:root {
    --primary-blue: #2196F3;
    --success-green: #4CAF50;
    --warning-amber: #FFC107;
    --error-red: #F44336;
    --accent-purple: #9C27B0;
    --light-gray: #f5f5f5;
    --dark-gray: #333;
    --white: #ffffff;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    font-size: 18px;
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--light-gray);
    padding-bottom: 80px;
}

/* Header */
.app-header {
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-purple));
    color: var(--white);
    text-align: center;
    padding: 20px;
    box-shadow: var(--shadow);
}

.app-header h1 {
    font-size: 24px;
    margin-bottom: 5px;
}

.app-header p {
    opacity: 0.9;
    font-size: 16px;
}

/* Main Content */
.app-main {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.section {
    display: none;
    animation: fadeIn 0.3s ease-in;
}

.section.active {
    display: block;
}

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

.section-header {
    text-align: center;
    margin-bottom: 30px;
}

.section-header h2 {
    font-size: 28px;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

.section-header p {
    color: #666;
    font-size: 16px;
}

/* Welcome Card */
.welcome-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 30px;
    text-align: center;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.welcome-card h2 {
    color: var(--primary-blue);
    margin-bottom: 15px;
}

.quick-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 15px;
    margin-top: 25px;
}

.action-btn {
    background: var(--white);
    border: 2px solid var(--primary-blue);
    color: var(--primary-blue);
    padding: 20px 15px;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.action-btn:hover {
    background: var(--primary-blue);
    color: var(--white);
    transform: translateY(-2px);
}

.action-btn i {
    font-size: 24px;
}

.emergency-btn {
    border-color: var(--error-red);
    color: var(--error-red);
}

.emergency-btn:hover {
    background: var(--error-red);
    color: var(--white);
}

/* Buttons */
.primary-btn, .success-btn, .secondary-btn, .emergency-submit-btn {
    padding: 15px 25px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
    margin: 10px 0;
}

.primary-btn {
    background: var(--primary-blue);
    color: var(--white);
}

.primary-btn:hover {
    background: #1976D2;
    transform: translateY(-1px);
}

.success-btn {
    background: var(--success-green);
    color: var(--white);
}

.success-btn:hover {
    background: #388E3C;
}

.secondary-btn {
    background: var(--light-gray);
    color: var(--dark-gray);
    border: 1px solid #ddd;
}

.secondary-btn:hover {
    background: #e0e0e0;
}

.emergency-submit-btn {
    background: var(--error-red);
    color: var(--white);
}

.emergency-submit-btn:hover {
    background: #d32f2f;
}

/* Forms */
input, select, textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 16px;
    margin: 10px 0;
    transition: var(--transition);
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

/* Tutorial Styles */
.tutorial-categories {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    overflow-x: auto;
    padding-bottom: 10px;
}

.category-btn {
    padding: 10px 20px;
    border: 2px solid var(--primary-blue);
    background: var(--white);
    color: var(--primary-blue);
    border-radius: 25px;
    font-size: 14px;
    cursor: pointer;
    white-space: nowrap;
    transition: var(--transition);
}

.category-btn.active, .category-btn:hover {
    background: var(--primary-blue);
    color: var(--white);
}

.tutorials-list {
    display: grid;
    gap: 15px;
}

.tutorial-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: var(--transition);
}

.tutorial-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.tutorial-card h3 {
    color: var(--primary-blue);
    margin-bottom: 10px;
}

.tutorial-card .difficulty {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 12px;
    font-weight: 600;
    margin-top: 10px;
}

.difficulty.easy {
    background: #E8F5E8;
    color: var(--success-green);
}

.difficulty.medium {
    background: #FFF8E1;
    color: #F57C00;
}

.difficulty.hard {
    background: #FFEBEE;
    color: var(--error-red);
}

/* Modal Styles */
.tutorial-modal, .safety-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    padding: 20px;
}

.modal-content {
    background: var(--white);
    border-radius: var(--border-radius);
    max-width: 600px;
    max-height: 90vh;
    margin: 50px auto;
    position: relative;
    overflow-y: auto;
}

.close-modal {
    position: absolute;
    top: 15px;
    right: 20px;
    background: none;
    border: none;
    font-size: 30px;
    cursor: pointer;
    color: #999;
    z-index: 1001;
}

.close-modal:hover {
    color: var(--error-red);
}

.tutorial-content, .lesson-content {
    padding: 60px 30px 30px;
}

.tutorial-step {
    margin-bottom: 25px;
    padding: 20px;
    background: var(--light-gray);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-blue);
}

