:root {
  color-scheme: dark;
  --background: #000;
  --text: #fff;
}

* { box-sizing: border-box; }

html,
body {
  height: 100%;
}

body {
  margin: 0;
  overflow: hidden;
  background: var(--background);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.screen {
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(18px, 4vh, 56px);
  padding: clamp(20px, 4vw, 72px);
  text-align: center;
}

.clock {
  display: block;
  font-size: clamp(5rem, 17vw, 19rem);
  font-weight: 800;
  line-height: 0.9;
  letter-spacing: 0;
  font-variant-numeric: tabular-nums;
}

.date {
  display: block;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2rem, 5.8vw, 7rem);
  font-weight: 650;
  line-height: 1;
  letter-spacing: 0;
  font-variant-numeric: tabular-nums;
}