:root {
  color-scheme: light dark;
  --bg: #0f1115;
  --fg: #e7ecf3;
  --muted: #98a2b3;
  --card: #181b22;
  --accent: #6ea8fe;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.container {
  max-width: 640px;
  margin: 0 auto;
  padding: 64px 24px 48px;
}

header h1 {
  margin: 0 0 8px;
  font-size: 32px;
  letter-spacing: -0.02em;
}

.tag {
  margin: 0;
  color: var(--muted);
}

.card {
  margin: 32px 0;
  padding: 24px;
  background: var(--card);
  border-radius: 12px;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04) inset;
}

.card h2 {
  margin: 0 0 8px;
  font-size: 20px;
}

button {
  margin-top: 16px;
  padding: 10px 16px;
  font-size: 14px;
  color: #0f1115;
  background: var(--accent);
  border: 0;
  border-radius: 8px;
  cursor: pointer;
}

button:hover { filter: brightness(1.05); }

footer {
  margin-top: 48px;
  text-align: center;
  color: var(--muted);
}