* { box-sizing: border-box; }
  html, body { margin: 0; background: var(--bg); color: var(--ink); }
  body { font: 16px/1.5 system-ui, -apple-system, "Segoe UI", "Noto Sans", "Noto Sans CJK TC", "PingFang HK", sans-serif; min-height: 100vh; }
  .wrap { max-width: 860px; margin: 0 auto; padding: 20px 16px 120px; }
  header { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
  h1 { font-size: 20px; margin: 0; letter-spacing: .01em; }
  .sub { color: var(--muted); font-size: 13px; }
  .bar { position: sticky; top: 0; z-index: 5; background: var(--bg); padding: 10px 0 12px; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; border-bottom: 1px solid var(--line); }
  button { font: inherit; cursor: pointer; border-radius: 10px; border: 1px solid var(--line); background: var(--panel); color: var(--ink); padding: 9px 14px; }
  button:hover { border-color: var(--muted); }
  button.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; min-width: 132px; }
  button.primary.live { background: var(--rec); border-color: var(--rec); color: #fff; }
  button:disabled { opacity: .5; cursor: default; }
  select { font: inherit; border-radius: 10px; border: 1px solid var(--line); background: var(--panel); color: var(--ink); padding: 9px 10px; }
  .meter { position: relative; flex: 1 1 120px; min-width: 100px; height: 10px; background: var(--chip); border-radius: 999px; }
  .meter > i { display: block; height: 100%; width: 0%; background: var(--accent); border-radius: 999px; }
  .meter > i.quiet { background: var(--muted); }               /* below the silence level: counted as silence */
  .meter > b { position: absolute; top: -4px; bottom: -4px; width: 2px; background: var(--rec); border-radius: 2px; left: 30%; }
  .settings { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; padding: 10px 0; font-size: 13px; color: var(--muted); border-bottom: 1px solid var(--line); }
  .settings label { display: inline-flex; align-items: center; gap: 8px; }
  .settings input[type=range] { width: 130px; accent-color: var(--accent); }
  .settings output { color: var(--ink); min-width: 4.2em; font-variant-numeric: tabular-nums; }
  .settings button { padding: 5px 10px; font-size: 13px; }
  .settings input[type=text], .settings input[type=password] { font: inherit; font-size: 13px; padding: 5px 9px; border-radius: 9px; border: 1px solid var(--line); background: var(--panel); color: var(--ink); }
  .settings a { color: var(--accent); }
  .pill { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); }
  .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--muted); }
  .dot.on { background: var(--ok); } .dot.rec { background: var(--rec); animation: pulse 1.2s infinite; } .dot.err { background: var(--rec); }
  @keyframes pulse { 50% { opacity: .35; } }
  #feed { margin-top: 16px; display: flex; flex-direction: column; gap: 12px; }
  .empty { color: var(--muted); text-align: center; padding: 48px 12px; border: 1px dashed var(--line); border-radius: 14px; }
  .card { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 12px 14px; }
  .meta { display: flex; gap: 8px; align-items: center; margin-bottom: 6px; font-size: 12px; color: var(--muted); flex-wrap: wrap; }
  .chip { background: var(--chip); border-radius: 999px; padding: 1px 9px; }
  .src { color: var(--muted); font-size: 15px; word-break: break-word; }
  .tr { font-size: 19px; margin-top: 6px; word-break: break-word; min-height: 1.5em; }
  .tr.cursor::after { content: "▍"; color: var(--cursor); animation: pulse 1s infinite; margin-left: 1px; }
  .err { color: var(--rec); font-size: 14px; }
  .note { background: var(--chip); border-radius: 12px; padding: 10px 12px; font-size: 14px; margin-top: 12px; display: none; }
  footer { margin-top: 24px; color: var(--muted); font-size: 12px; }
  @media (max-width: 520px) { .tr { font-size: 17px; } }

.back { margin-left: auto; color: var(--muted); font-size: .85rem; }