/* AI Website Auditor — single stylesheet, no framework. */
:root {
  --bg: #f7f8fb;
  --surface: #ffffff;
  --text: #121826;
  --muted: #5b6475;
  --border: #e3e7ef;
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --good: #15803d;
  --ok: #b45309;
  --bad: #c2410c;
  --critical: #dc2626;
  --warning: #d97706;
  --info: #2563eb;
  --pass: #16a34a;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.05), 0 4px 16px rgba(16, 24, 40, 0.05);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --surface: #161b22;
    --text: #e6edf3;
    --muted: #9aa4b2;
    --border: #2a313c;
    --primary: #818cf8;
    --primary-dark: #6366f1;
    --good: #4ade80;
    --ok: #fbbf24;
    --bad: #fb923c;
    --shadow: none;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.6; font-size: 16px; }
a { color: var(--primary); }
img { max-width: 100%; height: auto; }
h1, h2, h3, h4 { line-height: 1.25; margin: 1.4em 0 0.5em; }
h1 { font-size: clamp(2rem, 5vw, 3.2rem); letter-spacing: -0.02em; margin-top: 0.3em; }
h2, .h2 { font-size: 1.6rem; }
h3, .h3 { font-size: 1.2rem; }
.h4, h4 { font-size: 1rem; }
pre { background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 12px; overflow-x: auto; font-size: 0.85rem; white-space: pre-wrap; word-break: break-word; }
code { font-family: var(--mono); }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { text-align: left; padding: 8px; border-bottom: 1px solid var(--border); vertical-align: top; }
.table-wrap { overflow-x: auto; }

.container { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 760px; }
.center { text-align: center; }
.muted { color: var(--muted); }
.small { font-size: 0.875rem; }
.break { word-break: break-all; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.eyebrow { text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.78rem; font-weight: 600; color: var(--primary); margin: 0; }
.lead { font-size: 1.15rem; color: var(--muted); }

/* Header & footer */
.site-header { background: var(--surface); border-bottom: 1px solid var(--border); }
.nav { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; flex-wrap: wrap; }
.logo { font-weight: 700; color: var(--text); text-decoration: none; display: flex; align-items: center; gap: 8px; }
.logo-mark { color: var(--primary); font-size: 1.4rem; }
.nav nav { display: flex; gap: 18px; flex-wrap: wrap; }
.nav nav a { color: var(--muted); text-decoration: none; font-size: 0.95rem; }
.nav nav a:hover { color: var(--text); }
.site-footer { margin-top: 80px; padding: 32px 0; border-top: 1px solid var(--border); color: var(--muted); font-size: 0.9rem; }
.footer-grid { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.footer-grid a { color: var(--muted); }

/* Hero & form */
.hero { padding: 72px 0 40px; }
.tool-hero { padding-top: 48px; }
.audit-form { display: flex; gap: 8px; margin: 28px auto 12px; max-width: 620px; flex-wrap: wrap; }
.audit-form input { flex: 1 1 260px; min-width: 0; font-size: 1.05rem; padding: 14px 16px; border-radius: 12px; border: 1px solid var(--border); background: var(--surface); color: var(--text); }
.audit-form input:focus { outline: 3px solid color-mix(in srgb, var(--primary) 35%, transparent); border-color: var(--primary); }
.form-error { flex-basis: 100%; color: var(--critical); margin: 4px 0 0; text-align: left; }
.button, .audit-form button { display: inline-block; background: var(--primary); color: #fff; border: 0; border-radius: 12px; padding: 14px 22px; font-size: 1rem; font-weight: 600; cursor: pointer; text-decoration: none; }
.button:hover, .audit-form button:hover { background: var(--primary-dark); }
.button:disabled, .audit-form button:disabled { opacity: 0.6; cursor: progress; }
.button.secondary { background: transparent; color: var(--primary); border: 1px solid var(--border); padding: 10px 16px; }
.link-button { background: none; border: 0; color: var(--muted); text-decoration: underline; cursor: pointer; margin-left: 16px; }

/* Cards & layout */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); margin: 16px 0; }
.cards { display: grid; gap: 16px; }
.cards.two { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.cards.three { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.cards .card { margin: 0; }
.link-card { color: inherit; text-decoration: none; }
.link-card:hover { border-color: var(--primary); }
.link-card h2 { margin-top: 0; color: var(--primary); }
.how h2 { margin-top: 0; }
.checklist { padding-left: 0; list-style: none; }
.checklist li { padding-left: 1.6em; position: relative; margin: 6px 0; }
.checklist li::before { content: "✓"; position: absolute; left: 0; color: var(--pass); font-weight: 700; }
.cta-box { text-align: center; }
.notice { background: color-mix(in srgb, var(--warning) 12%, var(--surface)); border: 1px solid color-mix(in srgb, var(--warning) 35%, transparent); padding: 10px 14px; border-radius: 10px; }
.good-notice { background: color-mix(in srgb, var(--pass) 12%, var(--surface)); border-color: color-mix(in srgb, var(--pass) 35%, transparent); }
.prose p, .prose li { max-width: 70ch; }
.plan .price { font-size: 1.5rem; font-weight: 700; margin: 0 0 8px; }

/* Progress */
.progress { display: flex; align-items: center; justify-content: center; gap: 12px; padding: 40px 0; }
.progress[hidden] { display: none; }
.spinner { width: 28px; height: 28px; border: 3px solid var(--border); border-top-color: var(--primary); border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spinner { animation-duration: 3s; } }

