:root {
  --accent: #00d4ff;
  --bg: #0a0a0f;
  --surface: #12121a;
  --text-primary: #f0f0f5;
  --text-secondary: #6b6b80;
  --transition-duration: 180ms;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
}

body {
  background-color: var(--bg);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', system-ui, sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.clock-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 1.5rem);
  padding: clamp(2rem, 6vw, 5rem);
  background: var(--surface);
  border-radius: clamp(1rem, 3vw, 2rem);
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow:
    0 0 0 1px rgba(0, 212, 255, 0.04),
    0 32px 64px rgba(0, 0, 0, 0.6),
    0 0 80px rgba(0, 212, 255, 0.04);
  width: min(90vw, 640px);
}

.brand {
  font-size: clamp(0.95rem, 3vw, 1.4rem);
  font-weight: 300;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  line-height: 1;
}

.brand-name {
  color: var(--text-primary);
}

.brand-os {
  color: var(--accent);
  text-shadow:
    0 0 12px rgba(0, 212, 255, 0.7),
    0 0 28px rgba(0, 212, 255, 0.3);
}

.time-display {
  display: flex;
  align-items: center;
  gap: 0.1em;
  font-size: clamp(3.5rem, 14vw, 8rem);
  font-weight: 200;
  letter-spacing: -0.02em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--text-primary);
}

.time-part {
  display: inline-block;
}

.time-separator {
  color: var(--accent);
  opacity: 0.5;
  align-self: center;
  padding-bottom: 0.05em;
  font-weight: 100;
}

.seconds {
  color: var(--accent);
  display: inline-block;
  transition:
    opacity var(--transition-duration) ease,
    transform var(--transition-duration) ease;
}

.seconds.tick {
  opacity: 0.3;
  transform: scale(0.94);
}

.date-display {
  font-size: clamp(0.85rem, 2.5vw, 1.1rem);
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.accent-line {
  width: clamp(2rem, 8vw, 4rem);
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  border-radius: 1px;
  opacity: 0.6;
}

.weather-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4em;
}

.weather-location {
  font-size: clamp(0.65rem, 1.8vw, 0.8rem);
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.weather-row {
  display: flex;
  align-items: baseline;
  gap: 0.45em;
  font-size: clamp(0.9rem, 2.5vw, 1.1rem);
}

.weather-temp {
  font-weight: 300;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

.weather-sep {
  color: var(--text-secondary);
  opacity: 0.4;
}

.weather-condition {
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
}