/* =========================================================
   Meselium — Sağlık ve Yaşam Rehberi
   Professional Medical Blog Design System
   ========================================================= */

/* --- CSS Custom Properties --- */
:root {
  /* Brand Colors */
  --color-primary: #17807c;
  --color-primary-dark: #116360;
  --color-primary-light: #2cb1ac;
  --color-primary-50: rgba(23, 128, 124, 0.08);
  --color-primary-100: rgba(23, 128, 124, 0.15);

  --color-navy: #192f5b;
  --color-navy-dark: #0f1f3d;
  --color-navy-light: #2a4a7f;

  /* Neutral Colors */
  --color-white: #ffffff;
  --color-gray-50: #f8fafb;
  --color-gray-100: #f1f4f7;
  --color-gray-200: #e2e7ed;
  --color-gray-300: #cdd4dc;
  --color-gray-400: #9aa5b4;
  --color-gray-500: #6b7a8d;
  --color-gray-600: #4a5568;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* Semantic Colors */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;

  /* Background */
  --bg-body: #f8fafb;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f8f7;
  --bg-header: rgba(255, 255, 255, 0.92);
  --bg-footer: #0f1f3d;

  /* Text */
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --text-inverse: #ffffff;
  --text-link: #2cb1ac;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;

  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout */
  --max-width: 1200px;
  --max-width-narrow: 780px;
  --max-width-article: 720px;
  --sidebar-width: 320px;
  --header-height: 72px;

  /* Borders & Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  --border-color: #e2e7ed;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 40px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
  --transition-spring: 350ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* --- Dark Mode --- */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-body: #0d1117;
    --bg-card: #161b22;
    --bg-card-hover: #1c2333;
    --bg-header: rgba(13, 17, 23, 0.92);
    --bg-footer: #010409;

    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --text-link: #3fcbc6;

    --border-color: #30363d;
    --color-gray-50: #161b22;
    --color-gray-100: #1c2333;
    --color-gray-200: #30363d;

    --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.4);
  }
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: var(--text-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

/* --- Utilities --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container--narrow {
  max-width: var(--max-width-narrow);
}

.container--article {
  max-width: var(--max-width-article);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* --- Header / Navbar --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-header);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  height: var(--header-height);
  transition: box-shadow var(--transition-base);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--text-primary);
}

.site-logo svg {
  width: 40px;
  height: 40px;
}

.site-logo-text {
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-navy);
}

.site-logo-text span {
  color: var(--color-primary);
}

@media (prefers-color-scheme: dark) {
  .site-logo-text {
    color: var(--text-primary);
  }
}

/* Nav */
.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-primary);
  background: var(--color-primary-50);
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  padding: var(--space-2);
  cursor: pointer;
  color: var(--text-primary);
}

.menu-toggle svg {
  width: 24px;
  height: 24px;
}

@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: var(--space-4);
    gap: var(--space-1);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
  }

  .site-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .site-nav a {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-base);
  }
}

/* --- Hero Section --- */
.hero {
  padding: var(--space-24) 0 var(--space-20);
  text-align: center;
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle at 50% 0%, var(--color-primary-100) 0%, transparent 75%),
              linear-gradient(180deg, var(--bg-body) 0%, rgba(23, 128, 124, 0.03) 100%);
  border-bottom: 1px solid var(--border-color);
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  left: 50%;
  transform: translateX(-50%);
  width: 1000px;
  height: 600px;
  background: radial-gradient(ellipse, rgba(44, 177, 172, 0.18) 0%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
  z-index: 0;
}

.hero > * {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--color-primary-dark);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-6);
  border: 1px solid var(--color-primary-100);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-spring);
}

.hero-badge:hover {
  transform: scale(1.05);
}

@media (prefers-color-scheme: dark) {
  .hero-badge {
    background: rgba(22, 27, 34, 0.85);
    color: var(--color-primary-light);
  }
}

.hero-badge svg {
  width: 16px;
  height: 16px;
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: var(--text-5xl);
  font-weight: 800;
  line-height: var(--leading-tight);
  color: var(--text-primary);
  margin-bottom: var(--space-5);
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

