:root {
  --bg: #f5f5f4;
  --fg: #1c1917;
  --muted: #78716c;
  --accent: #06c755; /* LINE green */
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1917;
    --fg: #f5f5f4;
    --muted: #a8a29e;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 16px;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "PingFang TC", "Noto Sans TC", sans-serif;
}

.clock { text-align: center; }

.clock__label {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
}

.clock__time {
  margin: 0;
  font-size: clamp(3rem, 16vw, 7rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.clock__date {
  margin: 16px 0 4px;
  font-size: clamp(1.125rem, 4vw, 1.5rem);
}

.clock__tz {
  margin: 0;
  color: var(--muted);
  font-size: 0.875rem;
}

.clock__status {
  margin: 16px 0 0;
  color: #dc2626;
  font-size: 0.75rem;
}