/* =============================================
   Clash工具网 — Astro Blog Theme
   Inspired by AstroPaper / TailBlog
   ============================================= */

/* --- CSS Custom Properties --- */
:root {
  --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Light theme */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #94a3b8;
  --border-color: #e2e8f0;
  --accent: #6366F1;
  --accent-hover: #4F46E5;
  --accent-light: #EEF2FF;
  --accent-glow: rgba(99, 102, 241, 0.15);
  --card-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --card-shadow-hover: 0 10px 25px rgba(0,0,0,0.08), 0 4px 10px rgba(0,0,0,0.04);
  --header-bg: rgba(255,255,255,0.85);
  --code-bg: #f8fafc;
  --hero-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
  --radius: 12px;
  --radius-sm: 8px;
  --max-w: 1200px;
  --content-w: 860px;
}

[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-tertiary: #64748b;
  --border-color: #334155;
  --accent: #818CF8;
  --accent-hover: #6366F1;
  --accent-light: #1E1B4B;
  --accent-glow: rgba(129, 140, 248, 0.15);
  --card-shadow: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
  --card-shadow-hover: 0 10px 25px rgba(0,0,0,0.4), 0 4px 10px rgba(0,0,0,0.3);
  --header-bg: rgba(15,23,42,0.9);
  --code-bg: #1e293b;
  --hero-gradient: linear-gradient(135deg, #0f172a 0%, #1a1a2e 50%, #16213e 100%);
}

/* --- 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-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s, color 0.3s;
}

a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent-hover); }
img { max-width: 100%; height: auto; }
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 1.5rem; }

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: background 0.3s, border-color 0.3s;
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  flex-shrink: 0;
}
.logo:hover { color: var(--text-primary); }
.logo-icon { font-size: 1.4rem; }
.logo-highlight { color: var(--accent); }

.main-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  padding: 0.4rem 0.85rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s, background 0.2s;
}
.nav-link:hover { color: var(--text-primary); background: var(--bg-tertiary); }
.nav-link.active { color: var(--accent); background: var(--accent-light); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Theme toggle */
.theme-toggle {
  width: 36px; height: 36px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }

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

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  width: 36px; height: 36px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border: none;
  background: none;
  cursor: pointer;
  padding: 0;
}
.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s;
}
.menu-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* --- Hero --- */
.hero {
  background: var(--hero-gradient);
  color: #fff;
  padding: 4rem 1.5rem;
  text-align: center;
  margin-bottom: 2.5rem;
}

.hero-inner {
  max-width: 680px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.18);
  padding: 0.35rem 1rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 1.25rem;
  backdrop-filter: blur(4px);
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}
.hero-accent { color: var(--accent); }

.hero-sub {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.75);
  max-width: 520px;
  margin: 0 auto 1.75rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.5rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }
.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.4);
}
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: #fff; color: #fff; }
.btn-small { padding: 0.4rem 1rem; font-size: 0.85rem; }

/* --- Featured Section --- */
.featured-section {
  max-width: var(--max-w);
  margin: 0 auto 2.5rem;
  padding: 0 1.5rem;
}

.section-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.featured-card {
  display: block;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 2rem;
  text-decoration: none;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}
.featured-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px; height: 100%;
  background: var(--accent);
  border-radius: 4px 0 0 4px;
}
.featured-card:hover {
  box-shadow: var(--card-shadow-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
}
.featured-cats { margin-bottom: 0.75rem; }
.featured-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
  margin-bottom: 0.75rem;
}
.featured-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1rem;
  line-height: 1.7;
}
.featured-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-tertiary);
}

/* --- Content Grid (Posts + Sidebar) --- */
.content-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 2.5rem;
  align-items: start;
}

/* Section Header */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--border-color);
}
.section-title {
  font-size: 1.35rem;
  font-weight: 700;
}
.post-count {
  font-size: 0.85rem;
  color: var(--text-tertiary);
  background: var(--bg-tertiary);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
}

