.osnaquiz {
    --oq-navy: #071f4d;
    --oq-blue: #0b4f91;
    --oq-red: #d71920;
    --oq-cream: #f7f3eb;
    --oq-ink: #172033;
    --oq-muted: #667085;
    --oq-green: #16875b;
    box-sizing: border-box;
    color: var(--oq-ink);
    font-family: Arial, Helvetica, sans-serif;
    margin: 20px auto 40px;
    max-width: 900px;
    padding: 0 18px;
}

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

.osnaquiz__brand {
    margin: 0 auto 24px;
    text-align: center;
}

.osnaquiz__eyebrow {
    color: var(--oq-red);
    display: block;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: .13em;
    margin-bottom: 6px;
    text-transform: uppercase;
}

.osnaquiz__brand h1 {
    color: var(--oq-navy);
    font-size: clamp(44px, 9vw, 76px);
    font-weight: 900;
    letter-spacing: -.07em;
    line-height: .95;
    margin: 0;
}

.osnaquiz__brand h1 span {
    color: var(--oq-red);
}

.osnaquiz__brand p {
    color: var(--oq-muted);
    font-size: 16px;
    margin: 10px 0 0;
}

.osnaquiz__card {
    background:
        radial-gradient(circle at 100% 0, rgba(215, 25, 32, .08), transparent 210px),
        #fff;
    border: 1px solid #d9dee8;
    border-radius: 22px;
    box-shadow: 0 16px 45px rgba(7, 31, 77, .12);
    overflow: hidden;
    padding: clamp(24px, 5vw, 48px);
    position: relative;
}

.osnaquiz__card::before {
    background: linear-gradient(90deg, var(--oq-red) 0 28%, var(--oq-navy) 28% 100%);
    content: "";
    height: 6px;
    left: 0;
    position: absolute;
    right: 0;
    top: 0;
}

.osnaquiz__date {
    color: var(--oq-blue);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: .1em;
    margin-bottom: 15px;
    text-transform: uppercase;
}

.osnaquiz__card h2 {
    color: var(--oq-navy);
    font-size: clamp(25px, 4.5vw, 40px);
    font-weight: 800;
    letter-spacing: -.025em;
    line-height: 1.14;
    margin: 0 0 28px;
    max-width: 760px;
}

.osnaquiz__answers {
    display: grid;
    gap: 12px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.osnaquiz__answer {
    align-items: center;
    appearance: none;
    background: #fff;
    border: 2px solid #d8dfea;
    border-radius: 13px;
    color: var(--oq-ink);
    cursor: pointer;
    display: grid;
    font: inherit;
    font-size: 17px;
    font-weight: 700;
    gap: 12px;
    grid-template-columns: 42px 1fr 30px;
    line-height: 1.25;
    min-height: 78px;
    padding: 11px 14px;
    text-align: left;
    transition: border-color .16s ease, box-shadow .16s ease, transform .16s ease, background .16s ease;
    width: 100%;
}

.osnaquiz__answer:hover:not(:disabled),
.osnaquiz__answer:focus-visible {
    border-color: var(--oq-blue);
    box-shadow: 0 7px 20px rgba(11, 79, 145, .13);
    outline: none;
    transform: translateY(-2px);
}

.osnaquiz__answer:disabled {
    cursor: default;
    opacity: .7;
}

.osnaquiz__answer.is-correct {
    background: #ebf8f2;
    border-color: var(--oq-green);
    color: #0b6543;
    opacity: 1;
}

.osnaquiz__answer.is-wrong {
    background: #fff0f0;
    border-color: var(--oq-red);
    color: #9b1015;
    opacity: 1;
}

.osnaquiz__answer.is-pending {
    opacity: .65;
}

.osnaquiz__letter {
    align-items: center;
    background: var(--oq-navy);
    border-radius: 50%;
    color: #fff;
    display: inline-flex;
    font-size: 14px;
    height: 42px;
    justify-content: center;
    width: 42px;
}

