/* ============================================
   MODERN ANIMATIONS & DESIGN SYSTEM
   ============================================ */

/* CSS Variables for Design System */
:root {
    /* Gradient Colors */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-dark: linear-gradient(135deg, #1f1c2c 0%, #928dab 100%);
    --gradient-warm: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    --gradient-cool: linear-gradient(135deg, #30cfd0 0%, #330867 100%);
    
    /* Animation Timings */
    --timing-fast: 200ms;
    --timing-normal: 300ms;
    --timing-slow: 500ms;
    --timing-slower: 800ms;
    
    /* Easing Functions */
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --ease-elastic: cubic-bezier(0.175, 0.885, 0.32, 1.275);
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.4);
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-blur: 10px;
}

/* ============================================
   KEYFRAME ANIMATIONS
   ============================================ */

/* Fade In */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Fade In Up */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Fade In Down */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Slide In Left */
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Slide In Right */
@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Float Animation */
@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* Pulse */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

/* Shimmer Effect */
@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

/* Gradient Animation */
@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

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

/* Bounce In */
@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        transform: scale(1);
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

/* Animation Classes */
.animate-fade-in {
    animation: fadeIn var(--timing-slow) var(--ease-smooth);
}

.animate-fade-in-up {
    animation: fadeInUp var(--timing-slow) var(--ease-smooth);
}

.animate-fade-in-down {
    animation: fadeInDown var(--timing-slow) var(--ease-smooth);
}

.animate-scale-in {
    animation: scaleIn var(--timing-normal) var(--ease-bounce);
}

.animate-slide-in-left {
    animation: slideInLeft var(--timing-slow) var(--ease-smooth);
}

.animate-slide-in-right {
    animation: slideInRight var(--timing-slow) var(--ease-smooth);
}

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

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

.animate-bounce-in {
    animation: bounceIn var(--timing-slower) var(--ease-smooth);
}

/* Stagger Delays for Sequential Animations */
.animate-delay-100 {
    animation-delay: 100ms;
}

.animate-delay-200 {
    animation-delay: 200ms;
}

.animate-delay-300 {
    animation-delay: 300ms;
}

.animate-delay-400 {
    animation-delay: 400ms;
}

.animate-delay-500 {
    animation-delay: 500ms;
}

/* ============================================
   GLASSMORPHISM EFFECTS
   ============================================ */

.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
}

.glass-white {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.25);
}

.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);
}

/* ============================================
   GRADIENT BACKGROUNDS
   ============================================ */

.bg-gradient-primary {
    background: var(--gradient-primary);
}

.bg-gradient-secondary {
    background: var(--gradient-secondary);
}

.bg-gradient-accent {
    background: var(--gradient-accent);
}

.bg-gradient-warm {
    background: var(--gradient-warm);
}

.bg-gradient-cool {
    background: var(--gradient-cool);
}

/* Animated Gradient */
.bg-gradient-animated {
    background: linear-gradient(-45deg, #667eea, #764ba2, #f093fb, #4facfe);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
}

/* ============================================
   HOVER EFFECTS
   ============================================ */

/* Lift Effect */
.hover-lift {
    transition: transform var(--timing-normal) var(--ease-smooth),
                box-shadow var(--timing-normal) var(--ease-smooth);
}

.hover-lift:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

/* Scale Effect */
.hover-scale {
    transition: transform var(--timing-normal) var(--ease-smooth);
}

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

/* Glow Effect */
.hover-glow {
    transition: box-shadow var(--timing-normal) var(--ease-smooth);
}

.hover-glow:hover {
    box-shadow: var(--shadow-glow);
}

/* Shine Effect */
.hover-shine {
    position: relative;
    overflow: hidden;
}

.hover-shine::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 var(--timing-slow) var(--ease-smooth);
}

.hover-shine:hover::before {
    left: 100%;
}

/* Tilt Effect */
.hover-tilt {
    transition: transform var(--timing-normal) var(--ease-smooth);
}

.hover-tilt:hover {
    transform: perspective(1000px) rotateX(2deg) rotateY(2deg);
}

/* ============================================
   CARD EFFECTS
   ============================================ */

.card-modern {
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: all var(--timing-normal) var(--ease-smooth);
}

.card-modern:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.card-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);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
}

.card-gradient {
    background: var(--gradient-primary);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    color: white;
}

/* ============================================
   BUTTON EFFECTS
   ============================================ */

.btn-modern {
    position: relative;
    overflow: hidden;
    transition: all var(--timing-normal) var(--ease-smooth);
}

.btn-modern::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width var(--timing-slow) var(--ease-smooth),
                height var(--timing-slow) var(--ease-smooth);
}

.btn-modern:hover::before {
    width: 300px;
    height: 300px;
}

.btn-modern:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ============================================
   SHIMMER EFFECT
   ============================================ */

.shimmer {
    background: linear-gradient(
        90deg,
        #f0f0f0 25%,
        #e0e0e0 50%,
        #f0f0f0 75%
    );
    background-size: 200% 100%;
    animation: shimmer 2s 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: 4px;
}

/* ============================================
   SCROLL ANIMATIONS
   ============================================ */

.scroll-fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--timing-slower) var(--ease-smooth),
                transform var(--timing-slower) var(--ease-smooth);
}

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

/* ============================================
   RESPONSIVE ANIMATIONS
   ============================================ */

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

/* Disable complex animations on mobile for performance */
@media (max-width: 768px) {
    .hover-tilt:hover {
        transform: none;
    }
    
    .bg-gradient-animated {
        animation: none;
        background: var(--gradient-primary);
    }
}