/* ==========================================================================
   MUMU CHAN JAPAN - Modern Japanese E-Commerce Stylesheet
   Theme: Japanese Kohaku (Red #dc2626 & White #ffffff)
   Includes: Preloader, Skeleton Loading, Animations, Smart UX Tokens
   ========================================================================== */

:root {
    --jp-red-50: #fef2f2;
    --jp-red-100: #fee2e2;
    --jp-red-200: #fecaca;
    --jp-red-500: #ef4444;
    --jp-red-600: #dc2626;
    --jp-red-700: #b91c1c;
    --jp-red-800: #991b1b;
    --mobile-bottom-nav-offset: 6.5rem;
}

@media (min-width: 768px) {
    :root {
        --mobile-bottom-nav-offset: 0px;
    }
}

/* ==========================================================================
   1. Page Preloader & Smooth Transitions
   ========================================================================== */
#page-preloader {
    position: fixed;
    inset: 0;
    z-index: 99999;
    background: #ffffff;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

#page-preloader.loaded {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.preloader-spinner {
    width: 52px;
    height: 52px;
    border: 3.5px solid #fee2e2;
    border-top-color: #dc2626;
    border-radius: 50%;
    animation: preloader-spin 0.8s cubic-bezier(0.68, -0.55, 0.27, 1.55) infinite;
}

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

/* ==========================================================================
   2. Skeleton Loading Shimmer Engine
   ========================================================================== */
.skeleton {
    position: relative;
    overflow: hidden;
    background-color: #f3f4f6 !important;
    border-color: #e5e7eb !important;
    color: transparent !important;
    user-select: none;
}

.skeleton * {
    visibility: hidden !important;
}

.skeleton::after {
    content: "";
    position: absolute;
    inset: 0;
    transform: translateX(-100%);
    background-image: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.65) 50%,
        rgba(255, 255, 255, 0) 100%
    );
    animation: skeleton-shimmer 1.5s infinite;
}

@keyframes skeleton-shimmer {
    100% {
        transform: translateX(100%);
    }
}

.skeleton-box {
    border-radius: 0.75rem;
    min-height: 1.25rem;
}

/* ==========================================================================
   3. Smart Micro-Animations & Interactivity
   ========================================================================== */
.hover-lift {
    transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.25s ease;
}
.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px -6px rgba(220, 38, 38, 0.12), 0 4px 8px -4px rgba(0, 0, 0, 0.05);
}

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

.badge-pulse {
    animation: badge-pulse-anim 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes badge-pulse-anim {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.85; transform: scale(1.05); }
}

/* Cart Badge Bounce Animation */
@keyframes cart-bounce {
    0%, 100% { transform: scale(1); }
    30% { transform: scale(1.35) rotate(-10deg); }
    60% { transform: scale(1.2) rotate(10deg); }
    80% { transform: scale(1.05); }
}

.cart-badge-bump {
    animation: cart-bounce 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 7px;
    height: 7px;
}
::-webkit-scrollbar-track {
    background: #f8fafc;
}
::-webkit-scrollbar-thumb {
    background: #fca5a5;
    border-radius: 9999px;
}
::-webkit-scrollbar-thumb:hover {
    background: #dc2626;
}

/* Glassmorphic Surfaces */
.glass-panel {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(254, 226, 226, 0.8);
}

/* AI Chat Widget Positioning & Gestures */
#ai-chat-widget {
    width: 56px !important;
    height: 56px !important;
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
}

#ai-chat-btn {
    width: 56px !important;
    height: 56px !important;
    min-width: 56px !important;
    min-height: 56px !important;
    max-width: 56px !important;
    max-height: 56px !important;
    aspect-ratio: 1 / 1 !important;
    border-radius: 9999px !important;
    flex-shrink: 0 !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    box-sizing: border-box !important;
}

#ai-chat-widget.is-dragging #ai-chat-btn {
    cursor: grabbing;
    transform: scale(1.08);
}

/* Hide Back to Top button completely on mobile */
@media (max-width: 767px) {
    #backToTopBtn {
        display: none !important;
    }
}

/* Desktop Chat Box Docking */
@media (min-width: 768px) {
    #ai-chat-widget.snap-left #ai-chat-box {
        left: 0;
        right: auto;
        transform-origin: bottom left;
    }

    #ai-chat-widget.snap-right #ai-chat-box {
        right: 0;
        left: auto;
        transform-origin: bottom right;
    }
}

/* Mobile Full-Width Responsive Chat Drawer (No squishing!) */
@media (max-width: 767px) {
    #ai-chat-box {
        position: fixed !important;
        left: 0.75rem !important;
        right: 0.75rem !important;
        bottom: 0.75rem !important;
        top: auto !important;
        width: calc(100vw - 1.5rem) !important;
        max-width: none !important;
        height: min(560px, 80vh) !important;
        max-height: 82vh !important;
        margin: 0 !important;
        display: flex !important;
        flex-direction: column !important;
        transform-origin: bottom center !important;
        z-index: 100 !important;
        box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.4) !important;
    }
    #ai-chat-box.hidden {
        display: none !important;
    }
    #ai-chat-box.scale-100 {
        transform: scale(1) translateY(0) !important;
        opacity: 1 !important;
    }
    #ai-chat-box.scale-0 {
        transform: scale(0.92) translateY(20px) !important;
        opacity: 0 !important;
    }
    #ai-chat-messages {
        flex: 1 1 auto !important;
        height: auto !important;
        min-height: 0 !important;
    }
}

