:root {
  --bg: #0b0614;
  --panel: #0d0a1a;
  --card: #121127;
  --blue: #2e6bff;
  --blue2: #1a73e8;
  --text: #eaf0ff;
  --muted: #b6c3ff;
  --line: rgba(255, 255, 255, 0.08);
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: Inter, system-ui, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(
      1100px 520px at 10% -10%,
      rgba(46, 107, 255, 0.18),
      transparent 60%
    ),
    radial-gradient(
      900px 480px at 100% 0%,
      rgba(26, 115, 232, 0.22),
      transparent 55%
    ),
    var(--bg);
}
.wrap {
  max-width: 980px;
  margin: 32px auto;
  padding: 0 16px;
}
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-img {
  width: 42px;
  height: 42px;
  object-fit: contain;
  border-radius: 10px;
  background: #0f132b;
  padding: 6px;
  box-shadow: 0 8px 20px rgba(26, 115, 232, 0.35);
}
h1 {
  font-size: 28px;
  margin: 0;
}
.meta {
  color: var(--muted);
  font-size: 14px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
}
.toc {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 0 0 12px 0;
  padding: 0;
  list-style: none;
}
.toc a {
  display: inline-block;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  text-decoration: none;
}
.toc a:hover {
  border-color: var(--blue);
}
h2 {
  font-size: 20px;
  margin: 22px 0 8px;
}
p,
li {
  line-height: 1.7;
  color: #dfe6ff;
}
.note {
  background: #0e1633;
  border: 1px solid var(--line);
  padding: 12px 14px;
  border-radius: 12px;
  color: #cfdbff;
  margin: 12px 0;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 800;
  background: #1733ff;
  color: #fff;
  border: 1px solid transparent;
  box-shadow: 0 10px 22px rgba(46, 107, 255, 0.25);
}
.btn:hover {
  filter: brightness(1.07);
  transform: translateY(-1px);
}
hr {
  border: 0;
  height: 1px;
  background: var(--line);
  margin: 18px 0;
}
@media print {
  body {
    background: #fff;
    color: #000;
  }
  .card,
  .note {
    border: 1px solid #ccc;
  }
  .logo-img {
    background: #000;
  }
  .btn,
  .toc {
    display: none;
  }
  a {
    color: #000;
  }
}