/* ===================================================================
   METEOTRONICS BLOG — Design System & Core Styles
   =================================================================== */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
  /* Primary palette */
  --color-primary: #0f4c81;
  --color-primary-dark: #0a3560;
  --color-primary-light: #1a6bb5;
  --color-accent: #1a5c9e;
  --color-accent-dark: #0f4c81;

  /* Neutral palette */
  --color-white: #ffffff;
  --color-off-white: #f7f8fa;
  --color-light-gray: #e9ecef;
  --color-mid-gray: #adb5bd;
  --color-dark-gray: #495057;
  --color-charcoal: #212529;
  --color-black: #0d1117;

  /* Category tag colors */
  --tag-meteorology: #0f4c81;
  --tag-radar: #e63946;
  --tag-instrumentation: #2a9d8f;
  --tag-climate: #e76f51;
  --tag-remote-sensing: #6a4c93;
  --tag-featured: #f4a261;

  /* Typography */
  --font-heading: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Font sizes (fluid) */
  --text-xs: clamp(0.7rem, 0.65rem + 0.25vw, 0.8rem);
  --text-sm: clamp(0.8rem, 0.75rem + 0.25vw, 0.9rem);
  --text-base: clamp(0.95rem, 0.9rem + 0.25vw, 1.05rem);
  --text-lg: clamp(1.1rem, 1rem + 0.5vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.2rem + 1.5vw, 2rem);
  --text-3xl: clamp(1.8rem, 1.4rem + 2vw, 2.5rem);
  --text-4xl: clamp(2.2rem, 1.6rem + 3vw, 3.2rem);

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

  /* Layout */
  --max-width: 1200px;
  --max-width-narrow: 800px;
  --border-radius: 8px;
  --border-radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --shadow-xl: 0 12px 40px rgba(0,0,0,0.15);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

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

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

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-charcoal);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

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

/* --- Utility Classes --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

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

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

/* ===================================================================
   HEADER / NAVIGATION
   =================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-light-gray);
  backdrop-filter: blur(10px);
  background: rgba(255,255,255,0.97);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.5px;
}

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

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--space-xl);
  align-items: center;
}

.nav-links a {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-dark-gray);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: var(--space-sm) 0;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

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

/* Search icon in nav */
.nav-search-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-dark-gray);
  padding: var(--space-sm);
  transition: color var(--transition-fast);
}

.nav-search-btn:hover {
  color: var(--color-primary);
}

/* Mobile menu toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-charcoal);
  transition: var(--transition-base);
}

/* ===================================================================
   HERO / FEATURED SECTION
   =================================================================== */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 60%, #061e38 100%);
  padding: var(--space-4xl) 0;
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.8;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.hero h1 {
  color: var(--color-white);
  font-size: var(--text-4xl);
  margin-bottom: var(--space-md);
  font-weight: 800;
}

.hero h1 .highlight {
  color: var(--color-accent);
}

.hero .tagline {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.8);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ===================================================================
   FEATURED ARTICLE (Large card at top)
   =================================================================== */
.featured-article {
  margin-top: -60px;
  position: relative;
  z-index: 10;
  margin-bottom: var(--space-3xl);
}

.featured-card {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.featured-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 50px rgba(0,0,0,0.18);
}

.featured-card__image {
  position: relative;
  min-height: 350px;
  overflow: hidden;
}

.featured-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.featured-card:hover .featured-card__image img {
  transform: scale(1.03);
}

.featured-badge {
  position: absolute;
  top: var(--space-lg);
  left: var(--space-lg);
  background: var(--tag-featured);
  color: var(--color-white);
  padding: var(--space-xs) var(--space-md);
  border-radius: 4px;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.featured-card__body {
  padding: var(--space-2xl);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.featured-card__tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--space-md);
  color: var(--tag-meteorology);
}

.featured-card__title {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-md);
  line-height: 1.3;
}

.featured-card__title a {
  color: var(--color-black);
}

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

.featured-card__excerpt {
  color: var(--color-dark-gray);
  margin-bottom: var(--space-xl);
  line-height: 1.7;
}

.featured-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: var(--text-sm);
  color: var(--color-mid-gray);
}

.read-more-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: gap var(--transition-base), color var(--transition-fast);
}

.read-more-btn:hover {
  color: var(--color-accent);
  gap: var(--space-md);
}

.read-more-btn svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-base);
}

.read-more-btn:hover svg {
  transform: translateX(4px);
}

/* ===================================================================
   CATEGORY FILTER BAR
   =================================================================== */
.filter-bar {
  margin-bottom: var(--space-2xl);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
}

