/* Modern Professional UI Enhancements for CESA Website */

/* Advanced CSS Custom Properties */
:root {
    /* Enhanced Color Palette */
    --primary-gradient: linear-gradient(135deg, #00ff9d 0%, #00d68c 50%, #00b377 100%);
    --secondary-gradient: linear-gradient(135deg, #00a8ff 0%, #0078d4 50%, #005a9e 100%);
    --accent-gradient: linear-gradient(135deg, #ff6b6b 0%, #ee5a52 50%, #e74c3c 100%);
    
    /* Glass Morphism */
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.12);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    
    /* Advanced Shadows */
    --shadow-elevation-1: 0 2px 8px rgba(0, 0, 0, 0.12);
    --shadow-elevation-2: 0 4px 16px rgba(0, 0, 0, 0.16);
    --shadow-elevation-3: 0 8px 24px rgba(0, 0, 0, 0.20);
    --shadow-elevation-4: 0 16px 32px rgba(0, 0, 0, 0.24);
    --shadow-glow-primary: 0 0 40px rgba(0, 255, 157, 0.4);
    --shadow-glow-secondary: 0 0 40px rgba(0, 168, 255, 0.4);
    
    /* Typography Scale */
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    --font-weight-black: 900;
    
    /* Spacing Scale */
    --space-3xs: 0.125rem;
    --space-2xs: 0.25rem;
    --space-xs: 0.5rem;
    --space-sm: 0.75rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    
    /* Border Radius Scale */
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 20px;
    --radius-3xl: 24px;
    --radius-full: 9999px;
    
    /* Animation Curves */
    --ease-in-out-cubic: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out-cubic: cubic-bezier(0, 0, 0.2, 1);
    --ease-in-cubic: cubic-bezier(0.4, 0, 1, 1);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Enhanced Base Styles */
body {
    font-optical-sizing: auto;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background: 
        radial-gradient(circle at 20% 80%, rgba(0, 255, 157, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0, 168, 255, 0.1) 0%, transparent 50%),
        linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
    background-attachment: fixed;
}

/* Modern Navigation Enhancements */
.navbar {
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 1px 20px rgba(0, 0, 0, 0.3);
    transition: all 0.3s var(--ease-out-cubic);
}

.navbar-scrolled {
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(30px) saturate(200%);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
    border-bottom-color: var(--primary-color);
}

/* Enhanced Brand */
.brand-container {
    position: relative;
}

.brand-container::before {
    content: '';
    position: absolute;
    top: -5px;
    left: -5px;
    right: -5px;
    bottom: -5px;
    background: var(--primary-gradient);
    border-radius: var(--radius-lg);
    opacity: 0;
    transition: opacity 0.3s var(--ease-out-cubic);
    z-index: -1;
}

.brand-container:hover::before {
    opacity: 0.1;
}

.brand-logo {
    filter: drop-shadow(0 0 10px rgba(0, 255, 157, 0.6));
    transition: all 0.3s var(--ease-bounce);
}

.brand-container:hover .brand-logo {
    filter: drop-shadow(0 0 20px rgba(0, 255, 157, 0.8));
    transform: scale(1.05);
}

.brand-title {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 10px rgba(0, 255, 157, 0.3));
}

/* Advanced Navigation Links */
.nav-link {
    position: relative;
    overflow: hidden;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: all 0.3s var(--ease-out-cubic);
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

.nav-link:hover {
    background: rgba(0, 255, 157, 0.08);
    backdrop-filter: blur(10px);
    box-shadow: inset 0 0 20px rgba(0, 255, 157, 0.1);
}

/* Enhanced Login Button */
.login-link {
    background: var(--primary-gradient);
    position: relative;
    overflow: hidden;
}

.login-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.6s var(--ease-out-cubic);
}

.login-link:hover::before {
    left: 100%;
}

.login-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-primary);
}

/* Modern Hero Section */
.hero-section {
    background: 
        radial-gradient(circle at 30% 20%, rgba(0, 255, 157, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 70% 80%, rgba(0, 168, 255, 0.15) 0%, transparent 50%),
        linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 50%, #0a0a0a 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%2300ff9d' fill-opacity='0.03'%3E%3Ccircle cx='30' cy='30' r='1'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    animation: float 20s ease-in-out infinite;
}

.hero-section h1 {
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: var(--font-weight-black);
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-xl);
}

.hero-section .text-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 20px rgba(0, 255, 157, 0.3));
}

.hero-image-container {
    position: relative;
}

.hero-image-container::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    right: -20px;
    bottom: -20px;
    background: var(--primary-gradient);
    border-radius: var(--radius-3xl);
    opacity: 0.1;
    filter: blur(20px);
    animation: pulse 3s ease-in-out infinite;
}

.hero-image-container img {
    position: relative;
    z-index: 2;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-elevation-4);
}

/* Enhanced Buttons */
.btn {
    position: relative;
    overflow: hidden;
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.025em;
    transition: all 0.3s var(--ease-out-cubic);
    backdrop-filter: blur(10px);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s var(--ease-out-cubic);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--primary-gradient);
    border: none;
    box-shadow: var(--shadow-elevation-2);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow-primary);
}

