:root {
    --primary-color: #2171B5;   /* Primary Blue */
    --secondary-color: #6BAED6; /* Sky Blue */
    --accent-color: #BDD7E7;    /* Light Blue */
    --background-color: #EFF3FF; /* Very Light Blue */
    --text-color: #2171B5;
    --button-hover: #6BAED6;
    --button-bg: #BDD7E7;
    --button-text: #2171B5;
}

body {
    background: linear-gradient(180deg, #EFF3FF 0%, #BDD7E7 50%, #6BAED6 100%);
    color: var(--text-color);
}

.quiz-header,.score-card{text-align:center}.quiz-container,.quiz-results{max-width:800px;margin:2rem auto;padding:2rem;background:#fff;border-radius:10px;box-shadow:0 2px 4px rgba(0,0,0,.1)}.quiz-header,.quiz-question,.results-summary,.score-card{margin-bottom:2rem}.quiz-header h2,.score-card h3{color:var(--primary-color);margin-bottom:1rem}.quiz-progress{color:var(--secondary-color);font-weight:500}.quiz-question h3{color:var(--primary-color);margin-bottom:1.5rem;font-size:1.3rem}.quiz-options{display:grid;grid-template-columns:1fr;gap:1rem}.option-btn{padding:1rem;background:var(--background-color);border:2px solid var(--secondary-color);border-radius:5px;color:var(--primary-color);font-size:1rem;cursor:pointer;transition:.3s}.download-btn,.option-btn:hover{background:var(--secondary-color);color:#fff}.quiz-controls{display:flex;justify-content:space-between;margin-top:2rem;padding:0 1rem}.download-btn,.restart-btn,.skip-btn,.stop-btn{padding:.8rem 1.5rem;border:none;border-radius:5px;font-size:1rem;cursor:pointer;transition:.3s}.skip-btn{background:var(--accent-color);color:#fff}.stop-btn{background:#e74c3c;color:#fff}.answer-item,.score-card{background:var(--background-color)}.download-btn:hover,.restart-btn:hover,.skip-btn:hover,.stop-btn:hover{opacity:.9}.score-card{padding:1.5rem;border-radius:10px}.answer-item h4,.score{margin-bottom:.5rem}.score{font-size:2rem;font-weight:700;color:var(--secondary-color)}.answer-item h4,.close-modal:hover,.percentage{color:var(--primary-color)}.percentage{font-size:1.2rem}.answers-summary{display:grid;gap:1rem}.answer-item{padding:1rem;border-radius:5px}.answer-item.correct{border-left:4px solid #2ecc71}.answer-item.incorrect{border-left:4px solid #e74c3c}.answer-item p{margin-bottom:.3rem;color:#666}.results-actions{display:flex;justify-content:center;gap:1rem}.restart-btn{background:var(--primary-color);color:#fff}.modal{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background-color:rgba(0,0,0,.5);z-index:1000}.modal-content{background-color:#fff;margin:15% auto;padding:2rem;border-radius:10px;width:90%;max-width:500px;position:relative}.close-modal{position:absolute;right:1rem;top:1rem;font-size:1.5rem;cursor:pointer;color:#666}@media (max-width:768px){.quiz-container,.quiz-results{margin:1rem;padding:1rem}.quiz-options{grid-template-columns:1fr}.results-actions{flex-direction:column}.download-btn,.restart-btn{width:100%}}.download-btn:focus,.option-btn:focus,.restart-btn:focus,.skip-btn:focus,.stop-btn:focus{outline:3px solid var(--accent-color);outline-offset:2px}@media print{.quiz-controls,.results-actions{display:none}.answer-item{break-inside:avoid;page-break-inside:avoid}}

/* Quiz Section Styles */
.quiz-section {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 2rem;
    text-align: center;
}

.quiz-section h2 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 1rem;
}

.quiz-section p {
    color: #666;
    font-size: 1.1rem;
    max-width: 800px;
    margin: 0 auto 2rem;
    line-height: 1.6;
}

/* Quiz Container Styles */
.quiz-container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 2rem;
    background: #fff;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: all 0.3s ease;
}

/* Quiz Active Animation */
.quiz-container.quiz-active {
    animation: quizHighlight 1s ease-out;
    border: 2px solid var(--primary-color);
    box-shadow: 0 0 20px rgba(33, 113, 181, 0.2);
}

