:root {
    --green: #335f43;
    --light-green: #edf4ee;
    --text: #253128;
    --border: #d7e2d8;
    --white: #ffffff;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    color: var(--text);
    background: var(--white);
    font-family: "Segoe UI", Arial, Helvetica, sans-serif;
}

.page-shell {
    width: min(1200px, 100%);
    margin: 0 auto;
    padding: clamp(1.25rem, 3vw, 2.5rem) 1.5rem;
}

.page-title {
    margin: 0 0 1.5rem;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    text-align: center;
}

.page-layout {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 2rem;
    align-items: start;
}

.category-sidebar {
    padding: 1.25rem;
    background: var(--light-green);
    border: 1px solid var(--border);
    border-radius: 6px;
}

.category-sidebar h2 {
    margin: 0 0 0.8rem;
    font-size: 1.1rem;
}

.category-sidebar ul {
    display: grid;
    gap: 0.65rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.category-sidebar a,
.product-link {
    color: var(--green);
    font-weight: 700;
    text-decoration: none;
}

.category-sidebar a:hover,
.category-sidebar a:focus,
.product-link:hover,
.product-link:focus { text-decoration: underline; }

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
}

.product-card {
    min-width: 0;
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--white);
}

.product-image {
    display: block;
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: contain;
    margin-bottom: 0.9rem;
    background: var(--light-green);
}

.product-card h2 {
    margin: 0;
    font-size: 1.1rem;
}

.product-card p { line-height: 1.5; }

.empty-catalog {
    grid-column: 1 / -1;
    margin: 0;
    padding: 1.25rem;
    background: var(--light-green);
    border-radius: 6px;
    line-height: 1.5;
}

.site-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border);
}

.site-footer__content {
    display: grid;
    gap: 0.75rem;
    width: min(100%, 42rem);
    margin: 0 auto;
}

.site-footer p { margin: 0; }

@media (max-width: 850px) {
    .page-layout { grid-template-columns: 190px minmax(0, 1fr); gap: 1.25rem; }
    .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 600px) {
    .page-shell { padding-inline: 1rem; }
    .page-layout { grid-template-columns: 1fr; }
    .category-sidebar { padding: 1rem; }
    .category-sidebar ul { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .product-grid { grid-template-columns: 1fr; }
}