16px}.panel-title span{color:#69baff;font-size:11px;letter-spacing:.14em}.panel-title h2{font-size:30px;margin:4px 0}.status-dot{font-size:13px;color:#80d6a6;background:#0f2b26;padding:8px 12px;border-radius:999px;border:1px solid #2c6f59}
.playable-image{position:relative;background:#0a0f15;border:1px solid #ffffff12;border-radius:24px;overflow:hidden;box-shadow:0 28px 60px #0008}.playable-image img{display:block;width:100%;height:auto;user-select:none;-webkit-user-drag:none}.piano-image-wrap{max-width:1100px;margin:auto;background:#fff}.piano-image-wrap img{image-rendering:auto}.play-glow{position:absolute;width:70px;height:70px;border-radius:50%;pointer-events:none;transform:translate(-50%,-50%);opacity:0;background:radial-gradient(circle,#57b9ff88,transparent 70%)}.play-glow.flash{animation:keyFlash .25s ease-out}@keyframes keyFlash{0%{opacity:.95;transform:translate(-50%,-50%) scale(.6)}100%{opacity:0;transform:translate(-50%,-50%) scale(1.4)}}
.drum-image-wrap{max-width:760px;margin:auto}.hotspot-layer{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}.drum-hotspot{pointer-events:auto;fill:rgba(30,145,255,0);stroke:rgba(120,205,255,0);stroke-width:3;cursor:pointer;transition:.12s}.drum-hotspot:hover{fill:rgba(30,145,255,.08);stroke:rgba(120,205,255,.35)}.drum-hotspot.hit{fill:rgba(70,180,255,.18);stroke:#73cfff;stroke-width:6}
.instrument-tip{text-align:center;color:#a9bfd4;font-size:14px;margin:14px 0}.drum-legend{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-top:15px}.drum-legend span{background:#10283e;color:#cfe5f8;border:1px solid #244766;padding:7px 10px;border-radius:999px;font-size:12px}
@media(max-width:800px){.instrument-pro-shell{grid-template-columns:1fr}.instrument-menu{flex-direction:row;overflow:auto}.instrument-menu button{min-width:96px;min-height:75px}.instrument-workspace{padding:12px}.pro-studio-head h1{font-size:32px}}

/* V10.1 premium instrument redesign */
.premium-studio-head{background:radial-gradient(circle at 75% 0,#1e4c78 0,transparent 35%),linear-gradient(135deg,#091b2d,#0d2b48);padding:52px 6vw}
.premium-studio-head h1{font-size:46px}
.premium-layout{background:#06131f}
.premium-side{background:#0a1c2c;border-left:1px solid #ffffff10}
.premium-side button{border-radius:18px;border:1px solid #ffffff14;background:#11283d}
.premium-side button.active{background:linear-gradient(135deg,#0d7fff,#159dff);box-shadow:0 14px 30px #148cff35}
.premium-instrument-title{background:#0b1f32;border:1px solid #ffffff10;border-radius:18px;padding:18px 20px}
.premium-instrument-title p{margin:5px 0 0;color:#96aec4;font-size:13px}
.premium-instrument-title b{background:#0d2a42;padding:10px 14px;border-radius:999px;border:1px solid #244b68;color:#8dd1ff}
.premium-photo{position:relative;max-width:1100px;margin:18px auto 0;border-radius:26px;overflow:hidden;background:#050b11;box-shadow:0 32px 80px #0009;border:1px solid #ffffff12}
.premium-photo img{display:block;width:100%;height:auto;user-select:none;-webkit-user-drag:none}
.piano-premium{aspect-ratio:780/610}
.piano-premium img{width:100%;height:100%;object-fit:cover}
.p-white-hot,.p-black-hot{position:absolute;border:0;background:transparent;cursor:pointer;z-index:4}
.p-white-hot{top:60.2%;height:8.9%}
.p-black-hot{top:59.6%;width:3.15%;height:5.9%;z-index:6}
.p-white-hot:hover{background:#2ba9ff15}
.p-black-hot:hover{background:#36b2ff20}
.p-white-hot.hit,.p-black-hot.hit{box-shadow:inset 0 0 0 2px #57c1ff;background:#57c1ff16}
.drum-premium{max-width:820px}
.premium-drum-map{position:absolute;inset:0;width:100%;height:100%;z-index:5}
.premium-drum-map ellipse{fill:transparent;stroke:transparent;stroke-width:4;cursor:pointer;transition:.1s}
.premium-drum-map ellipse:hover{fill:#1d9fff12;stroke:#65c7ff66}
.premium-drum-map ellipse.hit{fill:#35b3ff28;stroke:#7dd2ff;stroke-width:6}
.tap-glow{position:absolute;width:90px;height:90px;border-radius:50%;pointer-events:none;z-index:8;transform:translate(-50%,-50%);opacity:0;background:radial-gradient(circle,#58c5ff99 0,#58c5ff35 35%,transparent 72%)}
.tap-glow.flash{animation:premiumTap .32s ease-out}
@keyframes premiumTap{0%{opacity:1;transform:translate(-50%,-50%) scale(.45)}100%{opacity:0;transform:translate(-50%,-50%) scale(1.45)}}
.instrument-info-row{max-width:1100px;margin:13px auto 0;background:#0a1c2d;border:1px solid #ffffff10;border-radius:14px;padding:12px 16px;color:#a9bdd0;display:flex;justify-content:space-between;gap:15px;font-size:13px}
.preview-images img:first-child{object-fit:cover;padding:0}
@media(max-width:800px){.premium-studio-head h1{font-size:34px}.instrument-info-row{flex-direction:column}.p-white-hot{top:60%;height:9.5%}.p-black-hot{top:59.5%;height:6.2%}}

/* V10.2 — HQ instrument photography */
.hq-studio-head{background:radial-gradient(circle at 80% 0,#214f7d 0,transparent 34%),linear-gradient(135deg,#081a2d,#0c2946);padding:52px 6vw}
.hq-studio-head h1{font-size:46px;margin:8px 0}.hq-layout{background:#06131f}.hq-side{background:#091b2a;border-left:1px solid #ffffff10}.hq-side button{border-radius:17px;background:#10263b;border:1px solid #ffffff13;transition:.2s}.hq-side button.active{background:linear-gradient(135deg,#0a79f2,#159fff);box-shadow:0 14px 32px #118aff33}
.hq-title{background:#0a1f32;border:1px solid #ffffff10;padding:18px 20px;border-radius:18px}.hq-title p{margin:5px 0 0;color:#98afc4;font-size:13px}.hq-title b{background:#102c45;color:#91d4ff;border:1px solid #28516f;padding:10px 14px;border-radius:999px}
.hq-photo{position:relative;max-width:1120px;margin:18px auto 0;border-radius:25px;overflow:hidden;background:#050b11;border:1px solid #ffffff12;box-shadow:0 34px 80px #0009}.hq-photo picture,.hq-photo img{display:block;width:100%;height:auto}.hq-photo img{user-select:none;-webkit-user-drag:none}
.piano-white-hot,.piano-black-hot{position:absolute;border:0;background:transparent;cursor:pointer;padding:0;z-index:5}.piano-white-hot{top:62.2%;height:9.8%}.piano-black-hot{top:61.9%;height:6.8%;z-index:7}.piano-white-hot:hover{background:#35aaff13}.piano-black-hot:hover{background:#4cbaff1f}.piano-white-hot.hit,.piano-black-hot.hit{box-shadow:inset 0 0 0 2px #65c8ff;background:#5cc5ff1c}
.drums-hq{max-width:1000px}.drum-hit-map{position:absolute;inset:0;width:100%;height:100%;z-index:6}.drum-hit-map ellipse{fill:transparent;stroke:transparent;stroke-width:5;cursor:pointer;transition:.1s}.drum-hit-map ellipse:hover{fill:#219cff10;stroke:#74cfff66}.drum-hit-map ellipse.hit{fill:#3bb5ff26;stroke:#88d7ff;stroke-width:7}
.tap-flash{position:absolute;width:92px;height:92px;border-radius:50%;pointer-events:none;z-index:10;transform:translate(-50%,-50%);opacity:0;background:radial-gradient(circle,#6ad0ff99 0,#4abfff3b 38%,transparent 72%)}.tap-flash.show{animation:hqTap .32s ease-out}@keyframes hqTap{0%{opacity:1;transform:translate(-50%,-50%) scale(.4)}100%{opacity:0;transform:translate(-50%,-50%) scale(1.5)}}
.hq-info{max-width:1120px;margin:13px auto 0;padding:12px 16px;border:1px solid #ffffff10;border-radius:13px;background:#091c2d;color:#a9bfd2;display:flex;align-items:center;justify-content:space-between;gap:15px}.hq-info strong{color:#75c9ff}
.preview-images img{object-fit:cover!important;padding:0!important}
@media(max-width:800px){.hq-studio-head h1{font-size:34px}.hq-info{flex-direction:column;align-items:flex-start}.piano-white-hot{top:62%;height:10.5%}.piano-black-hot{top:61.8%;height:7.2%}}
