/* Infinity Marine Surveying Services — shared styles for FAQ, blog and article pages.
   index.html and prices.html keep their own inline critical CSS. */

:root{
  --navy:#071c2b;--navy2:#0c2f45;--sea:#0f7890;--teal:#3ec2ba;--ice:#edf6f7;--sand:#f5f0e8;
  --ink:#11222d;--muted:#60717a;--white:#fff;--line:#d7e1e4;
  --shadow:0 20px 55px rgba(3,28,43,.14);
  --measure:72ch;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:#fff;line-height:1.65;font-size:17px}
a{color:var(--sea);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto}
.wrap{width:min(1160px,calc(100% - 40px));margin:auto}
.wrap-narrow{width:min(760px,calc(100% - 40px));margin:auto}
.skip{position:absolute;left:-9999px;top:0}
.skip:focus{left:12px;top:12px;z-index:99;background:var(--teal);color:#062a37;padding:10px 16px;border-radius:8px;font-weight:800}
:focus-visible{outline:3px solid var(--teal);outline-offset:2px}

/* ---- Header ---- */
.top{background:var(--navy);border-bottom:1px solid rgba(255,255,255,.08)}
.nav{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px;color:#fff}
.brand{display:flex;gap:12px;align-items:center;font-weight:800;letter-spacing:.02em;color:#fff}
.brand:hover{text-decoration:none}
.brand img{width:78px;height:58px;object-fit:contain;filter:drop-shadow(0 2px 5px rgba(0,0,0,.4))}
.brand span{font-size:13px;line-height:1.2;max-width:190px}
.links{display:flex;align-items:center;gap:24px;font-size:14px}
.links a{color:#dceaee}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 20px;border-radius:999px;background:var(--teal);color:#062a37;font-weight:800;border:0;cursor:pointer;text-align:center}
.btn:hover{text-decoration:none;filter:brightness(1.06)}
.btn.alt{background:transparent;color:var(--navy);border:1px solid rgba(7,28,43,.3)}
.btn.on-dark{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.55)}

/* ---- Page hero ---- */
.page-hero{background:linear-gradient(135deg,var(--navy),var(--navy2));color:#fff;padding:74px 0 66px}
.eyebrow{text-transform:uppercase;letter-spacing:.18em;font-weight:800;font-size:12px;color:#84ddd7}
.page-hero h1{font-size:clamp(36px,6vw,62px);line-height:1.02;letter-spacing:-.04em;margin:14px 0 20px}
.page-hero p{font-size:19px;color:#d8e5e9;max-width:70ch;margin:0}
.crumbs{font-size:13px;color:#9fbcc7;margin-bottom:6px}
.crumbs a{color:#9fbcc7;text-decoration:underline}
.crumbs span{opacity:.6;padding:0 6px}

/* ---- Body content ---- */
main{padding:64px 0 88px}
.prose{max-width:var(--measure)}
.prose h2{font-size:clamp(26px,3.4vw,36px);line-height:1.15;letter-spacing:-.025em;margin:52px 0 14px}
.prose h3{font-size:21px;margin:34px 0 10px}
.prose h2:first-child,.prose h3:first-child{margin-top:0}
.prose p{margin:0 0 18px}
.prose ul,.prose ol{margin:0 0 20px;padding-left:22px}
.prose li{margin-bottom:9px}
.prose strong{color:var(--navy)}
.prose blockquote{margin:26px 0;border-left:4px solid var(--teal);padding:4px 0 4px 20px;color:var(--muted);font-style:normal}
.lede{font-size:20px;color:var(--muted);margin-bottom:28px}
.callout{background:var(--ice);border:1px solid var(--line);border-radius:18px;padding:24px 26px;margin:30px 0}
.callout h3{margin-top:0}
.callout :last-child{margin-bottom:0}

/* ---- Tables ---- */
.table-scroll{overflow-x:auto;margin:26px 0;border:1px solid var(--line);border-radius:14px}
table{border-collapse:collapse;width:100%;font-size:15px;min-width:520px}
th,td{text-align:left;padding:13px 16px;border-bottom:1px solid var(--line)}
th{background:var(--ice);font-weight:800;color:var(--navy)}
tr:last-child td{border-bottom:0}

/* ---- FAQ accordion ---- */
.faq-group{margin-bottom:44px}
.faq-group > h2{font-size:clamp(24px,3vw,32px);letter-spacing:-.025em;margin:0 0 18px}
details.qa{border:1px solid var(--line);border-radius:16px;background:#fff;margin-bottom:12px;overflow:hidden}
details.qa[open]{box-shadow:0 10px 30px rgba(12,47,69,.06)}
details.qa summary{cursor:pointer;list-style:none;padding:20px 54px 20px 24px;font-weight:800;font-size:17px;color:var(--navy);position:relative}
details.qa summary::-webkit-details-marker{display:none}
details.qa summary::after{content:"+";position:absolute;right:24px;top:50%;transform:translateY(-50%);font-size:24px;font-weight:400;color:var(--sea);line-height:1}
details.qa[open] summary::after{content:"\2212"}
details.qa .answer{padding:0 24px 22px;color:var(--muted)}
details.qa .answer :first-child{margin-top:0}
details.qa .answer :last-child{margin-bottom:0}

/* ---- Blog listing ---- */
.post-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:22px}
.post-card{border:1px solid var(--line);border-radius:22px;padding:28px;background:#fff;box-shadow:0 10px 30px rgba(12,47,69,.04);display:flex;flex-direction:column}
.post-card .kicker{font-size:12px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--sea)}
.post-card h2{font-size:22px;line-height:1.2;letter-spacing:-.02em;margin:10px 0 10px}
.post-card h2 a{color:var(--ink)}
.post-card p{color:var(--muted);margin:0 0 18px;font-size:15px}
.post-card .more{margin-top:auto;font-weight:800;font-size:14px;color:var(--sea)}
.meta{font-size:13px;color:var(--muted);margin:0 0 26px}

/* ---- Article extras ---- */
.toc{background:var(--sand);border-radius:18px;padding:24px 26px;margin:0 0 36px}
.toc strong{display:block;font-size:13px;text-transform:uppercase;letter-spacing:.14em;color:var(--sea);margin-bottom:12px}
.toc ol{margin:0;padding-left:20px}
.toc li{margin-bottom:7px}
.next-steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin-top:20px}

/* ---- CTA band ---- */
.cta{padding:72px 0;background:var(--navy);color:#fff}
.cta h2{font-size:clamp(30px,4.4vw,46px);line-height:1.05;letter-spacing:-.03em;margin:0 0 14px}
.cta p{color:#c9d8de;max-width:64ch}
.cta .actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}

/* ---- Footer ---- */
footer{padding:44px 0 28px;background:#051621;color:#91a4ad;font-size:13px}
.foot-cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:28px;margin-bottom:30px}
.foot-cols strong{display:block;color:#fff;font-size:13px;text-transform:uppercase;letter-spacing:.12em;margin-bottom:12px}
.foot-cols a{display:block;color:#b9cad2;margin-bottom:8px}
.foot-bar{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.1);padding-top:20px;font-size:12px}
.foot-bar a{color:#b9cad2;text-decoration:underline}

@media(max-width:760px){
  .links a:not(.btn){display:none}
  main{padding:44px 0 64px}
  body{font-size:16px}
  .page-hero{padding:54px 0 48px}
}