@media (prefers-color-scheme: dark) {
  .hero h1 {
    background: linear-gradient(135deg, #ffffff 0%, var(--color-primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }
}

.hero p {
  font-size: var(--text-xl);
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto var(--space-8);
  line-height: var(--leading-relaxed);
}

@media (max-width: 768px) {
  .hero {
    padding: var(--space-16) 0 var(--space-12);
  }
  .hero h1 {
    font-size: var(--text-3xl);
  }
  .hero p {
    font-size: var(--text-base);
  }
}

/* --- Category Tabs --- */
.category-tabs {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
  margin: var(--space-10) 0 var(--space-12);
}

.category-tab {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-spring);
  text-decoration: none;
  box-shadow: var(--shadow-xs);
}

.category-tab:hover,
.category-tab.active {
  color: var(--text-inverse);
  border-color: var(--color-primary);
  background: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.category-tab svg {
  width: 16px;
  height: 16px;
}

/* --- Section Headers --- */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-8);
}

.section-header h2 {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--text-primary);
}

.section-header a {
  font-size: var(--text-sm);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

/* --- Article Cards & Grid Aliases --- */
.article-grid,
.grid--3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-16);
}

@media (max-width: 1024px) {
  .article-grid,
  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .article-grid,
  .grid--3 {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}

.article-card,
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-spring);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
}

.article-card:hover,
.card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.article-card__image,
.card__image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: var(--color-gray-100);
  transition: transform var(--transition-slow);
}

.article-card:hover .article-card__image,
.card:hover .card__image {
  transform: scale(1.04);
}

.article-card__image-wrapper,
.card__image-wrapper {
  overflow: hidden;
  position: relative;
}

.article-card__body,
.card__content {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.article-card__category,
.card__category {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.article-card__title,
.card__title {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: var(--leading-snug);
  color: var(--text-primary);
  margin-bottom: var(--space-3);
  transition: color var(--transition-fast);
}

.article-card__title a,
.card__title a {
  color: inherit;
  text-decoration: none;
}

.article-card:hover .article-card__title,
.card:hover .card__title {
  color: var(--color-primary);
}

.article-card__excerpt,
.card__excerpt {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--text-muted);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-color);
}

.article-card__meta svg {
  width: 14px;
  height: 14px;
}

.article-card__meta-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

/* Featured Card (larger) */
.article-card--featured {
  grid-column: span 2;
}

.article-card--featured .article-card__image {
  height: 280px;
}

.article-card--featured .article-card__title {
  font-size: var(--text-2xl);
}

@media (max-width: 640px) {
  .article-card--featured {
    grid-column: span 1;
  }
  .article-card--featured .article-card__image {
    height: 200px;
  }
  .article-card--featured .article-card__title {
    font-size: var(--text-lg);
  }
}

/* --- Article List (alternative layout) --- */
.article-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-16);
}

.article-list-item {
  display: flex;
  gap: var(--space-5);
  padding: var(--space-5);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.article-list-item:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-sm);
}

.article-list-item__image {
  width: 180px;
  min-width: 180px;
  height: 130px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  background: var(--color-gray-100);
}

.article-list-item__body {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.article-list-item__category {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.article-list-item__title {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 600;
  line-height: var(--leading-snug);
  margin-bottom: var(--space-2);
}

.article-list-item__title a {
  color: var(--text-primary);
  text-decoration: none;
}

.article-list-item:hover .article-list-item__title a {
  color: var(--color-primary);
}

.article-list-item__excerpt {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-list-item__meta {
  font-size: var(--text-xs);
  color: var(--text-muted);
  display: flex;
  gap: var(--space-3);
}

@media (max-width: 640px) {
  .article-list-item {
    flex-direction: column;
  }
  .article-list-item__image {
    width: 100%;
    height: 180px;
  }
}

/* --- Article Detail Page --- */
.article-header {
  padding: var(--space-12) 0 var(--space-8);
  text-align: center;
}