body{background:#f6f8fc;color:#182238}.modern-topbar{height:78px;background:rgba(255,255,255,.97);border-bottom:1px solid #e9edf4;display:flex;align-items:center;padding:0 34px;gap:30px;position:sticky;top:0;z-index:100}.modern-brand{display:flex;align-items:center;gap:11px;min-width:250px}.brand-icon{width:46px;height:46px;border-radius:14px;background:linear-gradient(135deg,#5b7cff,#7e64f5);color:#fff;display:grid;place-items:center;font-size:30px}.modern-brand strong{display:block;font-size:17px}.modern-brand small{display:block;color:#8a96a8;font-size:11px}.modern-nav{display:flex;gap:24px;flex:1;justify-content:center}.modern-nav a{color:#546176;font-weight:700;padding:28px 0;border-bottom:3px solid transparent}.modern-nav a:hover{color:#5b7cff;border-color:#5b7cff}.modern-account{display:flex;align-items:center;gap:10px}.user-chip{display:flex;align-items:center;gap:9px}.user-avatar{width:40px;height:40px;border-radius:12px;background:#edf1ff;color:#5b7cff;display:grid;place-items:center;font-weight:900}.user-chip b{display:block;font-size:13px}.user-chip small{display:block;color:#8a95a5;font-size:10px}.logout-link{color:#8c96a5;font-size:12px}.login-btn,.signup-btn{padding:10px 14px;border-radius:11px;font-weight:800}.signup-btn{background:#5b7cff;color:#fff}.modern-hero{max-width:1320px;margin:34px auto;padding:40px;display:grid;grid-template-columns:1.05fr .95fr;gap:38px;align-items:center}.hero-pill{display:inline-flex;background:#eef1ff;color:#5b62d9;padding:8px 13px;border-radius:999px;font-size:12px;font-weight:900}.hero-main h1{font-size:clamp(44px,5vw,68px);line-height:1.1;margin:16px 0}.hero-main h1 em{font-style:normal;color:#5b7cff}.hero-main>p{font-size:18px;line-height:1.9;color:#66758b}.hero-actions-modern{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}.hero-actions-modern a{padding:13px 18px;border-radius:13px;font-weight:900}.action-primary{background:#5b7cff;color:#fff}.action-light{background:#fff;border:1px solid #e0e5ed}.action-dark{background:#172238;color:#fff}.hero-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:32px}.hero-metrics div{background:#fff;border:1px solid #e7ebf2;border-radius:16px;padding:14px}.hero-metrics b{display:block;font-size:25px}.hero-metrics span{font-size:11px;color:#8a96a6}.hero-visual{display:grid;gap:14px}.hero-card{background:#fff;border:1px solid #e7ebf2;border-radius:24px}.hero-card.large{padding:16px}.visual-head{display:flex;justify-content:space-between;margin-bottom:12px}.visual-instruments{display:grid;grid-template-columns:1fr 1fr;gap:10px}.visual-instruments img{width:100%;height:220px;object-fit:cover;border-radius:17px}.hero-card.small{display:flex;gap:12px;padding:16px 20px}.staff-mini>span{font-size:28px}.staff-mini b{display:block}.staff-mini small{color:#8a96a6}.modern-section{max-width:1240px;margin:68px auto;padding:0 24px}.modern-section-head{text-align:center;max-width:760px;margin:0 auto 30px}.modern-section-head>span{color:#5b7cff;font-weight:900;font-size:12px}.modern-section-head h2{font-size:38px;margin:9px 0}.modern-section-head p{color:#718096}.modern-grade-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.modern-grade-card{background:#fff;border:1px solid #e7ebf2;border-radius:22px;padding:22px}.grade-badge{width:52px;height:52px;border-radius:15px;background:#eef1ff;display:grid;place-items:center;font-size:25px;font-weight:900;color:#5b7cff}.grade-kicker{display:block;color:#8390a2;font-size:11px;margin-top:16px}.modern-grade-card p{color:#768397;font-size:13px}.grade-footer{display:flex;justify-content:space-between;margin-top:18px;padding-top:14px;border-top:1px solid #eef1f5}.skill-strip{max-width:1150px;margin:20px auto 70px;display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.skill-strip>div{background:#fff;border:1px solid #e7ebf2;border-radius:18px;padding:18px;text-align:center}.skill-strip span{font-size:28px}.skill-strip b{display:block}.skill-strip small{color:#8a96a6}.instrument-showcase{max-width:1240px;margin:70px auto;padding:35px;border-radius:28px;background:#172238;color:#fff;display:grid;grid-template-columns:.75fr 1.25fr;gap:25px;align-items:center}.instrument-copy h2{font-size:38px}.instrument-copy p{color:#c7d1df}.instrument-copy a{display:inline-block;background:#fff;color:#172238;padding:12px 16px;border-radius:12px;font-weight:900}.instrument-images{display:grid;grid-template-columns:1fr 1fr;gap:12px}.instrument-images img{width:100%;height:300px;object-fit:cover;border-radius:20px}.lesson-feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.lesson-feature-grid article{background:#fff;border:1px solid #e7ebf2;border-radius:20px;padding:22px}.lesson-feature-grid i{font-style:normal;color:#5b7cff;font-size:12px;font-weight:900}.lesson-feature-grid p{color:#778497}.lessons-modern-head{max-width:1240px;margin:36px auto 0;padding:28px 32px;background:#fff;border:1px solid #e7ebf2;border-radius:22px;display:flex;justify-content:space-between;align-items:center}.lessons-modern-head h1{font-size:36px}.semester-switch{display:flex;gap:7px}.semester-switch a{padding:10px 13px;border-radius:10px;background:#f2f4f8}.semester-switch a.active{background:#5b7cff;color:#fff}.modern-lessons-grid{max-width:1240px;margin:22px auto 65px;display:grid;grid-template-columns:repeat(3,1fr);gap:16px;padding:0 24px}.modern-lesson-card{background:#fff;border:1px solid #e7ebf2;border-radius:20px;overflow:hidden}.lesson-cover-wrap{position:relative;height:205px}.lesson-cover-wrap img{width:100%;height:100%;object-fit:cover}.lesson-type,.lesson-number{position:absolute;top:12px;padding:6px 9px;border-radius:999px;font-size:10px;font-weight:900}.lesson-type{right:12px;background:#fff}.lesson-number{left:12px;background:#172238;color:#fff}.lesson-card-body{padding:18px}.lesson-card-body p{color:#758296}.lesson-meta{display:flex;gap:8px;flex-wrap:wrap}.lesson-meta span{background:#f5f7fa;border-radius:8px;padding:6px 8px;font-size:10px}.student-dashboard-head{max-width:1200px;margin:34px auto 18px;background:linear-gradient(135deg,#5b7cff,#735ff1);color:#fff;border-radius:26px;padding:30px;display:flex;justify-content:space-between}.progress-card{display:flex;align-items:center;gap:14px;background:#ffffff13;padding:15px;border-radius:18px}.progress-circle{--p:0;width:68px;height:68px;border-radius:50%;background:conic-gradient(#fff calc(var(--p)*1%),#ffffff32 0);display:grid;place-items:center;position:relative}.progress-circle:before{content:"";position:absolute;width:52px;height:52px;border-radius:50%;background:#6c69ee}.progress-circle b{position:relative}.student-quick-actions{max-width:1200px;margin:0 auto 24px;display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.student-quick-actions a{background:#fff;border:1px solid #e7ebf2;border-radius:18px;padding:18px}.student-course-section{max-width:1200px;margin:0 auto 65px}.student-course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.student-course-card{background:#fff;border:1px solid #e7ebf2;border-radius:18px;overflow:hidden}.student-course-card img{width:100%;height:170px;object-fit:cover}.student-course-card>div{padding:16px}.modern-footer{background:#172238;color:#b8c2d0;padding:28px 5vw;display:flex;justify-content:space-between;align-items:center}.footer-brand{display:flex;gap:10px}.footer-brand>span{font-size:30px;color:#a8b6ff}.footer-links{display:flex;gap:18px}@media(max-width:980px){.modern-topbar{height:auto;flex-wrap:wrap}.modern-nav{order:3;width:100%;overflow:auto;justify-content:flex-start}.modern-hero,.instrument-showcase{grid-template-columns:1fr}.modern-grade-grid{grid-template-columns:repeat(2,1fr)}.modern-lessons-grid,.student-course-grid{grid-template-columns:repeat(2,1fr)}.lesson-feature-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:640px){.modern-hero{padding:24px 16px}.hero-metrics{grid-template-columns:repeat(2,1fr)}.modern-grade-grid,.skill-strip,.modern-lessons-grid,.student-course-grid,.lesson-feature-grid{grid-template-columns:1fr}.lessons-modern-head,.student-dashboard-head{display:block;margin:18px 14px}.semester-switch{margin-top:16px}.student-quick-actions{grid-template-columns:1fr;margin:0 14px 20px}.student-course-section{padding:0 14px}.modern-footer{display:grid;gap:14px}}

/* ========================
   V12 MUSIC LAB
   ======================== */
.music-lab-hero{max-width:1280px;margin:30px auto 0;background:linear-gradient(135deg,#17264b,#293f78);color:#fff;border-radius:28px;padding:32px 38px;display:flex;justify-content:space-between;align-items:center}.music-lab-hero span{color:#9eb8ff;font-size:11px;letter-spacing:.15em;font-weight:900}.music-lab-hero h1{font-size:40px;margin:7px 0}.music-lab-hero p{color:#d2dcf3}.lab-tags{display:flex;gap:8px;flex-wrap:wrap}.lab-tags b{background:#ffffff12;border:1px solid #ffffff18;border-radius:999px;padding:9px 12px;font-size:12px}
.music-lab-layout{max-width:1280px;margin:18px auto 60px;display:grid;grid-template-columns:105px 1fr;min-height:720px;background:#101b34;border-radius:27px;overflow:hidden;box-shadow:0 26px 60px #17264b18}.lab-menu{background:#111c35;padding:15px 9px;display:flex;flex-direction:column;gap:9px}.lab-menu button{min-height:88px;border:1px solid #ffffff12;background:#1b2b4a;color:#d9e3f9;border-radius:15px;font-size:25px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;cursor:pointer}.lab-menu button span{font-size:12px;font-weight:800}.lab-menu button.active{background:linear-gradient(135deg,#5577ff,#745cef);color:#fff;box-shadow:0 12px 30px #5d6fff3b}.lab-main{padding:22px;min-width:0}.lab-panel{display:none}.lab-panel.active{display:block}.lab-panel-head{display:flex;justify-content:space-between;align-items:center;color:#fff;background:#172743;padding:18px 20px;border-radius:18px;margin-bottom:16px}.lab-panel-head span{font-size:10px;color:#95b0ff;letter-spacing:.13em}.lab-panel-head h2{margin:4px 0;font-size:27px}.lab-panel-head p{margin:0;color:#aebed7;font-size:12px}.lab-panel-head strong{background:#0f372e;color:#83e4b3;border:1px solid #24634e;padding:9px 12px;border-radius:999px;font-size:12px}
