@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Poppins:wght@700;800;900&display=swap');

:root {
  --primary: #1E3A5F;
  --primary-dark: #152a47;
  --secondary: #2E75B6;
  --accent: #F59E0B;
  --accent-hover: #D97706;
  --text: #1F2937;
  --text-light: #6B7280;
  --text-lighter: #9CA3AF;
  --bg: #F8FAFC;
  --white: #FFFFFF;
  --border: #E5E7EB;
  --success: #10B981;
  --danger: #EF4444;
  --card-shadow: 0 1px 3px rgba(0,0,0,.07), 0 4px 16px rgba(0,0,0,.05);
  --card-shadow-hover: 0 8px 24px rgba(0,0,0,.12), 0 2px 8px rgba(0,0,0,.08);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --nav-height: 68px;
  --max-width: 1200px;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --font-h: 'Poppins', 'Inter', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); color: var(--text); background: var(--bg); line-height: 1.7; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: var(--secondary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--primary); }
ul { list-style: none; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* ── NAV ── */
.site-header { position: sticky; top: 0; z-index: 100; background: var(--white); border-bottom: 1px solid var(--border); box-shadow: 0 2px 12px rgba(0,0,0,.06); }
.navbar { display: flex; align-items: center; gap: 24px; height: var(--nav-height); }
.nav-logo { display: flex; align-items: center; gap: 10px; font-family: var(--font-h); font-weight: 900; font-size: 1.35rem; color: var(--primary); white-space: nowrap; text-decoration: none; }
.nav-logo .accent { color: var(--accent); }
.nav-logo .logo-icon { width: 36px; height: 36px; background: linear-gradient(135deg, var(--primary), var(--secondary)); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; font-size: 1.1rem; }
.nav-menu { display: flex; align-items: center; gap: 2px; flex: 1; }
.nav-menu a { padding: 8px 13px; border-radius: var(--radius-sm); font-size: .875rem; font-weight: 500; color: var(--text); white-space: nowrap; transition: all .2s; }
.nav-menu a:hover, .nav-menu a.active { background: rgba(46,117,182,.1); color: var(--secondary); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.nav-cta { background: var(--accent); color: var(--primary) !important; font-weight: 700 !important; padding: 9px 20px !important; border-radius: 50px !important; font-size: .85rem !important; }
.nav-cta:hover { background: var(--accent-hover) !important; }
.hamburger { display: none; cursor: pointer; border: none; background: none; padding: 6px; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text); margin: 5px 0; border-radius: 2px; transition: all .3s; }

/* ── HERO ── */
.hero { background: linear-gradient(135deg, var(--primary) 0%, #1a5a9e 50%, var(--secondary) 100%); color: var(--white); padding: 80px 0 72px; position: relative; overflow: hidden; }
.hero::before { content:''; position:absolute; inset:0; background: radial-gradient(ellipse at 70% 50%, rgba(245,158,11,.12) 0%, transparent 60%); }
.hero .container { position: relative; z-index: 1; }
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(245,158,11,.2); border: 1px solid rgba(245,158,11,.4); color: var(--accent); padding: 6px 16px; border-radius: 50px; font-size: .78rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 20px; }
.hero h1 { font-family: var(--font-h); font-size: clamp(2rem, 4vw, 3rem); font-weight: 900; line-height: 1.15; margin-bottom: 18px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero-sub { font-size: 1.05rem; opacity: .85; line-height: 1.75; margin-bottom: 32px; max-width: 480px; }
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 13px 26px; border-radius: 50px; font-weight: 700; font-size: .9rem; font-family: var(--font); transition: all .2s; cursor: pointer; border: none; text-decoration: none; }
.btn-primary { background: var(--accent); color: var(--primary); }
.btn-primary:hover { background: var(--accent-hover); color: var(--primary); transform: translateY(-2px); }
.btn-ghost { background: rgba(255,255,255,.15); color: var(--white); border: 1px solid rgba(255,255,255,.3); }
.btn-ghost:hover { background: rgba(255,255,255,.25); color: var(--white); }
.hero-visual { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.hero-stat-card { background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.15); border-radius: var(--radius); padding: 20px; backdrop-filter: blur(8px); }
.hero-stat-card:first-child { grid-column: 1 / -1; }
.stat-number { font-family: var(--font-h); font-size: 2rem; font-weight: 900; color: var(--accent); }
.stat-label { font-size: .82rem; opacity: .75; margin-top: 4px; }

