[hidden] { display: none !important; }
:root {
  --bg: #f5f7fb; --surface: #fff; --surface-2: #f0f3f9; --text: #141b2b; --muted: #586378; --border: #dfe4ec;
  --primary: #2457d6; --primary-strong: #1a44b0; --primary-text: #fff; --primary-soft: #e8eefc; --accent: #d9480f;
  --ok: #1d7f4e; --ok-bg: #e4f5eb; --bad: #c0362c; --bad-bg: #fbeae8; --flag: #b7791f;
  --radius: 12px; --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(16,24,40,.05), 0 1px 3px rgba(16,24,40,.07);
  --shadow-lg: 0 10px 30px -12px rgba(16,24,40,.25);
  --hero: radial-gradient(1200px 400px at 50% -120px, #dbe5ff 0%, rgba(219,229,255,0) 70%);
  --vendor: var(--primary);
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f131a; --surface: #171d27; --surface-2: #1d2531; --text: #e7eaf0; --muted: #9ba6b6; --border: #2a3342;
    --primary: #6b96ff; --primary-strong: #8aaeff; --primary-text: #0b1020; --primary-soft: #1c2944; --accent: #ff8a3d;
    --ok: #4cc38a; --ok-bg: #15301f; --bad: #ff6b5f; --bad-bg: #3a1d1b; --flag: #e0a43a;
    --shadow: none; --shadow-lg: 0 10px 30px -12px rgba(0,0,0,.6);
    --hero: radial-gradient(1200px 400px at 50% -120px, #1b2847 0%, rgba(27,40,71,0) 70%);
  }
}
/* Vendor accent colours for cards and certification headers. */
.v-comptia { --vendor: #c8102e; }
.v-cisco { --vendor: #0a7cc1; }
.v-aws, .v-amazon-web-services { --vendor: #e17a00; }
.v-microsoft { --vendor: #0f7b4a; }
.v-fortinet { --vendor: #b3261e; }
.v-red-hat { --vendor: #8a0000; }
@media (prefers-color-scheme: dark) {
  .v-comptia { --vendor: #ff5d73; }
  .v-cisco { --vendor: #49b3f0; }
  .v-aws, .v-amazon-web-services { --vendor: #ffa53d; }
  .v-microsoft { --vendor: #4fcf8e; }
  .v-fortinet { --vendor: #ff8a7a; }
  .v-red-hat { --vendor: #ff5c5c; }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg) var(--hero) no-repeat; color: var(--text); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif; -webkit-font-smoothing: antialiased; }
a { color: var(--primary); text-underline-offset: 2px; }
a:hover { color: var(--primary-strong); }
:focus-visible { outline: 3px solid color-mix(in srgb, var(--primary) 60%, transparent); outline-offset: 2px; border-radius: 4px; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .9em; background: var(--surface-2); border: 1px solid var(--border); padding: .05em .35em; border-radius: 4px; }
h1, h2, h3 { line-height: 1.2; letter-spacing: -.01em; }
h1 { font-size: clamp(1.6rem, 3.5vw, 2.2rem); }
h2 { font-size: 1.3rem; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
.muted { color: var(--muted); font-size: .92em; }
.center { text-align: center; }
.lead { font-size: 1.08rem; color: var(--muted); }
.skip-link { position: absolute; left: 8px; top: -48px; z-index: 10; background: var(--primary); color: var(--primary-text); padding: 8px 14px; border-radius: var(--radius-sm); text-decoration: none; }
.skip-link:focus { top: 8px; color: var(--primary-text); }

/* Header */
.site-header { position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--surface) 85%, transparent); backdrop-filter: saturate(1.5) blur(10px); -webkit-backdrop-filter: saturate(1.5) blur(10px); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 62px; gap: 12px; }
.logo { font-weight: 750; font-size: 1.15rem; text-decoration: none; color: var(--text); display: inline-flex; align-items: center; gap: 9px; letter-spacing: -.01em; }
.logo:hover { color: var(--text); }
.logo-mark { width: 30px; height: 30px; flex: none; }
.logo-mark rect { fill: var(--primary); }
.logo-dim { color: var(--muted); font-weight: 500; }
.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav > a:not(.btn) { text-decoration: none; color: var(--text); padding: 6px 10px; border-radius: var(--radius-sm); font-weight: 500; }
.site-nav > a:not(.btn):hover { background: var(--surface-2); }
.site-nav > a[aria-current="page"]:not(.btn) { color: var(--primary); }
.site-nav .btn { margin-left: 6px; }
.supporter-badge { color: var(--accent) !important; font-weight: 600; }
@media (max-width: 480px) { .hide-sm { display: none; } .logo-dim { display: none; } }