.tutorial-step h4 {
    color: var(--primary-blue);
    margin-bottom: 10px;
}

/* Troubleshooting Styles */
.problem-form {
    background: var(--white);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.solution-container {
    background: var(--white);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 20px;
    border-left: 4px solid var(--success-green);
}

.solution-steps {
    list-style: none;
    counter-reset: step-counter;
}

.solution-steps li {
    counter-increment: step-counter;
    margin-bottom: 15px;
    padding-left: 40px;
    position: relative;
}

.solution-steps li::before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 0;
    background: var(--primary-blue);
    color: var(--white);
    width: 25px;
    height: 25px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
}

.help-history {
    background: var(--white);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.history-item {
    padding: 15px;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.history-item:last-child {
    border-bottom: none;
}

.history-status {
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 12px;
    font-weight: 600;
}

.history-status.solved {
    background: #E8F5E8;
    color: var(--success-green);
}

.history-status.pending {
    background: #FFF8E1;
    color: #F57C00;
}

/* Safety Styles */
.safety-lessons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.lesson-card {
    background: var(--white);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.lesson-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.lesson-card h3 {
    color: var(--primary-blue);
    margin-bottom: 15px;
}

.lesson-btn {
    background: var(--primary-blue);
    color: var(--white);
    border: none;
    padding: 12px 25px;
    border-radius: var(--border-radius);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 15px;
}

.lesson-btn:hover {
    background: #1976D2;
}

.quiz-section {
    background: var(--white);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-top: 20px;
}

.quiz-question {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--dark-gray);
}

.quiz-options {
    display: grid;
    gap: 10px;
    margin-bottom: 20px;
}

.quiz-option {
    padding: 15px;
    border: 2px solid #ddd;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    background: var(--white);
}

.quiz-option:hover {
    border-color: var(--primary-blue);
}

.quiz-option.selected {
    border-color: var(--primary-blue);
    background: rgba(33, 150, 243, 0.1);
}

.quiz-option.correct {
    border-color: var(--success-green);
    background: rgba(76, 175, 80, 0.1);
}

.quiz-option.incorrect {
    border-color: var(--error-red);
    background: rgba(244, 67, 54, 0.1);
}

.quiz-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
}

.question-counter {
    font-weight: 600;
    color: var(--primary-blue);
}

.quiz-results {
    text-align: center;
    padding: 20px;
    background: var(--light-gray);
    border-radius: var(--border-radius);
    margin-top: 20px;
}

.quiz-score {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 10px;
}

.quiz-score.excellent {
    color: var(--success-green);
}

.quiz-score.good {
    color: var(--primary-blue);
}

.quiz-score.needs-improvement {
    color: var(--warning-amber);
}

/* Communication Styles */
.communication-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.comm-card {
    background: var(--white);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
}

.comm-btn {
    background: var(--primary-blue);
    color: var(--white);
    border: none;
    padding: 12px 25px;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    margin-top: 15px;
}

.comm-btn:hover {
    background: #1976D2;
}

.contacts-section, .messages-section, .video-guide-section {
    background: var(--white);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-top: 20px;
}

.add-contact-form {
    display: grid;
    gap: 15px;
    margin-bottom: 25px;
    padding-bottom: 25px;
    border-bottom: 1px solid #eee;
}

.contacts-list {
    display: grid;
    gap: 15px;
}

.contact-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: var(--light-gray);
    border-radius: var(--border-radius);
}

.contact-info h4 {
    color: var(--primary-blue);
    margin-bottom: 5px;
}

.contact-info p {
    color: #666;
    font-size: 14px;
}

.contact-actions {
    display: flex;
    gap: 10px;
}

.contact-btn {
    padding: 8px 12px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 12px;
    transition: var(--transition);
}

.call-btn {
    background: var(--success-green);
    color: var(--white);
}

.delete-btn {
    background: var(--error-red);
    color: var(--white);
}

.message-templates {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 25px;
}

.message-template {
    padding: 15px;
    border: 2px solid var(--primary-blue);
    background: var(--white);
    color: var(--primary-blue);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.message-template:hover {
    background: var(--primary-blue);
    color: var(--white);
}

.custom-message {
    border-top: 1px solid #eee;
    padding-top: 25px;
}

.guide-steps {
    display: grid;
    gap: 20px;
}

.step {
    padding: 20px;
    background: var(--light-gray);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-blue);
}

.step h4 {
    color: var(--primary-blue);
    margin-bottom: 10px;
}

/* Emergency Styles */
.emergency-contacts {
    margin-bottom: 30px;
}

.emergency-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.emergency-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 25px 15px;
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--white);
    font-weight: 600;
    transition: var(--transition);
    text-align: center;
}

.emergency-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.emergency-btn i {
    font-size: 32px;
}

