:root {
    --primary: #2196F3;
    --primary-rgb: 33, 150, 243;
    --body-bg: #F8F9FB;
    --text: #373f50;
    --muted: #7d879c;
    --border: #e3e9ef;
    --success: #42d697;
    --white: #fff;
    --radius: .4375rem;
    --shadow: 0 .275rem 1.25rem rgba(4, 9, 20, .075);
    --shadow-lg: 0 .5rem 2rem rgba(4, 9, 20, .12);
    --container: 1320px;
}

*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--text);
    background-color: var(--body-bg);
    -webkit-font-smoothing: antialiased;
}

img {
    display: block;
    max-width: 100%;
    height: auto;
}

a {
    color: var(--primary);
    text-decoration: none;
}

h1, h3 {
    margin: 0;
    font-weight: 600;
    line-height: 1.25;
}

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 1rem;
}

/* header */

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background-color: var(--white);
    box-shadow: var(--shadow);
}

.site-header .container {
    display: flex;
    align-items: center;
    min-height: 68px;
}

.site-header img {
    width: 142px;
}

/* hero */

.hero {
    padding: 3rem 0 4.5rem;
    background-color: var(--primary);
}

.hero h1 {
    color: var(--white);
    font-size: 1.75rem;
}

/* search bar */

.search-bar {
    position: relative;
    z-index: 10;
    margin-top: -2.5rem;
}

.search-bar-inner {
    display: flex;
    flex-direction: column;
    gap: .75rem;
    padding: 1.5rem;
    background-color: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
}

.search-form {
    display: flex;
    width: 100%;
}

.search-input {
    flex: 1 1 auto;
    min-width: 0;
    padding: .575rem .875rem;
    font-family: inherit;
    font-size: 1rem;
    color: var(--text);
    background-color: var(--white);
    border: 1px solid var(--border);
    border-right: 0;
    border-radius: var(--radius) 0 0 var(--radius);
}

.search-input::placeholder {
    color: var(--muted);
}

.search-input:focus {
    outline: 0;
    border-color: var(--primary);
    box-shadow: 0 .375rem .625rem -0.3125rem rgba(var(--primary-rgb), .15);
}

.search-form .btn {
    border-radius: 0 var(--radius) var(--radius) 0;
}

/* buttons */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    padding: .575rem 1.25rem;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 500;
    color: var(--white);
    background-color: var(--primary);
    border: 1px solid var(--primary);
    border-radius: var(--radius);
    cursor: pointer;
    transition: opacity .2s ease-in-out;
}

.btn:hover {
    opacity: .88;
}

.btn svg {
    flex: 0 0 auto;
    width: 1rem;
    height: 1rem;
    fill: currentColor;
}

/* category filter */

.filter {
    position: relative;
}

.filter-toggle {
    width: 100%;
}

.filter-menu {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: calc(100% + .25rem);
    z-index: 30;
    width: 100%;
    max-height: 320px;
    overflow-y: auto;
    padding: .5rem 0;
    background-color: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
}

.filter-menu.show {
    display: block;
}

.filter-item {
    display: block;
    padding: .4375rem 1.25rem;
    color: var(--text);
    white-space: nowrap;
}

.filter-item:hover {
    color: var(--primary);
    background-color: var(--body-bg);
}

/* content */

.content {
    padding: 2rem 0 3rem;
}

.section {
    margin-bottom: 2rem;
}

.category-title {
    display: flex;
    align-items: center;
    height: 100px;
    margin-bottom: 1.5rem;
    padding: 0 1.5rem;
    background-color: rgba(var(--primary-rgb), .09);
    border-radius: var(--radius);
}

.category-title span {
    font-size: 1.75rem;
    font-weight: 500;
}

/* carousel */

.carousel {
    position: relative;
}

.carousel-track {
    display: flex;
    gap: 1rem;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    scrollbar-width: none;
}

.carousel-track::-webkit-scrollbar {
    display: none;
}

.carousel-track > * {
    flex: 0 0 100%;
    scroll-snap-align: start;
}

.carousel-control {
    display: none;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 5;
    width: 2.75rem;
    height: 2.75rem;
    padding: 0;
    color: var(--text);
    background-color: var(--white);
    border: 0;
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
}

.carousel-control svg {
    width: 1rem;
    height: 1rem;
    fill: currentColor;
}