main.wrap { padding-top: 28px; padding-bottom: 56px; min-height: 60vh; }
main.with-sidebar { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 28px; align-items: start; }
@media (max-width: 900px) { main.with-sidebar { grid-template-columns: 1fr; } }
.sidebar { position: sticky; top: 80px; }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; margin: 0 0 16px; box-shadow: var(--shadow); }
.card.narrow { max-width: 720px; margin-left: auto; margin-right: auto; }
.card > h2:first-child, .card > div > h2:first-child { margin-top: 0; }
.alert { background: var(--bad-bg); color: var(--bad); padding: 10px 14px; border-radius: var(--radius-sm); }
.exam-note { border-left: 4px solid var(--flag); }
.alert.ok { background: var(--ok-bg); color: var(--ok); }
.badge { display: inline-block; font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--primary); background: var(--primary-soft); padding: 3px 8px; border-radius: 999px; margin-bottom: 8px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 9px 16px; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--surface); color: var(--text); font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; transition: background-color .15s, border-color .15s, transform .05s; }
.btn:hover:not([disabled]) { border-color: var(--primary); color: var(--text); }
.btn:active:not([disabled]) { transform: translateY(1px); }
.btn[disabled] { opacity: .45; cursor: default; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: var(--primary-text); }
.btn-primary:hover:not([disabled]) { background: var(--primary-strong); border-color: var(--primary-strong); color: var(--primary-text); }
.btn-accent { background: var(--accent); border-color: var(--accent); color: #fff !important; }
.btn-accent:hover:not([disabled]) { border-color: var(--accent); filter: brightness(1.08); }
.btn-small { padding: 5px 12px; font-size: .9rem; white-space: nowrap; }
.btn-large { padding: 13px 24px; font-size: 1.05rem; }
.btn-finish { margin-left: auto; }

/* Home */
.hero { text-align: center; padding: 28px 0 12px; }
.eyebrow { display: inline-block; margin: 0 0 12px; font-size: .8rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--primary); background: var(--primary-soft); padding: 4px 12px; border-radius: 999px; }
.hero h1 { font-size: clamp(1.9rem, 5vw, 3rem); margin: 0 0 12px; letter-spacing: -.025em; }
.hero .lead { max-width: 640px; margin: 0 auto 24px; }
.search-box { position: relative; max-width: 580px; margin: 0 auto; }
.search-box svg { position: absolute; left: 18px; top: 50%; width: 20px; height: 20px; transform: translateY(-50%); fill: none; stroke: var(--muted); stroke-width: 2; stroke-linecap: round; pointer-events: none; }
.search { width: 100%; padding: 14px 18px 14px 48px; font: inherit; font-size: 1.02rem; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); color: var(--text); box-shadow: var(--shadow-lg); }
.search:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary) 20%, transparent), var(--shadow-lg); }
.hero-stats { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px 28px; list-style: none; padding: 0; margin: 22px 0 0; color: var(--muted); font-size: .95rem; }
.hero-stats strong { color: var(--text); }

.vendor h2 { font-size: .9rem; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; margin: 40px 0 14px; }
.cert-vendor { font-size: .8rem; color: var(--muted); font-weight: 600; }
.cert-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 14px; }
.cert-card { position: relative; display: flex; flex-direction: column; gap: 6px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 18px 16px; text-decoration: none; color: var(--text); box-shadow: var(--shadow); overflow: hidden; transition: border-color .15s, transform .15s, box-shadow .15s; }
.cert-card::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 4px; background: var(--vendor); }
.cert-card:hover { color: var(--text); border-color: color-mix(in srgb, var(--vendor) 55%, var(--border)); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.cert-code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .8rem; color: var(--vendor); font-weight: 700; letter-spacing: .02em; }
.cert-code.big { font-size: .9rem; }
.cert-name { font-weight: 650; font-size: 1.08rem; line-height: 1.3; }
.cert-meta { display: flex; gap: 14px; color: var(--muted); font-size: .86rem; margin-top: auto; padding-top: 6px; }
.cert-go { font-size: .88rem; font-weight: 600; color: var(--primary); }
.recent { margin-top: 28px; }
.recent h2 { font-size: 1rem; }
.recent-list { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.recent-list li { background: var(--surface); border: 1px solid var(--border); border-radius: 999px; padding: 4px 6px 4px 14px; display: flex; gap: 8px; align-items: center; }
.pill { font-size: .78rem; padding: 2px 8px; border-radius: 999px; background: var(--surface-2); color: var(--text); font-weight: 600; }
.pill-pass { background: var(--ok-bg); color: var(--ok); }
.pill-fail { background: var(--bad-bg); color: var(--bad); }

.features { margin-top: 56px; }
.features > h2 { text-align: center; margin-bottom: 20px; }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.feature { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.feature h3 { margin: 12px 0 6px; font-size: 1.08rem; }
.feature p { margin: 0; color: var(--muted); }
.feature-icon { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 10px; background: var(--primary-soft); color: var(--primary); font-weight: 800; }

