/* Vocabulary Quiz Mode Styles */

/* Quiz Button in Header */
.quiz-button {
    background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    padding: 10px 16px;
    font-family: 'Poppins', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
    position: relative;
}

.quiz-button:hover {
    background: linear-gradient(135deg, #45a049 0%, #3d8b40 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
}

.quiz-button:disabled {
    background: var(--border-color);
    cursor: not-allowed;
    opacity: 0.6;
}

.quiz-due-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #FF5722;
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 18px;
    animation: pulse 2s ease-in-out infinite;
}

/* Quiz Panel (Full Screen Overlay) */
.quiz-panel {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, var(--background) 0%, rgba(200, 90, 58, 0.03) 100%);
    z-index: 1100;
    display: flex;
    flex-direction: column;
    animation: fadeIn 0.3s ease;
}

.quiz-panel.hidden {
    display: none;
}

/* Quiz Header */
.quiz-header {
    background: var(--surface);
    border-bottom: 2px solid var(--border-color);
    padding: var(--spacing-md) var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.quiz-header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.quiz-close-btn {
    background: transparent;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.quiz-close-btn:hover {
    border-color: var(--primary-color);
    background: rgba(200, 90, 58, 0.05);
}

.quiz-close-btn svg {
    width: 20px;
    height: 20px;
    stroke: var(--text-secondary);
}

.quiz-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 0;
}

.quiz-mode-toggle {
    display: flex;
    gap: var(--spacing-xs);
    background: var(--background);
    padding: 4px;
    border-radius: var(--border-radius);
    border: 2px solid var(--border-color);
}

.quiz-mode-btn {
    background: transparent;
    border: none;
    border-radius: calc(var(--border-radius) - 4px);
    padding: 8px 16px;
    font-family: 'Poppins', sans-serif;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-secondary);
}

.quiz-mode-btn:hover {
    background: rgba(200, 90, 58, 0.05);
    color: var(--text-primary);
}

.quiz-mode-btn.active {
    background: var(--primary-color);
    color: white;
}

.quiz-header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

/* Quiz Stats Bar */
.quiz-stats-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

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

.quiz-stat-value {
    font-family: 'Outfit', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1;
}

.quiz-stat-value.correct {
    color: #4CAF50;
}

.quiz-stat-value.incorrect {
    color: #E8725A;
}

.quiz-stat-value.streak {
    color: #FF9800;
}

.quiz-stat-label {
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.quiz-progress-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    min-width: 200px;
}

.quiz-progress-track {
    flex: 1;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.quiz-progress-fill {
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.quiz-progress-text {
    font-family: 'Outfit', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    min-width: 50px;
    text-align: right;
}

/* Quiz Main Content */
.quiz-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    overflow-y: auto;
}

/* Flashcard */
.quiz-flashcard {
    background: var(--surface);
    border: 3px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl) var(--spacing-xl);
    width: 100%;
    max-width: 600px;
    min-height: 320px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
    position: relative;
}

.quiz-flashcard:hover {
    border-color: var(--primary-light);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(200, 90, 58, 0.15);
}

.quiz-flashcard.correct {
    border-color: #4CAF50;
    background: linear-gradient(180deg, rgba(76, 175, 80, 0.05) 0%, var(--surface) 100%);
    animation: correctPulse 0.5s ease;
}

.quiz-flashcard.incorrect {
    border-color: #E8725A;
    background: linear-gradient(180deg, rgba(232, 114, 90, 0.05) 0%, var(--surface) 100%);
    animation: incorrectShake 0.5s ease;
}

@keyframes correctPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

@keyframes incorrectShake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

.quiz-direction-label {
    position: absolute;
    top: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
    background: var(--background);
    padding: 4px 12px;
    border-radius: 12px;
}

.quiz-word {
    font-family: 'Outfit', sans-serif;
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
}

.quiz-input-container {
    width: 100%;
    max-width: 400px;
    margin-bottom: var(--spacing-lg);
}

.quiz-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: 'Poppins', sans-serif;
    font-size: 1.25rem;
    text-align: center;
    transition: all 0.2s ease;
}

.quiz-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(200, 90, 58, 0.1);
}

.quiz-input.correct {
    border-color: #4CAF50;
    background: rgba(76, 175, 80, 0.05);
}

.quiz-input.incorrect {
    border-color: #E8725A;
    background: rgba(232, 114, 90, 0.05);
}

.quiz-hint {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.quiz-answer-reveal {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    animation: fadeIn 0.3s ease;
}

.quiz-answer-reveal.correct {
    color: #4CAF50;
}

.quiz-answer-reveal.incorrect {
    color: #E8725A;
}

.quiz-correct-answer {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.quiz-correct-answer strong {
    color: #4CAF50;
    font-weight: 600;
}

/* Quiz Actions */
.quiz-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    width: 100%;
    max-width: 400px;
}

.quiz-btn {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.2s ease;
}

.quiz-btn-submit {
    background: var(--primary-color);
    color: white;
    border: none;
}

.quiz-btn-submit:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.quiz-btn-submit:disabled {
    background: var(--border-color);
    cursor: not-allowed;
    transform: none;
}

.quiz-btn-skip {
    background: transparent;
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
}

.quiz-btn-skip:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.quiz-btn-next {
    background: var(--primary-color);
    color: white;
    border: none;
}

