:root{--bg:#0a0a0a;--bg-elevated:#0f0f0f;--bg-card:#141414;--bg-hover:#1a1a1a;--border:#1f1f1f;--border-hover:#2a2a2a;--ink:#fff;--ink-secondary:#a0a0a0;--ink-muted:#6b6b6b;--accent:#d4af37;--accent-hover:#e0be4a;--accent-subtle:#d4af3714;--accent-glow:#d4af3726;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:20px;--shadow-sm:0 1px 2px #0000004d;--shadow-md:0 4px 12px #0006;--shadow-lg:0 8px 32px #00000080;--font:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scrollbar-gutter:stable;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font);background:var(--bg);color:var(--ink);min-height:100vh;line-height:1.6}input,button,textarea,select{font-family:inherit}.appShell{flex-direction:column;max-width:720px;min-height:100vh;margin:0 auto;padding:20px 16px 48px;display:flex}.topbar{z-index:50;background:var(--bg);justify-content:space-between;align-items:center;margin-bottom:32px;padding:12px 0;display:flex;position:sticky;top:0}.topbar:after{content:"";background:linear-gradient(90deg, transparent, var(--border), transparent);height:1px;position:absolute;bottom:0;left:-16px;right:-16px}.brand{letter-spacing:-.03em;color:var(--ink);align-items:center;font-family:JetBrains Mono,monospace;font-size:20px;font-weight:800;text-decoration:none;display:flex}.brandAccent{color:var(--accent)}.mainNav{background:var(--bg-elevated);border:1px solid var(--border);border-radius:10px;gap:4px;padding:3px;display:flex}.navLink{color:var(--ink-muted);border-radius:7px;align-items:center;gap:6px;padding:6px 12px;font-size:13px;font-weight:500;text-decoration:none;transition:all .2s;display:flex}.navLink:hover{color:var(--ink-secondary);background:var(--bg-hover)}.navLink.active{color:var(--ink);background:var(--bg-card);box-shadow:var(--shadow-sm)}.mainWrap{flex-direction:column;flex:1;display:flex}.panel{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);padding:32px 28px;animation:.45s fadeUp;position:relative;overflow:hidden}.panelTitle{letter-spacing:-.02em;text-align:center;margin-bottom:8px;font-size:clamp(22px,3vw,28px);font-weight:700;line-height:1.3}.panelSubtitle{color:var(--ink-secondary);text-align:center;max-width:55ch;margin:0 auto 24px;font-size:14px;line-height:1.6}.platformBar{flex-wrap:wrap;justify-content:center;gap:6px;margin-bottom:20px;display:flex}.platformChip{color:var(--ink-muted);border:1px solid var(--border);cursor:pointer;background:0 0;border-radius:999px;padding:6px 14px;font-size:13px;font-weight:500;text-decoration:none;transition:all .2s}.platformChip:hover{border-color:var(--border-hover);color:var(--ink-secondary);background:var(--bg-hover)}.platformChip.active{background:var(--accent-subtle);border-color:var(--accent);color:var(--accent)}.modeSwitch{background:var(--bg-elevated);border:1px solid var(--border);border-radius:10px;width:fit-content;margin-bottom:24px;margin-left:auto;margin-right:auto;padding:3px;display:flex}.modeBtn{color:var(--ink-muted);cursor:pointer;background:0 0;border:none;border-radius:7px;align-items:center;gap:6px;padding:8px 18px;font-size:13px;font-weight:600;transition:all .2s;display:flex}.modeBtn:hover{color:var(--ink-secondary)}.modeBtn.active{background:var(--bg-card);color:var(--ink);box-shadow:var(--shadow-sm)}.inputGroup{flex-direction:column;align-items:center;gap:12px;display:flex}.inputRow{gap:8px;width:100%;max-width:520px;display:flex}.field{background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--ink);outline:none;flex:1;min-width:0;padding:12px 16px;font-size:14px;transition:all .2s}.field:hover{border-color:var(--border-hover)}.field:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}.field::placeholder{color:var(--ink-muted)}.field:disabled{opacity:.5;cursor:not-allowed}.primaryBtn{background:var(--accent);color:#0a0a0a;border-radius:var(--radius-sm);cursor:pointer;white-space:nowrap;border:none;justify-content:center;align-items:center;gap:6px;padding:12px 20px;font-size:14px;font-weight:700;transition:all .2s;display:inline-flex}.primaryBtn:hover{background:var(--accent-hover);box-shadow:0 4px 16px var(--accent-glow);transform:translateY(-1px)}.primaryBtn:disabled{opacity:.5;cursor:not-allowed;box-shadow:none;transform:none}.secondaryBtn{border:1px solid var(--border);color:var(--ink-secondary);background:0 0}.secondaryBtn:hover{background:var(--bg-hover);border-color:var(--border-hover);color:var(--ink);box-shadow:none;transform:translateY(-1px)}.songGrid{gap:6px;width:100%;max-width:520px;margin-top:16px;display:grid}.songItem{text-align:left;background:var(--bg-elevated);border:1px solid var(--border);width:100%;color:var(--ink);border-radius:var(--radius-sm);cursor:pointer;align-items:center;gap:12px;padding:10px 14px;font-size:13px;transition:all .15s;display:flex}.songItem:hover{background:var(--bg-hover);border-color:var(--accent)}.songItem:disabled{opacity:.4;cursor:not-allowed}.songNumber{color:var(--ink-muted);min-width:20px;font-size:11px;font-weight:600}.progressSection{flex-direction:column;gap:8px;width:100%;margin-top:20px;animation:.3s fadeUp;display:flex}.progressTrack{background:var(--bg-elevated);border-radius:999px;width:100%;height:6px;overflow:hidden}.progressFill{background:linear-gradient(90deg, var(--accent), var(--accent-hover));border-radius:999px;min-width:0;height:100%;transition:width .3s}.progressFill.indeterminate{background:linear-gradient(90deg, var(--accent), var(--accent-hover), var(--accent));background-size:200% 100%;width:30%;animation:1.4s ease-in-out infinite progressIndeterminate}@keyframes progressIndeterminate{0%{transform:translate(-100%)}to{transform:translate(400%)}}.statusLine{text-align:center;color:var(--ink-secondary);min-height:20px;margin-top:16px;font-size:13px;transition:all .2s}.statusLine.loading{animation:1.8s ease-in-out infinite statusPulse}.statusLine.warning{color:#f87171;animation:none}.statusLine.success{color:var(--accent);animation:none}@keyframes statusPulse{0%,to{opacity:.55}50%{opacity:1}}.faqGrid{gap:8px;display:grid}.faqItem{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);cursor:pointer;padding:16px;list-style:none;transition:all .2s}.faqItem:hover{border-color:var(--border-hover)}.faqItem summary{cursor:pointer;justify-content:space-between;align-items:center;gap:12px;font-size:14px;font-weight:600;display:flex}.faqItem summary::-webkit-details-marker{display:none}.faqItem[open] summary{margin-bottom:10px}.faqItem p{color:var(--ink-secondary);font-size:13px;line-height:1.7}.emptyState{text-align:center;color:var(--ink-muted);padding:40px 20px}.notFound{text-align:center;padding:60px 20px}.notFound h2{color:var(--accent);margin-bottom:8px;font-size:48px;font-weight:800}.notFound p{color:var(--ink-secondary);margin-bottom:20px}.shimmer{background:linear-gradient(90deg, var(--bg-elevated) 25%, var(--bg-hover) 50%, var(--bg-elevated) 75%);border-radius:var(--radius-sm);background-size:200% 100%;animation:1.5s infinite shimmer}@keyframes fadeUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}@media (width<=640px){.appShell{padding:12px 12px 32px}.topbar{margin-bottom:20px}.panel{border-radius:var(--radius-lg);padding:24px 16px}.inputRow{flex-direction:column}.primaryBtn{width:100%}.platformBar{gap:4px}.platformChip{padding:5px 10px;font-size:12px}.brand{font-size:18px}.navLink{padding:5px 10px;font-size:12px}.songGrid{max-width:100%}}