:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #242830;
  background: #f7f8fa;
  -webkit-font-smoothing: antialiased;
}

* { box-sizing: border-box; }
body { margin: 0; }

main {
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: 32px 20px;
}

.countdown { text-align: center; }

.timer {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: clamp(8px, 2.2vw, 24px);
}

.unit { display: grid; gap: 18px; }

.digits, .separator {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: clamp(40px, 10vw, 96px);
  font-weight: 400;
  font-variant-numeric: tabular-nums;
  line-height: 1;
  letter-spacing: -0.045em;
}

.digits { min-width: 2ch; }
.separator { color: #b8bdc6; }
.label { font-size: 13px; line-height: 1.5; color: #9298a3; }

h1 {
  margin: 38px 0 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: 0.1em;
  color: #6f7682;
}

.status-dot { width: 6px; height: 6px; border-radius: 50%; background: #9aa6a0; }
noscript p { max-width: 28em; font-size: 14px; line-height: 1.7; color: #6f7682; }