/* ── AD ── */
.ad-wrapper { margin: 32px 0; }
.ad-label { font-size: .68rem; color: var(--text-lighter); text-transform: uppercase; letter-spacing: .1em; text-align: center; margin-bottom: 4px; }
.ad-placeholder { background: #FFFBEB; border: 1px dashed rgba(245,158,11,.5); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 4px; color: var(--text-lighter); font-size: .78rem; }
.ad-banner { min-height: 90px; }
.ad-rect { min-height: 280px; }
.ad-sidebar-rect { min-height: 250px; }

/* ── SECTIONS ── */
.section { padding: 72px 0; }
.section-alt { background: var(--white); }
.section-header { text-align: center; margin-bottom: 48px; }
.section-label { font-size: .78rem; font-weight: 700; text-transform: uppercase; letter-spacing: .1em; color: var(--secondary); margin-bottom: 10px; }
.section-title { font-family: var(--font-h); font-size: clamp(1.6rem, 3vw, 2.1rem); font-weight: 800; color: var(--primary); margin-bottom: 12px; line-height: 1.25; }
.section-desc { color: var(--text-light); max-width: 540px; margin: 0 auto; }

/* ── CATEGORY CARDS ── */
.categories-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.cat-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 22px; transition: all .25s; display: block; color: inherit; text-decoration: none; position: relative; overflow: hidden; }
.cat-card::before { content:''; position:absolute; top:0; left:0; right:0; height:3px; background: linear-gradient(90deg, var(--primary), var(--secondary)); transform: scaleX(0); transition: transform .25s; transform-origin: left; }
.cat-card:hover { transform: translateY(-4px); box-shadow: var(--card-shadow-hover); color: inherit; }
.cat-card:hover::before { transform: scaleX(1); }
.cat-icon { font-size: 2.4rem; margin-bottom: 16px; }
.cat-name { font-family: var(--font-h); font-size: 1rem; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.cat-desc { font-size: .84rem; color: var(--text-light); line-height: 1.55; margin-bottom: 14px; }
.cat-meta { display: flex; justify-content: space-between; align-items: center; font-size: .78rem; }
.cat-count { font-weight: 600; color: var(--secondary); }
.cat-rpm { font-weight: 700; color: var(--success); }

/* ── ARTICLE CARDS ── */
.articles-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.articles-grid.col2 { grid-template-columns: repeat(2, 1fr); }
.article-card { background: var(--white); border-radius: var(--radius); border: 1px solid var(--border); overflow: hidden; transition: all .25s; display: flex; flex-direction: column; }
.article-card:hover { transform: translateY(-4px); box-shadow: var(--card-shadow-hover); }
.card-thumb { height: 160px; display: flex; align-items: center; justify-content: center; font-size: 3rem; position: relative; }
.card-thumb.ai    { background: linear-gradient(135deg, #1E3A5F, #2E75B6); }
.card-thumb.diseno { background: linear-gradient(135deg, #6D28D9, #A78BFA); }
.card-thumb.mkt   { background: linear-gradient(135deg, #065F46, #10B981); }
.card-thumb.biz   { background: linear-gradient(135deg, #92400E, #F59E0B); }
.card-thumb.sec   { background: linear-gradient(135deg, #1F2937, #4B5563); }
.card-thumb.free  { background: linear-gradient(135deg, #0369A1, #38BDF8); }
.card-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.card-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 10px; }
.tag { font-size: .68rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; padding: 3px 9px; border-radius: 50px; }
.tag-blue { background: rgba(46,117,182,.1); color: var(--secondary); }
.tag-green { background: rgba(16,185,129,.1); color: #059669; }
.tag-amber { background: rgba(245,158,11,.12); color: #92400E; }
.tag-red   { background: rgba(239,68,68,.1); color: #DC2626; }
.card-title { font-family: var(--font-h); font-size: 1rem; font-weight: 700; color: var(--primary); margin-bottom: 8px; line-height: 1.4; flex: 1; }
.card-title a { color: inherit; }
.card-title a:hover { color: var(--secondary); }
.card-excerpt { font-size: .84rem; color: var(--text-light); line-height: 1.6; margin-bottom: 14px; }
.card-footer { display: flex; justify-content: space-between; align-items: center; padding-top: 12px; border-top: 1px solid var(--border); font-size: .75rem; color: var(--text-lighter); }
.card-rpm-badge { font-weight: 700; color: var(--success); font-size: .78rem; }
.read-more { font-size: .84rem; font-weight: 600; color: var(--secondary); display: inline-flex; align-items: center; gap: 4px; margin-top: 10px; }
.read-more:hover { gap: 8px; color: var(--primary); }

