/* AEO Professional Theme — ecommerce */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#FF6B35;--accent:#1A1A2E;--bg:#FFFFFF;--text:#1A1A2E;
  --text-light:#4A4A5A;--text-muted:#8A8A9A;--border:#E8E8EE;
  --card-bg:#FFFFFF;--header-bg:rgba(255,255,255,0.97);
  --hero-bg:#1A1A2E;--hero-text:#FFFFFF;--card-hover:#FFF4EF;
  --cat-bg:#FF6B35;--cat-text:#FFFFFF;
  --heading-font:'Space Grotesk',sans-serif;--body-font:'Inter',sans-serif;
  --content-width:720px;--page-width:1140px;
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--body-font);color:var(--text);background:var(--bg);line-height:1.7;font-size:17px}
img{max-width:100%;height:auto}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--accent)}
h1,h2,h3,h4,h5{font-family:var(--heading-font);line-height:1.25;color:var(--text);font-weight:700}
h1{font-size:2.6rem;letter-spacing:-0.02em}
h2{font-size:1.8rem;letter-spacing:-0.01em}
h3{font-size:1.35rem}
h4{font-size:1.15rem}
.container{max-width:var(--page-width);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);padding:.75rem 0;transition:box-shadow .3s}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1.5rem}
.site-logo{font-family:var(--heading-font);font-size:1.35rem;font-weight:700;color:var(--text);letter-spacing:-0.02em}
.site-logo:hover{color:var(--primary)}
.site-nav{display:flex;gap:.25rem;align-items:center}
.site-nav a{padding:.45rem .85rem;border-radius:6px;font-size:.9rem;font-weight:500;color:var(--text-light);transition:all .2s}
.site-nav a:hover{color:var(--primary);background:var(--card-hover)}
.nav-toggle{display:none}
.nav-toggle-label{display:none;cursor:pointer;padding:.5rem;position:relative;width:28px;height:20px}
.nav-toggle-label span,.nav-toggle-label span::before,.nav-toggle-label span::after{display:block;background:var(--text);height:2px;width:24px;border-radius:2px;position:absolute;transition:all .3s}
.nav-toggle-label span{top:50%;transform:translateY(-50%)}
.nav-toggle-label span::before{content:'';top:-7px}
.nav-toggle-label span::after{content:'';top:7px}
.nav-toggle:checked ~ .nav-toggle-label span{background:transparent}
.nav-toggle:checked ~ .nav-toggle-label span::before{top:0;transform:rotate(45deg)}
.nav-toggle:checked ~ .nav-toggle-label span::after{top:0;transform:rotate(-45deg)}

/* ——— HERO ——— */
.hero{background:var(--hero-bg);color:var(--hero-text);padding:4rem 0 3.5rem;margin-bottom:2.5rem}
.hero-title{font-size:2.8rem;margin-bottom:.75rem;letter-spacing:-0.03em}
.hero-tagline{font-size:1.15rem;opacity:.88;max-width:600px;line-height:1.6}

/* ——— HOME LAYOUT ——— */
.home-layout{display:grid;grid-template-columns:1fr 320px;gap:3rem;align-items:start}
.section-title{font-size:1.1rem;text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);margin-bottom:1.5rem;font-weight:600}

/* ——— ARTICLE CARDS ——— */
.articles-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem}
.card{background:var(--card-bg);border:1px solid var(--border);border-radius:10px;padding:1.75rem;transition:all .25s;display:flex;flex-direction:column}
.card:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.06)}
.card-category{display:inline-block;background:var(--cat-bg);color:var(--cat-text);font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;padding:.25rem .65rem;border-radius:4px;margin-bottom:.85rem;width:fit-content}
.card-title{font-size:1.2rem;margin-bottom:.6rem;line-height:1.35}
.card-title a{color:var(--text)}
.card-title a:hover{color:var(--primary)}
.card-excerpt{color:var(--text-light);font-size:.92rem;line-height:1.6;flex-grow:1;margin-bottom:1rem}
.card-meta{display:flex;justify-content:space-between;align-items:center;font-size:.8rem;color:var(--text-muted);padding-top:.85rem;border-top:1px solid var(--border)}
.card-author-date{display:flex;gap:.5rem;align-items:center;flex-wrap:wrap}
.card-author{font-weight:600;color:var(--text-light)}
.card-reading{font-style:italic}

