/* ═══════════════════════════════════════════
   IZRI Guide — Stylesheet
   L'encyclopédie de la comptabilité marocaine
   ═══════════════════════════════════════════ */

:root {
  /* Base palette */
  --bg: #08111e;
  --bg-warm: #0c1525;
  --surface: #111d30;
  --surface-hover: #162540;
  --surface-raised: #1a2a44;
  --border: rgba(255,255,255,0.07);
  --border-strong: rgba(255,255,255,0.12);
  
  /* Text */
  --text: #e8edf5;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  /* Brand */
  --accent: #10b981;
  --accent-hover: #0d9668;
  --accent-glow: rgba(16,185,129,0.15);
  --accent-glow-strong: rgba(16,185,129,0.3);
  --blue: #0ea5e9;
  --blue-glow: rgba(14,165,233,0.15);
  --gradient: linear-gradient(135deg, #0ea5e9 0%, #10b981 100%);
  
  /* Typography */
  --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Spacing */
  --content-max: 1200px;
  --article-max: 720px;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 4px;
  
  /* Transitions */
  --t: 0.25s ease;
  --t-slow: 0.4s ease;
}

/* ── RESET ── */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--blue); text-decoration: none; transition: color var(--t); }
a:hover { color: var(--accent); }
img { max-width: 100%; display: block; }
::selection { background: var(--accent-glow-strong); color: #fff; }

/* ── NAVIGATION ── */
.topnav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(8,17,30,0.92);
  backdrop-filter: blur(16px) saturate(1.5);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
}
.nav-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex; align-items: center;
  justify-content: space-between;
  height: 60px;
}
.nav-logo {
  display: flex; align-items: center; gap: 0.5rem;
  text-decoration: none; color: var(--text);
  font-family: var(--font-display);
}
.logo-mark { font-size: 1.4rem; }
.logo-text { font-weight: 700; font-size: 1.25rem; letter-spacing: -0.02em; }
.logo-dot { color: var(--accent); }
.logo-sub { font-weight: 400; font-size: 0.75rem; color: var(--text-secondary); margin-left: 0.3rem; }
.nav-links { display: flex; align-items: center; gap: 0.25rem; }
.nav-link {
  padding: 0.5rem 0.75rem; color: var(--text-secondary);
  font-family: var(--font-display); font-size: 0.88rem; font-weight: 500;
  border-radius: var(--radius-sm); transition: all var(--t);
}
.nav-link:hover { color: var(--text); background: var(--surface); }
.nav-cta {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.5rem 1rem;
  background: var(--accent); color: #fff;
  font-family: var(--font-display); font-size: 0.85rem; font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--t);
}
.nav-cta:hover { background: var(--accent-hover); color: #fff; transform: translateY(-1px); box-shadow: 0 4px 20px var(--accent-glow-strong); }
.cta-arrow { transition: transform var(--t); }
.nav-cta:hover .cta-arrow { transform: translateX(3px); }

/* ── HERO (Homepage) ── */
.hero {
  padding: 5rem 1.5rem 4rem;
  text-align: center;
  background: radial-gradient(ellipse at 50% 0%, rgba(14,165,233,0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 50% 100%, rgba(16,185,129,0.05) 0%, transparent 50%),
              var(--bg);
  position: relative;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}
.hero-inner { position: relative; z-index: 2; max-width: 680px; margin: 0 auto; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--accent-glow);
  border: 1px solid rgba(16,185,129,0.2);
  border-radius: 100px;
  font-family: var(--font-display); font-size: 0.85rem; font-weight: 500;
  color: var(--accent);
  margin-bottom: 1.5rem;
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800; line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}
.text-gradient {
  background: var(--gradient);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 560px;
  margin: 0 auto;
}

/* ── HOME CONTENT ── */
.home-content {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}
.section-title {
  font-family: var(--font-display);
  font-size: 1.4rem; font-weight: 700;
  margin-bottom: 1.5rem;
  padding-top: 2.5rem;
  letter-spacing: -0.02em;
}

/* Featured card */
.featured-section { padding-top: 0.5rem; }
.featured-card {
  display: block;
  padding: 2rem 2.5rem;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  text-decoration: none;
  position: relative; overflow: hidden;
  transition: all var(--t);
}
.featured-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--gradient);
}
.featured-card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 8px 40px rgba(0,0,0,0.3); }
.featured-label {
  font-family: var(--font-display); font-size: 0.82rem; font-weight: 600;
  color: var(--accent); margin-bottom: 0.75rem;
  text-transform: uppercase; letter-spacing: 0.05em;
}
.featured-title {
  font-family: var(--font-display); font-size: 1.5rem; font-weight: 700;
  color: var(--text); margin-bottom: 0.75rem; line-height: 1.3;
  letter-spacing: -0.01em;
}
.featured-desc { color: var(--text-secondary); font-size: 1rem; line-height: 1.7; margin-bottom: 1rem; }
.featured-meta {
  display: flex; gap: 1.25rem;
  font-family: var(--font-display); font-size: 0.82rem; color: var(--text-muted);
  margin-bottom: 0.75rem;
}
.featured-link { font-family: var(--font-display); font-size: 0.9rem; font-weight: 600; color: var(--accent); }

