/* ahco.tech — modern blog theme */
:root{
  --bg:#ffffff; --bg-soft:#f8fafc; --bg-card:#ffffff;
  --ink:#0f172a; --ink-soft:#475569; --ink-faint:#94a3b8;
  --line:#e2e8f0; --accent:#4f46e5; --accent-soft:#eef2ff; --accent-ink:#4338ca;
  --good:#059669; --warn:#d97706;
  --radius:14px; --shadow:0 1px 2px rgba(15,23,42,.05),0 8px 24px -12px rgba(15,23,42,.12);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
[data-theme="dark"]{
  --bg:#0b1120; --bg-soft:#0f172a; --bg-card:#111c33;
  --ink:#e2e8f0; --ink-soft:#a8b6cc; --ink-faint:#5b6b86;
  --line:#1e2a44; --accent:#818cf8; --accent-soft:#1b2451; --accent-ink:#c7d2fe;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px -12px rgba(0,0,0,.5);
}
*{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:17px;-webkit-font-smoothing:antialiased;transition:background .25s,color .25s}
img{max-width:100%;height:auto;border-radius:10px}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1080px;margin:0 auto;padding:0 22px}
.wrap-narrow{max-width:760px;margin:0 auto;padding:0 22px}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--ink);letter-spacing:-.02em}
.brand:hover{text-decoration:none}
.brand-mark{width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,#4f46e5,#7c3aed);color:#fff;display:grid;place-items:center;font-size:15px;font-weight:800}
.nav-links{display:flex;gap:26px;align-items:center}
.nav-links a{color:var(--ink-soft);font-weight:500;font-size:15.5px}
.nav-links a:hover{color:var(--accent);text-decoration:none}
.theme-btn{background:none;border:1px solid var(--line);border-radius:10px;width:38px;height:38px;cursor:pointer;font-size:17px;color:var(--ink-soft);display:grid;place-items:center}
.theme-btn:hover{border-color:var(--accent);color:var(--accent)}
.burger{display:none;background:none;border:1px solid var(--line);border-radius:10px;width:38px;height:38px;cursor:pointer;color:var(--ink)}

/* ---------- hero ---------- */
.hero{padding:72px 0 54px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:-40% -20% auto;height:480px;background:radial-gradient(600px 300px at 20% 40%,rgba(79,70,229,.14),transparent 70%),radial-gradient(500px 260px at 80% 30%,rgba(124,58,237,.12),transparent 70%);pointer-events:none}
.hero-kicker{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);background:var(--accent-soft);padding:6px 14px;border-radius:999px;margin-bottom:18px}
.hero h1{font-size:clamp(34px,5vw,54px);line-height:1.12;letter-spacing:-.03em;font-weight:800;max-width:16em}
.hero h1 .grad{background:linear-gradient(120deg,#4f46e5,#7c3aed 60%,#2563eb);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:19px;color:var(--ink-soft);max-width:38em;margin-top:16px}
.hero-stats{display:flex;gap:34px;margin-top:28px;flex-wrap:wrap}
.hero-stats div b{display:block;font-size:24px;letter-spacing:-.02em}
.hero-stats div span{font-size:13.5px;color:var(--ink-faint)}

/* ---------- cards ---------- */
.section{padding:34px 0}
.section-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:22px}
.section-head h2{font-size:25px;letter-spacing:-.02em;font-weight:750}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .18s,box-shadow .18s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-4px);text-decoration:none}
.card-media{aspect-ratio:16/9;overflow:hidden;background:var(--bg-soft);display:block}
.card-media img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .3s}
.card:hover .card-media img{transform:scale(1.04)}
.card-art{aspect-ratio:16/9;display:flex;align-items:center;justify-content:center;font-size:44px;font-weight:800;color:#fff;letter-spacing:-.02em}
.art-1{background:linear-gradient(135deg,#4f46e5,#7c3aed)}
.art-2{background:linear-gradient(135deg,#0ea5e9,#2563eb)}
.art-3{background:linear-gradient(135deg,#dc2626,#7c2d12)}
.art-4{background:linear-gradient(135deg,#059669,#0d9488)}
.art-5{background:linear-gradient(135deg,#7c3aed,#db2777)}
.card-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.pill{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--accent-ink);background:var(--accent-soft);padding:4px 11px;border-radius:999px;width:fit-content}
.card h3{font-size:18.5px;line-height:1.35;letter-spacing:-.015em;color:var(--ink)}
.card p{font-size:14.5px;color:var(--ink-soft);line-height:1.6;flex:1}
.card-meta{display:flex;gap:12px;font-size:13px;color:var(--ink-faint);margin-top:4px}

