:root{font-family:Inter,system-ui,-apple-system,"Segoe UI","Noto Sans TC",sans-serif;color-scheme:dark;--bg:#0b1120;--panel:#142238;--line:#2a3d53;--txt:#eff6ff;--muted:#9fb0c7;--accent:#49c6bc}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(ellipse at 9% 0%,#183149 0,transparent 46%),linear-gradient(145deg,#0b1120,#10192a 70%);color:var(--txt)}.shell{max-width:1400px;margin:auto;padding:24px}.site-header{display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--line);padding-bottom:24px;margin-bottom:32px}.logo{display:grid;place-items:center;width:44px;height:44px;border-radius:13px;background:var(--accent);color:#082d30;font-size:26px;font-weight:900}.site-header h1{font-size:18px;letter-spacing:.16em;margin:0}.site-header small{color:var(--muted)}.tag{margin-left:auto;font-size:12px;color:var(--muted)}h2{font-size:26px}.subtitle,.fine{color:var(--muted);line-height:1.7}.fine{font-size:12px}.layout{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(340px,.8fr);gap:22px;margin-top:24px}.card{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:22px;min-width:0}.card h3{margin-top:0}.preview{position:relative;background:#07111e;border-radius:12px;min-height:280px;display:grid;place-items:center;overflow:hidden}.preview video{display:block;width:100%;max-height:490px;object-fit:contain}.view-tag{position:absolute;bottom:10px;left:10px;border-radius:7px;padding:6px 10px;font-size:12px;background:#000b}.actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:15px}button,a.download{cursor:pointer;font:inherit;font-weight:700;border-radius:10px;padding:11px 14px;background:#223550;color:var(--txt);border:1px solid #37516b;text-align:center;text-decoration:none}button.primary,a.primary{background:var(--accent);color:#072e32;border-color:var(--accent)}button.danger{border-color:#9d5960}button:disabled{opacity:.4;cursor:not-allowed}.message{min-height:44px;border-left:3px solid var(--accent);padding:10px 13px;background:#0b1b2b;line-height:1.6;word-break:break-word}.message[data-kind=error]{border-color:#ec8383}.message[data-kind=success]{border-color:#52d2a4}.data{display:grid;grid-template-columns:1fr 1fr;gap:16px 12px}.data div{min-width:0;color:var(--muted);font-size:12px}.data strong{display:block;color:var(--txt);font-size:15px;margin-top:5px;overflow-wrap:anywhere}.meter{margin:26px 0}.meter>div{display:flex;justify-content:space-between}.meter progress{width:100%;height:16px;accent-color:var(--accent);margin-top:10px}label{display:block;color:#c7d6e7;font-size:13px;margin:16px 0 8px}textarea{display:block;width:100%;height:92px;resize:vertical;background:#101c2f;border:1px solid var(--line);border-radius:9px;padding:12px;color:var(--txt);font-family:ui-monospace,monospace}.card>button{margin-top:12px}.download{display:block;margin-top:12px}[hidden]{display:none!important}footer{margin-top:30px;color:#8394aa;font-size:12px}@media(max-width:850px){.shell{padding:14px}.layout{grid-template-columns:1fr}.card{padding:16px}.site-header h1{font-size:15px}.tag{font-size:11px}.preview{min-height:240px}}

/* iOS Safari safe area and touch controls */
@supports(padding:max(0px)){.shell{padding-bottom:max(24px,env(safe-area-inset-bottom))}}button{touch-action:manipulation}.preview video{background:#07111e}