/* Material Design 3 Color System */
:root {
    /* Primary Color - Green matching LeafLog logo */
    --md-primary: #63a002;
    --md-primary-variant: #4d7d02;
    --md-on-primary: #ffffff;
    
    /* Surface Colors - Light Theme */
    --md-surface: #ffffff;
    --md-surface-variant: #f5f5f5;
    --md-on-surface: #1c1b1f;
    --md-on-surface-variant: #49454f;
    
    /* Background */
    --md-background: #fefbff;
    --md-on-background: #1c1b1f;
    
    /* Outline */
    --md-outline: #79747e;
    --md-outline-variant: #cac4d0;
    
    /* Elevation */
    --md-elevation-1: 0px 1px 2px 0px rgba(0, 0, 0, 0.3), 0px 1px 3px 1px rgba(0, 0, 0, 0.15);
    --md-elevation-2: 0px 1px 2px 0px rgba(0, 0, 0, 0.3), 0px 2px 6px 2px rgba(0, 0, 0, 0.15);
    --md-elevation-3: 0px 1px 3px 0px rgba(0, 0, 0, 0.3), 0px 4px 8px 3px rgba(0, 0, 0, 0.15);
    
    /* Spacing */
    --md-spacing-xs: 4px;
    --md-spacing-sm: 8px;
    --md-spacing-md: 16px;
    --md-spacing-lg: 24px;
    --md-spacing-xl: 32px;
    --md-spacing-2xl: 48px;
    --md-spacing-3xl: 64px;
    
    /* Border Radius */
    --md-radius-sm: 4px;
    --md-radius-md: 8px;
    --md-radius-lg: 12px;
    --md-radius-xl: 16px;
    --md-radius-2xl: 28px;
    
    /* Typography Scale */
    --md-font-family: 'Noto Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --md-font-display: 'Noto Sans Display', 'Noto Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Transitions */
    --md-transition: 200ms cubic-bezier(0.2, 0, 0, 1);
}

/* Dark Theme */
@media (prefers-color-scheme: dark) {
    :root {
        --md-surface: #1c1b1f;
        --md-surface-variant: #49454f;
        --md-on-surface: #e6e1e5;
        --md-on-surface-variant: #cac4d0;
        
        --md-background: #1c1b1f;
        --md-on-background: #e6e1e5;
        
        --md-outline: #938f99;
        --md-outline-variant: #49454f;
        
        --md-elevation-1: 0px 1px 2px 0px rgba(0, 0, 0, 0.3), 0px 1px 3px 1px rgba(0, 0, 0, 0.15);
        --md-elevation-2: 0px 2px 2px 0px rgba(0, 0, 0, 0.3), 0px 2px 6px 2px rgba(0, 0, 0, 0.15);
        --md-elevation-3: 0px 1px 3px 0px rgba(0, 0, 0, 0.3), 0px 4px 8px 3px rgba(0, 0, 0, 0.15);
    }
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--md-font-family);
    background-color: var(--md-background);
    color: var(--md-on-background);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color var(--md-transition), color var(--md-transition);
}

/* Main Container */
.main-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    padding: var(--md-spacing-md);
}

/* Hero Section */
.hero-section {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    text-align: center;
    padding: var(--md-spacing-2xl) var(--md-spacing-md);
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 400;
    letter-spacing: -0.01562em;
    line-height: 1.2;
    margin-bottom: var(--md-spacing-md);
    color: var(--md-on-background);
}

.hero-subtitle {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 400;
    letter-spacing: 0;
    line-height: 1.3;
    margin-bottom: var(--md-spacing-lg);
    color: var(--md-primary);
}

.hero-description {
    font-size: clamp(1rem, 2vw, 1.125rem);
    font-weight: 400;
    letter-spacing: 0.00938em;
    line-height: 1.5;
    color: var(--md-on-surface-variant);
    max-width: 500px;
    margin: 0 auto;
}

/* Showcase Section */
.showcase-section {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--md-spacing-2xl);
    justify-items: center;
    align-items: start;
    padding: var(--md-spacing-2xl) var(--md-spacing-md);
    margin-bottom: var(--md-spacing-2xl);
}

.card-link {
    text-decoration: none;
    color: inherit;
    max-width: 500px;
    width: 100%;
    justify-self: center;
}

.card {
    background-color: var(--md-surface);
    border-radius: var(--md-radius-xl);
    box-shadow: var(--md-elevation-2);
    max-width: 500px;
    width: 100%;
    overflow: hidden;
    transition: box-shadow var(--md-transition), transform var(--md-transition);
}

.card:hover {
    box-shadow: var(--md-elevation-3);
    transform: translateY(-2px);
}

.card-content {
    padding: var(--md-spacing-2xl);
    text-align: center;
}

.app-logo-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: var(--md-spacing-lg);
}

.app-logo {
    width: 120px;
    height: 120px;
    max-width: 100%;
    display: block;
    aspect-ratio: 1;
    flex-shrink: 0;
}

.app-icon {
    font-size: 120px;
    line-height: 1;
    color: var(--md-primary);
    display: block;
}

/* Spell It Now theme color (matches spellitnow.com) */
.card-link-spellitnow .app-icon {
    color: #6750A4;
}

.app-name {
    font-family: var(--md-font-display);
    font-size: clamp(1.75rem, 3vw, 2rem);
    font-weight: 400;
    letter-spacing: 0;
    line-height: 1.3;
    margin-bottom: var(--md-spacing-md);
    color: var(--md-on-surface);
}

.app-description {
    font-family: var(--md-font-family);
    font-size: 1rem;
    font-weight: 400;
    letter-spacing: 0.00938em;
    line-height: 1.5;
    color: var(--md-on-surface-variant);
}

/* Footer */
.footer {
    text-align: center;
    padding: var(--md-spacing-xl) var(--md-spacing-md);
    margin-top: auto;
    border-top: 1px solid var(--md-outline-variant);
}

.footer-content {
    max-width: 800px;
    margin: 0 auto;
}

.footer-text {
    font-size: 0.875rem;
    font-weight: 400;
    letter-spacing: 0.01562em;
    color: var(--md-on-surface-variant);
    margin-bottom: var(--md-spacing-md);
}

.footer-license {
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.01562em;
    line-height: 1.5;
    color: var(--md-on-surface-variant);
    margin-bottom: var(--md-spacing-sm);
    opacity: 0.8;
}

.footer-trademark {
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.01562em;
    color: var(--md-on-surface-variant);
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-container {
        padding: var(--md-spacing-sm);
    }
    
    .hero-section {
        min-height: 50vh;
        padding: var(--md-spacing-xl) var(--md-spacing-sm);
    }
    
    .showcase-section {
        grid-template-columns: 1fr;
        padding: var(--md-spacing-lg) var(--md-spacing-sm);
    }
    
    .card-content {
        padding: var(--md-spacing-lg);
    }
    
    .app-logo {
        width: 100px;
        height: 100px;
    }
    
    .app-icon {
        font-size: 100px;
    }
    
    .footer {
        padding: var(--md-spacing-lg) var(--md-spacing-sm);
    }
    
    .footer-license,
    .footer-trademark {
        font-size: 0.6875rem;
        text-align: left;
        padding: 0 var(--md-spacing-sm);
    }
}

@media (max-width: 480px) {
    .hero-section {
        min-height: 40vh;
    }
    
    .app-logo {
        width: 80px;
        height: 80px;
    }
    
    .app-icon {
        font-size: 80px;
    }
}

/* 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 */
*:focus-visible {
    outline: 2px solid var(--md-primary);
    outline-offset: 2px;
    border-radius: var(--md-radius-sm);
}