/* Smooth Animations & Performance Optimizations */

/* Global Animation Settings */
:root {
    --transition-smooth: cubic-bezier(0.4, 0.0, 0.2, 1);
    --transition-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --transition-ease-out: cubic-bezier(0.0, 0.0, 0.2, 1);
    --transition-ease-in: cubic-bezier(0.4, 0.0, 1, 1);
    --duration-fast: 200ms;
    --duration-normal: 300ms;
    --duration-slow: 500ms;
}

/* Hardware Acceleration */
.hardware-accelerate {
    transform: translateZ(0);
    will-change: transform;
    backface-visibility: hidden;
    perspective: 1000px;
}

/* Smooth Card Animations */
.model-card,
.illustration-card,
.project-widget,
.portfolio-item {
    transition: transform var(--duration-normal) var(--transition-smooth),
                box-shadow var(--duration-normal) var(--transition-smooth),
                opacity var(--duration-normal) var(--transition-smooth);
    will-change: transform;
    transform: translateZ(0);
}

.model-card:hover,
.illustration-card:hover {
    transform: translateY(-10px) translateZ(0);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.project-widget:hover {
    transform: translateY(-6px) translateZ(0);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
}

/* Smooth Button Animations */
.tab-btn,
.card-button,
.explore-btn {
    transition: all var(--duration-normal) var(--transition-smooth);
    transform: translateZ(0);
}

.tab-btn:hover {
    transform: translateY(-3px) translateZ(0);
    box-shadow: 0 6px 16px rgba(232, 122, 93, 0.25);
}

.card-button:hover {
    transform: translateY(-3px) translateZ(0);
    box-shadow: 0 6px 12px rgba(232, 122, 93, 0.3);
}

/* Smoother Fade-in Animation */
@keyframes fadeInSmooth {
    from {
        opacity: 0;
        transform: translateY(30px) translateZ(0);
    }
    to {
        opacity: 1;
        transform: translateY(0) translateZ(0);
    }
}

.fade-in {
    opacity: 0;
    animation: fadeInSmooth 0.6s var(--transition-smooth) forwards;
}

.page-loaded .fade-in {
    animation: fadeInSmooth 0.6s var(--transition-smooth) forwards;
}

/* Staggered Animation for Grid Items */
.model-card:nth-child(1),
.illustration-card:nth-child(1) {
    animation-delay: 0ms;
}

.model-card:nth-child(2),
.illustration-card:nth-child(2) {
    animation-delay: 100ms;
}

.model-card:nth-child(3),
.illustration-card:nth-child(3) {
    animation-delay: 200ms;
}

.model-card:nth-child(4),
.illustration-card:nth-child(4) {
    animation-delay: 300ms;
}

.model-card:nth-child(5),
.illustration-card:nth-child(5) {
    animation-delay: 400ms;
}

.model-card:nth-child(6),
.illustration-card:nth-child(6) {
    animation-delay: 500ms;
}

/* Smooth Overlay Transitions */
.project-overlay {
    transition: transform var(--duration-normal) var(--transition-smooth),
                opacity var(--duration-normal) var(--transition-smooth),
                box-shadow var(--duration-normal) var(--transition-smooth);
}

.card-image::after {
    transition: opacity var(--duration-normal) var(--transition-smooth);
}

/* Smooth Navigation */
.main-nav a {
    position: relative;
    transition: color var(--duration-normal) var(--transition-smooth);
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: #e87a5d;
    transition: width var(--duration-normal) var(--transition-smooth);
}

.main-nav a:hover::after {
    width: 100%;
}

/* Smooth Slider Arrows */
.slick-arrow {
    transition: all var(--duration-normal) var(--transition-smooth);
    transform: translateY(-50%) translateZ(0);
}

.slick-arrow:hover {
    transform: translateY(-50%) scale(1.1) translateZ(0);
    background: rgba(0, 0, 0, 0.8);
}

/* Single Item Layout - Center and Enlarge */
.models-grid:has(.model-card:only-child),
.illustrations-grid:has(.illustration-card:only-child) {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
}

.models-grid .model-card:only-child,
.illustrations-grid .illustration-card:only-child {
    max-width: 600px;
    width: 100%;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

/* Two Items Layout - Center Them */
.models-grid:has(.model-card:nth-child(2):last-child),
.illustrations-grid:has(.illustration-card:nth-child(2):last-child) {
    justify-content: center;
}

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

/* Mobile Optimizations */
@media (max-width: 768px) {
    .model-card:hover,
    .illustration-card:hover {
        transform: translateY(-5px) translateZ(0);
    }
    
    .tab-btn:hover,
    .card-button:hover {
        transform: translateY(-2px) translateZ(0);
    }
}