/* Design language: Google product sites (Google Skills, Material Design 3).
   White canvas, strong type hierarchy, 8px grid, pill buttons, 16px cards, one accent. */
:root {
  --blue: #1a73e8; --blue-dark: #174ea6; --blue-tint: #e8f0fe; --blue-tint-2: #d2e3fc;
  --green: #188038; --green-tint: #e6f4ea; --red: #d93025; --red-tint: #fce8e6; --amber: #e37400; --amber-tint: #fef7e0;
  --ink: #202124; --ink-2: #3c4043; --ink-3: #5f6368; --line: #dadce0; --line-2: #e8eaed; --surface: #f8f9fa; --white: #fff;
  --font: "Google Sans Text", "Google Sans", Roboto, system-ui, -apple-system, "Segoe UI", sans-serif;
  --display: "Google Sans", "Google Sans Text", Roboto, system-ui, sans-serif;
  --mono: "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --r: 16px; --r-sm: 8px; --shadow: 0 1px 2px rgba(60,64,67,.3), 0 1px 3px 1px rgba(60,64,67,.15);
  --shadow-hover: 0 1px 3px rgba(60,64,67,.3), 0 4px 8px 3px rgba(60,64,67,.15);
  --max: 1200px; --gutter: 24px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; font-family: var(--font); color: var(--ink); background: var(--white); line-height: 1.6; font-size: 16px; -webkit-font-smoothing: antialiased; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { vertical-align: middle; }
code, pre { font-family: var(--mono); font-size: .9em; }
pre { background: var(--surface); border: 1px solid var(--line-2); border-radius: var(--r-sm); padding: 12px 16px; overflow: auto; white-space: pre-wrap; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.skip { position: absolute; left: -9999px; top: 8px; background: var(--white); padding: 8px 12px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }
.muted { color: var(--ink-3); }
.small { font-size: 14px; }
.center { text-align: center; }

/* Type scale (Material 3) */
h1, h2, h3, h4 { font-family: var(--display); font-weight: 500; letter-spacing: -0.01em; margin: 0 0 8px; line-height: 1.2; color: var(--ink); }
h1 { font-size: 44px; font-weight: 500; letter-spacing: -0.02em; }
h2 { font-size: 32px; }
h3 { font-size: 22px; }
h4 { font-size: 18px; }
.eyebrow { font-size: 14px; font-weight: 500; color: var(--blue); text-transform: none; letter-spacing: .01em; margin-bottom: 8px; display: block; }
.lead { font-size: 18px; color: var(--ink-2); line-height: 1.6; }
@media (max-width: 720px) { h1 { font-size: 34px; } h2 { font-size: 26px; } .lead { font-size: 17px; } :root { --gutter: 16px; } }

/* Header */
.top { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.96); backdrop-filter: saturate(180%) blur(8px); border-bottom: 1px solid var(--line-2); }
.top-inner { height: 64px; display: flex; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-family: var(--display); font-size: 20px; font-weight: 500; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand.small { font-size: 18px; margin-bottom: 8px; }
.nav { display: flex; gap: 4px; margin-left: 8px; }
.nav a { color: var(--ink-2); padding: 8px 12px; border-radius: 20px; font-weight: 500; font-size: 15px; }
.nav a:hover { background: var(--surface); text-decoration: none; color: var(--ink); }
.top-actions { margin-left: auto; display: flex; gap: 8px; align-items: center; }
@media (max-width: 720px) { .nav { display: none; } }

