/* Quiz Whiz - Utilities and Responsive Design | Helper classes, animations, responsive breakpoints, and utility styles used across all pages */

/* Mixed Study Mode Styles */
.mixed-controls {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.mixed-settings {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 1.5rem 0;
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.setting-group label {
    font-weight: 600;
    color: var(--text-color);
}

.setting-group input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    outline: none;
}

.setting-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.setting-group input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.mixed-session {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}

.session-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

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

.progress-bar {
    flex: 1;
    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));
    border-radius: 4px;
    transition: width 0.3s ease;
    width: 0%;
}

.session-stats {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.mode-indicator {
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.mode-indicator.quiz-mode {
    background: var(--secondary-color);
}

.mixed-content {
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2rem;
}

.mixed-controls-active {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.mixed-results {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    text-align: center;
}

.results-summary {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    max-height: 390px;
}

.result-item {
    background: var(--background-color);
    padding: 1rem;
    border-radius: var(--border-radius);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.result-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.result-item span:last-child {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

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

/* Mixed mode flashcard styles */
.mixed-flashcard {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: var(--transition);
    min-height: 300px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: center;
    position: relative;
}

.mixed-flashcard:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.mixed-flashcard.flipped {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.mixed-quiz {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}

.mixed-quiz .question {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.mixed-quiz .options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mixed-quiz .option {
    background: var(--background-color);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
}

.mixed-quiz .option:hover {
    border-color: var(--primary-color);
    background: rgba(102, 126, 234, 0.1);
}

.mixed-quiz .option.selected {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: white;
}

.mixed-quiz .option.correct {
    border-color: #10b981;
    background: #10b981;
    color: white;
}

.mixed-quiz .option.incorrect {
    border-color: #ef4444;
    background: #ef4444;
    color: white;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Responsive Design */
@media (max-width: 768px) {
    .navbar {
        padding: 1rem;
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav-btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .quick-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .flashcard-inner {
        height: 300px;
    }
    
    .card-content p {
        font-size: 1.25rem;
    }
    
    .flashcard-navigation {
        flex-direction: column;
        gap: 1rem;
    }
    
    .difficulty-buttons {
        flex-wrap: wrap;
    }
    
    .upload-methods {
        grid-template-columns: 1fr;
    }
    
    .data-actions {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 0.75rem;
    }
    
    .data-actions .btn {
        min-height: 3rem;
        padding: 0.875rem 1.25rem;
        font-size: 0.9rem;
    }
    
    .quiz-controls {
        flex-direction: column;
        gap: 1rem;
    }
    
    .quiz-actions {
        flex-direction: column;
    }
    
    .toast-container {
        top: 1rem;
        right: 1rem;
        left: 1rem;
    }
    
    .toast {
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .section-header {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .flashcard-controls {
        flex-direction: column;
        gap: 1rem;
    }
    
    .file-upload-area {
        padding: 2rem 1rem;
    }
    
    .results-summary {
        grid-template-columns: 1fr;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .loading-overlay,
    .toast-container {
        display: none !important;
    }
    
    .main-content {
        padding: 0;
        max-width: none;
    }
    
    .content-section {
        display: block !important;
    }
    
    /* Hide interactive buttons when printing */
    .flashcard-navigation .btn,
    .difficulty-buttons .btn,
    .quiz-controls .btn {
        display: none;
    }
    
    /* Flatten flashcards for printing */
    .flashcard-inner {
        transform: none !important;
        height: auto;
    }
    
    .flashcard-back {
        transform: none !important;
        position: relative;
        margin-top: 2rem;
        backface-visibility: visible;
    }
    
    .flashcard-front {
        backface-visibility: visible;
    }
}