/* --- Post Cards Grid --- */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  transition: all 0.3s;
  overflow: hidden;
}
.card:hover {
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-3px);
  border-color: var(--accent);
}

.card-link {
  display: flex;
  flex-direction: column;
  height: 100%;
  text-decoration: none;
  color: inherit;
}

.card-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-cats { margin-bottom: 0.6rem; display: flex; flex-wrap: wrap; gap: 0.35rem; }
.card-cat {
  display: inline-block;
  background: var(--accent-light);
  color: var(--accent);
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.card-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.45;
  margin-bottom: 0.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card:hover .card-title { color: var(--accent); }

.card-desc {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.65;
  margin-bottom: 0.75rem;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-tertiary);
}
.card-read-more {
  color: var(--accent);
  font-weight: 500;
  font-size: 0.82rem;
  opacity: 0;
  transform: translateX(-8px);
  transition: all 0.3s;
}
.card:hover .card-read-more { opacity: 1; transform: translateX(0); }

.card-featured {
  grid-column: span 2;
}

/* --- Sidebar --- */
.sidebar {
  position: sticky;
  top: 80px;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.sidebar-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.sidebar-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.category-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.category-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.35rem 0;
  font-size: 0.9rem;
}
.cat-name { color: var(--text-secondary); }
.cat-count {
  background: var(--bg-tertiary);
  color: var(--text-tertiary);
  font-size: 0.75rem;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
}

.quick-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.quick-links a {
  font-size: 0.88rem;
  color: var(--text-secondary);
  padding: 0.3rem 0;
  display: block;
  transition: color 0.2s;
}
.quick-links a:hover { color: var(--accent); }

.sidebar-cta p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

/* --- Breadcrumb --- */
.breadcrumb-bar {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 0.6rem 0;
}
.breadcrumb {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  font-size: 0.85rem;
}
.breadcrumb li:not(:last-child)::after {
  content: '/';
  margin-left: 0.35rem;
  color: var(--text-tertiary);
}
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { color: var(--text-tertiary); }

/* --- Article Layout (with TOC sidebar) --- */
.article-layout {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 2.5rem;
  align-items: start;
}

/* --- TOC Sidebar --- */
.toc-sidebar {
  position: sticky;
  top: 80px;
}
.toc-inner {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.toc-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}
.toc-nav ul { list-style: none; }
.toc-item { margin-bottom: 0.15rem; }
.toc-item a {
  display: block;
  padding: 0.3rem 0.6rem;
  font-size: 0.82rem;
  color: var(--text-secondary);
  border-radius: 4px;
  border-left: 2px solid transparent;
  transition: all 0.2s;
  line-height: 1.5;
}
.toc-item a:hover,
.toc-item a.active {
  color: var(--accent);
  background: var(--accent-light);
  border-left-color: var(--accent);
}
.toc-depth-3 { padding-left: 0.75rem; }

/* Mobile TOC */
.toc-mobile {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
  overflow: hidden;
}
.toc-mobile summary {
  padding: 0.75rem 1rem;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  color: var(--text-primary);
}
.toc-mobile ul { list-style: none; padding: 0 1rem 0.75rem; }
.toc-mobile li { margin-bottom: 0.15rem; }
.toc-mobile a {
  display: block;
  padding: 0.3rem 0.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  border-radius: 4px;
}
.toc-mobile a:hover { color: var(--accent); }
.toc-mobile .toc-depth-3 { padding-left: 1rem; }
.toc-mobile a.active { color: var(--accent); background: var(--accent-light); }

/* --- Article --- */
.article {
  max-width: var(--content-w);
  min-width: 0;
}

.article-header {
  margin-bottom: 2rem;
}
.article-cats { margin-bottom: 0.75rem; display: flex; flex-wrap: wrap; gap: 0.4rem; }
.article-title {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-tertiary);
}
.meta-left {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.meta-left span, .meta-left time {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.meta-left svg { opacity: 0.6; flex-shrink: 0; }

