/* ============================================================
   USA Content Sites - Production Design System v3
   Dark Mode Toggle + Mobile-First + Performance + SEO 100
   Scalable for 1000+ articles, 1000+ concurrent users
   ============================================================ */

/* Load fonts non-blocking — preconnect in HTML, swap here */
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url('https://fonts.gstatic.com/s/inter/v18/UcCO3FwrK3iLTeHuS_nVMrMxCp50SjIw2boKoduKmMEVuLyfAZ9hiA.woff2') format('woff2');
}
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 600;
    font-display: swap;
    src: url('https://fonts.gstatic.com/s/inter/v18/UcCO3FwrK3iLTeHuS_nVMrMxCp50SjIw2boKoduKmMEVuGKYAZ9hiA.woff2') format('woff2');
}
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 700;
    font-display: swap;
    src: url('https://fonts.gstatic.com/s/inter/v18/UcCO3FwrK3iLTeHuS_nVMrMxCp50SjIw2boKoduKmMEVuFuYAZ9hiA.woff2') format('woff2');
}
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 800;
    font-display: swap;
    src: url('https://fonts.gstatic.com/s/inter/v18/UcCO3FwrK3iLTeHuS_nVMrMxCp50SjIw2boKoduKmMEVuDOYAZ9hiA.woff2') format('woff2');
}
@font-face {
    font-family: 'Merriweather';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url('https://fonts.gstatic.com/s/merriweather/v30/u-440qyriQwlOrhSvowK_l5-fCZM.woff2') format('woff2');
}
@font-face {
    font-family: 'Merriweather';
    font-style: normal;
    font-weight: 700;
    font-display: swap;
    src: url('https://fonts.gstatic.com/s/merriweather/v30/u-4n0qyriQwlOrhSvowK_l52xwNZWMf6.woff2') format('woff2');
}
@font-face {
    font-family: 'Merriweather';
    font-style: italic;
    font-weight: 400;
    font-display: swap;
    src: url('https://fonts.gstatic.com/s/merriweather/v30/u-4l0qyriQwlOrhSvowK_l5-eSZJ.woff2') format('woff2');
}

/* ============================================================
   CSS CUSTOM PROPERTIES - Light Theme (Default)
   ============================================================ */
:root {
    --primary: #2563eb; --primary-dark: #1d4ed8; --primary-light: #dbeafe;
    --accent: #f59e0b; --accent-dark: #d97706;
    --text: #1e293b; --text-light: #64748b; --text-muted: #94a3b8;
    --bg: #ffffff; --bg-light: #f8fafc; --bg-warm: #fffbeb;
    --border: #e2e8f0; --border-light: #f1f5f9;
    --success: #10b981;
    --card-bg: #ffffff; --header-bg: rgba(255,255,255,0.92); --code-bg: #f1f5f9;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07),0 2px 4px -2px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.1),0 8px 10px -6px rgba(0,0,0,0.04);
    --radius: 12px; --radius-lg: 16px; --max-width: 1200px;
    --transition: 0.25s cubic-bezier(.4,0,.2,1);
    --img-brightness: 1;
    --tip-bg: #ecfdf5; --tip-border: #10b981; --tip-text: #065f46;
    --example-bg: #dbeafe; --example-border: #2563eb; --example-text: #1e3a5f;
    --takeaway-bg: #fef3c7; --takeaway-border: #f59e0b; --takeaway-text: #78350f;
    --quote-bg: #fffbeb; --quote-border: #f59e0b; --quote-text: #92400e;
    --table-header-bg: #2563eb; --table-header-text: #fff;
    --table-even: #f8fafc; --table-hover: #dbeafe;
}

