/* MedTest SSR /question — lightweight, aligned with about/home (no main.css) */
:root {
    --q-blue: #2563eb;
    --q-blue-deep: #1d4ed8;
    --q-blue-soft: #eff4ff;
    --q-ink: #0f172a;
    --q-ink-2: #334155;
    --q-muted: #64748b;
    --q-line: #e2e8f0;
    --q-bg: #f7f9fc;
    --q-surface: #ffffff;
    --q-ok: #059669;
    --q-ok-bg: #ecfdf5;
    --q-radius: 16px;
    --q-radius-sm: 12px;
    --q-shadow: 0 12px 40px rgba(15, 23, 42, 0.08);
    --q-font: "Manrope", system-ui, sans-serif;
    --q-max: 800px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
}

body.qseo {
    margin: 0;
    min-height: 100vh;
    font-family: var(--q-font);
    color: var(--q-ink);
    background:
        radial-gradient(1100px 520px at 8% -8%, rgba(37, 99, 235, 0.1), transparent 55%),
        radial-gradient(800px 420px at 96% 0%, rgba(37, 99, 235, 0.06), transparent 50%),
        var(--q-bg);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
}

.qseo-skip {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 100;
    background: var(--q-blue);
    color: #fff;
    padding: 0.75rem 1rem;
}

.qseo-skip:focus {
    left: 1rem;
    top: 1rem;
}

.qseo-wrap {
    width: min(100% - 2rem, var(--q-max));
    margin-inline: auto;
}

/* ——— Header ——— */
.qseo-header {
    position: sticky;
    top: 0;
    z-index: 40;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    background: color-mix(in srgb, var(--q-bg) 82%, transparent);
    border-bottom: 1px solid color-mix(in srgb, var(--q-line) 80%, transparent);
}

.qseo-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    min-height: 64px;
    width: min(100% - 2rem, 1120px);
    margin-inline: auto;
}

.qseo-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.qseo-brand__mark {
    width: 28px;
    height: 28px;
    border-radius: 9px;
    display: inline-flex;
    overflow: hidden;
    flex-shrink: 0;
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.28);
}

.qseo-brand__mark svg {
    display: block;
    width: 28px;
    height: 28px;
}

.qseo-brand__name {
    font-size: 1.125rem;
}

.qseo-header__actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.qseo-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    min-height: 40px;
    padding: 0.5rem 0.95rem;
    border-radius: 999px;
    border: 1px solid transparent;
    font: inherit;
    font-weight: 700;
    font-size: 0.875rem;
    cursor: pointer;
    transition: background 0.18s, color 0.18s, border-color 0.18s, transform 0.18s;
    background: transparent;
    color: inherit;
}

.qseo-btn--primary {
    background: var(--q-blue);
    color: #fff;
}

.qseo-btn--primary:hover {
    background: var(--q-blue-deep);
    transform: translateY(-1px);
}

.qseo-btn--outline {
    border-color: var(--q-line);
    color: var(--q-ink);
    background: var(--q-surface);
}

.qseo-btn--outline:hover {
    border-color: var(--q-blue);
    color: var(--q-blue);
}

.qseo-btn--ghost {
    color: var(--q-ink-2);
}

.qseo-btn--ghost:hover {
    color: var(--q-blue);
}

.qseo-btn--lg {
    min-height: 48px;
    padding: 0.75rem 1.35rem;
    font-size: 0.95rem;
}

/* ——— Main ——— */
.qseo-main {
    padding: 1.25rem 0 3rem;
}

.qseo-crumbs {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem 0.5rem;
    margin: 0 0 1rem;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--q-muted);
}

.qseo-crumbs a {
    color: var(--q-blue);
}

.qseo-crumbs a:hover {
    text-decoration: underline;
}

.qseo-crumbs__sep {
    opacity: 0.45;
}

.qseo-card {
    background: var(--q-surface);
    border: 1px solid rgba(226, 232, 240, 0.8);
    border-radius: var(--q-radius);
    box-shadow: var(--q-shadow);
    padding: 1.35rem 1.35rem 1.5rem;
}

@media (min-width: 640px) {
    .qseo-card {
        padding: 1.75rem 1.85rem 1.85rem;
    }
}

