/* Glassmorphism Design System */
:root {
    /* Glass Colors */
    --glass-bg-light: rgba(255, 255, 255, 0.1);
    --glass-bg-medium: rgba(255, 255, 255, 0.15);
    --glass-bg-dark: rgba(255, 255, 255, 0.05);
    --glass-border-light: rgba(255, 255, 255, 0.2);
    --glass-border-medium: rgba(255, 255, 255, 0.3);
    --glass-border-dark: rgba(255, 255, 255, 0.1);
    
    /* Shadows */
    --glass-shadow-light: 0 4px 16px rgba(0, 0, 0, 0.1);
    --glass-shadow-medium: 0 8px 32px rgba(0, 0, 0, 0.15);
    --glass-shadow-heavy: 0 16px 64px rgba(0, 0, 0, 0.2);
    
    /* Blur Effects */
    --glass-blur-small: blur(8px);
    --glass-blur-medium: blur(12px);
    --glass-blur-large: blur(20px);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-dark: linear-gradient(135deg, #141e30 0%, #243b55 100%);
    --gradient-glass: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.1) 0%, 
        rgba(255, 255, 255, 0.05) 100%);
    
    /* Theme Colors */
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --text-color: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --text-muted: rgba(255, 255, 255, 0.6);
    --bg-color: #0f172a;
    --bg-secondary: #1e293b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    --radius-full: 50px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Glass Card */
.glass-card {
    background: var(--glass-bg-medium);
    backdrop-filter: var(--glass-blur-medium);
    -webkit-backdrop-filter: var(--glass-blur-medium);
    border-radius: var(--radius-lg);
    border: 1px solid var(--glass-border-light);
    box-shadow: var(--glass-shadow-medium);
    padding: var(--space-lg);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.2), 
        transparent);
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--glass-shadow-heavy);
    border-color: var(--glass-border-medium);
}

.glass-card.primary {
    background: linear-gradient(135deg, 
        rgba(102, 126, 234, 0.2), 
        rgba(118, 75, 162, 0.1));
}

/* Glass Navigation */
.glass-nav {
    background: var(--glass-bg-light);
    backdrop-filter: var(--glass-blur-medium);
    -webkit-backdrop-filter: var(--glass-blur-medium);
    border-bottom: 1px solid var(--glass-border-light);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-sm) 0;
}

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

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

.brand-logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--text-color);
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 600;
}

.brand-logo i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

/* Glass Buttons */
.glass-button {
    background: var(--glass-bg-medium);
    backdrop-filter: var(--glass-blur-small);
    -webkit-backdrop-filter: var(--glass-blur-small);
    border: 1px solid var(--glass-border-light);
    color: var(--text-color);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-decoration: none;
    font-family: inherit;
    font-size: 1rem;
}

.glass-button:hover {
    background: var(--glass-bg-dark);
    border-color: var(--glass-border-medium);
    transform: translateY(-2px);
    box-shadow: var(--glass-shadow-light);
}

.glass-button.primary {
    background: linear-gradient(135deg, 
        rgba(102, 126, 234, 0.3), 
        rgba(118, 75, 162, 0.2));
    border-color: rgba(102, 126, 234, 0.4);
}

.glass-button.primary:hover {
    background: linear-gradient(135deg, 
        rgba(102, 126, 234, 0.4), 
        rgba(118, 75, 162, 0.3));
    border-color: rgba(102, 126, 234, 0.6);
}

.glass-button.secondary {
    background: linear-gradient(135deg, 
        rgba(240, 147, 251, 0.2), 
        rgba(245, 87, 108, 0.1));
    border-color: rgba(240, 147, 251, 0.3);
}

.glass-button.full-width {
    width: 100%;
}

.glass-button.small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* Glass Inputs */
.glass-input {
    background: var(--glass-bg-dark);
    backdrop-filter: var(--glass-blur-small);
    -webkit-backdrop-filter: var(--glass-blur-small);
    border: 1px solid var(--glass-border-light);
    color: var(--text-color);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    transition: all var(--transition-normal);
    width: 100%;
}

.glass-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.2);
}

.glass-input::placeholder {
    color: var(--text-muted);
}

/* Glass Footer */
.glass-footer {
    background: var(--glass-bg-dark);
    backdrop-filter: var(--glass-blur-medium);
    -webkit-backdrop-filter: var(--glass-blur-medium);
    border-top: 1px solid var(--glass-border-light);
    margin-top: var(--space-xl);
    padding: var(--space-xl) 0 var(--space-lg);
}

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

.footer-section h3,
.footer-section h4 {
    color: var(--text-color);
    margin-bottom: var(--space-sm);
}

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

/* Glass Loader */
.glass-loader {
    width: 60px;
    height: 60px;
    border: 3px solid var(--glass-border-light);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Preloader */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-content {
    text-align: center;
}

.loading-text {
    color: var(--text-color);
    margin-top: var(--space-md);
    font-size: 1.1rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .glass-card {
        padding: var(--space-md);
        border-radius: var(--radius-md);
    }
    
    .glass-button {
        padding: 0.625rem 1.25rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --glass-bg-light: rgba(255, 255, 255, 0.05);
        --glass-bg-medium: rgba(255, 255, 255, 0.1);
        --glass-border-light: rgba(255, 255, 255, 0.15);
    }
}

/* Print Styles */
@media print {
    .glass-card,
    .glass-nav,
    .glass-footer {
        background: white;
        border: 1px solid #ddd;
        box-shadow: none;
        backdrop-filter: none;
    }
}