/* App Specific Styles */
body {
    background: var(--off-white);
    overflow: hidden;
}

/* App Navigation */
.app-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: var(--shadow-sm);
    z-index: 100;
    padding: 16px 0;
}

.app-nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--dark-blue);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.back-btn:hover {
    color: var(--primary-violet);
}

.app-nav-left {
    display: flex;
    align-items: center;
    gap: 24px;
}

.app-logo-text {
    font-size: 24px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-violet), var(--primary-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

.app-logo-text:hover {
    transform: scale(1.05);
}

.user-score {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 18px;
    color: var(--primary-violet);
}

.user-score i {
    color: #FFC107;
}

.register-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, var(--primary-violet), var(--primary-blue));
    color: var(--white);
    border: none;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-left: 16px;
}

.register-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* App Container */
.app-container {
    margin-top: 72px;
    height: calc(100vh - 72px);
    overflow-y: auto;
}

/* Screens */
.screen {
    min-height: calc(100vh - 72px);
    display: none;
    animation: fadeIn 0.5s ease;
}

.screen.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Welcome Screen */
.welcome-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 60px 20px;
    text-align: center;
}

.welcome-title {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--primary-violet), var(--primary-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.welcome-description {
    font-size: 18px;
    color: #666;
    margin-bottom: 48px;
}

.category-selection h2 {
    font-size: 28px;
    margin-bottom: 32px;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.category-card {
    background: var(--white);
    border: 2px solid transparent;
    border-radius: var(--border-radius-lg);
    padding: 32px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, var(--primary-violet), var(--primary-blue));
    border-radius: var(--border-radius-lg);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

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

.category-card:hover::before {
    opacity: 1;
}

.category-card i {
    font-size: 48px;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--primary-violet), var(--primary-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.category-card h3 {
    font-size: 20px;
    margin-bottom: 8px;
    font-weight: 700;
}

.category-card p {
    font-size: 14px;
    color: #666;
}

/* Quiz Screen */
.quiz-header {
    background: var(--white);
    padding: 24px;
    margin: 20px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.quiz-progress {
    flex: 1;
}

.progress-bar {
    width: 100%;
    max-width: 300px;
    height: 8px;
    background: var(--gray-footer);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-violet), var(--primary-blue));
    width: 0%;
    transition: width 0.5s ease;
}

.progress-text {
    font-size: 14px;
    color: #666;
}

.quiz-timer {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 18px;
    font-weight: 600;
    color: var(--dark-blue);
}

.quiz-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}



.question-card {
    background: var(--white);
    padding: 40px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: 32px;
    text-align: center;
}

#questionText {
    font-size: 24px;
    line-height: 1.4;
    color: var(--dark-blue);
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 32px;
}

.option-btn {
    background: var(--white);
    border: 2px solid var(--gray-footer);
    border-radius: var(--border-radius);
    padding: 24px;
    text-align: left;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 16px;
    font-weight: 500;
    color: var(--dark-blue);
    position: relative;
    overflow: hidden;
}

.option-btn:hover {
    border-color: var(--primary-violet);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.option-btn.selected {
    border-color: var(--primary-violet);
    background: linear-gradient(135deg, rgba(108, 92, 231, 0.1), rgba(116, 185, 255, 0.1));
}

.option-btn.correct {
    border-color: #4CAF50;
    background: var(--success-light);
    animation: correctPulse 0.5s ease;
}

.option-btn.incorrect {
    border-color: #F44336;
    background: var(--error-light);
    animation: shake 0.5s ease;
}

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

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

.quiz-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.skip-btn,
.next-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 16px;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.skip-btn {
    background: var(--white);
    color: #666;
    border: 2px solid var(--gray-footer);
}

.skip-btn:hover {
    border-color: #666;
    color: var(--dark-blue);
}

.next-btn {
    background: linear-gradient(135deg, var(--primary-violet), var(--primary-blue));
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.next-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Results Screen */
.results-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 60px 20px;
    text-align: center;
}

.results-animation {
    position: relative;
    margin-bottom: 40px;
}

.trophy-icon {
    width: 120px;
    height: 120px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-violet), var(--primary-blue));
    border-radius: 50%;
    animation: bounceIn 1s ease;
}

.trophy-icon i {
    font-size: 60px;
    color: var(--white);
}

@keyframes bounceIn {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    50% {
        transform: scale(1.2);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.results-title {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--primary-violet), var(--primary-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.results-message {
    font-size: 18px;
    color: #666;
    margin-bottom: 48px;
}

.results-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.stat-card {
    background: var(--white);
    padding: 24px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.stat-card i {
    font-size: 32px;
    margin-bottom: 12px;
}

.stat-card .fa-check-circle {
    color: #4CAF50;
}

.stat-card .fa-times-circle {
    color: #F44336;
}

.stat-card .fa-percentage {
    color: var(--primary-violet);
}

.stat-card .fa-clock {
    color: var(--primary-blue);
}

.stat-value {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 14px;
    color: #666;
}

.results-feedback {
    background: var(--off-white);
    padding: 32px;
    border-radius: var(--border-radius-lg);
    margin-bottom: 48px;
    text-align: left;
}