.emergency-btn.samu {
    background: var(--error-red);
}

.emergency-btn.police {
    background: #1565C0;
}

.emergency-btn.fire {
    background: #D84315;
}

.emergency-btn.defesa {
    background: var(--warning-amber);
    color: var(--dark-gray);
}

.tech-help-section {
    background: var(--white);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.help-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.help-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 20px;
    border: 2px solid var(--primary-blue);
    background: var(--white);
    color: var(--primary-blue);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.help-btn:hover {
    background: var(--primary-blue);
    color: var(--white);
}

.help-btn i {
    font-size: 24px;
}

.help-request-form, .help-status {
    background: var(--white);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-top: 20px;
}

.status-content {
    padding: 20px;
    background: var(--light-gray);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--success-green);
}

/* FAQ Styles */
.faq-section {
    background: var(--white);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin: 30px 0;
}

.faq-section h2 {
    text-align: center;
    color: var(--primary-blue);
    margin-bottom: 25px;
}

.faq-container {
    display: grid;
    gap: 15px;
}

.faq-item {
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: 20px;
    background: var(--light-gray);
    border: none;
    text-align: left;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-question:hover {
    background: #e8e8e8;
}

.faq-question[aria-expanded="true"] {
    background: var(--primary-blue);
    color: var(--white);
}

.faq-icon {
    font-size: 20px;
    font-weight: bold;
    transition: var(--transition);
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 20px;
    background: var(--white);
    border-top: 1px solid #ddd;
    animation: slideDown 0.3s ease-out;
}

.faq-answer[hidden] {
    display: none;
}

@keyframes slideDown {
    from {
        opacity: 0;
        max-height: 0;
        padding-top: 0;
        padding-bottom: 0;
    }
    to {
        opacity: 1;
        max-height: 200px;
        padding-top: 20px;
        padding-bottom: 20px;
    }
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--white);
    display: flex;
    justify-content: space-around;
    padding: 10px 0;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
    z-index: 100;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: #666;
    font-size: 12px;
    padding: 8px;
    border-radius: 8px;
    transition: var(--transition);
    min-width: 60px;
}

.nav-item i {
    font-size: 20px;
    margin-bottom: 4px;
}

.nav-item.active {
    color: var(--primary-blue);
    background: rgba(33, 150, 243, 0.1);
}

.nav-item:hover {
    color: var(--primary-blue);
}

/* Footer */
footer {
    text-align: center;
    padding: 20px;
    background: var(--dark-gray);
    color: var(--white);
    font-size: 14px;
    margin-top: 40px;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        font-size: 16px;
    }
    
    .app-header h1 {
        font-size: 20px;
    }
    
    .section-header h2 {
        font-size: 24px;
    }
    
    .quick-actions {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tutorial-categories {
        justify-content: flex-start;
    }
    
    .emergency-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .help-options {
        grid-template-columns: 1fr;
    }
    
    .quiz-controls {
        flex-direction: column;
        gap: 15px;
    }
    
    .modal-content {
        margin: 20px auto;
        max-height: 85vh;
    }
    
    .tutorial-content, .lesson-content {
        padding: 40px 20px 20px;
    }
}

@media (max-width: 480px) {
    .app-main {
        padding: 15px;
    }
    
    .welcome-card {
        padding: 20px;
    }
    
    .quick-actions {
        grid-template-columns: 1fr;
    }
    
    .action-btn {
        padding: 15px;
    }
    
    .emergency-grid {
        grid-template-columns: 1fr;
    }
    
    .communication-options {
        grid-template-columns: 1fr;
    }
    
    .safety-lessons {
        grid-template-columns: 1fr;
    }
    
    .message-templates {
        grid-template-columns: 1fr;
    }
    
    .nav-item {
        font-size: 10px;
        min-width: 50px;
    }
    
    .nav-item i {
        font-size: 18px;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --shadow: 0 2px 10px rgba(0,0,0,0.3);
    }
    
    .action-btn, .category-btn, .help-btn, .message-template {
        border-width: 3px;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --light-gray: #1a1a1a;
        --white: #2d2d2d;
        --dark-gray: #ffffff;
        --shadow: 0 2px 10px rgba(0,0,0,0.3);
    }
    
    body {
        background-color: #121212;
        color: var(--dark-gray);
    }
    
    .faq-question {
        background: #333;
        color: var(--dark-gray);
    }
    
    .faq-question:hover {
        background: #404040;
    }
    
    .faq-answer {
        background: var(--white);
        border-top-color: #555;
    }
    
    .bottom-nav {
        background: var(--white);
        border-top: 1px solid #555;
    }
}