.quiz-page { width: min(900px, calc(100% - 2rem)); margin: 0 auto; padding: clamp(2rem, 5vw, 4.5rem) 0 5rem; }
.quiz-page h1 { font-size: clamp(2.4rem, 7vw, 4.5rem); line-height: .95; margin: .25rem 0 1.5rem; }
.quiz-page h2 { margin-top: 2.5rem; }
.quiz-introduction { max-width: 720px; margin: 0 auto; font-size: 1.1rem; }
.quiz-start-actions, .quiz-dialog form > div { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.75rem; }
.quiz-page button, .quiz-dialog button { border: 1px solid color-mix(in srgb, currentColor 25%, transparent); border-radius: .45rem; background: transparent; color: inherit; padding: .7rem 1rem; font: inherit; font-weight: 600; cursor: pointer; }
.quiz-page button:hover, .quiz-dialog button:hover { background: color-mix(in srgb, currentColor 7%, transparent); }
.quiz-primary-button { border-color: transparent !important; background: var(--accent, #a5422d) !important; color: white !important; }
.resume-notice { border-left: .3rem solid var(--accent, #a5422d); margin-top: 1.5rem; padding: .7rem 1rem; background: color-mix(in srgb, var(--accent, #a5422d) 8%, transparent); }
.resume-notice span { display: block; }
.quiz-attempt-header { display: flex; align-items: end; justify-content: space-between; gap: 2rem; border-bottom: 1px solid color-mix(in srgb, currentColor 18%, transparent); }
.quiz-attempt-header h1 { margin-bottom: 1rem; }
.quiz-timer { text-align: right; padding-bottom: 1.15rem; font-variant-numeric: tabular-nums; }
.quiz-timer span { display: block; color: color-mix(in srgb, currentColor 65%, transparent); font-size: .82rem; text-transform: uppercase; letter-spacing: .08em; }
.quiz-timer strong { font-size: 1.5rem; }
.quiz-progress { position: sticky; top: 0; z-index: 4; margin: 0; padding: .65rem 0; background: var(--page-background, var(--background, #fff)); font-size: .9rem; font-weight: 600; }
.quiz-question-list, .quiz-review-list { list-style: none; margin: 0; padding: 0; counter-reset: quiz-question; }
.quiz-question { counter-increment: quiz-question; display: grid; grid-template-columns: 2.4rem minmax(0, 1fr); gap: .5rem; padding: 1.6rem 0; border-bottom: 1px solid color-mix(in srgb, currentColor 13%, transparent); }
.quiz-question::before { content: counter(quiz-question) "."; font-size: 1.25rem; font-weight: 700; }
.quiz-question-content p { margin: 0 0 .85rem; }
.quiz-question-content .math-display { overflow-x: auto; font-size: 1.12rem; }
.quiz-answer-row { display: flex; align-items: center; flex-wrap: wrap; gap: .6rem; }
.quiz-answer-row label { font-weight: 600; }
.quiz-answer-prefix { display: inline-flex; align-items: center; font-size: 1.1rem; }
.quiz-answer-suffix { white-space: nowrap; }
.quiz-answer { min-width: min(100%, 18rem); border: 1px solid color-mix(in srgb, currentColor 28%, transparent); border-radius: .35rem; background: color-mix(in srgb, currentColor 3%, transparent); color: inherit; padding: .65rem .75rem; font: inherit; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.quiz-answer:focus { outline: .15rem solid color-mix(in srgb, var(--accent, #a5422d) 55%, transparent); outline-offset: .1rem; }
.quiz-math-input { display: inline-flex; min-width: min(100%, 18rem); vertical-align: middle; }
.quiz-math-input .mathquill-response-field { box-sizing: border-box; width: 100%; min-height: 2.8rem; padding: .55rem .7rem; border: 1px solid color-mix(in srgb, currentColor 28%, transparent); border-radius: .35rem; background: color-mix(in srgb, currentColor 3%, transparent); }
