/* ============================================================
   LUXE JEWELS — Luxury Jewelry E-commerce Styles
   ============================================================ */

/* -------- CSS Reset & Base -------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --color-black: #0a0a0a;
    --color-dark: #1a1a1a;
    --color-text: #2b2b2b;
    --color-muted: #6b6b6b;
    --color-line: #e5e5e5;
    --color-bg: #ffffff;
    --color-bg-alt: #f4f1ed;
    --color-bg-soft: #faf8f5;
    --color-gold: #b88a4a;
    --color-gold-dark: #8a6432;

    --font-serif: 'Cormorant Garamond', 'Times New Roman', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    --header-height: 96px;
    --transition: 0.3s ease;
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.55;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; transition: opacity var(--transition); }
a:hover { opacity: 0.7; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 32px;
}

/* -------- Announcement Bar -------- */
.announcement-bar {
    background: var(--color-black);
    color: #fff;
    text-align: center;
    padding: 10px 20px;
    font-size: 12px;
    letter-spacing: 1px;
    font-weight: 300;
}

/* -------- Header -------- */
.site-header {
    background: #fff;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--color-line);
}

.header-inner {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    padding: 18px 32px;
    gap: 20px;
}

.header-left, .header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}
.header-right { justify-content: flex-end; }

.icon-btn {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--color-black);
    position: relative;
    border-radius: 50%;
    transition: background var(--transition);
}
.icon-btn:hover { background: var(--color-bg-alt); opacity: 1; }

.cart-badge {
    position: absolute;
    top: 4px;
    right: 4px;
    background: var(--color-black);
    color: #fff;
    font-size: 10px;
    font-weight: 600;
    min-width: 18px;
    height: 18px;
    border-radius: 9px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 5px;
}

.brand-logo {
    font-family: var(--font-serif);
    font-size: 28px;
    font-weight: 500;
    letter-spacing: 6px;
    text-align: center;
    color: var(--color-black);
}

.main-nav {
    border-top: 1px solid var(--color-line);
}
.main-nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 40px;
    padding: 18px 32px;
}
.main-nav a {
    font-size: 13px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    font-weight: 400;
    color: var(--color-dark);
    position: relative;
    padding: 4px 0;
}
.main-nav a::after {
    content: '';
    position: absolute;
    left: 0; right: 0; bottom: 0;
    height: 1px;
    background: var(--color-black);
    transform: scaleX(0);
    transition: transform var(--transition);
}
.main-nav a:hover { opacity: 1; }
.main-nav a:hover::after { transform: scaleX(1); }

/* -------- Mobile Menu -------- */
.menu-toggle { display: none; }

.mobile-menu {
    position: fixed;
    top: 0; left: -320px;
    width: 300px;
    max-width: 85vw;
    height: 100vh;
    background: #fff;
    z-index: 200;
    padding: 20px 28px;
    transition: left var(--transition);
    overflow-y: auto;
}
.mobile-menu.active { left: 0; }
.mobile-menu-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 199;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition);
}
.mobile-menu-overlay.active { opacity: 1; pointer-events: all; }
.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-line);
    margin-bottom: 20px;
    font-family: var(--font-serif);
    font-size: 22px;
    letter-spacing: 4px;
}
.mobile-nav-list { list-style: none; }
.mobile-nav-list li { border-bottom: 1px solid var(--color-line); }
.mobile-nav-list a {
    display: block;
    padding: 16px 0;
    font-size: 14px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
}

/* -------- Hero Banner -------- */
.hero-banner {
    position: relative;
    height: 92vh;
    min-height: 600px;
    overflow: hidden;
    color: #fff;
}
.hero-banner img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(0,0,0,0.45) 100%);
}
.hero-content {
    position: absolute;
    left: 0; right: 0; bottom: 0;
    padding: 60px 56px;
    max-width: 720px;
}
.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(36px, 5vw, 60px);
    font-weight: 400;
    line-height: 1.1;
    margin-bottom: 18px;
}
.hero-description {
    font-size: 15px;
    line-height: 1.6;
    margin-bottom: 28px;
    max-width: 460px;
    font-weight: 300;
}
.hero-cta {
    display: inline-block;
    font-size: 13px;
    letter-spacing: 2px;
    text-transform: uppercase;
    padding: 4px 0;
    border-bottom: 1px solid #fff;
    color: #fff;
    font-weight: 500;
}

