:root{--bg:#f6f8fb;--panel:#fff;--text:#182033;--muted:#6c7688;--line:#e2e7ef;--brand:#2563eb;--brand-soft:#eaf1ff;--danger:#b42318;--shadow:0 10px 30px rgba(25,35,60,.08);--font-scale:1}
*{box-sizing:border-box}html{font-size:calc(16px * var(--font-scale))}body{margin:0;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button{cursor:pointer}.app-shell{min-height:100vh;display:grid;grid-template-columns:230px 1fr}.sidebar{position:sticky;top:0;height:100vh;background:var(--panel);border-right:1px solid var(--line);padding:26px 18px}.brand{display:block;font-size:1.35rem;font-weight:800;letter-spacing:-.03em;margin:2px 10px 28px}.sidebar nav{display:flex;flex-direction:column;gap:6px}.sidebar nav a{display:flex;align-items:center;gap:12px;padding:12px 13px;border-radius:11px;color:var(--muted);font-weight:650}.sidebar nav a span{font-size:1.25rem;width:25px;text-align:center}.sidebar nav a.active,.sidebar nav a:hover{background:var(--brand-soft);color:var(--brand)}.bottom-nav{display:none}.content{width:min(1120px,100%);padding:34px 38px 90px;margin:0 auto}.hero{min-height:320px;border-radius:22px;padding:42px;background:linear-gradient(120deg,rgba(14,32,49,.82),rgba(14,32,49,.35)),linear-gradient(135deg,#617b79,#c6a77b);color:#fff;display:flex;align-items:center;box-shadow:var(--shadow)}.hero h1{font-size:clamp(2rem,5vw,3.4rem);line-height:1.02;margin:8px 0 24px;letter-spacing:-.045em}.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-weight:750;font-size:.75rem;opacity:.8}.number-jump{background:#fff;border-radius:12px;padding:6px;display:flex;max-width:410px;box-shadow:0 10px 30px #0002}.number-jump input{border:0;outline:0;padding:12px 13px;flex:1;min-width:0;color:#172033}.number-jump button{border:0;background:#f1f4f8;border-radius:9px;width:44px;font-size:1.2rem}.section{margin-top:28px}.section-head{display:flex;justify-content:space-between;align-items:center}.section h2,.section-head h2{font-size:1.06rem;margin:0 0 13px}.quick-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.quick-grid a{background:var(--panel);border:1px solid var(--line);border-radius:15px;padding:20px 15px;text-align:center;box-shadow:0 4px 14px #19233c08}.quick-grid a b{display:block;font-size:1.7rem;color:var(--brand);margin-bottom:8px}.quick-grid a span{font-size:.86rem;font-weight:650}.searchbox{position:relative}.searchbox>span{position:absolute;left:15px;top:12px;color:var(--muted)}.searchbox input,.search-page input{width:100%;border:1px solid var(--line);background:var(--panel);border-radius:12px;padding:13px 14px 13px 42px;outline:none}.search-results{position:absolute;left:0;right:0;top:52px;background:var(--panel);border:1px solid var(--line);border-radius:13px;box-shadow:var(--shadow);z-index:20;display:none;overflow:hidden}.search-results.open{display:block}.search-results a{display:flex;padding:11px 14px;gap:11px;border-bottom:1px solid var(--line)}.search-results a:last-child{border-bottom:0}.search-results b{width:38px;color:var(--brand)}.page-head{margin-bottom:23px}.page-head h1{font-size:2rem;letter-spacing:-.035em;margin:8px 0}.page-head p{color:var(--muted);margin:0}.back{display:inline-block;color:var(--muted);font-size:.9rem;margin-bottom:8px}.search-page{display:flex;gap:9px;margin-bottom:22px}.search-page input{padding-left:15px}.search-page button{border:0;background:var(--brand);color:white;border-radius:11px;padding:0 22px;font-weight:700}.song-list{display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--line);border-radius:15px;overflow:hidden}.song-list>a{display:grid;grid-template-columns:58px 1fr 20px;align-items:center;gap:10px;padding:14px 17px;border-bottom:1px solid var(--line)}.song-list>a:last-child{border-bottom:0}.song-list>a:hover{background:var(--brand-soft)}.song-list small{display:block;color:var(--muted);margin-top:3px}.song-list i{font-style:normal;color:var(--muted);font-size:1.3rem}.song-no{font-weight:800;color:var(--brand);font-size:1.08rem}.empty-state{padding:28px;color:var(--muted);text-align:center}.category-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.category-grid a{background:var(--panel);border:1px solid var(--line);border-radius:15px;padding:20px;display:grid;grid-template-columns:40px 1fr;gap:4px 10px}.category-grid a>span{grid-row:1/3;font-size:1.5rem;color:var(--brand)}.category-grid small{color:var(--muted)}.list-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:-8px 0 14px;color:var(--muted);font-size:.82rem}.list-toolbar>div{display:flex;gap:5px}.list-toolbar a{padding:7px 10px;border:1px solid var(--line);border-radius:9px;background:var(--panel)}.list-toolbar