.quiz-math-input .mathquill-response-field.mq-focused { outline: .15rem solid color-mix(in srgb, var(--accent, #a5422d) 55%, transparent); outline-offset: .1rem; }
.quiz-choice-list { display: grid; gap: .45rem; border: 0; padding: 0; margin: 0; }
.quiz-choice-list label { display: flex; align-items: center; gap: .55rem; }
.answer-direction { color: color-mix(in srgb, currentColor 68%, transparent); font-size: .92rem; }
.quiz-submit-panel { margin-top: 2rem; padding: 1.4rem; text-align: center; background: color-mix(in srgb, currentColor 5%, transparent); border-radius: .5rem; }
.quiz-result-summary { max-width: 660px; margin: -.25rem 0 2rem; font-size: clamp(1.15rem, 2vw, 1.35rem); line-height: 1.65; }
.quiz-result-summary strong { font-weight: 750; }
.quiz-receipt { display: grid; grid-template-columns: 1fr auto; gap: .5rem; max-width: 720px; }
.quiz-receipt label, .quiz-receipt textarea { grid-column: 1 / -1; }
.quiz-receipt textarea { resize: none; overflow-wrap: anywhere; border: 1px solid color-mix(in srgb, currentColor 25%, transparent); border-radius: .35rem; padding: .7rem; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.quiz-review-item { display: grid; grid-template-columns: 2.4rem minmax(0, 1fr); gap: .5rem; padding: 1.25rem 0; border-bottom: 1px solid color-mix(in srgb, currentColor 13%, transparent); counter-increment: quiz-question; }
.quiz-review-item::before { content: counter(quiz-question) "."; font-weight: 700; }
.quiz-review-item.is-correct::before, .quiz-review-item.is-incorrect::before { content: counter(quiz-question) "."; color: inherit; font-size: 1rem; }
.quiz-review-status { display: inline-block; margin-bottom: .45rem; font-weight: 700; }
.is-correct .quiz-review-status { color: #237a42; }
.is-incorrect .quiz-review-status { color: #b3312d; }
.quiz-review-item p { margin: 0 0 .5rem; }
.quiz-review-answer { font-size: .95rem; }
.quiz-review-answer strong { display: inline-block; min-width: 7rem; }
.quiz-worked-solution { margin-top: 1rem; padding: .85rem 1rem; border-left: .25rem solid color-mix(in srgb, var(--accent, #a5422d) 60%, transparent); background: color-mix(in srgb, currentColor 4%, transparent); }
.quiz-misconception { margin-top: .85rem; padding: .75rem 1rem; border-radius: .4rem; background: color-mix(in srgb, #d88a1f 14%, transparent); }
.quiz-misconception strong { color: color-mix(in srgb, #b96b00 80%, currentColor); }
.quiz-misconception p { margin: .25rem 0 0; }
.quiz-solution-unavailable { margin-top: .85rem !important; padding: .75rem 1rem; border-left: .25rem solid color-mix(in srgb, currentColor 30%, transparent); color: color-mix(in srgb, currentColor 72%, transparent); font-style: italic; }
.quiz-worked-solution h3 { margin: 0 0 .55rem; font-size: 1rem; }
.quiz-worked-solution summary { cursor: pointer; font-weight: 700; }
.quiz-worked-solution p { margin: .7rem 0; }
.quiz-solution-calculation { margin: .8rem 0; overflow-x: auto; }
.quiz-dialog { max-width: 30rem; border: 0; border-radius: .6rem; padding: 1.5rem; color: inherit; background: var(--page-background, #fff); box-shadow: 0 1rem 4rem rgb(0 0 0 / .25); }
.quiz-dialog::backdrop { background: rgb(0 0 0 / .45); }
@media (max-width: 560px) { .quiz-attempt-header { align-items: start; } .quiz-timer { padding-top: .5rem; } .quiz-question { grid-template-columns: 1.8rem minmax(0, 1fr); } }