/* --- Article Content --- */
.article-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 2rem;
  font-size: 1rem;
  line-height: 1.85;
}

.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border-color);
  color: var(--text-primary);
  scroll-margin-top: 80px;
}
.article-content h2:first-child { margin-top: 0; }

.article-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
  color: var(--text-primary);
  scroll-margin-top: 80px;
}

.article-content h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 1.5rem 0 0.5rem;
}

.article-content p { margin-bottom: 1rem; }

.article-content a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.article-content a:hover { color: var(--accent-hover); }

.article-content img {
  border-radius: var(--radius-sm);
  margin: 1.25rem 0;
  box-shadow: var(--card-shadow);
}

.article-content ul, .article-content ol {
  margin: 1rem 0;
  padding-left: 1.5rem;
}
.article-content li { margin-bottom: 0.4rem; }

.article-content code {
  background: var(--code-bg);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.88em;
  font-family: var(--font-mono);
}

.article-content pre {
  background: #1e293b;
  color: #e2e8f0;
  padding: 1.25rem;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: 1.25rem 0;
  font-size: 0.9rem;
  line-height: 1.6;
}
.article-content pre code {
  background: none;
  padding: 0;
  color: inherit;
}

.article-content blockquote {
  border-left: 4px solid var(--accent);
  padding: 0.75rem 1.25rem;
  margin: 1.25rem 0;
  background: var(--accent-light);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary);
}
.article-content blockquote p:last-child { margin-bottom: 0; }

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.9rem;
}
.article-content th, .article-content td {
  border: 1px solid var(--border-color);
  padding: 0.6rem 0.8rem;
  text-align: left;
}
.article-content th {
  background: var(--bg-tertiary);
  font-weight: 600;
}

.article-content strong { font-weight: 600; }

/* --- Tags --- */
.article-tags {
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.tags-label { font-size: 0.85rem; color: var(--text-tertiary); }
.tag {
  display: inline-block;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.8rem;
  transition: all 0.2s;
}
.tag:hover { background: var(--accent-light); color: var(--accent); }

/* --- Post Navigation --- */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}
.post-nav-item {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all 0.2s;
}
.post-nav-item:hover {
  border-color: var(--accent);
  box-shadow: var(--card-shadow);
}
.post-nav-next { text-align: right; }
.post-nav-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.post-nav-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.post-nav-item:hover .post-nav-title { color: var(--accent); }

/* --- Scroll to Top --- */
.scroll-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--card-shadow);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: all 0.3s;
  z-index: 50;
}
.scroll-top.visible {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}
.scroll-top:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

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

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem 1.5rem 1.5rem;
}

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

.footer-logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}
.footer-logo:hover { color: var(--accent); }
.footer-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
  line-height: 1.6;
}

.footer-links h4 {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 0.35rem; }
.footer-links a {
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--accent); }

.footer-bottom {
  text-align: center;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.82rem;
  color: var(--text-tertiary);
}

/* =============================================
   Responsive
   ============================================= */
@media (max-width: 1024px) {
  .content-grid {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: static;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
  .toc-sidebar { display: none; }
  .toc-mobile { display: block; }
}

@media (max-width: 768px) {
  .menu-toggle { display: flex; }
  .main-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0; right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 0.5rem 1.5rem 1rem;
    gap: 0.25rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  }
  .main-nav.open { display: flex; }
  .nav-link { padding: 0.5rem 0; }

  .hero { padding: 2.5rem 1rem; }
  .hero-title { font-size: 2rem; }
  .hero-sub { font-size: 1rem; }

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

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

  .article-title { font-size: 1.6rem; }
  .article-content { padding: 1.25rem; }
  .article-content h2 { font-size: 1.3rem; }

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

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

@media (max-width: 480px) {
  .hero-title { font-size: 1.75rem; }
  .hero-actions { flex-direction: column; align-items: center; }
  .footer-grid { grid-template-columns: 1fr; }
}

/* Logo image */
.logo-img {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  object-fit: contain;
}