:root{
 --bg:#090b0d;--surface:#101318;--surface2:#15191f;--line:#2a3038;--text:#f8f7f3;
 --muted:#9ca2aa;--gold:#e1ad40;--gold2:#f4c45e;--root:#f4b942;--accent:#4d8cff;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif}
body{min-height:100vh}
button,select{font:inherit}
button{cursor:pointer}
#app{min-height:100vh;padding-bottom:82px}
.app-header{height:70px;display:flex;align-items:center;padding:12px 18px;border-bottom:1px solid #171b20;background:#0b0d10;position:sticky;top:0;z-index:30}
.brand-mini{display:flex;align-items:center;gap:10px}.logo-mark{width:42px;height:42px;border:1px solid var(--gold);border-radius:50%;display:grid;place-items:center;color:var(--gold);font-size:12px;font-weight:800}.brand-mini b{display:block;font-size:11px;letter-spacing:.18em}.brand-mini strong{font-family:Georgia,serif;color:var(--gold2);font-size:20px}
.bottom-nav{position:fixed;bottom:0;left:0;right:0;height:76px;background:#0c0e11;border-top:1px solid var(--line);display:flex;z-index:40;padding-bottom:env(safe-area-inset-bottom)}
.nav{flex:1;border:0;background:none;color:#747b85;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px}.nav span{font-size:21px}.nav small{font-size:11px}.nav.active{color:var(--gold2)}
.screen{max-width:760px;margin:0 auto;padding:24px 18px 28px}
.screen-title{text-align:center;margin:4px 0 24px}.screen-title h1{font-size:34px;margin:4px 0 8px}.screen-title p{color:var(--muted);margin:0}.kicker{color:var(--gold2);font-size:11px;font-weight:800;letter-spacing:.16em}
.tool-list{display:grid;gap:14px}.tool-item{width:100%;display:grid;grid-template-columns:60px 1fr auto;align-items:center;gap:15px;background:linear-gradient(135deg,#15191e,#101318);color:var(--text);border:1px solid var(--line);border-radius:22px;padding:17px;text-align:left}.tool-visual{width:58px;height:58px;border-radius:17px;display:grid;place-items:center;font-size:27px;color:var(--gold2);background:#211d14;border:1px solid #58451f}.tool-copy h2{font-size:21px;margin:0 0 4px}.tool-copy p{font-size:14px;color:var(--muted);line-height:1.35;margin:0}.chev{font-size:32px;color:var(--gold2)}.soon{font-size:10px;color:#6d737c}.tool-item.disabled{opacity:.48;cursor:default}

.instrument-screen{max-width:700px;margin:0 auto;min-height:calc(100vh - 146px);padding:0 18px 22px}
.instrument-top{height:68px;display:grid;grid-template-columns:44px 1fr 44px;align-items:center;border-bottom:1px solid #20252c}.instrument-top h1{text-align:center;font-size:24px;margin:0}.back,.mute{height:44px;width:44px;border:0;background:none;color:var(--text);font-size:34px}.mute{font-size:22px;border:1px solid var(--line);border-radius:50%}.mute.muted{opacity:.35;text-decoration:line-through}
.subdivision-row{display:flex;justify-content:center;gap:14px;padding:26px 0 12px}.sub-btn{width:66px;height:66px;border-radius:50%;border:1px solid #2e343c;background:#12161b;color:#d9dde2;display:flex;flex-direction:column;align-items:center;justify-content:center;box-shadow:0 10px 28px rgba(0,0,0,.18)}.sub-btn.active{background:var(--gold2);color:#15110a;border-color:var(--gold2);box-shadow:0 0 0 5px rgba(225,173,64,.10)}.note-glyph{font-size:28px;line-height:1}.triplet{font-size:17px;letter-spacing:-5px}.sixteenth{font-size:27px}.sub-btn small{font-size:9px;margin-top:3px;opacity:.7}
.tempo-zone{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px 0 20px}.tempo-line{display:grid;grid-template-columns:64px auto 64px;align-items:center;gap:18px}.tempo-step{border:0;background:none;color:#9ca2aa;font-size:62px;font-weight:200;line-height:1}.tempo-number-wrap{text-align:center}.tempo-number{font-size:112px;line-height:.9;font-weight:780;letter-spacing:-.05em}.tempo-label{text-align:center;font-size:20px;margin-top:8px}.tempo-name{color:var(--gold2);font-weight:700;margin-top:12px;font-size:15px}
.pulse-stage{height:170px;display:flex;flex-direction:column;align-items:center;justify-content:center}.pulse-dot{width:34px;height:34px;border-radius:50%;background:var(--gold2);box-shadow:0 0 0 0 rgba(244,196,94,.25);transition:transform .08s,box-shadow .08s}.pulse-dot.hit{transform:scale(1.5);box-shadow:0 0 0 18px rgba(244,196,94,.08)}.beat-dots{display:flex;gap:10px;margin-top:28px}.beat-dots i{width:8px;height:8px;border-radius:50%;background:#343a42}.beat-dots i.on{background:var(--gold2)}