.piano-photo-card{height:280px;overflow:hidden;border-radius:20px;background:#050a12}.piano-photo-card img{width:100%;height:100%;object-fit:cover;object-position:center 55%}
.clear-keyboard{height:260px;background:#080d16;border:10px solid #1c2941;border-radius:18px;position:relative;margin-top:14px;overflow:hidden}.white-keys{display:flex;height:100%}.clear-white{flex:1;border:1px solid #b8c0cc;background:linear-gradient(#fff,#f7f7f8 73%,#e6e7eb);border-radius:0 0 7px 7px;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;padding-bottom:13px;position:relative;z-index:1;cursor:pointer}.clear-white span{font-weight:900;color:#172238}.clear-white small{font-size:10px;color:#8994a4}.clear-white.played{background:linear-gradient(#dfeeff,#cce2ff);box-shadow:inset 0 0 0 3px #5c92ff}.black-keys{position:absolute;inset:0;pointer-events:none}.clear-black{position:absolute;top:0;height:61%;width:3.05%;background:linear-gradient(90deg,#222,#020204 55%,#252525);border:1px solid #000;border-radius:0 0 5px 5px;z-index:4;pointer-events:auto;cursor:pointer;left:calc((var(--slot) + 1) * (100% / 21) - 1.53%)}.clear-black.played{background:#315ba1;box-shadow:0 0 0 2px #6aa4ff}.note-readout{display:flex;align-items:center;gap:10px;background:#172743;color:#b6c5dd;border-radius:14px;padding:12px 16px;margin-top:12px}.note-readout b{color:#8fb6ff;font-size:20px}.note-readout small{margin-right:auto}
.drum-stage-pro{position:relative;max-width:950px;margin:auto;border-radius:22px;overflow:hidden;background:#070b12}.drum-stage-pro>img{width:100%;display:block}.drum-map-pro{position:absolute;inset:0;width:100%;height:100%;z-index:4}.drum-map-pro ellipse{fill:transparent;stroke:transparent;stroke-width:5;cursor:pointer}.drum-map-pro ellipse:hover{fill:#5c8fff16;stroke:#84b5ff77}.drum-map-pro ellipse.hit{fill:#67a3ff2e;stroke:#9ac6ff}.drumstick{position:absolute;width:12px;height:245px;border-radius:10px;background:linear-gradient(90deg,#c68438,#f7d18f,#a96b29);box-shadow:0 4px 10px #0007;z-index:6;transform-origin:50% 95%;pointer-events:none;bottom:-40px}.stick-left{left:39%;transform:rotate(-20deg)}.stick-right{right:39%;transform:rotate(20deg)}.drumstick.strike{animation:stickHit .22s ease-out}.stick-left.strike{--rot:-12deg}.stick-right.strike{--rot:12deg}@keyframes stickHit{0%{transform:translate(0,0) rotate(var(--rot));}45%{left:var(--tx);top:var(--ty);bottom:auto;transform:translate(-50%,-85%) rotate(var(--rot));}100%{transform:translate(-50%,-90%) rotate(var(--rot));}}
.hit-pulse{position:absolute;width:70px;height:70px;border-radius:50%;transform:translate(-50%,-50%);background:radial-gradient(circle,#8fc3ff88,transparent 68%);z-index:5;opacity:0;pointer-events:none}.hit-pulse.show{animation:pulseHit .3s}@keyframes pulseHit{0%{opacity:1;scale:.5}100%{opacity:0;scale:1.5}}
.drum-pads{display:grid;grid-template-columns:repeat(8,1fr);gap:7px;margin-top:12px}.drum-pads button{background:#1a2a49;border:1px solid #31466d;color:#dce7f9;border-radius:11px;padding:11px 5px;cursor:pointer}.drum-pads button:active{background:#5b7cff}
.string-instrument-card{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:center;max-width:1000px;margin:auto;background:#172743;border-radius:22px;padding:20px}.string-instrument-card img{width:100%;max-height:520px;object-fit:contain;border-radius:17px}.string-controls{display:grid;gap:10px}.string-controls button{min-height:56px;border:1px solid #3a527d;border-radius:13px;background:linear-gradient(90deg,#1b2e50,#253b66);color:#fff;font-weight:900;text-align:right;padding:0 18px;cursor:pointer;position:relative;overflow:hidden}.string-controls button:before{content:"";position:absolute;right:0;left:0;top:50%;height:2px;background:#d8c48f66}.string-controls button.pluck{background:#5b7cff;transform:translateX(-4px)}.bass-card{background:linear-gradient(135deg,#172743,#2b214d)}
/* Kid-friendly lesson */
.kid-lesson-hero{max-width:1200px;margin:28px auto;display:grid;grid-template-columns:1.05fr .75fr;gap:24px;align-items:center;background:linear-gradient(135deg,#5a70f4,#8a5ae8);color:#fff;border-radius:28px;padding:30px;overflow:hidden}.kid-badge{display:inline-flex;background:#ffffff1c;border:1px solid #ffffff24;padding:7px 12px;border-radius:999px;font-size:11px;font-weight:900}.kid-hero-copy h1{font-size:44px;margin:12px 0}.kid-hero-copy>p{font-size:17px;color:#f0efff;line-height:1.8}.kid-lesson-hero>img{width:100%;border-radius:20px;background:#fff}.kid-route{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:20px}.kid-route span{background:#ffffff18;padding:8px 11px;border-radius:10px;font-weight:900;font-size:12px}.kid-route i{opacity:.6}
.kid-lesson-wrap{max-width:980px;margin:0 auto 60px;display:grid;gap:18px}.kid-card,.kid-quiz{background:#fff;border:1px solid #e6eaf2;border-radius:22px;padding:26px;box-shadow:0 12px 32px #24304c0b;position:relative}.kid-step{position:absolute;left:22px;top:22px;width:42px;height:42px;border-radius:13px;color:#fff;display:grid;place-items:center;font-weight:900}.kid-step.purple{background:#7d63f2}.kid-step.blue{background:#4d8dff}.kid-step.orange{background:#ff9a4d}.kid-step.green{background:#31bb82}.kid-card-title{display:flex;align-items:center;gap:12px;padding-left:55px}.kid-card-title>span{font-size:30px}.kid-card-title small{display:block;color:#8a96a8;font-size:10px;font-weight:900}.kid-card-title h2{margin:3px 0;font-size:24px}.kid-reading{color:#3f4e63;line-height:2.05;font-size:17px;background:#fafbfe;border-radius:15px;padding:16px;margin-top:16px}.kid-tip{background:#eef5ff;color:#4f6b93;padding:11px 13px;border-radius:12px}.staff-toolbar{display:flex;gap:8px;align-items:center;margin:14px 0}.staff-toolbar button{border:0;border-radius:11px;padding:10px 14px;font-weight:900;cursor:pointer}.staff-toolbar button:first-child{background:#4f83ff;color:#fff}.staff-toolbar button:nth-child(2){background:#eef1f5}.staff-toolbar span{margin-right:auto;color:#7c8796;font-size:12px}.interactive-staff{border:1px solid #e2e7ee;border-radius:18px;overflow:hidden;background:#fff}.interactive-staff svg{display:block;width:100%}.staff-note{cursor:pointer;outline:none}.staff-note ellipse,.staff-note line{fill:#19263c;stroke:#19263c}.staff-note text{fill:#68778c}.staff-note:hover ellipse,.staff-note.active ellipse{fill:#5b7cff}.staff-note:hover line,.staff-note.active line{stroke:#5b7cff}.staff-note.active text{fill:#5b7cff;font-weight:900}.staff-now{display:flex;gap:8px;justify-content:center;margin-top:9px}.staff-now b{color:#5b7cff}.listen-example{display:flex;align-items:center;gap:15px;background:#f4f7fb;border-radius:14px;padding:13px;margin-top:14px}.listen-example>div{min-width:230px}.listen-example small{display:block;color:#8995a6;margin-top:4px}.listen-example audio{flex:1}.open-lab{display:inline-block;background:#172743;color:#fff;padding:12px 16px;border-radius:11px;font-weight:900}.kid-quiz{background:linear-gradient(180deg,#fff,#fbf9ff)}.kid-question{padding:22px 0;border-top:1px solid #edf0f4}.kid-question:first-of-type{border-top:0}.question-tag{display:inline-block;background:#eeeaff;color:#6d57df;padding:6px 9px;border-radius:999px;font-size:10px;font-weight:900}.kid-question h3{font-size:18px}.kid-choices{display:grid;gap:9px}.kid-choices button{border:1px solid #dfe5ed;background:#fff;border-radius:13px;padding:13px;display:flex;align-items:center;gap:11px;text-align:right;cursor:pointer}.kid-choices i{width:20px;height:20px;border:2px solid #a3afbd;border-radius:50%}.kid-choices button.selected{background:#f0f3ff;border-color:#6f7cff}.kid-choices button.selected i{border:6px solid #6f7cff}.kid-question textarea{width:100%;min-height:105px;border:1px solid #dfe5ed;border-radius:13px;padding:13px}.send-text{background:#6c63ef;color:#fff;border:0;border-radius:10px;padding:10px 14px;margin-top:8px}.finish-card{border-right:5px solid #ffc857}.home-task{background:#fff9e8;border:1px solid #f2e2a8;border-radius:14px;padding:13px;margin-top:15px}.home-task p{margin:5px 0;color:#5f5c4d}.kid-complete{text-align:center}.kid-complete button{border:0;background:linear-gradient(135deg,#30bd7f,#1d9f66);color:#fff;border-radius:14px;padding:15px 24px;font-weight:900;font-size:15px;box-shadow:0 12px 24px #23a86d27}
@media(max-width:900px){.music-lab-layout{grid-template-columns:1fr;margin:12px}.lab-menu{flex-direction:row;overflow:auto}.lab-menu button{min-width:92px;min-height:72px}.piano-photo-card{height:200px}.clear-keyboard{height:190px;overflow-x:auto}.drum-pads{grid-template-columns:repeat(4,1fr)}.string-instrument-card{grid-template-columns:1fr}.kid-lesson-hero{grid-template-columns:1fr;margin:16px}.kid-hero-copy h1{font-size:34px}.listen-example{display:block}.listen-example audio{width:100%;margin-top:10px}.kid-lesson-wrap{padding:0 14px}}