/* ============================================================
   DARK THEME (via data-theme attribute)
   ============================================================ */
[data-theme="dark"] {
    --primary: #60a5fa; --primary-dark: #93c5fd; --primary-light: #1e3a5f;
    --text: #e2e8f0; --text-light: #94a3b8; --text-muted: #64748b;
    --bg: #0f172a; --bg-light: #1e293b; --bg-warm: #1c1917;
    --border: #334155; --border-light: #1e293b;
    --card-bg: #1e293b; --header-bg: rgba(15,23,42,0.95); --code-bg: #1e293b;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3); --shadow-md: 0 4px 6px rgba(0,0,0,0.3);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.4);
    --img-brightness: 0.88;
    --tip-bg: #064e3b; --tip-border: #10b981; --tip-text: #6ee7b7;
    --example-bg: #1e3a5f; --example-border: #60a5fa; --example-text: #93c5fd;
    --takeaway-bg: #451a03; --takeaway-border: #f59e0b; --takeaway-text: #fcd34d;
    --quote-bg: #1c1917; --quote-border: #f59e0b; --quote-text: #fbbf24;
    --table-header-bg: #1d4ed8; --table-header-text: #e2e8f0;
    --table-even: rgba(255,255,255,0.03); --table-hover: rgba(255,255,255,0.06);
}
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --primary: #60a5fa; --primary-dark: #93c5fd; --primary-light: #1e3a5f;
        --text: #e2e8f0; --text-light: #94a3b8; --text-muted: #64748b;
        --bg: #0f172a; --bg-light: #1e293b; --bg-warm: #1c1917;
        --border: #334155; --border-light: #1e293b;
        --card-bg: #1e293b; --header-bg: rgba(15,23,42,0.95); --code-bg: #1e293b;
        --shadow-sm: 0 1px 2px rgba(0,0,0,0.3); --shadow-md: 0 4px 6px rgba(0,0,0,0.3);
        --shadow-lg: 0 10px 25px rgba(0,0,0,0.4);
        --img-brightness: 0.88;
        --tip-bg: #064e3b; --tip-border: #10b981; --tip-text: #6ee7b7;
        --example-bg: #1e3a5f; --example-border: #60a5fa; --example-text: #93c5fd;
        --takeaway-bg: #451a03; --takeaway-border: #f59e0b; --takeaway-text: #fcd34d;
        --quote-bg: #1c1917; --quote-border: #f59e0b; --quote-text: #fbbf24;
        --table-header-bg: #1d4ed8; --table-header-text: #e2e8f0;
        --table-even: rgba(255,255,255,0.03); --table-hover: rgba(255,255,255,0.06);
    }
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;color:var(--text);background:var(--bg-light);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;height:auto;display:block;filter:brightness(var(--img-brightness))}
a{color:var(--primary);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--primary-dark)}
.container{max-width:var(--max-width);margin:0 auto;padding:0 20px}
.skip-link{position:absolute;top:-100%;left:16px;z-index:99999;background:var(--primary);color:#fff;padding:10px 20px;border-radius:0 0 8px 8px;font-weight:600;font-size:.9rem}
.skip-link:focus{top:0;color:#fff}

/* ============================================================
   PLATFORM TOP BAR
   ============================================================ */
.platform-bar{background:#0f0f1a;border-bottom:1px solid rgba(99,102,241,0.2);position:sticky;top:0;z-index:9999}
.platform-bar-inner{max-width:1200px;margin:0 auto;padding:7px 16px;display:flex;align-items:center;gap:10px}
.platform-home{color:#a78bfa;text-decoration:none;font-weight:700;font-size:.85rem;white-space:nowrap}
.platform-home:hover{color:#c4b5fd}
.platform-links{display:flex;gap:2px;flex-wrap:wrap;margin-left:auto}
.platform-links a{color:#94a3b8;text-decoration:none;font-size:.75rem;padding:3px 8px;border-radius:100px;transition:all .2s;white-space:nowrap}
.platform-links a:hover{background:rgba(99,102,241,0.15);color:#e2e8f0}
.menu-toggle{display:none;background:none;border:none;color:#94a3b8;font-size:1.3rem;cursor:pointer;padding:4px 8px;line-height:1}
.menu-toggle:hover{color:#e2e8f0}
@media(max-width:640px){
    .platform-links{display:none;position:absolute;top:100%;left:0;right:0;background:#0f0f1a;border-bottom:1px solid rgba(99,102,241,0.2);flex-direction:column;padding:8px 16px;gap:2px;z-index:9998}
    .platform-links.open{display:flex}
    .platform-links a{padding:8px 12px;font-size:.85rem}
    .menu-toggle{display:block;margin-left:auto}
}

/* ============================================================
   DARK MODE TOGGLE
   ============================================================ */
.theme-toggle{background:none;border:1px solid rgba(255,255,255,0.15);color:#94a3b8;cursor:pointer;padding:4px 10px;border-radius:20px;font-size:.82rem;transition:all .2s;display:flex;align-items:center;gap:4px;white-space:nowrap;margin-left:6px}
.theme-toggle:hover{border-color:rgba(255,255,255,0.3);color:#e2e8f0}
.theme-toggle .icon{font-size:1rem;line-height:1}

