/*
 * Shared stylesheet for the guide pages (the problem-targeted SEO pages).
 *
 * VERSIONED FILENAME: firebase.json caches *.css as immutable for a year, so an
 * edit to this file never reaches returning visitors. Change = new file
 * (guide.v2.css) + update every <link>. Never edit a published version in place.
 *
 * Tokens are the landing palette from index.html :root (brand-colors.md). H1 is
 * solid --pv-text; the gradient is only the small underline accent.
 */
:root{
  --pv-blue:#3B82F6;
  --pv-blue-dark:#2563EB;
  --pv-coral:#F97316;
  --pv-text:#111827;
  --pv-muted:#6B7280;
  --pv-card:#fff;
  --pv-bg:#FAFAF9;
  --pv-success:#16A34A;
  --pv-warning:#F59E0B;
  --pv-danger:#DC2626;
  --pv-line:#e5e7eb;
  --r:18px;
}
*{box-sizing:border-box}
body{
  margin:0;
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  color:var(--pv-text);
  background:linear-gradient(to bottom,#FAFAF9 0%,#F5F3EF 50%,#EAE5DA 100%);
  background-attachment:fixed;
  line-height:1.65;
  font-size:17px;
}
img{max-width:100%}
a{color:var(--pv-blue-dark)}
.wrap{max-width:1080px;margin:0 auto;padding-inline:20px;padding-block:20px}
.prose{max-width:760px;margin:0 auto}

/* header */
.site-header{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:800;color:var(--pv-text);text-decoration:none}
.mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--pv-blue),var(--pv-coral));box-shadow:0 8px 24px rgba(59,130,246,.25)}
.site-header nav a{color:#333;margin-left:16px;font-weight:500;text-decoration:none}
.site-header nav a.login-btn{color:#fff;background:var(--pv-blue);padding:8px 18px;border-radius:12px;font-weight:600}

/* hero */
.guide-hero{text-align:center;margin:48px auto 40px;max-width:820px}
.eyebrow{font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--pv-blue)}
h1{font-size:clamp(34px,5.5vw,56px);line-height:1.12;font-weight:900;margin:14px 0 18px;color:var(--pv-text)}
.guide-hero h1::after{content:'';display:block;width:96px;height:5px;margin:20px auto 0;border-radius:999px;background:linear-gradient(90deg,var(--pv-blue),var(--pv-coral))}
.lede{font-size:20px;color:#374151;margin:0 auto;max-width:700px}
h2{font-size:clamp(26px,3.6vw,34px);line-height:1.2;font-weight:800;margin:56px 0 16px}
h3{font-size:20px;font-weight:700;margin:28px 0 8px}
.muted{color:var(--pv-muted)}

/* CTAs — the DEMO number must be readable, not just linked: sms: does nothing on a laptop */
.cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin:28px 0 10px}
.btn{display:inline-block;padding:14px 26px;font-size:17px;font-weight:700;border-radius:14px;text-decoration:none;box-shadow:0 8px 20px rgba(0,0,0,.12)}
.btn-solid{background:var(--pv-blue);color:#fff}
.btn-solid:hover{background:var(--pv-blue-dark)}
.btn-ghost{background:#fff;color:var(--pv-blue-dark);border:2px solid var(--pv-blue)}
.cta-note{font-size:14px;color:var(--pv-muted);text-align:center;margin:6px 0 0}

/* cards + grids */
.card{background:var(--pv-card);border:1px solid var(--pv-line);border-radius:var(--r);padding:22px 24px;box-shadow:0 10px 24px rgba(0,0,0,.05)}
.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin:20px 0}
@media(max-width:760px){.grid2{grid-template-columns:1fr}}
.card h3{margin-top:0}
.card ul{padding-left:20px;margin:8px 0 0}
.is-yes h3{color:var(--pv-success)}
.is-no h3{color:var(--pv-danger)}

/* the worked-example board */
.board{width:100%;border-collapse:collapse;font-size:15px}
.board th,.board td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--pv-line)}
.board .tag{white-space:nowrap}
.board th{font-size:13px;text-transform:uppercase;letter-spacing:.04em;color:var(--pv-muted)}
.table-scroll{overflow-x:auto;margin:16px 0}
.tag{display:inline-block;padding:2px 10px;border-radius:999px;font-size:13px;font-weight:600}
.tag-ready{background:#DCFCE7;color:#166534}
.tag-missing{background:#FEE2E2;color:#991B1B}
.tag-progress{background:#FEF3C7;color:#92400E}

/* static SMS thread (no animation — these pages are read, not watched) */
.thread{background:#fff;border:3px solid var(--pv-blue);border-radius:20px;padding:20px;max-width:520px;margin:20px auto;display:flex;flex-direction:column}
.msg{padding:11px 16px;margin:6px 0;border-radius:18px;font-size:15px;line-height:1.45;max-width:85%}
.msg.pv{background:#f1f5f9;align-self:flex-start;border-bottom-left-radius:4px}
.msg.parent{background:#0084ff;color:#fff;align-self:flex-end;border-bottom-right-radius:4px}
.thread-caption{text-align:center;font-size:14px;color:var(--pv-muted);margin:0 0 24px}

/* side-by-side message comparison */
.compare .msg{max-width:100%}

/* checklist */
.checklist{list-style:none;padding:0;margin:12px 0}
.checklist li{display:flex;gap:12px;align-items:flex-start;padding:10px 0;border-bottom:1px solid var(--pv-line)}
.checklist input{width:20px;height:20px;margin-top:4px;flex:none}
.checklist label{flex:1}
.checklist .when{display:block;font-size:14px;color:var(--pv-muted)}

/* comparison table */
.cmp{width:100%;border-collapse:collapse;font-size:15px;background:#fff;border-radius:12px;overflow:hidden}
.cmp th,.cmp td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--pv-line);vertical-align:top}
.cmp thead th{background:#F1F5F9}

/* FAQ — visible content; no FAQPage markup (Google limits that rich result) */
.faq details{background:#fff;border:1px solid var(--pv-line);border-radius:14px;padding:14px 18px;margin:10px 0}
.faq summary{font-weight:700;cursor:pointer}
.faq details p{margin:10px 0 0}

/* closing CTA */
.cta-box{background:linear-gradient(135deg,var(--pv-blue) 0%,var(--pv-blue-dark) 100%);color:#fff;border-radius:24px;padding:40px 28px;margin:56px 0;text-align:center}
.cta-box h2{color:#fff;margin:0 0 10px}
.cta-box p{margin:0 auto;max-width:620px}
.cta-box .btn-solid{background:#fff;color:var(--pv-blue-dark)}
.cta-box .btn-ghost{background:transparent;color:#fff;border-color:#fff}
.cta-box .cta-note{color:#fff;opacity:.85}

/* footer + Guides list (chrome.test.js asserts data-guides on every guide page) */
.site-footer{margin-top:56px;padding-top:24px;border-top:1px solid var(--pv-line);font-size:14px;color:var(--pv-muted)}
.guides{margin:0 0 18px}
.guides strong{display:block;color:var(--pv-text);margin-bottom:6px}
.guides ul{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:6px 18px}
.legal-links{display:flex;flex-wrap:wrap;gap:8px 14px;justify-content:space-between}

@media print{
  body{background:#fff;font-size:12pt}
  .site-header nav,.cta-row,.cta-box,.site-footer,.no-print,.faq{display:none!important}
  .card,.thread{box-shadow:none}
  .checklist li{break-inside:avoid}
  a{color:inherit;text-decoration:none}
}