:root {
  --vs-bg: #F5F5F7;
  --vs-surface: #FFFFFF;
  --vs-accent: #0D6EFD;
  --vs-accent-hover: #0A58CA;
  --vs-text: #21201F;
  --vs-text-muted: #7A7A7A;
  --vs-border: #E8E8E8;
  --vs-success: #28A745;
  --vs-navbar-height: 64px;
  --vs-sticky-gap: 16px;
  --vs-radius-lg: 20px;
  --vs-radius-md: 16px;
  --vs-radius-sm: 12px;
  --vs-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
  --vs-shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--vs-bg);
  color: var(--vs-text);
  font-family: "YS Text", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  letter-spacing: -0.02em;
}

.navbar {
  background: #FFFFFF !important;
  border-bottom: none;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
  z-index: 1040;
}

.navbar-brand {
  color: var(--vs-text) !important;
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: 1.25rem;
}

.navbar .form-control {
  background: var(--vs-bg);
  border: none;
  border-radius: var(--vs-radius-md);
  padding: 0.6rem 1rem;
}

.nav-link {
  color: var(--vs-text) !important;
  font-weight: 500;
  padding: 0.5rem 1rem !important;
  border-radius: var(--vs-radius-sm);
  transition: background 0.2s;
}

.nav-link:hover {
  background: var(--vs-bg);
}

.nav-link.active {
  background: var(--vs-accent);
  color: var(--vs-text) !important;
}

.btn {
  border-radius: var(--vs-radius-sm);
  font-weight: 600;
  padding: 0.6rem 1.2rem;
  transition: all 0.2s ease;
  border: none;
}

.btn-sm {
  padding: 0.4rem 0.8rem;
  font-size: 0.875rem;
  border-radius: 10px;
}

.btn-dark, .btn-primary {
  background: var(--vs-accent);
  color: #FFFFFF;
}

.btn-dark:hover, .btn-primary:hover {
  background: var(--vs-accent-hover);
  color: #FFFFFF;
  transform: translateY(-1px);
}

.btn-outline-dark {
  background: var(--vs-bg);
  color: var(--vs-text);
}

.btn-outline-dark:hover {
  background: #E8E8E8;
  color: var(--vs-text);
}

.btn-outline-dark.active {
  background: var(--vs-text);
  color: var(--vs-accent);
}

.btn-outline-danger {
  background: #FFF0F0;
  color: #E32636;
  border: none;
}

.btn-outline-danger:hover {
  background: #FFE0E0;
  color: #E32636;
}

.btn-danger {
  background: #E32636;
  color: #FFFFFF;
  border: none;
}

.btn-danger:hover {
  background: #CC2230;
  color: #FFFFFF;
}

.form-control, .form-select {
  border: 1px solid var(--vs-border);
  border-radius: var(--vs-radius-sm);
  color: var(--vs-text);
  padding: 0.6rem 1rem;
  background: var(--vs-surface);
}

.form-control:focus, .form-select:focus {
  border-color: var(--vs-accent);
  box-shadow: 0 0 0 4px rgba(0, 102, 255, 0.2);
  outline: none;
}

.card {
  border: none;
  border-radius: var(--vs-radius-lg);
  box-shadow: var(--vs-shadow);
  background: var(--vs-surface);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.shadow-sm {
  box-shadow: var(--vs-shadow) !important;
}

.surface {
  background: var(--vs-surface);
  border-radius: var(--vs-radius-lg);
  box-shadow: var(--vs-shadow);
}

.catalog-layout {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 1.5rem;
  align-items: start;
}

.filters-panel {
  background: var(--vs-surface);
  border: none;
  border-radius: var(--vs-radius-lg);
  box-shadow: var(--vs-shadow);
}

.filters-panel .card-body {
  padding: 1.5rem;
}

.results-toolbar {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  margin-bottom: 1.5rem;
}

.results-query-summary {
  color: var(--vs-text-muted);
  font-size: 0.9rem;
}

#resultsCount {
  background: var(--vs-accent);
  color: #FFFFFF;
  border-radius: 8px;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border: none;
}

.nav-link-project,
.nav-link-compare {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-project-badge,
.nav-compare-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.5rem;
  height: 1.5rem;
  padding: 0 0.4rem;
  border-radius: 999px;
  background: var(--vs-accent);
  color: #FFFFFF;
  font-size: 0.8rem;
  font-weight: 800;
  line-height: 1;
}

.product-card.in-project {
  box-shadow: 0 0 0 2px var(--vs-text);
}

.product-card {
  height: 100%;
  overflow: hidden;
  padding: 0.5rem;
}

.product-card:hover {
  box-shadow: var(--vs-shadow-hover);
  transform: translateY(-4px);
}