/* ============================================================
   READING PROGRESS BAR
   ============================================================ */
.reading-progress{position:fixed;top:0;left:0;width:0%;height:3px;background:linear-gradient(90deg,var(--primary),var(--accent));z-index:10000;transition:width .1s linear}

/* ============================================================
   HEADER
   ============================================================ */
.site-header{background:var(--header-bg);border-bottom:1px solid var(--border);padding:14px 0;text-align:center;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.logo{font-size:1.5rem;font-weight:800;color:var(--primary);text-decoration:none;letter-spacing:-0.02em}
a.logo:hover{color:var(--primary-dark)}
.tagline{color:var(--text-light);font-size:.82rem;margin-top:3px}

/* ============================================================
   HERO IMAGE
   ============================================================ */
.hero-image{width:100%;max-height:480px;overflow:hidden;border-radius:0 0 var(--radius-lg) var(--radius-lg);position:relative}
.hero-image img{width:100%;height:100%;object-fit:cover;min-height:240px;max-height:480px}
.hero-image .image-credit{position:absolute;bottom:8px;right:12px;background:rgba(0,0,0,0.55);color:#fff;font-size:.7rem;padding:3px 8px;border-radius:4px;backdrop-filter:blur(4px)}
.hero-image .image-credit a{color:#ddd}
.hero-image .image-credit a:hover{color:#fff}

/* ============================================================
   MAIN LAYOUT
   ============================================================ */
main.container{display:grid;grid-template-columns:1fr 280px;gap:36px;padding-top:28px;padding-bottom:48px}

/* ============================================================
   ARTICLE CONTENT
   ============================================================ */
.article-content{max-width:100%;background:var(--card-bg);border-radius:var(--radius-lg);padding:32px 36px;box-shadow:var(--shadow-sm);border:1px solid var(--border-light)}
.article-header h1{font-family:'Merriweather',Georgia,serif;font-size:1.9rem;line-height:1.35;margin-bottom:14px;color:var(--text);letter-spacing:-0.01em;font-weight:700}
.article-meta{display:flex;align-items:center;gap:12px;color:var(--text-light);font-size:.82rem;margin-bottom:24px;padding-bottom:18px;border-bottom:1px solid var(--border);flex-wrap:wrap}
.article-meta time{display:flex;align-items:center;gap:4px}
.article-meta .read-time,.article-meta .word-count{background:var(--bg-light);padding:3px 10px;border-radius:20px;font-size:.78rem;font-weight:500}
.article-body{font-family:'Merriweather',Georgia,serif;font-size:1.02rem;line-height:1.85;color:var(--text-light)}
.article-body h2{font-family:'Inter',sans-serif;font-size:1.4rem;font-weight:700;margin:36px 0 16px;color:var(--text);padding-bottom:8px;border-bottom:3px solid var(--primary-light);position:relative}
.article-body h2::before{content:'';position:absolute;bottom:-3px;left:0;width:50px;height:3px;background:var(--primary);border-radius:2px}
.article-body h3{font-family:'Inter',sans-serif;font-size:1.15rem;font-weight:600;margin:24px 0 10px;color:var(--text)}
.article-body p{margin-bottom:16px}
.article-body ul,.article-body ol{margin:12px 0 20px 20px;padding-left:8px}
.article-body li{margin-bottom:8px;padding-left:4px}
.article-body li::marker{color:var(--primary);font-weight:600}
.article-body strong{color:var(--text);font-weight:700}
.article-body a{color:var(--primary);text-decoration:underline;text-decoration-color:var(--primary-light);text-underline-offset:3px}
.article-body a:hover{color:var(--primary-dark);text-decoration-color:var(--primary)}
.article-body code{background:var(--code-bg);padding:2px 6px;border-radius:4px;font-size:.88em}
.article-body pre{background:var(--code-bg);padding:16px 20px;border-radius:var(--radius);overflow-x:auto;margin:16px 0;border:1px solid var(--border)}
.article-body pre code{background:none;padding:0}
.article-body .article-image{margin:24px -8px;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-md)}
.article-body .article-image img{width:100%;height:auto;min-height:200px;object-fit:cover;transition:transform .4s ease}
.article-body .article-image:hover img{transform:scale(1.02)}
.article-body .article-image figcaption,.article-body .image-caption{font-family:'Inter',sans-serif;font-size:.78rem;color:var(--text-muted);text-align:center;padding:8px 12px;background:var(--bg-light);font-style:italic}
.article-body blockquote{margin:22px 0;padding:18px 22px;background:var(--quote-bg);border-left:4px solid var(--quote-border);border-radius:0 var(--radius) var(--radius) 0;font-style:italic;color:var(--quote-text)}
.article-body blockquote strong{color:inherit}
.article-body .tip-box,.article-body .example-box,.article-body .key-takeaway{margin:22px 0;padding:18px 22px;border-radius:var(--radius);font-family:'Inter',sans-serif;font-size:.92rem;line-height:1.65}
.article-body .tip-box{background:var(--tip-bg);border-left:4px solid var(--tip-border);color:var(--tip-text)}
.article-body .example-box{background:var(--example-bg);border-left:4px solid var(--example-border);color:var(--example-text)}
.article-body .key-takeaway{background:var(--takeaway-bg);border-left:4px solid var(--takeaway-border);color:var(--takeaway-text)}
.article-body table{width:100%;border-collapse:collapse;margin:18px 0;font-family:'Inter',sans-serif;font-size:.88rem;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm)}
.article-body th{background:var(--table-header-bg);color:var(--table-header-text);padding:10px 14px;text-align:left;font-weight:600}
.article-body td{padding:9px 14px;border-bottom:1px solid var(--border)}
.article-body tr:nth-child(even){background:var(--table-even)}
.article-body tr:hover{background:var(--table-hover)}

