:root{color-scheme:light;--bg: #f6f7f9;--surface: #ffffff;--surface-muted: #f9fafb;--border: #e5e7eb;--border-strong: #d1d5db;--text: #111827;--text-muted: #6b7280;--text-soft: #9ca3af;--accent: #2563eb;--accent-hover: #1d4ed8;--waveform: #0f766e;--playhead: #2563eb;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 14px;--shadow-card: 0 8px 24px rgba(15, 23, 42, .06);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text);font-synthesis:none;text-rendering:optimizeLegibility}*{box-sizing:border-box}body{margin:0;min-width:320px;background:var(--bg);color:var(--text)}button,select,input{font:inherit}.app-shell{display:flex;width:100%;min-height:100vh;flex-direction:column}.site-container{width:100%;max-width:1180px;margin:0 auto;padding-right:24px;padding-left:24px}.workspace-container{width:100%;max-width:none;padding-right:16px;padding-left:16px}.app-header{position:sticky;z-index:10;top:0;border-bottom:1px solid var(--border);background:#ffffffd9;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.header-inner{display:flex;min-height:60px;align-items:center;justify-content:space-between;gap:24px}.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-size:17px;font-weight:780;letter-spacing:0;text-decoration:none;white-space:nowrap}.brand-mark{display:inline-flex;width:28px;height:28px;align-items:center;justify-content:center;border:1px solid rgba(37,99,235,.18);border-radius:var(--radius-sm);background:#eff6ff;color:var(--accent);font-size:10px;font-weight:800}.site-nav,.site-footer nav{display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:6px}.site-nav a,.site-footer a{border-radius:var(--radius-sm);color:var(--text-muted);font-size:14px;font-weight:560;text-decoration:none}.site-nav a{padding:8px 11px}.site-nav a:hover,.site-nav a[aria-current=page],.site-footer a:hover{color:var(--text)}.site-nav a[aria-current=page]{background:#eff6ff;color:var(--accent)}.app-main{flex:1;padding-top:24px;padding-bottom:36px}.viewer-intro-section{display:grid;gap:16px;max-width:1080px}.below-viewer-section{margin-top:20px;max-width:1080px}.site-footer{border-top:1px solid var(--border);background:var(--surface)}.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:68px;color:var(--text-muted);font-size:13px}.footer-note{margin-left:10px;color:var(--text-soft)}.site-footer a{padding:3px 0;font-size:13px}.section-label{margin:0;color:var(--text-muted);font-size:11px;font-weight:740;letter-spacing:.08em;text-transform:uppercase}h1,h2{margin:0;color:var(--text);letter-spacing:0}h1{font-size:clamp(34px,4vw,52px);line-height:1.02}h2{font-size:22px;line-height:1.2}p{color:var(--text-muted)}.empty-state{position:relative;display:flex;flex-direction:column;gap:22px;align-items:stretch;min-height:280px;border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--surface);box-shadow:var(--shadow-card);padding:clamp(26px,4vw,42px);overflow:hidden}.empty-state:after{content:"";position:absolute;right:-24px;bottom:-8px;width:min(48%,520px);height:180px;background:linear-gradient(90deg,transparent 0 8%,var(--waveform) 8% 9%,transparent 9% 15%,var(--waveform) 15% 17%,transparent 17% 22%,var(--waveform) 22% 23%,transparent 23% 29%,var(--waveform) 29% 32%,transparent 32% 38%,var(--waveform) 38% 39%,transparent 39% 45%,var(--waveform) 45% 48%,transparent 48% 53%,var(--waveform) 53% 55%,transparent 55% 61%,var(--waveform) 61% 62%,transparent 62% 69%,var(--waveform) 69% 72%,transparent 72% 78%,var(--waveform) 78% 79%,transparent 79% 86%,var(--waveform) 86% 88%,transparent 88% 100%);opacity:.06;pointer-events:none}.empty-state-copy{position:relative;z-index:1;width:100%}.empty-state h1{margin-top:8px;font-size:clamp(40px,5vw,58px)}.empty-state h2{margin-top:12px;font-size:clamp(21px,2vw,28px)}.empty-state p{max-width:780px;margin:14px 0 0;font-size:16px;line-height:1.6}.empty-state-list{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0 0;padding:0;list-style:none}.empty-state-list