:root {
  --vk-blue: #1378b8;
  --vk-blue-dark: #0c4f82;
  --vk-cyan: #48bfe3;
  --vk-orange: #f28b2c;
  --vk-bg: #f5f9fc;
  --vk-card: #ffffff;
  --vk-text: #143047;
  --vk-muted: #63798b;
  --vk-line: #dbe8f1;
  --vk-soft: #eef8fd;
  --vk-shadow: 0 18px 50px rgba(12, 79, 130, .12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  font-family: Arial, sans-serif;
  color: var(--vk-text);
  background:
    radial-gradient(circle at top left, rgba(72,191,227,.22), transparent 34rem),
    linear-gradient(180deg, #ffffff 0%, var(--vk-bg) 42%, #eef6fb 100%);
}

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

.vk-header {
  width: 100%;
  min-height: 76px;
  padding: 14px clamp(16px, 3vw, 44px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  background: rgba(255,255,255,.9);
  border-bottom: 1px solid rgba(219,232,241,.9);
  backdrop-filter: blur(14px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.vk-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.vk-logo-mark {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  font-weight: 900;
  color: #fff;
  background: linear-gradient(135deg, var(--vk-blue), var(--vk-cyan));
  border-radius: 14px;
  box-shadow: var(--vk-shadow);
}

.vk-logo strong {
  display: block;
  font-size: 18px;
}

.vk-logo small {
  display: block;
  color: var(--vk-muted);
  margin-top: 2px;
}

.vk-top-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.vk-top-nav a,
.vk-bottom-nav a {
  padding: 10px 14px;
  border-radius: 14px;
  color: var(--vk-muted);
  font-weight: 800;
}

.vk-top-nav a[aria-current="page"],
.vk-bottom-nav a[aria-current="page"] {
  color: #fff;
  background: linear-gradient(135deg, var(--vk-blue), var(--vk-blue-dark));
}

.vk-main {
  width: 100%;
  padding: 28px clamp(16px, 3vw, 44px) 96px;
}

.vk-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, .8fr);
  gap: 24px;
  align-items: stretch;
  padding: clamp(24px, 5vw, 54px);
  border: 1px solid rgba(219,232,241,.9);
  background: linear-gradient(135deg, rgba(255,255,255,.96), rgba(229,247,255,.9));
  box-shadow: var(--vk-shadow);
  border-radius: 26px;
}

.vk-kicker {
  margin: 0 0 10px;
  color: var(--vk-orange);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .08em;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.08;
  color: #0f2b42;
}

h1 {
  max-width: 980px;
  font-size: clamp(34px, 5vw, 68px);
}

h2 {
  font-size: clamp(26px, 3vw, 42px);
}

h3 {
  font-size: 22px;
}

.vk-lead {
  max-width: 760px;
  margin: 18px 0 0;
  color: var(--vk-muted);
  font-size: 18px;
  line-height: 1.6;
}

.vk-search {
  align-self: center;
  padding: 20px;
  background: #fff;
  border: 1px solid var(--vk-line);
  border-radius: 22px;
}

.vk-search label {
  display: block;
  margin-bottom: 10px;
  color: var(--vk-blue-dark);
  font-weight: 900;
}

.vk-search div {
  display: flex;
  gap: 10px;
}

.vk-search input {
  flex: 1;
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--vk-line);
  border-radius: 14px;
  font: inherit;
}

.vk-search button,
.vk-light-btn,
.vk-primary-link {
  border: 0;
  border-radius: 14px;
  padding: 12px 18px;
  font: inherit;
  font-weight: 900;
  cursor: pointer;
}

.vk-search button,
.vk-primary-link {
  color: #fff;
  background: linear-gradient(135deg, var(--vk-orange), #ffad52);
}

.vk-light-btn {
  color: var(--vk-blue-dark);
  background: var(--vk-soft);
  border: 1px solid var(--vk-line);
}

