:root{
  --bg:#ffffff;--surface:#f6f7fb;--text:#1b1f2a;--muted:#5b6475;--border:#e3e6ee;
  --brand:#2f5bea;--brand-dark:#1e3fb0;--accent:#10b981;--radius:12px;
  --maxw:1140px;--font:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.7;font-size:17px}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-dark);text-decoration:underline}
.container{max-width:var(--maxw);margin:0 auto;padding:0 16px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.35rem;color:var(--text);letter-spacing:-.02em}
.logo-mark{width:36px;height:36px;flex-shrink:0}
.logo-text span{color:var(--brand)}
.logo-footer{color:#fff;margin-bottom:12px}.logo-footer .logo-text span{color:#6ee7b7}
.logo:hover{text-decoration:none}
.nav-links{display:flex;gap:24px;list-style:none}
.nav-links a{color:var(--text);font-weight:500;font-size:.95rem}
.nav-links a:hover,.nav-links a.active{color:var(--brand);text-decoration:none}
.menu-btn{display:none;background:none;border:0;font-size:1.6rem;cursor:pointer;color:var(--text)}

/* Hero */
.hero{background:linear-gradient(135deg,#eef2ff 0%,#f0fdf4 100%);padding:72px 0 64px;text-align:center}
.hero h1{font-size:clamp(1.9rem,4.5vw,3rem);line-height:1.2;margin-bottom:16px;letter-spacing:-.02em}
.hero p{color:var(--muted);max-width:640px;margin:0 auto 28px;font-size:1.1rem}
.btn{display:inline-block;background:var(--brand);color:#fff;padding:12px 26px;border-radius:999px;font-weight:600}
.btn:hover{background:var(--brand-dark);color:#fff;text-decoration:none}

/* Sections */
section{padding:56px 0}
.section-title{font-size:1.6rem;margin-bottom:8px}
.section-sub{color:var(--muted);margin-bottom:32px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:transform .2s,box-shadow .2s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-3px);box-shadow:0 10px 30px rgba(20,30,60,.08)}
.card-thumb{display:block;aspect-ratio:1200/630;overflow:hidden;background:var(--surface)}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.card:hover .card-thumb img{transform:scale(1.04)}
.card-body{padding:20px;flex:1;display:flex;flex-direction:column}
.tag{display:inline-block;font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--brand);margin-bottom:8px}
.card h3{font-size:1.15rem;line-height:1.4;margin-bottom:8px}
.card h3 a{color:var(--text)}
.card p{color:var(--muted);font-size:.95rem;flex:1}
.meta{font-size:.85rem;color:var(--muted);margin-top:12px}
.cats{display:flex;flex-wrap:wrap;gap:12px}
.cat{background:var(--surface);border:1px solid var(--border);padding:10px 18px;border-radius:999px;font-weight:500;color:var(--text)}

/* Ad slots — shown only as placeholders until AdSense is approved */
.ad-slot{margin:32px auto;text-align:center;min-height:0}

/* Article */
.article-wrap{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;padding:40px 16px 64px}
.article h1{font-size:clamp(1.7rem,4vw,2.4rem);line-height:1.25;margin-bottom:12px;letter-spacing:-.01em}
.article .meta{margin-bottom:28px}
.article h2{font-size:1.45rem;margin:36px 0 12px}
.article h3{font-size:1.15rem;margin:24px 0 8px}
.article p{margin-bottom:18px}
.article ul,.article ol{margin:0 0 18px 24px}
.article li{margin-bottom:8px}
.article .note{background:var(--surface);border-left:4px solid var(--brand);padding:16px 20px;border-radius:0 8px 8px 0;margin:24px 0}
.article table{width:100%;border-collapse:collapse;margin:20px 0;font-size:.95rem}
.article th,.article td{border:1px solid var(--border);padding:10px 12px;text-align:left}
.article th{background:var(--surface)}
.toc{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px 22px;margin-bottom:28px}
.toc strong{display:block;margin-bottom:8px}
.toc ol{margin:0 0 0 20px}
.breadcrumb{font-size:.85rem;color:var(--muted);margin-bottom:16px}
.author-box{display:flex;gap:16px;align-items:center;background:var(--surface);border-radius:var(--radius);padding:20px;margin-top:40px}
.avatar{width:56px;height:56px;border-radius:50%;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.3rem;flex-shrink:0}
.sidebar .widget{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:24px}
.sidebar h4{margin-bottom:12px}
.sidebar ul{list-style:none}
.sidebar li{padding:8px 0;border-bottom:1px solid var(--border);font-size:.95rem}
.sidebar li:last-child{border:0}

