:root {
    --smurdy-blue: #0077cc;
    --smurdy-blue-dark: #005fa3;
    --smurdy-text: #171717;
    --smurdy-muted: #626262;
    --smurdy-line: #dedede;
    --smurdy-soft: #f3f6f8;
    --smurdy-surface: #fff;
    --smurdy-correct: #137333;
    --smurdy-wrong: #b3261e;
    --smurdy-radius-sm: 8px;
    --smurdy-radius-md: 10px;
    --smurdy-radius-lg: 12px;
    --smurdy-shadow-panel: 0 8px 26px rgba(0, 0, 0, .10);

    /* Backwards-compatible aliases used by the existing flag game CSS. */
    --brand: var(--smurdy-blue);
    --brand-dark: var(--smurdy-blue-dark);
    --text: var(--smurdy-text);
    --muted: var(--smurdy-muted);
    --line: var(--smurdy-line);
    --soft: var(--smurdy-soft);
    --correct: var(--smurdy-correct);
    --wrong: var(--smurdy-wrong);
    --radius: var(--smurdy-radius-lg);
    --shadow: var(--smurdy-shadow-panel);
}

* { box-sizing: border-box; }

body[data-smurdy-quiz-page] {
    margin: 0;
    background: var(--smurdy-soft);
    color: var(--smurdy-text);
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    line-height: 1.6;
}

body[data-smurdy-quiz-page] a { color: var(--smurdy-blue-dark); }
body[data-smurdy-quiz-page] button,
body[data-smurdy-quiz-page] input { font: inherit; }
body[data-smurdy-quiz-page] [hidden] { display: none !important; }
body[data-smurdy-quiz-page] :is(a, button, input, summary):focus-visible {
    outline: 3px solid rgba(0, 119, 204, .28);
    outline-offset: 3px;
}

.quiz-brand,
.panel-brand,
.flag-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px max(18px, calc((100vw - 980px) / 2 + 18px));
    border-bottom: 1px solid rgba(0, 0, 0, .09);
    background: rgba(255, 255, 255, .96);
    color: inherit;
    font-size: 19px;
    font-weight: 750;
    letter-spacing: -.01em;
    text-decoration: none;
}

:is(.quiz-brand, .panel-brand, .flag-brand) img {
    width: 50px;
    height: 50px;
    object-fit: contain;
}

body[data-smurdy-quiz-page] .quiz-page,
body[data-smurdy-quiz-page] main {
    width: min(980px, calc(100% - 36px));
    max-width: 980px;
    margin: 24px auto 0;
    padding: 30px 32px 22px;
    border: 1px solid rgba(0, 0, 0, .09);
    border-radius: var(--smurdy-radius-lg);
    background: var(--smurdy-surface);
    box-shadow: var(--smurdy-shadow-panel);
}

.breadcrumbs {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 7px;
    margin: 0 0 22px;
    color: var(--smurdy-muted);
    font-size: 14px;
}

.breadcrumbs a { text-decoration: none; }
.breadcrumbs a:hover { text-decoration: underline; }

body[data-smurdy-quiz-page] h1 {
    margin: 0 0 8px;
    font-size: clamp(28px, 5vw, 42px);
    line-height: 1.15;
    letter-spacing: -.025em;
}

.quiz-meta,
.meta,
.flag-meta {
    margin-bottom: 12px;
    color: var(--smurdy-muted);
    font-size: 14px;
}

.quiz-lead,
.lead,
.flag-lead {
    margin: 0 0 24px;
    color: #292929;
    font-size: 18px;
}

.content-section,
.flag-info,
.examples,
.flag-examples {
    margin: 28px 0 0;
}

:is(.content-section, .flag-info, .examples, .flag-examples) h2,
:is(.quiz-links, .link-section, .flag-links) h2 {
    margin: 0 0 8px;
    font-size: 21px;
    line-height: 1.3;
}

:is(.content-section, .flag-info) p { margin: 0; }

.quiz-tip,
.tip,
.flag-tip {
    margin-top: 14px !important;
    padding: 13px 15px;
    border: 1px solid var(--smurdy-line);
    border-radius: var(--smurdy-radius-sm);
    background: var(--smurdy-soft);
}