/* Category grid */
.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1rem; }
.cat-card {
  display: flex; flex-direction: column; gap: 0.4rem;
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  transition: all var(--t);
  border-left: 3px solid var(--cat-color);
}
.cat-card:hover { border-color: var(--cat-color); background: var(--surface-hover); transform: translateY(-2px); }
.cat-icon { font-size: 1.5rem; }
.cat-label { font-family: var(--font-display); font-weight: 700; color: var(--text); font-size: 1.05rem; }
.cat-count { font-family: var(--font-display); font-size: 0.78rem; color: var(--text-muted); }
.cat-desc { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.5; }

/* Article cards */
.articles-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 1.25rem; }
.article-card {
  display: flex; flex-direction: column;
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  transition: all var(--t);
}
.article-card:hover { border-color: rgba(255,255,255,0.15); transform: translateY(-2px); box-shadow: 0 6px 24px rgba(0,0,0,0.25); }
.article-card-meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.75rem; }
.article-card-cat { font-family: var(--font-display); font-size: 0.78rem; font-weight: 600; }
.article-card-time { font-family: var(--font-display); font-size: 0.75rem; color: var(--text-muted); }
.article-card-title {
  font-family: var(--font-display); font-size: 1.1rem; font-weight: 700;
  color: var(--text); line-height: 1.35; margin-bottom: 0.6rem;
  letter-spacing: -0.01em;
}
.article-card-desc { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; flex: 1; margin-bottom: 0.75rem; }
.article-card-link { font-family: var(--font-display); font-size: 0.85rem; font-weight: 600; color: var(--accent); }

/* Home CTA */
.home-cta { padding-top: 3rem; }
.home-cta-inner {
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 3rem 2rem;
  text-align: center;
  position: relative; overflow: hidden;
}
.home-cta-inner::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--gradient);
}
.home-cta-inner h2 { font-family: var(--font-display); font-size: 1.4rem; margin-bottom: 0.75rem; }
.home-cta-inner p { color: var(--text-secondary); max-width: 560px; margin: 0 auto 1.5rem; }
.home-cta-btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.85rem 2rem;
  background: var(--accent); color: #fff;
  font-family: var(--font-display); font-size: 0.95rem; font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--t);
}
.home-cta-btn:hover { background: var(--accent-hover); color: #fff; transform: translateY(-2px); box-shadow: 0 4px 24px var(--accent-glow-strong); }


/* ═══════════════════════════════════════════
   ARTICLE PAGE
   ═══════════════════════════════════════════ */

.article-hero {
  padding: 2rem 1.5rem 2.5rem;
  background: radial-gradient(ellipse at 30% 0%, rgba(14,165,233,0.06) 0%, transparent 50%),
              var(--bg-warm);
  border-bottom: 1px solid var(--border);
}
.article-hero-inner {
  max-width: var(--content-max);
  margin: 0 auto;
}

/* Breadcrumb */
.breadcrumb {
  font-family: var(--font-display);
  font-size: 0.82rem; color: var(--text-muted);
  margin-bottom: 1.25rem;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent); }
.bc-sep { margin: 0 0.4rem; opacity: 0.5; }
.bc-current { color: var(--text-secondary); }

.article-meta-top {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem;
  margin-bottom: 1rem;
}
.article-cat-badge {
  font-family: var(--font-display); font-size: 0.82rem; font-weight: 600;
  color: var(--cat-color);
  padding: 0.25rem 0.7rem;
  background: color-mix(in srgb, var(--cat-color) 12%, transparent);
  border-radius: 100px;
}
.article-reading-time, .article-date {
  font-family: var(--font-display); font-size: 0.82rem; color: var(--text-muted);
}

.article-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800; line-height: 1.15;
  letter-spacing: -0.03em;
  max-width: 800px;
  margin-bottom: 1rem;
}
.article-intro {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 720px;
}

/* Article layout */
.article-layout {
  display: grid;
  grid-template-columns: 260px minmax(0, var(--article-max));
  gap: 3rem;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
  align-items: start;
}