.filter-btn {
  padding: var(--space-sm) var(--space-lg);
  border: 2px solid var(--color-light-gray);
  border-radius: 50px;
  background: var(--color-white);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-dark-gray);
  cursor: pointer;
  transition: var(--transition-fast);
  white-space: nowrap;
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

/* ===================================================================
   BLOG POST CARDS GRID
   =================================================================== */
.posts-section {
  padding: var(--space-2xl) 0 var(--space-4xl);
}

.posts-section__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-2xl);
}

.posts-section__title {
  font-size: var(--text-2xl);
  position: relative;
}

.posts-section__title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--color-accent);
  margin-top: var(--space-sm);
  border-radius: 2px;
}

.posts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

/* --- Individual Post Card --- */
.post-card {
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-light-gray);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
}

.post-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.post-card__image {
  position: relative;
  height: 220px;
  overflow: hidden;
}

.post-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.post-card:hover .post-card__image img {
  transform: scale(1.05);
}

.post-card__tags {
  position: absolute;
  bottom: var(--space-md);
  left: var(--space-md);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-white);
}

.tag--meteorology { background: var(--tag-meteorology); }
.tag--radar { background: var(--tag-radar); }
.tag--instrumentation { background: var(--tag-instrumentation); }
.tag--climate { background: var(--tag-climate); }
.tag--remote-sensing { background: var(--tag-remote-sensing); }
.tag--featured { background: var(--tag-featured); }

.post-card__body {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.post-card__date {
  font-size: var(--text-xs);
  color: var(--color-mid-gray);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--space-sm);
}

.post-card__title {
  font-size: var(--text-lg);
  margin-bottom: var(--space-sm);
  line-height: 1.35;
}

.post-card__title a {
  color: var(--color-black);
}

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

.post-card__excerpt {
  font-size: var(--text-sm);
  color: var(--color-dark-gray);
  margin-bottom: var(--space-lg);
  flex-grow: 1;
  line-height: 1.65;
}

.post-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-light-gray);
}

.post-card__author {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-xs);
  color: var(--color-mid-gray);
}

.post-card__read-time {
  font-size: var(--text-xs);
  color: var(--color-mid-gray);
}

/* ===================================================================
   PAGINATION
   =================================================================== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-3xl);
}

.pagination a,
.pagination span {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-dark-gray);
  border: 1px solid var(--color-light-gray);
  transition: var(--transition-fast);
}

.pagination a:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.pagination .active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

/* ===================================================================
   NEWSLETTER / SUBSCRIBE SECTION
   =================================================================== */
.newsletter {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  padding: var(--space-4xl) 0;
  color: var(--color-white);
  text-align: center;
}

.newsletter h2 {
  color: var(--color-white);
  font-size: var(--text-3xl);
  margin-bottom: var(--space-md);
}

.newsletter p {
  color: rgba(255,255,255,0.8);
  max-width: 500px;
  margin: 0 auto var(--space-xl);
}

.newsletter-form {
  display: flex;
  max-width: 500px;
  margin: 0 auto;
  gap: var(--space-sm);
}

.newsletter-form input[type="email"] {
  flex: 1;
  padding: var(--space-md) var(--space-lg);
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: var(--border-radius);
  background: rgba(255,255,255,0.1);
  color: var(--color-white);
  font-size: var(--text-base);
  transition: border-color var(--transition-fast);
}

.newsletter-form input[type="email"]::placeholder {
  color: rgba(255,255,255,0.5);
}

.newsletter-form input[type="email"]:focus {
  outline: none;
  border-color: var(--color-accent);
}

.newsletter-form button {
  padding: var(--space-md) var(--space-xl);
  background: var(--color-accent);
  color: var(--color-white);
  border: none;
  border-radius: var(--border-radius);
  font-size: var(--text-base);
  font-weight: 700;
  cursor: pointer;
  transition: background var(--transition-fast);
  white-space: nowrap;
}

.newsletter-form button:hover {
  background: var(--color-accent-dark);
}

/* ===================================================================
   FOOTER
   =================================================================== */
.site-footer {
  background: var(--color-black);
  color: rgba(255,255,255,0.7);
  padding: var(--space-4xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: var(--space-2xl);
  margin-bottom: var(--space-3xl);
}

