@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@300;400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
  color-scheme: light;
  --bg: #f1f5f9;
  --bg-dot: rgba(148, 163, 184, 0.24);
  --font-title: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --soft: #64748b;
  --border: #dbe4ef;
  --accent: #2563eb;
  --accent-soft: #e6efff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'IBM Plex Sans', ui-sans-serif, system-ui, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';
  background-color: var(--bg);
  background-image: radial-gradient(circle at 1px 1px, var(--bg-dot) 1px, transparent 1.1px);
  background-size: 10px 10px;
  color: var(--text);
  line-height: 1.6;
  padding: 32px 16px 56px;
}

code,
kbd,
pre,
samp {
  font-family: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
}

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

a:hover {
  text-decoration: underline;
}

.page {
  max-width: 860px;
  margin: 0 auto;
}

.topbar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 16px;
  color: var(--soft);
  font-size: 14px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 24px;
}

h1 {
  margin: 0 0 10px;
  font-size: 34px;
  line-height: 1.15;
  font-family: var(--font-title);
  letter-spacing: -0.01em;
}

.lead {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 18px;
}

.cta-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 0 0 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  padding: 9px 13px;
  font-size: 14px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  font-weight: 600;
}

.btn.primary {
  background: var(--text);
  border-color: var(--text);
  color: #fff;
}

.btn.primary:hover {
  text-decoration: none;
  background: var(--text);
  border-color: var(--text);
  color: #fff;
  opacity: 0.92;
}

.btn:not(.primary):hover {
  text-decoration: none;
  background: #f8fafc;
}

h2 {
  margin: 24px 0 8px;
  font-size: 24px;
  font-weight: 600;
}

h3 {
  font-weight: 600;
}

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

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

.grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 12px;
}

.tile {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 6px;
  padding: 12px;
}

.tile h3 {
  margin: 0 0 6px;
  font-size: 16px;
}

.note {
  margin-top: 16px;
  background: var(--accent-soft);
  border: 1px solid #c9dcff;
  border-radius: 6px;
  padding: 12px;
  color: #153067;
}

.related {
  margin-top: 20px;
  border-top: 1px dashed var(--border);
  padding-top: 14px;
}

.footer {
  margin-top: 22px;
  color: var(--soft);
  font-size: 13px;
}

@media (max-width: 700px) {
  h1 {
    font-size: 28px;
  }

  .lead {
    font-size: 16px;
  }

  .card {
    padding: 18px;
  }

  .grid {
    grid-template-columns: 1fr;
  }
}