:root {
  --bg: #faf9f5;
  --surface: #ffffff;
  --ink: #141413;
  --muted: #6b6a64;
  --line: #e7e4dc;
  --accent: #d97757;
  --accent-soft: #f5e4dc;
  --code-bg: #171715;
  --code-ink: #e8e6df;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  font-size: 15.5px;
}

.layout { display: flex; min-height: 100vh; }

/* ---------- Sidebar ---------- */
.sidebar {
  width: 264px;
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--line);
  padding: 20px 16px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: 40;
}

.sidebar-head { padding: 4px 8px 16px; border-bottom: 1px solid var(--line); margin-bottom: 12px; }

.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand-logo { height: 26px; width: auto; }
.brand-name { font-size: 17px; font-weight: 700; letter-spacing: -0.01em; color: var(--ink); }

.nav-group { margin-bottom: 18px; }
.nav-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  padding: 0 8px;
  margin-bottom: 6px;
}
.nav-link {
  display: block;
  padding: 6px 8px;
  border-radius: 7px;
  color: var(--ink);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
}
.nav-link:hover { background: var(--bg); }
.nav-link.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

/* ---------- Content ---------- */
.content {
  flex: 1;
  max-width: 860px;
  padding: 48px 56px 96px;
}

.menu-btn {
  display: none;
  position: sticky;
  top: 16px;
  z-index: 50;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 18px;
  padding: 6px 12px;
  cursor: pointer;
}

h1 { font-size: 30px; font-weight: 700; letter-spacing: -0.02em; margin: 0 0 8px; }
h2 { font-size: 21px; font-weight: 700; margin: 40px 0 10px; letter-spacing: -0.01em; }
h3 { font-size: 16.5px; font-weight: 600; margin: 26px 0 8px; }

p { margin: 10px 0; color: #33322e; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

ul, ol { margin: 10px 0 10px 22px; }
li { margin: 4px 0; color: #33322e; }

.lead { font-size: 17px; color: var(--muted); margin-bottom: 24px; }

code {
  font-family: "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  font-size: 13.5px;
  background: #efece4;
  color: #b04a2f;
  padding: 2px 6px;
  border-radius: 5px;
}

pre {
  background: var(--code-bg);
  color: var(--code-ink);
  border-radius: 10px;
  padding: 18px 20px;
  overflow-x: auto;
  margin: 14px 0;
  font-size: 13.5px;
  line-height: 1.55;
}
pre code { background: none; color: inherit; padding: 0; font-size: inherit; }
pre .cmt { color: #8a8f98; }
pre .str { color: #9cdc9c; }
pre .kwd { color: #d97757; }
pre .num { color: #b5cea8; }
pre .fn { color: #7ec7e2; }

.note {
  background: #fdf3ee;
  border: 1px solid #f0d5c8;
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  padding: 12px 16px;
  margin: 16px 0;
  font-size: 14px;
}
.note strong { color: #b04a2f; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}
th {
  text-align: left;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  background: var(--bg);
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
}
td { padding: 10px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
tr:last-child td { border-bottom: none; }
td code { white-space: nowrap; }

.pill {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 600;
  padding: 2px 9px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
}

.back-link { display: inline-block; margin-top: 40px; font-size: 14px; }

/* ---------- Mobile ---------- */
@media (max-width: 900px) {
  .sidebar { position: fixed; left: -280px; transition: left 0.25s ease; }
  .sidebar.open { left: 0; }
  .backdrop {
    display: none;
    position: fixed; inset: 0;
    background: rgba(20,20,19,0.4);
    z-index: 35;
  }
  .backdrop.show { display: block; }
  .menu-btn { display: inline-block; }
  .content { padding: 24px 22px 80px; }
  h1 { font-size: 25px; }
}