:root {
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --bg-primary: #f8fafc;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-muted: #f1f5f9;
  --bg-subtle: #f8fafc;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --border-subtle: #cbd5e1;
  --accent-color: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-light: #eff6ff;
  --accent-gradient: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
  --badge-bg: #dbeafe;
  --badge-text: #1d4ed8;
  --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --card-shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --header-bg: rgba(255, 255, 255, 0.85);
  --code-bg: #f1f5f9;
  --callout-bg: #f0fdf4;
  --callout-border: #86efac;
  --callout-text: #166534;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --transition: all 0.25s ease;
}

[data-theme="dark"] {
  --bg-primary: #0a0f1d;
  --bg-surface: #111827;
  --bg-card: #151d30;
  --bg-muted: #1e293b;
  --bg-subtle: #17223b;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --border-color: #243049;
  --border-subtle: #334155;
  --accent-color: #3b82f6;
  --accent-hover: #60a5fa;
  --accent-light: rgba(59, 130, 246, 0.15);
  --accent-gradient: linear-gradient(135deg, #3b82f6 0%, #a855f7 100%);
  --badge-bg: rgba(59, 130, 246, 0.2);
  --badge-text: #93c5fd;
  --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
  --card-shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
  --header-bg: rgba(17, 24, 39, 0.85);
  --code-bg: #1e293b;
  --callout-bg: rgba(16, 185, 129, 0.1);
  --callout-border: #059669;
  --callout-text: #6ee7b7;
}

/* Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  font-size: 16px;
  transition: background-color 0.3s ease, color 0.3s ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.logo-icon-svg {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  box-shadow: 0 4px 10px rgba(79, 70, 229, 0.35);
  transition: transform 0.2s ease;
}

.logo:hover .logo-icon-svg {
  transform: scale(1.06);
}

.logo-badge {
  background: var(--accent-gradient);
  color: #ffffff;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 700;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-link {
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 0.95rem;
  position: relative;
  padding: 0.4rem 0;
}

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

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

/* Theme Toggle Button */
.theme-toggle-btn {
  background: var(--bg-muted);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  cursor: pointer;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.theme-toggle-btn:hover {
  background: var(--border-color);
  transform: scale(1.05);
}

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.theme-toggle-btn .icon-moon {
  display: block;
}

.theme-toggle-btn .icon-sun {
  display: none;
}

[data-theme="dark"] .theme-toggle-btn .icon-moon {
  display: none;
}

[data-theme="dark"] .theme-toggle-btn .icon-sun {
  display: block;
}

/* Mobile Menu Toggle */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.5rem;
}

/* Reading Progress Bar */
.reading-progress-bar {
  position: fixed;
  top: 72px;
  left: 0;
  width: 0%;
  height: 3px;
  background: var(--accent-gradient);
  z-index: 49;
  transition: width 0.1s linear;
}

/* Hero Section */
.hero-section {
  padding: 4rem 0 2.5rem;
  text-align: center;
  background: radial-gradient(circle at 50% 20%, var(--accent-light) 0%, transparent 60%);
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  background: var(--badge-bg);
  color: var(--badge-text);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  max-width: 840px;
  margin-left: auto;
  margin-right: auto;
}

.hero-gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 2.5rem;
}

/* Search Bar & Filter Controls */
.controls-wrapper {
  margin-bottom: 3rem;
}

.search-box-container {
  max-width: 620px;
  margin: 0 auto 1.5rem;
  position: relative;
}

.search-input {
  width: 100%;
  padding: 0.95rem 1.25rem 0.95rem 3rem;
  font-size: 1rem;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-primary);
  box-shadow: var(--card-shadow);
  outline: none;
  transition: var(--transition);
}

.search-input:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 4px var(--accent-light);
}

.search-icon {
  position: absolute;
  left: 1.15rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

/* Category Filter Pills */
.category-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  list-style: none;
  margin-top: 1rem;
}

.filter-btn {
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover {
  background: var(--bg-muted);
  color: var(--text-primary);
}

.filter-btn.active {
  background: var(--accent-color);
  color: #ffffff;
  border-color: var(--accent-color);
}

