*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{-webkit-font-smoothing:antialiased;font-family:system-ui,-apple-system,sans-serif}body{color:#e2e8f0;background:#0d0d18;min-height:100svh}button{cursor:pointer;color:inherit;background:0 0;border:none;font-family:inherit}ul{list-style:none}#root{flex-direction:column;min-height:100svh;display:flex}:root{--bg:#0d0d18;--surface:#16162a;--surface-2:#1e1e35;--border:#ffffff12;--accent:#f59e0b;--accent-glow:#f59e0b40;--text:#e2e8f0;--muted:#64748b;--white-key:#f7f7f7;--black-key:#1a1a30;--radius:14px}.song-list{width:100%;max-width:600px;margin:0 auto;padding:48px 24px 80px}.list-header{text-align:center;margin-bottom:48px}.list-icon{margin-bottom:16px;font-size:48px;display:block}.list-header h1{letter-spacing:-.5px;color:var(--text);margin-bottom:8px;font-size:36px;font-weight:600}.list-subtitle{color:var(--muted);font-size:15px}.songs{flex-direction:column;gap:12px;display:flex}.song-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);align-items:stretch;transition:border-color .15s,transform .1s;display:flex;position:relative;overflow:hidden}.song-card.playing{border-color:#f59e0b66}.song-card-body{text-align:left;flex:1;justify-content:space-between;align-items:center;padding:20px 16px 20px 24px;transition:background .15s;display:flex}.song-card-body:hover{background:var(--surface-2)}.song-card:not(.playing):hover{transform:translateY(-1px)}.song-card:not(.playing):active{transform:translateY(0)}.song-info{flex-direction:column;gap:4px;display:flex}.song-title{color:var(--text);font-size:17px;font-weight:500}.song-composer{color:var(--muted);font-size:13px}.song-meta{color:var(--muted);align-items:center;gap:12px;font-size:13px;display:flex}.playing-label{color:var(--accent);font-size:13px}.arrow{opacity:.4;font-size:18px;transition:opacity .15s,transform .15s}.song-card-body:hover .arrow{opacity:1;transform:translate(3px)}.play-btn{border-left:1px solid var(--border);width:56px;color:var(--muted);flex-shrink:0;justify-content:center;align-items:center;transition:background .15s,color .15s;display:flex}.play-btn:hover{background:var(--surface-2);color:var(--text)}.play-btn.stop{color:var(--accent)}.play-btn.stop:hover{background:#f59e0b14}.song-progress-bar{background:var(--accent);border-radius:0 2px 0 0;height:3px;transition:width .25s linear;position:absolute;bottom:0;left:0}.song-player{flex-direction:column;min-height:100svh;display:flex;overflow:hidden}.player-header{border-bottom:1px solid var(--border);flex-shrink:0;justify-content:space-between;align-items:center;padding:16px 24px;display:flex}.back-btn{color:var(--muted);white-space:nowrap;border-radius:8px;padding:6px 10px;font-size:14px;transition:color .15s,background .15s}.back-btn:hover{color:var(--text);background:var(--surface)}.player-title{color:var(--text);text-align:center;flex-direction:column;align-items:center;gap:2px;font-size:15px;font-weight:500;display:flex}.player-composer{color:var(--muted);font-size:12px;font-weight:400}.player-progress-text{color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap;text-align:right;min-width:60px;font-size:13px}.strip-area{border-bottom:1px solid var(--border);background:var(--surface);flex-shrink:0}.note-strip-scroll{-webkit-overflow-scrolling:touch;padding:8px 0;overflow:auto hidden;-webkit-mask-image:linear-gradient(90deg,#0000 0,#000 48px calc(100% - 48px),#0000 100%);mask-image:linear-gradient(90deg,#0000 0,#000 48px calc(100% - 48px),#0000 100%)}.note-strip-scroll::-webkit-scrollbar{display:none}.note-display-area{flex-direction:column;flex:1;justify-content:center;align-items:center;gap:10px;display:flex}.big-note{flex-wrap:wrap;justify-content:center;align-items:flex-end;gap:10px;line-height:1;display:flex}.note-item{align-items:flex-end;gap:4px;display:flex}.note-sep{color:var(--muted);padding:0 2px 14px;font-size:36px;font-weight:300;line-height:1}.note-name{color:var(--accent);letter-spacing:-5px;font-size:108px;font-weight:700;line-height:1}.note-octave{color:var(--muted);padding-bottom:8px;font-size:48px;font-weight:500}.finger-hint{color:var(--muted);font-size:13px}.keyboard-area{flex-shrink:0;padding:0 0 8px}.keyboard-scroll{-webkit-overflow-scrolling:touch;padding:12px 24px;overflow-x:auto;-webkit-mask-image:linear-gradient(90deg,#0000 0,#000 32px calc(100% - 32px),#0000 100%);mask-image:linear-gradient(90deg,#0000 0,#000 32px calc(100% - 32px),#0000 100%)}.keyboard-scroll::-webkit-scrollbar{display:none}.keyboard-inner{margin:0 auto;position:relative}.white-key{background:var(--white-key);border:1px solid #bbb;border-radius:0 0 6px 6px;justify-content:center;align-items:flex-end;height:140px;padding-bottom:6px;transition:background .1s;display:flex;position:absolute;top:0;box-shadow:inset 0 -4px 6px #00000014}.white-key.active{background:var(--accent);box-shadow:0 0 20px var(--accent-glow), inset 0 -4px 6px #0000001a;z-index:1;border-color:#c07a00}.key-label{color:#999;-webkit-user-select:none;user-select:none;font-size:9px}.white-key.active .key-label{color:#7a4e00;font-weight:700}.black-key{background:var(--black-key);z-index:2;border-radius:0 0 4px 4px;height:90px;transition:background .1s;position:absolute;top:0;box-shadow:2px 4px 8px #00000080}.black-key.active{background:var(--accent);box-shadow:0 0 16px var(--accent-glow), 2px 4px 8px #0006}.nav-buttons{flex-shrink:0;justify-content:space-between;align-items:center;gap:12px;padding:16px 24px 8px;display:flex}.nav-btn{background:var(--surface);border:1px solid var(--border);border-radius:10px;flex:1;padding:12px 22px;font-size:15px;font-weight:500;transition:background .15s,opacity .15s}.nav-btn:hover:not(:disabled){background:var(--surface-2)}.nav-btn:disabled{opacity:.3;cursor:default}.nav-btn.primary{background:var(--accent);color:#000;border-color:var(--accent)}.nav-btn.primary:hover:not(:disabled){background:#e08c00}.player-play-btn{background:var(--surface);border:1px solid var(--border);width:52px;height:52px;color:var(--text);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;transition:background .15s,transform .1s,border-color .15s;display:flex}.player-play-btn:hover{background:var(--surface-2);transform:scale(1.06)}.player-play-btn.playing{background:var(--accent);border-color:var(--accent);color:#000}.player-play-btn.playing:hover{background:#e08c00}.keyboard-hint{color:var(--muted);font-size:12px}.duration-label{color:var(--muted);letter-spacing:.5px;text-transform:lowercase;font-size:14px}