:root {
  color-scheme: light dark;
  --brand: #5b3de3;
  --brand-soft: #ece6ff;
  --bg: #f3eeff;
  --surface: #ffffff;
  --text: #221a3d;
  --muted: #5d5680;
  --border: #ddd4fb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --brand: #a996ff;
    --brand-soft: #2c2259;
    --bg: #1c1540;
    --surface: #251c4f;
    --text: #f1edff;
    --muted: #b9b0e0;
    --border: #3a2f70;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Noto Sans", Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

header {
  background: linear-gradient(135deg, #5b3de3, #8a5cf6);
  color: #fff;
  padding: 40px 20px 32px;
  text-align: center;
}

header img {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
}

header h1 {
  margin: 12px 0 4px;
  font-size: 1.8rem;
  line-height: 1.2;
}

header p {
  margin: 0;
  opacity: 0.9;
}

nav {
  margin-top: 16px;
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
}

nav a {
  color: #fff;
  text-decoration: none;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.16);
  font-size: 0.9rem;
}

nav a[aria-current="page"] {
  background: rgba(255, 255, 255, 0.32);
  font-weight: 600;
}

main {
  max-width: 760px;
  margin: -16px auto 0;
  padding: 0 16px 48px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 28px 12px;
}

h2 {
  margin: 32px 0 8px;
  font-size: 1.25rem;
  color: var(--brand);
}

h2:first-child {
  margin-top: 0;
}

h3 {
  margin: 20px 0 6px;
  font-size: 1.05rem;
}

a {
  color: var(--brand);
}

ul,
ol {
  padding-left: 1.3em;
}

li {
  margin: 4px 0;
}

.meta {
  color: var(--muted);
  font-size: 0.95rem;
}

.note {
  background: var(--brand-soft);
  border-radius: 12px;
  padding: 14px 16px;
  margin: 16px 0;
}

.button {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  padding: 12px 22px;
  border-radius: 12px;
  margin: 8px 0 16px;
}

@media (prefers-color-scheme: dark) {
  .button {
    color: #1c1540;
  }
}

.links {
  list-style: none;
  padding: 0;
}

.links li {
  margin: 10px 0;
}

footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  padding: 0 16px 32px;
}

@media (max-width: 520px) {
  .card {
    padding: 20px 18px 6px;
  }

  header h1 {
    font-size: 1.5rem;
  }
}