.development-pdf3-17-shell {
    max-width: 1180px;
}

.development-pdf3-17-controls {
    gap: 18px;
}

.development-pdf3-17-card .mcq-card-surface {
    cursor: default;
    min-height: 620px;
}

.development-pdf3-17-card .mcq-card-content {
    align-items: stretch;
    display: flex;
    flex-direction: column;
    gap: 28px;
    justify-content: flex-start;
    text-align: left;
}

.mcq-prompt {
    color: #eef5ff;
    font-size: clamp(2.2rem, 4.8vw, 5rem);
    font-weight: 900;
    letter-spacing: 0;
    line-height: 1.05;
    margin: 0;
    text-align: center;
}

.mcq-hint {
    color: #a9b8c8;
    font-size: 1.05rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    margin: 0;
    text-transform: uppercase;
}

.mcq-options {
    display: grid;
    gap: 12px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.mcq-option {
    align-items: flex-start;
    background: rgba(33, 42, 52, 0.62);
    border: 1px solid rgba(137, 161, 187, 0.34);
    border-radius: 14px;
    color: #e7eef7;
    cursor: pointer;
    display: grid;
    font: inherit;
    gap: 14px;
    grid-template-columns: auto 1fr;
    line-height: 1.35;
    padding: 16px 18px;
    text-align: left;
    transition: background 130ms ease, border-color 130ms ease, box-shadow 130ms ease, transform 130ms ease;
    width: 100%;
}

.mcq-option:hover {
    background: rgba(50, 63, 78, 0.82);
    border-color: rgba(154, 199, 238, 0.6);
    transform: translateY(-1px);
}

.mcq-option.is-selected {
    background: rgba(111, 155, 203, 0.24);
    border-color: rgba(154, 199, 238, 0.78);
    box-shadow: 0 0 0 2px rgba(154, 199, 238, 0.12);
}

.mcq-option.is-correct {
    background: rgba(122, 184, 140, 0.2);
    border-color: rgba(157, 220, 172, 0.72);
}

.mcq-option.is-wrong {
    background: rgba(224, 122, 122, 0.17);
    border-color: rgba(236, 153, 153, 0.68);
}

.mcq-option-letter {
    align-items: center;
    background: rgba(154, 199, 238, 0.18);
    border: 1px solid rgba(154, 199, 238, 0.35);
    border-radius: 999px;
    color: #cfe5ff;
    display: inline-flex;
    font-weight: 900;
    height: 32px;
    justify-content: center;
    min-width: 32px;
}

.mcq-option-text {
    font-size: clamp(1.08rem, 1.8vw, 1.42rem);
    font-weight: 750;
}

.mcq-answer-panel {
    background: rgba(19, 25, 31, 0.45);
    border: 1px solid rgba(137, 161, 187, 0.28);
    border-left: 6px solid rgba(181, 220, 174, 0.72);
    border-radius: 14px;
    color: #dfe8f2;
    display: grid;
    gap: 12px;
    line-height: 1.45;
    padding: 18px 20px;
}

.mcq-answer-panel h3 {
    color: #b7d8ff;
    font-size: 1rem;
    letter-spacing: 0.14em;
    margin: 0;
    text-transform: uppercase;
}

.mcq-answer-panel p {
    margin: 0;
}

.mcq-answer-list {
    display: grid;
    gap: 8px;
    margin: 0;
    padding-left: 20px;
}

.development-pdf3-17-card .topic-tag[data-topic="meiosis"],
.development-pdf3-17-card .topic-tag[data-topic="prophase-i"],
.development-pdf3-17-card .topic-tag[data-topic="crossing-over"] {
    background: rgba(154, 199, 238, 0.14);
    border-color: rgba(154, 199, 238, 0.38);
    color: #d8eaff;
}

.development-pdf3-17-card .topic-tag[data-topic="mutations"],
.development-pdf3-17-card .topic-tag[data-topic="true-false"] {
    background: rgba(195, 181, 237, 0.15);
    border-color: rgba(195, 181, 237, 0.38);
    color: #ded5ff;
}

.development-pdf3-17-card .topic-tag[data-topic="gonocytes"],
.development-pdf3-17-card .topic-tag[data-topic="spermatogenesis"],
.development-pdf3-17-card .topic-tag[data-topic="spermiogenesis"],
.development-pdf3-17-card .topic-tag[data-topic="sperm"],
.development-pdf3-17-card .topic-tag[data-topic="testis-cells"],
.development-pdf3-17-card .topic-tag[data-topic="oogenesis"] {
    background: rgba(241, 201, 141, 0.15);
    border-color: rgba(241, 201, 141, 0.4);
    color: #f4d6a6;
}

.development-pdf3-17-card .topic-tag[data-topic="infertility"],
.development-pdf3-17-card .topic-tag[data-topic="ovulation"],
.development-pdf3-17-card .topic-tag[data-topic="follicular-cells"],
.development-pdf3-17-card .topic-tag[data-topic="corpus-luteum"] {
    background: rgba(181, 220, 174, 0.15);
    border-color: rgba(181, 220, 174, 0.4);
    color: #d7f0cf;
}

.mcq-done {
    align-items: center;
    display: grid;
    min-height: 360px;
    place-items: center;
    text-align: center;
}

.mcq-done h2 {
    color: #eef5ff;
    font-size: clamp(2.4rem, 5vw, 5rem);
    line-height: 1;
    margin: 0;
}

.mcq-done p {
    color: #b9c6d5;
    font-size: 1.2rem;
    font-weight: 750;
    margin: 14px 0 0;
}

@media (max-width: 720px) {
    .development-pdf3-17-card .mcq-card-surface {
        min-height: 560px;
    }

    .mcq-option {
        border-radius: 12px;
        padding: 14px;
    }
}