:root { --ink: #102537; --soft: #405463; --accent: #9b4719; --paper: #f7f9f8; --line: #cfdbd8; --white: #fff; --success: #1f6c4b; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.65 Inter, ui-sans-serif, system-ui, sans-serif; }
button, select { font: inherit; }
a { color: var(--accent); text-underline-offset: 3px; }
button:focus-visible, a:focus-visible, select:focus-visible, input:focus-visible { outline: 3px solid #e59a61; outline-offset: 3px; }
.skip-link { position: fixed; top: -5rem; left: 1rem; z-index: 5; background: var(--white); padding: .7rem 1rem; }
.skip-link:focus { top: 1rem; }
header, main { max-width: 980px; margin: auto; padding: 2rem 1.2rem; }
header { max-width: none; padding-block: 2rem 4rem; background: radial-gradient(circle at 90% 10%, #f4dfcf 0, transparent 35%), linear-gradient(125deg, #e8f0eb, #fff 70%); border-bottom: 1px solid var(--line); }
header > * { max-width: 980px; margin-left: auto; margin-right: auto; }
.brand { display: flex; align-items: center; gap: .7rem; color: var(--ink); font-weight: 800; text-decoration: none; }
.brand img, footer img { width: 44px; height: 44px; object-fit: contain; }
.eyebrow { margin: 2.5rem 0 .4rem; color: var(--accent); font-size: .78rem; font-weight: 800; letter-spacing: .09em; text-transform: uppercase; }
h1 { max-width: 800px; margin-top: 0; font-size: clamp(2.4rem, 6vw, 4.6rem); line-height: 1; letter-spacing: -.045em; }
header > p:last-child { max-width: 760px; margin-left: auto; margin-right: auto; color: var(--soft); font-size: 1.12rem; }
h2 { margin: 0; font-size: clamp(1.6rem, 4vw, 2.3rem); }
.builder { margin-top: 2rem; border: 1px solid var(--line); border-radius: 18px; background: var(--white); padding: 1.3rem; box-shadow: 0 12px 36px rgb(16 37 55 / 7%); }
.builder .eyebrow, .quiz-heading .eyebrow { margin-top: 0; }
.filters { display: grid; grid-template-columns: 1fr 2fr 1fr auto; align-items: end; gap: .8rem; margin-top: 1.2rem; }
label { font-weight: 700; }
select { display: block; width: 100%; min-height: 46px; margin-top: .3rem; border: 1px solid var(--line); border-radius: 10px; background: var(--white); color: var(--ink); padding: .6rem .7rem; }
button { min-height: 46px; border: 1px solid var(--line); border-radius: 999px; background: var(--white); color: var(--ink); cursor: pointer; padding: .65rem 1rem; font-weight: 800; }
button:hover { border-color: var(--accent); }
.primary { border-color: var(--ink); background: var(--ink); color: var(--white); }
#bank-summary { margin-bottom: 0; color: var(--soft); }
.quiz-heading { display: flex; justify-content: space-between; align-items: end; gap: 1rem; margin: 4rem 0 1rem; }
#best-score { color: var(--soft); font-size: .9rem; }
.question { margin: 1rem 0; border: 1px solid var(--line); border-radius: 16px; background: var(--white); padding: 1.2rem; }
.question legend { float: left; width: 100%; margin-bottom: .3rem; font-size: 1.06rem; font-weight: 800; line-height: 1.4; }
.question legend + * { clear: both; }
.question legend span { display: inline-grid; place-items: center; width: 2rem; height: 2rem; margin-right: .55rem; border-radius: 50%; background: #e8f0eb; font-size: .85rem; }
.question-meta { margin: .1rem 0 1rem; color: var(--accent); font-size: .78rem; font-weight: 800; text-transform: uppercase; }
.question label { display: flex; align-items: flex-start; gap: .65rem; margin: .55rem 0; border: 1px solid var(--line); border-radius: 10px; padding: .75rem; cursor: pointer; }
.question label:has(input:checked) { border-color: var(--accent); background: #fff8f2; }
.question input { margin-top: .35rem; accent-color: var(--accent); }
.question label.correct-option { border-color: var(--success); background: #f0faf5; }
.question label.incorrect-option { border-color: var(--accent); background: #fff1e8; }
.explanation { margin: 1rem 0 0; border-left: 4px solid transparent; padding-left: .8rem; }
.explanation.correct { border-color: var(--success); color: var(--success); }
.explanation.review { border-color: var(--accent); color: #78340f; }
.quiz-actions { display: flex; flex-wrap: wrap; gap: .7rem; margin: 1.5rem 0; }
.result { border-radius: 18px; background: var(--ink); color: var(--white); padding: 1.4rem; }
.result .score { margin: 0; color: #f3bb8d; font-size: 2rem; font-weight: 900; }
.result h2 { margin-top: .2rem; }
.result li { margin: .3rem 0; }
footer { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 1rem; margin-top: 4rem; background: var(--ink); color: var(--white); padding: 2rem 1.2rem; text-align: center; }
footer a { color: var(--white); }

@media (max-width: 760px) {
  .filters { grid-template-columns: 1fr; }
  .quiz-heading { align-items: start; flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; } }