:root {
  --bg: #f5f8fc;
  --surface: #ffffff;
  --text: #17212e;
  --text-soft: #56657a;
  --accent: #0B5FA5;
  --accent-soft: #e7eefb;
  --border: #e1e7f0;
  --code-bg: #eef2f8;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 1.5rem 5rem;
}

header.site-head {
  background: linear-gradient(135deg, #5B9DEE, #1B4FA6);
  padding: 1.5rem;
  margin-bottom: 2.5rem;
}

header.site-head .inner {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: #fff;
  text-decoration: none;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: rgba(255,255,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
}

.brand-name {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

nav.site-nav {
  display: flex;
  gap: 1.1rem;
  flex-wrap: wrap;
}

nav.site-nav a {
  color: rgba(255,255,255,0.9);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
}

nav.site-nav a:hover { text-decoration: underline; }

h1 {
  font-size: clamp(1.8rem, 4vw, 2.3rem);
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0 0 0.5rem;
}

h2 {
  font-size: 1.4rem;
  margin: 2.2rem 0 0.8rem;
  color: var(--accent);
}

h3 {
  font-size: 1.1rem;
  margin: 1.5rem 0 0.6rem;
}

p { margin: 0 0 1rem; }

.lede {
  font-size: 1.1rem;
  color: var(--text-soft);
  margin-bottom: 2rem;
}

ul, ol { margin: 0 0 1rem; padding-left: 1.3rem; }
li { margin-bottom: 0.4rem; }

a { color: var(--accent); }

code {
  font-family: ui-monospace, 'JetBrains Mono', Consolas, monospace;
  background: var(--code-bg);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
}

pre {
  background: var(--code-bg);
  padding: 1rem 1.1rem;
  border-radius: 8px;
  overflow-x: auto;
  font-family: ui-monospace, 'JetBrains Mono', Consolas, monospace;
  font-size: 0.92em;
  line-height: 1.6;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem;
  font-size: 0.95rem;
}

th, td {
  text-align: left;
  padding: 0.55rem 0.7rem;
  border-bottom: 1px solid var(--border);
}

th { color: var(--text-soft); font-weight: 600; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.02em; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.3rem 1.5rem;
  margin: 1.2rem 0;
}

.note {
  background: var(--accent-soft);
  border-radius: 10px;
  padding: 1rem 1.2rem;
  font-size: 0.95rem;
  margin: 1.2rem 0;
}

.cta {
  display: inline-block;
  background: var(--accent);
  color: #fff !important;
  text-decoration: none;
  font-weight: 600;
  padding: 0.85rem 1.6rem;
  border-radius: 8px;
  margin-top: 0.5rem;
}

footer.site-foot {
  margin-top: 3.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-soft);
}

footer.site-foot a { color: var(--text-soft); }

@media (max-width: 480px) {
  header.site-head .inner { flex-direction: column; align-items: flex-start; }
}