/* Report */
.report-header { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; flex-wrap: wrap; margin-top: 32px; }
.report-header h1 { margin: 4px 0; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
.score-panel { display: grid; grid-template-columns: 220px 1fr; gap: 32px; align-items: center; }
.score-ring { position: relative; width: 200px; margin: 0 auto; text-align: center; }
.ring { width: 200px; height: 200px; transform: rotate(-90deg); }
.ring circle { fill: none; stroke-width: 10; stroke-linecap: round; }
.ring .track { stroke: var(--border); }
.ring.good .value { stroke: var(--good); }
.ring.ok .value { stroke: var(--ok); }
.ring.bad .value { stroke: var(--bad); }
.score-value { position: absolute; top: 0; left: 0; width: 200px; height: 200px; display: flex; align-items: baseline; justify-content: center; padding-top: 70px; }
.score-value strong { font-size: 3.4rem; line-height: 1; }
.score-value span { color: var(--muted); }
.grade { font-weight: 700; margin: 4px 0 0; }
.good { color: var(--good); }
.ok { color: var(--ok); }
.bad { color: var(--bad); }
.categories { display: grid; gap: 12px; margin-top: 8px; }
.category-head { display: flex; justify-content: space-between; }
.bar { height: 8px; background: var(--border); border-radius: 99px; overflow: hidden; }
.fill { display: block; height: 100%; border-radius: 99px; }
.fill.good { background: var(--good); }
.fill.ok { background: var(--ok); }
.fill.bad { background: var(--bad); }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
.stat { display: flex; flex-direction: column; margin: 0; }
.stat strong { font-size: 1.4rem; }
.issues h2 { display: flex; align-items: center; gap: 8px; }
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; }
.dot.critical { background: var(--critical); }
.dot.warning { background: var(--warning); }
.dot.info { background: var(--info); }
.dot.pass { background: var(--pass); margin-right: 8px; }
.issue { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; margin: 10px 0; }
.issue summary, .issue-head { padding: 14px 16px; cursor: pointer; display: flex; gap: 10px; align-items: center; list-style: none; }
.issue summary::-webkit-details-marker { display: none; }
.issue summary::after { content: "+"; margin-left: auto; color: var(--muted); font-size: 1.2rem; }
.issue[open] summary::after { content: "−"; }
.issue-title { font-weight: 600; }
.issue-body { padding: 0 16px 16px; border-top: 1px solid var(--border); }
.issue-body h4 { margin: 14px 0 4px; color: var(--muted); font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.05em; }
.issue-body p { margin: 0; }
.issue.locked { opacity: 0.75; }
.issue.locked .issue-head { cursor: default; }
.issue.locked p { padding: 0 16px 12px; margin: 0; }
.lock { margin-left: auto; }
.affected { padding-left: 18px; font-size: 0.9rem; word-break: break-all; }
.badge { display: inline-block; font-size: 0.72rem; font-weight: 700; padding: 2px 8px; border-radius: 99px; white-space: nowrap; text-transform: uppercase; letter-spacing: 0.03em; }
.badge.critical { background: color-mix(in srgb, var(--critical) 14%, transparent); color: var(--critical); }
.badge.warning { background: color-mix(in srgb, var(--warning) 16%, transparent); color: var(--warning); }
.badge.info { background: color-mix(in srgb, var(--info) 14%, transparent); color: var(--info); }
.passed summary, details.card > summary { cursor: pointer; font-weight: 600; }
.roadmap-group h3 { margin-top: 12px; }
.ai-box { border-color: color-mix(in srgb, var(--primary) 40%, var(--border)); }
.error-card { text-align: center; margin-top: 48px; }

/* Tools */
.outline { list-style: none; padding: 0; }
.outline li { margin: 4px 0; }
.outline .lvl2 { padding-left: 20px; } .outline .lvl3 { padding-left: 40px; } .outline .lvl4 { padding-left: 60px; } .outline .lvl5, .outline .lvl6 { padding-left: 80px; }
.social-card { border: 1px solid var(--border); border-radius: 12px; overflow: hidden; max-width: 520px; }
.social-card img, .social-placeholder { width: 100%; aspect-ratio: 1200 / 630; object-fit: cover; display: block; background: var(--bg); }
.social-placeholder { display: flex; align-items: center; justify-content: center; color: var(--muted); }
.social-text { padding: 12px; display: flex; flex-direction: column; }

@media (max-width: 720px) {
  .hero { padding: 40px 0 24px; }
  .score-panel { grid-template-columns: 1fr; }
  .nav { padding-top: 8px; padding-bottom: 8px; }
  .nav nav { gap: 12px; }
  .audit-form button { width: 100%; }
}

@media print {
  .site-header, .site-footer, .no-print, .audit-form { display: none !important; }
  body { background: #fff; color: #000; }
  .card, .issue { box-shadow: none; break-inside: avoid; }
  details > *:not(summary) { display: block !important; }
  .issue-body { display: block; }
  a { color: #000; }
}

/* Ad banner on the report page (only rendered when AdSense is configured). */
.ad-slot { margin: 24px 0; min-height: 100px; text-align: center; overflow: hidden; }
.ad-label { display: block; font-size: 0.7rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted, #888); margin-bottom: 4px; }
/* No empty box when Google has no ad to show. */
.ad-slot:has(ins[data-ad-status="unfilled"]) { display: none; }
@media print { .ad-slot { display: none; } }