:root {
  color-scheme: light dark;
  --accent: #2b8aef;
  --bg: var(--tg-theme-bg-color, #ffffff);
  --text: var(--tg-theme-text-color, #111111);
  --hint: var(--tg-theme-hint-color, #888888);
  --button-bg: var(--tg-theme-button-color, #2b8aef);
  --button-text: var(--tg-theme-button-text-color, #ffffff);
  --secondary-bg: var(--tg-theme-secondary-bg-color, #f2f2f2);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  padding-bottom: 80px;
}

.topbar {
  padding: 16px;
  border-bottom: 1px solid var(--secondary-bg);
}
.topbar h1 { margin: 0; font-size: 22px; }
.topbar .subtitle { color: var(--hint); font-size: 13px; }
#search-input {
  display: block;
  width: 100%;
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--secondary-bg);
  background: var(--secondary-bg);
  color: var(--text);
  font-size: 15px;
}

.category-tabs {
  display: flex;
  gap: 8px;
  padding: 10px 16px;
  overflow-x: auto;
  white-space: nowrap;
}
.category-tab {
  flex: none;
  padding: 7px 14px;
  border-radius: 20px;
  background: var(--secondary-bg);
  color: var(--text);
  font-size: 13px;
  border: none;
}
.category-tab.active {
  background: var(--button-bg);
  color: var(--button-text);
}

.load-more {
  display: block;
  margin: 8px auto 90px;
  padding: 12px 24px;
  border-radius: 10px;
  border: none;
  background: var(--secondary-bg);
  color: var(--text);
  font-weight: 600;
}
.load-more.hidden { display: none; }

.loading {
  text-align: center;
  color: var(--hint);
  padding: 10px;
}
.loading.hidden { display: none; }

.catalog {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  padding: 12px;
}
@media (min-width: 600px) {
  .catalog { grid-template-columns: repeat(3, 1fr); }
}

.product-card {
  background: var(--secondary-bg);
  border-radius: 12px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.product-card img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 8px;
  background: #ddd;
}
.product-card .title { font-size: 14px; font-weight: 600; }
.product-card .price { font-size: 15px; color: var(--accent); font-weight: 700; }
.product-card .desc { font-size: 12px; color: var(--hint); }

.qty-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
}
.qty-row button {
  width: 30px; height: 30px; border-radius: 8px; border: none;
  background: var(--button-bg); color: var(--button-text); font-size: 16px;
}
.qty-row .qty-value { min-width: 24px; text-align: center; font-weight: 600; }

.cart-bar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--button-bg);
  color: var(--button-text);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
}
.cart-bar.hidden { display: none; }
.cart-bar button {
  background: rgba(255,255,255,0.2);
  color: var(--button-text);
  border: none;
  padding: 8px 16px;
  border-radius: 8px;
  font-weight: 700;
}

.modal {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex; align-items: flex-end;
  z-index: 10;
}
.modal.hidden { display: none; }
.modal-content {
  background: var(--bg);
  color: var(--text);
  width: 100%;
  border-radius: 16px 16px 0 0;
  padding: 20px;
  max-height: 80vh;
  overflow-y: auto;
}
.modal-content textarea {
  width: 100%;
  min-height: 70px;
  margin: 12px 0;
  border-radius: 8px;
  border: 1px solid var(--secondary-bg);
  padding: 8px;
  font-family: inherit;
}
.modal-actions {
  display: flex;
  gap: 8px;
}
.modal-actions button {
  flex: 1;
  padding: 12px;
  border-radius: 8px;
  border: none;
  font-weight: 700;
}
#cancel-checkout { background: var(--secondary-bg); color: var(--text); }
#submit-order { background: var(--button-bg); color: var(--button-text); }

.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--hint);
  padding: 40px 16px;
}