.footer-brand .footer-logo {
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.footer-brand .footer-logo .logo-accent {
  color: var(--color-accent);
}

.footer-brand p {
  font-size: var(--text-sm);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.footer-social {
  display: flex;
  gap: var(--space-md);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.7);
  transition: var(--transition-fast);
}

.footer-social a:hover {
  background: var(--color-accent);
  color: var(--color-white);
}

.footer-col h4 {
  color: var(--color-white);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--space-lg);
}

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

.footer-col li {
  margin-bottom: var(--space-sm);
}

.footer-col a {
  color: rgba(255,255,255,0.6);
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-xl);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
}

.footer-bottom a {
  color: rgba(255,255,255,0.5);
}

.footer-bottom a:hover {
  color: var(--color-accent);
}

.footer-credit {
  width: 100%;
  text-align: center;
  margin-top: var(--space-md);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.45);
}

.footer-credit a {
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-credit a:hover {
  color: var(--color-accent);
}

/* ===================================================================
   SINGLE BLOG POST PAGE
   =================================================================== */
.post-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  padding: var(--space-4xl) 0 var(--space-2xl);
  color: var(--color-white);
}

.post-hero .breadcrumb {
  font-size: var(--text-sm);
  margin-bottom: var(--space-lg);
  color: rgba(255,255,255,0.6);
}

.post-hero .breadcrumb a {
  color: rgba(255,255,255,0.7);
}

.post-hero .breadcrumb a:hover {
  color: var(--color-accent);
}

.post-hero__title {
  font-size: var(--text-3xl);
  color: var(--color-white);
  max-width: 800px;
  margin-bottom: var(--space-lg);
}

.post-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  align-items: center;
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.7);
}

.post-hero__tags {
  display: flex;
  gap: var(--space-sm);
}

.post-content-wrapper {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--space-3xl);
  padding: var(--space-3xl) 0;
}

.post-content {
  max-width: 100%;
}

.post-content__featured-image {
  margin: calc(-1 * var(--space-3xl)) 0 var(--space-2xl);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.post-content__featured-image img {
  width: 100%;
  height: auto;
}

/* Article body typography */
.post-body h2 {
  font-size: var(--text-2xl);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-light-gray);
}

.post-body h3 {
  font-size: var(--text-xl);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
}

.post-body p {
  margin-bottom: var(--space-lg);
  line-height: 1.8;
}

.post-body ul, .post-body ol {
  margin-bottom: var(--space-lg);
  padding-left: var(--space-xl);
}

.post-body li {
  margin-bottom: var(--space-sm);
  line-height: 1.7;
}

.post-body blockquote {
  border-left: 4px solid var(--color-accent);
  padding: var(--space-lg) var(--space-xl);
  margin: var(--space-xl) 0;
  background: var(--color-off-white);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  font-style: italic;
  color: var(--color-dark-gray);
}

.post-body code {
  font-family: var(--font-mono);
  background: var(--color-off-white);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

.post-body pre {
  background: var(--color-charcoal);
  color: #e0e0e0;
  padding: var(--space-lg);
  border-radius: var(--border-radius);
  overflow-x: auto;
  margin-bottom: var(--space-lg);
}

.post-body pre code {
  background: none;
  padding: 0;
  color: inherit;
}

.post-body img {
  border-radius: var(--border-radius);
  margin: var(--space-xl) 0;
}

.post-body figure {
  margin: var(--space-xl) 0;
}

.post-body figcaption {
  font-size: var(--text-sm);
  color: var(--color-mid-gray);
  text-align: center;
  margin-top: var(--space-sm);
  font-style: italic;
}

/* --- Sidebar --- */
.sidebar {
  position: sticky;
  top: 90px;
}

.sidebar-widget {
  background: var(--color-off-white);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.sidebar-widget h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-accent);
}

.sidebar-widget ul {
  list-style: none;
}

.sidebar-widget li {
  margin-bottom: var(--space-sm);
}

.sidebar-widget li a {
  font-size: var(--text-sm);
  color: var(--color-dark-gray);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

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

.sidebar-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.sidebar-tags a {
  padding: var(--space-xs) var(--space-md);
  background: var(--color-white);
  border-radius: 50px;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-dark-gray);
  border: 1px solid var(--color-light-gray);
  transition: var(--transition-fast);
}

