/* ── Reset & Base ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:         #111118;
  --surface:    #1a1a24;
  --border:     #2c2c3e;
  --text:       #d8d8e8;
  --muted:      #7070a0;
  --accent:     #5b9cf6;
  --accent-dim: #162040;
  --header-bg:  #0a0a12;
  --header-fg:  #e8e8f0;
  --section-bg: #1a2040;
  --section-fg: #9ab0f0;
  --radius:     4px;
  --shadow:     0 1px 3px rgba(0,0,0,0.4);
  font-size: 16px;
}

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

/* ── Layout ────────────────────────────────────────────── */
.site-header {
  background: var(--header-bg);
  color: var(--header-fg);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}
.site-header a { color: var(--header-fg); text-decoration: none; }
.site-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.site-nav { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.site-nav a {
  font-size: 0.9rem;
  opacity: 0.85;
  transition: opacity 0.15s;
}
.site-nav a:hover { opacity: 1; }

.site-main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 1.25rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--muted);
}

/* ── Typography ────────────────────────────────────────── */
h1 { font-size: 1.75rem; margin-bottom: 0.5rem; }
h2 { font-size: 1.25rem; margin: 1.75rem 0 0.5rem; }
h3 { font-size: 1rem; margin: 1.25rem 0 0.35rem; }
p  { margin-bottom: 0.85rem; }
ul, ol { margin: 0.5rem 0 0.85rem 1.5rem; }
li { margin-bottom: 0.2rem; }
a  { color: var(--accent); }
a:hover { text-decoration: underline; }

strong { font-weight: 600; }
em     { font-style: italic; }
code   {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.875em;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.1em 0.35em;
}

/* ── Intro / disclaimer box ────────────────────────────── */
.disclaimer {
  background: var(--accent-dim);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

/* ── Section header (chip family) ──────────────────────── */
.section-header {
  background: var(--section-bg);
  color: var(--section-fg);
  padding: 0.45rem 0.75rem;
  margin: 2rem 0 0;
  border-radius: var(--radius) var(--radius) 0 0;
  border: 1px solid var(--border);
  border-bottom: none;
  font-weight: 700;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.section-header a { color: var(--section-fg); }

/* ── Data Table ────────────────────────────────────────── */
.buffer-table-wrap {
  overflow-x: auto;
  margin-bottom: 0.25rem;
}
.buffer-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  border: 1px solid var(--border);
  border-top: none;
}
.buffer-table th {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.45rem 0.65rem;
  text-align: left;
  font-weight: 600;
  white-space: nowrap;
  position: sticky;
  top: 0;
}
.buffer-table td {
  border: 1px solid var(--border);
  padding: 0.4rem 0.65rem;
  vertical-align: top;
}
.buffer-table tbody tr:nth-child(even) { background: var(--surface); }
.buffer-table tbody tr:hover { background: var(--accent-dim); }
.buffer-table td.model-cell { white-space: nowrap; font-weight: 500; }
.buffer-table td.notes-cell { font-size: 0.8rem; color: var(--muted); }
.buffer-table td.empty { color: var(--muted); }
.model-link { color: var(--text); text-decoration: none; border-bottom: 1px dashed var(--border); }
.model-link:hover { color: var(--accent); border-bottom-color: var(--accent); }

/* ── Page content (Markdown pages) ────────────────────── */
.page-content {
  max-width: 760px;
}
.page-content h1 { margin-bottom: 1rem; }
.page-content table {
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.9rem;
}
.page-content table th,
.page-content table td {
  border: 1px solid var(--border);
  padding: 0.4rem 0.75rem;
}
.page-content table th { background: var(--surface); font-weight: 600; }
.page-content table tbody tr:nth-child(even) { background: var(--surface); }
.page-content blockquote {
  border-left: 3px solid var(--border);
  padding-left: 1rem;
  margin: 1rem 0;
  color: var(--muted);
}
.page-content pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  overflow-x: auto;
  font-size: 0.85em;
}
.page-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.5rem 0;
}

/* ── Nav dropdown ──────────────────────────────────────── */
.nav-dropdown {
  position: relative;
}
.nav-dropdown > summary {
  list-style: none;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--header-fg);
  opacity: 0.85;
  transition: opacity 0.15s;
}
.nav-dropdown > summary::-webkit-details-marker { display: none; }
.nav-dropdown > summary::marker { display: none; }
.nav-dropdown > summary::after { content: " ▾"; font-size: 0.75em; }
.nav-dropdown[open] > summary::after { content: " ▴"; }
.nav-dropdown > summary:hover { opacity: 1; }
.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  background: var(--header-bg);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  padding: 0.4rem 0;
  white-space: nowrap;
  z-index: 100;
  min-width: 180px;
}
.nav-dropdown-menu a {
  display: block;
  padding: 0.35rem 1rem;
  font-size: 0.875rem;
  color: var(--header-fg);
  opacity: 0.85;
  text-decoration: none;
}
.nav-dropdown-menu a:hover {
  opacity: 1;
  background: rgba(255,255,255,0.07);
  text-decoration: none;
}

/* ── Responsive ────────────────────────────────────────── */
@media (max-width: 600px) {
  .site-header { padding: 0.75rem 1rem; }
  h1 { font-size: 1.4rem; }
  .buffer-table { font-size: 0.8rem; }
  .buffer-table th,
  .buffer-table td { padding: 0.3rem 0.45rem; }
}