/* V13 fixes */
.kid-choices button.correct-answer{background:#eaf9ef!important;border-color:#38ad6b!important;color:#146a3d!important}.kid-choices button.correct-answer i{border:6px solid #38ad6b!important}.kid-choices button.wrong-answer{background:#fff0f0!important;border-color:#df6666!important;color:#9f3535!important}.kid-choices button.wrong-answer i{border:6px solid #df6666!important}.feedback.ok{background:#eaf9ef;color:#167746;border-radius:10px;padding:10px 12px}.feedback.no{background:#fff0f0;color:#a23b3b;border-radius:10px;padding:10px 12px}
.real-string-stage{position:relative;max-width:760px;margin:auto;background:#101a2f;border-radius:22px;overflow:hidden;box-shadow:0 20px 50px #0003}.real-string-stage>img{display:block;width:100%;height:auto}.string-map{position:absolute;inset:0;width:100%;height:100%;z-index:5}.string-map line{stroke:transparent;stroke-width:24;cursor:pointer;pointer-events:stroke}.string-map line:hover{stroke:#7ac8ff33}.string-map line.active{stroke:#7ac8ff88}.bass-map line{stroke-width:30}.pluck-indicator{position:absolute;width:70px;height:70px;border-radius:50%;transform:translate(-50%,-50%);pointer-events:none;background:radial-gradient(circle,#7ed0ff88,transparent 68%);opacity:0;z-index:4}.pluck-indicator.show{animation:pluckPulse .35s ease-out}@keyframes pluckPulse{0%{opacity:1;scale:.5}100%{opacity:0;scale:1.6}}
.drumstick{transition:none}.drumstick.strike2{animation:realStick .22s ease-out}@keyframes realStick{0%{transform:translate(-50%,-10%) rotate(30deg)}45%{transform:translate(-50%,-78%) rotate(4deg)}100%{transform:translate(-50%,-92%) rotate(-8deg)}}

.admin-v14{display:grid;grid-template-columns:240px 1fr;min-height:calc(100vh - 80px);background:#f5f7fb}.admin-v14-nav{background:#111f35;color:#fff;padding:24px 16px;display:flex;flex-direction:column;gap:7px}.admin-v14-nav a{padding:12px 13px;border-radius:11px;color:#d7e1ee}.admin-v14-nav a:hover{background:#ffffff12}.admin-v14-main{padding:28px;min-width:0}.admin-notice{background:#e8f8ee;color:#187544;padding:12px 15px;border-radius:12px;margin-bottom:15px}.admin-head span{color:#5b7cff;font-size:11px;letter-spacing:.14em;font-weight:900}.admin-head h1{font-size:34px;margin:6px 0}.admin-head p{color:#758296}.admin-v14-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.admin-v14-stats div{background:#fff;border:1px solid #e5eaf1;border-radius:18px;padding:22px}.admin-v14-stats b{display:block;font-size:34px;color:#5b7cff}.bank-filters{display:flex;gap:8px;background:#fff;padding:12px;border-radius:16px;margin-bottom:16px}.bank-filters select,.bank-filters button{padding:10px;border:1px solid #dce3eb;border-radius:9px}.bank-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.bank-card{background:#fff;border:1px solid #e4e9f0;border-radius:19px;padding:20px}.bank-card-top{display:flex;justify-content:space-between}.bank-card-top span{color:#5b7cff;font-weight:900}.bank-example{background:#f8f9fc;border-radius:12px;padding:11px;font-size:12px;line-height:1.7}.bank-card audio{width:100%;margin-top:10px}.publish-box{display:grid;grid-template-columns:repeat(3,1fr);gap:7px;border-top:1px solid #edf0f4;margin-top:12px;padding-top:12px}.publish-box label{font-size:11px}.publish-box select,.publish-box input[type=number]{width:100%;padding:7px}.replace-check,.publish-box button{grid-column:1/-1}.publish-box button{background:#17243b;color:#fff;border:0;border-radius:10px;padding:10px}.admin-table-wrap{overflow:auto;background:#fff;border-radius:16px}.admin-table-wrap table{width:100%;border-collapse:collapse}.admin-table-wrap th,.admin-table-wrap td{padding:12px;border-bottom:1px solid #edf0f4}.inline{display:inline}.delete{background:#ffe8e8!important;color:#a83f3f!important}.instrument-library-grid,.student-instrument-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.instrument-library-grid article,.student-instrument-grid article{background:#fff;border:1px solid #e3e9f0;border-radius:18px;overflow:hidden}.instrument-library-grid img,.student-instrument-grid img{width:100%;height:200px;object-fit:cover}.instrument-library-grid article>div,.student-instrument-grid article{padding-bottom:12px}.instrument-library-grid article>div>*{margin-left:14px;margin-right:14px}.instrument-library-grid audio,.student-instrument-grid audio{width:calc(100% - 28px);margin:0 14px}.student-instrument-grid article>*:not(img){margin-left:14px;margin-right:14px}.user-create{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;background:#fff;padding:14px;border-radius:15px}.user-create input,.user-create select{padding:9px}.settings-v14{max-width:700px;background:#fff;padding:20px;border-radius:18px;display:grid;gap:12px}.settings-v14 label{display:grid;gap:6px}.settings-v14 input,.settings-v14 textarea{padding:10px}
@media(max-width:950px){.admin-v14{grid-template-columns:1fr}.admin-v14-nav{flex-direction:row;overflow:auto}.admin-v14-nav h2{display:none}.bank-grid,.instrument-library-grid,.student-instrument-grid{grid-template-columns:1fr}.admin-v14-stats{grid-template-columns:repeat(2,1fr)}.user-create{grid-template-columns:1fr}}

/* ============================== V15 REFERENCE DASHBOARD ============================== */
.v15-body{background:#eaf6ff;color:#0a2548;font-family:Tahoma,Arial,sans-serif}.v15-topbar{height:82px;background:linear-gradient(180deg,#07294e,#061f3e);color:#fff;display:flex;align-items:center;gap:18px;padding:0 22px;position:sticky;top:0;z-index:200;box-shadow:0 8px 26px #00162d40}.v15-logo{display:flex;align-items:center;gap:10px;min-width:300px}.v15-clef{font-size:53px;color:#ffd051;line-height:1}.v15-logo strong{display:block;font-size:19px}.v15-logo small{display:block;color:#c9d7e7;font-size:10px;margin-top:3px}.v15-search{display:flex;align-items:center;width:310px;height:43px;border:1px solid #236398;border-radius:24px;background:#0a3159;overflow:hidden}.v15-search input{flex:1;background:transparent;border:0;color:#fff;padding:0 16px;outline:0}.v15-search input::placeholder{color:#b6cbdd}.v15-search button{width:48px;height:100%;background:transparent;border:0;color:#fff;font-size:24px}.v15-topnav{display:flex;align-self:stretch;justify-content:center;flex:1;gap:8px}.v15-topnav a{min-width:67px;padding:12px 10px 8px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#e2edf7;border-bottom:3px solid transparent;font-size:11px}.v15-topnav i{font-style:normal;font-size:24px;margin-bottom:4px}.v15-topnav a.active,.v15-topnav a:hover{color:#27a8ff;border-color:#20a5ff;background:#ffffff05}.v15-user-area{display:flex;align-items:center;gap:8px;min-width:205px}.v15-avatar{width:45px;height:45px;border-radius:50%;display:grid;place-items:center;background:#fff;color:#173b63;border:3px solid #2c90e4;font-weight:900}.v15-user-meta b,.v15-user-meta small{display:block}.v15-user-meta small{color:#c5d6e7;font-size:10px}.v15-bell{color:#ff3f5c}.v15-logout{color:#fff}.v15-login{background:#148eff;padding:10px 15px;border-radius:12px;color:#fff}.v15-shell{display:grid;grid-template-columns:190px minmax(0,1fr);min-height:calc(100vh - 82px)}.v15-sidebar{background:linear-gradient(180deg,#08294e,#071d39);padding:14px 10px;color:#fff;display:flex;flex-direction:column;gap:4px;min-height:calc(100vh - 82px)}.v15-sidebar>a{display:flex;align-items:center;gap:12px;padding:12px 13px;border-radius:10px;color:#e7f1fa;font-size:13px}.v15-sidebar>a i{width:27px;text-align:center;font-style:normal;font-size:20px}.v15-sidebar>a.active,.v15-sidebar>a:hover{background:linear-gradient(90deg,#1598ff,#086be9);box-shadow:0 0 18px #159aff88}.v15-level-card{margin-top:auto;border:1px solid #1e6095;border-radius:15px;padding:15px;background:#0a3158;text-align:center}.v15-level-card>span{font-size:31px}.v15-level-card small,.v15-level-card b{display:block}.v15-level-card b{font-size:18px;margin:5px 0}.level-bar{height:9px;background:#143e66;border-radius:20px;overflow:hidden;margin:9px 0}.level-bar i{display:block;height:100%;background:linear-gradient(90deg,#00a5ff,#40d4ff)}.v15-level-card em{font-style:normal}.v15-side-mascot{margin-top:12px;padding:16px;border-radius:15px;background:linear-gradient(145deg,#082a52,#0f4880);text-align:center;line-height:1.6}.v15-side-mascot span{display:block;font-size:32px}.v15-content{padding:10px 12px 30px;min-width:0}.v15-footer{background:#08294e;color:#fff;margin:0;display:flex;justify-content:center;gap:25px;padding:17px;font-size:17px}.v15-footer span{color:#ffd34f}
