/* ============================================================
   Themed Entertainment & Attraction Design Explained
   Grid Portal — Analytical Editorial — Bootstrap 5
   ============================================================ */

/* ---- Custom Properties ---- */
:root {
  --color-primary:     #1a3a5c;
  --color-accent:      #c0820a;
  --color-accent-lt:   #e09c28;
  --color-bg:          #f4f6f8;
  --color-surface:     #ffffff;
  --color-border:      #dde3ea;
  --color-text:        #1e2a35;
  --color-muted:       #5a6a7a;
  --color-tag-bg:      #e8eef5;
  --color-tag-text:    #1a3a5c;
  --font-heading:      'Inter', system-ui, -apple-system, sans-serif;
  --font-body:         'Inter', system-ui, -apple-system, sans-serif;
  --radius-card:       6px;
  --shadow-card:       0 2px 8px rgba(26,58,92,0.08);
  --shadow-hover:      0 6px 20px rgba(26,58,92,0.14);
  --transition:        0.2s ease;
}

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

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-primary);
}

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

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

/* ---- Layout ---- */
.site-container { max-width: 1260px; margin: 0 auto; padding: 0 1.25rem; }

/* ---- Site Header ---- */
.site-header {
  background-color: var(--color-primary);
  border-bottom: 3px solid var(--color-accent);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .navbar-brand {
  font-weight: 800;
  font-size: 1.1rem;
  color: #fff !important;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.site-header .navbar-brand small {
  font-size: 0.72rem;
  font-weight: 400;
  color: rgba(255,255,255,0.65);
  display: block;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.site-header .nav-link {
  color: rgba(255,255,255,0.85) !important;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.5rem 0.9rem !important;
  transition: color var(--transition);
}
.site-header .nav-link:hover,
.site-header .nav-link.active { color: var(--color-accent-lt) !important; }

.site-header .navbar-toggler {
  border-color: rgba(255,255,255,0.4);
}
.site-header .navbar-toggler-icon {
  filter: brightness(0) invert(1);
}

/* ---- Site Footer ---- */
.site-footer {
  background-color: var(--color-primary);
  color: rgba(255,255,255,0.75);
  padding: 3rem 0 2rem;
  margin-top: 4rem;
  font-size: 0.85rem;
}
.site-footer h6 {
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.85rem;
}
.site-footer a {
  color: rgba(255,255,255,0.65);
  font-size: 0.82rem;
  display: block;
  margin-bottom: 0.4rem;
}
.site-footer a:hover { color: var(--color-accent-lt); }
.site-footer .footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.15);
  margin-top: 2rem;
  padding-top: 1.25rem;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.45);
}

/* ---- Page Hero ---- */
.page-hero {
  background-color: var(--color-primary);
  color: #fff;
  padding: 3.5rem 0 3rem;
  position: relative;
  overflow: hidden;
}
.page-hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-lt));
}
.page-hero .hero-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent-lt);
  margin-bottom: 0.6rem;
}
.page-hero h1 {
  color: #fff;
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 0.75rem;
}
.page-hero p.lead {
  color: rgba(255,255,255,0.78);
  font-size: 1.05rem;
  max-width: 640px;
  line-height: 1.6;
  margin-bottom: 0;
}

/* ---- Hero with Cover Image ---- */
.hero-with-cover {
  position: relative;
  min-height: 420px;
  display: flex;
  align-items: flex-end;
}
.hero-with-cover .hero-cover {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.35);
}
.hero-with-cover .hero-content {
  position: relative;
  z-index: 2;
  padding: 3rem 0 2.5rem;
  width: 100%;
}

/* ---- Breadcrumb ---- */
.breadcrumb-nav {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}
.breadcrumb-nav .breadcrumb {
  margin-bottom: 0;
  font-size: 0.82rem;
}
.breadcrumb-nav .breadcrumb-item a { color: var(--color-primary); }
.breadcrumb-nav .breadcrumb-item.active { color: var(--color-muted); }

