/* ==========================================================================
   Ruang Penglihatan - Contemporary Editorial & Visual Science Design System
   ========================================================================== */

:root {
  /* Color Palette */
  --bg-primary: #FBF9F5;
  --bg-secondary: #F4EFE6;
  --bg-card: #FFFFFF;
  --bg-accent-soft: #EBF6F7;
  --bg-warm-soft: #FFF8F0;
  
  --text-main: #1A2735;
  --text-heading: #0E1F38;
  --text-muted: #5A6872;
  --text-subtle: #7A8793;
  --text-inverse: #FFFFFF;
  
  --accent-teal: #0D7C85;
  --accent-teal-hover: #08585E;
  --accent-teal-light: #EBF6F7;
  
  --accent-amber: #D9822B;
  --accent-amber-hover: #B86B1E;
  --accent-amber-light: #FFF8F0;
  
  --border-light: #E7E2D8;
  --border-medium: #D5CEBF;
  --border-dark: #0E1F38;
  
  /* Typography */
  --font-editorial: "Newsreader", "Playfair Display", Georgia, "Times New Roman", serif;
  --font-sans: "Plus Jakarta Sans", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2.5rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;

  /* Layout */
  --max-width: 1240px;
  --max-article-width: 760px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 1px 3px rgba(14, 31, 56, 0.05);
  --shadow-md: 0 4px 12px rgba(14, 31, 56, 0.07);
  --shadow-lg: 0 12px 28px rgba(14, 31, 56, 0.09);
  
  --transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

a:hover {
  color: var(--accent-teal-hover);
}

button, input, select {
  font-family: inherit;
  font-size: inherit;
}

/* Typography Scale */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-heading);
  font-family: var(--font-editorial);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.015em;
}

h1 {
  font-size: clamp(2.2rem, 4vw, 3.5rem);
}

h2 {
  font-size: clamp(1.75rem, 3vw, 2.35rem);
}

h3 {
  font-size: clamp(1.3rem, 2vw, 1.65rem);
}

h4 {
  font-size: 1.15rem;
}

p {
  margin-bottom: 1.25rem;
}

p:last-child {
  margin-bottom: 0;
}

.lead-text {
  font-size: 1.2rem;
  line-height: 1.7;
  color: var(--text-heading);
  font-weight: 400;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-lg);
  padding-right: var(--spacing-lg);
}

.section {
  padding-top: var(--spacing-3xl);
  padding-bottom: var(--spacing-3xl);
}

.section-sm {
  padding-top: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
}

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

.section-header {
  margin-bottom: var(--spacing-2xl);
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-teal);
  background-color: var(--bg-accent-soft);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-sm);
}

.section-title {
  margin-bottom: var(--spacing-sm);
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 680px;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(251, 249, 245, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.site-logo img,
.site-logo svg {
  height: 42px;
  width: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-heading);
  padding: 6px 2px;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent-teal);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent-teal);
  border-radius: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 0.925rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--accent-teal);
  color: var(--text-inverse);
  box-shadow: 0 2px 6px rgba(13, 124, 133, 0.25);
}

.btn-primary:hover {
  background-color: var(--accent-teal-hover);
  color: var(--text-inverse);
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--border-medium);
  color: var(--text-heading);
}

.btn-outline:hover {
  border-color: var(--accent-teal);
  color: var(--accent-teal);
  background-color: var(--bg-accent-soft);
}

.btn-search-trigger {
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  padding: 8px 14px;
  border-radius: var(--radius-full);
  color: var(--text-muted);
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: var(--transition);
}

.btn-search-trigger:hover {
  border-color: var(--accent-teal);
  color: var(--text-heading);
}

.btn-mobile-menu {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text-heading);
}

/* Reading Progress Bar */
.reading-progress-bar {
  position: fixed;
  top: 74px;
  left: 0;
  height: 3px;
  background-color: var(--accent-teal);
  width: 0%;
  z-index: 999;
  transition: width 0.1s ease-out;
}

