:root{--bg: #0b0d12;--panel-bg: #11141b;--panel-border: rgba(255, 255, 255, .08);--cell-bg: #161b26;--cell-border: #2a3140;--text: #eceff4;--text-muted: #8b95a7;--accent: #ffca28;--accent-text: #0b0d12;--next: #5ec8ff;--warn: #ff9e5a;--ok: #5ec8ff;--font: "Inter", "Helvetica Neue", "Segoe UI", system-ui, -apple-system, sans-serif}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:var(--font);-webkit-font-smoothing:antialiased}.app{display:grid;grid-template-columns:300px 1fr;height:100vh;height:100dvh;overflow:hidden}.mobile-bar,.backdrop,.sidebar-close{display:none}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;flex:0 0 auto;border:1px solid var(--cell-border);border-radius:10px;background:var(--cell-bg);color:var(--text);cursor:pointer;-webkit-tap-highlight-color:transparent}.icon-btn:active{background:var(--panel-border)}.sidebar{display:flex;flex-direction:column;border-right:1px solid var(--panel-border);background:var(--panel-bg);min-height:0}.sidebar-header{padding:20px 18px 12px;border-bottom:1px solid var(--panel-border)}.sidebar-header h1{margin:0;font-size:20px;letter-spacing:.3px}.subtitle{margin:2px 0 12px;font-size:12px;color:var(--text-muted)}.search{width:100%;padding:8px 10px;border-radius:8px;border:1px solid var(--cell-border);background:var(--cell-bg);color:var(--text);font-size:13px;outline:none}.search:focus{border-color:var(--accent)}.song-list{flex:1;overflow-y:auto;padding:8px;min-height:0}.song-item{display:flex;flex-direction:column;gap:4px;width:100%;text-align:left;padding:10px 12px;margin-bottom:4px;border-radius:10px;border:1px solid transparent;background:transparent;color:var(--text);cursor:pointer;transition:background .12s ease,border-color .12s ease}.song-item:hover{background:var(--cell-bg)}.song-item.active{background:var(--cell-bg);border-color:var(--accent)}.song-title{font-size:14px;font-weight:600}.song-sub{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--text-muted)}.song-key{font-variant-numeric:tabular-nums}.empty{color:var(--text-muted);font-size:13px;padding:12px}.sidebar-footer{padding:12px 16px;border-top:1px solid var(--panel-border);font-size:11px;color:var(--text-muted)}.sidebar-footer code,.hint code,.placeholder code{color:var(--accent);background:#ffca2814;padding:1px 4px;border-radius:4px;font-size:.95em}.main{display:flex;flex-direction:column;min-width:0;padding:24px 28px;gap:16px;overflow-y:auto}.song-header h2{margin:0 0 8px;font-size:26px}.meta-row{display:flex;flex-wrap:wrap;gap:8px}.badge{font-size:12px;padding:3px 9px;border-radius:999px;border:1px solid var(--cell-border);background:var(--cell-bg);color:var(--text-muted);white-space:nowrap}.badge-ok{color:var(--accent-text);background:var(--accent);border-color:var(--accent);font-weight:600}.badge-warn{color:var(--warn);border-color:#ff9e5a66;background:#ff9e5a1a}.stage{width:100%;max-width:1600px;aspect-ratio:16 / 9;align-self:center;border-radius:12px;overflow:hidden;border:1px solid var(--panel-border);background:#000;box-shadow:0 20px 60px #00000080}.hint{font-size:12px;color:var(--text-muted);text-align:center;margin:0}.placeholder{margin:auto;color:var(--text-muted)}.sidebar-title-row{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}@media (max-width: 820px){.app{display:flex;flex-direction:column}.mobile-bar{display:flex;align-items:center;gap:12px;padding:10px 12px;padding-top:max(10px,env(safe-area-inset-top));border-bottom:1px solid var(--panel-border);background:var(--panel-bg);position:sticky;top:0;z-index:30}.mobile-title{font-size:16px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar{position:fixed;top:0;left:0;bottom:0;width:min(86vw,340px);z-index:50;transform:translate(-100%);transition:transform .25s ease;will-change:transform}.sidebar.open{transform:translate(0);box-shadow:0 0 60px #0009}.sidebar-close{display:inline-flex}.backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:40;background:#0000008c;opacity:0;pointer-events:none;transition:opacity .25s ease}.backdrop.show{display:block;opacity:1;pointer-events:auto}.main{flex:1;padding:14px 14px 20px;padding-bottom:max(20px,env(safe-area-inset-bottom))}.song-header h2{font-size:20px}.stage{border-radius:10px}.song-item{padding:12px 14px}.search{font-size:16px}}@media (max-width: 820px) and (orientation: landscape){.main{padding:8px 12px;gap:8px;overflow-y:auto}.song-header h2{font-size:16px;margin-bottom:4px}.hint{display:none}.stage{width:auto;max-width:100%;height:calc(100dvh - 112px);aspect-ratio:16 / 9;align-self:center}}