/* ==========================================================================
   agibel.de – Sachliches Editorial- & Fachportal-Design
   Stil: Seriöses Technik- & Architektur-Magazin (klar, typografisch, präzise)
   ========================================================================== */

:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f4f6f8;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --bg-elevated: #edf0f4;
  --text-primary: #111827;
  --text-secondary: #374151;
  --text-muted: #6b7280;
  --accent-primary: #0f4c81;
  --accent-secondary: #1e3a8a;
  --accent-emerald: #15803d;
  --accent-amber: #b45309;
  --accent-rose: #b91c1c;
  --amazon-btn-bg: #1f2937;
  --amazon-btn-hover: #111827;
  --border-color: #d1d5db;
  --border-subtle: #e5e7eb;
  --border-highlight: #0f4c81;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --radius-sm: 3px;
  --radius-md: 4px;
  --radius-lg: 6px;
  --max-width: 1200px;
  --article-width: 820px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}

[data-theme="dark"] {
  --bg-primary: #0f141c;
  --bg-secondary: #161d27;
  --bg-card: #161d27;
  --bg-card-hover: #1c2532;
  --bg-elevated: #222d3d;
  --text-primary: #f3f4f6;
  --text-secondary: #d1d5db;
  --text-muted: #9ca3af;
  --accent-primary: #60a5fa;
  --accent-secondary: #93c5fd;
  --accent-emerald: #34d399;
  --accent-amber: #fbbf24;
  --accent-rose: #f87171;
  --amazon-btn-bg: #374151;
  --amazon-btn-hover: #4b5563;
  --border-color: #2d3748;
  --border-subtle: #1f2937;
  --border-highlight: #60a5fa;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ==========================================================================
   Layout & Grid
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.article-container {
  width: 100%;
  max-width: var(--article-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 290px;
  gap: 3rem;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  align-items: start;
}

@media (max-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   Top Disclosure & Header
   ========================================================================== */

.top-disclosure {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.78rem;
  color: var(--text-muted);
  padding: 0.4rem 0;
  text-align: left;
}

.top-disclosure a {
  color: var(--text-secondary);
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 1.5rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--text-primary);
  text-decoration: none !important;
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  background: var(--accent-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 0.85rem;
  font-weight: 700;
  font-family: var(--font-mono);
  letter-spacing: 0;
}

.brand-claim {
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  display: block;
  line-height: 1;
  margin-top: 3px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.nav-link {
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  text-decoration: none !important;
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-secondary);
}

.nav-link.active {
  color: var(--accent-primary);
  font-weight: 600;
  border-bottom-color: var(--accent-primary);
  border-radius: 0;
}

.level-dot {
  display: none;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.theme-toggle {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 600;
  font-family: var(--font-sans);
}

.theme-toggle:hover {
  color: var(--text-primary);
  border-color: var(--text-muted);
}

@media (max-width: 900px) {
  .header-inner {
    height: auto;
    padding: 0.75rem 0;
    flex-wrap: wrap;
  }
  .main-nav {
    width: 100%;
    order: 3;
    overflow-x: auto;
    padding-bottom: 0.25rem;
    flex-wrap: nowrap;
  }
  .nav-link {
    white-space: nowrap;
    font-size: 0.84rem;
  }
}

/* ==========================================================================
   Hero & Section Headers (Editorial Style)
   ========================================================================== */

.hero {
  padding: 3.5rem 0 3rem;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.badge {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  font-size: 0.72rem;
  font-weight: 700;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.9rem;
  background: var(--bg-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.badge-l1, .badge-l2, .badge-l3, .badge-l4 {
  background: var(--bg-elevated);
  color: var(--accent-primary);
  border: 1px solid var(--border-color);
}

.hero h1 {
  font-size: clamp(1.9rem, 3.6vw, 2.75rem);
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 1rem;
  max-width: 860px;
  color: var(--text-primary);
}

.gradient-text {
  color: var(--accent-primary);
  background: none;
  -webkit-text-fill-color: currentColor;
}

.hero-lead {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 760px;
  margin-bottom: 1.75rem;
  line-height: 1.65;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  text-decoration: none !important;
  border: 1px solid transparent;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
  background: var(--accent-primary);
  color: #ffffff !important;
  border-color: var(--accent-primary);
}

[data-theme="dark"] .btn-primary {
  background: #2563eb;
  border-color: #2563eb;
}

.btn-primary:hover {
  background: var(--accent-secondary);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary) !important;
  border-color: var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--text-primary);
  background: var(--bg-elevated);
}