.article-header__category {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-4);
  background: var(--color-primary-50);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.article-header h1 {
  font-family: var(--font-serif);
  font-size: var(--text-4xl);
  font-weight: 700;
  line-height: var(--leading-tight);
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.article-header__meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.article-header__meta-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.article-header__meta-item svg {
  width: 16px;
  height: 16px;
}

.article-header__meta-divider {
  width: 4px;
  height: 4px;
  background: var(--color-gray-300);
  border-radius: 50%;
}

@media (max-width: 768px) {
  .article-header h1 {
    font-size: var(--text-2xl);
  }
  .article-header {
    padding: var(--space-8) 0 var(--space-6);
  }
}

/* Article hero image */
.article-hero-image {
  width: 100%;
  max-height: 480px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-10);
}

/* Article content (prose) */
.article-content {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--text-primary);
}

.article-content h2 {
  font-family: var(--font-sans);
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
  color: var(--text-primary);
  padding-bottom: var(--space-2);
  border-bottom: 2px solid var(--color-primary-50);
}

.article-content h3 {
  font-family: var(--font-sans);
  font-size: var(--text-xl);
  font-weight: 600;
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
  color: var(--text-primary);
}

.article-content p {
  margin-bottom: var(--space-5);
}

.article-content ul,
.article-content ol {
  margin-bottom: var(--space-5);
  padding-left: var(--space-6);
}

.article-content li {
  margin-bottom: var(--space-2);
}

.article-content blockquote {
  border-left: 4px solid var(--color-primary);
  padding: var(--space-4) var(--space-6);
  margin: var(--space-6) 0;
  background: var(--color-primary-50);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
}

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

.article-content img {
  border-radius: var(--radius-md);
  margin: var(--space-6) 0;
}

.article-content a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-color: var(--color-primary-100);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--transition-fast);
}

.article-content a:hover {
  text-decoration-color: var(--color-primary);
}

/* Table of Contents */
.toc {
  background: var(--color-gray-50);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-6);
  margin-bottom: var(--space-8);
}

.toc__title {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: var(--space-3);
}

.toc ol {
  list-style: none;
  padding: 0;
  counter-reset: toc-counter;
}

.toc li {
  counter-increment: toc-counter;
  margin-bottom: var(--space-2);
}

.toc li a {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) 0;
  transition: color var(--transition-fast);
}

.toc li a::before {
  content: counter(toc-counter) ".";
  font-weight: 600;
  color: var(--color-primary);
  min-width: 20px;
}

.toc li a:hover {
  color: var(--color-primary);
}

/* Disclaimer box */
.disclaimer {
  background: #fffbeb;
  border: 1px solid #fcd34d;
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  margin: var(--space-8) 0;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: #92400e;
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
}

.disclaimer svg {
  width: 20px;
  height: 20px;
  min-width: 20px;
  color: #f59e0b;
  margin-top: 1px;
}

@media (prefers-color-scheme: dark) {
  .disclaimer {
    background: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.3);
    color: #fcd34d;
  }
}

/* Author box */
.author-box {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--color-gray-50);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin: var(--space-10) 0;
}

.author-box__avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-primary-50);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  min-width: 56px;
}

.author-box__info h4 {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.author-box__info p {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-normal);
}

/* Related articles */
.related-articles {
  padding: var(--space-12) 0;
  border-top: 1px solid var(--border-color);
  margin-top: var(--space-12);
}

.related-articles h3 {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-6);
}

/* --- Breadcrumb --- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--text-muted);
  padding: var(--space-4) 0;
}

.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

.breadcrumb__separator {
  color: var(--color-gray-300);
}

.breadcrumb__current {
  color: var(--text-secondary);
  font-weight: 500;
}

/* --- Stats / Trust Indicators --- */
.trust-bar {
  display: flex;
  justify-content: center;
  gap: var(--space-10);
  padding: var(--space-8) 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: var(--space-12);
}

.trust-item {
  text-align: center;
}

.trust-item__number {
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.trust-item__label {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-top: var(--space-1);
}

@media (max-width: 640px) {
  .trust-bar {
    gap: var(--space-6);
    flex-wrap: wrap;
  }
  .trust-item__number {
    font-size: var(--text-2xl);
  }
}

