:root {
    --shop-transition-fast: 150ms;
    --shop-transition-normal: 250ms;
    --shop-transition-slow: 400ms;
    --shop-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shop-shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shop-shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shop-shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.02);
    }
}

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

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

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

.animate-fade-in {
    animation: fadeIn var(--shop-transition-normal) ease-out forwards;
}

.animate-fade-in-up {
    animation: fadeInUp var(--shop-transition-normal) ease-out forwards;
}

.animate-fade-in-down {
    animation: fadeInDown var(--shop-transition-normal) ease-out forwards;
}

.animate-slide-in-left {
    animation: slideInLeft var(--shop-transition-normal) ease-out forwards;
}

.animate-slide-in-right {
    animation: slideInRight var(--shop-transition-normal) ease-out forwards;
}

.animate-scale-in {
    animation: scaleIn var(--shop-transition-normal) ease-out forwards;
}

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

.animate-spin {
    animation: spin 1s linear infinite;
}

.animate-bounce {
    animation: bounce 1s ease-in-out infinite;
}

.stagger-1 { animation-delay: 50ms; }
.stagger-2 { animation-delay: 100ms; }
.stagger-3 { animation-delay: 150ms; }
.stagger-4 { animation-delay: 200ms; }
.stagger-5 { animation-delay: 250ms; }

.skeleton {
    background: linear-gradient(
        90deg,
        #f0f0f0 25%,
        #e0e0e0 50%,
        #f0f0f0 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
    border-radius: 4px;
}

.skeleton-text {
    height: 1em;
    margin-bottom: 0.5em;
}

.skeleton-title {
    height: 1.5em;
    width: 60%;
    margin-bottom: 0.75em;
}

.skeleton-image {
    height: 200px;
    width: 100%;
}

.skeleton-card {
    padding: 16px;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shop-shadow-sm);
}

.scrollbar-hide::-webkit-scrollbar {
    display: none;
}

.scrollbar-hide {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

.scrollbar-thin::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

.scrollbar-thin::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 3px;
}

.scrollbar-thin::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 3px;
}

.scrollbar-thin::-webkit-scrollbar-thumb:hover {
    background: #a1a1a1;
}

.product-card {
    transition: transform var(--shop-transition-normal) ease,
                box-shadow var(--shop-transition-normal) ease;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shop-shadow-lg);
}

.product-card .product-image {
    transition: transform var(--shop-transition-slow) ease;
}

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

.btn-hover-lift {
    transition: transform var(--shop-transition-fast) ease,
                box-shadow var(--shop-transition-fast) ease;
}

.btn-hover-lift:hover {
    transform: translateY(-2px);
    box-shadow: var(--shop-shadow-md);
}

.btn-hover-scale {
    transition: transform var(--shop-transition-fast) ease;
}

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

.shop-section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--shop-transition-slow) ease,
                transform var(--shop-transition-slow) ease;
}

.shop-section.visible {
    opacity: 1;
    transform: translateY(0);
}

.video-card {
    position: relative;
    overflow: hidden;
    border-radius: 16px;
    cursor: pointer;
}

.video-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to top,
        rgba(0, 0, 0, 0.6) 0%,
        transparent 50%
    );
    z-index: 1;
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--shop-transition-normal) ease;
}

.video-card:hover::before {
    opacity: 1;
}

.video-play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    transition: transform var(--shop-transition-normal) ease,
                box-shadow var(--shop-transition-normal) ease;
    z-index: 2;
}

.video-card:hover .video-play-btn {
    transform: translate(-50%, -50%) scale(1.1);
    box-shadow: 0 6px 30px rgba(0, 0, 0, 0.4);
}

.brand-carousel-section .brand-logo-img,
.brand-item .brand-logo-img {
    filter: grayscale(100%);
    opacity: 0.6;
    transition: filter var(--shop-transition-normal) ease,
                opacity var(--shop-transition-normal) ease,
                transform var(--shop-transition-normal) ease;
}

.brand-carousel-section .brand-logo-img:hover,
.brand-item .brand-logo-img:hover,
.brand-item:hover .brand-logo-img {
    filter: grayscale(0%);
    opacity: 1;
    transform: scale(1.05);
}

.tab-btn {
    position: relative;
    overflow: hidden;
}

.tab-btn::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-color, #3b82f6);
    transition: width var(--shop-transition-normal) ease,
                left var(--shop-transition-normal) ease;
}

.tab-btn.active::after,
.tab-btn:hover::after {
    width: 100%;
    left: 0;
}

.countdown-item {
    position: relative;
    overflow: hidden;
}

.countdown-value {
    display: inline-block;
    font-variant-numeric: tabular-nums;
    transition: transform var(--shop-transition-fast) ease;
}

.countdown-value.flip {
    animation: flipNumber 0.3s ease-out;
}

@keyframes flipNumber {
    0% {
        transform: translateY(-100%);
        opacity: 0;
    }
    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-backdrop {
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.loading-spinner {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.loading-spinner svg {
    animation: spin 1s linear infinite;
}

.loading-spinner .spinner-circle {
    stroke: var(--primary-color, #3b82f6);
    stroke-dasharray: 60;
    stroke-dashoffset: 45;
}

.empty-state {
    text-align: center;
    padding: 64px 24px;
    color: #9ca3af;
}

.empty-state svg {
    margin: 0 auto 16px;
    opacity: 0.5;
}

.empty-state p {
    font-size: 1rem;
    margin: 0;
}

.focus-ring:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}

.focus-ring:focus-visible {
    outline: 2px solid var(--primary-color, #3b82f6);
    outline-offset: 2px;
}

@media (prefers-color-scheme: dark) {
    .dark-mode-support {
        --shop-bg: #1f2937;
        --shop-text: #f9fafb;
        --shop-border: #374151;
    }
}

@media print {
    .shop-page {
        background: white !important;
    }

    .no-print {
        display: none !important;
    }
}

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