/* --- CSS Variables (MediTag Design System) --- */
:root {
    /* Primary Colors */
    --primary-red: #8B0000;
    --primary-red-light: #FF0000;
    --alert-red: #FF3B30;
    --alert-light: #FFEBEE;
    --warning-yellow: #FFCC00;
    --warning-light: #FFF3E0;
    --success-green: #34C759;
    --success-light: rgba(52, 199, 89, 0.1);
    --primary-blue: #007AFF;
    --primary-blue-light: rgba(0, 122, 255, 0.1);
    
    /* Neutral Colors */
    --system-gray-6: #F2F2F7;
    --system-gray-5: #E5E5EA;
    --system-gray-4: #D1D1D6;
    --system-gray-3: #C7C7CC;
    --system-gray-2: #AEAEB2;
    --system-gray-1: #8E8E93;
    --text-primary: #1C1C1E;
    --text-secondary: #8E8E93;
    --text-tertiary: #C7C7CC;
    
    /* UI Elements */
    --card-bg: #FFFFFF;
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --card-shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
    --border-radius-sm: 10px;
    --border-radius-md: 14px;
    --border-radius-lg: 18px;
    --border-radius-xl: 24px;
    --border-radius-full: 999px;
    
    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-xxl: 48px;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-md: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-xxl: 32px;
    --font-size-xxxl: 40px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* --- Reset & Base Styles --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--system-gray-6);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    background-color: white;
    min-height: 100vh;
    box-shadow: 0 0 60px rgba(0, 0, 0, 0.05);
    overflow-x: hidden;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--space-md);
}

.section-title {
    font-size: var(--font-size-xxl);
    text-align: center;
    margin-bottom: var(--space-xl);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(135deg, var(--primary-red) 0%, var(--primary-red-light) 100%);
    border-radius: var(--border-radius-full);
}

.hero-title {
    font-size: var(--font-size-xxxl);
    font-weight: 700;
    margin-bottom: var(--space-md);
    background: linear-gradient(135deg, var(--primary-red) 0%, var(--primary-red-light) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    max-width: 600px;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    border: none;
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: center;
    text-decoration: none;
    -webkit-appearance: none;
    appearance: none;
    font-family: inherit;
}

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

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-red) 0%, var(--primary-red-light) 100%);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #9B0000 0%, #FF1A1A 100%);
}

.btn-outline {
    background: transparent;
    color: var(--primary-red);
    border: 2px solid var(--primary-red);
}

.btn-outline:hover {
    background-color: rgba(139, 0, 0, 0.05);
}

.btn-lg {
    padding: var(--space-lg) var(--space-xl);
    font-size: var(--font-size-lg);
}

/* --- Header --- */
.main-header {
    background: white;
    border-bottom: 1px solid var(--system-gray-5);
    padding: var(--space-md) var(--space-lg);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo i {
    font-size: 28px;
    color: var(--primary-red);
}

.logo h1 {
    font-size: var(--font-size-xl);
    margin: 0;
    background: linear-gradient(135deg, var(--primary-red) 0%, var(--primary-red-light) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.tagline {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    font-weight: 500;
    margin-left: var(--space-sm);
}

.main-nav {
    display: flex;
    gap: var(--space-lg);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    background-color: var(--system-gray-6);
    color: var(--primary-red);
}

/* --- Hero Section --- */
.hero-section {
    padding: var(--space-xxl) var(--space-lg);
    background: linear-gradient(135deg, rgba(139, 0, 0, 0.03) 0%, rgba(255, 0, 0, 0.03) 100%);
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    gap: var(--space-xxl);
}

.hero-text {
    flex: 1;
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.device-mockup {
    width: 320px;
    height: 500px;
    background: white;
    border-radius: var(--border-radius-xl);
    box-shadow: var(--card-shadow-hover);
    overflow: hidden;
    border: 12px solid #1C1C1E;
    position: relative;
}

.device-mockup::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 20px;
    background: #1C1C1E;
    border-bottom-left-radius: 10px;
    border-bottom-right-radius: 10px;
    z-index: 1;
}

