:root {
  --bg: #4b2a8a;
  --card: #ffffff;
  --text: #222222;
  --subtle: #666666;
  --accent: #6b3fa0;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans",
    "Yu Gothic", sans-serif;
  background: linear-gradient(180deg, #6b3fa0 0%, #3a1f6b 100%);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}
.card {
  background: var(--card);
  border-radius: 18px;
  padding: 28px 24px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
}
header h1 {
  color: #fff;
  font-size: 32px;
  margin: 0 0 4px;
}
header .sub { color: rgba(255,255,255,.75); font-size: 14px; margin-bottom: 20px; }
nav a {
  color: #fff;
  text-decoration: none;
  margin-right: 14px;
  font-size: 14px;
  border-bottom: 1px solid rgba(255,255,255,.4);
}
nav a:hover { border-bottom-color: #fff; }
h2 { color: var(--accent); font-size: 20px; margin-top: 28px; }
h3 { font-size: 16px; margin-top: 18px; }
p, li { line-height: 1.7; font-size: 15px; }
.muted { color: var(--subtle); font-size: 12px; }
.lang { float: right; font-size: 13px; }
.lang a { color: rgba(255,255,255,.85); }
footer {
  margin-top: 36px;
  text-align: center;
  color: rgba(255,255,255,.55);
  font-size: 12px;
}