@keyframes quizHighlight {
    0% {
        transform: scale(0.98);
        box-shadow: 0 0 0 0 rgba(33, 113, 181, 0.4);
    }
    70% {
        transform: scale(1);
        box-shadow: 0 0 20px 10px rgba(33, 113, 181, 0);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 0 20px rgba(33, 113, 181, 0.2);
    }
}

.quiz-info {
    display: flex;
    justify-content: space-around;
    align-items: center;
    margin-bottom: 2rem;
    padding: 1rem;
    background: var(--accent-color);
    border-radius: 10px;
    box-shadow: 0 4px 16px 0 rgba(33, 113, 181, 0.18), 0 1.5px 4px 0 rgba(33, 113, 181, 0.10);
}

.quiz-info-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.info-label {
    font-size: 0.9rem;
    color: #666;
    font-weight: 500;
}

.info-value {
    font-size: 1.1rem;
    color: var(--primary-color);
    font-weight: 600;
}

.quiz-progress {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding: 1rem;
    background: var(--background-color);
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.progress-bar {
    flex-grow: 1;
    height: 8px;
    background: #eee;
    border-radius: 4px;
    margin: 0 1rem;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--secondary-color);
    transition: width 0.3s ease;
}

.quiz-question {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 2rem;
    padding: 1rem;
    background: var(--background-color);
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.quiz-options {
    display: grid;
    gap: 15px;
    margin: 20px auto;
    width: 100%;
    max-width: 600px;
}

.quiz-option {
    background-color: #ffffff;
    border: 2px solid #4a90e2;
    border-radius: 8px;
    padding: 15px 20px;
    margin: 10px auto;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 16px;
    font-weight: 500;
    color: #333;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    width: 100%;
    text-align: center;
}

.quiz-option:hover {
    background-color: #f0f7ff;
    border-color: #2d6da3;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.quiz-option:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.quiz-option.correct {
    background-color: #4CAF50;
    border-color: #388E3C;
    color: white;
    box-shadow: 0 4px 8px rgba(76, 175, 80, 0.3);
}

.quiz-option.incorrect {
    background-color: #F44336;
    border-color: #D32F2F;
    color: white;
    box-shadow: 0 4px 8px rgba(244, 67, 54, 0.3);
}

.quiz-option:disabled {
    cursor: not-allowed;
    opacity: 0.8;
}

.quiz-explanation {
    background-color: #f8f9fa;
    border-left: 4px solid #4a90e2;
    padding: 20px;
    margin: 20px 0;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.quiz-explanation h3 {
    color: #2d6da3;
    margin-top: 0;
    margin-bottom: 10px;
}

.quiz-explanation p {
    color: #333;
    margin: 0;
    line-height: 1.6;
}

.quiz-results {
    text-align: center;
    padding: 2rem;
    background: var(--background-color);
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.quiz-results h2 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 1rem;
}

.quiz-score {
    font-size: 1.5rem;
    color: var(--secondary-color);
    margin-bottom: 2rem;
}

.quiz-score span {
    font-weight: bold;
    font-size: 2rem;
}

/* Topics Section Styles */
.topics-section {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 2rem;
    text-align: center;
}

.topics-section h2 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 1rem;
}

.topics-section p {
    color: #666;
    font-size: 1.1rem;
    max-width: 800px;
    margin: 0 auto 2rem;
    line-height: 1.6;
}

.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    padding: 1rem;
}

.topic-card {
    background: #fff;
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.topic-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 25px rgba(0, 0, 0, 0.15);
}

.topic-card i {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.topic-card h2 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.topic-card p {
    color: #666;
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

/* Responsive Styles */
@media (max-width: 768px) {
    .quiz-section,
    .topics-section {
        padding: 1rem;
    }

    .quiz-container {
        margin: 1rem;
        padding: 1rem;
    }

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

    .quiz-section h2,
    .topics-section h2 {
        font-size: 1.8rem;
    }

    .quiz-section p,
    .topics-section p {
        font-size: 1rem;
    }
}

.quiz-controls {
    display: flex;
    justify-content: space-between;
    margin-top: 2rem;
    padding: 0 1rem;
}

.skip-btn, .stop-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.3s, transform 0.2s;
}

.skip-btn {
    background-color: var(--accent-color);
    color: white;
}

.stop-btn {
    background-color: #e74c3c;
    color: white;
}

.skip-btn:hover, .stop-btn:hover {
    transform: translateY(-2px);
}

.skip-btn:hover {
    background-color: #e67e22;
}

.stop-btn:hover {
    background-color: #c0392b;
}

.skip-btn:active, .stop-btn:active {
    transform: translateY(0);
}