/* ============================================================
   ARTICLE CARDS (Index Page)
   ============================================================ */
.articles-list h2{font-family:'Inter',sans-serif;font-size:1.4rem;font-weight:700;margin-bottom:24px;padding-bottom:10px;border-bottom:3px solid var(--primary-light);position:relative}
.articles-list h2::after{content:'';position:absolute;bottom:-3px;left:0;width:50px;height:3px;background:var(--primary);border-radius:2px}
.articles-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}
.article-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;transition:transform var(--transition),box-shadow var(--transition);display:flex;flex-direction:column;contain:layout style}
.article-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.article-card .card-image{width:100%;height:190px;overflow:hidden}
.article-card .card-image img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.article-card:hover .card-image img{transform:scale(1.05)}
.card-body{padding:18px 20px 20px;flex:1;display:flex;flex-direction:column}
.article-card h3{font-family:'Inter',sans-serif;font-size:1.1rem;font-weight:700;margin-bottom:6px;line-height:1.4}
.article-card h3 a{color:var(--text);text-decoration:none}
.article-card h3 a:hover{color:var(--primary)}
.article-card .article-meta{border:none;padding-bottom:0;margin-bottom:8px;font-size:.78rem}
.article-excerpt{color:var(--text-light);margin:6px 0 14px;font-size:.88rem;line-height:1.6;flex:1;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.read-more{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-weight:600;font-size:.88rem}
.read-more::after{content:'\2192'}
.read-more:hover{gap:10px}

/* ============================================================
   SIDEBAR
   ============================================================ */
.sidebar{position:sticky;top:70px;align-self:start}
.sidebar-section{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:16px;box-shadow:var(--shadow-sm)}
.sidebar-section h3{font-size:.95rem;font-weight:700;margin-bottom:10px}
.sidebar-section p{font-size:.88rem;color:var(--text-light);line-height:1.6}
.tag-list{list-style:none;display:flex;flex-wrap:wrap;gap:6px}
.tag{background:var(--primary-light);color:var(--primary);padding:4px 12px;border-radius:20px;font-size:.75rem;font-weight:500;transition:all var(--transition);cursor:default}
.tag:hover{background:var(--primary);color:#fff}

/* ============================================================
   ADS
   ============================================================ */
.ad-container{text-align:center;margin:18px auto;max-width:var(--max-width);padding:0 20px}
.ad-in-article{margin:28px 0;padding:18px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer{background:var(--card-bg);border-top:1px solid var(--border);padding:28px 0;text-align:center;margin-top:40px}
.site-footer p{color:var(--text-light);font-size:.82rem}
.site-footer nav{margin-top:10px;display:flex;justify-content:center;flex-wrap:wrap;gap:4px}
.site-footer nav a{color:var(--text-light);padding:5px 12px;border-radius:20px;font-size:.82rem;font-weight:500;transition:all var(--transition)}
.site-footer nav a:hover{background:var(--primary-light);color:var(--primary)}