/* ── ARTICLE PAGE ── */
.article-hero { background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%); padding: 48px 0 56px; color: var(--white); }
.breadcrumbs { font-size: .82rem; margin-bottom: 18px; opacity: .75; }
.breadcrumbs a { color: rgba(255,255,255,.85); }
.breadcrumbs a:hover { color: var(--accent); }
.breadcrumbs .sep { margin: 0 8px; opacity: .4; }
.article-hero h1 { font-family: var(--font-h); font-size: clamp(1.5rem, 3.5vw, 2.3rem); font-weight: 800; line-height: 1.25; margin-bottom: 18px; }
.article-meta { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; font-size: .82rem; opacity: .8; }
.article-meta .sep { opacity: .4; }
.article-layout { display: grid; grid-template-columns: 1fr 300px; gap: 48px; padding: 48px 0 72px; align-items: start; }
.article-main { min-width: 0; }
.article-sidebar { display: flex; flex-direction: column; gap: 24px; position: sticky; top: calc(var(--nav-height) + 20px); }
.toc-box { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.toc-title { font-size: .82rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--primary); margin-bottom: 14px; display: flex; align-items: center; gap: 8px; }
.toc-list { display: flex; flex-direction: column; gap: 2px; }
.toc-list a { font-size: .8rem; color: var(--text-light); padding: 5px 0 5px 12px; border-left: 2px solid transparent; display: block; transition: all .2s; line-height: 1.4; }
.toc-list a:hover, .toc-list a.active { color: var(--secondary); border-color: var(--secondary); }
.toc-h3 { padding-left: 24px !important; }

/* ── ARTICLE BODY ── */
.article-body { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 40px; }
.article-body h2 { font-family: var(--font-h); font-size: 1.4rem; font-weight: 700; color: var(--primary); margin: 40px 0 14px; padding-bottom: 10px; border-bottom: 2px solid var(--border); scroll-margin-top: 90px; }
.article-body h3 { font-family: var(--font-h); font-size: 1.1rem; font-weight: 700; color: var(--primary); margin: 28px 0 10px; scroll-margin-top: 90px; }
.article-body p { margin-bottom: 16px; line-height: 1.8; }
.article-body ul, .article-body ol { margin: 0 0 18px 22px; }
.article-body li { margin-bottom: 7px; line-height: 1.7; }
.article-body strong { color: var(--primary); }
.article-body table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: .875rem; }
.article-body th { background: var(--primary); color: var(--white); padding: 11px 14px; text-align: left; font-weight: 600; font-size: .82rem; }
.article-body td { padding: 10px 14px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.article-body tr:nth-child(even) td { background: var(--bg); }
.article-body tr:hover td { background: rgba(46,117,182,.04); }

.intro-box { background: linear-gradient(135deg, rgba(30,58,95,.04), rgba(46,117,182,.06)); border-left: 4px solid var(--secondary); border-radius: 0 var(--radius) var(--radius) 0; padding: 20px 24px; margin-bottom: 30px; }
.intro-box p { margin: 0; font-size: 1.05rem; line-height: 1.8; }

.highlight { background: rgba(245,158,11,.08); border: 1px solid rgba(245,158,11,.25); border-radius: var(--radius); padding: 18px 22px; margin: 22px 0; }
.highlight p { margin: 0; }

.verdict { background: linear-gradient(135deg, var(--primary), var(--secondary)); color: var(--white); border-radius: var(--radius-lg); padding: 28px 32px; margin: 32px 0; }
.verdict h3 { font-family: var(--font-h); font-size: 1.1rem; color: var(--white); margin: 0 0 10px; display: flex; align-items: center; gap: 8px; }
.verdict p { margin: 0; opacity: .9; }

