.quiz-container {
        max-width: 900px;
        margin: 0 auto;
        padding: 2rem;
}

.quiz-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    text-align: center;
}

.quiz-title {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.quiz-meta {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1rem;
    opacity: 0.9;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.question-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 1.5rem;
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
}

.question-card.current {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.question-header {
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.question-number {
    background: var(--primary-color);
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
}

.question-type {
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
}

.question-content {
    padding: 1.5rem;
}

.question-text {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.choices-container {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.choice {
    display: flex;
    align-items: center;
    padding: 1rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.choice:hover {
    border-color: var(--primary-color);
    background: rgba(79, 70, 229, 0.05);
}

.choice.selected {
    border-color: var(--primary-color);
    background: rgba(79, 70, 229, 0.1);
}

.choice.correct {
    border-color: var(--primary-color);
    background: rgba(16, 185, 129, 0.1);
}

.choice.incorrect {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

.choice-input {
    margin-right: 12px;
    transform: scale(1.2);
}

.choice-label {
    flex: 1;
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--text-primary);
}

.choice-indicator {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.choice.correct .choice-indicator,
.choice.incorrect .choice-indicator {
    opacity: 1;
}

.explanation {
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(59, 130, 246, 0.05);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 8px;
    display: none;
}

.explanation.show {
    display: block;
}

.explanation-title {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.explanation-text {
    color: var(--text-secondary);
    line-height: 1.5;
}

.quiz-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 2rem 0;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.nav-button {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-previous {
    background: var(--bg-primary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-previous:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.btn-next, .btn-submit {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.btn-next:hover, .btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.btn-previous:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.progress-indicator {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.progress-text {
    font-weight: 500;
    color: var(--text-primary);
}

.progress-bar {
    width: 200px;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: width 0.3s ease;
}

.quiz-results {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    margin-top: 2rem;
}

.score-circle {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 2rem;
    font-weight: 700;
}

.results-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

@media (max-width: 768px) {
    .quiz-container {
        padding: 1rem;
    }
    
    .quiz-meta {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .quiz-navigation {
        flex-direction: column;
        gap: 1rem;
    }
    
    .progress-indicator {
        order: -1;
    }
    
    .progress-bar {
        width: 100%;
    }
    
    .results-actions {
        flex-direction: column;
    }
}

[dark-theme="dark"] .btn-document-action{
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50px;
    padding: 0.75rem 2rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    margin: 0.5rem;
    position: relative;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
}

[data-theme="dark"] .quizzes-hero {
        background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
}