/* --- Newsletter / CTA --- */
.newsletter-cta {
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-dark) 100%);
  border-radius: var(--radius-xl);
  padding: var(--space-12) var(--space-8);
  text-align: center;
  margin-bottom: var(--space-16);
  position: relative;
  overflow: hidden;
}

.newsletter-cta::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(44, 177, 172, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.newsletter-cta h2 {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--text-inverse);
  margin-bottom: var(--space-3);
  position: relative;
}

.newsletter-cta p {
  font-size: var(--text-base);
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--space-6);
  position: relative;
}

/* --- Footer --- */
.site-footer {
  background: var(--bg-footer);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-10);
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-brand {
  max-width: 300px;
}

.footer-brand .site-logo-text {
  color: var(--text-inverse);
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
}

.footer-brand p {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: rgba(255, 255, 255, 0.5);
}

.footer-column h4 {
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-4);
}

.footer-column ul {
  list-style: none;
  padding: 0;
}

.footer-column li {
  margin-bottom: var(--space-2);
}

.footer-column a {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-column a:hover {
  color: var(--color-primary-light);
}

.footer-bottom {
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-bottom p {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.4);
}

.footer-disclaimer {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.3);
  max-width: 600px;
  line-height: var(--leading-relaxed);
  margin-top: var(--space-4);
}

/* --- Page Header (for listing pages) --- */
.page-header {
  padding: var(--space-12) 0 var(--space-8);
  text-align: center;
}

.page-header h1 {
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
}

.page-header p {
  font-size: var(--text-base);
  color: var(--text-secondary);
  max-width: 480px;
  margin: 0 auto;
}

/* --- 404 Page --- */
.error-page {
  min-height: calc(100vh - var(--header-height) - 200px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-16) 0;
}

.error-page__code {
  font-size: 8rem;
  font-weight: 800;
  color: var(--color-primary-50);
  line-height: 1;
  margin-bottom: var(--space-4);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.error-page h1 {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  margin-bottom: var(--space-3);
}

.error-page p {
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-decoration: none;
  cursor: pointer;
  border: none;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--text-inverse);
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  color: var(--text-inverse);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

.btn--outline:hover {
  background: var(--color-primary-50);
  color: var(--color-primary-dark);
}

/* --- Contact Page --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-16);
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

.contact-card {
  padding: var(--space-6);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  text-align: center;
}

.contact-card__icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-4);
  background: var(--color-primary-50);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.contact-card__icon svg {
  width: 24px;
  height: 24px;
}

.contact-card h3 {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.contact-card p {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.contact-card a {
  color: var(--color-primary);
}

/* --- About Page --- */
.about-content {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  max-width: var(--max-width-article);
  margin: 0 auto;
  padding-bottom: var(--space-16);
}

.about-content h2 {
  font-family: var(--font-sans);
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
  color: var(--text-primary);
}

.about-content p {
  margin-bottom: var(--space-5);
  color: var(--text-secondary);
}

/* --- Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
  opacity: 0;
}

.fade-in-up:nth-child(1) { animation-delay: 0.05s; }
.fade-in-up:nth-child(2) { animation-delay: 0.1s; }
.fade-in-up:nth-child(3) { animation-delay: 0.15s; }
.fade-in-up:nth-child(4) { animation-delay: 0.2s; }
.fade-in-up:nth-child(5) { animation-delay: 0.25s; }
.fade-in-up:nth-child(6) { animation-delay: 0.3s; }

/* Lazy image loading animation */
img[loading="lazy"] {
  opacity: 0;
  transition: opacity var(--transition-slow);
}

img[loading="lazy"].loaded,
img[loading="lazy"][complete] {
  opacity: 1;
}

/* --- Print Styles --- */
@media print {
  .site-header,
  .site-footer,
  .newsletter-cta,
  .related-articles,
  .toc,
  .category-tabs {
    display: none !important;
  }
  body {
    background: white;
    color: black;
    font-size: 12pt;
  }
  .article-content {
    max-width: 100%;
  }
}