.qseo-card h1 {
    margin: 0 0 1.25rem;
    font-size: clamp(1.2rem, 2.6vw, 1.45rem);
    font-weight: 800;
    letter-spacing: -0.025em;
    line-height: 1.35;
    color: var(--q-ink);
}

.qseo-options {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.65rem;
}

.qseo-options .option-item {
    margin: 0;
    padding: 0.9rem 1rem;
    border-radius: var(--q-radius-sm);
    border: 1px solid var(--q-line);
    background: #fafbfc;
    font-size: 0.95rem;
    font-weight: 500;
    line-height: 1.45;
    color: var(--q-ink-2);
    transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
}

.qseo-options .option-item.correct-answer {
    border-color: color-mix(in srgb, var(--q-ok) 45%, var(--q-line));
    background: var(--q-ok-bg);
    color: #065f46;
    box-shadow: 0 0 0 1px color-mix(in srgb, var(--q-ok) 20%, transparent);
    font-weight: 650;
}

.qseo-reveal {
    margin-top: 1.25rem;
    text-align: center;
}

.qseo-explanation {
    position: relative;
    display: block;
    margin-top: 1.15rem;
    padding: 1.1rem 1.15rem 1.2rem;
    border-radius: var(--q-radius-sm);
    border: 1px solid color-mix(in srgb, var(--q-blue) 22%, var(--q-line));
    background: var(--q-blue-soft);
    color: var(--q-ink-2);
    font-size: 0.9375rem;
    line-height: 1.55;
    overflow: hidden;
}

/* Spoiler for users: blur + clip. Full HTML stays in DOM for crawlers / view-source. */
.qseo-explanation:not(.visible) .qseo-explanation__teaser {
    display: block;
    margin: 0;
    font-size: 0.875rem;
    font-weight: 650;
    color: var(--q-muted);
    text-align: center;
}

.qseo-explanation:not(.visible) .qseo-explanation__body {
    max-height: 4.75rem;
    margin-top: 0.75rem;
    overflow: hidden;
    filter: blur(6px);
    opacity: 0.55;
    user-select: none;
    pointer-events: none;
    -webkit-mask-image: linear-gradient(#000 35%, transparent 95%);
    mask-image: linear-gradient(#000 35%, transparent 95%);
}

.qseo-explanation.visible {
    border-color: color-mix(in srgb, var(--q-blue) 40%, var(--q-line));
    box-shadow: 0 8px 22px rgba(37, 99, 235, 0.08);
}

.qseo-explanation.visible .qseo-explanation__teaser {
    display: none;
}

.qseo-explanation.visible .qseo-explanation__body {
    max-height: none;
    margin-top: 0;
    filter: none;
    opacity: 1;
    user-select: text;
    pointer-events: auto;
    -webkit-mask-image: none;
    mask-image: none;
}

.qseo-explanation__label {
    display: block;
    margin-bottom: 0.65rem;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--q-blue);
}

/* Crawlers / no-JS: show full explanation without spoiler */
@media (scripting: none) {
    .qseo-explanation__teaser {
        display: none !important;
    }
    .qseo-explanation .qseo-explanation__body {
        max-height: none !important;
        filter: none !important;
        opacity: 1 !important;
        user-select: text !important;
        pointer-events: auto !important;
        -webkit-mask-image: none !important;
        mask-image: none !important;
    }
}

.qseo-explanation .ai-hint-answer {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.45rem 0.65rem;
    margin: 0 0 0.85rem;
    padding: 0.7rem 0.85rem;
    border-radius: 12px;
    background: color-mix(in srgb, #16a34a 12%, #fff);
    border: 1px solid color-mix(in srgb, #16a34a 28%, transparent);
}

.qseo-explanation .ai-hint-answer__badge {
    font-size: 0.68rem;
    font-weight: 750;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: #15803d;
}

.qseo-explanation .ai-hint-answer__text {
    margin: 0;
    font-size: 1rem;
    font-weight: 700;
    color: #14532d;
}

.qseo-explanation .ai-hint-section {
    margin: 0 0 0.75rem;
    padding: 0.75rem 0.85rem;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid rgba(226, 232, 240, 0.9);
}

.qseo-explanation .ai-hint-section--tip {
    border-color: color-mix(in srgb, var(--q-blue) 28%, var(--q-line));
    background: color-mix(in srgb, var(--q-blue) 6%, #fff);
}

