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

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

body {
  font-family: 'Geist', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 14px;
  line-height: 1.65;
  color: #1c1917;
  background: #eae6df;
}

/* ── Layout ── */
.layout { display: flex; min-height: 100vh; }

nav {
  width: 240px;
  flex-shrink: 0;
  background: #1c1917;
  color: #9b8c7a;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  padding: 0 0 40px;
}

.nav-header {
  padding: 18px 18px 14px;
  border-bottom: 1px solid #3d3530;
}

.nav-title {
  font-size: 15px;
  font-weight: 600;
  color: #d97706;
  letter-spacing: 0.2px;
  margin-bottom: 4px;
}

.nav-subtitle {
  font-size: 11px;
  color: #7c6e5e;
}

.nav-switch {
  display: flex;
  gap: 6px;
  padding: 10px 12px;
  border-bottom: 1px solid #2d2824;
}

.nav-switch a {
  display: block;
  flex: 1;
  padding: 5px 8px;
  font-size: 11px;
  font-weight: 500;
  color: #9b8c7a;
  text-decoration: none;
  border-radius: 4px;
  border: 1px solid #3d3530;
  text-align: center;
  white-space: nowrap;
}

.nav-switch a:hover { background: #2d2824; color: #f0ebe4; }
.nav-switch a.active { background: #d97706; color: white; border-color: #b45309; }

nav a.nav-link {
  display: block;
  padding: 5px 18px;
  color: #9b8c7a;
  text-decoration: none;
  font-size: 13px;
}
nav a.nav-link:hover { color: #f0ebe4; background: #2d2824; }

nav .nav-section {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.7px;
  color: #7c6e5e;
  padding: 16px 18px 5px;
}

main {
  flex: 1;
  max-width: 880px;
  padding: 44px 52px 100px;
  background: #fafaf8;
}

/* ── Typography ── */
h1 { font-size: 26px; font-weight: 600; color: #1c1917; margin-bottom: 6px; }
h2 {
  font-size: 18px;
  font-weight: 600;
  color: #1c1917;
  margin: 48px 0 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid #e0d9cf;
  scroll-margin-top: 20px;
}
h3 {
  font-size: 14px;
  font-weight: 600;
  color: #3d3530;
  margin: 24px 0 8px;
  scroll-margin-top: 20px;
}
p { margin-bottom: 12px; color: #1c1917; }
ul, ol { margin: 0 0 14px 20px; }
li { margin-bottom: 5px; color: #1c1917; }
a { color: #d97706; text-decoration: none; }
a:hover { text-decoration: underline; }

.subtitle { color: #6b5e4e; font-size: 14px; margin-bottom: 32px; }

code {
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 12px;
  background: #f0ebe4;
  color: #1c1917;
  padding: 1px 5px;
  border-radius: 3px;
}

/* ── Callouts ── */
.callout {
  border-left: 3px solid #d97706;
  background: rgba(217,119,6,0.06);
  padding: 12px 16px;
  border-radius: 0 5px 5px 0;
  margin: 16px 0;
  font-size: 13px;
  color: #3d3530;
}
.callout.tip { border-color: #38a169; background: rgba(56,161,105,0.06); }
.callout.warning { border-color: #dd6b20; background: rgba(221,107,32,0.06); }

/* ── Keyboard ── */
kbd {
  display: inline-block;
  padding: 2px 7px;
  font-size: 11px;
  font-family: 'Geist Mono', ui-monospace, monospace;
  background: #f7f4ef;
  border: 1px solid #c8bfb2;
  border-radius: 4px;
  box-shadow: 0 1px 0 #b5a898;
  white-space: nowrap;
  color: #1c1917;
}

/* ── Tables ── */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0 22px;
  font-size: 13px;
}
th {
  text-align: left;
  padding: 8px 12px;
  background: #f0ebe4;
  border: 1px solid #ddd8d0;
  font-weight: 600;
  color: #3d3530;
}
td {
  padding: 7px 12px;
  border: 1px solid #ddd8d0;
  vertical-align: top;
  color: #1c1917;
}
tr:nth-child(even) td { background: #fafaf8; }

/* ── Symbol grid ── */
.symbol-grid {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 0;
  margin: 14px 0 24px;
  border: 1px solid #ddd8d0;
  border-radius: 5px;
  overflow: hidden;
  font-size: 13px;
}
.symbol-grid .sym-cell {
  padding: 10px 14px;
  border-bottom: 1px solid #e0d9cf;
  display: flex;
  align-items: center;
  background: #fff;
}
.symbol-grid .sym-cell:nth-child(4n+1),
.symbol-grid .sym-cell:nth-child(4n+2) { background: #fafaf8; }
.symbol-grid .sym-cell.icon { justify-content: center; border-right: 1px solid #e0d9cf; }
.symbol-grid .sym-cell:last-child,
.symbol-grid .sym-cell:nth-last-child(2) { border-bottom: none; }
.sym-name { font-weight: 600; color: #1c1917; }
.sym-desc { color: #6b5e4e; font-size: 12px; margin-top: 3px; line-height: 1.55; }

/* ── Numbered steps ── */
.steps { counter-reset: step; list-style: none; margin-left: 0; }
.steps li {
  counter-increment: step;
  padding: 9px 0 9px 38px;
  position: relative;
  border-bottom: 1px solid #f0ebe4;
  color: #1c1917;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 9px;
  width: 24px;
  height: 24px;
  background: #d97706;
  color: #fff;
  border-radius: 50%;
  font-size: 11px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ── Section intro ── */
.page-intro {
  font-size: 14px;
  color: #6b5e4e;
  margin-bottom: 32px;
  padding: 16px 20px;
  background: #f7f4ef;
  border-radius: 5px;
  border: 1px solid #e0d9cf;
  line-height: 1.7;
}

/* ── Definition lists ── */
dl { margin: 0 0 18px; }
dt { font-weight: 600; color: #1c1917; margin-top: 12px; }
dd { color: #6b5e4e; margin-left: 18px; font-size: 13px; line-height: 1.6; margin-bottom: 4px; }