/* ============================================================
   Silicon Scripted — Codebase CSS
   Two-pane viewer, sidebar tree, code block styling
   ============================================================ */

/* ── Codebase Hub ─────────────────────────────────────────── */
.codebase-section-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

@media (max-width: 1023px) {
  .codebase-section-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 639px) {
  .codebase-section-grid { grid-template-columns: 1fr; }
}

.codebase-section-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.codebase-section-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
  text-decoration: none;
}

.codebase-section-icon {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--color-accent);
}

.codebase-section-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
}

.codebase-section-desc {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  max-width: none;
  margin: 0;
  flex: 1;
}

.codebase-section-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.875rem;
}

.codebase-entry-count {
  color: var(--color-text-tertiary);
  font-family: var(--font-mono);
}

.codebase-browse-link {
  color: var(--color-blue);
  font-weight: 600;
  text-decoration: none;
}

.codebase-browse-link:hover { text-decoration: underline; }

/* ── Viewer Layout ────────────────────────────────────────── */
.viewer-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: calc(100vh - var(--nav-height));
  align-items: start;
}

/* ── Sidebar ──────────────────────────────────────────────── */
#codebase-sidebar {
  position: sticky;
  top: var(--nav-height);
  height: calc(100vh - var(--nav-height));
  overflow-y: auto;
  border-right: 1px solid var(--color-border);
  background: var(--color-bg);
  padding: 1.25rem 0;
  scrollbar-width: thin;
  scrollbar-color: var(--color-surface-2) transparent;
}

#codebase-sidebar::-webkit-scrollbar { width: 4px; }
#codebase-sidebar::-webkit-scrollbar-track { background: transparent; }
#codebase-sidebar::-webkit-scrollbar-thumb {
  background: var(--color-surface-2);
  border-radius: 4px;
}

.sidebar-section {
  margin-bottom: 0.5rem;
}

.sidebar-section-heading {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  font-family: var(--font-mono);
}

.sidebar-group {
  border: none;
  background: none;
}

.sidebar-group summary {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1.25rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  cursor: pointer;
  user-select: none;
  list-style: none;
  transition: color var(--transition);
}

.sidebar-group summary:hover {
  color: var(--color-text);
}

.sidebar-group summary::before {
  content: '+';
  font-family: var(--font-mono);
  color: var(--color-text-tertiary);
  font-size: 0.75rem;
  width: 12px;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.sidebar-group[open] summary::before {
  content: '−';
}

.sidebar-page-list {
  padding-left: 0;
}

.sidebar-page-link {
  display: block;
  padding: 0.35rem 1.25rem 0.35rem 2.5rem;
  font-size: 0.8375rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--transition), background var(--transition), border-color var(--transition);
  line-height: 1.5;
}

.sidebar-page-link:hover {
  color: var(--color-text);
  background: var(--color-surface);
  text-decoration: none;
}

.sidebar-page-link[aria-current="page"] {
  color: var(--color-accent);
  border-left-color: var(--color-accent);
  background: rgba(50, 215, 75, 0.07);
}

/* Sidebar mobile toggle */
.sidebar-toggle-btn {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  cursor: pointer;
  margin-bottom: 1rem;
}

/* ── Content Pane ─────────────────────────────────────────── */
.viewer-content {
  padding: 2rem var(--content-padding);
  min-width: 0;
}

#codebase-breadcrumb {
  margin-bottom: 1.5rem;
}

#codebase-breadcrumb ol {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.25rem 0.5rem;
  font-size: 0.8125rem;
  color: var(--color-text-tertiary);
  font-family: var(--font-mono);
}

#codebase-breadcrumb li + li::before {
  content: '/';
  margin-right: 0.5rem;
  color: var(--color-text-tertiary);
}

#codebase-breadcrumb li:last-child {
  color: var(--color-text-secondary);
}

/* ── Rendered Markdown ────────────────────────────────────── */
#md-output {
  max-width: 72ch;
  line-height: 1.75;
}

#md-output h1,
#md-output h2,
#md-output h3,
#md-output h4 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

#md-output h1 {
  font-size: 1.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border);
}

#md-output h2 {
  font-size: 1.375rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

#md-output h3 { font-size: 1.125rem; }
#md-output h4 { font-size: 1rem; }

#md-output p {
  margin-bottom: 1rem;
  color: var(--color-text-secondary);
  max-width: 100%;
}

#md-output a {
  color: var(--color-blue);
}

#md-output a:hover { text-decoration: underline; }

#md-output ul,
#md-output ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

#md-output ul { list-style: disc; }
#md-output ol { list-style: decimal; }

#md-output li {
  color: var(--color-text-secondary);
  margin-bottom: 0.375rem;
  font-size: 0.9375rem;
}

#md-output table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.25rem;
  font-size: 0.9rem;
}

#md-output th,
#md-output td {
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--color-border);
  text-align: left;
}

#md-output th {
  background: var(--color-surface);
  color: var(--color-text);
  font-weight: 600;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

#md-output td {
  color: var(--color-text-secondary);
}

#md-output blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: 1rem;
  margin-bottom: 1rem;
  color: var(--color-text-secondary);
  font-style: italic;
}

#md-output hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin-block: 1.5rem;
}

#md-output strong { color: var(--color-text); }

/* ── Code Blocks ──────────────────────────────────────────── */
#md-output pre {
  position: relative;
  background: var(--color-surface) !important;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1rem;
  overflow-x: auto;
  margin-bottom: 1.25rem;
  font-size: 0.875rem;
}

#md-output pre code {
  background: none !important;
  padding: 0;
  font-family: var(--font-mono);
  color: inherit;
  font-size: inherit;
  border-radius: 0;
}

/* Language label */
#md-output pre[class*="language-"]::before,
#md-output pre[data-lang]::before {
  content: attr(data-lang);
  position: absolute;
  top: 0.5rem;
  left: 1rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
}

/* Copy button */
.copy-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.625rem;
  padding: 0.25rem 0.625rem;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  cursor: pointer;
  opacity: 0;
  transition: opacity var(--transition), color var(--transition);
}

#md-output pre:hover .copy-btn {
  opacity: 1;
}

.copy-btn:hover {
  color: var(--color-text);
}

.copy-btn.copied {
  color: var(--color-accent);
  opacity: 1;
}

/* ── Welcome Splash ───────────────────────────────────────── */
.viewer-welcome {
  padding: 3rem 0;
  max-width: 600px;
}

.viewer-welcome h1 {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.viewer-welcome p {
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
  max-width: 100%;
}

.viewer-welcome-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.875rem;
  margin-top: 1.5rem;
}

.viewer-welcome-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1rem;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.viewer-welcome-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
  text-decoration: none;
}

.viewer-welcome-card-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}

.viewer-welcome-card-desc {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  margin: 0;
  max-width: none;
}

/* ── Mobile Viewer ────────────────────────────────────────── */
@media (max-width: 767px) {
  .viewer-layout {
    grid-template-columns: 1fr;
  }

  #codebase-sidebar {
    position: fixed;
    inset: var(--nav-height) 0 0 0;
    height: calc(100vh - var(--nav-height));
    z-index: 80;
    transform: translateX(-100%);
    transition: transform var(--transition);
    border-right: 1px solid var(--color-border);
    background: var(--color-bg);
  }

  .sidebar-open #codebase-sidebar {
    transform: translateX(0);
  }

  .sidebar-toggle-btn {
    display: inline-flex;
  }

  .viewer-welcome-grid {
    grid-template-columns: 1fr;
  }
}