.qseo-explanation .ai-hint-section__title {
    margin: 0 0 0.45rem;
    font-size: 0.82rem;
    font-weight: 750;
    letter-spacing: -0.01em;
    color: var(--q-ink);
}

.qseo-explanation .ai-hint-section--tip .ai-hint-section__title {
    color: var(--q-blue);
}

.qseo-explanation .ai-hint-section__body > :first-child,
.qseo-explanation .ai-hint-block > :first-child {
    margin-top: 0;
}

.qseo-explanation .ai-hint-section__body > :last-child,
.qseo-explanation .ai-hint-block > :last-child {
    margin-bottom: 0;
}

.qseo-explanation .ai-hint-block {
    margin-bottom: 0.75rem;
}

.qseo-explanation .ai-hint-p {
    margin: 0 0 0.45rem;
}

.qseo-explanation .ai-hint-list {
    margin: 0 0 0.45rem;
    padding: 0 0 0 1.15rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.qseo-explanation .ai-hint-list li::marker {
    color: var(--q-blue);
}

.qseo-explanation .ai-hint-marker {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 0.45rem 0.55rem;
    align-items: start;
    margin: 0 0 0.55rem;
    padding: 0.55rem 0.65rem;
    border-radius: 10px;
    background: #fafbfc;
    border: 1px solid var(--q-line);
}

@media (max-width: 640px) {
    .qseo-explanation .ai-hint-marker {
        grid-template-columns: 1fr;
        gap: 0.3rem;
    }
    .qseo-explanation .ai-hint-marker__arrow {
        display: none;
    }
}

.qseo-explanation .ai-hint-marker__quote {
    margin: 0;
    font-size: 0.875rem;
    font-weight: 650;
    color: var(--q-ink);
}

.qseo-explanation .ai-hint-marker__arrow {
    color: var(--q-blue);
    font-weight: 700;
    padding-top: 0.1rem;
}

.qseo-explanation .ai-hint-marker__note {
    margin: 0;
    font-size: 0.875rem;
    color: var(--q-ink-2);
}

.qseo-explanation strong {
    font-weight: 700;
    color: var(--q-ink);
}

.qseo-explanation code {
    font-size: 0.86em;
    padding: 0.05em 0.35em;
    border-radius: 4px;
    background: rgba(15, 23, 42, 0.06);
}

.qseo-explanation .ai-hint-empty {
    margin: 0;
    color: var(--q-muted);
}

.qseo-cta {
    margin-top: 1.5rem;
    padding-top: 1.35rem;
    border-top: 1px solid var(--q-line);
    text-align: center;
}

.qseo-cta__text {
    margin: 0 0 0.85rem;
    color: var(--q-muted);
    font-size: 0.9375rem;
    font-weight: 500;
}

/* ——— Related ——— */
.qseo-related {
    margin-top: 1.75rem;
}

.qseo-related__title {
    margin: 0 0 0.85rem;
    font-size: 1.05rem;
    font-weight: 750;
    letter-spacing: -0.02em;
}

.qseo-related__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.55rem;
}

.qseo-related__list a {
    display: block;
    padding: 0.85rem 1rem;
    border-radius: var(--q-radius-sm);
    border: 1px solid rgba(226, 232, 240, 0.8);
    background: var(--q-surface);
    box-shadow: 0 4px 14px rgba(15, 23, 42, 0.03);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--q-ink-2);
    transition: border-color 0.15s, color 0.15s, transform 0.15s;
}

.qseo-related__list a:hover {
    border-color: rgba(37, 99, 235, 0.35);
    color: var(--q-blue);
    transform: translateY(-1px);
}

/* ——— Search ——— */
.qseo-search {
    margin-top: 2rem;
}

.qseo-search h2 {
    margin: 0 0 0.85rem;
    font-size: 1.05rem;
    font-weight: 750;
    letter-spacing: -0.02em;
}

.qseo-search__card {
    padding: 1.5rem 1.35rem 1.4rem;
    border-radius: var(--q-radius);
    border: 1px solid rgba(226, 232, 240, 0.8);
    background: var(--q-surface);
    box-shadow: var(--q-shadow);
}