/* ── TOOL CARD ── */
.tool-card { border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; margin: 22px 0; background: var(--white); }
.tool-header { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 14px; }
.tool-icon-box { width: 50px; height: 50px; border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; font-size: 1.4rem; flex-shrink: 0; }
.tool-icon-box.ai   { background: linear-gradient(135deg, #1E3A5F, #2E75B6); }
.tool-icon-box.vpn  { background: linear-gradient(135deg, #1F2937, #4B5563); }
.tool-icon-box.crm  { background: linear-gradient(135deg, #92400E, #F59E0B); }
.tool-icon-box.bill { background: linear-gradient(135deg, #065F46, #10B981); }
.tool-icon-box.des  { background: linear-gradient(135deg, #6D28D9, #A78BFA); }
.tool-name { font-family: var(--font-h); font-size: 1.1rem; font-weight: 700; color: var(--primary); }
.tool-tagline { font-size: .84rem; color: var(--text-light); margin-top: 2px; }
.tool-rating { display: flex; gap: 2px; margin-top: 4px; color: var(--accent); font-size: .9rem; }
.tool-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 14px; }
.pros-box, .cons-box { border-radius: var(--radius-sm); padding: 12px 14px; }
.pros-box { background: rgba(16,185,129,.06); }
.cons-box { background: rgba(239,68,68,.06); }
.pc-title { font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; margin-bottom: 8px; }
.pros-box .pc-title { color: #059669; }
.cons-box .pc-title { color: #DC2626; }
.pros-box ul, .cons-box ul { padding-left: 16px; list-style: disc; }
.pros-box li, .cons-box li { font-size: .82rem; margin-bottom: 4px; }
.tool-price { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--border); font-size: .875rem; }
.price-free { color: var(--success); font-weight: 700; }
.price-paid { color: var(--primary); font-weight: 600; }
.check { color: var(--success); font-weight: 700; }
.cross { color: var(--danger); }
.badge-best { background: var(--accent); color: var(--primary); font-size: .68rem; font-weight: 700; padding: 2px 8px; border-radius: 50px; text-transform: uppercase; }
.badge-free { background: rgba(16,185,129,.15); color: #059669; font-size: .68rem; font-weight: 700; padding: 2px 8px; border-radius: 50px; }

/* ── FAQ ── */
.faq-item { border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 10px; overflow: hidden; }
.faq-q { width: 100%; text-align: left; padding: 16px 20px; background: var(--white); border: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; font-family: var(--font); font-size: .95rem; font-weight: 600; color: var(--primary); transition: background .2s; gap: 12px; }
.faq-q:hover { background: var(--bg); }
.faq-icon { font-size: 1.4rem; line-height: 1; transition: transform .25s; flex-shrink: 0; }
.faq-q[aria-expanded="true"] .faq-icon { transform: rotate(45deg); }
.faq-a { padding: 0 20px; max-height: 0; overflow: hidden; transition: max-height .3s ease, padding .3s; }
.faq-a.open { max-height: 400px; padding: 2px 20px 18px; }
.faq-a p { font-size: .9rem; color: var(--text); margin: 0; }

/* ── RELATED ── */
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 20px; }
.related-card { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; transition: all .2s; display: block; color: inherit; }
.related-card:hover { border-color: var(--secondary); background: var(--white); color: inherit; transform: translateY(-2px); }
.related-cat { font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--secondary); margin-bottom: 6px; }
.related-title { font-family: var(--font-h); font-size: .9rem; font-weight: 700; color: var(--primary); line-height: 1.4; }

/* ── AUTHOR ── */
.author-box { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; margin-top: 32px; display: flex; gap: 18px; align-items: flex-start; }
.author-avatar { width: 56px; height: 56px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), var(--secondary)); display: flex; align-items: center; justify-content: center; font-size: 1.4rem; flex-shrink: 0; }
.author-name { font-family: var(--font-h); font-weight: 700; color: var(--primary); font-size: .95rem; margin-bottom: 3px; }
.author-bio { font-size: .82rem; color: var(--text-light); }