a.active{background:var(--brand);border-color:var(--brand);color:#fff}.more-links{display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--line);border-radius:15px;overflow:hidden;margin-bottom:20px}.more-links>a{display:grid;grid-template-columns:38px 1fr 18px;gap:10px;align-items:center;padding:14px 16px;border-bottom:1px solid var(--line)}.more-links>a:last-child{border-bottom:0}.more-links b{font-size:1.25rem;color:var(--brand);text-align:center}.more-links span{display:flex;flex-direction:column}.more-links small{color:var(--muted);margin-top:2px}.more-links i{font-style:normal;color:var(--muted)}.settings-card{background:var(--panel);border:1px solid var(--line);border-radius:15px;padding:20px}.settings-card h2{margin-top:0}.settings-card label{display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-top:1px solid var(--line)}.settings-card select{padding:8px;border:1px solid var(--line);border-radius:8px;background:var(--panel);color:var(--text)}.song-page{max-width:1040px;margin:auto}.song-title-row{display:flex;align-items:flex-start;justify-content:space-between;gap:20px}.song-title-row>div:first-child{display:flex;align-items:baseline;gap:20px}.big-number{font-size:2rem;font-weight:900;color:var(--brand)}.song-title-row h1{font-size:2rem;letter-spacing:-.04em;margin:10px 0 18px}.song-actions{display:flex;gap:8px}.song-actions button,.song-actions a{border:1px solid var(--line);background:var(--panel);width:42px;height:42px;border-radius:11px;display:grid;place-items:center;font-size:1.2rem;color:var(--text)}.song-actions button.active{color:#e53e3e}.song-tabs{display:flex;gap:3px;border-bottom:1px solid var(--line);margin:10px 0 24px}.song-tabs a{padding:11px 18px;color:var(--muted);font-weight:700;border-bottom:2px solid transparent}.song-tabs a.active{color:var(--brand);border-color:var(--brand)}.song-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:25px}.lyrics{background:var(--panel);border:1px solid var(--line);border-radius:15px;padding:26px 30px}.verse{display:grid;grid-template-columns:34px 1fr;gap:5px;margin-bottom:25px}.verse:last-child{margin-bottom:0}.verse>b{color:var(--brand)}.verse p{margin:0;line-height:1.72}.metadata{background:var(--panel);border:1px solid var(--line);border-radius:15px;padding:21px;height:max-content}.metadata dl{margin:0}.metadata dt{font-weight:750;font-size:.8rem;margin-top:13px}.metadata dt:first-child{margin-top:0}.metadata dd{margin:3px 0 0;color:var(--muted);line-height:1.35}.score-view{background:var(--panel);border:1px solid var(--line);border-radius:15px;overflow:hidden}.score-toolbar{padding:12px 15px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;color:var(--muted);font-size:.8rem}.score-view img{display:block;width:100%;height:auto;user-select:none}.score-view iframe{width:100%;height:75vh;border:0}.learn-view{background:var(--panel);border:1px solid var(--line);border-radius:17px;overflow:hidden}.learn-top{display:flex;justify-content:space-between;gap:20px;padding:17px 19px;border-bottom:1px solid var(--line)}.learn-top h2{margin:0;font-size:1.05rem}.learn-top p{margin:4px 0 0;color:var(--muted);font-size:.82rem}.voice-switches{display:flex;flex-wrap:wrap;gap:6px;justify-content:flex-end}.voice-switches input{display:none}.voice-switches span{display:block;padding:7px 10px;border:1px solid var(--line);border-radius:999px;font-size:.75rem;color:var(--muted)}.voice-switches input:checked+span{color:#fff;border-color:transparent}.voice-switches label:nth-child(1) input:checked+span{background:#3578e5}.voice-switches label:nth-child(2) input:checked+span{background:#52a653}.voice-switches label:nth-child(3) input:checked+span{background:#b067d1}.voice-switches label:nth-child(4) input:checked+span{background:#e0922d}.learn-empty{padding:55px 25px;text-align:center;color:var(--muted)}.learn-empty h3{color:var(--text)}.live-score{background:#fff;border-bottom:1px solid var(--line)}.live-score-head{height:36px;padding:0 14px;display:flex;align-items:center;justify-content:space-between;gap:12px;color:#3f4857;border-bottom:1px solid #e7e9ed;font-size:.75rem}.live-score-head span{color:#7b8491}.live-score canvas{width:100%;height:220px;display:block}.original-score{border-top:1px solid var(--line);background:var(--panel)}.original-score summary{cursor:pointer;padding:13px 16px;color:var(--muted);font-size:.82rem;font-weight:700}.original-score img{display:block;width:100%;height:auto;user-select:none}.audio-status{font-size:.75rem;color:var(--muted);min-width:1px}.audio-status.error{color:var(--danger)}.learn-stage{background:#191d23;position:relative}.learn-stage canvas{width:100%;height:250px;display:block}.piano{height:125px;background:#f9f6e9;display:flex;position:relative;border-top:3px solid #653c34;overflow:hidden;padding:0 8px}.piano .white{flex:1;border:1px solid #bfc1b8;border-top:0;background:#fffdf4;border-radius:0 0 3px 3px;position:relative}.piano .white.active{background:var(--active-key-color,#c9defc)!important}.piano .black{position:absolute;top:0;width:2.2%;height:68%;background:#16191d;border-radius:0 0 3px 3px;z-index:2;transform:translateX(-50%)}.piano .black.active{background:var(--active-key-color,#4a8ef1)!important}.piano .key-label{position:absolute;bottom:5px;left:50%;transform:translateX(-50%);font-size:9px;color:#aaa}.player-bar{display:flex;align-items:center;gap:10px;padding:13px 16px;border-top:1px solid var(--line);flex-wrap:wrap}.player-bar button{border:1px solid var(--line);background:var(--panel);border-radius:50%;width:36px;height:36px;color:var(--text)}.player-bar button.play{background:var(--brand);border-color:var(--brand);color:white}.player-bar .time{display:flex;align-items:center;gap:7px;flex:1;min-width:260px}.player-bar .time input{width:100%}.player-bar label{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:.82rem}.player-bar label button{width:30px;height:30px}.presentation-body{overflow:hidden;background:#080a0d;color:white}.presentation{height:100vh;display:grid;grid-template-rows:auto 1fr auto;padding:24px 34px;position:relative;background:radial-gradient(circle at 50% 20%,#151a20,#080a0d 65%)}.presentation header{display:flex;justify-content:space-between;color:#d9dee7}.presentation header button{background:#20252c;color:#fff;border:0;border-radius:8px;width:38px;height:38px}.present-center{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;max-width:1100px;margin:auto;width:100%}.present-center h1{font-size:clamp(2rem,4vw,4.4rem);margin:0 0 35px}.present-text{font-size:clamp(1.7rem,3vw,3.3rem);line-height:1.38;white-space:pre-line}.presentation footer{display:grid;grid-template-columns:1fr auto 1fr;align-items:end;color:#d6dbe4}.presentation footer small{color:#868f9d}.present-controls{display:flex;align-items:center;gap:14px}.present-controls button{width:55px;height:55px;border:0;background:#222830;color:white;border-radius:10px;font-size:2rem}.qr-box{justify-self:end;display:flex;align-items:center;gap:10px;font-size:.8rem}.qr-box img{width:78px;height:78px;background:white;padding:5px;border-radius:6px}.blackout{display:none;position:absolute;inset:0;background:#000;z-index:50}.blackout.on{display:block}.admin-link{font-size:.8rem;color:var(--muted)}
body.dark{--bg:#0f1319;--panel:#171c24;--text:#f0f3f7;--muted:#9ba5b4;--line:#2b323d;--brand-soft:#1d2d4b;--shadow:none}.dark .hero{box-shadow:none}.dark .learn-stage{background:#090b0e}.dark .piano{filter:brightness(.8)}
@media(max-width:900px){.app-shell{display:block}.sidebar{display:none}.content{padding:22px 18px 88px}.bottom-nav{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;left:0;right:0;bottom:0;z-index:40;background:var(--panel);border-top:1px solid var(--line);padding:7px max(6px,env(safe-area-inset-right)) calc(7px + env(safe-area-inset-bottom)) max(6px,env(safe-area-inset-left))}.bottom-nav a{display:flex;flex-direction:column;align-items:center;gap:2px;color:var(--muted);font-size:1.25rem}.bottom-nav a.active{color:var(--brand)}.bottom-nav small{font-size:.65rem}.song-layout{grid-template-columns:1fr}.metadata{order:2}.learn-top{flex-direction:column}.voice-switches{justify-content:flex-start}.live-score canvas{height:190px}.learn-stage canvas{height:220px}.piano{height:100px}.presentation{padding:18px}.quick-grid{grid-template-columns:repeat(2,1fr)}.category-grid{grid-template-columns:1fr}}
@media(max-width:600px){.content{padding:15px 12px 82px}.hero{min-height:280px;padding:25px;border-radius:17px}.song-title-row{align-items:flex-start}.song-title-row>div:first-child{display:block}.big-number{font-size:1.35rem}.song-title-row h1{font-size:1.65rem;margin-top:2px}.song-actions{gap:5px}.song-actions button,.song-actions a{width:38px;height:38px}.song-tabs a{flex:1;text-align:center;padding:10px 5px;font-size:.82rem}.lyrics{padding:20px 17px}.verse{grid-template-columns:28px 1fr}.score-toolbar span:last-child{display:none}.live-score canvas{height:170px}.live-score-head span{display:none}.player-bar .time{order:5;min-width:100%;}.presentation footer{grid-template-columns:1fr auto}.qr-box{display:none}.presentation footer>div:first-child{display:none}.present-controls{grid-column:1/-1;justify-content:center}.present-text{font-size:clamp(1.45rem,7vw,2.3rem)}}

.refrain-repeat{padding-top:4px;border-top:1px dashed var(--line)}.player-bar button:disabled{opacity:.45;cursor:wait}.audio-status:not(:empty){padding:6px 9px;border-radius:8px;background:var(--brand-soft)}