li{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface-muted);color:#374151;padding:6px 9px;font-size:13px;font-weight:600}.empty-state-divider{height:1px;margin-top:22px;background:var(--border)}.empty-how-it-works{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:16px 0 0;padding:0;list-style:none}.empty-how-it-works li{display:grid;grid-template-columns:auto minmax(0,1fr);column-gap:10px;min-width:0;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface-muted);padding:12px}.empty-how-it-works strong{display:block}.empty-how-it-works strong{color:var(--text);font-size:13px;font-weight:720}.empty-how-it-works li>span:not(.step-number){display:block;grid-column:2;margin-top:5px;color:var(--text-muted);font-size:12px;line-height:1.45}.step-number{display:inline-flex;grid-row:span 2;width:22px;height:22px;align-items:center;justify-content:center;border:1px solid rgba(37,99,235,.18);border-radius:999px;background:#2563eb14;color:var(--accent);font-size:12px;font-weight:760}.empty-state-actions{position:relative;z-index:1;display:flex;min-width:0;flex-direction:column;align-items:center;gap:9px;padding-top:2px}.empty-state-actions span{color:var(--text-muted);font-size:12px;line-height:1.45}.controls,.meta,.support-card,.static-page{border:1px solid var(--border);border-radius:var(--radius-md);background:var(--surface);box-shadow:var(--shadow-card)}.controls{display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;padding:16px}.controls p{margin:4px 0 0;font-size:14px}input[type=file]{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);clip-path:inset(50%);white-space:nowrap}.file-picker,.primary-link,.secondary-link{display:inline-flex;min-height:40px;align-items:center;justify-content:center;border-radius:var(--radius-sm);padding:0 16px;font-size:15px;font-weight:760;text-decoration:none;cursor:pointer;transition:background .12s ease,border-color .12s ease,color .12s ease,transform .12s ease}.empty-state .file-picker{width:min(100%,260px);min-height:44px}.file-picker,.primary-link{border:1px solid #1d4ed8;background:#1d4ed8;color:#fff}.file-picker span,.primary-link span{color:#fff}.file-picker:hover,.primary-link:hover{border-color:#1e40af;background:#1e40af}.secondary-link{border:1px solid var(--border-strong);background:var(--surface);color:var(--text)}.secondary-link:hover{border-color:var(--text-soft);background:var(--surface-muted)}.file-picker:active,.primary-link:active,.secondary-link:active{transform:translateY(1px)}.file-picker:focus-within,.primary-link:focus-visible,.secondary-link:focus-visible{outline:2px solid #93c5fd;outline-offset:3px}.meta{display:grid;grid-template-columns:minmax(220px,1fr) minmax(0,2fr);gap:16px;align-items:center;padding:16px}.meta-file{min-width:0}.meta-file span,.meta-chip span{display:block;margin-bottom:4px;color:var(--text-muted);font-size:12px}.meta-file strong{display:block;overflow:hidden;color:#1f2937;font-size:15px;font-weight:680;text-overflow:ellipsis;white-space:nowrap}.meta-chips{display:flex;min-width:0;flex-wrap:wrap;justify-content:flex-end;gap:8px}.meta-chip{min-width:112px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface-muted);padding:8px 10px}.meta-chip strong{display:block;color:#1f2937;font-size:13px;font-weight:680;white-space:nowrap}.waveform-viewer{width:100%;margin-top:18px}.waveform-card{width:100%;max-width:none;overflow:hidden;border:1px solid var(--border);border-radius:12px;background:var(--surface);box-shadow:var(--shadow-card)}.waveform-toolbar{display:flex;min-height:48px;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 18px;border-bottom:1px solid var(--border);background:var(--surface);padding:8px 12px;font-size:13px}.toolbar-left,.toolbar-right{display:flex;min-width:0;flex-wrap:wrap;align-items:center;gap:8px}.toolbar-right{justify-content:flex-end}.toolbar-readout{color:var(--text-muted);font-variant-numeric:tabular-nums;white-space:nowrap}.waveform-toolbar