:root {
  --bg: #0b0e14;
  --card: #151a23;
  --card2: #1b212d;
  --line: #283040;
  --fg: #e6e9ef;
  --mut: #9aa4b2;
  --accent: #5b8cff;
  --rec: #ff4d5e;
  --ok: #36d399;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: radial-gradient(1200px 600px at 50% -10%, #18213a 0%, var(--bg) 55%);
  color: var(--fg);
  font: 16px/1.6 system-ui, -apple-system, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  min-height: 100vh;
}
.wrap { max-width: 880px; margin: 0 auto; padding: 32px 18px 60px; }
header h1 { font-size: 30px; margin: 0 0 6px; display: flex; align-items: center; gap: 10px; }
header .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 12px var(--ok); }
.sub { color: var(--mut); margin: 0 0 22px; }
.sub strong { color: var(--fg); }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 16px;
}
.card h2 { font-size: 16px; margin: 0 0 12px; display: flex; align-items: baseline; gap: 8px; }
.card h2 small { color: var(--accent); font-weight: 600; font-size: 12px; }

.record .controls { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
button.rec {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--rec); color: #fff; border: 0; border-radius: 999px;
  padding: 13px 22px; font-size: 16px; font-weight: 700; cursor: pointer;
  transition: transform .08s ease, filter .15s ease;
}
button.rec:hover { filter: brightness(1.07); }
button.rec:active { transform: scale(.97); }
button.rec[disabled] { opacity: .5; cursor: not-allowed; }
button.rec .ico { width: 14px; height: 14px; border-radius: 3px; background: #fff; }
button.rec.recording { background: var(--card2); border: 1px solid var(--rec); }
button.rec.recording .ico { border-radius: 50%; background: var(--rec); animation: pulse 1.1s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .35; } }

.timer { font-variant-numeric: tabular-nums; font-size: 20px; color: var(--mut); min-width: 64px; }
.toggle { display: inline-flex; align-items: center; gap: 8px; color: var(--mut); font-size: 14px; cursor: pointer; }
.toggle input { width: 16px; height: 16px; accent-color: var(--accent); }

.meter { height: 6px; background: var(--card2); border-radius: 4px; margin: 16px 0 10px; overflow: hidden; }
#meterBar { height: 100%; width: 0%; background: linear-gradient(90deg, var(--accent), var(--ok)); transition: width .08s linear; }
.status { color: var(--mut); margin: 4px 0 0; font-size: 14px; min-height: 20px; }
.status.err { color: var(--rec); }
.status.busy::after { content: "…"; animation: dots 1s steps(4) infinite; }

.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 680px) { .grid { grid-template-columns: 1fr; } }
.box {
  background: var(--card2); border: 1px solid var(--line); border-radius: 10px;
  padding: 14px; min-height: 120px; white-space: pre-wrap; word-break: break-word;
  font-size: 15px;
}
.box:empty::before { content: "—"; color: var(--mut); }

.play audio { width: 100%; margin-top: 4px; }

.facts .cer { display: flex; gap: 24px; flex-wrap: wrap; }
.facts .cer div { display: flex; flex-direction: column; }
.facts .cer b { font-size: 26px; color: var(--ok); }
.facts .cer span { color: var(--mut); font-size: 13px; }
.facts .note { color: var(--mut); font-size: 13px; margin: 12px 0 0; }
.facts code { background: var(--card2); padding: 1px 6px; border-radius: 5px; }

footer { color: var(--mut); font-size: 12px; text-align: center; margin-top: 28px; }
@keyframes dots { to { content: ""; } }