/* Ithire blog — clean, fast, readable. No framework, no JS required. */
:root{
  --bg:#ffffff;
  --bg-soft:#f6f8fb;
  --bg-soft2:#eef2f8;
  --ink:#10202e;
  --ink-soft:#46586a;
  --muted:#6b7b8c;
  --line:#e3e9f1;
  --brand:#1466d6;
  --brand-ink:#0d4ea8;
  --brand-soft:#e7f0fd;
  --accent:#0fb39a;
  --radius:14px;
  --radius-sm:10px;
  --maxw:1100px;
  --measure:720px;
  --shadow:0 1px 2px rgba(16,32,46,.06),0 8px 24px rgba(16,32,46,.06);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,"Apple Color Emoji","Segoe UI Emoji",sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);
  font-size:18px;line-height:1.7;-webkit-font-smoothing:antialiased;
}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto}
h1,h2,h3{line-height:1.25;color:var(--ink);letter-spacing:-.01em}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.86);backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:22px;color:var(--ink);letter-spacing:-.02em}
.brand:hover{text-decoration:none}
.brand .dot{width:11px;height:11px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px var(--brand-soft)}
.nav{display:flex;gap:22px;align-items:center}
.nav a{color:var(--ink-soft);font-size:15px;font-weight:600}
.nav a:hover{color:var(--brand);text-decoration:none}

/* ---------- hero ---------- */
.hero{background:linear-gradient(180deg,var(--bg-soft),#fff);border-bottom:1px solid var(--line)}
.hero .wrap{padding:64px 20px 56px;text-align:center}
.hero h1{font-size:clamp(30px,5vw,48px);margin:0 0 14px}
.hero p{font-size:clamp(17px,2.3vw,21px);color:var(--ink-soft);max-width:680px;margin:0 auto 26px}
.search{display:flex;max-width:560px;margin:0 auto;gap:8px}
.search input{flex:1;padding:14px 16px;border:1px solid var(--line);border-radius:var(--radius-sm);font-size:16px;background:#fff}
.search input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}

/* ---------- breadcrumbs ---------- */
.crumbs{font-size:13.5px;color:var(--muted);padding:18px 0 0}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0}
.crumbs li::after{content:"/";margin-left:8px;color:var(--line)}
.crumbs li:last-child::after{content:""}
.crumbs a{color:var(--muted)}
.crumbs li:last-child{color:var(--ink-soft);font-weight:600}

/* ---------- layout: article ---------- */
.article{padding:14px 0 64px}
.article .lead-meta{display:flex;flex-wrap:wrap;gap:10px 16px;align-items:center;color:var(--muted);font-size:14px;margin:18px 0 6px}
.tag{display:inline-block;background:var(--brand-soft);color:var(--brand-ink);font-weight:700;font-size:12.5px;padding:4px 11px;border-radius:999px;letter-spacing:.01em}
.post-h1{font-size:clamp(28px,4.4vw,40px);margin:6px 0 8px}
.prose{max-width:var(--measure)}
.prose p,.prose ul,.prose ol{margin:0 0 18px}
.prose h2{font-size:25px;margin:38px 0 12px;padding-top:6px}
.prose h3{font-size:20px;margin:28px 0 10px}
.prose ul{padding-left:0;list-style:none}
.prose ul li{position:relative;padding-left:30px;margin-bottom:10px}
.prose ul li::before{content:"";position:absolute;left:6px;top:12px;width:8px;height:8px;border-radius:2px;background:var(--accent)}
.prose ol{padding-left:22px}
.prose strong{color:var(--ink)}
.prose a{font-weight:600;text-decoration:underline;text-underline-offset:2px;text-decoration-color:#bcd5f5}
.prose hr{border:none;border-top:1px solid var(--line);margin:34px 0}

/* ---------- callout / cta ---------- */
.cta{margin:30px 0;background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px}
.cta h3{margin:0 0 6px;font-size:18px}
.cta p{margin:0 0 14px;color:var(--ink-soft);font-size:15.5px}
.btn{display:inline-block;background:var(--brand);color:#fff;font-weight:700;font-size:15px;padding:11px 20px;border-radius:var(--radius-sm)}
.btn:hover{background:var(--brand-ink);text-decoration:none}
.btn.ghost{background:#fff;color:var(--brand);border:1px solid var(--line)}

/* ---------- FAQ ---------- */
.faq{margin:30px 0;max-width:var(--measure)}
.faq h2{font-size:25px;margin:0 0 14px}
.faq details{border:1px solid var(--line);border-radius:var(--radius-sm);margin-bottom:10px;background:#fff;overflow:hidden}
.faq summary{cursor:pointer;list-style:none;padding:16px 18px;font-weight:700;font-size:16.5px;display:flex;justify-content:space-between;gap:12px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--brand);font-weight:700;font-size:20px;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details[open] summary{border-bottom:1px solid var(--line)}
.faq .answer{padding:14px 18px;color:var(--ink-soft);font-size:16px}

/* ---------- related ---------- */
.related{margin:28px 0 0;max-width:var(--measure)}

/* ---------- card grids (index/section) ---------- */
.section-block{padding:36px 0;border-bottom:1px solid var(--line)}
.section-block:last-child{border-bottom:none}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin:0 0 18px}
.section-head h2{font-size:24px;margin:0}
.section-head a{font-size:14px;font-weight:600}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(232px,1fr));gap:12px}
.card{display:block;border:1px solid var(--line);border-radius:var(--radius-sm);padding:14px 16px;background:#fff;transition:border-color .15s,box-shadow .15s,transform .15s}
.card:hover{text-decoration:none;border-color:#bcd5f5;box-shadow:var(--shadow);transform:translateY(-1px)}
.card .t{font-weight:700;color:var(--ink);font-size:15.5px}
.card .d{color:var(--muted);font-size:13px;margin-top:3px}
.sec-card{border-left:3px solid var(--brand)}

/* page intro */
.page-intro{padding:46px 0 8px}
.page-intro h1{font-size:clamp(28px,4.4vw,40px);margin:0 0 10px}
.page-intro p{color:var(--ink-soft);max-width:680px;margin:0;font-size:18px}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#c4d2e0;margin-top:40px;font-size:14.5px}
.site-footer .wrap{padding:42px 20px 28px;display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:28px}
.site-footer h4{color:#fff;font-size:13px;text-transform:uppercase;letter-spacing:.08em;margin:0 0 12px}
.site-footer a{color:#c4d2e0;display:block;margin-bottom:8px}
.site-footer a:hover{color:#fff}
.site-footer .brand{color:#fff;margin-bottom:10px}
.foot-bottom{border-top:1px solid #24384a;margin-top:18px}
.foot-bottom .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;padding:16px 20px;color:#8aa0b4}

@media(max-width:760px){
  body{font-size:17px}
  .nav{gap:14px}
  .nav a.hide-sm{display:none}
  .site-footer .wrap{grid-template-columns:1fr 1fr}
}
@media(max-width:520px){
  .site-footer .wrap{grid-template-columns:1fr}
  .hero .wrap{padding:46px 20px 40px}
}