/* CSS Custom Properties for Consistent Theming */
:root {
    /* Primary Colors */
    --primary: #9334DD;
    --primary-dark: #7022B5;
    --primary-light: #D4B3F3;
    --primary-lighter: #C08EF0;
    
    /* Text Colors */
    --text-dark: #333;
    --text-light: #666;
    --text-white: #fff;
    
    /* Background Colors */
    --background: #f5f5f5;
    --background-light: #e8e8e8;
    --background-white: #fff;
    
    /* Shadow Colors */
    --shadow-light: rgba(147, 52, 221, 0.08);
    --shadow-medium: rgba(147, 52, 221, 0.15);
    --shadow-heavy: rgba(147, 52, 221, 0.25);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --text-dark: #f5f5f5;
        --text-light: #b0b0b0;
        --background: #1a1a1a;
        --background-light: #242424;
        --background-white: #2a2a2a;
    }
}

/* Header Styles */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--shadow-light);
    z-index: 1000;
    transition: var(--transition-normal);
}

@media (prefers-color-scheme: dark) {
    .header {
        background: rgba(26, 26, 26, 0.95);
        border-bottom-color: rgba(255, 255, 255, 0.1);
    }
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: calc(var(--spacing-xs) * 0.25) calc(var(--spacing-md) * 2);
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    height: 100%;
}

.nav-brand .logo {
    height: 56px;
    width: auto;
    transition: var(--transition-fast);
    display: block;
}

.nav-brand .logo:hover {
    transform: scale(1.05);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    height: 100%;
}

.download-btn {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: var(--transition-fast);
}

.download-btn:hover {
    transform: translateY(-2px);
}

.app-store-badge {
    height: 40px;
    width: auto;
    transition: var(--transition-fast);
}

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

.support-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: transparent;
    color: var(--text-dark);
    padding: calc(var(--spacing-xs) * 0.8) var(--spacing-md);
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
    border: 2px solid var(--shadow-light);
}

.support-btn:hover {
    background: var(--background-light);
    border-color: var(--primary-light);
    transform: translateY(-2px);
}

@media (prefers-color-scheme: dark) {
    .support-btn {
        color: var(--text-white);
        border-color: rgba(255, 255, 255, 0.2);
    }
    
    .support-btn:hover {
        background: var(--background-light);
        border-color: var(--primary-light);
    }
}

/* Mobile responsive for header */
@media (max-width: 480px) {
    .nav {
        padding: calc(var(--spacing-xs) * 0.5) calc(var(--spacing-sm) * 1.5);
    }
    
    .nav-brand .logo {
        height: 48px;
    }
    
    .support-btn {
        display: none;
    }
    
    .app-store-badge {
        height: 32px;
    }
}