.timer{font-size:24px;font-variant-numeric:tabular-nums;font-weight:700}
.mini-settings{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:0 0 14px}.mini-settings button{background:#11151a;border:1px solid var(--line);color:var(--text);border-radius:15px;padding:12px}.mini-settings small{display:block;color:#777e87;font-size:9px;letter-spacing:.08em}.mini-settings strong{display:block;margin-top:4px;font-size:14px}
.primary-actions{display:grid;grid-template-columns:1fr 130px;gap:10px}.start-btn,.tap-btn{height:68px;border-radius:18px;font-size:22px;font-weight:800}.start-btn{border:0;background:linear-gradient(135deg,#f1bf56,#ce9328);color:#16110a}.start-btn.stop{background:#262c34;color:white;border:1px solid #424a55}.tap-btn{background:#11151a;color:white;border:1px solid #404751}.learning-tip{display:flex;gap:10px;align-items:flex-start;margin-top:16px;background:#11151a;border:1px solid #252b33;border-radius:16px;padding:13px}.learning-tip p{margin:3px 0 0;color:var(--muted);font-size:12px;line-height:1.4}.learning-tip b{font-size:13px}

.scale-selectors{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:18px 0}.scale-selectors label span{display:block;color:var(--muted);font-size:11px;margin-bottom:6px}.scale-selectors select{width:100%;padding:15px 13px;border-radius:15px;border:1px solid var(--line);background:#11151a;color:white}.mode-pills{display:flex;gap:7px;margin-bottom:12px}.mode-pills button{flex:1;border-radius:12px;padding:10px;border:1px solid var(--line);background:#11151a;color:var(--muted)}.mode-pills button.active{background:#2b2417;color:var(--gold2);border-color:#624b20}
.scale-card,.didactic-card{background:linear-gradient(180deg,#15191f,#101318);border:1px solid var(--line);border-radius:20px;padding:16px;margin-bottom:14px}.scale-head{display:flex;justify-content:space-between;gap:10px;align-items:center}.scale-head small,.didactic-card small{color:var(--gold2);font-size:10px;font-weight:800;letter-spacing:.12em}.scale-head h2{margin:3px 0 5px;font-size:24px}.scale-head p{margin:0;color:var(--muted);font-weight:700}.round-play{width:52px;height:52px;border-radius:50%;border:0;background:var(--gold2);color:#15110a;font-size:18px}.shape-switcher{display:grid;grid-template-columns:45px 1fr 45px;align-items:center;margin:18px 0 12px}.shape-switcher strong{text-align:center}.shape-switcher button{border:0;background:none;color:var(--text);font-size:38px}.fret-scroll{overflow-x:auto}.fretboard{min-width:560px;display:grid;grid-template-columns:44px repeat(6,1fr);background:#0d1014;border:1px solid #4c535d;border-radius:12px;overflow:hidden}.fret-label,.fret-cell{height:52px;display:flex;align-items:center;justify-content:center;border-bottom:1px solid #424950}.fret-label{font-size:10px;color:#858c95;background:#0b0d10}.fret-cell{border-left:1px solid #4c535d;background:linear-gradient(90deg,#181b20,#20242a)}.note-dot{width:31px;height:31px;border-radius:50%;border:0;font-size:10px;font-weight:800;color:#fff;background:#606771}.note-dot.root{background:var(--gold2);color:#17110a}.note-dot.chord{background:var(--accent)}.scale-note-line{text-align:center;color:var(--muted);font-size:13px;margin-top:12px}.didactic-card h3{font-size:20px;margin:6px 0}.didactic-card p{color:var(--muted);line-height:1.5}.study-btn{width:100%;border:0;background:#211d14;color:var(--gold2);border:1px solid #5a451f;border-radius:13px;padding:13px;font-weight:800}
.placeholder{text-align:center;color:var(--muted);padding:80px 20px}.placeholder h2{color:white}
@media(max-width:560px){
 .tempo-number{font-size:96px}.tempo-line{grid-template-columns:50px auto 50px;gap:10px}.tempo-step{font-size:54px}
 .subdivision-row{gap:10px}.sub-btn{width:60px;height:60px}.primary-actions{grid-template-columns:1fr 112px}
 .scale-selectors{grid-template-columns:1fr}.app-header{height:64px}
}