/* Certification page */
.crumbs { font-size: .9rem; color: var(--muted); margin-bottom: 14px; }
.crumbs a { color: var(--muted); }
.cert-head { margin-bottom: 20px; }
.cert-head h1 { margin: 6px 0 8px; }
.cert-head .lead { margin: 0 0 18px; max-width: 70ch; }
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; list-style: none; padding: 0; margin: 0; }
.facts li { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 12px 14px; display: flex; flex-direction: column; }
.facts strong { font-size: 1.4rem; line-height: 1.2; }
.facts span { color: var(--muted); font-size: .85rem; }
.full-exam { display: flex; gap: 16px 24px; align-items: center; justify-content: space-between; flex-wrap: wrap; border: 1px solid color-mix(in srgb, var(--primary) 45%, var(--border)); background: linear-gradient(135deg, var(--primary-soft), var(--surface) 70%); }
.full-exam h2 { margin: 0 0 6px; }
.full-exam p { margin: 0; color: var(--muted); max-width: 60ch; }
.start-form h2 { margin-top: 0; }
.start-form fieldset { border: 0; padding: 0; margin: 0 0 18px; min-width: 0; }
.start-form legend { font-weight: 600; margin-bottom: 8px; }
.modes { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
@media (max-width: 600px) { .modes { grid-template-columns: 1fr; } }
.mode { display: flex; gap: 10px; border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 12px 14px; cursor: pointer; transition: border-color .15s, background-color .15s; }
.mode:hover { border-color: var(--primary); }
.mode:has(input:checked) { border-color: var(--primary); background: var(--primary-soft); }
.mode input { accent-color: var(--primary); margin-top: 5px; }
.mode strong { display: block; }
.mode span { color: var(--muted); font-size: .92rem; }
.mode span strong { color: var(--text); }
.field { display: flex; flex-direction: column; gap: 6px; font-weight: 600; margin-bottom: 18px; max-width: 280px; }
.field select, .redeem input { font: inherit; padding: 9px 12px; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--surface); color: var(--text); }
.check { display: flex; gap: 8px; align-items: baseline; padding: 5px 0; cursor: pointer; }
.check input { accent-color: var(--primary); }
.check .muted { margin-left: auto; white-space: nowrap; }
@media (max-width: 600px) { .domains .check { flex-wrap: wrap; } .domains .check .muted { margin-left: 24px; width: 100%; } }
.weights { list-style: none; padding: 0; margin: 14px 0 0; display: grid; gap: 10px; }
.weights li { display: grid; grid-template-columns: minmax(0, 1fr) 30% 3.2em; gap: 12px; align-items: center; }
.weights .bar span { background: var(--vendor); }
.w-pct { text-align: right; font-weight: 600; font-variant-numeric: tabular-nums; }
@media (max-width: 600px) { .weights li { grid-template-columns: 1fr 3.2em; } .weights .bar { grid-column: 1 / -1; grid-row: 2; } }
.faq { margin-top: 28px; }
.faq details { padding: 0; }
.faq summary { cursor: pointer; padding: 16px 20px; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--muted); font-size: 1.3rem; line-height: 1; }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 0; padding: 0 20px 18px; color: var(--muted); }

/* Test */
.test-bar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; gap: 12px; }
.timer { font-family: ui-monospace, Menlo, monospace; font-size: 1.2rem; font-weight: 700; padding: 4px 12px; border-radius: var(--radius-sm); background: var(--surface); border: 1px solid var(--border); font-variant-numeric: tabular-nums; }
.timer.low { color: var(--bad); border-color: var(--bad); }
.progress { height: 6px; background: var(--border); border-radius: 999px; overflow: hidden; margin-bottom: 16px; }
.progress span, .bar span { display: block; height: 100%; background: var(--primary); border-radius: 999px; }
.q-head { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 10px; }
.q-num { font-weight: 600; }
.q-stem { font-size: 1.1rem; margin-bottom: 16px; }
.choices { display: flex; flex-direction: column; gap: 8px; }
.choice { display: flex; gap: 12px; align-items: flex-start; border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 13px 14px; cursor: pointer; transition: border-color .12s, background-color .12s; }
.choice:hover { border-color: var(--primary); }
.choice:has(input:focus-visible) { outline: 3px solid color-mix(in srgb, var(--primary) 60%, transparent); outline-offset: 2px; }
.choice input { margin-top: 5px; accent-color: var(--primary); }
.choice.selected, .choice:has(input:checked) { border-color: var(--primary); background: var(--primary-soft); }
.choice.correct { border-color: var(--ok); background: var(--ok-bg); }
.choice.wrong { border-color: var(--bad); background: var(--bad-bg); }
.choice-letter { font-weight: 700; color: var(--muted); min-width: 1.2em; }
.feedback { margin-top: 14px; padding: 12px 14px; border-radius: var(--radius-sm); border-left: 4px solid; }
.feedback.ok { background: var(--ok-bg); border-color: var(--ok); }
.feedback.bad { background: var(--bad-bg); border-color: var(--bad); }
.flag { margin-top: 12px; color: var(--muted); }
.q-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.q-grid { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--border); }
.q-dot { width: 36px; height: 36px; border-radius: 7px; border: 1px solid var(--border); background: var(--surface); color: var(--text); font: inherit; font-size: .82rem; cursor: pointer; }
.q-dot:hover { border-color: var(--primary); }
.q-dot.answered { background: color-mix(in srgb, var(--primary) 18%, var(--surface)); }
.q-dot.ok { background: var(--ok-bg); border-color: var(--ok); }
.q-dot.bad { background: var(--bad-bg); border-color: var(--bad); }
.q-dot.flagged { box-shadow: inset 0 -3px 0 var(--flag); }
.q-dot.current { outline: 2px solid var(--primary); outline-offset: 1px; }

