:root {
    /* Dark Mode Defaults */
    --bg-color: #1f1f1f;
    --card-bg: #2a2a2a;
    --text-color: #f3f4f6;
    --border-color: #eab308; /* yellow */
    --topbar-bg: rgba(42, 42, 42, 0.75);
    --input-bg: #333;
    --brand-accent: #eab308;
}

body.light-mode {
    --bg-color: #f3f4f6;
    --card-bg: #ffffff;
    --text-color: #1f2937;
    --border-color: #9ca3af; /* grey */
    --topbar-bg: rgba(229, 231, 235, 0.65); /* matching input-bg */
    --input-bg: #e5e7eb; /* same as rgb(229, 231, 235) */
    --brand-accent: #4b5563; /* grey */
}

body.light-mode .top-bar {
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
    overflow-x: hidden;
}

.top-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--topbar-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    z-index: 1000;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    padding: 0.5rem 0;
    transition: background-color 0.3s;
}

.top-bar-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0 1rem;
}

.brand-title {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 800;
    background: linear-gradient(45deg, #eab308, #f59e0b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

body.light-mode .brand-title {
    background: none;
    -webkit-text-fill-color: var(--brand-accent);
}

.icon-btn {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: background 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    background: var(--input-bg);
}

.controls-group {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.control-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.checkbox-group {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.color-label {
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.9rem;
    padding: 0.15rem 0.35rem;
    background: transparent;
    border-radius: 4px;
    transition: background 0.2s, filter 0.2s;
}

.color-label:hover {
    background: var(--input-bg);
    filter: brightness(1.2);
}

.hidden-checkbox {
    display: none;
}

.custom-checkbox {
    width: 18px;
    height: 18px;
    border: 2px solid var(--item-color);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--input-bg);
    position: relative;
}

/* For white/grey visibility on light theme */
body.light-mode .custom-checkbox {
    box-shadow: 0 0 2px rgba(0,0,0,0.2);
}

.hidden-checkbox:checked + .custom-checkbox::after {
    content: '';
    position: absolute;
    width: 6px;
    height: 12px;
    border: solid var(--item-color);
    border-width: 0 4px 4px 0;
    transform: rotate(45deg);
    margin-bottom: 2px;
}

.radio-label {
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    color: var(--brand-accent);
    font-weight: 600;
}

.primary-btn {
    background-color: #eab308;
    color: #1f2937;
    border: none;
    padding: 0.5rem 1rem;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    transition: transform 0.1s, background-color 0.2s;
}

.primary-btn:hover {
    background-color: #f59e0b;
}

.primary-btn:active {
    transform: scale(0.95);
}

.speed-control {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.main-content {
    margin-top: 70px; /* Space for fixed top bar */
    padding: 2rem;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

/* Grid Layouts */
.product-grid {
    display: grid;
    gap: 2rem;
    justify-content: center;
}

.product-grid.cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

.product-grid.cols-5 {
    grid-template-columns: repeat(5, 1fr);
}

/* Animations */
@keyframes fadeSlideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes skeletonPulse {
    0% { background-color: #374151; }
    50% { background-color: #4b5563; }
    100% { background-color: #374151; }
}

@keyframes skeletonPulseLight {
    0% { background-color: #e5e7eb; }
    50% { background-color: #d1d5db; }
    100% { background-color: #e5e7eb; }
}

body.light-mode .product-card.skeleton {
    animation: fadeSlideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards, skeletonPulseLight 1.5s infinite;
}

/* Product Card */
.product-card {
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    transition: box-shadow 0.3s, border-color 0.3s;
    border: 4px solid var(--border-color);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    animation: fadeSlideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    position: relative; /* For the name overlay */
}

.product-card.skeleton {
    animation: fadeSlideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards, skeletonPulse 1.5s infinite;
}

.product-card:hover {
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
    filter: brightness(1.1);
}

.product-card img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    display: block;
    opacity: 0; /* Start hidden for skeleton */
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s ease;
}

.product-card img.loaded {
    opacity: 1;
}

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

.product-name-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.6);
    color: #fff;
    padding: 0.75rem;
    font-weight: 600;
    text-align: center;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    box-sizing: border-box;
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    pointer-events: none; /* Let clicks pass through to the image link */
}

.product-card:hover .product-name-overlay {
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .desktop-only {
        display: none !important;
    }
    
    .product-grid.cols-3, .product-grid.cols-5 {
        grid-template-columns: 1fr;
    }

    .main-content {
        margin-top: 200px; /* More space for wrapped top bar */
    }
}

/* Custom Range Slider */
input[type=range] {
    -webkit-appearance: none;
    appearance: none;
    background: transparent;
}
input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 16px;
    width: 8px;
    border-radius: 4px;
    background: var(--brand-accent);
    cursor: pointer;
    margin-top: -6px;
}
input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
}
body.light-mode input[type=range]::-webkit-slider-runnable-track {
    background: rgba(0, 0, 0, 0.2);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(100, 100, 100, 0.3);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(100, 100, 100, 0.6);
}