:root {
  color-scheme: light;
  --bg: #f4f6f8;
  --panel: #ffffff;
  --text: #111827;
  --muted: #667085;
  --line: #d8dee8;
  --primary: #0f766e;
  --primary-soft: #e7f4f1;
  --ink-soft: #263241;
  --accent: #b45309;
  --shadow: 0 18px 44px rgba(17, 24, 39, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(180deg, #eef3f6 0, #f4f6f8 320px, #f4f6f8 100%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button, input {
  font: inherit;
}

body.modal-open {
  overflow: hidden;
}

#app {
  width: min(1360px, calc(100vw - 40px));
  margin: 0 auto;
  padding: 18px 0 40px;
}

.page-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 420px);
  gap: 20px;
  align-items: end;
  padding: 14px 0 18px;
}

.eyebrow {
  display: inline-flex;
  margin-bottom: 6px;
  color: var(--primary);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
}

.headline h1 {
  margin: 0;
  font-size: 30px;
  line-height: 1.12;
  letter-spacing: 0;
}

.headline p {
  max-width: 660px;
  margin: 8px 0 0;
  color: #475467;
  font-size: 16px;
  line-height: 1.65;
}

.head-tools {
  display: grid;
  gap: 10px;
}

.search-box input {
  width: 100%;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  padding: 0 14px;
  box-shadow: 0 12px 32px rgba(17, 24, 39, 0.06);
}

.search-box input:focus {
  border-color: var(--primary);
  outline: 3px solid rgba(15, 118, 110, 0.12);
}

.catalog-layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

.mobile-category-filter {
  display: none;
}

.category-panel {
  position: sticky;
  top: 18px;
  display: grid;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.86);
  padding: 14px;
  box-shadow: var(--shadow);
}

.panel-title {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.panel-title strong {
  font-size: 15px;
}

.panel-title span,
.empty-small {
  color: var(--muted);
  font-size: 12px;
}

.category-nav {
  display: grid;
  gap: 5px;
}

.category-nav-node {
  position: relative;
  margin-left: calc(var(--depth, 0) * 14px);
}

.category-nav button {
  position: relative;
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
  width: 100%;
  min-height: 42px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: #ffffff;
  color: var(--ink-soft);
  padding: 8px 10px;
  text-align: left;
  cursor: pointer;
}

.category-nav button::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  bottom: 9px;
  width: 3px;
  border-radius: 999px;
  background: #0f766e;
}

.tree-toggle {
  display: inline-grid;
  place-items: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #edf3f2;
  color: var(--muted);
  font-weight: 800;
  line-height: 1;
}

.tree-toggle.empty {
  background: transparent;
}

.category-nav-node.depth-0 button {
  background: #ffffff;
}

.category-nav-node.depth-1 button {
  background: #f7fbf9;
}

.category-nav-node.depth-2 button {
  background: #fbfaf5;
}

.category-nav-node.depth-3 button {
  background: #fbf8f8;
}

.category-nav-node.depth-4 button,
.category-nav-node.depth-5 button {
  background: #faf9fd;
}

.category-nav-node.depth-1 button {
  color: #14532d;
}

.category-nav-node.depth-2 button {
  color: #7c2d12;
}

.category-nav-node.depth-3 button {
  color: #7f1d1d;
}

.category-nav-node.depth-4 button {
  color: #4c1d95;
}

.category-nav-node.depth-5 button {
  color: #164e63;
}

.category-nav-node.depth-1 button::before {
  background: #16a34a;
}

.category-nav-node.depth-2 button::before {
  background: #f59e0b;
}

.category-nav-node.depth-3 button::before {
  background: #dc2626;
}

.category-nav-node.depth-4 button::before {
  background: #7c3aed;
}

.category-nav-node.depth-5 button::before {
  background: #0891b2;
}

.category-nav button:hover {
  border-color: rgba(15, 118, 110, 0.18);
  background: #f6faf9;
}

.category-nav button.active {
  border-color: rgba(15, 118, 110, 0.28);
  background: var(--primary-soft);
  color: var(--primary);
}

.all-category-button {
  margin-bottom: 4px;
}

.category-nav strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 14px;
}

.category-nav span {
  color: var(--muted);
  font-size: 12px;
}

.catalog-list {
  min-width: 0;
}

.category-section {
  display: grid;
  gap: 16px;
}

.category-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  border-bottom: 1px solid var(--line);
  padding-bottom: 16px;
}

.category-head span {
  color: var(--primary);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
}

.category-head h2 {
  margin: 4px 0 6px;
  font-size: 28px;
  line-height: 1.2;
}

.category-head p {
  margin: 0;
  max-width: 720px;
  color: var(--muted);
  line-height: 1.6;
}

