:root {
  --bg: #f6f3fb;
  --surface: #ffffff;
  --text: #1a1224;
  --muted: #5a5266;
  --accent: #6b21a8;
  --accent-soft: #f3e8ff;
  --border: #e7dff2;
  --font: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(1100px 480px at 8% -8%, #efe6ff 0%, transparent 55%),
    radial-gradient(800px 360px at 100% 0%, #fce7f3 0%, transparent 48%),
    var(--bg);
  font-family: var(--font);
  line-height: 1.65;
}

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

a:hover {
  text-decoration-thickness: 2px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 10;
  font-family: var(--sans);
}

.brand {
  font-weight: 700;
  font-size: 1.2rem;
  text-decoration: none;
  color: var(--text);
  letter-spacing: -0.03em;
}

nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 1.15rem;
}

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

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

.doc {
  width: min(740px, calc(100% - 2rem));
  margin: 1.75rem auto 3rem;
  padding: 2rem 1.65rem 2.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 14px 44px rgba(55, 20, 90, 0.07);
}

h1 {
  margin: 0 0 0.35rem;
  font-size: clamp(1.85rem, 4vw, 2.35rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.doc > p:first-of-type {
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.95rem;
}

h2 {
  margin: 2.1rem 0 0.75rem;
  font-size: 1.32rem;
  letter-spacing: -0.02em;
}

h3 {
  margin: 1.35rem 0 0.5rem;
  font-size: 1.08rem;
}

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

p {
  margin: 0.75rem 0;
}

ul,
ol {
  margin: 0.5rem 0 1rem;
  padding-left: 1.35rem;
}

li {
  margin: 0.35rem 0;
}

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 1.75rem 0;
}

blockquote {
  margin: 1rem 0;
  padding: 0.35rem 0 0.35rem 1rem;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 8px 8px 0;
}

blockquote p {
  margin: 0.4rem 0;
  font-family: var(--sans);
  font-size: 0.95rem;
  color: var(--muted);
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: #f4eef9;
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-family: var(--sans);
  font-size: 0.92rem;
}

th,
td {
  border: 1px solid var(--border);
  padding: 0.65rem 0.75rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--accent-soft);
}

.footer-nav {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  font-family: var(--sans);
  color: var(--muted);
}

.site-footer {
  text-align: center;
  padding: 0 1rem 2.5rem;
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--muted);
}

.site-footer a {
  color: var(--muted);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--accent);
}

@media (max-width: 560px) {
  .doc {
    padding: 1.35rem 1.05rem 1.6rem;
    border-radius: 14px;
  }
}