.mockup-screen {
    height: 100%;
    background: var(--system-gray-6);
    display: flex;
    flex-direction: column;
}

.mockup-alert {
    background: linear-gradient(135deg, var(--primary-red) 0%, var(--primary-red-light) 100%);
    color: white;
    padding: var(--space-lg);
    text-align: center;
    border-bottom-left-radius: var(--border-radius-xl);
    border-bottom-right-radius: var(--border-radius-xl);
}

.mockup-alert i {
    font-size: 32px;
    margin-bottom: var(--space-sm);
}

.mockup-alert h3 {
    font-size: var(--font-size-md);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.mockup-alert p {
    font-size: var(--font-size-sm);
    opacity: 0.9;
    margin: var(--space-xs) 0 0;
}

.mockup-content {
    padding: var(--space-lg);
    flex: 1;
}

.mockup-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.mockup-info {
    background: white;
    padding: var(--space-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--card-shadow);
}

.mockup-info h4 {
    font-size: var(--font-size-lg);
    margin: 0 0 var(--space-sm);
    color: var(--primary-red);
}

.mockup-info p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin: 0;
}

/* --- Status Section --- */
.status-section {
    padding: var(--space-xxl) var(--space-lg);
    background: white;
}

.status-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.status-card {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--card-shadow);
    border: 1px solid var(--system-gray-5);
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    transition: all var(--transition-base);
}

.status-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow-hover);
    border-color: var(--system-gray-4);
}

.status-success {
    border-left: 4px solid var(--success-green);
}

.status-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--border-radius-lg);
    background: var(--system-gray-6);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.status-success .status-icon {
    background-color: var(--success-light);
    color: var(--success-green);
}

.status-icon i {
    font-size: 24px;
}

.status-content h3 {
    font-size: var(--font-size-lg);
    margin: 0 0 var(--space-xs);
}

.status-content p {
    color: var(--text-primary);
    margin: 0 0 var(--space-xs);
    font-weight: 500;
}

.status-detail {
    color: var(--text-secondary);
    font-size: var(--font-size-xs);
}

.status-indicator {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-weight: 600;
}

.status-indicator.active {
    color: var(--success-green);
}

.status-indicator.active::before {
    content: '';
    width: 8px;
    height: 8px;
    background-color: var(--success-green);
    border-radius: 50%;
    display: inline-block;
}

/* --- Features Section --- */
.features-section {
    padding: var(--space-xxl) var(--space-lg);
    background: linear-gradient(135deg, rgba(139, 0, 0, 0.02) 0%, rgba(255, 0, 0, 0.02) 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--card-shadow);
    text-align: center;
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--card-shadow-hover);
}

.feature-icon {
    width: 80px;
    height: 80px;
    border-radius: var(--border-radius-lg);
    margin: 0 auto var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
}

.feature-medical {
    background: linear-gradient(135deg, #FFEBEE 0%, #FFCDD2 100%);
    color: var(--primary-red);
}

.feature-tsa {
    background: linear-gradient(135deg, #E3F2FD 0%, #BBDEFB 100%);
    color: #1976D2;
}

.feature-privacy {
    background: linear-gradient(135deg, #F3E5F5 0%, #E1BEE7 100%);
    color: #7B1FA2;
}

.feature-qr {
    background: linear-gradient(135deg, #E8F5E9 0%, #C8E6C9 100%);
    color: #388E3C;
}

.feature-lost {
    background: linear-gradient(135deg, #FFF3E0 0%, #FFE0B2 100%);
    color: #F57C00;
}

.feature-mobile {
    background: linear-gradient(135deg, #F5F5F5 0%, #EEEEEE 100%);
    color: #616161;
}

.feature-card h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* --- How It Works --- */
.how-it-works {
    padding: var(--space-xxl) var(--space-lg);
    background: white;
}

.steps-container {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.steps-container::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 30px;
    width: 2px;
    background: var(--system-gray-5);
    z-index: 1;
}

.step {
    display: flex;
    align-items: flex-start;
    gap: var(--space-lg);
    margin-bottom: var(--space-xxl);
    position: relative;
    z-index: 2;
}

