.quiz-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

.quiz-header {
    text-align: center;
    margin-bottom: 2rem;
}

.quiz-header h1 {
    font-size: 2rem;
    color: #2d3748;
    margin-bottom: 0.5rem;
}

.quiz-header p {
    color: #718096;
}

.quiz-progress {
    margin-bottom: 2rem;
}

.quiz-progress-bar {
    width: 100%;
    height: 8px;
    background: #e2e8f0;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.quiz-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #3182ce, #48bb78);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.quiz-progress-text {
    text-align: center;
    color: #718096;
    font-size: 0.9rem;
}

.question-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    margin-bottom: 1.5rem;
}

.question-number {
    font-size: 0.85rem;
    color: #718096;
    margin-bottom: 0.5rem;
}

.question-text {
    font-size: 1.1rem;
    color: #2d3748;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.options-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.option-btn {
    display: flex;
    align-items: center;
    padding: 1rem 1.25rem;
    background: #f7fafc;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1rem;
    color: #2d3748;
    text-align: left;
}

.option-btn:hover {
    border-color: #3182ce;
    background: #ebf8ff;
}

.option-btn.selected {
    border-color: #3182ce;
    background: #ebf8ff;
}

.option-btn.correct {
    border-color: #48bb78;
    background: #f0fff4;
}

.option-btn.incorrect {
    border-color: #fc8181;
    background: #fff5f5;
}

.option-letter {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: #e2e8f0;
    border-radius: 50%;
    margin-right: 0.75rem;
    font-weight: 600;
    font-size: 0.85rem;
}

.option-btn.selected .option-letter {
    background: #3182ce;
    color: white;
}

.option-btn.correct .option-letter {
    background: #48bb78;
    color: white;
}

.option-btn.incorrect .option-letter {
    background: #fc8181;
    color: white;
}

.fill-blank-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    color: #2d3748;
    transition: border-color 0.2s;
}

.fill-blank-input:focus {
    outline: none;
    border-color: #3182ce;
}

.fill-blank-input.correct {
    border-color: #48bb78;
    background: #f0fff4;
}

.fill-blank-input.incorrect {
    border-color: #fc8181;
    background: #fff5f5;
}

.quiz-navigation {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 2rem;
}

.nav-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-btn.primary {
    background: #3182ce;
    color: white;
}

.nav-btn.primary:hover {
    background: #2c5282;
}

.nav-btn.secondary {
    background: #e2e8f0;
    color: #4a5568;
}

.nav-btn.secondary:hover {
    background: #cbd5e0;
}

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

/* Results Section */
.quiz-results {
    text-align: center;
    padding: 3rem 2rem;
}

.results-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.results-score {
    font-size: 3rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 0.5rem;
}

.results-label {
    font-size: 1.2rem;
    color: #718096;
    margin-bottom: 2rem;
}

.results-message {
    font-size: 1.1rem;
    color: #4a5568;
    margin-bottom: 2rem;
}

.results-stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
}

.stat-label {
    font-size: 0.85rem;
    color: #718096;
}

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

.quiz-day-select {
    margin-bottom: 2rem;
}

.quiz-day-select select {
    padding: 0.75rem 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    color: #2d3748;
    background: white;
    cursor: pointer;
}

.quiz-day-select select:focus {
    outline: none;
    border-color: #3182ce;
}

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

    .question-card {
        padding: 1.5rem;
    }

    .quiz-navigation {
        flex-direction: column;
    }

    .nav-btn {
        width: 100%;
        justify-content: center;
    }
}