.child-category-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.child-category-links button {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--ink-soft);
  padding: 7px 11px;
  cursor: pointer;
}

.child-category-links button:hover {
  border-color: rgba(15, 118, 110, 0.32);
  background: var(--primary-soft);
  color: var(--primary);
}

.item-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

.catalog-pagination {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  align-items: center;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.catalog-pagination span {
  color: var(--muted);
  font-size: 13px;
}

.catalog-pagination button {
  min-width: 82px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink-soft);
  padding: 8px 12px;
  cursor: pointer;
  font-weight: 700;
}

.catalog-pagination button:disabled {
  cursor: not-allowed;
  opacity: 0.46;
}

.catalog-card {
  overflow: hidden;
  display: grid;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 12px 28px rgba(17, 24, 39, 0.06);
}

.product-media {
  position: relative;
  height: 138px;
  background: #e9eef3;
  overflow: hidden;
}

.product-media-button,
.product-media img {
  width: 100%;
  height: 100%;
}

.product-media-button {
  position: relative;
  display: block;
  border: 0;
  background: transparent;
  padding: 0;
  cursor: zoom-in;
}

.product-media-button img {
  object-fit: cover;
  display: block;
}

.image-count-chip {
  position: absolute;
  top: 10px;
  right: 10px;
  border-radius: 999px;
  background: rgba(17, 24, 39, 0.76);
  color: #fff;
  padding: 5px 9px;
  font-size: 12px;
  font-weight: 800;
}

.product-media.empty {
  display: grid;
  place-items: center;
  background:
    linear-gradient(135deg, rgba(15, 118, 110, 0.16), rgba(180, 83, 9, 0.12)),
    #edf2f6;
}

.media-placeholder {
  display: grid;
  place-items: center;
  width: 82px;
  height: 64px;
  width: 64px;
  border: 1px solid rgba(15, 118, 110, 0.2);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.72);
  color: var(--primary);
  font-size: 20px;
  font-weight: 800;
}

.category-chip {
  position: absolute;
  left: 12px;
  bottom: 12px;
  max-width: calc(100% - 24px);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  border-radius: 999px;
  background: rgba(17, 24, 39, 0.76);
  color: #fff;
  padding: 5px 10px;
  font-size: 12px;
}

.card-body {
  display: grid;
  gap: 10px;
  padding: 12px;
}

.card-title {
  display: grid;
  gap: 6px;
}

.card-title h3 {
  margin: 0;
  font-size: 16px;
  line-height: 1.35;
}

.card-title span {
  color: var(--muted);
  font-size: 12px;
}

.summary {
  margin: 0;
  color: #344054;
  line-height: 1.65;
}

.keywords,
.note {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.spec-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 0;
}

.spec-list div {
  min-height: 48px;
  border: 1px solid #edf1f5;
  border-radius: 8px;
  background: #fbfcfd;
  padding: 9px;
}

.spec-list dt {
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 12px;
}

.spec-list dd {
  margin: 0;
  color: var(--text);
  font-size: 13px;
  line-height: 1.45;
  word-break: break-word;
}

.contact-box {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.contact-summary {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.contact-summary div {
  display: grid;
  gap: 3px;
}

.contact-summary span,
.method-group-head span {
  color: var(--muted);
  font-size: 12px;
}

.contact-summary strong {
  font-size: 15px;
}

.contact-summary em {
  color: var(--primary);
  font-size: 12px;
  font-style: normal;
  font-weight: 700;
}

.contact-summary p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.contact-toggle {
  border: 1px solid rgba(15, 118, 110, 0.25);
  border-radius: 8px;
  background: var(--primary-soft);
  color: var(--primary);
  padding: 8px 10px;
  cursor: pointer;
  font-weight: 800;
}

.method-groups {
  grid-column: 1 / -1;
  display: grid;
  gap: 8px;
}

.method-group {
  display: grid;
  gap: 8px;
  border: 1px solid #e6edf3;
  border-radius: 8px;
  background: #fbfcfd;
  padding: 8px;
}

.method-group-head {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--text);
  padding: 0;
  text-align: left;
  font-weight: 800;
}

.method-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.method-item {
  display: grid;
  gap: 6px;
  min-width: 104px;
  border: 1px solid #edf1f5;
  border-radius: 8px;
  background: #fff;
  padding: 8px;
}

.method-item strong {
  font-size: 13px;
  word-break: break-all;
}

.method-item img {
  width: 86px;
  height: 86px;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--line);
}

.image-viewer {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: 24px;
  pointer-events: none;
}