/* Buttons (Material filled / tonal / text, pill) */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 40px; padding: 0 24px; border-radius: 20px; font-family: var(--font); font-weight: 500; font-size: 15px; border: 1px solid transparent; cursor: pointer; white-space: nowrap; transition: box-shadow .15s, background .15s; text-decoration: none; }
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dark); box-shadow: var(--shadow); }
.btn-tonal { background: var(--blue-tint); color: var(--blue-dark); }
.btn-tonal:hover { background: var(--blue-tint-2); }
.btn-outline { background: #fff; color: var(--blue); border-color: var(--line); }
.btn-outline:hover { background: var(--blue-tint); }
.btn-text { background: transparent; color: var(--blue); padding: 0 12px; }
.btn-text:hover { background: var(--blue-tint); }
.btn-lg { height: 48px; padding: 0 32px; font-size: 16px; border-radius: 24px; }
.btn[disabled], .btn.disabled { opacity: .5; pointer-events: none; }
.btn-danger { background: var(--red); color: #fff; }

/* Hero */
.hero { padding: 72px 0 48px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.hero h1 { margin-bottom: 16px; }
.hero .actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.hero .proof { display: flex; gap: 24px; flex-wrap: wrap; margin-top: 28px; color: var(--ink-3); font-size: 14px; }
.hero .proof span { display: inline-flex; gap: 8px; align-items: center; }
.hero .proof svg { color: var(--green); }
@media (max-width: 900px) { .hero { padding: 40px 0 24px; } .hero-grid { grid-template-columns: 1fr; gap: 32px; } }

/* Sample question card in hero */
.sample { background: var(--white); border: 1px solid var(--line); border-radius: var(--r); box-shadow: var(--shadow); padding: 24px; }
.sample .tag { display: inline-block; font-size: 12px; font-weight: 500; color: var(--blue-dark); background: var(--blue-tint); padding: 4px 10px; border-radius: 12px; margin-bottom: 12px; }
.sample .scenario { font-size: 15px; color: var(--ink-2); margin: 0 0 12px; }
.sample .q { font-weight: 500; margin: 0 0 12px; }
.sample ol { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.sample li { border: 1px solid var(--line); border-radius: var(--r-sm); padding: 10px 12px; font-size: 15px; display: flex; gap: 10px; }
.sample li b { color: var(--ink-3); font-weight: 500; min-width: 18px; }
.sample li .exp { display: block; font-size: 13px; color: var(--ink-3); margin-top: 4px; }
.sample li.ok { border-color: var(--green); background: var(--green-tint); }
.sample .why { margin-top: 14px; font-size: 14px; color: var(--ink-2); border-top: 1px solid var(--line-2); padding-top: 12px; }

/* Sections */
.section { padding: 56px 0; }
.section.alt { background: var(--surface); }
.section-head { max-width: 720px; margin-bottom: 32px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
@media (max-width: 900px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }

/* Cards */
.card { background: var(--white); border: 1px solid var(--line); border-radius: var(--r); padding: 24px; transition: box-shadow .15s; }
.card.link:hover { box-shadow: var(--shadow-hover); text-decoration: none; }
a.card { color: inherit; display: block; }
.card .icon { width: 48px; height: 48px; border-radius: 12px; background: var(--blue-tint); display: grid; place-items: center; color: var(--blue); margin-bottom: 16px; }
.card h3 { margin-bottom: 6px; }
.card p { margin: 0; color: var(--ink-2); }
.card .meta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 16px; font-size: 13px; color: var(--ink-3); }
.chip { display: inline-flex; align-items: center; gap: 6px; height: 32px; padding: 0 12px; border: 1px solid var(--line); border-radius: 8px; font-size: 14px; color: var(--ink-2); background: #fff; }
.chip.on { background: var(--blue-tint); border-color: var(--blue-tint); color: var(--blue-dark); }
.chips { display: flex; gap: 8px; flex-wrap: wrap; }

/* Stats */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.stat { border-left: 4px solid var(--blue); padding-left: 16px; }
.stat b { display: block; font-family: var(--display); font-size: 40px; font-weight: 500; color: var(--ink); line-height: 1.1; }
.stat span { color: var(--ink-3); }
@media (max-width: 720px) { .stats { grid-template-columns: 1fr; } }