/* ============================================================
   SHARE BUTTONS
   ============================================================ */
.share-buttons{margin:28px 0;padding:20px;background:var(--bg-light);border-radius:var(--radius);display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.share-label{font-weight:700;color:var(--text);font-size:.88rem;width:100%;margin-bottom:4px}
.share-btn{display:inline-flex;align-items:center;gap:5px;padding:8px 16px;border-radius:8px;font-size:.8rem;font-weight:600;text-decoration:none;color:white;transition:all var(--transition);box-shadow:var(--shadow-sm)}
.share-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);color:white}
.share-twitter{background:#0f1419}.share-facebook{background:#1877f2}.share-linkedin{background:#0a66c2}.share-reddit{background:#ff4500}.share-whatsapp{background:#25d366}

/* ============================================================
   RELATED ARTICLES
   ============================================================ */
.related-articles{margin-top:36px;padding-top:28px;border-top:2px solid var(--primary-light)}
.related-articles h2{font-family:'Inter',sans-serif;font-size:1.2rem;font-weight:700;margin-bottom:16px;border-bottom:none;padding-bottom:0}
.related-articles h2::before{display:none}
.related-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.related-card{display:block;background:var(--bg-light);border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px;text-decoration:none;transition:all var(--transition)}
.related-card:hover{box-shadow:var(--shadow-md);border-color:var(--primary);transform:translateY(-2px)}
.related-card h3{font-size:.9rem;color:var(--text);margin-bottom:6px;line-height:1.4;font-weight:600}
.related-card .read-time{color:var(--text-muted);font-size:.75rem}

/* ============================================================
   BACK TO TOP
   ============================================================ */
.back-to-top{position:fixed;bottom:20px;right:20px;width:42px;height:42px;background:var(--primary);color:#fff;border:none;border-radius:50%;cursor:pointer;font-size:1.1rem;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transition:all var(--transition);z-index:90}
.back-to-top.visible{opacity:1;visibility:visible}
.back-to-top:hover{background:var(--primary-dark);transform:translateY(-3px)}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media(max-width:768px){
    main.container{grid-template-columns:1fr;padding-top:18px;gap:20px}
    .sidebar{position:static}
    .article-content{padding:22px 18px;border-radius:var(--radius)}
    .article-header h1{font-size:1.45rem}
    .article-body{font-size:.97rem;line-height:1.8}
    .article-body h2{font-size:1.25rem;margin-top:28px}
    .article-body h3{font-size:1.05rem}
    .hero-image{border-radius:0;max-height:280px}
    .hero-image img{min-height:180px;max-height:280px}
    .related-grid{grid-template-columns:1fr}
    .share-buttons{justify-content:center;padding:16px}
    .share-btn{padding:7px 12px;font-size:.78rem}
    .articles-grid{grid-template-columns:1fr;gap:16px}
    .article-card .card-image{height:170px}
}
@media(max-width:480px){
    body{font-size:15px}
    .site-header{padding:12px 0}
    .logo{font-size:1.25rem}
    .tagline{font-size:.75rem}
    .article-content{padding:16px 14px}
    .article-header h1{font-size:1.3rem}
    .article-body{font-size:.93rem}
    .article-body h2{font-size:1.12rem}
    .article-body h3{font-size:1rem}
    .article-body .tip-box,.article-body .example-box,.article-body .key-takeaway{padding:14px 16px;font-size:.85rem}
    .article-body blockquote{padding:14px 16px}
    .share-btn{padding:7px 10px;font-size:.75rem}
    .card-body{padding:14px 16px 16px}
    .article-card h3{font-size:1rem}
    .back-to-top{width:38px;height:38px;bottom:14px;right:14px}
}
@media(max-width:360px){
    .container{padding:0 12px}
    .article-content{padding:14px 12px}
    .article-header h1{font-size:1.15rem}
    .share-btn{padding:6px 8px;font-size:.72rem}
}
@media print{
    .ad-container,.sidebar,.site-header,.site-footer,.platform-bar,.share-buttons,.back-to-top,.reading-progress,.hero-image,.theme-toggle,.menu-toggle{display:none!important}
    body{font-size:11pt;background:#fff;color:#000}
    .article-content{box-shadow:none;border:none;padding:0}
}
@media(prefers-reduced-motion:reduce){
    *,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important}
    html{scroll-behavior:auto}
}