.qseo-search__row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
}

.qseo-search__input {
    flex: 1 1 180px;
    min-height: 44px;
    padding: 0.55rem 0.9rem;
    border-radius: 999px;
    border: 1px solid var(--q-line);
    background: #fafbfc;
    font: inherit;
    font-size: 0.9rem;
    color: var(--q-ink);
    outline: none;
}

.qseo-search__input:focus {
    border-color: var(--q-blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.qseo-search__modes {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
    margin-top: 1.05rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--q-muted);
}

.qseo-search__modes label {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    cursor: pointer;
}

#searchResults {
    margin-top: 1rem;
}

.qseo-search-meta {
    font-size: 0.8rem;
    color: var(--q-muted);
    margin-bottom: 0.5rem;
    text-align: center;
}

.qseo-results-list {
    display: grid;
    gap: 0.75rem;
}

.qseo-load-more {
    display: flex;
    justify-content: center;
    padding: 1.25rem 0 0.5rem;
}

.qseo-load-more .qseo-btn {
    min-width: 11rem;
}

.qseo-load-more .qseo-btn:disabled {
    opacity: 0.65;
    cursor: wait;
}

.qseo-result {
    padding: 1rem;
    border-radius: var(--q-radius-sm);
    border: 1px solid rgba(226, 232, 240, 0.8);
    background: var(--q-surface);
}

.qseo-result__meta {
    display: flex;
    justify-content: space-between;
    gap: 0.5rem;
    margin-bottom: 0.55rem;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--q-muted);
}

.qseo-result__badge {
    color: var(--q-blue);
    background: var(--q-blue-soft);
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
}

.qseo-result__text {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--q-ink);
    margin-bottom: 0.65rem;
}

.qseo-result__opts {
    display: grid;
    gap: 0.35rem;
    font-size: 0.8125rem;
    color: var(--q-ink-2);
}

.qseo-result__opt.correct {
    color: var(--q-ok);
    font-weight: 650;
}

.qseo-result__link {
    display: inline-block;
    margin-top: 0.75rem;
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--q-blue);
}

.qseo-result__link:hover {
    text-decoration: underline;
}

.qseo-search-loading,
.qseo-search-empty,
.qseo-search-error {
    text-align: center;
    padding: 1.25rem;
    color: var(--q-muted);
    font-size: 0.9rem;
}

.qseo-spinner {
    width: 28px;
    height: 28px;
    margin: 0 auto 0.65rem;
    border: 2.5px solid var(--q-line);
    border-top-color: var(--q-blue);
    border-radius: 50%;
    animation: qseo-spin 0.7s linear infinite;
}

@keyframes qseo-spin {
    to { transform: rotate(360deg); }
}

mark {
    background: #fef08a;
    color: inherit;
    padding: 0 0.1em;
    border-radius: 2px;
}

/* ——— Footer ——— */
.qseo-footer {
    margin-top: auto;
    padding: 2rem 0 2.5rem;
    border-top: 1px solid color-mix(in srgb, var(--q-line) 85%, transparent);
    text-align: center;
}

.qseo-footer__copy {
    margin: 0 0 0.5rem;
    font-size: 0.8125rem;
    color: var(--q-muted);
    font-weight: 500;
}

.qseo-footer__links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.35rem 0.75rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--q-muted);
}

.qseo-footer__links a:hover {
    color: var(--q-blue);
}

/* ——— Promo SSR page overrides ——— */
.qseo .promo-ssr {
    margin: 1rem 0;
    width: 100%;
}

.qseo .promo-ssr .promo-banner-slot {
    margin: 0;
    width: 100%;
}

.qseo .promo-ssr .promo-ssr__mobile { display: block !important; }
.qseo .promo-ssr .promo-ssr__desktop { display: none !important; }

@media (min-width: 768px) {
    .qseo .promo-ssr .promo-ssr__mobile { display: none !important; }
    .qseo .promo-ssr .promo-ssr__desktop { display: block !important; }
}

