:root {
    --primary: #1a73e8;
    --text: #0f172a;
    --muted: #475569;
    --bg: #f8fafc;
    --card: #ffffff;
    --border: #e2e8f0;
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
}

.site-header {
    background: #fff;
    box-shadow: 0 4px 20px rgba(15, 23, 42, 0.05);
    position: sticky;
    top: 0;
    z-index: 20;
}

.announcement-bar {
    background: #000;
    color: #fff;
    text-align: center;
    font-size: 0.85rem;
    padding: 0.35rem 1rem;
    letter-spacing: 0.02em;
}

.announcement-bar p {
    margin: 0;
}

.main-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem clamp(1rem, 4vw, 4rem);
    gap: 1.5rem;
}

.logo {
    font-weight: 800;
    font-size: 1.3rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.main-menu {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    flex: 1;
}

.main-menu a {
    color: var(--text);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.04em;
}

.nav-actions {
    display: flex;
    gap: 0.5rem;
}

.icon-button {
    border: 1px solid var(--border);
    background: #fff;
    width: 40px;
    height: 40px;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text);
}

.icon-button--cart {
    width: auto;
    padding: 0 0.75rem;
    gap: 0.35rem;
    text-decoration: none;
}

.cart-count {
    background: var(--primary);
    color: #fff;
    border-radius: 999px;
    padding: 0.15rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
}

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

a:hover {
    text-decoration: underline;
}

.hero {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    padding: 3rem clamp(1rem, 4vw, 3.5rem);
    gap: 1.5rem;
    background: radial-gradient(circle at top right, rgba(26, 115, 232, 0.2), transparent), #0f172a;
    color: #fff;
}

.hero__content h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    margin: 0;
}

.hero__content p {
    font-size: 1.1rem;
    color: #cbd5f5;
}

.badge {
    display: inline-flex;
    background: rgba(255, 255, 255, 0.1);
    padding: 0.3rem 0.7rem;
    border-radius: 999px;
    font-size: 0.85rem;
}

.hero__actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.hero__visual {
    min-height: 320px;
    border-radius: 1.5rem;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), rgba(15, 23, 42, 0.1)),
        url('https://images.unsplash.com/photo-1512436991641-6745cdb1723f?auto=format&fit=crop&w=800&q=80') center/cover;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.3);
}

.hero--banner {
    padding: 0;
    background: transparent;
}

.hero--banner img {
    width: 100%;
    display: block;
    border-radius: 0;
    max-height: 520px;
    object-fit: cover;
}

.hero--split {
    align-items: stretch;
}

.hero__visual--collage {
    background: transparent;
    box-shadow: none;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.hero-card {
    border-radius: 1.25rem;
    padding: 1rem;
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    min-height: 150px;
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.25);
}

.hero-card strong {
    font-size: 1.1rem;
}

.hero-card--tall {
    grid-row: span 2;
    background: linear-gradient(135deg, #f9a825, #f57f17);
}

.hero-card--primary {
    background: linear-gradient(135deg, #2563eb, #7c3aed);
}

.hero-card--accent {
    background: linear-gradient(135deg, #f43f5e, #fb7185);
}

.btn {
    border: none;
    border-radius: 999px;
    padding: 0.75rem 1.2rem;
    background: var(--primary);
    color: #fff;
    font-weight: 600;
    cursor: pointer;
}

.btn--ghost {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.4);
    color: inherit;
}

.btn--outline {
    background: transparent;
    border: 1px solid var(--primary);
    color: var(--primary);
}

.search {
    display: flex;
    gap: 0.5rem;
    margin: 1rem 0;
}

.search input {
    flex: 1;
    padding: 0.7rem;
    border-radius: 0.6rem;
    border: none;
}

main {
    padding: clamp(1rem, 4vw, 3rem);
}

.section-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.categories__grid {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 1rem;
}

.category {
    position: relative;
    padding: 0;
    border-radius: 1.25rem;
    overflow: hidden;
    min-height: 160px;
    display: flex;
    border: 1px solid var(--border);
    text-decoration: none;
}

.category__media {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    filter: brightness(0.7);
}

.category__content {
    position: relative;
    z-index: 1;
    padding: 1.2rem;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    width: 100%;
    gap: 0.2rem;
    color: #fff;
    text-shadow: 0 8px 16px rgba(15, 23, 42, 0.4);
}

.category__content span {
    font-size: 0.9rem;
    opacity: 0.95;
}

@media (max-width: 1200px) {
    .categories__grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .main-menu {
        justify-content: flex-start;
    }
}

@media (max-width: 640px) {
    .categories__grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .main-nav {
        flex-direction: column;
        align-items: flex-start;
    }

    .main-menu {
        justify-content: flex-start;
    }

    .nav-actions {
        align-self: stretch;
    }

    .hero__visual--collage {
        grid-template-columns: 1fr;
    }
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.product form {
    background: var(--card);
    border-radius: 1.25rem;
    border: 1px solid var(--border);
    padding: 0.85rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    height: 100%;
}

.product img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    border-radius: 1rem;
}

