:root {
  --bg: #ffffff;
  --text: #1c1d29;
  --muted: #5b5d70;
  --accent: #6f6fe0;
  --border: #e3e3f0;
  --grad: linear-gradient(90deg, #4fd8c4, #7b7fe0);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1d29;
    --text: #f0f0f7;
    --muted: #a9abc0;
    --accent: #b3b5f5;
    --border: #34364a;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.55;
  overflow-x: hidden;
}
main, header, footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px;
}
header { padding-top: 16px; text-align: right; }
.lang a { color: var(--muted); text-decoration: none; padding: 4px 6px; }
.lang a[aria-current="page"] { color: var(--accent); font-weight: 700; }
main { padding-top: 24px; padding-bottom: 24px; text-align: center; }
.icon { width: 96px; height: 96px; border-radius: 22px; }
h1 {
  margin: 16px 0 4px;
  font-size: 2.6rem;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.tagline { margin: 0 0 16px; font-size: 1.2rem; font-weight: 600; }
.desc { margin: 0 auto 24px; color: var(--muted); }
ul { list-style: none; margin: 0 0 32px; padding: 0; text-align: left; }
li {
  padding: 12px 16px 12px 20px;
  margin-bottom: 10px;
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
}
.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 12px;
  background: var(--accent);
  color: var(--bg);
  font-weight: 700;
  opacity: 0.55;
  cursor: default;
}
footer {
  padding-top: 24px;
  padding-bottom: 32px;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
}
footer a { color: var(--accent); }