.siqg-quiz {
    background: linear-gradient(135deg, #ffffff, #f8fafd);
    border-radius: 28px;
    box-shadow: 0 20px 35px -12px rgba(0,0,0,0.12);
    padding: 28px 24px;
    margin: 30px 0;
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}
.siqg-header { margin-bottom: 20px; }
.siqg-number, .siqg-badge {
    background: #3b82f6;
    color: white;
    padding: 6px 18px;
    border-radius: 40px;
    font-size: 0.9rem;
    font-weight: 600;
    display: inline-block;
}
.siqg-question {
    font-size: 1.6rem;
    font-weight: 700;
    color: #0f172a;
    margin: 20px 0 24px;
    line-height: 1.4;
}
.siqg-options {
    display: grid;
    gap: 14px;
    margin: 28px 0 32px;
}
.siqg-option {
    background: white;
    border: 1.5px solid #e2e8f0;
    border-radius: 60px;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 14px;
    cursor: pointer;
    transition: all 0.2s;
}
.siqg-option:hover {
    border-color: #3b82f6;
    background: #f0f9ff;
}
.siqg-letter {
    background: #f1f5f9;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-weight: 800;
    font-size: 1.2rem;
    color: #1e293b;
}
.siqg-text {
    font-weight: 500;
    color: #1e293b;
    flex: 1;
}
.siqg-get-answer {
    background: #3b82f6;
    border: none;
    color: white;
    padding: 14px 32px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 60px;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(59,130,246,0.3);
}
.siqg-answer-area {
    background: #fefce8;
    border-left: 5px solid #eab308;
    padding: 18px 22px;
    border-radius: 20px;
    margin: 24px 0 18px;
    text-align: center;
}
.siqg-correct-message {
    font-size: 1.2rem;
    font-weight: 700;
    color: #854d0e;
    margin-bottom: 16px;
}
.siqg-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
}
.siqg-close-answer, .siqg-view-explanation, .siqg-close-explanation {
    padding: 10px 24px;
    border-radius: 40px;
    font-weight: 600;
    cursor: pointer;
    border: none;
}
.siqg-close-answer { background: #e2e8f0; color: #1e293b; }
.siqg-view-explanation { background: #1e293b; color: white; }
.siqg-close-explanation { background: #f1f5f9; color: #334155; margin-top: 16px; }
.siqg-explanation {
    background: #f8fafc;
    border-radius: 24px;
    padding: 24px;
    margin-top: 24px;
    border: 1px solid #cbd5e1;
}
.siqg-exp-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: #0f172a;
    border-left: 5px solid #3b82f6;
    padding-left: 16px;
    margin-bottom: 18px;
}
.siqg-exp-content {
    font-size: 1rem;
    line-height: 1.65;
    color: #1e293b;
}
.siqg-exp-content p, .siqg-exp-content ul, .siqg-exp-content ol {
    margin-bottom: 1em;
}
.siqg-exp-content a {
    color: #3b82f6;
    text-decoration: none;
}
@media (max-width: 640px) {
    .siqg-quiz { padding: 20px 16px; }
    .siqg-question { font-size: 1.35rem; }
    .siqg-options { grid-template-columns: 1fr; }
    .siqg-get-answer { width: 100%; justify-content: center; }
    .siqg-buttons { flex-direction: column; }
}