:root {
  --shoptet-red: #c8102e;
  --shoptet-red-dark: #a50d26;
  --header-height: 48px;
  --sidebar-width: 220px;
  --bg-page: #f0f2f5;
  --bg-white: #ffffff;
  --border: #d9dde3;
  --border-light: #e8ebef;
  --text: #2c3338;
  --text-muted: #6b7280;
  --link: #1a6fb5;
  --green: #2e9b4e;
  --green-dark: #258a42;
  --btn-blue: #3b82a8;
  --btn-blue-light: #5ba3c9;
  --info-bg: #e8f5e9;
  --info-border: #a5d6a7;
  --info-text: #2e5a32;
  --tab-active: #c8102e;
  --input-border: #c5cad3;
  --focus: #3b82a8;
  --font: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --text-sm: 0.8125rem;
  --text-base: 0.875rem;
  --text-lg: 1.125rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--text-base);
  color: var(--text);
  background: var(--bg-page);
  line-height: 1.4;
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

/* Top header */
.top-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--shoptet-red);
  display: flex;
  align-items: center;
  padding: 0 var(--space-md);
  z-index: 1000;
  gap: var(--space-md);
}

.top-header__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  color: #fff;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.top-header__logo:hover {
  text-decoration: none;
  color: #fff;
}

.top-header__logo svg {
  height: 28px;
  width: auto;
}

.top-header__search {
  flex: 1;
  max-width: 420px;
  margin-left: var(--space-lg);
}

.top-header__search input {
  width: 100%;
  height: 32px;
  border: none;
  border-radius: 3px;
  padding: 0 0.75rem;
  font-size: var(--text-sm);
  background: rgba(255, 255, 255, 0.95);
}

.top-header__actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  color: #fff;
  font-size: var(--text-sm);
}

.top-header__icon-btn {
  background: transparent;
  border: none;
  color: #fff;
  cursor: pointer;
  padding: var(--space-xs);
  font-size: 1.1rem;
  line-height: 1;
}

.top-header__icon-btn:hover,
.top-header__icon-btn:active {
  opacity: 0.85;
}

.top-header__user {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  line-height: 1.2;
}

.top-header__user strong {
  font-weight: 600;
}

.top-header__store-btn {
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.5);
  color: #fff;
  padding: 0.35rem 0.75rem;
  border-radius: 3px;
  cursor: pointer;
  font-size: var(--text-sm);
  white-space: nowrap;
}

.top-header__store-btn:hover {
  background: rgba(255, 255, 255, 0.3);
}

.top-header__store-btn:active {
  background: rgba(255, 255, 255, 0.15);
}

/* Layout */
.app-layout {
  display: flex;
  padding-top: var(--header-height);
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: var(--bg-white);
  border-right: 1px solid var(--border);
  position: fixed;
  top: var(--header-height);
  bottom: 0;
  left: 0;
  overflow-y: auto;
  padding: var(--space-sm) 0;
  z-index: 100;
}

.sidebar__section {
  margin-bottom: var(--space-xs);
}

.sidebar__link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 1rem;
  color: var(--text);
  font-size: var(--text-sm);
  text-decoration: none;
  border-left: 3px solid transparent;
}

.sidebar__link:hover {
  background: #f5f6f8;
  text-decoration: none;
}

.sidebar__link--active {
  background: #fdf2f4;
  border-left-color: var(--shoptet-red);
  color: var(--shoptet-red);
  font-weight: 600;
}

.sidebar__link--parent {
  font-weight: 600;
}

.sidebar__icon {
  width: 18px;
  text-align: center;
  opacity: 0.75;
  flex-shrink: 0;
}

.sidebar__sub {
  list-style: none;
  margin: 0;
  padding: 0 0 0.25rem 0;
}

.sidebar__sub a {
  display: block;
  padding: 0.35rem 1rem 0.35rem 2.5rem;
  color: var(--text-muted);
  font-size: var(--text-sm);
  text-decoration: none;
}

.sidebar__sub a:hover {
  color: var(--text);
  background: #f5f6f8;
}

.sidebar__sub a.is-active {
  color: var(--shoptet-red);
  font-weight: 600;
}

/* Main content */
.main {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: var(--space-md) var(--space-lg) var(--space-xl);
  min-width: 0;
}

.breadcrumbs {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-md);
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: center;
}

.breadcrumbs a {
  color: var(--link);
}

.breadcrumbs__sep {
  color: #9ca3af;
}

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.page-header__title {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
}

.page-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.45rem 0.85rem;
  border-radius: 3px;
  border: 1px solid transparent;
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: background 200ms ease-in-out, border-color 200ms ease-in-out;
}

.btn:hover {
  text-decoration: none;
}

.btn--save {
  background: var(--green);
  color: #fff;
  border-color: var(--green-dark);
}

.btn--save:hover {
  background: var(--green-dark);
}

.btn--save:active {
  filter: brightness(0.92);
}

.btn--secondary {
  background: #e8f4fa;
  color: #1a5a7a;
  border-color: #b8d4e8;
}