.ref-dashboard{display:grid;grid-template-columns:1.38fr .95fr .95fr;gap:10px;max-width:1420px;margin:auto}.ref-hero{grid-column:1/3;min-height:184px;background:linear-gradient(120deg,#083f75,#0e5b9d);border:1px solid #1986d0;border-radius:17px;color:#fff;display:grid;grid-template-columns:300px 1fr 210px;overflow:hidden;box-shadow:0 8px 18px #09518122}.ref-hero-img{overflow:hidden;background:#082e59}.ref-hero-img img{width:100%;height:100%;object-fit:cover;object-position:left center}.ref-hero-copy{padding:18px 22px;text-align:center}.ref-hero-copy h1{font-size:37px;margin:3px 0;color:#fff}.ref-hero-copy p{margin:0 0 13px;color:#d5e8fa;font-size:17px}.ref-hero-actions{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.ref-hero-actions a{border-radius:15px;padding:12px 5px;color:#fff;display:grid;gap:3px;font-size:20px;box-shadow:inset 0 0 0 1px #ffffff44}.ref-hero-actions b{font-size:13px}.ref-hero-actions .listen{background:linear-gradient(#1dc892,#00a36f)}.ref-hero-actions .learn{background:linear-gradient(#5da8ff,#3975ed)}.ref-hero-actions .train{background:linear-gradient(#ffc342,#f29a13)}.ref-hero-actions .create{background:linear-gradient(#ff6c9b,#ed3f78)}.ref-quote{display:flex;flex-direction:column;justify-content:center;padding:16px;text-align:center;background:#073763}.ref-quote blockquote{font-size:17px;line-height:1.7;margin:0}.ref-quote small{color:#ffcd55;margin-top:14px}.ref-progress{grid-column:3;grid-row:1;background:linear-gradient(145deg,#093868,#0b4e8c);border:1px solid #1783c8;border-radius:17px;color:#fff;padding:15px;display:grid;grid-template-columns:115px 1fr;align-items:center}.ref-progress h3{grid-column:1/-1;margin:0 0 8px;font-size:15px}.progress-ring{--p:65;width:104px;height:104px;border-radius:50%;background:conic-gradient(#35df89 calc(var(--p)*1%),#149dff 0 75%,#173c65 0);display:grid;place-items:center;position:relative}.progress-ring:before{content:"";position:absolute;inset:12px;border-radius:50%;background:#0b3968}.progress-ring b{z-index:2;font-size:22px}.ref-progress ul{list-style:none;padding:0;margin:0}.ref-progress li{display:grid;grid-template-columns:23px 1fr auto;gap:4px;padding:5px 0;font-size:11px}.ref-progress>a{grid-column:1/-1;background:linear-gradient(#159dff,#0877ed);text-align:center;color:#fff;border-radius:11px;padding:10px;font-weight:900;margin-top:7px}.dash-card{background:#fff;border:1px solid #b8d7ee;border-radius:16px;overflow:hidden;box-shadow:0 5px 15px #0b4f7b16}.dash-card>header{height:42px;background:linear-gradient(180deg,#0c3764,#0a2b50);color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 13px}.dash-card>header h2{font-size:14px;margin:0}.dash-card>header a,.dash-card>header span{font-size:10px;color:#cce4f8}.dash-piano{grid-column:1}.piano-visual>img{width:100%;height:190px;object-fit:cover;object-position:center 51%;display:block}.mini-piano{height:100px;display:flex;padding:0 8px 8px;background:#0b2139;direction:ltr}.mini-piano button{flex:1;background:linear-gradient(#fff,#eef1f5);border:1px solid #adb9c5;border-radius:0 0 4px 4px;position:relative;cursor:pointer}.mini-piano button:nth-child(2n):after{content:"";position:absolute;width:52%;height:54%;background:#080b0e;top:0;right:-26%;z-index:2;border-radius:0 0 3px 3px}.mini-piano button span{position:absolute;bottom:5px;font-size:9px;left:50%;transform:translateX(-50%)}.mini-piano button.hit{background:#8bc8ff}.dash-controls{min-height:42px;background:#0d3158;color:#d9eafa;display:flex;align-items:center;gap:9px;padding:7px 10px;font-size:10px}.dash-controls button{margin-right:auto;background:#0a895f;color:#fff;border:0;border-radius:8px;padding:7px 10px}.dash-controls span{padding:6px 14px;border-radius:7px;background:#123d68}.dash-controls span.active{background:#168eff}.dash-controls b{margin-right:auto}.dash-drums{grid-column:2}.mini-drum{height:290px;position:relative;background:#070e16;overflow:hidden}.mini-drum img{width:100%;height:100%;object-fit:cover}.mini-drum button{position:absolute;width:72px;height:54px;border-radius:50%;transform:translate(-50%,-50%);background:transparent;border:0;cursor:pointer}.mini-drum button:hover{box-shadow:0 0 0 3px #5ac8ff99;background:#55bbff18}.dash-staff{grid-column:3}.home-staff{padding:12px;background:#fff}.home-staff svg{width:100%;height:auto}.home-staff line{stroke:#192c45;stroke-width:1.6}.home-staff>svg>text{font-size:92px}.home-staff ellipse{fill:#0f75d8}.home-staff g:nth-of-type(1) ellipse{fill:#f22535}.home-staff g:nth-of-type(2) ellipse{fill:#ff8b18}.home-staff g:nth-of-type(3) ellipse{fill:#ffd51c}.home-staff g:nth-of-type(4) ellipse{fill:#15ae72}.home-staff g:nth-of-type(5) ellipse{fill:#1779e9}.home-staff g:nth-of-type(6) ellipse{fill:#853ee5}.home-staff g:nth-of-type(7) ellipse{fill:#e743a0}.home-staff g{cursor:pointer}.home-staff g line{stroke:currentColor}.home-staff g text{font-size:12px;fill:#263c56}.staff-control{display:flex;justify-content:space-between;padding:9px;background:#eef8ff}.staff-control button{background:#158cff;color:#fff;border:0;border-radius:9px;padding:8px 13px}.dash-ear,.dash-quiz{min-height:220px}.ear-question{text-align:center;padding:14px}.sound-big{font-size:35px;cursor:pointer}.ear-question h3{font-size:13px}.ear-question>div:nth-of-type(2){display:grid;grid-template-columns:1fr 1fr;gap:8px}.ear-question button,.quiz-buttons button{padding:8px;background:#f5fbff;border:1px solid #aad4f4;border-radius:8px}.ear-question p{padding:8px;border-radius:8px;background:#edf7ff}.ear-question p.good,.home-result.good{background:#dff8e8;color:#08743c}.ear-question p.bad,.home-result.bad{background:#ffe5e5;color:#a72b2b}.quiz-staff{font-size:58px;text-align:center;padding:12px;background:#f8fbff}.quiz-staff span{font-size:25px}.dash-quiz h3{text-align:center;font-size:13px}.quiz-buttons{display:grid;grid-template-columns:1fr 1fr;gap:7px;padding:0 12px}.home-result{margin:9px 12px;padding:8px;border-radius:8px;text-align:center;font-size:11px}.ref-categories{grid-column:1/-1}.ref-categories h3{font-size:13px;margin:4px 12px 10px}.ref-categories>div{display:grid;grid-template-columns:repeat(7,1fr);gap:9px}.ref-categories a{min-height:78px;border-radius:13px;padding:13px;color:#0e2541;display:grid;align-content:center;border:1px solid #ffffffaa;box-shadow:0 6px 12px #47647b13}.ref-categories b{font-size:12px}.ref-categories small{font-size:9px;margin-top:5px}.c1{background:linear-gradient(135deg,#e8ffde,#b9f69e)}.c2{background:linear-gradient(135deg,#efdfff,#c994ff)}.c3{background:linear-gradient(135deg,#d7f7ff,#7ed9ef)}.c4{background:linear-gradient(135deg,#fff4db,#ffc77c)}.c5{background:linear-gradient(135deg,#f1dcff,#d69cff)}.c6{background:linear-gradient(135deg,#d9ffe6,#8ceec0)}.c7{background:linear-gradient(135deg,#fff1c8,#ffd171)}.latest-lessons{grid-column:1/3}.latest-lessons h3,.grade-path h3{font-size:13px;margin:2px 5px 8px}.latest-lessons>div{display:grid;grid-template-columns:repeat(6,1fr);gap:8px}.latest-lessons a{background:#0b3158;color:#fff;border-radius:10px;overflow:hidden;min-height:120px;display:grid}.latest-lessons img{width:100%;height:72px;object-fit:cover}.latest-lessons b{font-size:10px;padding:4px 8px}.latest-lessons small{font-size:8px;color:#a9c3da;padding:0 8px 6px}.lesson-fallback{font-size:36px;display:grid;place-items:center}.grade-path{grid-column:3;display:grid;align-content:start;gap:6px}.grade-path h3{margin-bottom:4px}.grade-path a{display:flex;justify-content:space-between;color:#fff;padding:10px 14px;border-radius:8px;font-size:11px;font-weight:900}.grade-path .g2{background:linear-gradient(90deg,#f0b52c,#d98c15)}.grade-path .g3{background:linear-gradient(90deg,#16c2c5,#0b96ac)}.grade-path .g4{background:linear-gradient(90deg,#ff5b8d,#e63465)}.grade-path .g5{background:linear-gradient(90deg,#8161ee,#6842d9)}
@media(max-width:1180px){.v15-search{display:none}.v15-logo{min-width:220px}.ref-dashboard{grid-template-columns:1fr 1fr}.ref-hero{grid-column:1/-1}.ref-progress{grid-column:1/-1;grid-row:auto;grid-template-columns:120px 1fr}.dash-piano,.dash-drums,.dash-staff{grid-column:auto}.dash-staff{grid-column:1/-1}.ref-categories>div{grid-template-columns:repeat(4,1fr)}.latest-lessons{grid-column:1/-1}.grade-path{grid-column:1/-1;grid-template-columns:repeat(4,1fr)}.grade-path h3{grid-column:1/-1}.latest-lessons>div{grid-template-columns:repeat(3,1fr)}}
