/**
 * Premium Transitions & Animations
 * Relicform Studios - Mobile Enhancement (TASK-019)
 */

/* ========================================
   Custom Easing Functions
   ======================================== */

:root {
    /* Spring-based easings */
    --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* Smooth easings */
    --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
    --ease-out-quart: cubic-bezier(0.165, 0.84, 0.44, 1);
    --ease-in-out-cubic: cubic-bezier(0.645, 0.045, 0.355, 1);

    /* Duration scale */
    --duration-instant: 100ms;
    --duration-fast: 150ms;
    --duration-normal: 250ms;
    --duration-slow: 400ms;
    --duration-slower: 600ms;
}

/* ========================================
   Page Transitions
   ======================================== */

/* Page fade-in on load */
main {
    animation: page-fade-in var(--duration-slow) var(--ease-out-expo) forwards;
}

@keyframes page-fade-in {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   Micro-Interactions
   ======================================== */

/* Button Press Effect */
.btn,
button,
[role="button"] {
    transition:
        transform var(--duration-fast) var(--ease-spring),
        box-shadow var(--duration-fast) var(--ease-out-quart),
        background-color var(--duration-fast) ease,
        border-color var(--duration-fast) ease;
}

.btn:active,
button:active,
[role="button"]:active {
    transform: scale(0.97);
}

/* Card Hover/Touch Effect */
.product-card {
    transition:
        transform var(--duration-normal) var(--ease-out-expo),
        box-shadow var(--duration-normal) var(--ease-out-quart);
}

.product-card:hover,
.product-card:focus-within {
    transform: translateY(-4px);
    box-shadow:
        0 12px 40px rgba(0, 0, 0, 0.35),
        0 0 0 1px rgba(212, 175, 55, 0.08);
}

.product-card:active {
    transform: translateY(-2px) scale(0.99);
}

/* Image hover zoom */
.product-card__image,
.product-card-image {
    overflow: hidden;
}

.product-card__image img,
.product-card-image img {
    transition: transform var(--duration-slow) var(--ease-out-expo);
}

.product-card:hover .product-card__image img,
.product-card:hover .product-card-image img {
    transform: scale(1.05);
}

/* ========================================
   Staggered Animations
   ======================================== */

/* Product grid stagger - start visible, add animation for enhancement only */
.product-grid .product-card,
.featured-grid .product-card {
    opacity: 1; /* Always visible as fallback */
    animation: stagger-fade-in var(--duration-slow) var(--ease-out-expo) both;
}

.product-grid .product-card:nth-child(1),
.featured-grid .product-card:nth-child(1) { animation-delay: 0ms; }

.product-grid .product-card:nth-child(2),
.featured-grid .product-card:nth-child(2) { animation-delay: 50ms; }

.product-grid .product-card:nth-child(3),
.featured-grid .product-card:nth-child(3) { animation-delay: 100ms; }

.product-grid .product-card:nth-child(4),
.featured-grid .product-card:nth-child(4) { animation-delay: 150ms; }

.product-grid .product-card:nth-child(5) { animation-delay: 200ms; }
.product-grid .product-card:nth-child(6) { animation-delay: 250ms; }
.product-grid .product-card:nth-child(7) { animation-delay: 300ms; }
.product-grid .product-card:nth-child(8) { animation-delay: 350ms; }

@keyframes stagger-fade-in {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   Skeleton Screens
   ======================================== */

.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-bg-secondary, #080b12) 25%,
        var(--color-bg-tertiary, #0d1119) 50%,
        var(--color-bg-secondary, #080b12) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s infinite linear;
    border-radius: var(--radius-sm, 3px);
}

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

/* Skeleton variants */
.skeleton-text {
    height: 1em;
    margin-bottom: 0.5em;
}

.skeleton-text:last-child {
    width: 60%;
}

.skeleton-title {
    height: 1.5em;
    width: 80%;
    margin-bottom: 1em;
}

.skeleton-image {
    aspect-ratio: 1;
    width: 100%;
}

.skeleton-button {
    height: 48px;
    width: 120px;
}

/* Product card skeleton */
.product-card-skeleton {
    padding: var(--space-md, 1rem);
}

.product-card-skeleton .skeleton-image {
    margin-bottom: var(--space-md, 1rem);
}

