.integer-muldiv-prompt {
    font-size: 1.1rem;
    font-weight: 600;
    color: #444;
    text-align: center;
    margin: 0.5rem 0 1rem;
}

.integer-muldiv-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.7rem;
    min-height: 5rem;
    margin: 0 auto 1.25rem;
    padding: 0.75rem 1.5rem;
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: #1f3a5f;
    background: #f4f8ff;
    border: 2px solid #bcd4f6;
    border-radius: 16px;
}

.integer-muldiv-expr {
    white-space: nowrap;
}

.integer-muldiv-eq {
    color: #8fa2bd;
}

.integer-muldiv-answer-slot {
    min-width: 2.2rem;
    text-align: center;
    color: #e08a00;
}

.integer-muldiv-options {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.integer-muldiv-option {
    min-width: 5rem;
    padding: 0.85rem 1.2rem;
    font-size: 1.4rem;
    font-weight: 700;
    color: #1f3a5f;
    background: #ffffff;
    border: 2px solid #bcd4f6;
    border-radius: 14px;
    cursor: pointer;
    transition: transform 0.1s ease, box-shadow 0.1s ease;
}

.integer-muldiv-option:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(31, 58, 95, 0.15);
}

.integer-muldiv-input {
    display: block;
    width: min(12rem, 80%);
    margin: 0 auto 1rem;
    padding: 0.75rem;
    font-size: 1.6rem;
    font-weight: 700;
    text-align: center;
    color: #1f3a5f;
    border: 2px solid #bcd4f6;
    border-radius: 14px;
}

.integer-muldiv-hint {
    text-align: left;
}

.integer-muldiv-hint p {
    margin: 0.35rem 0;
}