/* Featured Section */
.featured-section {
  margin-bottom: 3.5rem;
}

.featured-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: var(--transition);
}

.featured-card:hover {
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-3px);
}

.featured-banner {
  background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 50%, #9333ea 100%);
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2.5rem;
  color: #ffffff;
  position: relative;
  overflow: hidden;
}

.featured-banner::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 80% 20%, rgba(255,255,255,0.2) 0%, transparent 50%);
}

.featured-banner-icon {
  font-size: 5rem;
  z-index: 1;
}

.featured-content {
  padding: 2.5rem 2.5rem 2.5rem 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* Blog Cards Grid */
.blog-grid-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.section-heading {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.blog-count {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
  margin-bottom: 3.5rem;
}

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

.blog-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--card-shadow-hover);
  border-color: var(--border-subtle);
}

.card-header-art {
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  color: #ffffff;
  padding: 1.5rem;
  text-align: center;
}

.art-icon {
  font-size: 3rem;
  filter: drop-shadow(0 4px 6px rgba(0,0,0,0.2));
}

.card-body {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-meta-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
  font-size: 0.85rem;
}

.card-category {
  padding: 0.25rem 0.65rem;
  background: var(--badge-bg);
  color: var(--badge-text);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.card-read-time {
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 0.85rem;
  letter-spacing: -0.01em;
}

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

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

.card-excerpt {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.55;
  margin-bottom: 1.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex-grow: 1;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.88rem;
}

.card-author {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.author-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
}

.author-name {
  font-weight: 600;
  color: var(--text-primary);
}

.card-read-link {
  font-weight: 600;
  color: var(--accent-color);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.card-read-link:hover {
  gap: 0.55rem;
}

/* Load More Button Section */
.load-more-section {
  text-align: center;
  margin: 1rem 0 5rem;
}

.btn-load-more {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.95rem 2.25rem;
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--card-shadow);
  transition: var(--transition);
}

.btn-load-more:hover {
  background: var(--accent-color);
  color: #ffffff;
  border-color: var(--accent-color);
  transform: translateY(-2px);
  box-shadow: var(--card-shadow-hover);
}

.btn-load-more:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.load-more-status {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
  display: none;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Article Detail Page */
.article-container {
  max-width: 860px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 5rem;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

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

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

.article-header {
  margin-bottom: 3rem;
}

.article-title {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.025em;
  margin: 1rem 0 1.25rem;
}

.article-lead {
  font-size: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.75rem;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  flex-wrap: wrap;
  gap: 1rem;
}

.article-author-info {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.article-author-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1.1rem;
}

.article-author-details .name {
  font-weight: 700;
  color: var(--text-primary);
  font-size: 1rem;
}

.article-author-details .date {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.share-buttons {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.share-btn {
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  background: var(--bg-muted);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid var(--border-color);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition);
}

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

/* Key Takeaways Box */
.takeaways-box {
  background: var(--bg-muted);
  border-left: 4px solid var(--accent-color);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1.75rem;
  margin: 2.5rem 0;
}

.takeaways-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent-color);
}

.takeaways-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.takeaways-list li {
  position: relative;
  padding-left: 1.5rem;
  color: var(--text-secondary);
}

.takeaways-list li::before {
  content: "✔";
  position: absolute;
  left: 0;
  color: var(--accent-color);
  font-weight: bold;
}

/* Prose Typography in Article */
.article-content {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.article-content h2 {
  font-size: 1.85rem;
  font-weight: 800;
  margin: 2.75rem 0 1.25rem;
  letter-spacing: -0.02em;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.article-content h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin: 2rem 0 1rem;
}

.article-content p {
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
}

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

.article-content ul,
.article-content ol {
  margin: 1.5rem 0;
  padding-left: 1.75rem;
  color: var(--text-secondary);
}

.article-content li {
  margin-bottom: 0.65rem;
}

.article-content blockquote {
  border-left: 4px solid var(--accent-color);
  padding: 1rem 1.5rem;
  margin: 2rem 0;
  background: var(--bg-muted);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
  color: var(--text-primary);
}