/* ---- Concept Cards (Grid Portal) ---- */
.concept-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.concept-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-accent);
}
.concept-card .card-img-wrap {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--color-primary);
}
.concept-card .card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.concept-card:hover .card-img-wrap img {
  transform: scale(1.04);
}
.concept-card .card-body {
  padding: 1.25rem 1.35rem 0.85rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.concept-card .card-category {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 0.45rem;
}
.concept-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
  line-height: 1.3;
}
.concept-card p {
  font-size: 0.87rem;
  color: var(--color-muted);
  line-height: 1.55;
  flex: 1;
  margin-bottom: 1rem;
}
.concept-card .card-footer-link {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.7rem 1.35rem;
  border-top: 1px solid var(--color-border);
  background: transparent;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: color var(--transition), background var(--transition);
}
.concept-card .card-footer-link:hover {
  background: var(--color-tag-bg);
  color: var(--color-accent);
}

/* ---- Filter Bar ---- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
  align-items: center;
}
.filter-bar .filter-label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
  margin-right: 0.25rem;
}
.filter-btn {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.35rem 0.9rem;
  border: 1.5px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-surface);
  color: var(--color-muted);
  cursor: pointer;
  transition: all var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.filter-btn:hover,
.filter-btn.active {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: #fff;
}

/* ---- Stat Chips (Index) ---- */
.stat-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}
.stat-chip {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 0.85rem 1.25rem;
  min-width: 130px;
  box-shadow: var(--shadow-card);
}
.stat-chip .stat-number {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 0.2rem;
}
.stat-chip .stat-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
}

/* ---- Tag Pills ---- */
.tag-pill {
  display: inline-block;
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.25rem 0.7rem;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0.15rem 0.1rem;
}

/* ---- Article Content ---- */
.article-body {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 2.5rem 2.75rem;
  margin-bottom: 2rem;
}
@media (max-width: 576px) {
  .article-body { padding: 1.5rem 1.25rem; }
}

.article-body h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--color-border);
}
.article-body h2:first-child { margin-top: 0; }

.article-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.article-body p {
  margin-bottom: 1.1rem;
  font-size: 0.97rem;
  color: var(--color-text);
  line-height: 1.72;
}

.article-body ul, .article-body ol {
  padding-left: 1.4rem;
  margin-bottom: 1.1rem;
}
.article-body li {
  font-size: 0.97rem;
  line-height: 1.65;
  margin-bottom: 0.35rem;
  color: var(--color-text);
}

/* ---- Callout Block ---- */
.callout-block {
  background: var(--color-tag-bg);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 4px 4px 0;
  padding: 1.1rem 1.35rem;
  margin: 1.5rem 0;
  font-size: 0.93rem;
  color: var(--color-text);
  line-height: 1.6;
}
.callout-block strong {
  color: var(--color-primary);
}

/* ---- Inline Figure ---- */
.article-figure {
  margin: 2rem 0;
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--color-border);
}
.article-figure img {
  width: 100%;
  display: block;
}
.article-figure figcaption {
  padding: 0.65rem 1rem;
  font-size: 0.78rem;
  color: var(--color-muted);
  background: var(--color-tag-bg);
  border-top: 1px solid var(--color-border);
}

/* ---- Collapsible Sections ---- */
.collapse-section {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  margin-bottom: 0.75rem;
}
.collapse-section .collapse-header {
  width: 100%;
  text-align: left;
  padding: 0.9rem 1.25rem;
  background: var(--color-surface);
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background var(--transition);
}
.collapse-section .collapse-header:hover { background: var(--color-tag-bg); }
.collapse-section .collapse-header .arrow {
  transition: transform 0.2s;
  color: var(--color-accent);
  font-size: 0.85rem;
}
.collapse-section .collapse-header[aria-expanded="true"] .arrow {
  transform: rotate(180deg);
}
.collapse-section .collapse-body {
  padding: 1rem 1.25rem;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  font-size: 0.93rem;
  line-height: 1.65;
  color: var(--color-text);
}

