/* Modern animations and styles */
@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes float-delayed {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-15px) rotate(2deg);
    }
}

@keyframes gradient {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

@keyframes particle-float {
    0% {
        transform: translateY(100vh) translateX(0px) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-10vh) translateX(100px) rotate(360deg);
        opacity: 0;
    }
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
    }
    50% {
        box-shadow: 0 0 40px rgba(99, 102, 241, 0.6);
    }
}

.animate-fade-in-up {
    animation: fade-in-up 1s ease-out forwards;
}

.animation-delay-300 {
    animation-delay: 0.3s;
    opacity: 0;
}

.animation-delay-600 {
    animation-delay: 0.6s;
    opacity: 0;
}

.animation-delay-900 {
    animation-delay: 0.9s;
    opacity: 0;
}

.animation-delay-1200 {
    animation-delay: 1.2s;
    opacity: 0;
}

.animate-float {
    animation: float 8s ease-in-out infinite;
}

.animate-float-delayed {
    animation: float-delayed 6s ease-in-out infinite;
    animation-delay: 2s;
}

/* Glassmorphism effects */
.glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.glass-dark {
    background: rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Modern navigation */
#navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

#navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.nav-item {
    position: relative;
    font-weight: 500;
}

.nav-item::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #6366f1, #8b5cf6);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-item:hover::after,
.nav-item.active::after {
    width: 100%;
}

/* Particle system */
.particle-container {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.particle {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: particle-float 12s linear infinite;
    pointer-events: none;
}

.particle:nth-child(odd) {
    background: rgba(99, 102, 241, 0.1);
    animation-duration: 15s;
}

.particle:nth-child(even) {
    background: rgba(139, 92, 246, 0.1);
    animation-duration: 18s;
}

/* Modern cards */
.modern-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.modern-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Custom button effects */
.btn-modern {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-size: 200% 200%;
    animation: gradient 4s ease infinite;
    transition: all 0.3s ease;
}

.btn-modern:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 35px rgba(102, 126, 234, 0.4);
}

/* Active navigation state */
.nav-link.active {
    color: #6366f1;
    font-weight: 600;
}

/* Statistics animation */
.stat-item {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.stat-item.animate {
    opacity: 1;
    transform: translateY(0);
}

/* Gradient text effect */
.gradient-text {
    background: linear-gradient(135deg, #667eea, #764ba2, #06d6a0);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient 6s ease infinite;
}

/* Modern scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #4f46e5, #7c3aed);
}

/* Loading animation for images */
img {
    transition: all 0.4s ease;
}

img:not([src]) {
    opacity: 0;
    filter: blur(10px);
}

img[src] {
    opacity: 1;
    filter: blur(0px);
}

/* Form modern styling */
input:focus,
textarea:focus,
select:focus {
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    border-color: #6366f1;
}

/* Mobile menu animation */
.mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-menu.show {
    max-height: 400px;
}

/* Hero section enhancements */
.hero-bg {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-size: 400% 400%;
    animation: gradient 8s ease infinite;
}

/* Modern hover effects */
.hover-lift:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

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

/* Responsive design enhancements */
@media (max-width: 768px) {
    .text-6xl {
        font-size: 3rem;
    }
    
    .text-8xl {
        font-size: 4rem;
    }
    
    .text-5xl {
        font-size: 2.5rem;
    }
    
    .py-32 {
        padding-top: 4rem;
        padding-bottom: 4rem;
    }
    
    .modern-card {
        margin-bottom: 2rem;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    .glass {
        background: rgba(0, 0, 0, 0.2);
        border: 1px solid rgba(255, 255, 255, 0.1);
    }
}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus indicators for keyboard navigation */
a:focus,
button:focus {
    outline: 2px solid #6366f1;
    outline-offset: 2px;
    border-radius: 8px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .bg-gradient-to-br {
        background: #6366f1 !important;
    }
}

/* Loading states */
.loading {
    opacity: 0.7;
    pointer-events: none;
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 24px;
    height: 24px;
    margin: -12px 0 0 -12px;
    border: 3px solid #6366f1;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 1s linear infinite;
}

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

/* Modern shadows */
.shadow-modern {
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.shadow-modern-lg {
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
}

.shadow-modern-xl {
    box-shadow: 0 35px 60px rgba(0, 0, 0, 0.2);
}

/* Animated background patterns */
.bg-pattern {
    background-image: radial-gradient(circle at 1px 1px, rgba(99, 102, 241, 0.15) 1px, transparent 0);
    background-size: 20px 20px;
    animation: pattern-move 20s linear infinite;
}

@keyframes pattern-move {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: 20px 20px;
    }
}

/* Glow effects */
.glow {
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
}

.glow-hover:hover {
    box-shadow: 0 0 30px rgba(99, 102, 241, 0.5);
}

/* Text animations */
.text-shimmer {
    background: linear-gradient(90deg, #333 25%, #666 50%, #333 75%);
    background-size: 200% 100%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

/* Hero section particles effect */
.hero-particles {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.particle {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: particle-float 8s linear infinite;
}

@keyframes particle-float {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-10vh) rotate(360deg);
        opacity: 0;
    }
}

/* Responsive design enhancements */
@media (max-width: 768px) {
    .text-5xl {
        font-size: 2.5rem;
    }
    
    .text-7xl {
        font-size: 3.5rem;
    }
    
    .text-4xl {
        font-size: 2rem;
    }
    
    .py-20 {
        padding-top: 3rem;
        padding-bottom: 3rem;
    }
    
    .program-card,
    .faculty-card {
        margin-bottom: 2rem;
    }
}

/* Print styles */
@media print {
    .fixed,
    .mobile-menu-btn,
    .mobile-menu {
        display: none !important;
    }
    
    section {
        page-break-inside: avoid;
    }
}

/* Dark mode support (for future implementation) */
@media (prefers-color-scheme: dark) {
    /* Dark mode styles can be added here */
}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus indicators for keyboard navigation */
a:focus,
button:focus {
    outline: 2px solid #1e40af;
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .bg-gradient-to-br {
        background: #1e40af !important;
    }
}

/* Loading states */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #1e40af;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 1s linear infinite;
}

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