/* ===== BRG Instanced Renderer - Custom Theme ===== */

/* --- Color Variables --- */
:root {
  --brand-primary: #8ab4f8;
  --brand-primary-hover: #aecbfa;
  --brand-secondary: #22c55e;
  --brand-accent: #a78bfa;
  --brand-bg-dark: #1e1e1e;
  --brand-bg-sidebar: #191919;
  --brand-bg-card: #282828;
  --brand-bg-card-hover: #303030;
  --brand-border: #2e2e2e;
  --brand-text: #e2e8f0;
  --brand-text-muted: #94a3b8;
}

/* --- Dark theme overrides --- */
[data-bs-theme="dark"] {
  --bs-body-bg: var(--brand-bg-dark);
  --bs-body-color: var(--brand-text);
}

/* Article area is the default body bg (lighter) */

[data-bs-theme="dark"] .navbar {
  background: linear-gradient(135deg, #1a1a1a 0%, #1e1e1e 100%) !important;
  border-bottom: 1px solid var(--brand-border);
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.4);
}

.navbar-brand img#logo {
  height: 32px;
  width: auto;
  margin-right: 0.5em;
}

.navbar-nav .nav-link {
  margin: 0 0.25em !important;
}

/* --- Sidebar polish --- */
[data-bs-theme="dark"] .toc-offcanvas {
  padding-left: 1.75em;
}

[data-bs-theme="dark"] .sidebar {
  background: var(--brand-bg-dark);
  border-right: 1px solid var(--brand-border);
}

[data-bs-theme="dark"] #toc {
  background: var(--brand-bg-sidebar);
  border: none;
  border-radius: 10px;
  padding: 0.75em 0.5em;
  margin: 1em 0.5em;
  max-height: calc(100vh - 160px);
  overflow-y: auto;
}

#toc ul,
.toc ul {
  font-size: 0.95rem !important;
}

#toc .nav > li,
.toc li {
  margin-bottom: 0.25em !important;
  padding-top: 0.15em !important;
  padding-bottom: 0.15em !important;
  padding-left: 0.85rem !important;
}

#toc .nav > li > a,
.toc a {
  color: var(--brand-text-muted);
  font-size: 0.95rem !important;
  margin-left: 0.3em !important;
  transition: color 0.2s, padding-left 0.2s;
}

[data-bs-theme="dark"] .toc .nav > li > a:hover {
  color: var(--brand-primary);
}

/* Active item — only highlight the deepest active (no active child) */
.toc li.active:not(:has(li.active)) > a,
#toc li.active:not(:has(li.active)) > a {
  color: var(--brand-primary) !important;
  font-weight: 600 !important;
  background: rgba(138, 180, 248, 0.1) !important;
  border-radius: 6px !important;
  padding: 0.25em 0.5em !important;
  display: inline-block;
}

/* Parent with active child — no highlight */
.toc li.active:has(li.active) > a,
#toc li.active:has(li.active) > a {
  color: inherit !important;
  font-weight: inherit !important;
  background: none !important;
}

/* --- Article content --- */
article {
  font-size: 1rem;
  line-height: 1.7;
}

article h1 {
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5em;
}

article h2 {
  font-weight: 600;
  color: var(--brand-primary);
  margin-top: 2em;
  padding-bottom: 0.3em;
  border-bottom: 1px solid var(--brand-border);
}

article h3 {
  font-weight: 600;
  color: var(--brand-primary);
  margin-top: 1.5em;
}

article h4 {
  font-weight: 600;
  color: var(--brand-primary);
  margin-top: 1.75em;
}

/* Hide anchor link on heading hover */
.anchorjs-link {
  display: none !important;
}

/* --- Tables --- */
[data-bs-theme="dark"] table {
  border-collapse: separate;
  border-spacing: 0;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--brand-border);
}

[data-bs-theme="dark"] th {
  background: var(--brand-bg-card) !important;
  color: var(--brand-primary);
  font-weight: 600;
  padding: 12px 16px;
  border-bottom: 2px solid var(--brand-border);
}

[data-bs-theme="dark"] td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--brand-border);
}

[data-bs-theme="dark"] tr:last-child td {
  border-bottom: none;
}

[data-bs-theme="dark"] tbody tr:hover {
  background: var(--brand-bg-card-hover);
}

/* --- Code blocks --- */
[data-bs-theme="dark"] pre {
  background: #1a1a1a !important;
  border: 1px solid var(--brand-border);
  border-radius: 8px;
  padding: 1em;
}

[data-bs-theme="dark"] code {
  color: var(--brand-accent);
}

[data-bs-theme="dark"] pre code {
  color: var(--brand-text);
}

/* --- Inline code --- */
[data-bs-theme="dark"] p code,
[data-bs-theme="dark"] li code,
[data-bs-theme="dark"] td code {
  background: var(--brand-bg-card);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

/* --- Links --- */
[data-bs-theme="dark"] article a {
  color: var(--brand-primary);
  text-decoration: none;
  transition: color 0.2s;
}