/* Hero Section */
.hero-editorial {
  padding-top: var(--spacing-2xl);
  padding-bottom: var(--spacing-3xl);
  border-bottom: 1px solid var(--border-light);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent-teal);
  background-color: var(--bg-accent-soft);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-md);
  border: 1px solid rgba(13, 124, 133, 0.15);
}

.hero-title {
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.025em;
}

.hero-lead {
  font-size: 1.175rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: var(--spacing-xl);
}

.hero-ctas {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-image-wrapper {
  position: relative;
}

.hero-image {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  object-fit: cover;
  aspect-ratio: 16 / 10;
}

.hero-image-caption {
  margin-top: 10px;
  font-size: 0.825rem;
  color: var(--text-subtle);
  font-style: italic;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Featured Article Banner */
.featured-article-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: var(--spacing-xl);
  align-items: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  margin-bottom: var(--spacing-3xl);
}

.featured-article-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-medium);
}

.featured-img-wrap {
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 16 / 10;
}

.featured-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.featured-article-card:hover .featured-img-wrap img {
  transform: scale(1.02);
}

.article-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-teal);
  background-color: var(--bg-accent-soft);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
}

.featured-title {
  margin-bottom: 12px;
  font-size: 1.85rem;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.825rem;
  color: var(--text-subtle);
  margin-top: 14px;
}

/* Categories Grid */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: var(--spacing-lg);
}

.category-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
}

.category-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-teal);
  box-shadow: var(--shadow-md);
}

.category-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--accent-teal);
  opacity: 0;
  transition: var(--transition);
}

.category-card:hover::before {
  opacity: 1;
}

.category-icon-box {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--bg-accent-soft);
  color: var(--accent-teal);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
}

.category-title {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.category-card-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.55;
  flex-grow: 1;
}

.category-card-link {
  margin-top: var(--spacing-md);
  font-size: 0.825rem;
  font-weight: 700;
  color: var(--accent-teal);
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Articles Grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--spacing-xl);
}

.article-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow-sm);
}

.article-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-medium);
}

.article-card-thumb {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: var(--bg-secondary);
}

.article-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.article-card:hover .article-card-thumb img {
  transform: scale(1.03);
}

.article-card-body {
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-card-title {
  font-size: 1.35rem;
  margin-bottom: 8px;
  line-height: 1.3;
}

.article-card-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
  flex-grow: 1;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-light);
  padding-top: 12px;
  margin-top: auto;
  font-size: 0.8rem;
  color: var(--text-subtle);
}

/* Interactive Eye Anatomy Explorer */
.interactive-anatomy-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
}

.anatomy-explorer-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.anatomy-svg-container {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 12px;
}

.anatomy-part-selector {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.anatomy-btn {
  text-align: left;
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  cursor: pointer;
  transition: var(--transition);
}

.anatomy-btn:hover,
.anatomy-btn.active {
  background-color: var(--bg-accent-soft);
  border-color: var(--accent-teal);
}

.anatomy-btn-title {
  font-weight: 700;
  color: var(--text-heading);
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.anatomy-btn-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.anatomy-detail-display {
  margin-top: 14px;
  padding: 16px;
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  border-left: 3px solid var(--accent-teal);
}

.anatomy-detail-title {
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 6px;
  font-size: 1.05rem;
}

.anatomy-detail-text {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Interactive 20-20-20 Timer Widget */
.timer-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.timer-circle {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  border: 6px solid var(--bg-accent-soft);
  border-top-color: var(--accent-teal);
  margin: 0 auto var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  transition: border-color 0.3s;
}

.timer-time {
  font-size: 2rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--text-heading);
}

.timer-status {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-teal);
  font-weight: 700;
}

.timer-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: var(--spacing-md);
}

/* FAQ Accordion */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

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

.faq-question {
  width: 100%;
  text-align: left;
  padding: 18px 22px;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-heading);
}

