:root {
  --violet: #6D28D9;
  --violet-light: #A78BFA;
  --ink: #1c1c27;
  --muted: #5b5b6b;
  --bg: #faf9fc;
  --card: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #ececf2;
    --muted: #a3a3b4;
    --bg: #0d0d14;
    --card: #17171f;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
}
header {
  background: linear-gradient(135deg, var(--violet), #0d6e78);
  color: #fff;
  padding: 48px 24px 40px;
  text-align: center;
}
header .shield { font-size: 44px; }
header h1 { margin: 8px 0 4px; font-size: 32px; letter-spacing: -0.5px; }
header p { margin: 0; opacity: 0.85; }
header a { color: #fff; opacity: 0.9; }
nav { margin-top: 14px; }
nav a {
  color: #fff; text-decoration: none; font-weight: 600;
  margin: 0 10px; opacity: 0.9; font-size: 15px;
}
nav a:hover { opacity: 1; text-decoration: underline; }
main { max-width: 720px; margin: 0 auto; padding: 32px 24px 64px; }
.card {
  background: var(--card);
  border-radius: 16px;
  padding: 24px 28px;
  margin: 20px 0;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
h2 { font-size: 20px; margin: 0 0 10px; color: var(--violet); }
@media (prefers-color-scheme: dark) { h2 { color: var(--violet-light); } }
p, li { color: var(--ink); }
.muted { color: var(--muted); font-size: 14px; }
a { color: var(--violet); }
@media (prefers-color-scheme: dark) { a { color: var(--violet-light); } }
footer { text-align: center; padding: 24px; }