:root {
  color-scheme: light;
  --bg: #0c0c0c;
  --card: #151515;
  --text: #f5f5f5;
  --muted: #bdbdbd;
  --accent: #ff2b2b;
  --border: #2a2a2a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Space Grotesk", "Inter", "Helvetica Neue", Arial, sans-serif;
  background: radial-gradient(circle at top, #2b0b0b 0%, #0c0c0c 40%, #0a0a0a 100%);
  color: var(--text);
  line-height: 1.6;
}

main {
  max-width: 900px;
  margin: 40px auto 80px;
  padding: 0 20px;
}

header {
  text-align: center;
  margin-bottom: 32px;
}

header h1 {
  font-size: 32px;
  letter-spacing: 2px;
  margin-bottom: 8px;
}

header p {
  color: var(--muted);
  margin: 0;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3);
}

h2 {
  font-size: 20px;
  margin-top: 26px;
}

p {
  margin: 10px 0;
}

ul {
  margin: 8px 0 8px 20px;
}

hr {
  border: none;
  border-top: 1px dashed #3a3a3a;
  margin: 36px 0;
}

nav {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 12px;
}

nav a {
  color: var(--text);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  transition: border-color 0.2s ease, color 0.2s ease;
}

nav a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

footer {
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  margin-top: 24px;
}

@media (max-width: 640px) {
  header h1 {
    font-size: 26px;
  }

  .card {
    padding: 20px;
  }
}