.results-feedback h3 {
    font-size: 20px;
    margin-bottom: 16px;
}

.feedback-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.feedback-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--white);
    border-radius: var(--border-radius);
}

.feedback-item i {
    color: var(--primary-violet);
}

.results-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 48px;
}

.share-results p {
    margin-bottom: 16px;
    color: #666;
}

.share-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.share-btn {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: none;
    background: var(--gray-footer);
    color: var(--dark-blue);
    font-size: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.share-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.share-btn[data-platform="twitter"]:hover {
    background: #1DA1F2;
    color: var(--white);
}

.share-btn[data-platform="facebook"]:hover {
    background: #1877F2;
    color: var(--white);
}

.share-btn[data-platform="whatsapp"]:hover {
    background: #25D366;
    color: var(--white);
}

.share-btn[data-platform="linkedin"]:hover {
    background: #0A66C2;
    color: var(--white);
}



/* Responsive Design */
@media (max-width: 768px) {
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .options-grid {
        grid-template-columns: 1fr;
    }
    
    .results-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .quiz-header {
        flex-direction: column;
        gap: 16px;
    }
    
    .progress-bar {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .category-grid {
        grid-template-columns: 1fr;
    }
    
    .welcome-title {
        font-size: 28px;
    }
    
    .question-card {
        padding: 24px;
    }
    
    #questionText {
        font-size: 20px;
    }
    
    .results-title {
        font-size: 32px;
    }
    
    .share-buttons {
        flex-wrap: wrap;
    }
    
    .app-logo-text {
        font-size: 20px;
    }
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background-color: var(--white);
    margin: 5% auto;
    padding: 0;
    border-radius: var(--border-radius-lg);
    width: 90%;
    max-width: 600px;
    box-shadow: var(--shadow-xl);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 32px;
    border-bottom: 1px solid var(--gray-footer);
}

.modal-header h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--dark-blue);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    color: #666;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: var(--gray-footer);
    color: var(--dark-blue);
}

.modal-body {
    padding: 32px;
}

.form-container {
    margin-bottom: 24px;
}

.form-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    border-top: 1px solid var(--gray-footer);
}

.checkbox-container {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    font-weight: 500;
    color: var(--dark-blue);
}

.checkbox-container input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--primary-violet);
    border-radius: 4px;
    position: relative;
    transition: all 0.3s ease;
}

.checkbox-container input[type="checkbox"]:checked + .checkmark {
    background: var(--primary-violet);
}

.checkbox-container input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--white);
    font-size: 14px;
    font-weight: bold;
}

#modalCompleteBtn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

@media (max-width: 768px) {
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
    
    .modal-header {
        padding: 20px 24px;
    }
    
    .modal-body {
        padding: 24px;
    }
    
    .form-footer {
        flex-direction: column;
        gap: 16px;
        align-items: stretch;
    }
}

/* Terms and Privacy Notice */
.terms-notice {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--white);
    border-top: 2px solid var(--primary-violet);
    box-shadow: 0 -4px 20px rgba(0,0,0,0.1);
    z-index: 200;
    padding: 20px;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.terms-notice.show {
    transform: translateY(0);
}

.notice-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.notice-content p {
    margin: 0;
    color: var(--dark-blue);
    font-size: 14px;
    line-height: 1.5;
}

.notice-link {
    color: var(--primary-violet);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.notice-link:hover {
    color: var(--primary-blue);
    text-decoration: underline;
}

/* Markdown Content Styles */
.markdown-content {
    max-height: 60vh;
    overflow-y: auto;
    padding: 20px;
    line-height: 1.6;
    color: var(--dark-blue);
}

.markdown-content h1 {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 20px;
    color: var(--primary-violet);
}

.markdown-content h2 {
    font-size: 24px;
    font-weight: 700;
    margin: 30px 0 15px 0;
    color: var(--dark-blue);
}

.markdown-content h3 {
    font-size: 20px;
    font-weight: 600;
    margin: 25px 0 12px 0;
    color: var(--dark-blue);
}

.markdown-content p {
    margin-bottom: 15px;
    text-align: justify;
}

.markdown-content ul, .markdown-content ol {
    margin: 15px 0;
    padding-left: 25px;
}

.markdown-content li {
    margin-bottom: 8px;
}

.markdown-content strong {
    font-weight: 600;
    color: var(--primary-violet);
}

.markdown-content a {
    color: var(--primary-blue);
    text-decoration: none;
}

.markdown-content a:hover {
    text-decoration: underline;
}

.markdown-content hr {
    border: none;
    border-top: 2px solid var(--gray-footer);
    margin: 30px 0;
}

.markdown-content blockquote {
    border-left: 4px solid var(--primary-violet);
    padding-left: 20px;
    margin: 20px 0;
    font-style: italic;
    color: #666;
}

/* Responsive Terms Notice */
@media (max-width: 768px) {
    .notice-content {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .notice-content p {
        font-size: 13px;
    }
    
    .markdown-content {
        max-height: 70vh;
        padding: 15px;
    }
    
    .markdown-content h1 {
        font-size: 24px;
    }
    
    .markdown-content h2 {
        font-size: 20px;
    }
    
    .markdown-content h3 {
        font-size: 18px;
    }
}