.step:last-child {
    margin-bottom: 0;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-red) 0%, var(--primary-red-light) 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    font-weight: 700;
    flex-shrink: 0;
    position: relative;
    z-index: 2;
}

.step-content {
    flex: 1;
    padding-top: var(--space-sm);
}

.step-content h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-sm);
    color: var(--primary-red);
}

.step-content p {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    line-height: 1.6;
}

/* --- Compliance Section --- */
.compliance-section {
    padding: var(--space-xxl) var(--space-lg);
    background: linear-gradient(135deg, rgba(139, 0, 0, 0.05) 0%, rgba(255, 0, 0, 0.05) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xxl);
    max-width: 1200px;
    margin: 0 auto;
    border-radius: var(--border-radius-xl);
}

.compliance-badge {
    text-align: center;
    flex-shrink: 0;
}

.compliance-badge i {
    font-size: 64px;
    color: var(--primary-red);
    margin-bottom: var(--space-md);
}

.compliance-badge h3 {
    font-size: var(--font-size-lg);
    color: var(--primary-red);
    max-width: 200px;
}

.compliance-content {
    flex: 1;
}

.compliance-content p {
    font-size: var(--font-size-lg);
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
}

.compliance-list {
    list-style: none;
}

.compliance-list li {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
    font-size: var(--font-size-md);
}

.compliance-list i {
    color: var(--success-green);
    font-size: var(--font-size-md);
}

/* --- Contact Section --- */
.contact-section {
    padding: var(--space-xxl) var(--space-lg);
    background: white;
}

.contact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xxl);
    max-width: 1200px;
    margin: 0 auto;
}

.contact-info h3 {
    font-size: var(--font-size-xl);
    color: var(--primary-red);
    margin-bottom: var(--space-lg);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    font-size: var(--font-size-md);
}

.contact-item i {
    color: var(--primary-red);
    width: 24px;
    text-align: center;
}

.contact-form {
    background: white;
    border-radius: var(--border-radius-xl);
    padding: var(--space-xl);
    box-shadow: var(--card-shadow);
}

.contact-form h3 {
    font-size: var(--font-size-xl);
    color: var(--primary-red);
    margin-bottom: var(--space-lg);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-input, .form-textarea {
    width: 100%;
    padding: var(--space-md);
    border: 1px solid var(--system-gray-4);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-md);
    font-family: inherit;
    transition: all var(--transition-fast);
}

.form-input:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--primary-red);
    box-shadow: 0 0 0 3px rgba(139, 0, 0, 0.1);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

/* --- Footer --- */
.main-footer {
    background: #1C1C1E;
    color: white;
    padding: var(--space-xxl) var(--space-lg) var(--space-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-xxl);
    max-width: 1200px;
    margin: 0 auto var(--space-xxl);
}

.footer-section h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-lg);
    color: white;
}

.footer-section p {
    color: var(--system-gray-3);
    margin-bottom: var(--space-lg);
    line-height: 1.6;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.footer-links a {
    color: var(--system-gray-3);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: white;
}

.status-indicators {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--system-gray-3);
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: var(--success-green);
    border-radius: 50%;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--space-lg);
    text-align: center;
    color: var(--system-gray-3);
    font-size: var(--font-size-sm);
}

.footer-bottom p {
    margin-bottom: var(--space-xs);
}

/* --- Badges --- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-danger {
    background-color: var(--alert-light);
    color: var(--alert-red);
    border: 1px solid rgba(255, 59, 48, 0.2);
}

.badge-warning {
    background-color: var(--warning-light);
    color: #E65100;
    border: 1px solid rgba(255, 152, 0, 0.2);
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-buttons .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .main-nav {
        display: none;
    }
    
    .compliance-section {
        flex-direction: column;
        text-align: center;
        gap: var(--space-xl);
    }
    
    .steps-container::before {
        left: 15px;
    }
    
    .step-number {
        width: 50px;
        height: 50px;
        font-size: var(--font-size-lg);
    }
    
    .device-mockup {
        width: 280px;
        height: 440px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: var(--font-size-xxl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-md);
    }
    
    .section-title {
        font-size: var(--font-size-xl);
    }
    
    .status-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
}