/* -------- New Arrivals Section -------- */
.new-arrivals {
    background: var(--color-bg-soft);
    padding: 0;
    overflow: hidden;
}
.new-arrivals-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    min-height: 520px;
}
.new-arrivals-image {
    position: relative;
}
.new-arrivals-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.new-arrivals-content {
    padding: 60px;
    position: relative;
    display: flex;
    flex-direction: column;
}
.new-arrivals-header {
    text-align: center;
    margin-bottom: 30px;
}
.new-arrivals-header h2 {
    font-family: var(--font-serif);
    font-size: 38px;
    font-weight: 400;
    margin-bottom: 8px;
}
.new-arrivals-header p {
    color: var(--color-muted);
    font-size: 14px;
    margin-bottom: 14px;
}
.new-arrivals-header a {
    font-size: 12px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    border-bottom: 1px solid var(--color-black);
    padding-bottom: 2px;
}

.carousel {
    position: relative;
    flex: 1;
    display: flex;
    align-items: center;
}
.carousel-track {
    display: flex;
    gap: 24px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
    padding: 0 20px;
    width: 100%;
}
.carousel-track::-webkit-scrollbar { display: none; }
.carousel-arrow {
    position: absolute;
    top: -60px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
    transition: background var(--transition);
}
.carousel-arrow:hover { background: var(--color-bg-alt); }
.carousel-arrow.prev { right: 70px; }
.carousel-arrow.next { right: 20px; }

.product-card {
    flex: 0 0 auto;
    width: 260px;
    scroll-snap-align: start;
}
.product-card-image {
    background: #fff;
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    position: relative;
    margin-bottom: 14px;
    overflow: hidden;
}
.product-card-image img {
    max-width: 75%;
    max-height: 75%;
    object-fit: contain;
    transition: transform 0.5s ease;
}
.product-card:hover .product-card-image img { transform: scale(1.05); }
.product-badge {
    position: absolute;
    top: 12px; left: 12px;
    background: #fff;
    color: var(--color-text);
    font-size: 11px;
    padding: 4px 10px;
    letter-spacing: 1px;
    font-weight: 400;
}
.product-card-name {
    font-size: 14px;
    font-weight: 400;
    margin-bottom: 4px;
    color: var(--color-black);
}
.product-card-price {
    font-size: 13px;
    color: var(--color-muted);
}

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 30px;
}
.carousel-dots span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #ccc;
    cursor: pointer;
}
.carousel-dots span.active { background: var(--color-black); }

/* -------- Section Headings -------- */
.section {
    padding: 90px 0;
}
.section-header {
    text-align: left;
    margin-bottom: 50px;
}
.section-title {
    font-family: var(--font-serif);
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 400;
    margin-bottom: 10px;
    line-height: 1.1;
}
.section-subtitle {
    color: var(--color-muted);
    font-size: 15px;
    font-weight: 300;
}

/* -------- Inspiring Creations (For Her / For Him) -------- */
.creations-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}
.creation-card {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4 / 5;
}
.creation-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}
.creation-card:hover img { transform: scale(1.04); }
.creation-card-label {
    position: absolute;
    left: 30px;
    bottom: 30px;
    color: #fff;
    font-size: 13px;
    letter-spacing: 2px;
    text-transform: uppercase;
    padding-bottom: 6px;
    border-bottom: 1px solid #fff;
}