.product-card.selected {
  box-shadow: 0 0 0 2px var(--vs-accent);
}

.product-card .card-body {
  padding: 1rem;
}

.product-price {
  color: var(--vs-text);
  font-weight: 800;
  font-size: 1.25rem;
}

.btn-compare-toggle {
  background: var(--vs-bg);
  color: var(--vs-text);
  border-radius: var(--vs-radius-sm);
  padding: 0.4rem 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  transition: all 0.2s;
}

.btn-compare-toggle:hover {
  background: #E8E8E8;
}

.btn-compare-toggle.btn-dark {
  background: var(--vs-text);
  color: var(--vs-accent);
}

.btn-project-toggle {
  background: var(--vs-bg);
  color: var(--vs-text);
  border-radius: var(--vs-radius-sm);
  padding: 0.4rem 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  transition: all 0.2s;
}

.btn-project-toggle:hover {
  background: #E8E8E8;
}

.btn-project-toggle.btn-dark {
  background: var(--vs-text);
  color: var(--vs-accent);
}

.product-open-btn {
  width: 100%;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-inline: 0.5rem;
  margin-top: 0.5rem !important;
}

.product-card-actions .btn,
.product-card-actions .btn-compare-toggle {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 1 1 0;
}

.product-card-actions .btn,
.product-card-actions .btn-compare-toggle,
.product-open-btn {
  text-align: center;
  font-size: 0.875rem;
  line-height: 1.2;
}

.product-card .ratio {
  border-radius: var(--vs-radius-sm);
  overflow: hidden;
  background: var(--vs-bg) !important;
}

.fan-photo {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  padding: 1rem;
}

.empty-state-card {
  background: var(--vs-surface);
  border: none;
  border-radius: var(--vs-radius-lg);
  padding: 3rem 1.5rem;
  box-shadow: var(--vs-shadow);
}

.search-params-summary {
  background: var(--vs-bg);
  border: none;
  border-radius: var(--vs-radius-md);
  padding: 1rem 1.5rem;
}

.search-params-summary .params {
  color: var(--vs-text-muted);
}

.analogs-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
}

.badge-analog {
  background: var(--vs-accent);
  color: #FFFFFF;
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 700;
  margin-left: 0.5rem;
}

.analog-card {
  display: grid;
  grid-template-columns: auto 64px 1fr auto;
  gap: 1rem;
  align-items: center;
  background: var(--vs-surface);
  border-radius: var(--vs-radius-md);
  padding: 1rem;
  box-shadow: var(--vs-shadow);
  margin-bottom: 0.5rem;
}

.analog-match {
  background: var(--vs-accent);
  color: #FFFFFF;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border: none;
}

.analog-card .analog-img {
  width: 64px;
  height: 64px;
  border-radius: 10px;
  overflow: hidden;
  background: var(--vs-bg);
}

.analog-model {
  font-weight: 700;
  font-size: 1.1rem;
}

.analog-params {
  color: var(--vs-text-muted);
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

.chart-container {
  border: none;
  border-radius: var(--vs-radius-lg);
  background: var(--vs-surface);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--vs-shadow);
}

.chart-canvas-wrap {
  width: 100%;
  height: 400px;
  position: relative;
}

.chart-canvas-wrap canvas {
  width: 100% !important;
  height: 100% !important;
}

.chart-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--vs-text-muted);
  text-transform: uppercase;
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}

.compare-table {
  background: var(--vs-surface);
  border-radius: var(--vs-radius-lg);
  overflow: hidden;
  box-shadow: var(--vs-shadow);
}

.compare-table th {
  background: var(--vs-bg);
  font-weight: 600;
  padding: 1rem;
  border-bottom: 2px solid var(--vs-border);
  position: sticky;
  top: var(--vs-navbar-height);
  z-index: 10;
}

.compare-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--vs-border);
}

.compare-table .param-name {
  color: var(--vs-text-muted);
  font-weight: 500;
}

.compare-table .best {
  color: var(--vs-success);
  font-weight: 700;
  background: rgba(40, 167, 69, 0.1);
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
}

.export-bar {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  background: var(--vs-surface);
  border: none;
  border-radius: var(--vs-radius-lg);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--vs-shadow);
}

.export-bar p {
  margin: 0;
  color: var(--vs-text-muted);
  font-size: 0.9rem;
  margin-top: 0.25rem;
}

.product-hero {
  display: grid;
  grid-template-columns: minmax(300px, 460px) 1fr;
  gap: 2rem;
  align-items: stretch;
}

.product-summary-card {
  background: var(--vs-surface);
  border: 1px solid var(--vs-border);
  border-radius: var(--vs-radius-lg);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.05);
  padding: 2.5rem;
}

