:root{color-scheme:dark;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:#101820;color:#f5f8fb}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh}button,input,textarea{font:inherit}button{min-height:42px;border:0;border-radius:6px;background:#4bd4a7;color:#07120f;font-weight:800;padding:0 16px;cursor:pointer}button:disabled{opacity:.55;cursor:not-allowed}button.secondary,button.ghost{background:#283746;color:#f5f8fb;border:1px solid #405467}button.danger{background:#ff6b6b;color:#1b0303}input,textarea{width:100%;border:1px solid #405467;border-radius:6px;background:#0d151d;color:#f5f8fb;padding:12px}textarea{min-height:120px;resize:vertical}label{display:block;margin:14px 0 6px;color:#c9d6e2}.shell{width:min(680px,calc(100vw - 32px));margin:0 auto;padding:18px 0 56px}.authShell{min-height:100vh;display:grid;place-items:center}.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:10px}.topbar strong{color:#4bd4a7;font-weight:900}h1,h2,p{margin-top:0}h1{margin-bottom:0;font-size:clamp(28px,5vw,44px)}h2{font-size:20px}.eyebrow{margin-bottom:6px;color:#75e2bd;text-transform:uppercase;letter-spacing:0;font-size:12px;font-weight:900}.panel{border:1px solid #304454;border-radius:8px;background:#18232d;padding:16px}.authPanel{width:min(430px,100%)}.tabs,.segmented,.actions,.sessionMeta,.songHeader,.splitGenerate{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.tabs{margin-bottom:18px}.tabs button,.segmented button{flex:1;min-width:86px;background:#253442;color:#f5f8fb}.tabs button.active,.segmented button.active{background:#4bd4a7;color:#07120f}.splitGenerate{flex-wrap:nowrap}.splitGenerate button:first-child{flex:3}.splitGenerate button:last-child{flex:1}.codeInput{text-transform:uppercase;font-size:18px;text-align:left;letter-spacing:0;margin-bottom:12px}.sessionPicker,.sessionStack{display:grid;gap:12px}.sessionPicker form{display:grid;gap:0}.playbackPanel{display:grid;gap:8px}.playbackMeta{display:flex;align-items:center;justify-content:space-between;gap:12px}.playbackMeta strong{font-size:22px;font-weight:950}.playbackMeta span{color:#b7c8d8;font-size:14px;text-align:right}.player{width:100%;margin-top:12px}.customPlayer{position:relative;height:82px;overflow:hidden;border-radius:18px;background:#4054675c}.customPlayer audio{display:none}.waveBars{position:absolute;inset:10px 18px 24px;display:flex;align-items:center;justify-content:space-between;gap:3px}.waveBars span{width:3px;min-height:7px;border-radius:999px;background:#f5f8fb38}.waveBars span.played{background:#4bd4a7db}.progressTrack{position:absolute;left:18px;right:18px;bottom:12px;height:5px;overflow:hidden;border-radius:999px;background:#f5f8fb1f}.progressTrack span{display:block;height:100%;border-radius:inherit;background:#4bd4a7db}.playerToggle{position:absolute;left:50%;top:50%;width:52px;height:52px;min-height:52px;display:grid;place-items:center;padding:0;border-radius:999px;transform:translate(-50%,-50%);box-shadow:0 14px 28px #00000047}.playIcon{width:0;height:0;margin-left:4px;border-top:10px solid transparent;border-bottom:10px solid transparent;border-left:16px solid currentColor}.pauseIcon{width:18px;height:20px;border-left:6px solid currentColor;border-right:6px solid currentColor}.songList{display:grid;gap:12px}.songRow{border:1px solid #304454;border-radius:8px;padding:14px;background:#18232d}.songSummary p{margin-bottom:8px;line-height:1.45}.songSummary small{color:#b7c8d8;display:block}.status{border-radius:999px;padding:4px 9px;background:#34495a;color:#f5f8fb;font-size:12px;font-weight:800}.status.ready,.status.playing{background:#4bd4a7;color:#07120f}.status.failed{background:#ff6b6b;color:#1b0303}.error,.errorText{color:#ffaaa5}.error{border:1px solid #803232;background:#331a1a;padding:12px;border-radius:8px}.notice{color:#91f2d0}.muted{color:#b7c8d8}@media(max-width:840px){.topbar{align-items:center;flex-direction:row}}