.carousel-control[data-control="prev"] {
    left: -.75rem;
}

.carousel-control[data-control="next"] {
    right: -.75rem;
}

.banners img {
    width: 100%;
    border-radius: var(--radius);
}

/* products */

.product-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.product-card {
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    background-color: var(--white);
    border-radius: var(--radius);
    box-shadow: 0 .1875rem .75rem rgba(4, 9, 20, .1);
    transition: transform .2s ease-in-out, box-shadow .2s ease-in-out;
}

.product-card:hover {
    transform: translateY(-.25rem);
    box-shadow: var(--shadow-lg);
}

.product-image {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
}

.product-image-empty {
    padding: 2.5rem;
    object-fit: contain;
    background-color: var(--body-bg);
    opacity: .35;
}

.product-card-inline {
    flex-direction: row;
}

.product-card-inline .product-image {
    position: absolute;
    left: 0;
    top: 0;
    width: 120px;
    height: 100%;
    aspect-ratio: auto;
}

.product-card-inline .product-image-empty {
    padding: 1rem;
}

.product-card-inline .product-body {
    margin-left: 120px;
    overflow: hidden;
}

.product-body {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    flex: 1 1 auto;
    padding: 1.25rem;
}

.product-title {
    margin-bottom: .25rem;
    font-size: 1rem;
    font-weight: 500;
}

.product-meta {
    display: block;
    font-size: .875rem;
    color: var(--muted);
}

.product-prices {
    display: flex;
    padding-top: 1rem;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: .5rem;
}

.price {
    padding: .25rem .5rem;
    font-size: .875rem;
    color: var(--primary);
    background-color: rgba(var(--primary-rgb), .09);
    border-radius: .25rem;
}

.price-sale {
    color: var(--white);
    background-color: var(--success);
}

.price-old {
    font-size: .75rem;
}

.sale-badge {
    position: absolute;
    top: .75rem;
    left: .75rem;
    z-index: 2;
    padding: .25rem .5rem;
    font-size: .75rem;
    font-weight: 500;
    color: var(--white);
    background-color: var(--success);
    border-radius: .25rem;
}

/* footer */

.site-footer {
    margin-top: auto;
    padding: 1.5rem 0;
    background-color: var(--primary);
}

.site-footer p {
    margin: 0;
    font-size: .8125rem;
    color: var(--white);
    text-align: center;
}

.site-footer a {
    color: var(--white);
}

/* scroll to top */

.scroll-top {
    display: flex;
    align-items: center;
    justify-content: center;
    position: fixed;
    right: 1.25rem;
    bottom: 1.25rem;
    z-index: 40;
    width: 2.75rem;
    height: 2.75rem;
    color: var(--text);
    background-color: var(--white);
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: opacity .25s ease-in-out, visibility .25s ease-in-out;
}

.scroll-top.show {
    opacity: 1;
    visibility: visible;
}

.scroll-top svg {
    width: 1rem;
    height: 1rem;
    fill: currentColor;
}

/* error page */

.error-page {
    display: flex;
    flex: 1 1 auto;
    align-items: center;
    justify-content: center;
    padding: 3rem 0;
    text-align: center;
}

.error-page img {
    max-width: 240px;
    margin: 0 auto 2.5rem;
}

.error-page h1 {
    margin-bottom: .75rem;
    font-size: 2.5rem;
    letter-spacing: .05em;
}

.error-page p {
    margin: 0 0 2rem;
    font-size: 1.125rem;
    color: var(--muted);
}

@media (min-width: 500px) {
    .carousel-products .carousel-track > * {
        flex: 0 0 calc(50% - .5rem);
    }
}

@media (min-width: 576px) {
    .carousel-control {
        display: flex;
    }
}

@media (min-width: 768px) {
    .search-bar-inner {
        flex-direction: row;
        align-items: center;
    }

    .filter-toggle {
        width: auto;
    }

    .filter-menu {
        left: auto;
        width: auto;
        min-width: 220px;
    }

    .hero h1 {
        font-size: 2.25rem;
    }

    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .carousel-products .carousel-track > * {
        flex: 0 0 calc(33.3333% - .6667rem);
    }
}

@media (min-width: 1100px) {
    .carousel-products .carousel-track > * {
        flex: 0 0 calc(25% - .75rem);
    }
}