/* ============================================================
   FAQ SECTION (SEO: Google "People Also Ask")
   ============================================================ */
.faq-section{margin:32px 0;padding:24px;background:var(--bg-light);border-radius:var(--radius-lg);border:1px solid var(--border)}
.faq-heading{font-family:'Inter',sans-serif;font-size:1.25rem;font-weight:700;margin-bottom:16px;border-bottom:none;padding-bottom:0;color:var(--text)}
.faq-heading::before{display:none}
.faq-item{border:1px solid var(--border);border-radius:var(--radius);margin-bottom:8px;overflow:hidden;background:var(--card-bg);transition:box-shadow var(--transition)}
.faq-item:hover{box-shadow:var(--shadow-sm)}
.faq-question{display:flex;justify-content:space-between;align-items:center;width:100%;padding:14px 18px;background:none;border:none;cursor:pointer;font-family:'Inter',sans-serif;font-size:.92rem;font-weight:600;color:var(--text);text-align:left;line-height:1.4;gap:12px}
.faq-question:hover{color:var(--primary)}
.faq-icon{font-size:1.2rem;font-weight:700;color:var(--primary);transition:transform .3s ease;flex-shrink:0}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease,padding .35s ease}
.faq-item.open .faq-answer{max-height:500px;padding:0 18px 16px}
.faq-answer p{font-size:.9rem;line-height:1.7;color:var(--text-light);margin:0}

/* ============================================================
   NEWSLETTER SIGNUP
   ============================================================ */
.newsletter-signup{margin:28px 0;padding:28px 24px;background:linear-gradient(135deg,var(--primary-light),var(--bg-warm));border-radius:var(--radius-lg);border:2px solid var(--primary);text-align:center}
.newsletter-signup h3{font-family:'Inter',sans-serif;font-size:1.15rem;font-weight:700;margin-bottom:6px;color:var(--text)}
.newsletter-signup p{font-size:.88rem;color:var(--text-light);margin-bottom:14px}
.newsletter-form{display:flex;gap:8px;max-width:440px;margin:0 auto}
.newsletter-form input[type="email"]{flex:1;padding:10px 16px;border:1px solid var(--border);border-radius:8px;font-size:.9rem;background:var(--card-bg);color:var(--text);outline:none;transition:border-color var(--transition)}
.newsletter-form input[type="email"]:focus{border-color:var(--primary)}
.newsletter-form button{padding:10px 22px;background:var(--primary);color:#fff;border:none;border-radius:8px;font-weight:700;font-size:.88rem;cursor:pointer;transition:all var(--transition);white-space:nowrap}
.newsletter-form button:hover{background:var(--primary-dark);transform:translateY(-1px)}
.newsletter-note{display:block;margin-top:8px;font-size:.75rem;color:var(--text-muted)}
@media(max-width:480px){
    .newsletter-form{flex-direction:column}
    .newsletter-form button{width:100%}
}

/* ============================================================
   LOAD MORE PAGINATION
   ============================================================ */
.articles-count{font-size:.82rem;color:var(--text-muted);margin:-16px 0 18px;font-weight:500}
.load-more-container{text-align:center;padding:32px 0 8px;grid-column:1/-1}
.load-more-btn{display:inline-flex;align-items:center;gap:8px;padding:14px 36px;background:var(--primary);color:#fff;border:none;border-radius:var(--radius);cursor:pointer;font-family:'Inter',sans-serif;font-size:.95rem;font-weight:700;transition:all var(--transition);box-shadow:var(--shadow-md)}
.load-more-btn:hover:not(:disabled){background:var(--primary-dark);transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.load-more-btn:disabled{opacity:.6;cursor:wait}
.load-more-count{font-weight:400;font-size:.82rem;opacity:.85}

/* ============================================================
   PERFORMANCE: CONTAIN & WILL-CHANGE
   ============================================================ */
.article-card{contain:layout style paint}
.site-header{contain:layout style}
.platform-bar{contain:layout style}
.sidebar{contain:layout style}
.article-body img{content-visibility:auto;contain-intrinsic-size:800px 450px}

/* GPU-accelerated transforms for smooth hover */
.article-card,.share-btn,.back-to-top,.load-more-btn{will-change:transform}