.faq-icon {
  font-size: 1.25rem;
  color: var(--accent-teal);
  transition: transform 0.3s ease;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  padding: 0 22px;
}

.faq-item.open .faq-answer {
  max-height: 400px;
  padding-bottom: 20px;
}

.faq-answer p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* Disclaimer Callout Box */
.disclaimer-banner {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.disclaimer-banner strong {
  color: var(--text-heading);
}

/* Article Template Styles */
.article-header {
  padding-top: var(--spacing-2xl);
  padding-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--border-light);
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-subtle);
  margin-bottom: var(--spacing-md);
}

.article-breadcrumb a {
  color: var(--text-muted);
}

.article-breadcrumb a:hover {
  color: var(--accent-teal);
}

.article-title-single {
  font-size: clamp(2rem, 3.5vw, 3rem);
  margin-bottom: var(--spacing-md);
  line-height: 1.22;
}

.article-dek {
  font-size: 1.225rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: var(--spacing-lg);
}

.article-byline {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.875rem;
  color: var(--text-subtle);
  flex-wrap: wrap;
}

.article-main-image {
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.article-main-image img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  max-height: 520px;
  object-fit: cover;
}

.article-img-caption {
  font-size: 0.825rem;
  color: var(--text-subtle);
  font-style: italic;
  margin-top: 10px;
  text-align: center;
}

/* Article Layout Grid (TOC + Body) */
.article-layout-grid {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: var(--spacing-2xl);
  position: relative;
  align-items: start;
}

.article-sidebar {
  position: sticky;
  top: 96px;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.toc-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 18px;
}

.toc-title {
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-heading);
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 8px;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toc-link {
  font-size: 0.825rem;
  color: var(--text-muted);
  line-height: 1.45;
  display: block;
  padding: 4px 6px;
  border-radius: 4px;
}

.toc-link:hover,
.toc-link.active {
  color: var(--accent-teal);
  background-color: var(--bg-accent-soft);
  font-weight: 600;
}

.article-content-body {
  max-width: var(--max-article-width);
  font-size: 1.075rem;
  line-height: 1.8;
  color: #243242;
}

.article-content-body h2 {
  font-size: 1.75rem;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border-light);
}

.article-content-body h3 {
  font-size: 1.35rem;
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
}

.article-content-body ul,
.article-content-body ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.article-content-body li {
  margin-bottom: 0.5rem;
}

/* Callout Boxes */
.callout-box {
  background-color: var(--bg-accent-soft);
  border-left: 4px solid var(--accent-teal);
  padding: var(--spacing-lg);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: var(--spacing-xl) 0;
}

.callout-title {
  font-weight: 700;
  color: var(--accent-teal);
  margin-bottom: 6px;
  font-size: 1rem;
}

.safety-box {
  background-color: var(--bg-warm-soft);
  border: 1px solid #F5D0A9;
  border-left: 4px solid var(--accent-amber);
  padding: var(--spacing-lg);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: var(--spacing-xl) 0;
}

.safety-title {
  font-weight: 700;
  color: var(--accent-amber);
  margin-bottom: 6px;
  font-size: 1rem;
}

.editorial-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-xl) 0;
  font-size: 0.925rem;
}

.editorial-table th,
.editorial-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}

.editorial-table th {
  background-color: var(--bg-secondary);
  color: var(--text-heading);
  font-weight: 700;
}

.references-list {
  list-style: none;
  padding-left: 0;
  margin-top: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--text-muted);
}

.references-list li {
  padding-bottom: 10px;
  margin-bottom: 10px;
  border-bottom: 1px dashed var(--border-light);
}

/* Related Articles */
.related-articles-section {
  margin-top: var(--spacing-3xl);
  padding-top: var(--spacing-2xl);
  border-top: 1px solid var(--border-light);
}

/* Search & Filter Library Page */
.library-search-bar {
  display: flex;
  gap: 12px;
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
}

