/* ===================================
   EVENTHUB - MODERN PROFESSIONAL THEME
   Vibrant, Clean & Readable Design
   =================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

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

:root {
    /* Primary Brand - Crystalline Gold */
    --primary-color: #FFC700;
    --primary-dark: #D4A600;
    --primary-light: #FFD740;
    --primary-bg: rgba(255, 199, 0, 0.06);
    
    /* Secondary - Warm Amber */
    --secondary-color: #F59E0B;
    --secondary-dark: #D97706;
    --secondary-light: #FBBF24;
    
    /* Accent - Deep Gold */
    --accent-color: #B8860B;
    --accent-light: #DAA520;
    
    /* Background Colors - Dark Crystalline */
    --bg-primary: #000000;
    --bg-secondary: #0A0A0A;
    --bg-tertiary: #141414;
    --bg-dark: #0A0A0A;
    --bg-darker: #000000;
    --bg-card: rgba(26, 26, 26, 0.8);
    --bg-glass: rgba(38, 38, 38, 0.6);
    
    /* Text Colors - Light on Dark */
    --text-primary: #EDEDED;
    --text-secondary: #A1A1A1;
    --text-muted: #737373;
    --text-light: #525252;
    --text-on-dark: #EDEDED;
    --text-on-primary: #000000;
    
    /* Borders & Surfaces */
    --border-light: rgba(66, 66, 66, 0.5);
    --border-medium: #424242;
    --border-primary: rgba(255, 199, 0, 0.5);
    
    /* Gradients - Golden */
    --gradient-primary: linear-gradient(135deg, #FFC700 0%, #F59E0B 100%);
    --gradient-secondary: linear-gradient(135deg, #D4A600 0%, #FFC700 100%);
    --gradient-hero: linear-gradient(135deg, #000000 0%, #0A0A0A 50%, #000000 100%);
    --gradient-subtle: linear-gradient(180deg, #0A0A0A 0%, #000000 100%);
    --gradient-holographic: linear-gradient(135deg, #FFC700 0%, #F59E0B 50%, #D97706 100%);
    --gradient-neon: linear-gradient(90deg, #FFC700, #F59E0B, #D97706, #B8860B);
    
    /* Golden Shadows */
    --shadow-glow: 0 0 20px rgba(255, 199, 0, 0.3);
    --shadow-neon-gold: 0 0 30px rgba(255, 199, 0, 0.5);
    --shadow-neon-amber: 0 0 30px rgba(245, 158, 11, 0.5);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.5);
    
    /* Legacy Color Support */
    --color-white: #ffffff;
    --color-gray-50: #EDEDED;
    --color-gray-100: #D4D4D4;
    --color-gray-200: #A1A1A1;
    --color-gray-300: #737373;
    --color-gray-400: #525252;
    --color-gray-500: #424242;
    --color-gray-600: #262626;
    --color-gray-700: #1A1A1A;
    --color-gray-800: #0A0A0A;
    --color-gray-900: #000000;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 5rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.25rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows - Soft & Clean */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 16px 40px rgba(0, 0, 0, 0.12);
    --shadow-card: 0 4px 20px rgba(124, 58, 237, 0.08);
    --shadow-card-hover: 0 12px 32px rgba(124, 58, 237, 0.15);
    --shadow-card-hover: 0 12px 32px rgba(124, 58, 237, 0.15);
    
    /* Transitions - Fast & Smooth */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===================================
   CONTAINER
   =================================== */

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

@media (min-width: 640px) {
    .container {
        padding: 0 var(--spacing-xl);
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 var(--spacing-2xl);
    }
}

/* ===================================
   NAVIGATION BAR - Clean & Professional
   =================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-medium);
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(0, 0, 0, 0.95);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo h1 {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-bars {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.logo-bars span {
    display: block;
    height: 2px;
    background: var(--primary-color);
    border-radius: 1px;
}

.logo-bars span:nth-child(1) { width: 18px; }
.logo-bars span:nth-child(2) { width: 14px; }
.logo-bars span:nth-child(3) { width: 10px; }

.nav-logo h1:hover {
    opacity: 0.85;
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-muted);
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 60%;
    height: 2px;
    background: var(--primary-color);
    border-radius: var(--radius-full);
    transition: transform var(--transition-base);
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    transform: translateX(-50%) scaleX(1);
}

.nav-link.active {
    color: var(--text-primary);
}

/* ===================================
   FOOTER - Clean Professional Design
   =================================== */

.footer {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    margin-top: var(--spacing-3xl);
    border-top: 1px solid var(--border-medium);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.footer-section h4 {
    font-size: 1.0625rem;
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.footer-section p {
    color: var(--color-gray-400);
    line-height: 1.7;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-section ul li a {
    color: var(--color-gray-400);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-section ul li a:hover {
    color: var(--primary-light);
}

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: var(--color-gray-500);
    font-size: 0.875rem;
}

/* ===================================
   NOTIFICATION - Clean Style
   =================================== */

.notification {
    position: fixed;
    top: 100px;
    right: var(--spacing-xl);
    background: var(--bg-card);
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-medium);
    box-shadow: var(--shadow-card);
    backdrop-filter: blur(12px);
    z-index: 9999;
    transform: translateX(400px);
    opacity: 0;
    transition: all var(--transition-slow);
    max-width: 400px;
}

.notification.show {
    transform: translateX(0);
    opacity: 1;
}

.notification-content {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.notification-icon {
    flex-shrink: 0;
    color: var(--primary-color);
}

.notification-content h4 {
    font-size: 1.0625rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.notification-content p {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ===================================
   RESPONSIVE UTILITIES
   =================================== */

@media (max-width: 768px) {
    .nav-container {
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .nav-logo h1 {
        font-size: 1.5rem;
    }
    
    .nav-links {
        gap: var(--spacing-sm);
    }
    
    .nav-link {
        font-size: 0.875rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .notification {
        right: var(--spacing-md);
        left: var(--spacing-md);
        max-width: none;
    }
}

/* ===================================
   SIMPLE ANIMATIONS - Performance Optimized
   =================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.fade-in-up {
    animation: fadeInUp 0.5s ease-out forwards;
}

.fade-in {
    animation: fadeIn 0.4s ease-out forwards;
}

/* ===================================
   SCROLL ANIMATIONS - Lightweight
   =================================== */

.scroll-animate {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================
   SELECTION STYLING
   =================================== */

::selection {
    background: var(--primary-color);
    color: var(--bg-primary);
}

::-moz-selection {
    background: var(--primary-color);
    color: var(--bg-primary);
}