.quiz-btn-next:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
}

/* Self-rating buttons (for flashcard mode) */
.quiz-rating-buttons {
    display: flex;
    gap: var(--spacing-md);
    width: 100%;
    max-width: 500px;
}

.quiz-rating-btn {
    flex: 1;
    padding: var(--spacing-md);
    font-family: 'Poppins', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.2s ease;
}

.quiz-rating-btn.again {
    background: rgba(232, 114, 90, 0.15);
    color: #E8725A;
    border: 2px solid rgba(232, 114, 90, 0.3);
}

.quiz-rating-btn.again:hover {
    background: rgba(232, 114, 90, 0.25);
    border-color: #E8725A;
}

.quiz-rating-btn.hard {
    background: rgba(255, 152, 0, 0.15);
    color: #FF9800;
    border: 2px solid rgba(255, 152, 0, 0.3);
}

.quiz-rating-btn.hard:hover {
    background: rgba(255, 152, 0, 0.25);
    border-color: #FF9800;
}

.quiz-rating-btn.good {
    background: rgba(76, 175, 80, 0.15);
    color: #4CAF50;
    border: 2px solid rgba(76, 175, 80, 0.3);
}

.quiz-rating-btn.good:hover {
    background: rgba(76, 175, 80, 0.25);
    border-color: #4CAF50;
}

.quiz-rating-btn.easy {
    background: rgba(33, 150, 243, 0.15);
    color: #2196F3;
    border: 2px solid rgba(33, 150, 243, 0.3);
}

.quiz-rating-btn.easy:hover {
    background: rgba(33, 150, 243, 0.25);
    border-color: #2196F3;
}

.quiz-show-answer-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    padding: var(--spacing-md) var(--spacing-xl);
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-bottom: var(--spacing-lg);
}

.quiz-show-answer-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
}

/* Quiz Streak Animation */
.quiz-streak-display {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 6px 12px;
    background: linear-gradient(135deg, rgba(255, 152, 0, 0.15) 0%, rgba(255, 193, 7, 0.15) 100%);
    border: 2px solid rgba(255, 152, 0, 0.3);
    border-radius: 20px;
}

.quiz-streak-flame {
    font-size: 1.25rem;
    animation: flamePulse 1s ease-in-out infinite;
}

.quiz-streak-count {
    font-family: 'Outfit', sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
    color: #FF9800;
}

/* Quiz Completion Screen */
.quiz-completion {
    width: 100%;
    max-width: 600px;
    text-align: center;
    animation: slideUpScale 0.4s ease-out;
}

.quiz-completion-icon {
    font-size: 5rem;
    margin-bottom: var(--spacing-md);
}

.quiz-completion-title {
    font-family: 'Outfit', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.quiz-completion-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.quiz-completion-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.quiz-completion-stat {
    background: var(--surface);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
}

.quiz-completion-stat-value {
    font-family: 'Outfit', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 4px;
}

.quiz-completion-stat-value.accuracy {
    color: var(--primary-color);
}

.quiz-completion-stat-value.correct {
    color: #4CAF50;
}

.quiz-completion-stat-value.incorrect {
    color: #E8725A;
}

.quiz-completion-stat-value.streak {
    color: #FF9800;
}

.quiz-completion-stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.quiz-completion-streak-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-md);
    background: linear-gradient(135deg, rgba(200, 90, 58, 0.1) 0%, rgba(232, 114, 90, 0.1) 100%);
    border: 2px solid rgba(200, 90, 58, 0.2);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.quiz-completion-streak-icon {
    font-size: 2.5rem;
}

.quiz-completion-streak-text {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 600;
}

.quiz-completion-streak-text span {
    color: var(--primary-color);
    font-weight: 700;
}

.quiz-completion-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-width: 300px;
    margin: 0 auto;
}

.quiz-completion-btn {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.2s ease;
}

.quiz-completion-btn.primary {
    background: var(--primary-color);
    color: white;
    border: none;
}

.quiz-completion-btn.primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
}

.quiz-completion-btn.secondary {
    background: transparent;
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
}

.quiz-completion-btn.secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Quiz Loading / Empty States */
.quiz-loading,
.quiz-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xl);
}

.quiz-loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-md);
}

.quiz-empty-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.quiz-empty-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.quiz-empty-message {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    max-width: 400px;
}

.quiz-empty-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    padding: var(--spacing-md) var(--spacing-xl);
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.quiz-empty-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
}

/* Responsive */
@media (max-width: 768px) {
    .quiz-header {
        padding: var(--spacing-md);
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }

    .quiz-header-left {
        flex: 1 1 100%;
    }

    .quiz-title {
        font-size: 1.25rem;
    }

    .quiz-mode-toggle {
        display: none;
    }

    .quiz-header-right {
        flex: 1 1 100%;
        justify-content: space-between;
    }

    .quiz-progress-bar {
        min-width: 120px;
    }

    .quiz-flashcard {
        min-height: 280px;
        padding: var(--spacing-lg);
    }

    .quiz-word {
        font-size: 2.5rem;
    }

    .quiz-completion-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .quiz-rating-buttons {
        flex-wrap: wrap;
    }

    .quiz-rating-btn {
        flex: 1 1 45%;
    }
}