/* Objective table */
.domains { display: grid; gap: 16px; }
.domain { border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; }
.domain-head { display: flex; justify-content: space-between; align-items: center; padding: 16px 20px; background: var(--surface); gap: 12px; }
.domain-head h3 { margin: 0; font-size: 18px; }
.domain-head .w { font-size: 13px; color: var(--ink-3); font-weight: 500; white-space: nowrap; }
.domain ul { list-style: none; margin: 0; padding: 8px 0; }
.domain li { padding: 10px 20px; display: flex; justify-content: space-between; gap: 16px; border-top: 1px solid var(--line-2); }
.domain li:first-child { border-top: 0; }
.domain li .n { color: var(--ink-3); font-size: 13px; white-space: nowrap; }

/* Pricing */
.price-card { border: 1px solid var(--line); border-radius: var(--r); padding: 32px; background: #fff; position: relative; }
.price-card.featured { border: 2px solid var(--blue); }
.price-card .badge { position: absolute; top: -12px; left: 24px; background: var(--blue); color: #fff; font-size: 12px; font-weight: 500; padding: 4px 12px; border-radius: 12px; }
.price { font-family: var(--display); font-size: 44px; font-weight: 500; margin: 8px 0; }
.price small { font-size: 16px; color: var(--ink-3); font-weight: 400; }
.price-card ul { list-style: none; padding: 0; margin: 16px 0 24px; display: grid; gap: 10px; }
.price-card li { display: flex; gap: 10px; align-items: flex-start; color: var(--ink-2); }
.price-card li svg { flex: none; color: var(--green); margin-top: 3px; }

/* Forms */
.field { display: grid; gap: 6px; margin-bottom: 16px; }
.field label { font-size: 14px; font-weight: 500; color: var(--ink-2); }
.input { height: 48px; border: 1px solid var(--line); border-radius: var(--r-sm); padding: 0 14px; font: inherit; font-size: 16px; width: 100%; background: #fff; color: var(--ink); }
.input:focus { outline: 2px solid var(--blue); outline-offset: -1px; border-color: var(--blue); }
.form-row { display: flex; gap: 8px; }
.form-row .input { flex: 1; }
.notice { border-radius: var(--r-sm); padding: 12px 16px; margin: 16px 0; font-size: 15px; }
.notice.ok { background: var(--green-tint); color: #0d652d; }
.notice.err { background: var(--red-tint); color: #a50e0e; }
.notice.info { background: var(--blue-tint); color: var(--blue-dark); }

/* Narrow prose pages */
.prose { max-width: 760px; }
.prose h2 { font-size: 24px; margin-top: 40px; }
.prose h3 { font-size: 19px; margin-top: 24px; }
.prose p, .prose li { color: var(--ink-2); }
.prose ul { padding-left: 22px; }
.page-head { padding: 48px 0 24px; }
.page-head h1 { margin-bottom: 8px; }

