/* CSS Variables - Design System */
:root {
    /* Enhanced Color Palette */
    --color-primary: #0070d3;
    --color-primary-light: #3291ff;
    --color-primary-dark: #0052a3;
    --color-secondary: #40e0e0;
    --color-secondary-light: #6df1f1;
    --color-secondary-dark: #2bb5b5;
    --color-accent: #ff6b6b;
    --color-success: #51cf66;
    --color-warning: #ffd43b;
    --color-dark: #1a1a1a;
    --color-dark-light: #2c3e50;
    --color-light: #f8f9fa;
    --color-white: #ffffff;
    --color-black: #000000;
    --color-gray: #6c757d;
    --color-gray-light: #dee2e6;
    
    /* Enhanced Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    --gradient-hero: linear-gradient(135deg, rgba(0, 112, 211, 0.95), rgba(64, 224, 224, 0.95));
    --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
    --gradient-glass: linear-gradient(145deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.1));
    --gradient-neon: linear-gradient(45deg, #ff006e, #8338ec, #3a86ff);
    --gradient-sunset: linear-gradient(135deg, #ff9a56, #ff6b95, #c44569);
    
    /* Enhanced Shadows */
    --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 20px rgba(0, 0, 0, 0.15);
    --shadow-heavy: 0 8px 40px rgba(0, 0, 0, 0.2);
    --shadow-neon: 0 0 20px rgba(0, 112, 211, 0.5);
    --shadow-neon-hover: 0 0 30px rgba(0, 112, 211, 0.8);
    --shadow-glass: 0 8px 32px rgba(31, 38, 135, 0.37);
    --shadow-floating: 0 20px 40px rgba(0, 0, 0, 0.1);
    
    /* Border Radius */
    --border-radius: 12px;
    --border-radius-lg: 20px;
    --border-radius-xl: 30px;
    --border-radius-pill: 50px;
    
    /* Enhanced Transitions & Animations */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-elastic: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --transition-bounce: all 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    
    /* Enhanced Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 700;
    --font-weight-extra-bold: 800;
    
    /* Z-index */
    --z-header: 1000;
    --z-modal: 1050;
    --z-tooltip: 1070;
    --z-loader: 9999;
    
    /* Glass Effect Variables */
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-backdrop: blur(20px);
}

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

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--color-dark);
    background: var(--color-white);
    overflow-x: hidden;
}

html {
    scroll-behavior: smooth;
}

/* Utility Classes */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

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

.d-flex {
    display: flex;
}

.align-center {
    align-items: center;
}

.justify-center {
    justify-content: center;
}

.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

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

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

.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(50px);
    transition: var(--transition-slow);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.slide-in-left {
    opacity: 0;
    transform: translateX(-100px);
    transition: var(--transition-slow);
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(100px);
    transition: var(--transition-slow);
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.scale-in {
    opacity: 0;
    transform: scale(0.8);
    transition: var(--transition-slow);
}

.scale-in.visible {
    opacity: 1;
    transform: scale(1);
}