/* CSS Custom Properties */
:root {
    /* Blue Accent Color Scheme - Gradient from #3854CF to #082AA8 */
    --accent-blue: #3854CF;
    --accent-blue-dark: #082AA8;
    --accent-blue-light: #5A6FE8;
    --accent-blue-hover: #082AA8;
    --accent-gradient: linear-gradient(135deg, #3854CF 0%, #082AA8 100%);
    
    /* Neutral Colors */
    --text-primary: #1D1D1F;
    --text-secondary: #6E6E73;
    --text-tertiary: #86868B;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F5F5F7;
    --bg-tertiary: #FAFAFA;
    --border-color: #D2D2D7;
    
    /* Dark Mode Support */
    --dark-text-primary: #F5F5F7;
    --dark-text-secondary: #A1A1A6;
    --dark-bg-primary: #000000;
    --dark-bg-secondary: #1D1D1F;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 1rem;
    --font-size-sm: 0.875rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
}

/* Base Styles */
body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.6;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 {
    font-size: var(--font-size-5xl);
    font-weight: 700;
}

h2 {
    font-size: var(--font-size-4xl);
}

h3 {
    font-size: var(--font-size-3xl);
}

h4 {
    font-size: var(--font-size-2xl);
}

p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

a {
    color: var(--accent-blue);
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-blue-hover);
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-wide {
    max-width: 1400px;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.logo {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.logo img {
    width: 32px;
    height: 32px;
    display: block;
    border-radius: var(--radius-md);
    object-fit: cover;
}

.nav {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--accent-blue);
}

/* Hamburger Menu Button */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 24px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.menu-toggle span {
    width: 100%;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(-10px);
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    text-align: center;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white !important;
}

.btn-primary:hover {
    background: var(--accent-gradient);
    color: white !important;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: transparent;
    color: var(--accent-blue);
    border: 2px solid var(--accent-blue);
}

.btn-secondary:hover {
    background: var(--accent-gradient);
    color: white;
}

/* Hero Section */
.hero {
    padding: var(--spacing-xl) 0;
    min-height: 80vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-text h1 {
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--text-primary) 0%, #3854CF 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text p {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.app-store-badge {
    height: 60px;
    transition: transform var(--transition-base);
}

.app-store-badge:hover {
    transform: scale(1.05);
}

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

/* iPhone Screenshot */
.iphone-screenshot {
    width: 100%;
    max-width: 300px;
    height: auto;
    border-radius: 0;
    box-shadow: none;
    display: block;
    background-color: transparent;
}

/* Placeholder version (when used as div) */
.iphone-screenshot-placeholder {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
}

.iphone-screenshot-placeholder::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 30%;
    height: 20px;
    background: var(--text-primary);
    border-radius: var(--radius-full);
}

.iphone-screenshot-placeholder::after {
    content: 'Screenshot';
    font-size: var(--font-size-lg);
    opacity: 0.8;
}

/* Features Section */
.features {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-primary);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title h2 {
    margin-bottom: var(--spacing-sm);
}

.section-title p {
    font-size: var(--font-size-lg);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.feature-card {
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: var(--accent-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
    color: white;
    font-size: var(--font-size-xl);
}

.feature-icon img {
    width: 24px;
    height: 24px;
    filter: brightness(0) invert(1); /* Makes SVG white */
}

.feature-card h3 {
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
}

/* Screenshots Section */
.screenshots {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-secondary);
}

.screenshots-gallery {
    display: flex;
    gap: var(--spacing-md);
    overflow-x: auto;
    padding: var(--spacing-md) var(--spacing-md);
    margin: 0 calc(-1 * var(--spacing-md));
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scroll-padding-left: var(--spacing-md);
    scroll-padding-right: var(--spacing-md);
}

.screenshots-gallery::-webkit-scrollbar {
    height: 8px;
}

.screenshots-gallery::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
}

.screenshots-gallery::-webkit-scrollbar-thumb {
    background: var(--accent-blue);
    border-radius: var(--radius-full);
}

.screenshot-item {
    flex: 0 0 auto;
    width: 280px;
    scroll-snap-align: start;
}

.screenshot-item .iphone-screenshot {
    width: 100%;
    max-width: 280px;
    background-color: transparent;
    box-shadow: none;
    border-radius: 0;
}

/* CTA Section */
.cta {
    padding: var(--spacing-xl) 0;
    background: var(--accent-gradient);
    color: white;
    text-align: center;
}

.cta h2 {
    color: white;
    margin-bottom: var(--spacing-sm);
}

.cta p {
    color: rgba(255, 255, 255, 0.9);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

.cta .btn,
.cta .btn-primary {
    background: white !important;
    color: var(--accent-blue) !important;
}

.cta .btn:hover,
.cta .btn-primary:hover {
    background: #f8f8f8 !important;
    color: var(--accent-blue) !important;
    transform: translateY(-2px);
}

/* Footer */
.footer {
    padding: var(--spacing-lg) 0;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-section h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

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

.footer-link {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--accent-blue);
}

.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-tertiary);
    font-size: var(--font-size-sm);
}

/* Page Content (for Terms, Privacy, etc.) */
.page-content {
    padding: var(--spacing-lg) 0;
    max-width: 800px;
    margin: 0 auto;
}

.page-content h1 {
    margin-bottom: var(--spacing-md);
}

.page-content h2 {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--accent-blue);
}

.page-content h3 {
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
}

.page-content p {
    margin-bottom: var(--spacing-sm);
}

.page-content ul, .page-content ol {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.page-content li {
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
}

/* Support Form */
.support-form {
    max-width: 600px;
    margin: var(--spacing-md) auto;
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

/* FAQ */
.faq-list {
    max-width: 800px;
    margin: var(--spacing-md) auto;
}

.faq-item {
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--accent-blue);
}

.faq-question {
    font-weight: 600;
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.faq-answer {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2rem;
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.5rem;
        --spacing-xl: 3rem;
        --spacing-lg: 2rem;
    }
    
    .header {
        padding: var(--spacing-xs) 0;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-lg);
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        transition: max-height 0.3s ease, opacity 0.3s ease, padding 0.3s ease;
        flex-direction: column;
        gap: 0;
        padding: 0;
        margin-top: var(--spacing-xs);
    }
    
    .nav.active {
        max-height: 500px;
        opacity: 1;
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .nav-links {
        flex-direction: column;
        gap: var(--spacing-xs);
        width: 100%;
        text-align: left;
        margin-bottom: var(--spacing-xs);
    }
    
    .nav-links li {
        width: 100%;
    }
    
    .nav-link {
        display: block;
        padding: var(--spacing-xs) 0;
        width: 100%;
    }
    
    .nav .btn {
        width: 100%;
        padding: 0.75rem 1rem;
        justify-content: center;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .screenshots-gallery {
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
        margin: 0 calc(-1 * var(--spacing-md));
        scroll-padding-left: var(--spacing-md);
        scroll-padding-right: var(--spacing-md);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .header {
        padding: 0.375rem 0;
    }
    
    .logo {
        font-size: var(--font-size-lg);
    }
    
    .logo img {
        width: 20px;
        height: 20px;
    }
    
    .hero {
        padding: var(--spacing-md) 0;
        min-height: auto;
    }
    
    .iphone-screenshot {
        max-width: 200px;
    }
}

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

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }