:root {
  --bg: #0f1115;
  --panel: #171b22;
  --text: #eef2f8;
  --muted: #b8c2d1;
  --line: #303949;
  --accent: #6aa7e8;
  --accent-2: #94c7ff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: radial-gradient(circle at top left, #17263a 0, var(--bg) 38rem);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.55;
}
a { color: var(--accent-2); }
.site-header {
  max-width: 1120px;
  margin: 0 auto;
  padding: 24px 20px 12px;
}
.brand-wrap { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 42px; height: 42px; display: grid; place-items: center;
  border: 1px solid var(--accent); border-radius: 10px;
  color: var(--accent-2); font-weight: 700; background: #101923;
}
.brand-title { font-size: 22px; font-weight: 700; }
.brand-subtitle { color: var(--muted); font-size: 13px; }
.site-nav {
  display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px;
  border-top: 1px solid var(--line); padding-top: 12px;
}
.site-nav a {
  color: var(--text); text-decoration: none; padding: 7px 10px;
  border: 1px solid transparent; border-radius: 8px;
}
.site-nav a:hover { border-color: var(--line); background: #151b24; }
.page { max-width: 1120px; margin: 0 auto; padding: 26px 20px 44px; }
.hero {
  padding: 54px 28px; border: 1px solid var(--line); border-radius: 18px;
  background: linear-gradient(135deg, rgba(31, 38, 48, 0.94), rgba(15, 17, 21, 0.92));
  box-shadow: 0 12px 40px rgba(0,0,0,.28);
}
.badge {
  display: inline-block; padding: 5px 10px; border: 1px solid var(--accent);
  border-radius: 999px; color: var(--accent-2); font-size: 13px; margin-bottom: 14px;
}
h1 { margin: 0 0 14px; font-size: clamp(34px, 6vw, 56px); line-height: 1.05; }
h2 { margin-top: 28px; }
.lead { max-width: 760px; color: var(--muted); font-size: 20px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 26px; }
.button {
  display: inline-block; text-decoration: none; padding: 11px 16px;
  border-radius: 10px; font-weight: 700;
}
.button.primary { background: var(--accent); color: #06101b; }
.button.secondary { border: 1px solid var(--line); color: var(--text); background: #151b24; }
.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 18px; }
.card, .content-card, .notice {
  border: 1px solid var(--line); border-radius: 14px;
  background: rgba(23, 27, 34, 0.94); padding: 20px;
}
.notice { margin-top: 18px; }
.content-card { max-width: 920px; }
.content-card h1 { font-size: 38px; }
.small { color: var(--muted); font-size: 14px; }
pre {
  overflow-x: auto; padding: 12px; border-radius: 10px;
  background: #0c0f14; border: 1px solid var(--line);
}
code { color: #cfe4ff; }
hr { border: 0; border-top: 1px solid var(--line); margin: 28px 0; }
.site-footer {
  max-width: 1120px; margin: 0 auto; padding: 24px 20px 40px;
  color: var(--muted); border-top: 1px solid var(--line);
}
@media (max-width: 760px) {
  .cards { grid-template-columns: 1fr; }
  .hero { padding: 34px 20px; }
}

.features-list h2 { margin-top: 34px; }
.features-list ul { padding-left: 22px; }
.features-list li { margin: 6px 0; }