:root {
  --ink: #1a2332;
  --muted: #5a6578;
  --line: #e4e8ef;
  --bg: #f7f8fb;
  --card: #ffffff;
  --accent: #1e90ff;
  --crest: #8b1a1a;
  --max: 48rem;
  --font: "Manrope", system-ui, -apple-system, sans-serif;
  --display: "Barlow Condensed", var(--font);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.65;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  color: #0b6fd1;
}

.top {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: rgba(247, 248, 251, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: 0.04em;
}

.brand__logo {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

.nav a[aria-current="page"],
.nav a:hover {
  color: var(--ink);
}

.doc {
  max-width: calc(var(--max) + 3rem);
  margin: 0 auto;
  padding: 28px 20px 64px;
}

.prose {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px 24px 36px;
  box-shadow: 0 8px 30px rgba(26, 35, 50, 0.04);
}

.prose h1 {
  margin: 0 0 1rem;
  font-family: var(--display);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  line-height: 1.15;
  letter-spacing: 0.02em;
}

.prose h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.2rem;
  line-height: 1.3;
}

.prose h3 {
  margin: 1.5rem 0 0.5rem;
  font-size: 1.05rem;
}

.prose p,
.prose li {
  color: var(--ink);
}

.prose ul {
  padding-left: 1.25rem;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem;
}

.prose th,
.prose td {
  border: 1px solid var(--line);
  padding: 0.6rem 0.75rem;
  text-align: left;
}

.prose th {
  background: var(--bg);
}

.foot {
  max-width: calc(var(--max) + 3rem);
  margin: 0 auto;
  padding: 0 20px 40px;
  color: var(--muted);
  font-size: 0.9rem;
}

.foot p {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
}

.foot img {
  width: 18px;
  height: 18px;
  object-fit: contain;
}

@media (max-width: 640px) {
  .prose {
    padding: 22px 16px 28px;
    border-radius: 12px;
  }
}