.is-correct .osnaquiz__letter {
    background: var(--oq-green);
}

.is-wrong .osnaquiz__letter {
    background: var(--oq-red);
}

.osnaquiz__answer-state {
    font-size: 25px;
    font-weight: 900;
    text-align: center;
}

.osnaquiz__feedback {
    border-left: 5px solid var(--oq-green);
    border-radius: 8px;
    margin-top: 22px;
    padding: 15px 18px;
}

.osnaquiz__feedback.is-correct {
    background: #ebf8f2;
    color: #0b6543;
}

.osnaquiz__feedback.is-wrong {
    background: #fff2f2;
    border-color: var(--oq-red);
    color: #851319;
}

.osnaquiz__feedback strong {
    display: block;
    font-size: 21px;
}

.osnaquiz__feedback p {
    color: var(--oq-ink);
    margin: 6px 0 0;
}

.osnaquiz__feedback-source {
    font-size: 13px;
}

.osnaquiz__feedback-source span {
    font-weight: 700;
}

.osnaquiz__feedback-source a {
    color: inherit;
    font-weight: 700;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.osnaquiz__stats-button {
    appearance: none;
    background: var(--oq-red);
    border: 0;
    border-radius: 9px;
    box-shadow: 0 8px 20px rgba(215, 25, 32, .22);
    color: #fff;
    cursor: pointer;
    display: block;
    font: 800 16px/1.2 Arial, Helvetica, sans-serif;
    margin: 18px 0 0;
    min-height: 50px;
    padding: 14px 22px;
    transition: background .16s ease, transform .16s ease;
}

.osnaquiz__stats-button:hover,
.osnaquiz__stats-button:focus-visible {
    background: #b90f16;
    outline: 3px solid rgba(215, 25, 32, .2);
    transform: translateY(-1px);
}

.osnaquiz__stats {
    border-top: 1px solid #dfe4ec;
    margin-top: 25px;
    padding-top: 25px;
}

.osnaquiz__stats h3 {
    color: var(--oq-navy);
    font-size: 21px;
    margin: 0 0 20px;
}

.osnaquiz__stat-row {
    margin: 0 0 17px;
}

.osnaquiz__stat-head {
    align-items: flex-end;
    display: flex;
    font-size: 14px;
    gap: 10px;
    justify-content: space-between;
    margin-bottom: 6px;
}

.osnaquiz__stat-head span {
    font-weight: 700;
}

.osnaquiz__stat-head strong {
    color: var(--oq-navy);
    white-space: nowrap;
}

.osnaquiz__stat-track {
    background: #edf0f4;
    border-radius: 999px;
    height: 13px;
    overflow: hidden;
}

.osnaquiz__stat-track span {
    background: var(--oq-blue);
    border-radius: inherit;
    display: block;
    height: 100%;
    min-width: 3px;
    transition: width .5s ease;
}

.osnaquiz__stat-row.is-correct .osnaquiz__stat-track span {
    background: var(--oq-green);
}

.osnaquiz__privacy {
    color: var(--oq-muted);
    font-size: 13px;
}

.osnaquiz__privacy {
    margin: 13px 0 0;
    text-align: center;
}

.osnaquiz__empty {
    align-items: center;
    background: var(--oq-cream);
    border: 1px solid #e1ddd4;
    border-radius: 18px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 50px 20px;
    text-align: center;
}

.osnaquiz [hidden] {
    display: none !important;
}

@media (max-width: 640px) {
    .osnaquiz {
        padding: 0 12px;
    }

    .osnaquiz__card {
        border-radius: 16px;
        padding: 25px 16px;
    }

    .osnaquiz__answers {
        grid-template-columns: 1fr;
    }

    .osnaquiz__answer {
        min-height: 68px;
    }

    .osnaquiz__stats-button {
        width: 100%;
    }
}

@media (prefers-reduced-motion: reduce) {
    .osnaquiz *,
    .osnaquiz *::before,
    .osnaquiz *::after {
        scroll-behavior: auto !important;
        transition: none !important;
    }
}