.sidebar-tags a:hover {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

/* Share buttons */
.share-buttons {
  display: flex;
  gap: var(--space-sm);
}

.share-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius);
  background: var(--color-white);
  border: 1px solid var(--color-light-gray);
  color: var(--color-dark-gray);
  transition: var(--transition-fast);
  cursor: pointer;
}

.share-btn:hover {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

/* Related posts */
.related-posts {
  padding: var(--space-3xl) 0;
  background: var(--color-off-white);
}

.related-posts h2 {
  text-align: center;
  font-size: var(--text-2xl);
  margin-bottom: var(--space-2xl);
}

/* ===================================================================
   ABOUT PAGE
   =================================================================== */
.about-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, #061e38 100%);
  padding: var(--space-4xl) 0;
  color: var(--color-white);
  text-align: center;
}

.about-hero h1 {
  color: var(--color-white);
  font-size: var(--text-4xl);
  margin-bottom: var(--space-md);
}

.about-hero p {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.8);
  max-width: 600px;
  margin: 0 auto;
}

.about-content {
  padding: var(--space-4xl) 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
  margin-bottom: var(--space-4xl);
}

.about-grid:nth-child(even) {
  direction: rtl;
}

.about-grid:nth-child(even) > * {
  direction: ltr;
}

.about-text h2 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-lg);
}

.about-text p {
  margin-bottom: var(--space-md);
  line-height: 1.8;
}

.focus-areas {
  padding: var(--space-4xl) 0;
  background: var(--color-off-white);
}

.focus-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.focus-card {
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  padding: var(--space-2xl);
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-light-gray);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.focus-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.focus-card__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-lg);
  color: var(--color-primary);
}

.focus-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-md);
}

.focus-card p {
  font-size: var(--text-sm);
  color: var(--color-dark-gray);
  line-height: 1.7;
}

/* ===================================================================
   SEARCH OVERLAY
   =================================================================== */
.search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.85);
  z-index: 2000;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
}

.search-overlay.active {
  display: flex;
}

.search-box {
  width: 90%;
  max-width: 600px;
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-xl);
}

.search-box input {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  border: 2px solid var(--color-light-gray);
  border-radius: var(--border-radius);
  font-size: var(--text-lg);
  outline: none;
  transition: border-color var(--transition-fast);
}

.search-box input:focus {
  border-color: var(--color-primary);
}

.search-close {
  position: absolute;
  top: var(--space-xl);
  right: var(--space-xl);
  background: none;
  border: none;
  color: var(--color-white);
  font-size: 2rem;
  cursor: pointer;
}

/* ===================================================================
   RESPONSIVE DESIGN
   =================================================================== */

/* Tablet */
@media (max-width: 1024px) {
  .posts-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .featured-card {
    grid-template-columns: 1fr;
  }

  .featured-card__image {
    min-height: 280px;
  }

  .post-content-wrapper {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

  .about-grid {
    grid-template-columns: 1fr;
  }

  .about-grid:nth-child(even) {
    direction: ltr;
  }
}

/* Mobile */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-md);
    box-shadow: var(--shadow-lg);
    border-top: 1px solid var(--color-light-gray);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .posts-grid {
    grid-template-columns: 1fr;
  }

  .focus-cards {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .newsletter-form {
    flex-direction: column;
  }

  .hero {
    padding: var(--space-3xl) 0;
  }

  .featured-article {
    margin-top: -30px;
  }

  .pagination a,
  .pagination span {
    width: 36px;
    height: 36px;
    font-size: var(--text-xs);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
}

/* Small mobile */
@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }

  .featured-card__body {
    padding: var(--space-lg);
  }

  .post-card__image {
    height: 180px;
  }
}

/* ===================================================================
   ANIMATIONS & TRANSITIONS
   =================================================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.animate-in:nth-child(1) { animation-delay: 0.1s; }
.animate-in:nth-child(2) { animation-delay: 0.2s; }
.animate-in:nth-child(3) { animation-delay: 0.3s; }
.animate-in:nth-child(4) { animation-delay: 0.4s; }
.animate-in:nth-child(5) { animation-delay: 0.5s; }
.animate-in:nth-child(6) { animation-delay: 0.6s; }

/* Print styles */
@media print {
  .site-header,
  .newsletter,
  .site-footer,
  .sidebar,
  .share-buttons,
  .filter-bar,
  .pagination {
    display: none !important;
  }

  .post-content-wrapper {
    grid-template-columns: 1fr;
  }

  body {
    font-size: 12pt;
    color: #000;
  }
}