.btn-amazon {
  background: var(--amazon-btn-bg);
  color: #ffffff !important;
  font-weight: 600;
  font-size: 0.85rem;
  padding: 0.55rem 1rem;
  border: 1px solid var(--amazon-btn-bg);
}

.btn-amazon:hover {
  background: var(--amazon-btn-hover);
}

/* ==========================================================================
   Sections & Cards
   ========================================================================== */

.section {
  padding: 3.5rem 0;
}

.section-alt {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-subtle);
}

.section-header h2 {
  font-size: clamp(1.45rem, 2.5vw, 1.9rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.45rem;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 740px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 1.25rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 1.25rem;
}

@media (max-width: 600px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}

.level-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.level-card:hover {
  border-color: var(--accent-primary);
}

.level-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.55rem;
  font-weight: 700;
  color: var(--text-primary);
}

.level-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-bottom: 1.15rem;
}

.feature-list {
  list-style: none;
  margin-bottom: 1.35rem;
  border-top: 1px solid var(--border-subtle);
  padding-top: 0.85rem;
}

.feature-list li {
  font-size: 0.86rem;
  color: var(--text-secondary);
  padding: 0.3rem 0;
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.feature-list li::before {
  content: "–";
  color: var(--accent-primary);
  font-weight: 700;
  flex-shrink: 0;
}

/* ==========================================================================
   Editorial Content, GEO Box & Tables
   ========================================================================== */

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  list-style: none;
  font-family: var(--font-mono);
}

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 0.45rem;
  color: var(--text-muted);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 1rem;
  padding: 0.75rem 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
}

.geo-tldr-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--accent-primary);
  border-radius: var(--radius-md);
  padding: 1.35rem 1.5rem;
  margin: 1.75rem 0;
}

.geo-tldr-header {
  font-weight: 700;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-primary);
  margin-bottom: 0.5rem;
}

.geo-tldr-box p {
  font-size: 0.98rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.geo-key-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 0.75rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
}

.fact-item {
  background: var(--bg-secondary);
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.fact-label {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  text-transform: uppercase;
  display: block;
  margin-bottom: 0.15rem;
}

.fact-value {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
}

.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 2.5rem 0 0.85rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--border-color);
  letter-spacing: -0.015em;
  color: var(--text-primary);
}

.article-content h3 {
  font-size: 1.18rem;
  font-weight: 700;
  margin: 1.75rem 0 0.6rem;
  color: var(--text-primary);
}

.article-content p {
  margin-bottom: 1.15rem;
  color: var(--text-secondary);
  font-size: 1rem;
}

.article-content ul, .article-content ol {
  margin: 0 0 1.35rem 1.35rem;
  color: var(--text-secondary);
}

.article-content li {
  margin-bottom: 0.45rem;
}

.article-content strong {
  color: var(--text-primary);
  font-weight: 600;
}

.callout {
  border-radius: var(--radius-md);
  padding: 1.15rem 1.35rem;
  margin: 1.5rem 0;
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--accent-primary);
  background: var(--bg-secondary);
}

.callout-tip { border-left-color: var(--accent-emerald); }
.callout-warn { border-left-color: var(--accent-amber); }
.callout-danger { border-left-color: var(--accent-rose); }

.callout-title {
  font-weight: 700;
  font-size: 0.92rem;
  margin-bottom: 0.35rem;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-family: var(--font-mono);
}

.table-wrapper {
  overflow-x: auto;
  margin: 1.5rem 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.comparison-table th {
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-weight: 700;
  padding: 0.8rem 1rem;
  border-bottom: 2px solid var(--border-color);
  white-space: nowrap;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.comparison-table td {
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  vertical-align: top;
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.comparison-table tr:hover td {
  background: var(--bg-card-hover);
}

/* Code Blocks */
.code-block {
  background: #111827;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin: 1.5rem 0;
  overflow: hidden;
}

.code-header {
  background: #1f2937;
  padding: 0.5rem 1rem;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: #9ca3af;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #374151;
}

.copy-btn {
  background: #374151;
  border: 1px solid #4b5563;
  color: #f9fafb;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.74rem;
  font-family: var(--font-mono);
  cursor: pointer;
}

.copy-btn:hover {
  background: #4b5563;
}

.code-block pre {
  padding: 1rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: #e5e7eb;
  line-height: 1.55;
}

/* ==========================================================================
   Product Lists & Affiliate Specification Rows
   ========================================================================== */

