body {
  margin: 0;
  background: radial-gradient(circle at top, #0f172a, #05070f);
  color: #e5e7eb;
  font-family: system-ui, Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.app {
  width: min(100% - 32px, 640px);
  padding: 32px 0;
  box-sizing: border-box;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 25px;
  align-items: center;
}

.header h1 {
  font-size: 42px;
  letter-spacing: 4px;
  margin: 0;
}

.subtitle {
  color: #94a3b8;
  margin-top: 8px;
}

.decimal-info {
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 1.5px;
  color: rgba(255, 255, 255, 0.45);
  text-transform: uppercase;
}

.clock-card {
  width: 100%;
  box-sizing: border-box;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 30px 60px;
  border-radius: 16px;
  backdrop-filter: blur(10px);
  box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}

#nemoClock {
  font-size: 64px;
  letter-spacing: 6px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.info {
  width: 100%;
  max-width: 420px;
  text-align: left;
}

details {
  background: rgba(255,255,255,0.03);
  padding: 12px 16px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.08);
}

a,
a:visited,
a:link {
  color: #7f9bbd;
  text-decoration: none;
  border-bottom: 1px solid rgba(127,155,189,0.4);
}

a:hover {
  color: #b8cbe0;
  border-bottom-color: #b8cbe0;
}

@media (max-width: 520px) {
  .header h1 {
    font-size: 34px;
  }

  .decimal-info {
    font-size: 10px;
    letter-spacing: 1px;
  }

  .clock-card {
    padding: 26px 20px;
  }

  #nemoClock {
    font-size: 48px;
    letter-spacing: 4px;
  }
}