/* Results */
.score { display: flex; gap: 24px; align-items: center; flex-wrap: wrap; }
.score-num { font-size: 3.4rem; font-weight: 800; letter-spacing: -.03em; font-variant-numeric: tabular-nums; }
.score.pass { border-top: 4px solid var(--ok); }
.score.fail { border-top: 4px solid var(--bad); }
.score.pass .score-num { color: var(--ok); }
.score.fail .score-num { color: var(--bad); }
.score h1 { margin: 0 0 6px; }
.inline { display: flex; gap: 8px; flex-wrap: wrap; }
.domain-table { width: 100%; border-collapse: collapse; }
.domain-table th { text-align: left; font-weight: 500; padding: 7px 12px 7px 0; }
.domain-table .bar-cell { width: 40%; }
.domain-table .num { text-align: right; white-space: nowrap; color: var(--muted); font-variant-numeric: tabular-nums; }
.bar { display: block; height: 8px; background: var(--border); border-radius: 999px; overflow: hidden; }
.review-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.review.only-wrong .is-right { display: none; }
.review-item.is-wrong { border-left: 4px solid var(--bad); }
.review-item.is-right { border-left: 4px solid var(--ok); }
.review-choices { list-style: none; padding: 0; margin: 0 0 12px; }
.review-choices li { padding: 5px 10px; border-radius: 6px; }
.review-choices li.correct { background: var(--ok-bg); color: var(--ok); }
.review-choices li.wrong { background: var(--bad-bg); color: var(--bad); }
.explanation { color: var(--muted); border-top: 1px dashed var(--border); padding-top: 10px; }

/* Static pages */
.prose { line-height: 1.7; }
.prose h1 { margin-top: 0; }
.prose h2 { margin-top: 1.8em; font-size: 1.2rem; }
.prose li { margin-bottom: 6px; }
.cols { columns: 2 260px; }
.error-page { text-align: center; padding: 40px 22px; }
.error-code { font-size: 4rem; font-weight: 800; margin: 0; color: var(--primary); letter-spacing: -.04em; line-height: 1; }
.steps li { margin-bottom: 4px; }
.redeem { display: flex; gap: 8px; flex-wrap: wrap; }
.redeem input { flex: 1; min-width: 200px; text-transform: uppercase; }

/* Ads */
.ad { margin: 16px 0; min-height: 90px; text-align: center; }
.ad-label { display: block; font-size: .72rem; color: var(--muted); margin-bottom: 4px; }
.ad-placeholder { display: grid; place-items: center; border: 2px dashed var(--border); border-radius: var(--radius); color: var(--muted); font-size: .9rem; }
.ad-sidebar.ad-placeholder { min-height: 250px; margin-top: 0; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); background: var(--surface); padding: 32px 0 36px; color: var(--muted); font-size: .9rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 24px 40px; }
.footer-brand .logo { font-size: 1.05rem; }
.footer-brand p { max-width: 46ch; margin: 8px 0 0; }
.site-footer h2 { font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; color: var(--text); margin: 0 0 8px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 4px; }
.site-footer nav a { color: var(--muted); text-decoration: none; }
.site-footer nav a:hover { color: var(--primary); text-decoration: underline; }
.footer-legal { grid-column: 1 / -1; margin: 0; padding-top: 18px; border-top: 1px solid var(--border); font-size: .82rem; }
@media (max-width: 600px) { .footer-grid { grid-template-columns: 1fr; } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; scroll-behavior: auto !important; }
}
@media print {
  .site-header, .site-footer, .ad, .sidebar, .q-actions, .q-grid, .review-head .check { display: none !important; }
  body { background: #fff; }
  .card { box-shadow: none; break-inside: avoid; }
}