/* ——— SIDEBAR ——— */
.sidebar{display:flex;flex-direction:column;gap:1.5rem;position:sticky;top:5rem}
.widget{background:var(--card-bg);border:1px solid var(--border);border-radius:10px;padding:1.5rem}
.widget h3{font-size:1rem;text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted);margin-bottom:1rem;font-weight:600;font-family:var(--body-font)}
.widget-author{display:flex;align-items:center;gap:.85rem;margin-bottom:1rem}
.widget-desc{font-size:.9rem;color:var(--text-light);line-height:1.55;margin-bottom:.85rem}
.widget-link{font-size:.88rem;font-weight:600;color:var(--primary)}
.category-list{list-style:none}
.category-list li{padding:.4rem 0;border-bottom:1px solid var(--border)}
.category-list li:last-child{border:0}
.category-list a{display:flex;justify-content:space-between;color:var(--text);font-size:.92rem}
.category-list a:hover{color:var(--primary)}
.count{color:var(--text-muted);font-size:.82rem}
.tag-cloud{display:flex;flex-wrap:wrap;gap:.5rem}
.tag{display:inline-block;padding:.3rem .7rem;border:1px solid var(--border);border-radius:20px;font-size:.8rem;color:var(--text-light);transition:all .2s}
.tag:hover{border-color:var(--primary);color:var(--primary);background:var(--card-hover)}

/* ——— AVATAR ——— */
.avatar-circle{width:40px;height:40px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-family:var(--heading-font);font-weight:700;font-size:1rem;flex-shrink:0}
.avatar-lg{width:56px;height:56px;font-size:1.4rem}

/* ——— LIST PAGE ——— */
.list-header{padding:3rem 0 2rem;border-bottom:2px solid var(--primary);margin-bottom:2rem}
.list-title{font-size:2.2rem;margin-bottom:.35rem}
.list-count{color:var(--text-muted);font-size:.95rem}

/* ——— ARTICLE PAGE ——— */
.article-page{max-width:var(--content-width);margin:0 auto;padding:2rem 1.5rem 4rem}
.breadcrumb{font-size:.82rem;color:var(--text-muted);margin-bottom:2rem;display:flex;flex-wrap:wrap;gap:.35rem}
.breadcrumb a{color:var(--text-muted)}
.breadcrumb a:hover{color:var(--primary)}
.article-header{margin-bottom:2.5rem}
.article-category{display:inline-block;background:var(--cat-bg);color:var(--cat-text);font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;padding:.25rem .65rem;border-radius:4px;margin-bottom:1rem}
.article-header h1{margin-bottom:1.25rem}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:1rem;color:var(--text-light);font-size:.9rem}
.meta-author{display:flex;align-items:center;gap:.65rem}
.meta-author-info{display:flex;flex-direction:column}
.meta-author-info strong{font-size:.95rem;color:var(--text)}
.credentials{font-size:.82rem;color:var(--text-muted)}
.meta-details{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;font-size:.85rem;color:var(--text-muted)}
.meta-sep{opacity:.4}
.meta-updated{color:var(--accent)}

/* ——— ARTICLE BODY ——— */
.article-body{font-size:1.05rem;line-height:1.78}
.article-body h2{margin:2.5rem 0 1rem;padding-bottom:.5rem;border-bottom:2px solid var(--border)}
.article-body h3{margin:2rem 0 .75rem;color:var(--primary)}
.article-body h4{margin:1.5rem 0 .5rem}
.article-body p{margin-bottom:1.25rem}
.article-body ul,.article-body ol{margin:0 0 1.25rem 1.5rem}
.article-body li{margin-bottom:.4rem}
.article-body li::marker{color:var(--primary)}
.article-body blockquote{border-left:4px solid var(--accent);background:var(--card-hover);padding:1rem 1.5rem;margin:1.5rem 0;border-radius:0 8px 8px 0;font-style:italic;color:var(--text-light)}
.article-body table{width:100%;border-collapse:collapse;margin:1.5rem 0;font-size:.92rem}
.article-body th{background:var(--primary);color:#fff;padding:.7rem 1rem;text-align:left;font-weight:600}
.article-body td{padding:.65rem 1rem;border-bottom:1px solid var(--border)}
.article-body tr:nth-child(even) td{background:var(--card-hover)}
.article-body a{color:var(--primary);text-decoration:underline;text-decoration-color:var(--accent);text-underline-offset:2px}
.article-body a:hover{color:var(--accent)}
.article-body strong{color:var(--text);font-weight:700}
.article-body code{background:var(--card-hover);padding:.15rem .4rem;border-radius:4px;font-size:.88em}
.article-body pre{background:var(--card-bg);border:1px solid var(--border);border-radius:8px;padding:1.25rem;overflow-x:auto;margin:1.5rem 0}
.article-body pre code{background:none;padding:0}
.article-body hr{border:0;border-top:2px solid var(--border);margin:2.5rem 0}

/* ——— FAQ ——— */
.faq-section{margin-top:3rem;padding-top:2rem;border-top:2px solid var(--border)}
.faq-section h2{margin-bottom:1.5rem}
.faq-item{border:1px solid var(--border);border-radius:8px;margin-bottom:.75rem;overflow:hidden}
.faq-item summary{padding:1rem 1.25rem;font-weight:600;cursor:pointer;font-size:1rem;color:var(--text);transition:background .2s;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:'+';font-size:1.4rem;color:var(--primary);font-weight:300;transition:transform .2s}
.faq-item[open] summary::after{content:'-'}
.faq-item[open] summary{background:var(--card-hover);border-bottom:1px solid var(--border)}
.faq-item p{padding:1rem 1.25rem;color:var(--text-light);line-height:1.65;font-size:.95rem}

/* ——— AUTHOR BOX ——— */
.author-box{display:flex;align-items:flex-start;gap:1.25rem;padding:2rem;background:var(--card-bg);border:1px solid var(--border);border-radius:10px;margin-top:3rem}
.author-box-info h3{margin-bottom:.35rem;font-size:1.1rem}
.author-box-info p{color:var(--text-light);font-size:.92rem;line-height:1.55}

/* ——— NEWSLETTER CTA ——— */
.newsletter-cta{background:var(--hero-bg);color:var(--hero-text);border-radius:10px;padding:2.5rem;text-align:center;margin-top:2rem}
.newsletter-cta h3{margin-bottom:.5rem;font-size:1.3rem;color:var(--hero-text)}
.newsletter-cta p{opacity:.85;margin-bottom:1.25rem;font-size:.95rem}
.newsletter-form{display:flex;gap:.5rem;max-width:420px;margin:0 auto}
.newsletter-form input{flex:1;padding:.7rem 1rem;border:2px solid rgba(255,255,255,.25);border-radius:6px;background:rgba(255,255,255,.12);color:var(--hero-text);font-size:.92rem;font-family:var(--body-font)}
.newsletter-form input::placeholder{color:rgba(255,255,255,.55)}
.newsletter-form button{padding:.7rem 1.5rem;background:var(--accent);color:var(--cat-text);border:0;border-radius:6px;font-weight:700;font-size:.9rem;cursor:pointer;font-family:var(--body-font);white-space:nowrap}

/* ——— RELATED ——— */
.related-articles{margin-top:3rem;padding-top:2rem;border-top:2px solid var(--border)}
.related-articles h2{margin-bottom:1.25rem}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1rem}
.related-card{display:block;padding:1.25rem;border:1px solid var(--border);border-radius:8px;transition:all .2s}
.related-card:hover{border-color:var(--primary);transform:translateY(-2px)}
.related-card h4{font-size:1rem;margin-bottom:.35rem;color:var(--text);line-height:1.35}
.related-date{font-size:.8rem;color:var(--text-muted)}

/* ——— FOOTER ——— */
.site-footer{border-top:1px solid var(--border);margin-top:4rem;padding:3rem 0 2rem}
.footer-inner{display:flex;flex-direction:column;align-items:center;text-align:center;gap:1rem}
.footer-logo{font-family:var(--heading-font);font-size:1.1rem;font-weight:700;color:var(--text)}
.footer-tagline{font-size:.88rem;color:var(--text-muted);max-width:500px;line-height:1.5}
.footer-nav{display:flex;gap:1.25rem}
.footer-nav a{color:var(--text-light);font-size:.88rem}
.footer-nav a:hover{color:var(--primary)}
.footer-copy{font-size:.78rem;color:var(--text-muted)}

/* ——— RESPONSIVE ——— */
@media(max-width:900px){
  .home-layout{grid-template-columns:1fr;gap:2rem}
  .sidebar{position:static;flex-direction:row;flex-wrap:wrap}
  .sidebar .widget{flex:1 1 280px}
}
@media(max-width:640px){
  .nav-toggle-label{display:block}
  .site-nav{position:absolute;top:100%;left:0;right:0;background:var(--header-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);flex-direction:column;padding:0;max-height:0;overflow:hidden;transition:max-height .35s ease,padding .35s ease;border-bottom:1px solid var(--border)}
  .nav-toggle:checked ~ .site-nav{max-height:400px;padding:1rem 1.5rem}
  .site-nav a{padding:.6rem 0;border-bottom:1px solid var(--border)}
  .site-nav a:last-child{border:0}
  .hero{padding:2.5rem 0 2rem}
  .hero-title{font-size:1.8rem}
  .hero-tagline{font-size:1rem}
  .articles-grid{grid-template-columns:1fr}
  h1{font-size:1.8rem}
  h2{font-size:1.4rem}
  .article-meta{flex-direction:column;align-items:flex-start;gap:.75rem}
  .newsletter-form{flex-direction:column}
  .related-grid{grid-template-columns:1fr}
  .sidebar{flex-direction:column}
  .sidebar .widget{flex:1 1 100%}
}

/* ——— PRINT ——— */
@media print{
  .site-header,.site-footer,.sidebar,.newsletter-cta,.related-articles,.nav-toggle-label{display:none}
  .article-page{max-width:100%;padding:0}
  body{font-size:12pt;line-height:1.5;color:#000;background:#fff}
  a{color:#000;text-decoration:underline}
  .article-body h2{border-color:#000}
}