:root {
  --bg: #0b1220;
  --bg-soft: #121b2e;
  --panel: #111827;
  --line: #25324a;
  --text: #e5edf8;
  --muted: #9db0cd;
  --brand: #5ec1ff;
  --brand-2: #7ce38b;
  --danger: #ff8d8d;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: radial-gradient(circle at top right, #152646 0%, var(--bg) 42%), var(--bg);
  color: var(--text);
  font-family: "SF Pro Text", "PingFang SC", "Helvetica Neue", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

a {
  color: var(--brand);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.page {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 20px 60px;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  margin-bottom: 22px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(180deg, #152138, #0f172a);
}

.brand {
  font-weight: 700;
  letter-spacing: 0.2px;
  color: #f4f8ff;
  margin-right: 10px;
}

.nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.nav a {
  font-size: 14px;
  color: var(--muted);
}

.nav a.active {
  color: var(--brand);
  font-weight: 600;
}

.card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(180deg, #0f172a, #0d1526);
  padding: 22px;
}

h1 {
  margin-top: 0;
  margin-bottom: 6px;
  line-height: 1.25;
  font-size: 30px;
}

h2 {
  margin-top: 28px;
  margin-bottom: 8px;
  color: #f1f6ff;
  font-size: 21px;
}

h3 {
  margin-top: 18px;
  margin-bottom: 6px;
  font-size: 16px;
}

.meta {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 18px;
}

p,
li {
  color: var(--text);
}

ul,
ol {
  padding-left: 20px;
}

.note,
.warn,
.success {
  border-left: 4px solid var(--brand);
  padding: 10px 12px;
  margin: 14px 0;
  background: #0e1a30;
  border-radius: 8px;
  color: #d7e7ff;
}

.warn {
  border-left-color: #ffca6a;
  background: #261f0f;
}

.success {
  border-left-color: var(--brand-2);
  background: #102416;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 10px;
  text-align: left;
  font-size: 14px;
}

th {
  color: #d5e5ff;
  background: #101b30;
}

td {
  color: #d4deee;
}

code {
  background: #0a1222;
  border: 1px solid #22314e;
  border-radius: 6px;
  padding: 1px 5px;
  font-family: "JetBrains Mono", "SFMono-Regular", Menlo, Monaco, Consolas, monospace;
  font-size: 13px;
}

footer {
  margin-top: 20px;
  color: var(--muted);
  font-size: 13px;
}

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 26px 0;
}

@media (max-width: 700px) {
  .page {
    padding: 18px 14px 40px;
  }

  h1 {
    font-size: 24px;
  }

  h2 {
    font-size: 19px;
  }

  .card {
    padding: 16px;
  }
}