/* -------- Feature Banner (Hotels & Resorts) -------- */
.feature-banner {
    position: relative;
    height: 70vh;
    min-height: 460px;
    color: #fff;
    overflow: hidden;
}
.feature-banner img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.feature-banner-content {
    position: absolute;
    inset: 0;
    padding: 60px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    max-width: 600px;
}
.feature-banner-title {
    font-family: var(--font-serif);
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 400;
    margin-bottom: 14px;
}
.feature-banner-description {
    font-size: 15px;
    margin-bottom: 24px;
    font-weight: 300;
    max-width: 420px;
}
.feature-banner-cta {
    align-self: flex-start;
    color: #fff;
    font-size: 13px;
    letter-spacing: 2px;
    text-transform: uppercase;
    border-bottom: 1px solid #fff;
    padding-bottom: 4px;
}

/* -------- Newsletter Section -------- */
.newsletter-section {
    background: var(--color-bg-soft);
    padding: 80px 0;
}
.newsletter-title {
    font-family: var(--font-serif);
    font-size: clamp(28px, 3.5vw, 38px);
    font-weight: 400;
    margin-bottom: 12px;
}
.newsletter-subtitle {
    color: var(--color-muted);
    font-size: 14px;
    margin-bottom: 30px;
}
.newsletter-form { max-width: 600px; }
.newsletter-label {
    font-size: 12px;
    color: var(--color-muted);
    display: block;
    margin-bottom: 4px;
}
.newsletter-input-row {
    display: flex;
    border-bottom: 1px solid var(--color-black);
    padding-bottom: 8px;
}
.newsletter-input-row input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 15px;
    padding: 8px 0;
    font-family: var(--font-sans);
    color: var(--color-black);
    outline: none;
}
.newsletter-input-row input::placeholder { color: #999; }
.newsletter-submit {
    color: var(--color-black);
    padding: 4px 10px;
}

/* -------- Footer -------- */
.site-footer {
    background: var(--color-bg-alt);
    color: var(--color-text);
    padding: 60px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 280px 1fr 1fr;
    gap: 60px;
    padding: 0 60px 60px;
    max-width: 1400px;
    margin: 0 auto;
}
.footer-promo-card {
    display: block;
    position: relative;
    aspect-ratio: 4 / 5;
    overflow: hidden;
}
.footer-promo-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.footer-promo-content {
    position: absolute;
    left: 20px; bottom: 20px;
    color: #fff;
}
.footer-promo-content h3 {
    font-family: var(--font-serif);
    font-size: 22px;
    font-weight: 400;
    margin-bottom: 8px;
}
.footer-promo-link {
    font-size: 11px;
    letter-spacing: 1.5px;
    border-bottom: 1px solid #fff;
    padding-bottom: 2px;
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 18px;
    color: var(--color-black);
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }
.footer-col a {
    font-size: 13px;
    color: var(--color-text);
    font-weight: 300;
}

.footer-bottom {
    border-top: 1px solid #ddd;
    background: var(--color-bg-alt);
}
.footer-bottom-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 60px;
    max-width: 1400px;
    margin: 0 auto;
    flex-wrap: wrap;
    gap: 20px;
}
.country-selector {
    font-size: 12px;
    color: var(--color-muted);
}
.country-selector strong {
    color: var(--color-black);
    margin-left: 6px;
    font-weight: 500;
}
.social-icons {
    display: flex;
    gap: 16px;
}
.social-icons a {
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--color-black);
}
.footer-copyright {
    text-align: center;
    padding: 16px;
    font-size: 11px;
    color: var(--color-muted);
    border-top: 1px solid #ddd;
}

/* ============================================================
   PRODUCT LISTING PAGE
   ============================================================ */
.page-header {
    padding: 80px 60px 40px;
    text-align: center;
    background: var(--color-bg-soft);
}
.page-header h1 {
    font-family: var(--font-serif);
    font-size: clamp(36px, 5vw, 54px);
    font-weight: 400;
    margin-bottom: 12px;
}
.page-header p {
    color: var(--color-muted);
    font-size: 15px;
    max-width: 600px;
    margin: 0 auto;
}
.breadcrumb {
    font-size: 12px;
    letter-spacing: 1px;
    color: var(--color-muted);
    text-transform: uppercase;
    margin-bottom: 20px;
}
.breadcrumb a { color: var(--color-muted); }
.breadcrumb span { margin: 0 8px; }