/* Sidebar / TOC */
.article-sidebar {
  position: sticky; top: 80px;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
}
.toc {
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
}
.toc-title {
  font-family: var(--font-display);
  font-size: 0.85rem; font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase; letter-spacing: 0.06em;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}
.toc-list {
  list-style: none;
  font-family: var(--font-display);
  font-size: 0.82rem;
}
.toc-list li { margin-bottom: 0.25rem; }
.toc-list li a {
  display: block;
  padding: 0.35rem 0.6rem;
  color: var(--text-secondary);
  border-radius: var(--radius-xs);
  border-left: 2px solid transparent;
  transition: all var(--t);
  line-height: 1.4;
}
.toc-list li a:hover { color: var(--text); background: var(--surface-hover); }
.toc-list li a.active {
  color: var(--accent); border-left-color: var(--accent);
  background: var(--accent-glow);
}
.toc-list .toc-sub a { padding-left: 1.2rem; font-size: 0.78rem; }

/* Sidebar CTA */
.sidebar-cta {
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative; overflow: hidden;
}
.sidebar-cta::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--gradient);
}
.sidebar-cta-icon { font-size: 1.5rem; margin-bottom: 0.5rem; }
.sidebar-cta h3 { font-family: var(--font-display); font-size: 0.95rem; font-weight: 700; margin-bottom: 0.4rem; }
.sidebar-cta p { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.5; margin-bottom: 0.75rem; }
.sidebar-cta-btn {
  display: block; text-align: center;
  padding: 0.6rem 1rem;
  background: var(--accent); color: #fff;
  font-family: var(--font-display); font-size: 0.82rem; font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--t);
}
.sidebar-cta-btn:hover { background: var(--accent-hover); color: #fff; }

/* ── Article content ── */
.article-content {
  min-width: 0; /* prevent grid blowout */
}
.article-content h2 {
  font-family: var(--font-display);
  font-size: 1.5rem; font-weight: 700;
  margin-top: 2.5rem; margin-bottom: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  letter-spacing: -0.02em;
  line-height: 1.3;
}
.article-content h2:first-child { margin-top: 0; border-top: none; padding-top: 0; }
.article-content h3 {
  font-family: var(--font-display);
  font-size: 1.15rem; font-weight: 700;
  margin-top: 2rem; margin-bottom: 0.75rem;
  color: var(--text);
  letter-spacing: -0.01em;
}
.article-content p {
  margin-bottom: 1.25rem;
  color: var(--text);
  line-height: 1.8;
}
.article-content strong { font-weight: 600; color: #fff; }
.article-content code {
  font-family: var(--font-mono); font-size: 0.88em;
  padding: 0.15em 0.45em;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  color: var(--blue);
}
.article-content ul, .article-content ol {
  margin-bottom: 1.25rem; padding-left: 1.5rem;
}
.article-content li {
  margin-bottom: 0.5rem;
  line-height: 1.75;
  color: var(--text);
}
.article-content li::marker { color: var(--accent); }

/* Tables */
.table-wrap {
  overflow-x: auto;
  margin-bottom: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}
.article-content thead th {
  font-family: var(--font-display);
  font-size: 0.82rem; font-weight: 600;
  text-align: left;
  padding: 0.75rem 1rem;
  background: var(--surface);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border-strong);
  white-space: nowrap;
}
.article-content tbody td {
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}
.article-content tbody tr:last-child td { border-bottom: none; }
.article-content tbody tr:hover { background: var(--surface); }

/* Code blocks */
.code-block {
  margin-bottom: 1.5rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}
.code-block pre {
  padding: 1.25rem;
  background: var(--surface);
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.6;
}
.code-block code {
  font-family: var(--font-mono);
  background: none; border: none; padding: 0;
  color: var(--text);
}

/* FAQ */
.faq-section {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}
.faq-section h2 {
  border-top: none !important; padding-top: 0 !important; margin-top: 0 !important;
}
.faq-item {
  margin-bottom: 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color var(--t);
}
.faq-item[open] { border-color: var(--border-strong); }
.faq-q {
  font-family: var(--font-display);
  font-size: 1rem; font-weight: 600;
  padding: 1rem 1.25rem;
  cursor: pointer;
  list-style: none;
  background: var(--surface);
  color: var(--text);
  display: flex; align-items: center; gap: 0.75rem;
  transition: background var(--t);
}
.faq-q:hover { background: var(--surface-hover); }
.faq-q::before { content: '▸'; color: var(--accent); transition: transform var(--t); }
.faq-item[open] .faq-q::before { transform: rotate(90deg); }
.faq-q::-webkit-details-marker { display: none; }
.faq-a {
  padding: 1rem 1.25rem 1.25rem;
  background: var(--bg-warm);
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