.product__media {
    display: block;
}

.product__title {
    color: var(--text);
}

.product__title:hover {
    color: var(--primary);
    text-decoration: none;
}

.product__footer {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.filter-toggle {
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0.5rem 1rem;
    background: transparent;
    cursor: pointer;
}

.product__footer input {
    width: 4rem;
    padding: 0.4rem;
}

.product__meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.product__meta strong {
    font-size: 1.1rem;
}

.product__actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.5rem;
}

.product__actions .btn {
    padding: 0.6rem 1rem;
    border-radius: 999px;
    width: 100%;
}

.product__actions .btn--outline {
    border: 1px solid var(--primary);
    color: var(--primary);
    background: transparent;
}

.product__actions .btn:not(.btn--outline) {
    background: var(--primary);
    color: #fff;
}

.alert {
    margin: 0.75rem 0;
    padding: 0.85rem;
    border-radius: 0.75rem;
    background: #e0ecff;
    color: #0f172a;
}

.empty {
    padding: 1.1rem;
    border-radius: 1rem;
    background: var(--card);
    border: 1px dashed var(--border);
}

.alert--success {
    background: #dcfce7;
}

.alert--error {
    background: #fee2e2;
}

.top-nav {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem clamp(1rem, 4vw, 3rem);
    background: var(--card);
    border-bottom: 1px solid var(--border);
    align-items: center;
}

.logo {
    font-weight: 700;
    font-size: 1.3rem;
}

.cart-page,
.checkout {
    padding: clamp(1rem, 4vw, 3rem);
}

.cart-page table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card);
    border-radius: 1rem;
    overflow: hidden;
}

.cart-page th,
.cart-page td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.cart-item {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.cart-item img {
    width: 64px;
    height: 64px;
    object-fit: cover;
    border-radius: 0.5rem;
}

.cart-actions,
.cart-summary {
    margin-top: 0.75rem;
    display: flex;
    gap: 1rem;
}

.cart-summary {
    flex-direction: column;
    align-items: flex-end;
    background: var(--card);
    padding: 1.1rem;
    border-radius: 0.9rem;
    border: 1px solid var(--border);
}

.checkout__grid {
    display: grid;
    grid-template-columns: minmax(280px, 2fr) minmax(240px, 1fr);
    gap: 2rem;
}

.card {
    background: var(--card);
    border-radius: 0.9rem;
    padding: 1.1rem;
    border: 1px solid var(--border);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0.75rem;
}

label {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    font-size: 0.95rem;
}

input,
select,
button,
textarea {
    font: inherit;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
textarea {
    padding: 0.65rem;
    border-radius: 0.65rem;
    border: 1px solid var(--border);
}

small {
    color: #dc2626;
}

.site-footer {
    padding: 1.5rem clamp(1rem, 4vw, 3rem);
    background: #0f172a;
    color: #94a3b8;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.mini-cart {
    list-style: none;
    padding: 0;
    margin: 0 0 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.mini-cart li {
    display: flex;
    justify-content: space-between;
}

.totals {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.totals--grand {
    border-top: 1px solid var(--border);
    padding-top: 0.75rem;
    margin-top: 0.75rem;
}

.radio {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    margin-bottom: 0.5rem;
}

.link {
    background: none;
    border: none;
    color: var(--primary);
    cursor: pointer;
}

.footer-links {
    display: flex;
    gap: 1rem;
}

.footer-links a {
    color: #fff;
}

.product-page {
    padding: clamp(1rem, 4vw, 3rem);
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.product-detail {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    grid-template-areas:
        "media info"
        "description info";
    gap: 1.75rem;
    background: var(--card);
    border-radius: 1.5rem;
    padding: clamp(1rem, 3vw, 2.2rem);
    border: 1px solid var(--border);
}

.product-detail__media {
    grid-area: media;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.product-detail__media img {
    width: 100%;
    border-radius: 1.25rem;
    object-fit: cover;
    max-height: 460px;
}

.product-detail__info {
    grid-area: info;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.product-detail__info form {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    align-items: center;
}

.product-detail__info input[type="number"] {
    width: 80px;
}

.product-detail__actions {
    display: flex;
    gap: 0.75rem;
    flex: 1;
    flex-wrap: wrap;
}

.product-detail__actions .btn {
    flex: 1;
    text-align: center;
}

.product-price {
    font-size: 2rem;
    font-weight: 700;
}

.product-brand {
    color: var(--muted);
    margin: 0;
}

.product-description {
    line-height: 1.6;
    color: var(--muted);
}

.product-detail__description {
    grid-area: description;
}

@media (max-width: 640px) {
    .product-detail {
        grid-template-columns: 1fr;
        grid-template-areas:
            "media"
            "info"
            "description";
    }
}

.related .product-grid {
    margin-top: 1rem;
}

@media (max-width: 1100px) {
    .product-grid {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    }
}

@media (max-width: 768px) {
    .hero__actions {
        flex-direction: column;
        align-items: stretch;
    }

    .product__footer {
        flex-direction: column;
        align-items: flex-start;
    }

    .cart-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .checkout__grid {
        grid-template-columns: 1fr;
    }
}