.image-viewer.hidden {
  display: none;
}

.image-viewer-backdrop {
  position: absolute;
  inset: 0;
  border: 0;
  background: rgba(3, 7, 18, 0.38);
  pointer-events: auto;
}

.image-viewer-stage {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 12px;
  justify-items: center;
  margin: 0;
  max-width: min(980px, calc(100vw - 96px));
  pointer-events: auto;
}

.image-viewer-stage img {
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: calc(100vh - 140px);
  border-radius: 8px;
  object-fit: contain;
  background: #111827;
}

.image-viewer-stage figcaption {
  color: rgba(255, 255, 255, 0.82);
  font-size: 13px;
}

.image-viewer-close,
.image-nav {
  position: fixed;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  font-size: 28px;
  cursor: pointer;
  pointer-events: auto;
}

.image-viewer-close {
  top: 24px;
  right: 24px;
}

.image-nav.prev {
  left: 24px;
}

.image-nav.next {
  right: 24px;
}

.contact-modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 18px;
}

.contact-modal.hidden {
  display: none;
}

.contact-modal-backdrop {
  position: absolute;
  inset: 0;
  border: 0;
  background: rgba(15, 23, 42, 0.48);
  cursor: pointer;
}

.contact-modal-panel {
  position: relative;
  z-index: 1;
  width: min(520px, 100%);
  max-height: min(720px, calc(100vh - 36px));
  overflow: auto;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 24px 70px rgba(15, 23, 42, 0.28);
  padding: 18px;
}

.contact-modal-close {
  position: absolute;
  top: 10px;
  right: 10px;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  cursor: pointer;
  font-size: 22px;
  line-height: 1;
}

.contact-modal-head {
  display: grid;
  gap: 6px;
  padding-right: 42px;
  margin-bottom: 14px;
}

.contact-modal-head span {
  color: var(--primary);
  font-size: 12px;
  font-weight: 800;
}

.contact-modal-head h2 {
  margin: 0;
  font-size: 22px;
}

.contact-modal-head p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.mobile-category-nav {
  display: grid;
  gap: 8px;
}

.mobile-category-nav .category-nav-node {
  margin-left: calc(var(--depth, 0) * 10px);
}

.mobile-category-nav button {
  position: relative;
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink-soft);
  padding: 9px 10px;
  text-align: left;
}

.mobile-category-nav button.active {
  border-color: rgba(15, 118, 110, 0.34);
  background: var(--primary-soft);
  color: var(--primary);
}

.mobile-category-nav strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.contact-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.contact-tags em {
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  padding: 4px 8px;
  font-size: 12px;
  font-style: normal;
  font-weight: 700;
}

.hint,
.empty-state {
  color: var(--muted);
}

.empty-state {
  display: grid;
  place-items: center;
  min-height: 360px;
  border: 1px dashed #cbd5e1;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
  text-align: center;
  padding: 28px;
}

.empty-state strong {
  display: block;
  margin-bottom: 8px;
  color: var(--text);
  font-size: 20px;
}

.empty-state p {
  margin: 0;
}

@media (max-width: 900px) {
  #app {
    width: min(100vw - 24px, 1360px);
    padding-top: 14px;
  }

  .page-head {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .headline h1 {
    font-size: 28px;
  }

  .catalog-layout {
    grid-template-columns: 1fr;
  }

  .category-panel {
    display: none;
  }

  .mobile-category-filter {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    align-items: center;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.88);
    padding: 10px;
  }

  .mobile-category-filter button {
    border: 1px solid rgba(15, 118, 110, 0.25);
    border-radius: 8px;
    background: var(--primary-soft);
    color: var(--primary);
    padding: 9px 10px;
    font-weight: 800;
  }

  .mobile-category-filter span {
    min-width: 0;
    overflow: hidden;
    color: var(--muted);
    font-size: 13px;
    text-align: right;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}

@media (max-width: 560px) {
  .item-grid,
  .spec-list {
    grid-template-columns: 1fr;
  }

  .product-media {
    height: 132px;
  }

  .contact-box {
    grid-template-columns: 1fr;
  }

  .contact-toggle {
    width: 100%;
  }

  .catalog-pagination {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .catalog-pagination span {
    grid-column: 1 / -1;
    order: -1;
    text-align: center;
  }

  .method-list {
    display: grid;
    grid-template-columns: 1fr;
  }

  .method-item {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .method-item img {
    width: 72px;
    height: 72px;
  }

  .contact-modal {
    align-items: end;
    padding: 0;
  }

  .contact-modal-panel {
    width: 100%;
    max-height: min(86vh, 720px);
    border-radius: 8px 8px 0 0;
    padding: 16px 14px 18px;
  }

  .contact-modal-head h2 {
    font-size: 20px;
  }
}