/* ========================================
   Loading Indicators
   ======================================== */

/* Premium spinner */
.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-bg-tertiary, #0d1119);
    border-top-color: var(--color-accent, #d4af37);
    border-radius: 50%;
    animation: spinner-rotate 0.8s linear infinite;
}

.loading-spinner--small {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

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

/* Dots loading */
.loading-dots {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    align-items: center;
}

.loading-dots span {
    width: 8px;
    height: 8px;
    background: var(--color-accent, #d4af37);
    border-radius: 50%;
    animation: dot-bounce 1.4s infinite ease-in-out both;
}

.loading-dots span:nth-child(1) { animation-delay: -0.32s; }
.loading-dots span:nth-child(2) { animation-delay: -0.16s; }
.loading-dots span:nth-child(3) { animation-delay: 0s; }

@keyframes dot-bounce {
    0%, 80%, 100% {
        transform: scale(0);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* ========================================
   Modal Transitions
   ======================================== */

.modal,
.lore-modal,
.image-lightbox {
    opacity: 0;
    visibility: hidden;
    transition:
        opacity var(--duration-normal) var(--ease-out-quart),
        visibility var(--duration-normal);
}

.modal.open,
.modal[aria-hidden="false"],
.lore-modal.open,
.lore-modal[aria-hidden="false"],
.image-lightbox.open,
.image-lightbox[aria-hidden="false"] {
    opacity: 1;
    visibility: visible;
}

.modal__content,
.lore-modal__dialog,
.image-lightbox__dialog {
    transform: translateY(20px) scale(0.95);
    transition: transform var(--duration-normal) var(--ease-spring);
}

.modal.open .modal__content,
.lore-modal.open .lore-modal__dialog,
.lore-modal[aria-hidden="false"] .lore-modal__dialog,
.image-lightbox.open .image-lightbox__dialog,
.image-lightbox[aria-hidden="false"] .image-lightbox__dialog {
    transform: translateY(0) scale(1);
}

/* Mobile slide-up modal */
@media (max-width: 767px) {
    .lore-modal__dialog,
    .modal__content {
        transform: translateY(100%);
        transition: transform var(--duration-slow) var(--ease-out-expo);
    }

    .lore-modal.open .lore-modal__dialog,
    .lore-modal[aria-hidden="false"] .lore-modal__dialog,
    .modal.open .modal__content {
        transform: translateY(0);
    }
}

/* ========================================
   Add to Cart Animation
   ======================================== */

.btn-add-cart.adding,
.add-to-cart-btn.adding {
    pointer-events: none;
}

.btn-add-cart.added,
.add-to-cart-btn.added {
    animation: cart-success 0.5s var(--ease-spring);
}

@keyframes cart-success {
    0%, 100% { transform: scale(1); }
    30% { transform: scale(1.1); }
    50% { transform: scale(0.95); }
}

/* ========================================
   Focus States
   ======================================== */

:focus-visible {
    outline: 2px solid var(--color-accent, #d4af37);
    outline-offset: 2px;
    transition: outline-offset var(--duration-fast) ease;
}

:focus-visible:active {
    outline-offset: 0;
}

/* ========================================
   Bottom Navigation Transitions
   ======================================== */

.bottom-nav-item {
    transition:
        color var(--duration-fast) ease,
        transform var(--duration-fast) var(--ease-spring);
}

.bottom-nav-item:active {
    transform: scale(0.92);
}

.bottom-nav-icon {
    transition: transform var(--duration-fast) var(--ease-spring);
}

.bottom-nav-item:active .bottom-nav-icon {
    transform: scale(0.85);
}

/* ========================================
   Filter Button Transitions
   ======================================== */

.filter-btn {
    transition:
        background-color var(--duration-fast) ease,
        border-color var(--duration-fast) ease,
        color var(--duration-fast) ease,
        transform var(--duration-fast) var(--ease-spring);
}

.filter-btn:active {
    transform: scale(0.96);
}

/* ========================================
   Reduced Motion
   ======================================== */

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

    .skeleton {
        animation: none;
        background: var(--color-bg-secondary, #080b12);
    }

    main {
        animation: none;
        opacity: 1;
    }
}