.article-callout {
  padding: 1.5rem;
  border-radius: var(--radius-md);
  margin: 2rem 0;
  background: var(--callout-bg);
  border: 1px solid var(--callout-border);
  color: var(--callout-text);
}

.article-callout h4 {
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.article-callout p {
  margin: 0;
  color: inherit;
}

.spec-table-wrapper {
  overflow-x: auto;
  margin: 2.5rem 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.spec-table th,
.spec-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.spec-table th {
  background: var(--bg-muted);
  font-weight: 700;
  font-size: 0.95rem;
}

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

/* Article Tags */
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 3.5rem 0 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.tag-pill {
  padding: 0.35rem 0.85rem;
  background: var(--bg-muted);
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  border: 1px solid var(--border-color);
}

/* Author Bio Card */
.author-bio-card {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin: 3rem 0;
  box-shadow: var(--card-shadow);
}

.author-bio-avatar {
  width: 70px;
  height: 70px;
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.75rem;
  font-weight: 800;
  flex-shrink: 0;
}

.author-bio-name {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.author-bio-role {
  font-size: 0.85rem;
  color: var(--accent-color);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.author-bio-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* Related Posts Section */
.related-posts-section {
  margin-top: 4rem;
  padding-top: 3rem;
  border-top: 1px solid var(--border-color);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

/* Pages: About & Contact */
.page-header {
  padding: 4rem 0 2rem;
  text-align: center;
}

.page-title {
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 1rem;
}

.page-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto;
}

.page-content-wrapper {
  max-width: 900px;
  margin: 0 auto;
  padding: 1rem 1.5rem 5rem;
}

.about-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 3rem 0;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem;
  text-align: center;
  box-shadow: var(--card-shadow);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent-color);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.team-member-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  text-align: center;
}

.team-avatar {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto 1rem;
}

/* Contact Page Layout */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  gap: 3rem;
  margin-top: 2rem;
}

.contact-info-cards {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  box-shadow: var(--card-shadow);
}

.contact-card h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.contact-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.contact-form-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--card-shadow);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  transition: var(--transition);
  outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.form-textarea {
  resize: vertical;
  min-height: 140px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 2rem;
  background: var(--accent-color);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  width: 100%;
}

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

.alert-success {
  background: var(--callout-bg);
  border: 1px solid var(--callout-border);
  color: var(--callout-text);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.5rem;
  font-weight: 500;
}

/* Footer */
.site-footer {
  margin-top: auto;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-top: 1rem;
  line-height: 1.6;
  max-width: 340px;
}

.footer-heading {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

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

.newsletter-form {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.85rem;
}

.newsletter-input {
  flex-grow: 1;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 0.88rem;
}

.newsletter-btn {
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--accent-color);
  color: #fff;
  border: none;
  font-weight: 600;
  cursor: pointer;
  font-size: 0.88rem;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.88rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 1rem;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 999;
}

.toast {
  background: var(--text-primary);
  color: var(--bg-surface);
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-md);
  box-shadow: var(--card-shadow-hover);
  font-weight: 500;
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Responsive Design */
@media (max-width: 992px) {
  .featured-card {
    grid-template-columns: 1fr;
  }
  .featured-content {
    padding: 2rem;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem;
    box-shadow: var(--card-shadow-hover);
    z-index: 100;
  }
  .mobile-menu-btn {
    display: block;
  }
  .hero-title {
    font-size: 2.25rem;
  }
  .article-title {
    font-size: 2rem;
  }
  .about-stats-grid {
    grid-template-columns: 1fr;
  }
  .blog-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* Stock Blog Images */
.card-header-art {
  height: 180px;
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.card-art-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
}
.blog-card:hover .card-art-img {
  transform: scale(1.05);
}
.featured-banner {
  overflow: hidden;
  position: relative;
}
.featured-banner-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.article-featured-image {
  width: 100%;
  max-height: 420px;
  object-fit: cover;
  border-radius: 14px;
  margin-bottom: 2rem;
  display: block;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}