:root {
  --bg: #ffffff;
  --surface: #f6f7f9;
  --border: #e3e6ea;
  --text: #14181f;
  --muted: #59616c;
  --accent: #b3123c;
  --accent-soft: #fdeef2;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.06), 0 8px 24px rgba(16, 24, 40, 0.05);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* Header ---------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.site-header__inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 650;
  letter-spacing: -0.01em;
  flex: 0 0 auto;
}

.brand__mark {
  width: 22px;
  height: 22px;
  border-radius: 7px;
  background: var(--accent);
  display: inline-block;
}

.brand__name {
  font-size: 17px;
}

.search {
  flex: 1 1 320px;
  display: flex;
  gap: 8px;
  min-width: 0;
}

.search__input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font: inherit;
  background: var(--surface);
}

.search__input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  background: #fff;
}

.search__button,
.button {
  padding: 10px 18px;
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.search__button:hover,
.button:hover {
  filter: brightness(1.08);
}

.button[disabled] {
  opacity: 0.5;
  cursor: default;
}

/* Layout ---------------------------------------------------------------- */

.layout {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px 20px 64px;
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.layout--product {
  grid-template-columns: minmax(0, 1fr);
}

/* Filters --------------------------------------------------------------- */

.filters {
  position: sticky;
  top: 76px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  background: var(--surface);
}

.filters__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.filters__title {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin: 0;
}

.filter-block__title {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin: 0 0 6px;
  display: block;
}

.filters__toggle {
  display: none;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 8px;
  padding: 6px 10px;
  font: inherit;
  cursor: pointer;
}

.cat-tree,
.cat-tree ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.cat-tree ul {
  margin-left: 12px;
  border-left: 1px solid var(--border);
  padding-left: 10px;
}

.cat-tree button {
  display: flex;
  width: 100%;
  gap: 8px;
  align-items: baseline;
  justify-content: space-between;
  background: none;
  border: 0;
  padding: 5px 6px;
  border-radius: 8px;
  font: inherit;
  text-align: left;
  color: var(--text);
  cursor: pointer;
}

.cat-tree button:hover {
  background: #fff;
}

.cat-tree button[aria-current="true"] {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}

.cat-tree .count {
  color: var(--muted);
  font-size: 12px;
}

.cat-tree__more {
  cursor: pointer;
  font-size: 12px;
  color: var(--muted);
  padding: 4px 6px;
  list-style: none;
}

.cat-tree__more::-webkit-details-marker {
  display: none;
}

.cat-tree__more:hover {
  color: var(--accent);
}

.filter-block {
  margin-top: 18px;
}

.select {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  font: inherit;
}

.checkbox {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 14px;
  color: var(--muted);
  cursor: pointer;
}

/* Results --------------------------------------------------------------- */

.results__head {
  display: flex;
  gap: 16px;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.results__title {
  margin: 0;
  font-size: 24px;
  letter-spacing: -0.02em;
}

.results__meta {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.sort {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sort__label {
  color: var(--muted);
  font-size: 13px;
}

.sort .select {
  width: auto;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 13px;
  font-weight: 600;
}

.chip button {
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  cursor: pointer;
  padding: 0;
  line-height: 1;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 18px;
}

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.card__media {
  aspect-ratio: 1 / 1;
  background: var(--surface);
  display: grid;
  place-items: center;
  overflow: hidden;
}

.card__media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 12px;
}

.card__placeholder {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  color: var(--muted);
  font-size: 13px;
}

.card__body {
  padding: 12px 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.card__brand {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.card__title {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.35;
  margin: 0;
}

.card__title a:hover {
  color: var(--accent);
}

/* Focus is always visible, on every interactive element. */
a:focus-visible,
button:focus-visible,
select:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.card__price {
  margin-top: auto;
  padding-top: 8px;
  font-weight: 650;
}

.card__score {
  font-size: 12px;
  color: var(--muted);
}

.empty {
  color: var(--muted);
  padding: 40px 0;
}

.load-more {
  display: flex;
  justify-content: center;
  margin-top: 28px;
}

/* Product --------------------------------------------------------------- */

.breadcrumb {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.breadcrumb a:hover {
  color: var(--accent);
}

.product__top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.product__media {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 24px;
}

.product__media img {
  width: 100%;
  object-fit: contain;
}

.product__brand {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 13px;
}

.product__title {
  margin: 6px 0 10px;
  font-size: 28px;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.product__price {
  font-size: 24px;
  font-weight: 700;
}

.product__stock {
  font-size: 14px;
  color: var(--muted);
  margin-top: 4px;
}

.product__description {
  margin: 18px 0 0;
  white-space: pre-line;
  color: #333a45;
}

.product__link {
  display: inline-block;
  margin-top: 14px;
  color: var(--accent);
  font-weight: 600;
  font-size: 14px;
}

.specs {
  margin-top: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.specs h2 {
  font-size: 15px;
  margin: 0;
  padding: 12px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.specs dl {
  margin: 0;
  display: grid;
  grid-template-columns: minmax(120px, 220px) minmax(0, 1fr);
}

.specs dt,
.specs dd {
  margin: 0;
  padding: 9px 16px;
  border-bottom: 1px solid var(--border);
}

.specs dt {
  color: var(--muted);
  font-size: 14px;
}

.specs dd {
  font-weight: 500;
}

.section-title {
  margin: 40px 0 14px;
  font-size: 19px;
  letter-spacing: -0.01em;
}

/* Footer ---------------------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 20px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

.site-footer code {
  background: var(--surface);
  padding: 1px 6px;
  border-radius: 6px;
}

/* Responsive ------------------------------------------------------------ */

@media (max-width: 900px) {
  .layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .filters {
    position: static;
    padding: 12px;
  }

  .filters__toggle {
    display: inline-block;
  }

  .filters__body {
    display: none;
    margin-top: 12px;
  }

  .filters__body.is-open {
    display: block;
  }

  .filters__title {
    display: none;
  }

  .product__top {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 560px) {
  .site-header__inner {
    padding: 10px 14px;
  }

  .search {
    order: 3;
    flex-basis: 100%;
  }

  .layout {
    padding: 16px 14px 48px;
  }

  .grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 12px;
  }

  .card__title {
    font-size: 14px;
  }

  .product__title {
    font-size: 22px;
  }

  .specs dl {
    grid-template-columns: minmax(0, 1fr);
  }

  .specs dt {
    padding-bottom: 0;
    border-bottom: 0;
  }

  .specs dd {
    padding-top: 2px;
  }
}