/* ======================================================================
 * guides.css — shared styling for the DigiSurvey Knowledge / Guides
 * section (the SEO article hub + individual guide pages). Matches the
 * dark-premium look of the marketing landing pages (same tokens, nav,
 * footer) but lives in one file so every guide page shares it.
 * ==================================================================== */
:root{
  /* Light-green theme: soft mint page, white cards, deep-green ink, green accent */
  --ink:#eef7f1; --ink-2:#ffffff; --ink-3:#e4f1ea; --navy:#0b2545;
  --line:rgba(6,42,28,.10); --line-2:rgba(6,42,28,.17);
  --text:#0d241b; --muted:#45584f; --muted-2:#6a7d73;
  --gold:#12935d; --gold-2:#0f7a4e; --teal:#0f9d6b;
  --paper:#f7f5f0; --paper-2:#fff; --paper-ink:#0b1626; --paper-muted:#5a6475; --paper-line:#e6e1d6;
  --radius:12px; --wrap:1120px;
  --display:'Sora', system-ui, sans-serif; --body:'Inter', system-ui, sans-serif; --mono:'JetBrains Mono', ui-monospace, monospace;
}
*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth; -webkit-text-size-adjust:100%;}
@media (prefers-reduced-motion: reduce){ html{scroll-behavior:auto;} *{animation:none !important; transition:none !important;} }
body{background:
    radial-gradient(1100px 520px at 8% -10%, rgba(18,147,93,.08), transparent 60%),
    radial-gradient(900px 460px at 100% -6%, rgba(15,157,107,.06), transparent 55%),
    var(--ink); color:var(--text); font-family:var(--body); font-size:16px; line-height:1.7; overflow-x:hidden;}
img{max-width:100%; display:block; height:auto;}
a{color:inherit; text-decoration:none;}
:focus-visible{outline:2px solid var(--gold); outline-offset:3px; border-radius:6px;}
.wrap{width:100%; max-width:var(--wrap); margin:0 auto; padding:0 20px;}
.skip{position:absolute; left:-9999px; top:8px; background:var(--gold); color:#fff; padding:8px 14px; border-radius:6px; z-index:100;}
.skip:focus{left:12px;}
h1,h2,h3,h4{font-family:var(--display); letter-spacing:-.02em; line-height:1.18;}
h1{font-size:clamp(1.9rem, 4.2vw, 3rem); font-weight:800; letter-spacing:-.03em;}
h1 .accent{background:linear-gradient(92deg,#1fb074 5%,#12935d 45%,#0f9d6b 100%); -webkit-background-clip:text; background-clip:text; color:transparent;}
h2{font-size:clamp(1.4rem, 2.6vw, 1.95rem); font-weight:700; margin-top:0;}
h3{font-size:1.15rem; font-weight:600;}
.eyebrow{font-family:var(--mono); font-size:12px; letter-spacing:.14em; text-transform:uppercase; color:var(--gold); display:inline-flex; align-items:center; gap:10px; margin-bottom:14px;}
.eyebrow::before{content:""; width:22px; height:1px; background:currentColor; opacity:.7;}
.lead{color:var(--muted); font-size:1.1rem; max-width:720px; margin-top:16px;}
.ic{width:22px; height:22px; stroke:currentColor; fill:none; stroke-width:1.7; stroke-linecap:round; stroke-linejoin:round; flex-shrink:0;}

/* buttons */
.btn{display:inline-flex; align-items:center; justify-content:center; gap:10px; min-height:48px; padding:0 22px; border-radius:8px; font-weight:600; font-size:15px; border:1px solid transparent; cursor:pointer; transition:transform .15s ease, background .15s ease, border-color .15s ease; white-space:nowrap;}
.btn:hover{transform:translateY(-1px);}
.btn-primary{background:linear-gradient(180deg,#1fb074,#0f8a54); color:#fff; box-shadow:0 8px 24px rgba(18,147,93,.28), inset 0 1px 0 rgba(255,255,255,.25);}
.btn-ghost{border-color:var(--line-2); color:var(--text); background:rgba(6,42,28,.02);}
.btn-ghost:hover{border-color:rgba(6,42,28,.28); background:rgba(6,42,28,.05);}

/* header / nav */
header.site{position:sticky; top:0; z-index:50; background:rgba(255,255,255,.82); -webkit-backdrop-filter:saturate(150%) blur(14px); backdrop-filter:saturate(150%) blur(14px); border-bottom:1px solid var(--line);}
.nav{display:flex; align-items:center; justify-content:space-between; height:66px; gap:20px;}
.brand{display:flex; align-items:center; gap:10px; font-family:var(--display); font-weight:700; font-size:19px; letter-spacing:-.02em; white-space:nowrap;}
.brand small{display:block; font-family:var(--mono); font-weight:500; font-size:9.5px; letter-spacing:.12em; color:var(--muted-2); text-transform:uppercase; margin-top:-2px;}
.brand-mark{width:34px; height:34px;}
.nav-links{display:flex; gap:24px; font-size:14px; color:var(--muted);}
.nav-links a{white-space:nowrap;}
.nav-links a:hover, .nav-links a[aria-current="page"]{color:var(--text);}
.nav-cta{display:flex; gap:10px; align-items:center;}
.nav-cta .btn{min-height:40px; padding:0 16px; font-size:14px;}
@media (max-width:1100px){ .nav-links a.opt{display:none;} }
@media (max-width:820px){ .nav-links{display:none;} .nav-cta .hide-sm{display:none;} }