.vk-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 20px;
}

.vk-stats div,
.vk-section {
  background: var(--vk-card);
  border: 1px solid var(--vk-line);
  box-shadow: var(--vk-shadow);
  border-radius: 22px;
}

.vk-stats div {
  padding: 22px;
}

.vk-stats strong {
  display: block;
  font-size: 34px;
  color: var(--vk-blue-dark);
}

.vk-stats span {
  color: var(--vk-muted);
  font-weight: 800;
}

.vk-section {
  margin-top: 22px;
  padding: clamp(18px, 3vw, 30px);
}

.vk-section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.vk-category-grid,
.vk-product-grid {
  display: grid;
  gap: 14px;
}

.vk-category-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.vk-product-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.vk-category-card,
.vk-product-card,
.vk-empty {
  min-height: 130px;
  padding: 18px;
  border: 1px solid var(--vk-line);
  border-radius: 18px;
  background: linear-gradient(180deg, #fff, #f8fcff);
}

.vk-category-card strong,
.vk-product-card strong {
  display: block;
  margin-bottom: 8px;
  color: var(--vk-blue-dark);
}

.vk-product-card span,
.vk-category-card span,
.vk-empty,
.vk-muted {
  color: var(--vk-muted);
}

.vk-product-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.vk-product-thumb {
  width: 100%;
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: 16px;
  background: linear-gradient(135deg, #e8f6fd, #ffffff);
  border: 1px solid var(--vk-line);
  color: var(--vk-blue-dark);
  font-weight: 900;
}

.vk-product-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.vk-price {
  color: var(--vk-orange);
  font-weight: 900;
  font-size: 18px;
}

.vk-detail {
  max-width: 1320px;
  margin-left: auto;
  margin-right: auto;
}

.vk-detail-grid {
  display: grid;
  grid-template-columns: minmax(280px, .85fr) minmax(0, 1.15fr);
  gap: 26px;
  align-items: start;
}

.vk-detail-image {
  min-height: 320px;
  display: grid;
  place-items: center;
  border-radius: 22px;
  border: 1px solid var(--vk-line);
  background: linear-gradient(135deg, #e8f6fd, #fff);
  color: var(--vk-blue-dark);
  font-weight: 900;
}

.vk-detail-image img {
  width: 100%;
  height: 100%;
  max-height: 520px;
  object-fit: contain;
}

.vk-detail-info {
  display: grid;
  gap: 16px;
}

.vk-crumbs {
  margin-bottom: 16px;
  color: var(--vk-muted);
  font-weight: 800;
}

.vk-crumbs a {
  color: var(--vk-blue-dark);
}

.vk-spec-list {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.vk-spec-item {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--vk-line);
}

.vk-bottom-nav {
  display: none;
}

@media (max-width: 980px) {
  .vk-hero,
  .vk-detail-grid {
    grid-template-columns: 1fr;
  }

  .vk-category-grid,
  .vk-product-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .vk-top-nav {
    display: none;
  }

  .vk-header {
    min-height: 70px;
  }

  .vk-logo small {
    display: none;
  }

  .vk-main {
    padding: 18px 14px 92px;
  }

  .vk-hero {
    padding: 22px;
    border-radius: 22px;
  }

  .vk-search div {
    display: grid;
  }

  .vk-stats {
    grid-template-columns: 1fr;
  }

  .vk-category-grid,
  .vk-product-grid {
    grid-template-columns: 1fr;
  }

  .vk-section-head {
    display: grid;
    align-items: start;
  }

  .vk-bottom-nav {
    position: fixed;
    left: 10px;
    right: 10px;
    bottom: 10px;
    z-index: 50;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    padding: 8px;
    border: 1px solid rgba(219,232,241,.95);
    border-radius: 20px;
    background: rgba(255,255,255,.94);
    box-shadow: 0 18px 55px rgba(12,79,130,.18);
    backdrop-filter: blur(14px);
  }

  .vk-bottom-nav a {
    text-align: center;
    font-size: 13px;
    padding: 12px 8px;
  }
}