:root {
  --bg: #f7f7fb;
  --text: #111827;
  --muted: #6b7280;
  --line: #e5e7eb;
  --ok: #16a34a;
  --primary: #2563eb;
  --sidebar: 420px;
  --gap: 22px;
  --col-qty: 110px;
  --col-price: 110px;
  --col-buy: 136px;
}

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

header a:hover {
  background: rgba(255,255,255,0.2) !important;
}

.container {
  max-width: 1280px;
  margin: 24px auto;
  padding: 0 16px;
}

/* Category Tabs: Grid with 10 auto columns - exactly 10 per row, natural widths */
.category-tabs {
  display: grid;
  grid-template-columns: repeat(10, auto);
  gap: 8px;
  margin-bottom: 20px;
  justify-content: start;
}

.category-tab {
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: white;
  color: var(--text);
  font-weight: 600;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
  text-transform: uppercase;
  text-decoration: none;
}

.category-tab:hover {
  background: #f3f4f6;
}

.category-tab.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.grid {
  display: grid;
  grid-template-columns: 1fr var(--sidebar);
  gap: var(--gap);
  position: relative;
}

.grid::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc(100% - var(--sidebar) - var(--gap)/2);
  width: 1px;
  background: var(--line);
  pointer-events: none;
  z-index: 0;
}

@media (max-width:1100px) {
  .grid {
    grid-template-columns: 1fr;
  }
  .grid::before {
    display: none;
  }
}

.list-wrap {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toolbar {
  display: flex;
  gap: 8px;
  align-items: center;
  margin: 0;
}

.search {
  flex: 1;
}

.search input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.list {
  border-radius: 14px;
  overflow: hidden;
}

.cols {
  grid-template-columns: minmax(420px, 1fr) var(--col-qty) var(--col-price) var(--col-buy);
}

.thead, .row {
  display: grid;
  align-items: center;
  gap: 10px;
}

.thead {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-weight: 600;
  font-size: 14px;
}

.thead>div {
  padding: 0 16px;
}

.thead .center {
  text-align: center;
}

.row {
  display: grid;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  cursor: pointer;
}

.row:hover {
  background-color: rgba(0, 0, 0, 0.02);
}

.row>div {
  padding: 0 16px;
}

.title {
  font-weight: 600;
  line-height: 1.25;
  word-break: break-word;
}

.short-desc {
  color: var(--muted);
  font-size: 13px;
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 400px;
}

.note {
  color: var(--muted);
  font-size: 13px;
  margin-top: 2px;
  word-break: break-word;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
}

.details .note {
  white-space: normal;
  overflow: visible;
}

.row[aria-expanded="true"] .note {
  -webkit-line-clamp: initial;
}

.qty, .price {
  text-align: center;
  font-weight: 600;
}

.buy {
  display: flex;
  justify-content: flex-end;
}

.buy button {
  width: 100%;
  max-width: var(--col-buy);
  padding: 8px 10px;
  border-radius: 10px;
  background: var(--ok);
  color: #fff;
  border: 0;
  font-weight: 700;
  cursor: pointer;
}

.details {
  display: none;
  border-top: 1px dashed var(--line);
  transition: all 0.3s ease;
}

.details .inner {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 12px;
  padding: 12px 16px;
}

.d-logo {
  width: 64px;
  height: 64px;
  border-radius: 12px;
  background: #eef2ff;
  display: grid;
  place-items: center;
  font-size: 30px;
  overflow: hidden;
}

.d-logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 12px;
}

.d-title {
  margin: 0 0 6px;
  font-weight: 700;
}

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

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.side {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px;
  background: transparent;
}

.side h3 {
  margin: 0 0 8px;
  font-size: 22px;
}

.request-box {
  background: white !important;
  padding: 20px !important;
}

.request-box .muted {
  font-size: 14px;
  line-height: 1.5;
  margin-bottom: 16px;
}

.news .item {
  padding: 10px 0;
  border-top: 1px dashed var(--line);
}

.news .item:first-child {
  border-top: 0;
}

.date {
  color: #f97316;
  font-weight: 700;
}

#mc-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .38);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 999;
}

#mc {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, .15);
  width: 380px;
  max-width: 92vw;
  padding: 14px;
  color: var(--text);
}

#mc .head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

#mc .ttl {
  font-weight: 700;
}

#mc .x {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  padding: 2px 8px;
  cursor: pointer;
}

#mc .row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 10px 0;
  padding: 0;
}

#mc input {
  width: 120px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

#mc .total {
  font-weight: 800;
  font-size: 16px;
}

#mc .go {
  width: 100%;
  margin-top: 6px;
  background: var(--ok);
  color: #fff;
  border: 0;
  border-radius: 10px;
  padding: 10px 14px;
  font-weight: 800;
  cursor: pointer;
}

@media (max-width:1200px) {
  :root {
    --col-qty: 100px;
    --col-price: 100px;
    --col-buy: 128px;
  }
  .cols {
    grid-template-columns: minmax(340px, 1fr) var(--col-qty) var(--col-price) var(--col-buy);
  }
}

@media (max-width: 768px) {
  .container {
    margin: 12px auto;
    padding: 0 8px;
  }
  
  .category-tabs {
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: 4px;
  }
  
  .category-tab {
    padding: 4px 8px;
    font-size: 11px;
  }
  
  .cols {
    grid-template-columns: 1fr 80px 80px 100px;
  }
  
  .thead>div, .row>div {
    padding: 0 8px;
  }
  
  .title {
    font-size: 13px;
  }
  
  .short-desc, .note {
    font-size: 12px;
  }
  
  .sidebar {
    gap: 12px;
  }
  
  .side {
    padding: 12px;
  }
  
  .side h3 {
    font-size: 18px;
  }
  
  .request-box {
    padding: 16px !important;
  }
  
  #mc {
    width: 95vw;
    padding: 12px;
  }
  
  #mc .row {
    margin: 8px 0;
  }
  
  #mc input {
    width: 100px;
  }
}

@media (max-width: 480px) {
  .cols {
    grid-template-columns: 1fr 70px 70px 90px;
  }
  
  .category-tabs {
    grid-template-columns: repeat(auto-fit, minmax(70px, 1fr));
  }
  
  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  
  .search input {
    margin-bottom: 8px;
  }
  
  .side h3 {
    font-size: 16px;
  }
  
  .request-box .muted {
    font-size: 13px;
  }
}

/* Header responsive styles */
@media (max-width: 768px) {
  header .container {
    flex-direction: column;
    gap: 15px;
  }

  header nav {
    flex-wrap: wrap;
    justify-content: center;
  }

  header h1 {
    font-size: 20px !important;
  }
}