:root{color-scheme:dark;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5;--accent: #6366f1;--accent-hover: #818cf8;--accent-glow: rgba(99, 102, 241, .25);--danger: #ef4444;--danger-bg: rgba(239, 68, 68, .1);--surface: rgba(255, 255, 255, .04);--surface-hover: rgba(255, 255, 255, .08);--border: rgba(255, 255, 255, .1);--text-muted: rgba(255, 255, 255, .55);--radius: .75rem;--radius-sm: .5rem}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100vh;background:#0a0a0a;color:#fafafa}.shell{min-height:100vh;display:grid;place-items:center;padding:2rem}.container{width:100%;max-width:32rem;display:flex;flex-direction:column;gap:1.5rem}.header{text-align:center}.logo{display:inline-flex;align-items:center;justify-content:center;width:56px;height:56px;border-radius:16px;background:linear-gradient(135deg,var(--accent),#a855f7);color:#fff;margin-bottom:1rem}h1{margin:0 0 .25rem;font-size:1.75rem;font-weight:700;letter-spacing:-.03em}.subtitle{margin:0;color:var(--text-muted);font-size:.95rem}.input-group{display:flex;flex-direction:column;gap:.5rem}.label{font-size:.8rem;font-weight:500;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em}.label-sm{font-size:.7rem}.input-row{display:flex;gap:.5rem}.input{flex:1;padding:.75rem 1rem;font-size:.95rem;font-family:inherit;color:#fafafa;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);outline:none;transition:border-color .15s,box-shadow .15s}.input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}.input::placeholder{color:#ffffff40}.input:disabled{opacity:.5;cursor:not-allowed}.input-sm{padding:.5rem .75rem;font-size:.85rem}.samples{display:flex;flex-wrap:wrap;align-items:center;gap:.375rem;margin-top:.25rem}.samples-label{font-size:.75rem;color:var(--text-muted);margin-right:.25rem}.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.75rem 1.25rem;font-size:.9rem;font-weight:500;font-family:inherit;border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;transition:background .15s,border-color .15s,transform .1s;white-space:nowrap}.btn:active:not(:disabled){transform:scale(.97)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-primary{background:var(--accent);border-color:var(--accent);color:#fff}.btn-primary:hover:not(:disabled){background:var(--accent-hover);border-color:var(--accent-hover)}.btn-download{background:var(--accent);border-color:var(--accent);color:#fff;font-size:1rem;padding:.85rem 1.5rem}.btn-download:hover:not(:disabled){background:var(--accent-hover);border-color:var(--accent-hover);box-shadow:0 0 20px var(--accent-glow)}.btn-sample{padding:.35rem .75rem;font-size:.75rem;background:var(--surface);color:var(--text-muted);border-color:var(--border)}.btn-sample:hover:not(:disabled){background:var(--surface-hover);color:#fafafa;border-color:#fff3}.btn-ghost{background:transparent;border-color:transparent;color:var(--text-muted);font-size:.85rem;padding:.5rem 1rem}.btn-ghost:hover{color:#fafafa;background:var(--surface)}.spinner{width:16px;height:16px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.progress-section{display:flex;flex-direction:column;gap:.5rem}.progress-bar-track{height:6px;background:var(--surface);border-radius:3px;overflow:hidden}.progress-bar-fill{height:100%;background:linear-gradient(90deg,var(--accent),#a855f7);border-radius:3px;transition:width .3s ease;animation:progress-pulse 1.5s ease-in-out infinite}@keyframes progress-pulse{0%,to{opacity:1}50%{opacity:.7}}.progress-text{font-size:.8rem;color:var(--text-muted);text-align:center}.alert{display:flex;align-items:center;gap:.75rem;padding:.875rem 1rem;border-radius:var(--radius-sm);font-size:.9rem}.alert-error{background:var(--danger-bg);border:1px solid rgba(239,68,68,.25);color:#fca5a5}.preview-section{display:flex;flex-direction:column;gap:1.25rem}.video-wrapper{border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);background:#000}.video-player{width:100%;display:block;max-height:360px}.file-info{display:flex;gap:1.5rem}.info-item{display:flex;flex-direction:column;gap:.15rem}.info-label{font-size:.7rem;text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted)}.info-value{font-size:.9rem;font-weight:500;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;word-break:break-all}.action-row{display:flex;align-items:flex-end;gap:.75rem}.filename-input-group{flex:1;display:flex;flex-direction:column;gap:.35rem}