:root{
  --ink:#16181b; --ink-2:#2b3036; --muted:#5b636b; --line:#e3e6ea; --bg:#ffffff;
  --soft:#f4f6f8; --accent:#1d4ed8; --accent-dark:#1e3a8a;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;line-height:1.5}
a{color:var(--accent)} a:hover{color:var(--accent-dark)}
img{max-width:100%;height:auto}

.site-header{border-bottom:1px solid var(--line);background:#fff}
.site-header .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px}
.brand{font-weight:800;font-size:21px;color:var(--ink);text-decoration:none;letter-spacing:-0.01em}
.brand span{color:var(--accent)}
.nav{display:flex;flex-wrap:wrap;gap:18px;font-size:15px;font-weight:600}
.nav a{color:var(--ink-2);text-decoration:none}

.wrap{max-width:1200px;margin:0 auto}

/* Ad slots: reserve space to avoid layout shift */
.ad{display:flex;flex-direction:column;align-items:center;margin:0 auto}
.ad-label{font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 4px}
.ad-top{padding:12px 16px 0}
.ad-top .slot{min-height:100px}
@media (min-width:768px){.ad-top .slot{min-height:90px}}
@media (min-width:1024px){.ad-top .slot{min-height:250px}}
.ad-mid .slot{min-height:280px}
.ad-side-top .slot{min-height:600px}
.ad-side-bottom .slot{min-height:250px}
.slot{width:100%;display:flex;justify-content:center}

.layout{display:flex;flex-wrap:wrap;gap:32px;padding:20px 16px 48px;align-items:flex-start}
.article{flex:999 1 560px;min-width:0;display:flex;flex-direction:column;gap:18px}
.sidebar{flex:1 1 300px;max-width:336px;display:none;flex-direction:column;gap:24px}
@media (min-width:1024px){.sidebar{display:flex}}

.kicker{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--accent);margin:0}
h1{margin:0;font-size:30px;line-height:1.18;letter-spacing:-0.01em}
@media (min-width:768px){h1{font-size:38px}}
.byline{margin:0;font-size:14px;color:var(--muted)}
.intro{margin:0;font-size:18px;line-height:1.65;color:var(--ink-2)}

.progress{display:flex;align-items:center;gap:12px;font-size:15px;font-weight:700}
.bar{flex:1;height:6px;background:var(--line);border-radius:3px;overflow:hidden}
.bar i{display:block;height:100%;background:var(--accent)}

.figure{margin:0}
.figure img{display:block;width:100%;height:auto;border-radius:10px;background:#e9edf2}
.card img{display:block;width:100%;height:auto;border-radius:8px;margin-bottom:6px}
.cat{padding:8px 16px 8px}
.cat-h{font-size:24px;margin:24px 0 0}
.cat .cards{padding:16px 0 24px}
.img-ph{aspect-ratio:16/9;background:var(--soft);border:1px dashed #b8c0c8;border-radius:10px;display:flex;align-items:center;justify-content:center;text-align:center;padding:16px;color:var(--muted);font-size:15px}
.slide-h{margin:0;font-size:25px;line-height:1.25}
.slide-body{margin:0;font-size:18px;line-height:1.7;color:var(--ink-2)}

.pager{display:flex;flex-wrap:wrap;gap:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:54px;padding:0 22px;border-radius:8px;font-size:18px;font-weight:700;text-decoration:none}
.btn-next{flex:1;background:var(--accent);color:#fff}
.btn-next:hover{background:var(--accent-dark);color:#fff}
.btn-prev{border:1px solid #c4cad1;color:var(--ink);background:#fff}

.related h3{margin:0 0 10px;font-size:17px}
.related a{display:block;color:var(--ink);text-decoration:none;font-size:15px;line-height:1.45;padding:8px 0;border-top:1px solid var(--line)}
.related a:hover{color:var(--accent)}

.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px;padding:24px 16px 48px}
.card{border:1px solid var(--line);border-radius:12px;padding:20px;display:flex;flex-direction:column;gap:8px;text-decoration:none;color:var(--ink)}
.card:hover{border-color:var(--accent)}
.card h2{margin:0;font-size:20px;line-height:1.3}
.card p{margin:0;color:var(--muted);font-size:15px}

.prose{max-width:760px;padding:24px 16px 48px}
.prose h1{margin-bottom:16px}
.prose h2{font-size:21px;margin:28px 0 8px}
.prose p,.prose li{font-size:17px;line-height:1.7;color:var(--ink-2)}

.site-footer{border-top:1px solid var(--line);padding:24px 16px 96px;text-align:center;font-size:14px;color:var(--muted)}
.site-footer a{color:var(--muted)}