/* hero / breadcrumb */
section{padding:72px 0; position:relative;}
@media (max-width:720px){ section{padding:52px 0;} }
.hero{padding:40px 0 10px;}
.crumbs{font-size:13px; color:var(--muted-2); margin-bottom:18px; font-family:var(--mono);}
.crumbs a:hover{color:var(--text);} .crumbs span[aria-hidden]{margin:0 8px; opacity:.6;}
.hero-meta{display:flex; flex-wrap:wrap; gap:10px 18px; margin-top:20px; color:var(--muted-2); font-size:13px; font-family:var(--mono);}
.hero-meta span{display:inline-flex; align-items:center; gap:7px;}
.chips{display:flex; flex-wrap:wrap; gap:8px; margin-top:22px;}
.chips span{font-size:12.5px; color:var(--muted); border:1px solid var(--line-2); border-radius:999px; padding:5px 12px;}

/* article layout */
.article{padding:40px 0 20px;}
.article .wrap{max-width:820px;}
.prose > *{max-width:760px;}
.prose h2{margin:40px 0 6px;}
.prose h3{margin:26px 0 4px; color:var(--text);}
.prose p{color:var(--muted); margin-top:14px;}
.prose ul, .prose ol{color:var(--muted); margin:14px 0 0 2px; padding-left:22px;}
.prose li{margin-top:8px;}
.prose strong{color:var(--text);}
.prose a{color:var(--gold-2); border-bottom:1px solid rgba(18,147,93,.35);}
.prose a:hover{border-bottom-color:var(--gold);}
.callout{border:1px solid var(--line-2); background:linear-gradient(180deg, rgba(15,157,107,.08), rgba(15,157,107,.02)); border-left:3px solid var(--teal); border-radius:10px; padding:16px 18px; margin:22px 0; color:var(--muted);}
.callout b{color:var(--text);}
.callout.warn{border-left-color:#d9892f; background:linear-gradient(180deg, rgba(217,137,47,.09), rgba(217,137,47,.02));}
.tldr{border:1px solid var(--line); background:var(--ink-2); border-radius:14px; padding:20px 22px; margin-top:26px;}
.tldr h2{font-size:1.05rem; margin:0 0 8px; color:var(--gold);}
.tldr ul{margin:0; padding-left:20px; color:var(--muted);} .tldr li{margin-top:7px;}

/* key-points grid */
.kgrid{display:grid; grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); gap:14px; margin-top:22px;}
.kcard{border:1px solid var(--line); background:var(--ink-2); border-radius:12px; padding:18px;}
.kcard h3{font-size:1rem; margin-bottom:6px;}
.kcard p{color:var(--muted); font-size:.95rem; margin:0;}

/* FAQ */
.faq{margin-top:14px;}
.faq details{border:1px solid var(--line); border-radius:10px; background:var(--ink-2); margin-top:10px; overflow:hidden;}
.faq summary{cursor:pointer; padding:15px 18px; font-weight:600; color:var(--text); list-style:none; display:flex; justify-content:space-between; gap:12px;}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{content:"+"; color:var(--gold); font-size:20px; line-height:1;}
.faq details[open] summary::after{content:"–";}
.faq .a{padding:0 18px 16px; color:var(--muted);}

/* hub cards */
.cardgrid{display:grid; grid-template-columns:repeat(auto-fill,minmax(320px,1fr)); gap:18px; margin-top:30px;}
.gcard{display:flex; flex-direction:column; border:1px solid var(--line); background:var(--ink-2); border-radius:14px; padding:22px; transition:border-color .15s ease, transform .15s ease;}
.gcard:hover{border-color:var(--line-2); transform:translateY(-2px);}
.gcard .tag{font-family:var(--mono); font-size:11px; letter-spacing:.1em; text-transform:uppercase; color:var(--teal); margin-bottom:10px;}
.gcard h3{font-size:1.12rem; color:var(--text); margin-bottom:8px;}
.gcard p{color:var(--muted); font-size:.95rem; flex:1;}
.gcard .more{margin-top:14px; color:var(--gold-2); font-weight:600; font-size:14px; display:inline-flex; align-items:center; gap:8px;}
.gcard.soon{opacity:.62;} .gcard.soon .more{color:var(--muted-2);}

/* cta band */
.cta{text-align:center; overflow:hidden; border-top:1px solid var(--line); background:var(--ink-2);}
.cta::before{content:""; position:absolute; inset:0; background:radial-gradient(700px 320px at 50% 0%, rgba(18,147,93,.14), transparent 70%); pointer-events:none;}
.cta h2{max-width:720px; margin:0 auto;} .cta .lead{margin:14px auto 0;}
.cta .hero-ctas{display:flex; flex-wrap:wrap; gap:12px; justify-content:center; margin-top:26px;}
@media (max-width:480px){ .cta .hero-ctas .btn{width:100%;} }

/* footer */
footer{border-top:1px solid var(--line); padding:54px 0 34px; background:#e4f1ea;}
.foot{display:grid; grid-template-columns:1.6fr 1fr 1fr 1fr; gap:30px;}
.foot .brand{margin-bottom:12px;}
.foot p{color:var(--muted); font-size:14px; max-width:360px;}
.foot h4{font-family:var(--display); font-size:14px; color:var(--text); margin-bottom:12px;}
.foot ul{list-style:none;} .foot li{margin-top:8px;} .foot li a{color:var(--muted); font-size:14px;} .foot li a:hover{color:var(--text);}
.foot-bottom{border-top:1px solid var(--line); margin-top:34px; padding-top:20px; display:flex; flex-wrap:wrap; gap:10px 24px; color:var(--muted-2); font-size:12.5px;}
@media (max-width:860px){ .foot{grid-template-columns:1fr 1fr;} }
@media (max-width:520px){ .foot{grid-template-columns:1fr;} }