:root{
  --bg:#f8fafc; --panel:#ffffff; --ink:#0f172a; --muted:#64748b;
  --brand:#4f46e5; --brand-dark:#3730a3; --line:#e2e8f0; --soft:#eef2ff;
  --radius:14px; --maxw:1080px;
  --font:'Segoe UI',system-ui,-apple-system,Roboto,'Helvetica Neue',Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--ink);line-height:1.7;font-size:16.5px}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* header */
header.site{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:20px;padding:14px 0;flex-wrap:wrap}
.logo{font-size:1.35rem;font-weight:800;color:var(--ink);display:flex;align-items:center;gap:8px}
.logo .mark{background:linear-gradient(135deg,#4f46e5,#8b5cf6);color:#fff;width:34px;height:34px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;font-size:1.05rem}
.logo span b{color:var(--brand)}
nav.cats{display:flex;gap:4px;flex-wrap:wrap;margin-left:auto}
nav.cats a{padding:7px 13px;border-radius:999px;font-size:.92rem;color:#334155;font-weight:600}
nav.cats a:hover{background:var(--soft);text-decoration:none;color:var(--brand)}
nav.cats a.active{background:var(--brand);color:#fff}

/* hero */
.hero{background:linear-gradient(135deg,#1e1b4b 0%,#312e81 45%,#4338ca 100%);color:#fff;padding:72px 0 84px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 85% 20%,rgba(167,139,250,.35),transparent)}
.hero .wrap{position:relative;z-index:1}
.hero h1{font-size:clamp(2rem,4.5vw,3.1rem);line-height:1.15;max-width:760px;margin-bottom:16px}
.hero p{color:#c7d2fe;font-size:1.12rem;max-width:640px;margin-bottom:28px}
.hero .stats{display:flex;gap:28px;flex-wrap:wrap;color:#c7d2fe;font-size:.95rem}
.hero .stats b{display:block;font-size:1.5rem;color:#fff}

/* search */
.searchbar{max-width:620px;margin:-40px auto 0;position:relative;z-index:2}
.searchbar input{width:100%;padding:16px 20px;border-radius:14px;border:1px solid var(--line);box-shadow:0 12px 30px rgba(30,27,75,.18);font-size:1rem;font-family:var(--font)}
.searchbar input:focus{outline:2px solid var(--brand)}

/* category cards — flex so the last row centers (5 cards = 3 + 2 centered) */
.cats-grid{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;margin:44px 0}
.cat-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.18s;display:block;color:var(--ink);border-top:4px solid var(--accent,#4f46e5);flex:1 1 300px;max-width:352px}
.cat-card:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(15,23,42,.10);text-decoration:none}
.cat-card .icon{font-size:2rem}
.cat-card h3{margin:10px 0 4px;font-size:1.25rem}
.cat-card .tag{color:var(--accent,#4f46e5);font-size:.88rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em}
.cat-card p{color:var(--muted);font-size:.95rem;margin-top:8px}
.cat-card .count{margin-top:14px;font-size:.88rem;font-weight:700;color:var(--accent,#4f46e5)}

section.block{padding:40px 0}
h2.section-title{font-size:1.6rem;margin-bottom:6px}
p.section-sub{color:var(--muted);margin-bottom:24px}

/* article list */
.article-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:18px}
.a-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px;display:flex;flex-direction:column;gap:10px}
.a-card h3{font-size:1.06rem;line-height:1.45}
.a-card h3 a{color:var(--ink)}
.a-card p{color:var(--muted);font-size:.92rem;flex:1}
.a-card .meta{font-size:.82rem;color:var(--muted);display:flex;justify-content:space-between;align-items:center}
.badge{display:inline-block;background:var(--soft);color:var(--brand);font-size:.74rem;font-weight:700;padding:3px 10px;border-radius:999px;text-transform:uppercase;letter-spacing:.05em}

/* article page */
.crumbs{font-size:.88rem;color:var(--muted);padding:18px 0 0}
article.post{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:44px;max-width:860px;margin:20px auto 40px}
article.post h1{font-size:clamp(1.7rem,3.2vw,2.3rem);line-height:1.25;margin:6px 0 10px}
.post-meta{display:flex;gap:14px;flex-wrap:wrap;color:var(--muted);font-size:.9rem;margin-bottom:26px;align-items:center}
.takeaways{background:linear-gradient(135deg,#eef2ff,#f5f3ff);border:1px solid #c7d2fe;border-radius:12px;padding:22px 24px;margin:24px 0}
.takeaways h2{font-size:1.05rem;margin-bottom:10px;color:var(--brand-dark)}
.takeaways ul{list-style:none}
.takeaways li{padding:7px 0 7px 30px;position:relative;font-size:.98rem}
.takeaways li::before{content:"✓";position:absolute;left:2px;top:7px;width:20px;height:20px;background:var(--brand);color:#fff;border-radius:50%;font-size:.72rem;display:flex;align-items:center;justify-content:center}
article.post h2{font-size:1.4rem;margin:34px 0 12px;padding-top:8px}
article.post p{margin:0 0 16px;color:#1e293b}
.faq-item{border:1px solid var(--line);border-radius:10px;padding:16px 20px;margin-bottom:12px;background:#fbfcfe}
.faq-item h3{font-size:1.02rem;margin-bottom:6px}
.faq-item p{color:#334155;font-size:.97rem;margin:0}
.notice{background:#fffbeb;border:1px solid #fde68a;border-radius:10px;padding:14px 18px;font-size:.9rem;color:#92400e;margin:30px 0 0}
.next-steps{background:var(--soft);border-radius:12px;padding:22px 24px;margin-top:30px}
.next-steps h2{font-size:1.1rem;margin:0 0 10px}

/* related */
.related{max-width:860px;margin:0 auto 60px}
.related h2{font-size:1.3rem;margin-bottom:18px}

/* footer */
footer.site{background:#0f172a;color:#94a3b8;padding:48px 0 30px;margin-top:40px}
footer.site a{color:#c7d2fe}
.f-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px;margin-bottom:28px}
.f-grid h4{color:#fff;margin-bottom:12px;font-size:1rem}
.f-grid ul{list-style:none}
.f-grid li{margin-bottom:8px;font-size:.92rem}
.f-bottom{border-top:1px solid #1e293b;padding-top:20px;font-size:.85rem;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

/* search results */
.results{max-width:860px;margin:30px auto 60px}
.result-item{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:20px 24px;margin-bottom:14px}
.result-item h3{font-size:1.08rem;margin-bottom:6px}
.result-item p{color:var(--muted);font-size:.93rem}

@media (max-width:760px){
  article.post{padding:26px 20px}
  .f-grid{grid-template-columns:1fr}
  nav.cats{margin-left:0;width:100%}
}