/* ---------- article ---------- */
.crumbs{font-size:13.5px;color:var(--ink-faint);margin:26px 0 8px}
.crumbs a{color:var(--ink-faint)}
.post-hero{padding:10px 0 8px}
.post-hero h1{font-size:clamp(30px,4.4vw,44px);letter-spacing:-.028em;line-height:1.18;font-weight:800}
.post-hero .sub{color:var(--ink-soft);font-size:18px;margin-top:12px;max-width:40em}
.post-meta{display:flex;gap:16px;align-items:center;margin:18px 0 6px;font-size:14px;color:var(--ink-faint);flex-wrap:wrap}
.post-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--ink-faint)}
.post-cover{margin:22px 0 8px}
.post-cover img{width:100%;border-radius:var(--radius);box-shadow:var(--shadow)}
.post-cover figcaption{font-size:13.5px;color:var(--ink-faint);text-align:center;margin-top:8px}
.prose{font-size:17.5px}
.prose h2{font-size:26px;letter-spacing:-.02em;margin:38px 0 12px;font-weight:750}
.prose h3{font-size:20px;margin:28px 0 8px;font-weight:700}
.prose p{margin:0 0 16px;color:var(--ink)}
.prose ul,.prose ol{margin:0 0 18px 22px}
.prose li{margin-bottom:8px}
.prose li::marker{color:var(--accent);font-weight:700}
.prose code{font-family:var(--mono);font-size:.88em;background:var(--bg-soft);border:1px solid var(--line);padding:2px 7px;border-radius:6px;color:var(--accent-ink)}
.prose pre{background:#0f172a;color:#e2e8f0;padding:18px 20px;border-radius:12px;overflow-x:auto;margin:0 0 20px;font-size:14.5px;line-height:1.65}
.prose pre code{background:none;border:none;padding:0;color:inherit}
[data-theme="dark"] .prose pre{background:#020617;border:1px solid var(--line)}
.callout{border:1px solid var(--line);border-left:4px solid var(--accent);background:var(--accent-soft);border-radius:0 12px 12px 0;padding:16px 20px;margin:22px 0;font-size:16px}
.callout.good{border-left-color:var(--good)}
.callout.warn{border-left-color:var(--warn)}
.callout b{display:block;margin-bottom:4px}
.figure{margin:24px 0}
.figure img{box-shadow:var(--shadow)}
.figure figcaption{font-size:13.5px;color:var(--ink-faint);text-align:center;margin-top:8px}
.steps{counter-reset:step;list-style:none;margin:0 0 20px;padding:0}
.steps li{counter-increment:step;position:relative;padding:14px 18px 14px 62px;border:1px solid var(--line);border-radius:12px;margin-bottom:12px;background:var(--bg-card)}
.steps li::before{content:counter(step);position:absolute;left:16px;top:14px;width:32px;height:32px;border-radius:50%;background:var(--accent);color:#fff;font-weight:800;display:grid;place-items:center;font-size:15px}
.steps li b{color:var(--ink)}
.faq{border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden}
.faq summary{cursor:pointer;padding:15px 20px;font-weight:650;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--accent);font-weight:800}
.faq[open] summary::after{content:"–"}
.faq .faq-body{padding:0 20px 18px;color:var(--ink-soft);font-size:16px}
.tags{display:flex;gap:10px;flex-wrap:wrap;margin:30px 0}
.tag{font-size:13px;border:1px solid var(--line);border-radius:999px;padding:5px 14px;color:var(--ink-soft)}
.author-box{display:flex;gap:16px;align-items:center;border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin:34px 0;background:var(--bg-soft)}
.author-avatar{width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,#4f46e5,#7c3aed);color:#fff;display:grid;place-items:center;font-weight:800;font-size:22px;flex-shrink:0}
.author-box b{display:block}
.author-box p{font-size:14.5px;color:var(--ink-soft);margin:0}
.related{margin:44px 0 10px}
.progress{position:fixed;top:0;left:0;height:3px;background:linear-gradient(90deg,#4f46e5,#7c3aed);width:0;z-index:60}

/* ---------- about / misc ---------- */
.page-hero{padding:56px 0 10px}
.page-hero h1{font-size:clamp(32px,4.5vw,46px);letter-spacing:-.03em;font-weight:800}
.page-hero p{color:var(--ink-soft);font-size:18px;max-width:38em;margin-top:12px}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin:30px 0}
.mini-card{border:1px solid var(--line);border-radius:var(--radius);padding:24px;background:var(--bg-card)}
.mini-card h3{font-size:18px;margin-bottom:8px}
.mini-card p{font-size:15px;color:var(--ink-soft)}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);margin-top:60px;padding:40px 0 34px;background:var(--bg-soft)}
.foot-grid{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
.foot-grid p{font-size:14px;color:var(--ink-faint);max-width:32em}
.foot-links{display:flex;gap:22px;font-size:14.5px}
.foot-links a{color:var(--ink-soft)}
.copy{margin-top:26px;font-size:13px;color:var(--ink-faint)}

/* ---------- responsive ---------- */
@media(max-width:900px){.grid{grid-template-columns:repeat(2,1fr)}.two-col{grid-template-columns:1fr}}
@media(max-width:640px){
  .grid{grid-template-columns:1fr}
  .nav-links{position:fixed;top:64px;left:0;right:0;background:var(--bg);flex-direction:column;align-items:flex-start;padding:18px 22px 26px;gap:16px;border-bottom:1px solid var(--line);display:none}
  .nav-links.open{display:flex}
  .burger{display:grid;place-items:center}
  .hero{padding:52px 0 40px}
}