button{display:inline-flex;min-width:42px;height:32px;align-items:center;justify-content:center;gap:6px;border:1px solid var(--border-strong);border-radius:var(--radius-sm);background:var(--surface-muted);color:#1f2937;padding:0 10px;cursor:pointer;transition:background .12s ease,border-color .12s ease,color .12s ease}.waveform-toolbar .icon-button{width:32px;min-width:32px;padding:0}.waveform-toolbar svg,.icon-button svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;stroke-width:2}.waveform-toolbar button:hover:not(:disabled){border-color:var(--text-soft);background:#f3f4f6}.waveform-toolbar button:disabled{color:var(--text-soft);cursor:default}.speed-control{display:inline-flex;height:32px;align-items:center;gap:6px;color:var(--text-muted)}.speed-control select{height:32px;border:1px solid var(--border-strong);border-radius:var(--radius-sm);background:var(--surface-muted);color:#1f2937;padding:0 8px}.speed-control select:disabled{color:var(--text-soft)}.speed-control select:focus-visible,.waveform-toolbar button:focus-visible{outline:2px solid #93c5fd;outline-offset:2px}.canvas-wrap{position:relative;overflow-x:auto;overflow-y:hidden;background:var(--surface-muted);cursor:crosshair}.waveform-timeline{min-width:100%}canvas{display:block;position:sticky;left:0}.playhead{position:absolute;z-index:2;top:0;bottom:0;width:18px;transform:translate(-9px);cursor:ew-resize;pointer-events:auto}.playhead:before{content:"";position:absolute;top:0;bottom:0;left:8px;width:2px;background:var(--playhead);box-shadow:0 0 0 1px #2563eb2e}.playhead-handle{position:absolute;top:6px;left:50%;width:14px;height:18px;border:1px solid var(--accent-hover);border-radius:3px;background:var(--playhead);box-shadow:0 3px 8px #2563eb33;transform:translate(-50%)}.playhead-handle:before{content:"";position:absolute;top:4px;bottom:4px;left:4px;width:3px;border-right:1px solid rgba(255,255,255,.62);border-left:1px solid rgba(255,255,255,.62)}.waveform-resize-handle{position:relative;height:12px;border:0;border-top:1px solid var(--border);background:var(--surface);cursor:ns-resize}.waveform-resize-handle:before{content:"";position:absolute;top:4px;left:50%;width:54px;height:3px;transform:translate(-50%);border-top:1px solid #aeb5bf;border-bottom:1px solid #aeb5bf}.waveform-resize-handle:focus-visible{outline:2px solid #93c5fd;outline-offset:2px}.waveform-inspector{min-height:36px;border-top:1px solid var(--border);background:var(--surface);color:var(--text-muted);padding:9px 12px;font-size:12px;font-variant-numeric:tabular-nums;line-height:1.4}.support-card{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-top:16px;padding:18px}.support-card h2{margin-top:3px;font-size:18px}.support-card p{margin:5px 0 0;font-size:14px}.static-page{max-width:760px;padding:32px}.static-page h1{margin-top:6px;font-size:clamp(30px,4vw,42px)}.static-page-content{margin-top:18px}.static-page-content p{margin:0 0 14px;font-size:16px;line-height:1.65}.ad-slot{border:1px dashed var(--border-strong);border-radius:var(--radius-md);background:var(--surface-muted);color:var(--text-soft);font-size:12px;text-align:center}.ad-slot-horizontal{margin:18px 16px 0;padding:14px}.ad-slot-inline{padding:14px}.ad-slot-sidebar{min-height:260px;padding:14px}@media (min-width: 1600px){.workspace-container{padding-right:24px;padding-left:24px}}@media (max-width: 768px){.site-container,.workspace-container{padding-right:12px;padding-left:12px}.header-inner{min-height:auto;flex-wrap:wrap;padding-top:12px;padding-bottom:10px}.site-nav{justify-content:flex-start}.app-main{padding-top:16px}.empty-state,.meta,.empty-how-it-works{grid-template-columns:1fr}.empty-state{min-height:auto}.empty-state-actions,.file-picker{width:100%}.footer-note{display:block;margin-top:4px;margin-left:0}.meta-chips{justify-content:flex-start}.toolbar-left,.toolbar-right{width:100%;justify-content:flex-start}.waveform-toolbar{align-items:flex-start}.support-card,.footer-inner{align-items:flex-start;flex-direction:column}.static-page{padding:22px}}