/* In-article CTA */
.article-cta-box {
  margin-top: 2.5rem;
  margin-bottom: 2rem;
}
.cta-box-inner {
  padding: 2rem;
  background: var(--surface);
  border: 1px solid var(--accent-glow-strong);
  border-radius: var(--radius);
  text-align: center;
  position: relative; overflow: hidden;
}
.cta-box-inner::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--gradient);
}
.cta-box-inner h3 { font-family: var(--font-display); font-size: 1.15rem; margin-bottom: 0.6rem; }
.cta-box-inner p { color: var(--text-secondary); font-size: 0.92rem; max-width: 520px; margin: 0 auto 1.25rem; }
.cta-box-btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  background: var(--accent); color: #fff;
  font-family: var(--font-display); font-size: 0.9rem; font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--t);
}
.cta-box-btn:hover { background: var(--accent-hover); color: #fff; transform: translateY(-2px); box-shadow: 0 4px 20px var(--accent-glow-strong); }

/* Related articles */
.related-section { margin-top: 2rem; }
.related-section h2 {
  font-family: var(--font-display); font-size: 1.15rem; font-weight: 700;
  margin-bottom: 1rem; padding-top: 0 !important; border-top: none !important; margin-top: 0 !important;
}
.related-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.related-card {
  display: flex; flex-direction: column; gap: 0.3rem;
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all var(--t);
}
.related-card:hover { border-color: rgba(255,255,255,0.15); transform: translateY(-2px); }
.related-cat { font-family: var(--font-display); font-size: 0.75rem; font-weight: 600; }
.related-title { font-family: var(--font-display); font-size: 0.92rem; font-weight: 600; color: var(--text); line-height: 1.35; }
.related-meta { font-family: var(--font-display); font-size: 0.75rem; color: var(--text-muted); }


/* ═══════════════════════════════════════════
   CATEGORY PAGE
   ═══════════════════════════════════════════ */
.category-hero {
  padding: 2.5rem 1.5rem;
  background: var(--bg-warm);
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.category-hero-inner { max-width: 600px; margin: 0 auto; }
.category-icon { font-size: 2.5rem; margin-bottom: 0.75rem; display: block; }
.category-hero h1 {
  font-family: var(--font-display); font-size: 2rem; font-weight: 800;
  margin-bottom: 0.5rem; color: var(--text);
}
.category-hero p { color: var(--text-secondary); font-size: 1.05rem; margin-bottom: 0.5rem; }
.category-count { font-family: var(--font-display); font-size: 0.82rem; color: var(--text-muted); }
.category-content {
  max-width: 900px; margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}


/* ═══════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════ */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-warm);
  padding: 3rem 0 2rem;
}
.footer-inner { max-width: var(--content-max); margin: 0 auto; padding: 0 1.5rem; }
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 3rem;
  margin-bottom: 2rem;
}
.footer-logo {
  font-family: var(--font-display); font-size: 1.1rem; font-weight: 700;
  color: var(--text); text-decoration: none;
  display: block; margin-bottom: 0.75rem;
}
.footer-desc { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.6; }
.footer-col h4 {
  font-family: var(--font-display); font-size: 0.82rem; font-weight: 700;
  color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em;
  margin-bottom: 0.75rem;
}
.footer-col a {
  display: block; color: var(--text-secondary);
  font-family: var(--font-display); font-size: 0.88rem;
  padding: 0.2rem 0;
}
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  padding-top: 1.5rem; border-top: 1px solid var(--border);
  font-family: var(--font-display); font-size: 0.78rem; color: var(--text-muted);
  text-align: center;
}
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--accent); }


/* ═══════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════ */
@media (max-width: 900px) {
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: relative; top: auto;
    max-height: none;
    display: flex; gap: 1rem; flex-wrap: wrap;
    margin-bottom: 1.5rem;
  }
  .toc { flex: 1; min-width: 250px; }
  .sidebar-cta { flex: 1; min-width: 200px; }
  .related-grid { grid-template-columns: 1fr; }
  .articles-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
}

@media (max-width: 640px) {
  .hero { padding: 3rem 1rem 2.5rem; }
  .hero-title { font-size: 1.8rem; }
  .article-title { font-size: 1.5rem; }
  .article-layout { padding: 1.5rem 1rem; }
  .nav-links { gap: 0; }
  .nav-link { display: none; }
  .cat-grid { grid-template-columns: 1fr 1fr; }
  .featured-card { padding: 1.5rem; }
}

@media (max-width: 400px) {
  body { font-size: 16px; }
  .cat-grid { grid-template-columns: 1fr; }
}