/* Quiz runner */
.quiz { max-width: 880px; }
.quiz-bar { position: sticky; top: 64px; z-index: 40; background: #fff; border-bottom: 1px solid var(--line-2); padding: 12px 0; margin-bottom: 24px; }
.quiz-bar-inner { display: flex; align-items: center; gap: 16px; }
.quiz-bar .progress { flex: 1; height: 6px; background: var(--line-2); border-radius: 3px; overflow: hidden; }
.quiz-bar .progress i { display: block; height: 100%; background: var(--blue); width: 0; transition: width .2s; }
.quiz-bar .count, .quiz-bar .timer { font-size: 14px; color: var(--ink-3); font-variant-numeric: tabular-nums; white-space: nowrap; }
.q-card { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 28px; }
.q-card .q-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.q-card .q-meta span { font-size: 12px; font-weight: 500; padding: 4px 10px; border-radius: 12px; background: var(--surface); color: var(--ink-3); }
.q-card .scenario { font-size: 16px; color: var(--ink-2); white-space: pre-wrap; margin: 0 0 16px; }
.q-card .question { font-size: 18px; font-weight: 500; margin: 0 0 20px; }
.opts { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.opt { display: flex; gap: 12px; align-items: flex-start; border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; cursor: pointer; background: #fff; transition: background .1s, border-color .1s; }
.opt:hover { background: var(--surface); }
.opt input { margin-top: 4px; accent-color: var(--blue); width: 18px; height: 18px; flex: none; }
.opt .k { font-weight: 500; color: var(--ink-3); min-width: 18px; }
.opt.sel { border-color: var(--blue); background: var(--blue-tint); }
.opt.right { border-color: var(--green); background: var(--green-tint); }
.opt.wrong { border-color: var(--red); background: var(--red-tint); }
.opt .exp { display: block; font-size: 14px; color: var(--ink-2); margin-top: 6px; }
.q-actions { display: flex; gap: 12px; margin-top: 24px; align-items: center; flex-wrap: wrap; }
.q-actions .spacer { flex: 1; }
.flag { color: var(--ink-3); }
.flag.on { color: var(--amber); }
.explain { margin-top: 20px; border-top: 1px solid var(--line-2); padding-top: 16px; }
.explain h4 { margin-bottom: 6px; }
.explain p { color: var(--ink-2); margin: 0 0 8px; }
.explain .refs a { display: block; font-size: 14px; }

/* Results */
.score-hero { display: grid; grid-template-columns: 220px 1fr; gap: 32px; align-items: center; padding: 32px; border: 1px solid var(--line); border-radius: var(--r); }
.ring { width: 200px; height: 200px; }
.ring text { font-family: var(--display); }
.score-hero .verdict { font-family: var(--display); font-size: 28px; font-weight: 500; }
.score-hero .verdict.pass { color: var(--green); }
.score-hero .verdict.fail { color: var(--red); }
@media (max-width: 720px) { .score-hero { grid-template-columns: 1fr; text-align: center; justify-items: center; } }
.bars { display: grid; gap: 12px; margin-top: 24px; }
.bar { display: grid; grid-template-columns: 1fr 180px 60px; gap: 12px; align-items: center; font-size: 15px; }
.bar .track { height: 8px; background: var(--line-2); border-radius: 4px; overflow: hidden; }
.bar .track i { display: block; height: 100%; background: var(--blue); }
.bar .track i.low { background: var(--red); }
.bar .track i.mid { background: var(--amber); }
.bar .pct { text-align: right; font-variant-numeric: tabular-nums; color: var(--ink-3); }
@media (max-width: 720px) { .bar { grid-template-columns: 1fr 50px; } .bar .track { grid-column: 1 / -1; } }
.review-list { display: grid; gap: 16px; margin-top: 24px; }

/* Account */
.table { width: 100%; border-collapse: collapse; font-size: 15px; }
.table th, .table td { text-align: left; padding: 12px 8px; border-bottom: 1px solid var(--line-2); }
.table th { color: var(--ink-3); font-weight: 500; font-size: 13px; }

/* Footer */
.foot { border-top: 1px solid var(--line-2); margin-top: 64px; padding: 40px 0; background: var(--surface); }
.foot-inner { display: grid; grid-template-columns: 1.4fr 1fr; gap: 32px; }
.foot p { font-size: 13px; max-width: 520px; }
.foot nav { display: flex; flex-wrap: wrap; gap: 8px 20px; align-content: start; }
.foot nav a { color: var(--ink-2); font-size: 14px; }
@media (max-width: 720px) { .foot-inner { grid-template-columns: 1fr; } }

/* Utilities */
.mt-0 { margin-top: 0; } .mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; } .mt-32 { margin-top: 32px; } .mb-24 { margin-bottom: 24px; }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.hidden { display: none !important; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

@media (max-width: 720px) { .top-actions .btn-primary { display: none; } }