@media(max-width:800px){.v15-topbar{height:auto;flex-wrap:wrap;padding:10px}.v15-logo{min-width:0}.v15-topnav{order:3;width:100%;overflow:auto;justify-content:flex-start}.v15-topnav a{min-width:63px}.v15-user-area{margin-right:auto;min-width:auto}.v15-user-meta{display:none}.v15-shell{grid-template-columns:1fr}.v15-sidebar{min-height:0;flex-direction:row;overflow:auto;position:sticky;top:145px;z-index:100;padding:7px}.v15-sidebar>a{min-width:92px;justify-content:center}.v15-sidebar>a span{display:none}.v15-level-card,.v15-side-mascot{display:none}.v15-content{padding:7px}.ref-dashboard{grid-template-columns:1fr}.ref-hero{grid-column:1;grid-template-columns:1fr}.ref-hero-img{height:150px}.ref-hero-copy h1{font-size:27px}.ref-quote{display:none}.ref-progress,.dash-piano,.dash-drums,.dash-staff,.dash-ear,.dash-quiz,.latest-lessons,.grade-path,.ref-categories{grid-column:1}.ref-categories>div{grid-template-columns:repeat(2,1fr)}.latest-lessons>div{grid-template-columns:repeat(2,1fr)}.grade-path{grid-template-columns:1fr 1fr}.grade-path h3{grid-column:1/-1}.piano-visual>img{height:150px}.mini-drum{height:250px}}

/* V15.1 accurate piano + matched examples */
.correct-mini-keyboard{position:relative;height:130px;background:#071529;border:7px solid #102847;border-radius:12px;overflow:hidden;margin:8px 10px}.home-white-keys{display:flex;height:100%}.home-white-key{flex:1;border:1px solid #aeb8c7;border-top:0;background:linear-gradient(#fff,#f7f8fa 72%,#e6e9ed);position:relative;z-index:1;border-radius:0 0 4px 4px;padding:0 2px 7px;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;cursor:pointer}.home-white-key b{font-size:11px;color:#16243a}.home-white-key small{font-size:9px;color:#55708d;font-weight:700}.home-white-key em{font-style:normal;font-size:8px;color:#8995a5}.home-white-key.hit{background:#dceaff;box-shadow:inset 0 0 0 2px #4d92ff}.home-black-keys{position:absolute;inset:7px;pointer-events:none}.home-black-key{position:absolute;top:0;height:58%;width:4.15%;left:calc((var(--slot) + 1) * (100% / 14) - 2.075%);background:linear-gradient(90deg,#21252b,#010204 55%,#22262c);border:1px solid #000;border-radius:0 0 4px 4px;z-index:4;pointer-events:auto;cursor:pointer}.home-black-key.hit{background:#3267b8;box-shadow:0 0 0 2px #65adff}.piano-range{font-size:11px;color:#9cc6ff}.home-staff [data-staff-note]{cursor:pointer}.home-staff [data-staff-note].active ellipse{fill:#f3a72d}.home-staff [data-staff-note].active line{stroke:#f3a72d}
.home-correct-examples{grid-column:1/-1;background:#f7fbff;border:1px solid #cfe5f6;border-radius:16px;padding:12px}.section-title-inline{display:flex;align-items:center;justify-content:space-between;margin-bottom:9px}.section-title-inline span{font-size:11px;color:#1781d6;font-weight:900}.section-title-inline h3{margin:2px 0;font-size:16px}.section-title-inline a{font-size:11px;color:#167bca}.home-example-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:9px}.home-example-card{background:#fff;border:1px solid #dde9f3;border-radius:12px;overflow:hidden}.home-example-card img{display:block;width:100%;height:120px;object-fit:contain;background:#fff}.home-example-card>div{padding:8px}.home-example-card b{display:block;font-size:12px}.home-example-card small{display:block;font-size:9px;color:#75869a;margin-top:4px;line-height:1.5}
.examples-hero{max-width:1180px;margin:30px auto 18px;padding:34px;border-radius:24px;background:linear-gradient(135deg,#0c2e5d,#105a9a);color:#fff}.examples-hero span{font-size:11px;letter-spacing:.14em;color:#93d6ff;font-weight:900}.examples-hero h1{font-size:36px;margin:7px 0}.examples-hero p{color:#d8ebfa;line-height:1.8;max-width:760px}.pro-examples-grid,.admin-example-grid{max-width:1180px;margin:0 auto 60px;display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.pro-example-card{background:#fff;border:1px solid #e0e7ef;border-radius:18px;overflow:hidden}.pro-example-img{background:#fff;padding:8px}.pro-example-img img{width:100%;display:block}.pro-example-body{padding:16px}.pro-example-body>span{font-size:10px;color:#5b7cff;font-weight:900}.pro-example-body h3{margin:4px 0 7px;font-size:20px}.pro-example-body p{color:#68778b;font-size:12px;line-height:1.7}.pro-example-body audio{width:100%;margin-top:8px}.admin-example-grid{max-width:none;margin-bottom:20px}
@media(max-width:900px){.home-example-grid{grid-template-columns:repeat(2,1fr)}.pro-examples-grid,.admin-example-grid{grid-template-columns:1fr;padding:0 14px}.correct-mini-keyboard{overflow-x:auto}.home-white-keys{min-width:720px}.home-black-keys{min-width:706px}.examples-hero{margin:16px}.section-title-inline{align-items:flex-start;gap:8px}}

/* V15.2 — Correct piano geometry and direction */
.correct-full-piano,
.correct-mini-keyboard,
.white-keys,
.home-white-keys,
.black-keys,
.home-black-keys{
  direction:ltr !important;
}
.correct-full-piano{
  direction:ltr!important;
  height:300px;
  overflow:visible;
  border:12px solid #111c2d;
  border-top-width:18px;
  background:#05090f;
}
.correct-full-piano .white-keys{
  direction:ltr!important;
  display:flex;
  width:100%;
  height:100%;
}
.correct-full-piano .clear-white{
  flex:0 0 calc(100% / 21);
  width:calc(100% / 21);
  min-width:0;
  direction:ltr!important;
  padding:0 1px 13px;
  justify-content:flex-end;
}
.correct-full-piano .clear-white .latin-note{
  display:block;
  font-size:15px;
  line-height:1;
  color:#152238;
  font-weight:900;
}
.correct-full-piano .clear-white .arabic-note{
  display:block;
  font-size:11px;
  color:#4f6d8b;
  font-weight:800;
  margin-top:4px;
}
.correct-full-piano .clear-white small{
  display:block;
  font-size:9px;
  margin-top:4px;
  color:#8d98a7;
}
.correct-full-piano .black-keys{
  position:absolute;
  inset:0;
  direction:ltr!important;
  pointer-events:none;
}
.correct-full-piano .clear-black{
  top:0;
  height:61%;
  width:2.85%;
  left:calc((var(--slot) + 1) * (100% / 21) - 1.425%);
  direction:ltr!important;
  display:flex;
  align-items:flex-end;
  justify-content:center;
  padding-bottom:9px;
  color:white;
}
.correct-full-piano .clear-black span{
  font-size:8px;
  color:#d9e6f7;
  writing-mode:vertical-rl;
  transform:rotate(180deg);
  opacity:.9;
}
.correct-full-piano .clear-white.played{
  background:linear-gradient(#e7f2ff,#c9e0ff 72%,#b5d4ff);
  box-shadow:inset 0 0 0 3px #5194ff;
}
.correct-full-piano .clear-black.played{
  background:linear-gradient(90deg,#31598d,#132a49 55%,#31598d);
  box-shadow:0 0 0 2px #63b2ff;
}
.piano-correct-shell{
  background:#0a1423;
  border-radius:22px;
  padding:14px;
  margin-top:14px;
  overflow-x:auto;
}
.piano-correct-shell .correct-full-piano{
  min-width:1050px;
  margin:0;
}
.octave-labels{
  min-width:1050px;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  direction:ltr;
  color:#91abc8;
  font-size:11px;
  padding:0 10px 8px;
  text-align:center;
}
.piano-learning-strip{
  display:grid;
  grid-template-columns:repeat(7,1fr);
  gap:7px;
  margin:12px 0;
}
.piano-learning-strip div{
  background:#f4f7fb;
  border:1px solid #dde5ef;
  border-radius:12px;
  text-align:center;
  padding:9px 4px;
}
.piano-learning-strip b{
  display:block;
  color:#17243a;
  font-size:17px;
}
.piano-learning-strip span{
  display:block;
  color:#5b7cff;
  font-size:11px;
  font-weight:800;
  margin-top:2px;
}
.piano-order-guide{
  direction:ltr;
  display:flex;
  justify-content:space-between;
  gap:12px;
  align-items:center;
  background:#172743;
  color:#c8d6e8;
  border-radius:13px;
  padding:11px 14px;
  margin-top:12px;
  font-size:10px;
  overflow:auto;
}
.piano-order-guide b{
  white-space:nowrap;
  color:#fff;
  letter-spacing:.02em;
}
.note-readout{
  direction:rtl;
}
#noteArabic{
  margin-right:auto;
  color:#8fb6ff;
  font-weight:800;
}

/* Home piano must also remain left-to-right inside Arabic site */
.correct-mini-keyboard,
.correct-mini-keyboard *{
  direction:ltr;
}
.home-white-keys{
  display:flex!important;
  flex-direction:row!important;
}
.home-white-key{
  order:initial!important;
}
@media(max-width:900px){
  .piano-learning-strip{grid-template-columns:repeat(7,minmax(54px,1fr));overflow-x:auto}
  .piano-order-guide{min-width:720px}
}

/* =========================
 V16 CREATIVE MUSIC ACADEMY
========================= */
.v16-body{background:#07192f;color:#fff}
.v16-topbar{height:86px;background:#062449;display:flex;align-items:center;gap:22px;padding:0 30px;border-bottom:1px solid #0b4b86;position:sticky;top:0;z-index:100}
.v16-brand{display:flex;align-items:center;gap:12px;min-width:300px}.v16-logo{font-size:54px;color:#ffd351}.v16-brand strong{display:block;font-size:20px}.v16-brand small{display:block;color:#bdd0e3;font-size:11px}
.v16-search{width:340px;height:42px;border:1px solid #1c5a91;border-radius:24px;display:flex;align-items:center;padding:0 14px;gap:10px;background:#082e57}.v16-search input{flex:1;background:transparent;border:0;outline:0;color:#fff}.v16-search input::placeholder{color:#9fb5ca}
.v16-mainnav{display:flex;gap:7px;flex:1;justify-content:center}.v16-mainnav a{min-width:70px;padding:13px 10px;border-radius:12px;text-align:center;color:#d9e9f6;font-size:20px}.v16-mainnav a span{display:block;font-size:10px;margin-top:4px}.v16-mainnav a.active,.v16-mainnav a:hover{background:#0b60b9;color:#52c6ff;box-shadow:inset 0 -3px 0 #1ba3ff}