.search-input-wrap {
  flex-grow: 1;
  min-width: 260px;
  position: relative;
}

.search-input {
  width: 100%;
  padding: 12px 18px 12px 42px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-medium);
  background-color: var(--bg-card);
  font-size: 0.95rem;
  transition: var(--transition);
}

.search-input:focus {
  outline: none;
  border-color: var(--accent-teal);
  box-shadow: 0 0 0 3px rgba(13, 124, 133, 0.15);
}

.search-icon-inside {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-subtle);
}

.filter-pills {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-2xl);
}

.filter-pill {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  padding: 6px 16px;
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}

.filter-pill:hover,
.filter-pill.active {
  background-color: var(--accent-teal);
  color: var(--text-inverse);
  border-color: var(--accent-teal);
}

.empty-results-box {
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-lg);
  background-color: var(--bg-card);
  border: 1px dashed var(--border-medium);
  border-radius: var(--radius-lg);
}

/* Footer */
.site-footer {
  margin-top: auto;
  background-color: #0A1628;
  color: #B5C2CE;
  padding-top: var(--spacing-3xl);
  padding-bottom: var(--spacing-xl);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-brand p {
  color: #8C9CAE;
  margin-top: 14px;
  line-height: 1.6;
  font-size: 0.875rem;
}

.footer-heading {
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #FFFFFF;
  margin-bottom: var(--spacing-md);
  font-family: var(--font-sans);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: #8C9CAE;
  text-decoration: none;
  font-size: 0.85rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: #FFFFFF;
}

.footer-bottom {
  border-top: 1px solid #1E2E44;
  padding-top: var(--spacing-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: #6C7E92;
  flex-wrap: wrap;
  gap: 12px;
}

/* Search Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(14, 31, 56, 0.6);
  backdrop-filter: blur(4px);
  z-index: 2000;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10vh;
}

.modal-overlay.open {
  display: flex;
}

.modal-content {
  background-color: var(--bg-card);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 600px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  border: 1px solid var(--border-light);
}

.modal-header {
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--border-light);
}

.modal-search-input {
  flex-grow: 1;
  border: none;
  font-size: 1.1rem;
  outline: none;
  background: transparent;
}

.modal-close-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-subtle);
}

.modal-results-list {
  max-height: 380px;
  overflow-y: auto;
  padding: 10px;
}

.modal-result-item {
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  display: block;
  text-decoration: none;
  transition: var(--transition);
}

.modal-result-item:hover {
  background-color: var(--bg-accent-soft);
}

.modal-result-title {
  font-weight: 700;
  color: var(--text-heading);
  font-size: 0.95rem;
}

.modal-result-snippet {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Floating Back to Top Button */
.btn-back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--text-heading);
  color: var(--text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 900;
}

.btn-back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.btn-back-to-top:hover {
  background-color: var(--accent-teal);
  transform: translateY(-2px);
}

/* Cookie Notice Banner */
.cookie-banner {
  position: fixed;
  bottom: 20px;
  left: 20px;
  right: 20px;
  max-width: 520px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 18px;
  box-shadow: var(--shadow-lg);
  z-index: 1500;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 0.875rem;
  color: var(--text-main);
}

.cookie-banner.hidden {
  display: none;
}

.cookie-banner-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .featured-article-card {
    grid-template-columns: 1fr;
  }
  
  .anatomy-explorer-grid {
    grid-template-columns: 1fr;
  }
  
  .article-layout-grid {
    grid-template-columns: 1fr;
  }
  
  .article-sidebar {
    position: static;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .site-nav {
    display: none;
    position: fixed;
    top: 74px;
    left: 0;
    width: 100%;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-light);
    flex-direction: column;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    gap: 1rem;
  }
  
  .site-nav.mobile-open {
    display: flex;
  }
  
  .btn-mobile-menu {
    display: block;
  }
  
  .articles-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
}