/**
 * ============================================
 * ANIMATIONS
 * Entrance animations and scroll effects
 * ============================================
 */

/* ----------------------------------------
 * BASE ANIMATION CLASSES
 * ---------------------------------------- */

/* Fade up animation */
.animate-fade-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Fade in animation */
.animate-fade-in {
    opacity: 0;
    animation: fadeIn 1s ease forwards;
}

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

/* Scale up animation */
.animate-scale-up {
    opacity: 0;
    transform: scale(0.95);
    animation: scaleUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes scaleUp {
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Slide in from left */
.animate-slide-left {
    opacity: 0;
    transform: translateX(-40px);
    animation: slideLeft 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideLeft {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Slide in from right */
.animate-slide-right {
    opacity: 0;
    transform: translateX(40px);
    animation: slideRight 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideRight {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ----------------------------------------
 * ANIMATION DELAYS
 * ---------------------------------------- */

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }
.animate-delay-4 { animation-delay: 0.4s; }
.animate-delay-5 { animation-delay: 0.5s; }
.animate-delay-6 { animation-delay: 0.6s; }
.animate-delay-7 { animation-delay: 0.7s; }
.animate-delay-8 { animation-delay: 0.8s; }

/* ----------------------------------------
 * SCROLL-TRIGGERED ANIMATIONS
 * Elements with these classes start hidden
 * and animate when scrolled into view
 * ---------------------------------------- */

.scroll-animate {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Staggered delays for scroll animations */
.scroll-animate[data-delay="1"] { transition-delay: 0.1s; }
.scroll-animate[data-delay="2"] { transition-delay: 0.2s; }
.scroll-animate[data-delay="3"] { transition-delay: 0.3s; }
.scroll-animate[data-delay="4"] { transition-delay: 0.4s; }

/* ----------------------------------------
 * HOVER ANIMATIONS
 * ---------------------------------------- */

/* Subtle lift on hover */
.hover-lift {
    transition: transform var(--transition-base), 
                box-shadow var(--transition-base);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

/* Scale on hover */
.hover-scale {
    transition: transform var(--transition-base);
}

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

/* Glow on hover */
.hover-glow {
    transition: box-shadow var(--transition-base);
}

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

/* ----------------------------------------
 * SPECIAL EFFECTS
 * ---------------------------------------- */

/* Subtle float animation for decorative elements */
.float {
    animation: float 6s ease-in-out infinite;
}

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

/* Pulse animation */
.pulse {
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Shimmer effect for loading states */
.shimmer {
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.1) 50%,
        rgba(255, 255, 255, 0) 100%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

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

/* ----------------------------------------
 * TRANSITION UTILITIES
 * ---------------------------------------- */

.transition-none { transition: none; }
.transition-fast { transition: all var(--transition-fast); }
.transition-base { transition: all var(--transition-base); }
.transition-slow { transition: all var(--transition-slow); }

/* ----------------------------------------
 * REDUCED MOTION
 * Respect user preferences
 * ---------------------------------------- */

@media (prefers-reduced-motion: reduce) {
    .animate-fade-up,
    .animate-fade-in,
    .animate-scale-up,
    .animate-slide-left,
    .animate-slide-right {
        animation: none;
        opacity: 1;
        transform: none;
    }
    
    .scroll-animate {
        opacity: 1;
        transform: none;
        transition: none;
    }
    
    .float,
    .pulse,
    .shimmer {
        animation: none;
    }
}