.v16-user{display:flex;align-items:center;gap:9px;background:#082c52;border:1px solid #164b78;padding:8px 12px;border-radius:13px}.v16-avatar{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:#fff;color:#0c2c52;font-weight:900}.v16-user b,.v16-user small{display:block}.v16-user small{color:#b3c4d6;font-size:10px}.v16-login{background:#158dff;padding:10px 15px;border-radius:10px}
.v16-shell{display:grid;grid-template-columns:180px 1fr;min-height:calc(100vh - 86px)}.v16-side{background:#082949;border-left:1px solid #144f7f;padding:16px 9px;display:flex;flex-direction:column;gap:8px}.v16-side a{display:flex;align-items:center;gap:10px;padding:14px 12px;border:1px solid #164c79;border-radius:12px;color:#e8f3fb;background:#0a3159}.v16-side a.active,.v16-side a:hover{background:linear-gradient(135deg,#0fb5ff,#166cff);box-shadow:0 0 18px #0ba5ff55}.v16-side a span{font-size:12px}
.v16-content{padding:16px;min-width:0}.v16-hero{height:180px;border-radius:24px;background:linear-gradient(90deg,#051527a8,#08213be6),url('../images/premium_piano_hq.webp') center 55%/cover;position:relative;overflow:hidden;border:1px solid #245886}.hero-overlay{position:absolute;inset:0;padding:30px 36px}.hero-overlay .hero-badge{font-size:10px;color:#6bd0ff;letter-spacing:.15em}.hero-overlay h1{font-size:52px;margin:6px 0;color:#ffd256}.hero-overlay p{font-size:20px;color:#f3f8ff}.hero-actions{position:absolute;left:22px;bottom:22px;display:flex;gap:8px}.hero-actions button{background:#0d3b67cc;border:1px solid #3c74a6;color:#fff;border-radius:10px;padding:10px 14px}
.v16-piano-card,.v16-panel,.v16-metronome{background:#0c2341;border:1px solid #245176;border-radius:20px;box-shadow:0 18px 40px #0004}.v16-piano-card{margin-top:14px;padding:14px}.piano-topline{display:flex;justify-content:space-between;align-items:center;padding:4px 4px 11px}.piano-topline span{color:#99b8d7;font-size:11px}.piano-topline b{display:block;font-size:15px;margin-top:4px}.range-label{background:#082f59;border:1px solid #215a89;border-radius:999px;padding:7px 12px;color:#8cd1ff}
.v16-piano-wrap{direction:ltr!important;background:#081526;border-radius:15px;padding:10px;overflow:auto}.v16-octaves{direction:ltr;display:grid;grid-template-columns:7fr 7fr 7fr 1fr;min-width:1180px;color:#6ca9dd;font-size:11px;text-align:center;margin-bottom:7px}.v16-piano{position:relative;display:flex;min-width:1180px;height:310px;direction:ltr!important;background:#050a12;border:8px solid #0d1725;border-radius:8px;overflow:hidden}.v16-white{flex:0 0 calc(100% / 22);height:100%;background:linear-gradient(#fff,#f7f7f7 72%,#e8ebef);border:1px solid #b9c0c9;border-top:0;position:relative;z-index:1;cursor:pointer}.v16-white .key-label{position:absolute;bottom:10px;left:0;right:0;text-align:center}.v16-white b{display:block;color:#0f2849;font-size:14px}.v16-white span{display:block;color:#4d6f91;font-size:10px;margin-top:2px}.v16-black{position:absolute;top:0;height:62%;width:2.9%;left:calc((var(--slot) + 1) * (100% / 22) - 1.45%);z-index:5;background:linear-gradient(90deg,#282828,#020202 55%,#222);border:1px solid #000;border-radius:0 0 5px 5px;color:#dfeaf6;cursor:pointer;box-shadow:0 6px 8px #0008}.v16-black span{font-size:9px;position:absolute;bottom:12px;left:0;right:0}.v16-white.pressed{background:linear-gradient(#e5f4ff,#c8e4ff);box-shadow:inset 0 0 0 3px #34a4ff}.v16-black.pressed{background:#165da8;box-shadow:0 0 0 2px #63beff}.v16-piano.hide-names .key-label,.v16-piano.hide-names .v16-black span{display:none}.v16-piano.hide-arabic .key-label span{display:none}
.piano-bottom-controls{display:flex;align-items:center;gap:16px;margin-top:11px}.piano-bottom-controls label{background:#092c51;padding:10px 12px;border-radius:10px;font-size:11px}.played-box{margin-right:auto;display:flex;align-items:center;gap:10px;background:#081b31;padding:8px 12px;border-radius:10px}.played-box span{font-size:10px;color:#8db0cf}.played-box b{font-size:22px;color:#7dc5ff}.played-box small{color:#ffd466}
.v16-grid-two{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:14px}.v16-panel{padding:13px}.v16-panel header{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}.v16-panel h2{font-size:17px;margin:0}.v16-panel header span{font-size:10px;color:#81b8e8}.v16-drum-stage{position:relative;background:#07101c;border-radius:14px;overflow:hidden}.v16-drum-stage img{width:100%;display:block}.v16-drum-stage svg{position:absolute;inset:0;width:100%;height:100%;z-index:4}.v16-drum-stage ellipse{fill:transparent;stroke:transparent;stroke-width:5;cursor:pointer}.v16-drum-stage ellipse:hover{fill:#1c9dff18;stroke:#7ecfff88}.v16-stick{position:absolute;width:10px;height:180px;border-radius:8px;background:linear-gradient(90deg,#ad6b2b,#f2d18c,#a76628);z-index:6;bottom:-50px;transform-origin:50% 100%}.left-stick{left:38%;transform:rotate(-18deg)}.right-stick{right:38%;transform:rotate(18deg)}.v16-stick.hit{animation:v16stick .22s ease-out}@keyframes v16stick{0%{transform:translate(-50%,-20%) rotate(24deg)}50%{transform:translate(-50%,-82%) rotate(4deg)}100%{transform:translate(-50%,-92%) rotate(-8deg)}}.drum-mode-row{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin-top:8px}.drum-mode-row button{background:#0a3159;color:#cbe0f2;border:1px solid #24537a;border-radius:8px;padding:7px}.drum-mode-row button.active{background:#168dff}
.v16-staff{background:#fff;border-radius:14px;padding:7px}.v16-staff svg{width:100%;display:block}.v16-staff [data-note]{cursor:pointer}.v16-staff [data-note] ellipse{fill:#3d7ceb}.v16-staff [data-note] line{stroke:#3d7ceb;stroke-width:3}.v16-staff [data-note] text{fill:#26384f;font-size:11px}.v16-staff [data-note].active ellipse{fill:#ff9d2b}.v16-staff [data-note].active line{stroke:#ff9d2b}.staff-actions{display:flex;gap:8px;align-items:center;margin-top:8px}.staff-actions button{background:#0e69c1;color:#fff;border:0;border-radius:9px;padding:8px 10px}.staff-actions b{margin-right:auto;color:#ffd05b}
.v16-learning-cards{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;margin-top:14px}.v16-learning-cards a{background:linear-gradient(135deg,#16385e,#0e2747);border:1px solid #2b628f;border-radius:14px;padding:13px;text-align:center}.v16-learning-cards a:nth-child(1){background:linear-gradient(135deg,#2a9c73,#1c6b55)}.v16-learning-cards a:nth-child(2){background:linear-gradient(135deg,#6e4ae6,#4c359d)}.v16-learning-cards a:nth-child(3){background:linear-gradient(135deg,#1598b4,#0a677d)}.v16-learning-cards a:nth-child(4){background:linear-gradient(135deg,#b47a3e,#85531f)}.v16-learning-cards a:nth-child(5){background:linear-gradient(135deg,#724bc2,#4e2f89)}.v16-learning-cards a:nth-child(6){background:linear-gradient(135deg,#2e9e7f,#1b6b56)}.v16-learning-cards span{font-size:28px}.v16-learning-cards b{display:block;margin-top:6px}.v16-learning-cards small{display:block;color:#d9e7f1;font-size:9px;margin-top:4px}
.v16-metronome{margin-top:14px;padding:12px 15px;display:flex;justify-content:space-between;align-items:center}.v16-metronome>div{display:flex;align-items:center;gap:10px}.v16-metronome button{background:#0a3159;color:#fff;border:1px solid #24537a;border-radius:8px;padding:7px 10px}.v16-metronome strong{min-width:85px;text-align:center;color:#ffd25b}.v16-footer{height:58px;background:#04192f;border-top:1px solid #16436b;display:flex;align-items:center;justify-content:center;gap:10px;color:#b9cbe0}.v16-footer span{font-size:26px;color:#ffd157}
@media(max-width:1100px){.v16-search{display:none}.v16-mainnav a{min-width:55px}.v16-shell{grid-template-columns:90px 1fr}.v16-side a{justify-content:center}.v16-side a span{display:none}.v16-learning-cards{grid-template-columns:repeat(3,1fr)}}
@media(max-width:760px){.v16-topbar{height:auto;flex-wrap:wrap;padding:10px}.v16-brand{min-width:0}.v16-mainnav{order:3;width:100%;overflow:auto}.v16-shell{grid-template-columns:1fr}.v16-side{flex-direction:row;overflow:auto}.v16-side a{min-width:80px}.v16-side a span{display:block}.v16-grid-two{grid-template-columns:1fr}.v16-learning-cards{grid-template-columns:repeat(2,1fr)}.v16-hero{height:160px}.hero-overlay h1{font-size:38px}.hero-actions{position:static;padding:100px 16px 0;overflow:auto}.v16-metronome{display:block}.v16-metronome>div{margin:8px 0}}

/* V16.1 Typography + Rhythm Education */
html,body,button,input,select,textarea{font-family:"Tajawal","Noto Kufi Arabic","Noto Sans Arabic",Tahoma,Arial,sans-serif!important}.v16-brand strong,.hero-overlay h1,.kid-hero-copy h1,.kid-card-title h2,.admin-head h1{font-weight:900;letter-spacing:-.025em}.kid-reading{font-weight:500}.kid-question h3{font-weight:800}.v16-mainnav a span,.v16-side a span{font-weight:700}