.mobile-action-bar {
    bottom: calc(var(--mobile-bottom-nav-offset) + env(safe-area-inset-bottom, 0px));
}

@media (max-width: 767px) {
    .cart-drawer-footer {
        padding-bottom: calc(1.5rem + env(safe-area-inset-bottom, 0px));
    }
}

/* Out of Stock Grayscale */
.product-card.is-out-of-stock img,
.product-detail.is-out-of-stock .product-image-wrap img {
    filter: grayscale(1);
    opacity: 0.5;
}

.product-card.is-out-of-stock {
    background-color: #f9fafb;
}

.product-card.is-out-of-stock .p-4 > a,
.product-detail.is-out-of-stock h1 {
    color: #6b7280;
}

/* ==========================================================================
   Product Description & Rich Text (Prose)
   ========================================================================== */
.prose {
    color: #334155;
    line-height: 1.8;
    font-size: 0.95rem;
}
.prose p {
    margin-bottom: 0.85rem;
}
.prose p:last-child {
    margin-bottom: 0;
}
.prose h1, .prose h2, .prose h3, .prose h4 {
    color: #0f172a;
    font-weight: 700;
    margin-top: 1.25rem;
    margin-bottom: 0.5rem;
}
.prose ul, .prose ol {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}
.prose ul {
    list-style-type: disc;
}
.prose ol {
    list-style-type: decimal;
}
.prose li {
    margin-bottom: 0.35rem;
}
.prose strong, .prose b {
    color: #0f172a;
    font-weight: 700;
}
.prose img {
    max-width: 100%;
    height: auto;
    border-radius: 1rem;
    margin: 1rem 0;
}
.prose table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
}
.prose th, .prose td {
    border: 1px solid #e2e8f0;
    padding: 0.5rem 0.75rem;
}

/* ==========================================================================
   UX/UI Polish: Dynamic Navbar, Search, Cards, and Modals
   ========================================================================== */

/* 1. Header Smooth Morph on Scroll */
#main-header {
    transition: background-color 0.3s ease, backdrop-filter 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
#main-header.is-scrolled {
    background-color: rgba(255, 255, 255, 0.94) !important;
    backdrop-filter: blur(16px) !important;
    -webkit-backdrop-filter: blur(16px) !important;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(220, 38, 38, 0.03) !important;
    border-bottom-color: rgba(220, 38, 38, 0.15) !important;
}
#header-inner-row {
    transition: height 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
#main-header.is-scrolled #header-inner-row {
    height: 3.5rem !important; /* 56px */
}
@media (min-width: 640px) {
    #main-header.is-scrolled #header-inner-row {
        height: 4.25rem !important; /* 68px */
    }
}
#header-brand-logo {
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
#main-header.is-scrolled #header-brand-logo {
    transform: scale(0.92);
}

/* 2. Product Card Hover & Quick View Overlay */
.product-card-enhanced {
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s ease;
}
.product-card-enhanced:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 30px -10px rgba(0, 0, 0, 0.07), 0 4px 10px -2px rgba(220, 38, 38, 0.05);
    border-color: rgba(220, 38, 38, 0.3);
}
.quick-view-overlay-btn {
    opacity: 0;
    transform: translateY(6px);
    transition: opacity 0.2s ease-out, transform 0.2s ease-out;
}
.product-card-enhanced:hover .quick-view-overlay-btn {
    opacity: 1;
    transform: translateY(0);
}

/* 3. Search Autocomplete Keyboard Highlight */
.search-suggest-item.is-selected {
    background-color: #fef2f2 !important;
    color: #dc2626 !important;
}

/* 4. Toast Progress Bar Drain */
@keyframes toastProgressDrain {
    0% { width: 100%; }
    100% { width: 0%; }
}
.toast-progress-bar {
    animation: toastProgressDrain 3s linear forwards;
}

/* 5. Skeleton Shimmer Wave Effect */
.skeleton-shimmer {
    background: linear-gradient(90deg, #f5f5f4 25%, #e7e5e4 50%, #f5f5f4 75%);
    background-size: 200% 100%;
    animation: shimmerWave 1.6s infinite ease-in-out;
}
@keyframes shimmerWave {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Image Lazy Fade-In */
.img-lazy-fade {
    opacity: 0;
    transition: opacity 0.4s ease-in-out;
}
.img-lazy-fade.is-loaded {
    opacity: 1;
}

/* 6. Smooth Scroll Reveal */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: opacity, transform;
}
.reveal-on-scroll.is-revealed {
    opacity: 1;
    transform: translateY(0);
}

/* 7. Cart Icon Micro-Interaction Bounce */
@keyframes cartBounce {
    0%, 100% { transform: scale(1); }
    25% { transform: scale(1.35) rotate(-10deg); }
    50% { transform: scale(0.9) rotate(8deg); }
    75% { transform: scale(1.1) rotate(-3deg); }
}
.animate-cart-bounce {
    animation: cartBounce 0.65s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Flying Product Thumbnail to Cart */
.flying-cart-ghost {
    position: fixed;
    z-index: 99999;
    pointer-events: none;
    border-radius: 1.25rem;
    object-fit: cover;
    box-shadow: 0 15px 35px -5px rgba(220, 38, 38, 0.4), 0 5px 15px rgba(0, 0, 0, 0.2);
    border: 2px solid white;
    transition: transform 0.75s cubic-bezier(0.19, 1, 0.22, 1), opacity 0.75s cubic-bezier(0.19, 1, 0.22, 1), width 0.75s ease, height 0.75s ease;
}