.products-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 60px;
    border-bottom: 1px solid var(--color-line);
    flex-wrap: wrap;
    gap: 14px;
}
.products-count { font-size: 13px; color: var(--color-muted); }
.products-sort select {
    border: 1px solid var(--color-line);
    background: #fff;
    padding: 8px 12px;
    font-size: 13px;
    font-family: var(--font-sans);
    color: var(--color-black);
    cursor: pointer;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    padding: 50px 60px 80px;
}
.products-grid .product-card { width: 100%; }
.products-grid .product-card-image { background: var(--color-bg-soft); }

.no-products {
    text-align: center;
    padding: 80px 20px;
    color: var(--color-muted);
}

/* ============================================================
   PRODUCT DETAILS PAGE
   ============================================================ */
.product-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    padding: 50px 60px;
    max-width: 1400px;
    margin: 0 auto;
}
.product-gallery {
    background: var(--color-bg-soft);
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px;
}
.product-gallery img {
    max-width: 80%;
    max-height: 80%;
    object-fit: contain;
}
.product-info { padding-top: 20px; }
.product-info .breadcrumb { margin-bottom: 24px; }
.product-info h1 {
    font-family: var(--font-serif);
    font-size: 38px;
    font-weight: 400;
    line-height: 1.2;
    margin-bottom: 12px;
}
.product-info .sku {
    font-size: 12px;
    color: var(--color-muted);
    letter-spacing: 1px;
    margin-bottom: 24px;
}
.product-info .price {
    font-size: 22px;
    font-weight: 400;
    margin-bottom: 30px;
    color: var(--color-black);
}
.product-info .short-desc {
    font-size: 15px;
    line-height: 1.7;
    color: var(--color-text);
    margin-bottom: 30px;
}
.product-meta {
    border-top: 1px solid var(--color-line);
    border-bottom: 1px solid var(--color-line);
    padding: 16px 0;
    margin-bottom: 30px;
}
.product-meta-row {
    display: flex;
    justify-content: space-between;
    padding: 6px 0;
    font-size: 13px;
}
.product-meta-row span:first-child { color: var(--color-muted); }
.quantity-row {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}
.quantity-row label {
    font-size: 13px;
    letter-spacing: 1px;
    text-transform: uppercase;
}
.quantity-input {
    display: inline-flex;
    border: 1px solid var(--color-line);
}
.quantity-input button {
    width: 38px;
    height: 38px;
    background: #fff;
    font-size: 16px;
    color: var(--color-black);
    transition: background var(--transition);
}
.quantity-input button:hover { background: var(--color-bg-alt); }
.quantity-input input {
    width: 50px;
    text-align: center;
    border: none;
    border-left: 1px solid var(--color-line);
    border-right: 1px solid var(--color-line);
    font-family: var(--font-sans);
    font-size: 15px;
    outline: none;
}
.btn-primary, .btn-secondary {
    display: inline-block;
    padding: 16px 32px;
    font-size: 13px;
    letter-spacing: 2px;
    text-transform: uppercase;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    border: 1px solid var(--color-black);
    transition: all var(--transition);
    font-family: var(--font-sans);
}
.btn-primary {
    background: var(--color-black);
    color: #fff;
    width: 100%;
}
.btn-primary:hover { background: var(--color-dark); opacity: 1; }
.btn-secondary {
    background: #fff;
    color: var(--color-black);
    width: 100%;
    margin-top: 12px;
}
.btn-secondary:hover { background: var(--color-bg-alt); opacity: 1; }

.product-tabs {
    margin-top: 60px;
}
.tabs-header {
    display: flex;
    border-bottom: 1px solid var(--color-line);
    margin-bottom: 24px;
    gap: 30px;
}
.tabs-header button {
    padding: 12px 0;
    font-size: 13px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--color-muted);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
}
.tabs-header button.active {
    color: var(--color-black);
    border-bottom-color: var(--color-black);
}
.tab-panel { display: none; font-size: 14px; line-height: 1.8; }
.tab-panel.active { display: block; }

