/**
 * Modern Animations & Visual Effects
 * VLCS@SCU Website Enhancement
 */

/* ========================================
   Keyframe Animations
   ======================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.05);
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

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

@keyframes slideInFromBottom {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes rotateIn {
    from {
        opacity: 0;
        transform: rotate(-180deg) scale(0.5);
    }
    to {
        opacity: 1;
        transform: rotate(0) scale(1);
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(102, 126, 234, 0.5),
                    0 0 10px rgba(102, 126, 234, 0.3),
                    0 0 15px rgba(102, 126, 234, 0.2);
    }
    50% {
        box-shadow: 0 0 10px rgba(102, 126, 234, 0.8),
                    0 0 20px rgba(102, 126, 234, 0.5),
                    0 0 30px rgba(102, 126, 234, 0.3);
    }
}

/* ========================================
   Animation Classes
   ======================================== */

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.animate-fade-in-down {
    animation: fadeInDown 0.6s ease-out;
}

.animate-fade-in-left {
    animation: fadeInLeft 0.6s ease-out;
}

.animate-fade-in-right {
    animation: fadeInRight 0.6s ease-out;
}

.animate-scale-in {
    animation: scaleIn 0.5s ease-out;
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

.animate-rotate-in {
    animation: rotateIn 0.6s ease-out;
}

/* Delay classes */
.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-400 { animation-delay: 0.4s; }
.delay-500 { animation-delay: 0.5s; }

/* ========================================
   Hover Effects
   ======================================== */

.hover-lift {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-lift:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
}

.hover-glow {
    transition: all 0.3s ease;
}

.hover-glow:hover {
    animation: glow 1.5s ease-in-out infinite;
}

.hover-scale {
    transition: transform 0.3s ease;
}

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

.hover-rotate {
    transition: transform 0.3s ease;
}

.hover-rotate:hover {
    transform: rotate(5deg);
}

.hover-brightness {
    transition: filter 0.3s ease;
}

.hover-brightness:hover {
    filter: brightness(1.1);
}

/* ========================================
   Gradient Backgrounds
   ======================================== */

.gradient-bg-1 {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-size: 200% 200%;
    animation: gradientShift 10s ease infinite;
}

.gradient-bg-2 {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    background-size: 200% 200%;
    animation: gradientShift 10s ease infinite;
}

.gradient-bg-3 {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    background-size: 200% 200%;
    animation: gradientShift 10s ease infinite;
}

.gradient-bg-4 {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    background-size: 200% 200%;
    animation: gradientShift 10s ease infinite;
}

/* ========================================
   Loading States
   ======================================== */

.skeleton {
    background: linear-gradient(
        90deg,
        #f0f0f0 25%,
        #e0e0e0 50%,
        #f0f0f0 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 0.5rem;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(102, 126, 234, 0.2);
    border-top-color: #667eea;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ========================================
   Particle Background Effect
   ======================================== */

.particles-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    animation: particleFloat 20s infinite;
}

@keyframes particleFloat {
    0% {
        transform: translateY(100vh) translateX(0);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100vh) translateX(100px);
        opacity: 0;
    }
}

/* ========================================
   Text Effects
   ======================================== */

.text-shimmer {
    background: linear-gradient(
        90deg,
        #667eea 0%,
        #764ba2 50%,
        #667eea 100%
    );
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 3s linear infinite;
}

.text-glow {
    text-shadow: 0 0 10px rgba(102, 126, 234, 0.5),
                 0 0 20px rgba(102, 126, 234, 0.3),
                 0 0 30px rgba(102, 126, 234, 0.2);
}

.typing-cursor::after {
    content: '|';
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* ========================================
   Border Animations
   ======================================== */

.border-gradient {
    position: relative;
    border: 2px solid transparent;
    background-clip: padding-box;
}

.border-gradient::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: inherit;
    z-index: -1;
}

.border-animate {
    position: relative;
    overflow: hidden;
}

.border-animate::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, #667eea, transparent);
    animation: borderSlide 2s linear infinite;
}

@keyframes borderSlide {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

/* ========================================
   Scroll Reveal
   ======================================== */

.scroll-reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   Glassmorphism
   ======================================== */

.glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.glass-dark {
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

/* ========================================
   Responsive Animations
   ======================================== */

@media (max-width: 768px) {
    /* Reduce animation complexity on mobile */
    .animate-float,
    .animate-pulse {
        animation: none;
    }
    
    .hover-lift:hover {
        transform: translateY(-4px);
    }
}

@media (prefers-reduced-motion: reduce) {
    /* Respect user's motion preferences */
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}