[data-bs-theme="dark"] article a:hover {
  color: var(--brand-primary-hover);
  text-decoration: underline;
}

/* --- Blockquotes / Notes --- */
[data-bs-theme="dark"] blockquote {
  border-left: 4px solid var(--brand-primary);
  background: var(--brand-bg-card);
  padding: 1em 1.5em;
  border-radius: 0 8px 8px 0;
  margin: 1.5em 0;
}

/* --- Footer (hidden) --- */
footer {
  display: none !important;
}

/* --- Copyright in sidebar --- */
#toc::after {
  content: "\00a9  2026 Milk_Drinker01";
  display: block;
  text-align: center;
  font-size: 0.75rem;
  color: var(--brand-text-muted);
  opacity: 0.5;
  padding: 0.5em 0.5em 0.5em;
  margin-top: auto;
}

/* --- Scrollbar --- */
[data-bs-theme="dark"] ::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

[data-bs-theme="dark"] ::-webkit-scrollbar-track {
  background: var(--brand-bg-dark);
}

[data-bs-theme="dark"] ::-webkit-scrollbar-thumb {
  background: var(--brand-border);
  border-radius: 4px;
}

[data-bs-theme="dark"] ::-webkit-scrollbar-thumb:hover {
  background: #3a3d4e;
}

/* --- Horizontal Rules --- */
[data-bs-theme="dark"] hr {
  border-color: var(--brand-border);
  opacity: 0.5;
}

/* ===== LANDING PAGE / HERO ===== */

.hero-section {
  text-align: center;
  padding: 4em 2em 3em;
  background: linear-gradient(180deg, #222222 0%, var(--brand-bg-dark) 100%);
  border-radius: 12px;
  margin-bottom: 3em;
}

.hero-section h1 {
  font-size: 2.8em;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.3em;
  border-bottom: none;
}

.hero-section .tagline {
  font-size: 1.25em;
  color: var(--brand-text-muted);
  max-width: 700px;
  margin: 0 auto 2em;
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  gap: 1em;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 1.5em;
}

.hero-buttons a {
  display: inline-block;
  padding: 0.75em 2em;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1em;
  text-decoration: none !important;
  transition: transform 0.2s, box-shadow 0.2s;
}

.hero-buttons a:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(138, 180, 248, 0.3);
  text-decoration: none !important;
}

.hero-buttons .btn-primary-custom {
  background: var(--brand-primary);
  color: #fff !important;
}

.hero-buttons .btn-secondary-custom {
  background: var(--brand-bg-card);
  color: var(--brand-text) !important;
  border: 1px solid var(--brand-border);
}

/* --- Feature Cards Grid --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5em;
  margin: 2em 0;
}

.feature-card {
  background: var(--brand-bg-card);
  border: 1px solid var(--brand-border);
  border-radius: 12px;
  padding: 1.5em;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  transform: translateY(-3px);
  border-color: var(--brand-primary);
  box-shadow: 0 8px 30px rgba(138, 180, 248, 0.1);
}

.feature-card .card-icon {
  font-size: 2em;
  margin-bottom: 0.5em;
}

.feature-card h3 {
  font-size: 1.15em;
  font-weight: 600;
  color: var(--brand-text) !important;
  margin: 0.5em 0;
  border-bottom: none;
  padding-bottom: 0;
}

.feature-card p {
  color: var(--brand-text-muted);
  font-size: 0.95em;
  line-height: 1.5;
  margin: 0;
}

.feature-card a {
  color: var(--brand-primary);
  text-decoration: none;
  font-weight: 500;
}

.feature-card a:hover {
  text-decoration: underline;
}

/* --- Compatibility Badge Row --- */
.badge-row {
  display: flex;
  gap: 0.75em;
  flex-wrap: wrap;
  justify-content: center;
  margin: 2em 0;
}

.badge-item {
  background: var(--brand-bg-card);
  border: 1px solid var(--brand-border);
  border-radius: 20px;
  padding: 0.5em 1.25em;
  font-size: 0.9em;
  color: var(--brand-text-muted);
  font-weight: 500;
}

/* --- Section Headers on Landing --- */
.section-header {
  text-align: center;
  margin: 3em 0 1.5em;
}

.section-header h2 {
  font-size: 1.8em;
  font-weight: 700;
  border-bottom: none;
  color: var(--brand-text);
}

.section-header p {
  color: var(--brand-text-muted);
  font-size: 1.05em;
}

/* ===== LIGHT THEME ===== */

[data-bs-theme="light"] .hero-section {
  background: linear-gradient(180deg, #f0f4ff 0%, #fff 100%);
}

[data-bs-theme="light"] .hero-section h1 {
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

[data-bs-theme="light"] .feature-card {
  background: #fff;
  border-color: #e2e8f0;
}

[data-bs-theme="light"] .feature-card:hover {
  border-color: #2563eb;
  box-shadow: 0 8px 30px rgba(37, 99, 235, 0.08);
}

[data-bs-theme="light"] .badge-item {
  background: #f8fafc;
  border-color: #e2e8f0;
  color: #475569;
}