.rhythm-reading-lab{border-top:5px solid #ff9f43;background:linear-gradient(180deg,#fff,#fffaf4)}.rhythm-step{background:linear-gradient(135deg,#ff9f43,#f36b3d)}.rhythm-intro b{color:#b44c19}.rhythm-speed-box{display:grid;grid-template-columns:170px 1fr auto;align-items:center;gap:14px;background:#172743;color:#fff;border-radius:15px;padding:14px 16px;margin:16px 0}.rhythm-speed-box label{display:flex;flex-direction:column;font-size:11px;color:#b9cae0}.rhythm-speed-box strong{font-size:19px;color:#ffd266}.rhythm-speed-box input{accent-color:#ff9f43;width:100%}.rhythm-speed-box button{border:1px solid #355675;background:#0d345b;color:#fff;border-radius:10px;padding:10px 13px;font-weight:800}.rhythm-pattern-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.rhythm-pattern{min-height:125px;border:1px solid #e3e8ef;background:#fff;border-radius:15px;padding:13px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;transition:.15s}.rhythm-pattern:hover{transform:translateY(-2px);border-color:#ffb16d}.rhythm-pattern.playing{background:#fff1e4;border-color:#ff8f35;box-shadow:inset 0 0 0 2px #ff9f43}.rhythm-pattern>span{font-family:"Times New Roman",serif!important;font-size:36px;color:#17243a;line-height:1}.rhythm-pattern>b{font-size:18px;color:#e16b20}.rhythm-pattern>small{color:#7b899a}.rhythm-pattern.wide{grid-column:span 2}.rhythm-live-read{display:flex;align-items:center;gap:10px;background:#f4f7fb;border:1px solid #e4eaf1;border-radius:13px;padding:11px 14px;margin-top:12px}.rhythm-live-read b{color:#e46e20;font-size:17px}.rhythm-live-read small{margin-right:auto;color:#8190a3}.kid-question audio{width:min(100%,560px);margin:9px 0}.kid-quiz:before{content:"اختبر نفسك خطوة بخطوة";display:inline-block;background:#eef1ff;color:#5c62dc;padding:7px 11px;border-radius:999px;font-size:10px;font-weight:900;margin-bottom:8px}
@media(max-width:760px){.rhythm-speed-box{grid-template-columns:1fr}.rhythm-pattern-grid{grid-template-columns:repeat(2,1fr)}.rhythm-pattern.wide{grid-column:span 2}.rhythm-live-read{align-items:flex-start;flex-wrap:wrap}.rhythm-live-read small{margin-right:0;width:100%}}

/* V16.2 Admin + worksheets + visual guides */
.v16-logo-img{width:58px;height:58px;object-fit:contain;border-radius:10px;background:#fff}.lesson-tools-bar{max-width:980px;margin:-12px auto 18px;display:flex;gap:8px}.lesson-tools-bar a{background:#fff;border:1px solid #dce5ee;border-radius:10px;padding:9px 12px;color:#315b84;font-weight:800}.lesson-guide-image{display:block;width:min(100%,900px);max-height:560px;object-fit:contain;margin:15px auto 0;border-radius:16px;background:#f7fafc;border:1px solid #e1e8ef}.youtube-frame{aspect-ratio:16/9;border-radius:15px;overflow:hidden;margin-top:14px;background:#111}.youtube-frame iframe{width:100%;height:100%;border:0}.admin-editor-grid{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:16px}.lesson-editor-form{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;background:#fff;border:1px solid #e0e7ef;border-radius:18px;padding:18px}.lesson-editor-form label{display:grid;gap:5px;font-size:11px;font-weight:800}.lesson-editor-form input,.lesson-editor-form textarea,.lesson-editor-form select{padding:9px;border:1px solid #d7e0e9;border-radius:9px;font:inherit}.lesson-editor-form .wide{grid-column:1/-1}.lesson-editor-form .check{display:flex;align-items:center;grid-column:1/-1}.lesson-editor-form .primary{background:#176fd0;color:#fff;border:0;padding:12px;border-radius:10px;font-weight:900}.lesson-list-admin{background:#fff;border:1px solid #e0e7ef;border-radius:18px;padding:14px;max-height:900px;overflow:auto}.lesson-list-admin>div{display:grid;grid-template-columns:70px 1fr auto auto;gap:6px;align-items:center;border-bottom:1px solid #eef2f5;padding:9px 0}.lesson-list-admin span{font-size:9px;color:#7c8998}.lesson-list-admin b{font-size:11px}.lesson-list-admin a{font-size:10px;color:#176fd0}.exercise-admin-box{margin-top:16px;background:#fff;border:1px solid #e0e7ef;border-radius:18px;padding:18px}.exercise-add-form{display:grid;grid-template-columns:1fr 150px 1fr 1fr;gap:8px;margin-bottom:14px}.exercise-add-form input,.exercise-add-form textarea,.exercise-add-form select{padding:8px;border:1px solid #d8e1ea;border-radius:8px}.exercise-add-form button{background:#1a7fe7;color:#fff;border:0;border-radius:8px}.block-form{display:grid;grid-template-columns:1fr 2fr 1fr 1fr 90px auto;gap:8px;background:#fff;padding:14px;border-radius:15px}.block-form input,.block-form textarea{padding:9px;border:1px solid #d8e1ea;border-radius:8px}.block-admin-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:14px}.block-admin-grid article{background:#fff;border:1px solid #e1e8ef;border-radius:14px;padding:14px}.visual-guide-card{border-top:5px solid #29a87c}.youtube-lesson-card{border-top:5px solid #e14c4c}
@media(max-width:950px){.admin-editor-grid{grid-template-columns:1fr}.lesson-editor-form{grid-template-columns:1fr}.lesson-editor-form .wide{grid-column:auto}.exercise-add-form,.block-form{grid-template-columns:1fr}.block-admin-grid{grid-template-columns:1fr}.lesson-tools-bar{padding:0 14px;flex-wrap:wrap}}

/* V16.4 design restore safeguards */
.v16-shell,.v16-content,.v16-piano-card,.kid-card,.admin-panel{box-sizing:border-box}
.v16-logo-img{display:block}
#proPiano,.mini-piano,.correct-mini-keyboard{direction:ltr!important}

/* V16.5 Worksheet Studio */
.ws-admin-page{max-width:1500px;margin:0 auto;padding:24px}.ws-admin-head{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:18px}.ws-admin-head span{font-size:10px;font-weight:900;letter-spacing:.14em;color:#1f78d1}.ws-admin-head h1{font-size:30px;margin:3px 0}.ws-admin-head p{color:#748397;margin:0}.ws-admin-head>a{background:#172b48;color:#fff;padding:10px 14px;border-radius:10px}.admin-msg{background:#eaf8ef;color:#176337;padding:12px;border-radius:10px;margin-bottom:14px}.ws-admin-layout{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:18px}.ws-builder-card,.ws-list-card{background:#fff;border:1px solid #dfe7ef;border-radius:20px;padding:18px}.ws-main-form,.ws-item-add{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.ws-main-form label,.ws-item-add label{display:grid;gap:5px;font-size:11px;font-weight:800}.ws-main-form .full,.ws-item-add .full{grid-column:1/-1}.ws-main-form input,.ws-main-form select,.ws-main-form textarea,.ws-item-add input,.ws-item-add select,.ws-item-add textarea,.ws-item-row input,.ws-item-row select,.ws-item-row textarea{border:1px solid #d3dee9;border-radius:9px;padding:9px;font:inherit;background:#fff}.switch-row{display:flex!important;align-items:center;gap:7px}.primary{background:#1b73cf!important;color:#fff!important;border:0!important;border-radius:9px;padding:11px!important;font-weight:900!important}.section-title{display:flex;justify-content:space-between;align-items:center;gap:10px}.section-title a{background:#eaf3ff;color:#1769bc;padding:8px 10px;border-radius:9px;font-weight:800}.ws-items-manager{border-top:1px solid #e5ebf1;margin-top:22px;padding-top:18px}.ws-item-add{background:#f7fafd;padding:14px;border-radius:14px}.ws-item-row{display:grid;grid-template-columns:110px 2fr 1.3fr 1.3fr 70px 70px 70px 70px;gap:6px;align-items:center;border-top:1px solid #edf1f5;padding:9px 0}.ws-item-row textarea{min-height:55px}.delete{background:#fff0f0!important;color:#c43f3f!important;border:1px solid #f3caca!important;border-radius:8px;padding:8px!important}.ws-list-card{align-self:start}.ws-list-card article{border-top:1px solid #e8edf2;padding:12px 0}.ws-list-card article small{color:#7b8b9d}.ws-list-card article h3{margin:5px 0;font-size:14px}.ws-list-card article p{font-size:11px;color:#738197}.ws-list-card article>div{display:flex;gap:6px;align-items:center}.ws-list-card article a{font-size:10px;background:#eff5fb;padding:7px 9px;border-radius:7px}.ws-list-card article form{margin:0}.muted{color:#8b98a7}.lesson-worksheets-card{border-top:5px solid #5578d8}.lesson-worksheet-links{display:flex;flex-wrap:wrap;gap:9px;margin-top:12px}.lesson-worksheet-links a{background:#edf2ff;color:#3e5db8;padding:10px 13px;border-radius:10px;font-weight:800}.admin-ws-shortcut{max-width:1400px;margin:12px auto;padding:0 20px}.admin-ws-shortcut a{display:inline-block;background:#1b73cf;color:#fff;padding:10px 14px;border-radius:10px;font-weight:900}
@media(max-width:1000px){.ws-admin-layout{grid-template-columns:1fr}.ws-item-row{grid-template-columns:1fr 1fr}.ws-main-form,.ws-item-add{grid-template-columns:1fr}.ws-main-form .full,.ws-item-add .full{grid-column:auto}}@media(max-width:600px){.ws-admin-page{padding:12px}.ws-admin-head{align-items:flex-start;flex-direction:column}.ws-item-row{grid-template-columns:1fr}}