.qseo .promo-ssr .promo-ssr__mobile.promo-banner-slot--leaderboard {
    --promo-ar: 320 / 50; max-width: 320px; margin-inline: auto;
}
.qseo .promo-ssr .promo-ssr__mobile.promo-banner-slot--banner {
    --promo-ar: 320 / 100; max-width: 320px; margin-inline: auto;
}
.qseo .promo-ssr .promo-ssr__mobile.promo-banner-slot--mobile_150 {
    --promo-ar: 320 / 150; max-width: 320px; margin-inline: auto;
}
.qseo .promo-ssr .promo-ssr__mobile.promo-banner-slot--mobile_200 {
    --promo-ar: 320 / 200; max-width: 320px; margin-inline: auto;
}
.qseo .promo-ssr .promo-ssr__mobile.promo-banner-slot--mrec {
    --promo-ar: 300 / 250; max-width: 300px; margin-inline: auto;
}
.qseo .promo-ssr .promo-ssr__mobile.promo-banner-slot--large_rect {
    --promo-ar: 336 / 280; max-width: 336px; margin-inline: auto;
}
.qseo .promo-ssr .promo-ssr__mobile.promo-banner-slot--billboard {
    --promo-ar: 300 / 250; max-width: 300px; margin-inline: auto;
}

.qseo .promo-ssr .promo-ssr__desktop.promo-banner-slot--desktop_100,
.qseo .promo-ssr .promo-ssr__desktop.promo-banner-slot--leaderboard,
.qseo .promo-ssr .promo-ssr__desktop.promo-banner-slot--banner {
    --promo-ar: 970 / 100; max-width: 970px; margin-inline: auto;
}
.qseo .promo-ssr .promo-ssr__desktop.promo-banner-slot--desktop_150 {
    --promo-ar: 970 / 150; max-width: 970px; margin-inline: auto;
}
.qseo .promo-ssr .promo-ssr__desktop.promo-banner-slot--desktop_200 {
    --promo-ar: 970 / 200; max-width: 970px; margin-inline: auto;
}
.qseo .promo-ssr .promo-ssr__desktop.promo-banner-slot--billboard {
    --promo-ar: 970 / 250; max-width: 970px; margin-inline: auto;
}
.qseo .promo-ssr .promo-ssr__desktop.promo-banner-slot--mrec {
    --promo-ar: 300 / 250; max-width: 300px; margin-inline: auto;
}
.qseo .promo-ssr .promo-ssr__desktop.promo-banner-slot--large_rect {
    --promo-ar: 336 / 280; max-width: 336px; margin-inline: auto;
}

.qseo .promo-ssr .promo-banner__img,
.qseo .promo-ssr .promo-banner__link .promo-banner__img {
    object-fit: contain;
    background: transparent;
}

.qseo .promo-ssr--question-sidebar,
.qseo .promo-ssr-sidebar-wrap .promo-ssr {
    margin: 0;
}

.qseo .ad-sidebar-container {
    display: none;
}

@media (min-width: 1100px) {
    .qseo .ad-sidebar-container {
        display: block;
        position: fixed;
        right: 0.65rem;
        bottom: 0.85rem;
        z-index: 40;
        width: auto;
    }

    .qseo .ad-sidebar-container .promo-ssr__mobile {
        display: none !important;
    }

    .qseo .ad-sidebar-container .promo-ssr__desktop {
        display: block !important;
    }

    .qseo .ad-sidebar-container .promo-banner-slot--skyscraper {
        width: 160px;
    }

    .qseo .ad-sidebar-container .promo-banner-slot--skyscraper .promo-banner__link,
    .qseo .ad-sidebar-container .promo-banner-slot--skyscraper > .promo-banner__img,
    .qseo .ad-sidebar-container .promo-banner-slot--skyscraper .promo-placeholder {
        width: 160px;
        height: min(600px, 80vh);
        aspect-ratio: auto;
    }

    .qseo .ad-sidebar-container .promo-banner-slot--skyscraper_wide {
        width: 300px;
    }

    .qseo .ad-sidebar-container .promo-banner-slot--skyscraper_wide .promo-banner__link,
    .qseo .ad-sidebar-container .promo-banner-slot--skyscraper_wide > .promo-banner__img,
    .qseo .ad-sidebar-container .promo-banner-slot--skyscraper_wide .promo-placeholder {
        width: 300px;
        height: min(600px, 80vh);
        aspect-ratio: auto;
    }
}

.qseo .promo-ssr .promo-placeholder {
    max-width: 100%;
    margin-inline: auto;
}

@media (prefers-reduced-motion: reduce) {
    .qseo-btn,
    .qseo-related__list a,
    .qseo-spinner {
        transition: none;
        animation: none;
        transform: none !important;
    }
}