/* ============================================================
   CART PAGE
   ============================================================ */
.cart-page {
    padding: 60px;
    max-width: 1400px;
    margin: 0 auto;
}
.cart-title {
    font-family: var(--font-serif);
    font-size: 42px;
    font-weight: 400;
    margin-bottom: 40px;
}
.cart-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
}
.cart-items { }
.cart-row {
    display: grid;
    grid-template-columns: 130px 1fr auto;
    gap: 24px;
    padding: 24px 0;
    border-bottom: 1px solid var(--color-line);
    align-items: center;
}
.cart-item-image {
    background: var(--color-bg-soft);
    aspect-ratio: 1 / 1;
    padding: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.cart-item-image img { max-width: 100%; max-height: 100%; object-fit: contain; }
.cart-item-name {
    font-size: 16px;
    margin-bottom: 6px;
    color: var(--color-black);
}
.cart-item-meta {
    font-size: 13px;
    color: var(--color-muted);
    margin-bottom: 12px;
}
.cart-item-controls {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}
.cart-item-remove {
    font-size: 12px;
    color: var(--color-muted);
    text-decoration: underline;
    background: none;
    border: none;
    cursor: pointer;
    font-family: var(--font-sans);
}
.cart-item-price {
    font-size: 16px;
    font-weight: 500;
    text-align: right;
}

.cart-summary {
    background: var(--color-bg-soft);
    padding: 36px;
    align-self: start;
    position: sticky;
    top: calc(var(--header-height) + 20px);
}
.cart-summary h3 {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 400;
    margin-bottom: 24px;
}
.summary-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    font-size: 14px;
}
.summary-row.total {
    border-top: 1px solid var(--color-line);
    margin-top: 14px;
    padding-top: 18px;
    font-size: 18px;
    font-weight: 500;
}
.cart-empty {
    text-align: center;
    padding: 100px 20px;
}
.cart-empty h2 {
    font-family: var(--font-serif);
    font-size: 32px;
    font-weight: 400;
    margin-bottom: 14px;
}
.cart-empty p { color: var(--color-muted); margin-bottom: 30px; }

/* Toast / success message */
.flash-message {
    position: fixed;
    top: 20px; right: 20px;
    background: var(--color-black);
    color: #fff;
    padding: 14px 22px;
    font-size: 13px;
    letter-spacing: 1px;
    z-index: 1000;
    animation: slideIn 0.3s ease, fadeOut 0.3s ease 2.7s forwards;
}
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes fadeOut { to { opacity: 0; transform: translateX(100%); } }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
    .new-arrivals-grid { grid-template-columns: 1fr; }
    .new-arrivals-image { display: none; }
    .products-grid { grid-template-columns: repeat(3, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; padding: 0 32px 40px; }
    .footer-promo { grid-column: 1 / -1; max-width: 280px; }
    .product-details { grid-template-columns: 1fr; gap: 30px; padding: 30px; }
    .cart-layout { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .menu-toggle { display: inline-flex; }
    .main-nav { display: none; }
    .header-inner { padding: 14px 20px; }
    .brand-logo { font-size: 22px; letter-spacing: 4px; }
    .hero-content { padding: 30px 24px; }
    .new-arrivals-content { padding: 40px 24px; }
    .products-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; padding: 30px 20px 60px; }
    .creations-grid { grid-template-columns: 1fr; gap: 16px; }
    .feature-banner-content { padding: 30px 24px; }
    .section { padding: 50px 0; }
    .section-header, .page-header, .products-toolbar, .cart-page, .footer-bottom-inner {
        padding-left: 24px; padding-right: 24px;
    }
    .container { padding: 0 24px; }
    .cart-row { grid-template-columns: 80px 1fr; }
    .cart-item-price { grid-column: 2; text-align: left; }
    .carousel-arrow { display: none; }
}

@media (max-width: 480px) {
    .products-grid { grid-template-columns: 1fr; }
    .product-card { width: 100%; }
}