/* ============================================
   WWW — Shared Styles
   ============================================ */

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

:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #666;
  --border: #ccc;
  --mono: ui-monospace, "SF Mono", Menlo, Monaco, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0d0d;
    --fg: #e5e5e5;
    --muted: #888;
    --border: #333;
  }
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
}

/* ============================================
   Navigation
   ============================================ */

.www-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 2rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
}

.www-nav a {
  color: inherit;
  text-decoration: none;
}

.www-nav .prev::before {
  content: "← ";
  opacity: 0.5;
}

.www-nav .next::after {
  content: " →";
  opacity: 0.5;
}

.www-nav .current {
  font-weight: 600;
}

.www-nav .current a {
  opacity: 0.7;
}

.www-nav .current a:hover {
  opacity: 1;
}

/* ============================================
   Single Column Page Layout
   ============================================ */

.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem;
}

.page-header {
  margin-bottom: 3rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.page-header h1 {
  margin: 0 0 0.5rem 0;
  font-size: 2rem;
  font-weight: 600;
}

.page-header p {
  margin: 0;
  color: var(--muted);
}

.section {
  margin-bottom: 3rem;
}

.section h2 {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem;
  margin: 0 0 1.5rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
  font-size: 1.25rem;
}

/* ============================================
   Light/Dark Split Layout (html-css only)
   ============================================ */

.expose-header {
  display: flex;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
}

.expose-header > div {
  flex: 1;
  padding: 0.75rem 2rem;
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.header-light {
  background: #fff;
  color: #333;
}

.header-dark {
  background: #0d0d0d;
  color: #e5e5e5;
}

.expose {
  width: 100%;
}

.row {
  display: flex;
  border-bottom: 1px solid var(--border);
}

.cell {
  flex: 1;
  padding: 2rem;
  min-width: 0;
}

.cell.light {
  background: #ffffff;
  color: #1a1a1a;
  color-scheme: light;
}

.cell.dark {
  background: #0d0d0d;
  color: #e5e5e5;
  color-scheme: dark;
}

.section-title {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid currentColor;
  opacity: 0.8;
}

.section-title h2 {
  margin: 0;
  font-size: 1.25rem;
}

.element-group {
  margin-bottom: 1.5rem;
  padding: 1rem;
  border: 1px dashed currentColor;
  border-radius: 4px;
  opacity: 0.4;
}

.element-group:hover {
  opacity: 1;
}

.group-label {
  font-family: var(--mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.6;
  margin-bottom: 0.75rem;
  display: block;
}

/* ============================================
   Spec Labels
   ============================================ */

.spec-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  opacity: 0.5;
  padding: 0.15rem 0.4rem;
  border: 1px solid currentColor;
  border-radius: 3px;
  white-space: nowrap;
  font-weight: normal;
}

/* ============================================
   Diagrams (SVG)
   ============================================ */

.diagram {
  margin: 1.5rem 0;
  overflow-x: auto;
}

.diagram svg {
  display: block;
  max-width: 100%;
  height: auto;
}

.diagram text {
  font-family: var(--mono);
  font-size: 11px;
  fill: currentColor;
  dominant-baseline: middle;
}

.diagram .label {
  font-size: 8px;
  opacity: 0.5;
  text-transform: uppercase;
}

.diagram rect,
.diagram line,
.diagram path {
  stroke: currentColor;
  fill: none;
}

.diagram .filled {
  fill: currentColor;
  opacity: 0.08;
}

/* ============================================
   Tables
   ============================================ */

.defaults-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  margin: 1rem 0;
}

.defaults-table th,
.defaults-table td {
  padding: 0.5rem 0.75rem;
  text-align: left;
  vertical-align: middle;
  border-bottom: 1px solid var(--border);
}

.defaults-table th {
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}

.defaults-table code {
  font-family: var(--mono);
  font-size: 0.8rem;
}

/* ============================================
   Bytes / Raw Text
   ============================================ */

.bytes {
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.6;
  padding: 1rem;
  background: currentColor;
  background: color-mix(in srgb, currentColor 5%, transparent);
  border-radius: 4px;
  overflow-x: auto;
  margin: 1rem 0;
}

/* ============================================
   File Tree
   ============================================ */

.file-tree {
  font-family: var(--mono);
  font-size: 0.875rem;
  line-height: 2;
  margin: 0;
}

.file-tree a {
  color: inherit;
  text-decoration: none;
  opacity: 0.7;
}

.file-tree a:hover {
  opacity: 1;
  text-decoration: underline;
}