/* ── CATEGORY PAGE ── */
.cat-page-hero { background: linear-gradient(135deg, var(--primary), var(--secondary)); padding: 40px 0 48px; color: var(--white); }
.cat-page-hero h1 { font-family: var(--font-h); font-size: 2rem; font-weight: 800; margin-bottom: 10px; }
.cat-page-hero p { opacity: .85; max-width: 560px; }
.featured-article { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; display: grid; grid-template-columns: 1fr 1fr; margin-bottom: 48px; }
.feat-img { display: flex; align-items: center; justify-content: center; font-size: 5rem; min-height: 260px; }
.feat-content { padding: 36px; }
.feat-label { font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .1em; color: var(--secondary); margin-bottom: 10px; }
.feat-title { font-family: var(--font-h); font-size: 1.5rem; font-weight: 800; color: var(--primary); margin-bottom: 12px; line-height: 1.3; }
.feat-title a { color: inherit; }
.feat-title a:hover { color: var(--secondary); }
.feat-excerpt { color: var(--text-light); line-height: 1.7; margin-bottom: 22px; font-size: .9rem; }
.btn-secondary { background: var(--secondary); color: var(--white); }
.btn-secondary:hover { background: var(--primary); color: var(--white); }

/* ── NEWSLETTER ── */
.newsletter { background: linear-gradient(135deg, var(--primary), var(--secondary)); padding: 64px 0; }
.newsletter-inner { text-align: center; max-width: 520px; margin: 0 auto; color: var(--white); }
.newsletter h2 { font-family: var(--font-h); font-size: 1.9rem; font-weight: 800; margin-bottom: 10px; }
.newsletter p { opacity: .82; margin-bottom: 26px; }
.newsletter-form { display: flex; gap: 10px; }
.newsletter-form input { flex: 1; padding: 13px 18px; border: none; border-radius: var(--radius-sm); font-size: .9rem; font-family: var(--font); outline: none; }
.newsletter-form button { padding: 13px 24px; background: var(--accent); color: var(--primary); border: none; border-radius: var(--radius-sm); font-weight: 700; cursor: pointer; font-family: var(--font-h); white-space: nowrap; transition: background .2s; }
.newsletter-form button:hover { background: var(--accent-hover); }

/* ── FOOTER ── */
.site-footer { background: var(--primary-dark, #0f2033); color: rgba(255,255,255,.7); padding: 56px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 44px; }
.footer-logo { font-family: var(--font-h); font-size: 1.3rem; font-weight: 900; color: var(--white); display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.footer-logo .accent { color: var(--accent); }
.footer-brand p { font-size: .85rem; line-height: 1.7; max-width: 240px; }
.footer-col h4 { font-family: var(--font-h); font-size: .8rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--white); margin-bottom: 16px; }
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col a { font-size: .85rem; color: rgba(255,255,255,.6); transition: color .2s; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.1); font-size: .78rem; gap: 16px; }
.footer-links { display: flex; gap: 18px; }
.footer-links a { color: rgba(255,255,255,.45); font-size: .78rem; }
.footer-links a:hover { color: var(--accent); }

/* ── BACK TO TOP ── */
#btt { position: fixed; bottom: 24px; right: 24px; width: 42px; height: 42px; border-radius: 50%; background: var(--secondary); color: var(--white); border: none; cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 1.1rem; opacity: 0; transform: translateY(20px); transition: all .3s; z-index: 90; box-shadow: 0 4px 12px rgba(0,0,0,.2); }
#btt.show { opacity: 1; transform: translateY(0); }
#btt:hover { background: var(--primary); }

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
  .articles-grid { grid-template-columns: repeat(2, 1fr); }
  .categories-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
}
@media (max-width: 768px) {
  .hamburger { display: block; }
  .nav-menu { display: none; position: absolute; top: var(--nav-height); left: 0; right: 0; background: var(--white); padding: 16px 24px 24px; flex-direction: column; border-bottom: 1px solid var(--border); box-shadow: 0 8px 24px rgba(0,0,0,.1); z-index: 99; gap: 4px; }
  .nav-menu.open { display: flex; }
  .site-header { position: relative; }
  .articles-grid, .articles-grid.col2 { grid-template-columns: 1fr; }
  .categories-grid { grid-template-columns: 1fr; }
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { display: none; }
  .featured-article { grid-template-columns: 1fr; }
  .feat-img { min-height: 180px; }
  .footer-grid { grid-template-columns: 1fr; gap: 20px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .newsletter-form { flex-direction: column; }
  .related-grid { grid-template-columns: 1fr; }
  .tool-grid { grid-template-columns: 1fr; }
  .article-body { padding: 24px; }
}
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero { padding: 48px 0 40px; }
  .section { padding: 48px 0; }
}