/* =============================================================================
   Demo Page Layout
   ============================================================================= */

:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Fira Code', 'SF Mono', 'Consolas', monospace;
}

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

body {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.6;
  color: #1a1a1a;
  background: #faf9f7;
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}

header {
  margin-bottom: 24px;
  border-bottom: 2px solid #e8e6e0;
  padding-bottom: 16px;
}

header h1 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.subtitle {
  color: #666;
  font-size: 14px;
  margin-top: 4px;
}

/* ── Tab navigation (pure CSS) ── */

.tabs { position: relative; }
.tabs input[type="radio"] { display: none; }
.tabs label {
  display: inline-block;
  padding: 8px 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: 13px;
  color: #666;
  border-bottom: 2px solid transparent;
  margin-right: 4px;
}
.tabs input[type="radio"]:checked + label {
  color: #1a1a1a;
  border-bottom-color: #1a1a1a;
}
.tab-panel { display: none; padding: 24px 0; }

/* Show active panel via sibling selectors */
#tab-readme:checked ~ #panel-readme,
#tab-sigils:checked ~ #panel-sigils,
#tab-siglets:checked ~ #panel-siglets,
#tab-signets:checked ~ #panel-signets,
#tab-datatypes:checked ~ #panel-datatypes,
#tab-classes:checked ~ #panel-classes,
#tab-typesyns:checked ~ #panel-typesyns,
#tab-foreign:checked ~ #panel-foreign {
  display: block;
}

/* ── Readme tab ── */

#panel-readme h2 { font-size: 18px; margin-bottom: 12px; }
#panel-readme h3 { font-size: 15px; margin: 16px 0 8px; }
#panel-readme p { margin-bottom: 12px; max-width: 640px; }
#panel-readme pre {
  background: #f5f5f0;
  border: 1px solid #e8e6e0;
  border-radius: 4px;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  overflow-x: auto;
  max-width: 640px;
}
.mapping-list { margin: 8px 0 16px 20px; }
.mapping-list dt { font-weight: 600; float: left; width: 100px; clear: left; }
.mapping-list dd { margin-left: 110px; margin-bottom: 4px; }

/* ── Signature table ── */

.sig-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.sig-table th {
  text-align: left;
  padding: 8px 12px;
  border-bottom: 2px solid #d0ccc4;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #888;
}
.sig-row { border-bottom: 1px solid #f0f0f0; }
.sig-row-error { background: #fff5f5; }
.sig-idx {
  width: 40px;
  text-align: right;
  padding: 8px 12px;
  color: #aaa;
  font-variant-numeric: tabular-nums;
}
.sig-meta {
  width: 280px;
  padding: 8px 12px;
  vertical-align: top;
}
.sig-meta-name { font-weight: 700; color: #333; }
.sig-meta-cat {
  font-size: 11px;
  color: #999;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}
.sig-meta-raw {
  font-family: var(--font-mono);
  font-size: 11px;
  color: #888;
  margin-top: 4px;
  word-break: break-all;
}
.sig-render-cell {
  padding: 8px 12px;
  vertical-align: middle;
}