.shopping-bundle {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-top: 3px solid var(--accent-primary);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin: 2.25rem 0;
}

.bundle-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-subtle);
}

.bundle-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0 !important;
  border: none !important;
  padding: 0 !important;
}

.bundle-subtitle {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

.product-item {
  display: grid;
  grid-template-columns: 48px 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  margin-bottom: 0.65rem;
}

.product-item:hover {
  border-color: var(--border-color);
}

.product-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--accent-primary);
}

.product-info h4 {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.product-info p {
  font-size: 0.86rem;
  color: var(--text-secondary);
  margin: 0 !important;
}

.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.4rem;
}

.product-tag {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 0.1rem 0.45rem;
  border-radius: 2px;
}

.product-action {
  text-align: right;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.35rem;
}

.price-range {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.affiliate-note {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
  text-align: right;
}

@media (max-width: 700px) {
  .product-item {
    grid-template-columns: 1fr;
  }
  .product-icon {
    display: none;
  }
  .product-action {
    align-items: stretch;
    text-align: center;
  }
}

/* ==========================================================================
   Sidebar
   ========================================================================== */

.sidebar-sticky {
  position: sticky;
  top: 84px;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.sidebar-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.2rem;
}

.sidebar-box h3 {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.toc-list {
  list-style: none;
}

.toc-list li {
  margin-bottom: 0.4rem;
}

.toc-list a {
  color: var(--text-secondary);
  font-size: 0.86rem;
  display: block;
  padding: 0.2rem 0 0.2rem 0.65rem;
  border-left: 2px solid var(--border-subtle);
  text-decoration: none;
}

.toc-list a:hover {
  color: var(--accent-primary);
  border-left-color: var(--accent-primary);
}

/* ==========================================================================
   Interactive Modules (Sober Technical UI)
   ========================================================================== */

.interactive-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  margin: 1.5rem 0;
}

.quiz-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.85rem;
  margin: 1.15rem 0;
}

.quiz-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1rem;
  text-align: left;
  color: var(--text-primary);
  cursor: pointer;
  font-family: var(--font-sans);
}

.quiz-btn:hover, .quiz-btn.selected {
  border-color: var(--accent-primary);
  background: var(--bg-card);
  box-shadow: inset 3px 0 0 var(--accent-primary);
}

.quiz-btn strong {
  display: block;
  font-size: 0.94rem;
  margin-bottom: 0.25rem;
}

.quiz-btn span {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.45;
  display: block;
}

.quiz-result {
  margin-top: 1rem;
  padding: 1.25rem;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  border-left: 3px solid var(--accent-primary);
}

/* Sober Technical Dashboard Preview */
.tablet-frame {
  background: #111827;
  border: 6px solid #374151;
  border-radius: 8px;
  padding: 1.25rem;
  margin: 1.75rem 0;
  color: #f3f4f6;
}

.tablet-statusbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: #9ca3af;
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid #1f2937;
}

.ha-dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 0.75rem;
}

.ha-mushroom-card {
  background: #1f2937;
  border: 1px solid #374151;
  border-radius: 6px;
  padding: 0.85rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  user-select: none;
}

.ha-mushroom-card.active-light {
  background: #1e293b;
  border-color: #60a5fa;
}

.ha-mushroom-card.active-climate {
  background: #1e293b;
  border-color: #34d399;
}

.ha-card-icon {
  width: 34px;
  height: 34px;
  border-radius: 4px;
  background: #111827;
  border: 1px solid #374151;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  font-weight: 700;
  color: #9ca3af;
}

.ha-card-title {
  font-weight: 600;
  font-size: 0.86rem;
  display: block;
  color: #f9fafb;
}

.ha-card-state {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: #9ca3af;
}

/* FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin: 1.25rem 0;
}

details.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
}

details.faq-item summary {
  font-weight: 600;
  font-size: 0.98rem;
  cursor: pointer;
  color: var(--text-primary);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

details.faq-item summary::after {
  content: "+";
  font-size: 1.15rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

details.faq-item[open] summary::after {
  content: "−";
}

details.faq-item p {
  margin-top: 0.75rem;
  margin-bottom: 0;
  color: var(--text-secondary);
  font-size: 0.94rem;
}

/* Footer */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 3rem 0 2rem;
  margin-top: 4rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-col h4 {
  color: var(--text-primary);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 0.4rem;
}

.footer-col a {
  color: var(--text-muted);
}

.footer-col a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.78rem;
}

@media (max-width: 850px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 500px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}