.btn--secondary:hover {
  background: #d5ebf5;
}

.btn--secondary:active {
  background: #c5e0ef;
}

.btn--help {
  background: #2b6cb0;
  color: #fff;
  border-color: #245a94;
}

.btn--help:hover {
  background: #245a94;
}

.btn--danger {
  background: #fef2f2;
  color: #b91c1c;
  border-color: #fecaca;
}

.btn--danger:hover {
  background: #fee2e2;
}

/* Info banner */
.info-banner {
  background: var(--info-bg);
  border: 1px solid var(--info-border);
  color: var(--info-text);
  padding: 0.75rem 1rem;
  border-radius: 3px;
  margin-bottom: var(--space-md);
  font-size: var(--text-sm);
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

.info-banner__icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  background: #43a047;
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  margin-top: 1px;
}

.toast {
  display: none;
  background: #e8f5e9;
  border: 1px solid #81c784;
  color: #1b5e20;
  padding: 0.75rem 1rem;
  border-radius: 3px;
  margin-bottom: var(--space-md);
  font-size: var(--text-sm);
  font-weight: 600;
}

.toast.is-visible {
  display: block;
}

.toast--error {
  background: #fef2f2;
  border-color: #fca5a5;
  color: #991b1b;
}

/* Tabs */
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-bottom: 2px solid var(--border);
  margin-bottom: 0;
  background: var(--bg-white);
  padding: 0 var(--space-md);
  border-radius: 3px 3px 0 0;
}

.tabs__item {
  padding: 0.75rem 1rem;
  font-size: var(--text-sm);
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  font-weight: 500;
}

.tabs__item:hover {
  color: var(--text);
  text-decoration: none;
}

.tabs__item--active {
  color: var(--tab-active);
  border-bottom-color: var(--tab-active);
  font-weight: 600;
}

/* Panel / card */
.panel {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 3px 3px;
  padding: var(--space-lg);
}

.panel--standalone {
  border-top: 1px solid var(--border);
  border-radius: 3px;
}

.section-title {
  margin: 0 0 var(--space-md);
  font-size: 1rem;
  font-weight: 600;
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--border-light);
}

/* Forms */
.form-row {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: var(--space-md);
  align-items: start;
  margin-bottom: 1.1rem;
}

.form-label {
  padding-top: 0.45rem;
  font-size: var(--text-sm);
  color: var(--text);
}

.form-label .required {
  color: var(--shoptet-red);
}

.form-control {
  width: 100%;
  max-width: 280px;
  height: 34px;
  padding: 0 0.6rem;
  border: 1px solid var(--input-border);
  border-radius: 3px;
  font-size: var(--text-sm);
  font-family: inherit;
  color: var(--text);
  background: #fff;
}

.form-control:hover {
  border-color: #a8b0bc;
}

.form-control:disabled,
.form-control[readonly] {
  background: #f5f6f8;
  color: var(--text-muted);
}

.form-control--sm {
  max-width: 120px;
}

.form-control--xs {
  max-width: 90px;
}

.price-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.price-group .form-control {
  max-width: 110px;
}

.price-group select.form-control {
  max-width: 160px;
}

.hint {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.radio-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-top: 0.35rem;
}

.radio-option,
.check-option {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--text-sm);
  cursor: pointer;
}

.action-price-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.action-price-row .form-control {
  max-width: 110px;
}

.date-field {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.date-field label {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.date-field input {
  width: 120px;
  height: 34px;
  padding: 0 0.5rem;
  border: 1px solid var(--input-border);
  border-radius: 3px;
  font-size: var(--text-sm);
  font-family: inherit;
}

/* Product list table */
.table-wrap {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.data-table th,
.data-table td {
  padding: 0.65rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}

.data-table th {
  background: #f7f8fa;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
}

.data-table tr:hover td {
  background: #fafbfc;
}

.data-table .price {
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.badge {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  border-radius: 3px;
  font-size: 0.7rem;
  font-weight: 600;
}

.badge--sale {
  background: #fef3c7;
  color: #92400e;
}

.badge--ok {
  background: #dcfce7;
  color: #166534;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  align-items: center;
}

.toolbar__search {
  flex: 1;
  min-width: 200px;
  max-width: 360px;
}

.toolbar__search .form-control {
  max-width: 100%;
}

.meta-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.meta-bar strong {
  color: var(--text);
}

.footer-note {
  margin-top: var(--space-lg);
  padding: var(--space-md);
  background: #fff8e6;
  border: 1px solid #f0d78c;
  border-radius: 3px;
  font-size: var(--text-sm);
  color: #6b5a1e;
}

@media (max-width: 768px) {
  .sidebar {
    display: none;
  }

  .main {
    margin-left: 0;
    padding: var(--space-md);
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }

  .top-header__search {
    display: none;
  }

  .top-header__user {
    display: none;
  }
}