:root {
  --bg: var(--tg-theme-bg-color, #ffffff);
  --secondary-bg: var(--tg-theme-secondary-bg-color, #f0f0f3);
  --text: var(--tg-theme-text-color, #1c1c1e);
  --hint: var(--tg-theme-hint-color, #8e8e93);
  --link: var(--tg-theme-link-color, #2481cc);
  --button: var(--tg-theme-button-color, #2481cc);
  --button-text: var(--tg-theme-button-text-color, #ffffff);
  --stock-ok: #34a853;
  --stock-empty: #c0392b;
}

* { box-sizing: border-box; }

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

#app {
  padding: 10px 12px 24px;
}

#search-bar {
  position: sticky;
  top: 0;
  background: var(--bg);
  padding: 4px 0 8px;
  z-index: 5;
}

#search-input {
  width: 100%;
  padding: 10px 14px;
  border-radius: 12px;
  border: none;
  background: var(--secondary-bg);
  color: var(--text);
  font-size: 15px;
  outline: none;
}

#filters {
  display: flex;
  justify-content: flex-end;
  padding: 6px 2px 10px;
}

.stock-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--hint);
}

.stock-toggle input { accent-color: var(--button); }

#categories {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.category-card {
  background: var(--secondary-bg);
  border-radius: 12px;
  padding: 12px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.category-card .cat-name {
  font-size: 14px;
  font-weight: 600;
}

.category-card .cat-count {
  font-size: 12px;
  color: var(--hint);
}

#breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 0 10px;
}

#breadcrumb.hidden, #categories.hidden, #load-more-wrap.hidden {
  display: none;
}

#back-btn {
  background: none;
  border: none;
  color: var(--link);
  font-size: 14px;
  padding: 4px 0;
}

#current-category-name {
  font-weight: 600;
  font-size: 14px;
}

#products {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.product-card {
  background: var(--secondary-bg);
  border-radius: 12px;
  padding: 12px 14px;
}

.product-name {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
}

.product-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--hint);
}

.product-price {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}

.product-stock {
  font-weight: 600;
}

.product-stock.ok { color: var(--stock-ok); }
.product-stock.empty { color: var(--stock-empty); }

#load-more-wrap {
  padding-top: 12px;
  display: flex;
  justify-content: center;
}

#load-more-btn {
  background: var(--button);
  color: var(--button-text);
  border: none;
  border-radius: 10px;
  padding: 10px 20px;
  font-size: 14px;
}

#status {
  text-align: center;
  color: var(--hint);
  font-size: 13px;
  padding: 20px 0;
}

.hidden { display: none; }

.add-to-invoice-btn {
  margin-top: 8px;
  width: 100%;
  background: var(--button);
  color: var(--button-text);
  border: none;
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 13px;
}

#invoice-open-btn {
  width: 100%;
  background: var(--button);
  color: var(--button-text);
  border: none;
  border-radius: 10px;
  padding: 12px;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 10px;
}

#invoice-view {
  display: flex;
  flex-direction: column;
}

#invoice-view-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 4px 0 10px;
}

#invoice-view-header span {
  font-size: 15px;
  font-weight: 700;
}

#invoice-close-btn {
  background: none;
  border: none;
  color: var(--link);
  font-size: 14px;
  padding: 4px 0;
}

#invoice-items {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-bottom: 10px;
}

.invoice-item-row {
  background: var(--secondary-bg);
  border-radius: 10px;
  padding: 10px 12px;
}

.invoice-item-name {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
}

.invoice-item-controls {
  display: flex;
  align-items: flex-end;
  gap: 8px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.field label {
  font-size: 11px;
  color: var(--hint);
}

.qty-input, .price-input {
  width: 64px;
  padding: 6px 8px;
  border-radius: 8px;
  border: none;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}

.field-sum {
  margin-left: auto;
  align-items: flex-end;
}

.invoice-item-sum {
  font-weight: 700;
  font-size: 14px;
  padding: 6px 0;
}

.remove-btn {
  background: none;
  border: none;
  color: var(--stock-empty);
  font-size: 15px;
  padding: 0 4px;
}

#invoice-total {
  padding: 10px 0;
  font-weight: 700;
  font-size: 15px;
  border-top: 1px solid var(--secondary-bg);
}

#invoice-note {
  margin: 0 0 10px;
  padding: 10px 14px;
  border-radius: 10px;
  border: none;
  background: var(--secondary-bg);
  color: var(--text);
  font-size: 14px;
  outline: none;
  width: 100%;
}

#invoice-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-bottom: 10px;
}

#invoice-send-btn {
  background: var(--button);
  color: var(--button-text);
  border: none;
  border-radius: 10px;
  padding: 12px;
  font-size: 14px;
  font-weight: 600;
}

#invoice-clear-btn {
  background: none;
  border: none;
  color: var(--stock-empty);
  padding: 8px;
  font-size: 13px;
}

#invoice-status {
  text-align: center;
  color: var(--hint);
  font-size: 13px;
  padding: 0 0 16px;
}