/* ---- Related Content Block ---- */
.related-content {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 1.75rem 2rem;
}
.related-content h4 {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-muted);
  margin-bottom: 1.1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--color-border);
}
.related-item {
  display: flex;
  gap: 0.9rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border);
  align-items: flex-start;
  transition: background var(--transition);
}
.related-item:last-child { border-bottom: none; }
.related-item .ri-category {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 0.2rem;
}
.related-item .ri-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.3;
}
.related-item:hover .ri-title { color: var(--color-accent); }
.related-item .ri-icon {
  width: 36px;
  height: 36px;
  border-radius: 4px;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.8rem;
  flex-shrink: 0;
  font-weight: 700;
}

/* ---- TOC Sidebar ---- */
.toc-sidebar {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 1.25rem;
  position: sticky;
  top: 80px;
}
.toc-sidebar h5 {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-muted);
  margin-bottom: 0.85rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}
.toc-sidebar ol {
  padding-left: 1.1rem;
  margin-bottom: 0;
}
.toc-sidebar li {
  font-size: 0.82rem;
  margin-bottom: 0.45rem;
  line-height: 1.4;
}
.toc-sidebar a { color: var(--color-primary); }
.toc-sidebar a:hover { color: var(--color-accent); }

/* ---- Section Banner ---- */
.section-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, #0d2540 100%);
  color: #fff;
  border-radius: var(--radius-card);
  padding: 2.5rem;
  margin-bottom: 2.5rem;
  position: relative;
  overflow: hidden;
}
.section-banner::before {
  content: '';
  position: absolute;
  right: -40px;
  top: -40px;
  width: 200px;
  height: 200px;
  background: rgba(192,130,10,0.15);
  border-radius: 50%;
}
.section-banner h2 {
  color: #fff;
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}
.section-banner p {
  color: rgba(255,255,255,0.78);
  margin-bottom: 0;
  font-size: 0.93rem;
}

/* ---- Category Grid Icon Cards ---- */
.icon-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 1.5rem 1.35rem;
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  cursor: pointer;
  height: 100%;
  text-decoration: none;
  color: inherit;
  display: block;
}
.icon-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-accent);
}
.icon-card .ic-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-size: 1.35rem;
  color: #fff;
}
.icon-card h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.4rem;
}
.icon-card p {
  font-size: 0.82rem;
  color: var(--color-muted);
  line-height: 1.5;
  margin-bottom: 0;
}

/* ---- Definition Table ---- */
.def-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin: 1.25rem 0;
}
.def-table th {
  background: var(--color-primary);
  color: #fff;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 0.65rem 1rem;
  text-align: left;
  font-weight: 700;
}
.def-table td {
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  line-height: 1.55;
  vertical-align: top;
}
.def-table tr:nth-child(even) td {
  background: var(--color-tag-bg);
}

/* ---- Utility ---- */
.text-accent { color: var(--color-accent) !important; }
.text-primary-brand { color: var(--color-primary) !important; }
.section-divider {
  height: 1px;
  background: var(--color-border);
  margin: 2.5rem 0;
}
.category-bar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0.6rem 0;
}
.category-bar a {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-muted);
  margin-right: 1.5rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid transparent;
  transition: all var(--transition);
}
.category-bar a:hover,
.category-bar a.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-accent);
}

/* ---- Smooth scroll ---- */
html { scroll-behavior: smooth; }

/* ---- Mobile adjustments ---- */
@media (max-width: 768px) {
  .page-hero { padding: 2.5rem 0 2rem; }
  .site-footer { padding: 2rem 0 1.5rem; }
  .article-body h2 { font-size: 1.15rem; }
  .stat-chips { gap: 0.6rem; }
  .stat-chip { min-width: 100px; padding: 0.65rem 1rem; }
  .related-content { padding: 1.25rem; }
  .section-banner { padding: 1.75rem; }
  .def-table { display: block; overflow-x: auto; }
}

@media (max-width: 480px) {
  .filter-bar { gap: 0.35rem; }
  .filter-btn { font-size: 0.72rem; padding: 0.3rem 0.7rem; }
  .concept-card h3 { font-size: 0.97rem; }
}