.btn-outline-primary {
    background: rgba(0, 255, 157, 0.1);
    border: 2px solid var(--primary-color);
    backdrop-filter: blur(10px);
}

.btn-outline-primary:hover {
    background: var(--primary-gradient);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow-primary);
}

/* Modern Cards */
.card, .team-card, .event-card, .stat-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    transition: all 0.4s var(--ease-out-cubic);
    position: relative;
    overflow: hidden;
}

.card::before, .team-card::before, .event-card::before, .stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s var(--ease-out-cubic);
}

.card:hover::before, .team-card:hover::before, .event-card:hover::before, .stat-card:hover::before {
    transform: scaleX(1);
}

.card:hover, .team-card:hover, .event-card:hover, .stat-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-elevation-4);
    border-color: rgba(0, 255, 157, 0.3);
}

/* Enhanced Team Cards */
.team-image {
    position: relative;
    border: 3px solid transparent;
    background: var(--primary-gradient);
    background-clip: padding-box;
}

.team-image::before {
    content: '';
    position: absolute;
    top: -3px;
    left: -3px;
    right: -3px;
    bottom: -3px;
    background: var(--primary-gradient);
    border-radius: 50%;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s var(--ease-out-cubic);
}

.team-image:hover::before {
    opacity: 1;
    animation: rotate 2s linear infinite;
}

.team-image img {
    border-radius: 50%;
    transition: all 0.3s var(--ease-out-cubic);
}

.team-image:hover img {
    transform: scale(1.1);
}

/* Enhanced Social Links */
.social-links a {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    position: relative;
    overflow: hidden;
}

.social-links a::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--primary-gradient);
    opacity: 0;
    transition: opacity 0.3s var(--ease-out-cubic);
}

.social-links a:hover::before {
    opacity: 1;
}

.social-links a i {
    position: relative;
    z-index: 2;
    transition: all 0.3s var(--ease-out-cubic);
}

.social-links a:hover i {
    color: var(--text-dark);
    transform: scale(1.2);
}

/* Enhanced Statistics */
.stat-card h3 {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 20px rgba(0, 255, 157, 0.4));
    font-weight: var(--font-weight-black);
}

/* Modern Event Cards */
.event-date {
    background: var(--primary-gradient);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-elevation-2);
}

.event-image {
    position: relative;
    overflow: hidden;
}

.event-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(0, 255, 157, 0.1), rgba(0, 168, 255, 0.1));
    opacity: 0;
    transition: opacity 0.3s var(--ease-out-cubic);
}

.event-card:hover .event-image::after {
    opacity: 1;
}

/* Enhanced Partners Section */
.partner-logo {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    position: relative;
    overflow: hidden;
}

.partner-logo::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--primary-gradient);
    opacity: 0;
    transition: opacity 0.3s var(--ease-out-cubic);
}

.partner-logo:hover::after {
    opacity: 0.1;
}

.partner-logo img {
    position: relative;
    z-index: 2;
    filter: grayscale(100%) brightness(0.8);
    transition: all 0.3s var(--ease-out-cubic);
}

.partner-logo:hover img {
    filter: grayscale(0%) brightness(1.1);
    transform: scale(1.05);
}

/* Enhanced Footer */
.footer {
    background: 
        linear-gradient(135deg, rgba(0, 255, 157, 0.05) 0%, transparent 50%),
        linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
    backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand h5 {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Advanced Animations */
@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    33% { transform: translateY(-10px) rotate(1deg); }
    66% { transform: translateY(5px) rotate(-1deg); }
}

@keyframes pulse {
    0%, 100% { opacity: 0.1; transform: scale(1); }
    50% { opacity: 0.2; transform: scale(1.05); }
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Scroll Animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s var(--ease-out-cubic);
}

.animate-on-scroll.in-view {
    opacity: 1;
    transform: translateY(0);
}

/* Loading States */
.btn.loading {
    pointer-events: none;
    position: relative;
    color: transparent;
}

.btn.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Micro-interactions */
.interactive-element {
    transition: all 0.2s var(--ease-out-cubic);
}

.interactive-element:hover {
    transform: scale(1.02);
}

.interactive-element:active {
    transform: scale(0.98);
}

/* Enhanced Form Controls */
.form-control {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    transition: all 0.3s var(--ease-out-cubic);
}

.form-control:focus {
    background: rgba(0, 255, 157, 0.05);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 255, 157, 0.1);
    transform: translateY(-2px);
}

/* Responsive Enhancements */
@media (max-width: 768px) {
    .hero-section h1 {
        font-size: clamp(2rem, 8vw, 3rem);
    }
    
    .card, .team-card, .event-card, .stat-card {
        margin-bottom: var(--space-lg);
    }
    
    .team-image {
        width: 100px;
        height: 100px;
    }
    
    .faculty-card .team-image {
        width: 120px;
        height: 120px;
    }
}

/* Dark Mode Optimizations */
@media (prefers-color-scheme: dark) {
    :root {
        --glass-bg: rgba(255, 255, 255, 0.05);
        --glass-border: rgba(255, 255, 255, 0.08);
    }
}

/* High Performance Mode */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Print Optimizations */
@media print {
    .glass-effect,
    .backdrop-filter {
        backdrop-filter: none !important;
        background: white !important;
    }
}