.included-list {
    margin: 28px 0;
    padding: 13px 15px;
    border: 1px solid var(--smurdy-line);
    border-radius: var(--smurdy-radius-sm);
    background: #fff;
}

.included-list summary { cursor: pointer; font-weight: 700; }
.included-list p { margin: 12px 0 2px; }

.quiz-actions,
.action-row,
.flag-actions,
.flag-after-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-top: 24px;
}

.quiz-button,
.qb-btn,
.flag-button {
    display: inline-flex;
    min-height: 44px;
    padding: 10px 15px;
    align-items: center;
    justify-content: center;
    border: 1px solid #c9cdd1;
    border-radius: var(--smurdy-radius-sm);
    background: #f5f6f7;
    color: var(--smurdy-text);
    cursor: pointer;
    font-weight: 700;
    line-height: 1.2;
    text-decoration: none;
}

:is(.quiz-button, .qb-btn, .flag-button):hover {
    border-color: #a8adb2;
    background: #eceeef;
}

:is(.quiz-button, .qb-btn, .flag-button).primary {
    border-color: var(--smurdy-blue);
    background: var(--smurdy-blue);
    color: #fff;
    box-shadow: 0 2px 5px rgba(0, 119, 204, .18);
}

:is(.quiz-button, .qb-btn, .flag-button).primary:hover {
    border-color: var(--smurdy-blue-dark);
    background: var(--smurdy-blue-dark);
}

:is(.quiz-button, .qb-btn, .flag-button):disabled {
    cursor: wait;
    opacity: .7;
}

[data-smurdy-quiz-favorite][aria-pressed="true"],
:is(.quiz-button, .qb-btn, .flag-button).favorite[aria-pressed="true"] {
    border-color: #d19b00;
    background: #fff8dc;
}

.quiz-links,
.link-section,
.flag-links {
    margin-top: 36px;
    padding-top: 22px;
    border-top: 2px solid var(--smurdy-line);
}

:is(.quiz-links, .link-section, .flag-links) > h2 { font-size: 23px; }
:is(.quiz-links, .link-section, .flag-links) h3 { margin: 20px 0 8px; font-size: 17px; }

.chip-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 10px 0 0;
}

.chip {
    display: inline-flex;
    min-height: 40px;
    padding: 8px 12px;
    align-items: center;
    border: 1px solid var(--smurdy-line);
    border-radius: 7px;
    background: var(--smurdy-soft);
    color: var(--smurdy-text);
    font-size: 14px;
    text-decoration: none;
}

.chip:hover {
    border-color: #aaa;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.browse-all-line { margin-top: 22px; font-weight: 700; }

.quiz-footer,
.flag-footer,
body[data-smurdy-quiz-page] > footer {
    width: min(980px, calc(100% - 36px));
    max-width: 980px;
    margin: 18px auto 0;
    padding: 20px 0 34px;
    border-top: 0;
    color: var(--smurdy-muted);
    font-size: 14px;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

@media (max-width: 700px) {
    body[data-smurdy-quiz-page] { background: #fff; }

    .quiz-brand,
    .panel-brand,
    .flag-brand { padding: 13px 18px; }

    :is(.quiz-brand, .panel-brand, .flag-brand) img {
        width: 46px;
        height: 46px;
    }

    body[data-smurdy-quiz-page] .quiz-page,
    body[data-smurdy-quiz-page] main {
        width: 100%;
        margin: 0;
        padding: 22px 18px 12px;
        border: 0;
        border-radius: 0;
        box-shadow: none;
    }

    .quiz-lead,
    .lead,
    .flag-lead { font-size: 17px; }

    .quiz-actions,
    .action-row,
    .flag-actions { align-items: stretch; }

    :is(.quiz-actions, .action-row, .flag-actions) :is(.quiz-button, .qb-btn, .flag-button) {
        flex: 1 1 150px;
    }

    .quiz-footer,
    .flag-footer,
    body[data-smurdy-quiz-page] > footer {
        width: 100%;
        padding-left: 18px;
        padding-right: 18px;
    }
}

@media (prefers-reduced-motion: reduce) {
    body[data-smurdy-quiz-page] * { scroll-behavior: auto !important; }
}