/* CSS Variables matching iOS Design System */
:root {
    /* Colors from iOS DesignSystem */
    --primary-background: #ffffff;
    --secondary-background: #f2f2f7;
    --primary-text: #000000;
    --secondary-text: #8e8e93;
    --accent-color: #007aff;
    --success-color: #34c759;
    --warning-color: #ff9500;
    --destructive-color: #ff3b30;
    
    /* Dark mode colors */
    --dark-primary-background: #000000;
    --dark-secondary-background: #1c1c1e;
    --dark-primary-text: #ffffff;
    --dark-secondary-text: #8e8e93;
    
    /* Spacing (8-point grid) */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 40px;
    --spacing-xxxl: 48px;
    
    /* Corner radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Rounded', system-ui, sans-serif;
    --font-size-large-title: 34px;
    --font-size-title: 28px;
    --font-size-title2: 22px;
    --font-size-headline: 17px;
    --font-size-body: 17px;
    --font-size-subheadline: 15px;
    --font-size-caption: 12px;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --primary-background: var(--dark-primary-background);
        --secondary-background: var(--dark-secondary-background);
        --primary-text: var(--dark-primary-text);
        --secondary-text: var(--dark-secondary-text);
    }
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background-color: var(--primary-background);
    color: var(--primary-text);
    line-height: 1.4;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Container */
.container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    max-width: 100%;
    margin: 0 auto;
}

/* Welcome content */
.welcome-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-lg);
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
    min-height: calc(100vh - 120px); /* Account for footer height */
}

/* Remove spacer since we're using justify-content: center */
.spacer {
    display: none;
}

/* Logo */
.logo-container {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.logo {
    height: 56px;
    width: auto;
    object-fit: contain;
}

/* Content section */
.content-section {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.value-prop {
    margin-bottom: var(--spacing-lg);
}

.value-prop h1 {
    font-size: var(--font-size-title2);
    font-weight: 600;
    font-family: var(--font-family);
    font-feature-settings: "ss01" 1; /* SF Pro Rounded */
    line-height: 1.3;
    color: var(--primary-text);
    margin: 0 0 var(--spacing-sm) 0;
}

.value-prop h2 {
    font-size: var(--font-size-headline);
    font-weight: 500;
    font-family: var(--font-family);
    font-feature-settings: "ss01" 1; /* SF Pro Rounded */
    line-height: 1.3;
    color: var(--secondary-text);
    margin: 0 0 var(--spacing-md) 0;
}

.value-prop .subtitle {
    font-size: var(--font-size-body);
    font-weight: 400;
    color: var(--primary-text);
    line-height: 1.4;
    margin: 0;
}

/* Quote sections */
.quote-section {
    margin: var(--spacing-xl) 0;
    text-align: center;
}

.quote {
    font-size: var(--font-size-body);
    font-style: italic;
    color: var(--secondary-text);
    line-height: 1.5;
    margin: 0;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* Features */
.features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
    align-items: stretch;
    max-width: 600px;
    margin: 0 auto;
}

.feature {
    background-color: var(--secondary-background);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
    flex: 1 1 280px; /* Flexible width with minimum 280px */
    min-width: 280px;
    max-width: 320px;
    font-size: var(--font-size-body);
    color: var(--primary-text);
    font-weight: 400;
    line-height: 1.4;
    transition: background-color 0.3s ease;
}

.feature-title {
    font-family: var(--font-family);
    font-weight: 600;
    font-size: var(--font-size-body);
    color: var(--primary-text);
    margin-bottom: var(--spacing-xs);
}

.feature-description {
    font-size: var(--font-size-subheadline);
    color: var(--secondary-text);
    line-height: 1.4;
}

/* CTA Section */
.cta-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.app-store-button {
    display: inline-block;
    transition: transform 0.2s ease, opacity 0.2s ease;
    cursor: pointer;
}

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

.app-store-button:active {
    transform: scale(0.95);
}

.app-store-badge {
    height: 50px;
    width: auto;
    filter: brightness(1);
}

@media (prefers-color-scheme: dark) {
    .app-store-badge {
        filter: brightness(0.9);
    }
}

.coming-soon {
    font-size: var(--font-size-subheadline);
    color: var(--secondary-text);
    font-weight: 500;
    font-family: var(--font-family);
    font-feature-settings: "ss01" 1; /* SF Pro Rounded */
    margin: 0;
}

/* Footer */
.footer {
    padding: var(--spacing-lg);
    text-align: center;
    border-top: 1px solid var(--secondary-background);
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--secondary-text);
    text-decoration: none;
    font-size: var(--font-size-caption);
    font-weight: 400;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--accent-color);
}

.separator {
    color: var(--secondary-text);
    font-size: var(--font-size-caption);
}

/* Responsive design */
@media (max-width: 480px) {
    .welcome-content {
        padding: var(--spacing-xxl);
        min-height: calc(100vh - 100px);
    }
    
    .value-prop h1 {
        font-size: 20px;
    }
    
    .value-prop h2 {
        font-size: var(--font-size-subheadline);
    }
    
    .value-prop .subtitle {
        font-size: var(--font-size-body);
    }
    
    .quote {
        font-size: var(--font-size-subheadline);
    }
    
    .feature {
        font-size: var(--font-size-subheadline);
    }
    
    .features {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .feature {
        min-width: 100%;
        max-width: 100%;
        flex: none;
    }
    
    .cta-section {
        padding: 0 var(--spacing-md);
    }
    
    .app-store-badge {
        height: 44px;
    }
}

@media (min-width: 768px) {
    .container {
        max-width: 1000px;
    }
    
    .value-prop h1 {
        font-size: var(--font-size-title);
    }
    
    .features {
        max-width: 800px;
    }
    
    .feature {
        flex: 1 1 350px;
        min-width: 350px;
        max-width: 380px;
    }
}

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

/* Focus styles for accessibility */
.app-store-button:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 4px;
    border-radius: var(--radius-sm);
}

.footer-links a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
    border-radius: 4px;
}