/* Pages */
.page{max-width:820px;padding:48px 16px 72px}
.page h1{font-size:2.1rem;margin-bottom:8px}
.page h2{font-size:1.3rem;margin:28px 0 10px}
.page p,.page li{margin-bottom:12px}
.page ul{margin-left:22px}
form{display:grid;gap:14px;margin-top:20px}
input,textarea{width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:8px;font:inherit}
textarea{min-height:150px}
button.btn{border:0;cursor:pointer;justify-self:start}

/* Footer */
.site-footer{background:#111827;color:#cbd5e1;padding:48px 0 24px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px}
.site-footer h4{color:#fff;margin-bottom:12px}
.site-footer ul{list-style:none}
.site-footer li{margin-bottom:8px}
.site-footer a{color:#cbd5e1}
.site-footer a:hover{color:#fff}
.copyright{border-top:1px solid #1f2937;margin-top:32px;padding-top:20px;font-size:.85rem;text-align:center}

/* Cookie banner */
.cookie{position:fixed;bottom:16px;left:16px;right:16px;max-width:520px;background:#111827;color:#fff;padding:16px 20px;border-radius:var(--radius);display:none;gap:12px;align-items:center;z-index:100;font-size:.9rem;box-shadow:0 10px 30px rgba(0,0,0,.2)}
.cookie.show{display:flex}
.cookie a{color:#93c5fd}
.cookie button{background:var(--brand);color:#fff;border:0;padding:8px 16px;border-radius:999px;cursor:pointer;font-weight:600;white-space:nowrap}

@media (max-width:900px){
  .article-wrap{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}
}
@media (max-width:760px){
  .menu-btn{display:block}
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;gap:0;border-bottom:1px solid var(--border)}
  .nav-links.open{display:flex}
  .nav-links li a{display:block;padding:14px 16px;border-top:1px solid var(--border)}
  body{font-size:16px}
}

/* v2 additions */
.skip{position:absolute;left:-9999px}.skip:focus{left:16px;top:8px;z-index:200;background:#fff;padding:8px 12px}
.band{background:var(--surface)}
.page-title{font-size:2rem;margin-bottom:8px}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.featured{display:grid;grid-template-columns:1.2fr 1fr;gap:32px;align-items:center;background:var(--surface);border:1px solid var(--border);border-radius:16px;overflow:hidden;color:var(--text)}
.featured:hover{text-decoration:none;box-shadow:0 10px 30px rgba(20,30,60,.08)}
.featured img{width:100%;height:100%;object-fit:cover;aspect-ratio:1200/630}
.featured div{padding:28px 28px 28px 0}
.featured h2{font-size:1.7rem;line-height:1.25;margin:6px 0 12px}
.featured p{color:var(--muted)}
.topic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px}
.topic{display:flex;flex-direction:column;align-items:center;gap:6px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:22px 12px;color:var(--text);text-align:center;transition:transform .2s}
.topic:hover{transform:translateY(-3px);text-decoration:none}
.topic-icon{width:54px;height:54px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.6rem}
.topic small{color:var(--muted)}
.hero-img{width:100%;height:auto;border-radius:var(--radius);margin-bottom:28px;aspect-ratio:1200/630;object-fit:cover}
.share{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:32px;font-weight:600}
.share a{background:var(--surface);border:1px solid var(--border);padding:6px 14px;border-radius:999px;font-size:.9rem}
.author-box span{color:var(--muted);font-size:.95rem}
.related-title{margin-top:48px}
.related{grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}
.related .card p{display:none}
label{display:grid;gap:6px;font-weight:600;font-size:.95rem}
.small{margin-top:20px;color:var(--muted);font-size:.9rem}
.article code,.page code{background:var(--surface);border:1px solid var(--border);padding:1px 6px;border-radius:5px;font-size:.9em;word-break:break-word}
.article table{display:block;overflow-x:auto}
@media (max-width:760px){.featured{grid-template-columns:1fr;gap:0}.featured div{padding:20px}.featured h2{font-size:1.35rem}}