.product-summary-card .h3,
.product-summary-card .h4 {
  font-weight: 800;
  letter-spacing: -0.02em;
}

#productSubtitle {
  font-size: 1.1rem;
  color: var(--vs-text-muted) !important;
  margin-top: 0.5rem;
}

#productPrice {
  color: var(--vs-text);
  font-weight: 800;
  font-size: clamp(2rem, 4vw, 2.5rem);
  margin-top: 1.5rem;
  margin-bottom: 2rem;
}

.product-action-btn {
  width: 100%;
  min-height: 48px;
  border-radius: var(--vs-radius-sm);
  font-size: 1rem;
}

#productImage {
  border-radius: var(--vs-radius-lg);
  overflow: hidden;
  background: var(--vs-bg);
  border: 1px solid var(--vs-border);
  padding: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

#productImage .fan-photo {
  object-fit: contain;
  max-height: 400px;
}

.tabs-card {
  background: var(--vs-surface);
  border: 1px solid var(--vs-border);
  border-radius: var(--vs-radius-lg);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.05);
  overflow: hidden;
}

.tabs-card .nav-tabs {
  border-bottom: 1px solid var(--vs-border);
  gap: 0;
  padding: 0 1rem;
  background: var(--vs-bg);
}

.tabs-card .nav-link {
  border: 0;
  border-bottom: 3px solid transparent;
  border-radius: 0;
  color: var(--vs-text-muted) !important;
  font-weight: 600;
  padding: 1rem 1.5rem;
  background: transparent;
}

.tabs-card .nav-link.active {
  color: var(--vs-text) !important;
  border-bottom-color: var(--vs-accent);
  background: var(--vs-surface);
}

.product-chart-wrap {
  min-height: 320px;
  border: none;
  border-radius: var(--vs-radius-md);
  padding: 1rem;
  background: var(--vs-bg);
}

.breadcrumbs {
  font-size: 0.9rem;
  color: var(--vs-text-muted);
  margin-bottom: 1rem !important;
}

.breadcrumbs a {
  color: var(--vs-text);
  text-decoration: none;
  font-weight: 500;
}

.breadcrumbs a:hover {
  text-decoration: underline;
}

.doc-list li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--vs-border);
}

.doc-list li:last-child {
  border-bottom: none;
}

#specTableBody th {
  color: var(--vs-text-muted);
  font-weight: 500;
  padding: 0.75rem 1rem;
  background: var(--vs-bg);
  border-bottom: 1px solid var(--vs-border);
}

#specTableBody td {
  font-weight: 600;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--vs-border);
}

body[data-page="product"] .tabs-card .card-body {
  padding: 2rem;
}

.mobile-filters-fab {
  position: fixed;
  right: 16px;
  bottom: calc(env(safe-area-inset-bottom, 0px) + 20px);
  z-index: 1035;
  min-height: 48px;
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  padding-inline: 1.5rem;
  font-weight: 700;
  font-size: 1rem;
}

.cabinet-page .cabinet-card,
.cabinet-page .cabinet-toolbar {
  height: 100%;
  background: var(--vs-surface);
  border: none;
  border-radius: var(--vs-radius-lg);
  box-shadow: var(--vs-shadow);
}

.cabinet-empty {
  text-align: center;
  border: 2px dashed var(--vs-border);
  border-radius: var(--vs-radius-lg);
  padding: 4rem 2rem;
  background: var(--vs-bg);
}

.cabinet-table th {
  background: var(--vs-bg);
  font-weight: 600;
  color: var(--vs-text-muted);
  padding: 1rem;
  border-bottom: none;
}

.cabinet-table td {
  padding: 1rem;
  vertical-align: middle;
  border-bottom: 1px solid var(--vs-border);
}

.cabinet-table a {
  font-weight: 700;
  text-decoration: none;
  color: var(--vs-text);
}

.cabinet-table a:hover {
  color: var(--vs-accent-hover);
}

.cabinet-total-row th {
  font-size: 1.1rem;
  color: var(--vs-text);
  font-weight: 800;
  background: var(--vs-surface);
  border-top: 2px solid var(--vs-border);
}

.admin-page .admin-login-wrap {
  display: flex;
  justify-content: center;
  padding-top: 4rem;
}

.admin-table {
  background: var(--vs-surface);
  border-radius: var(--vs-radius-lg);
  overflow: hidden;
}

.admin-table th {
  background: var(--vs-bg);
  font-weight: 600;
  color: var(--vs-text-muted);
  padding: 1rem;
  border-bottom: none;
}

.admin-table td {
  padding: 1rem;
  vertical-align: middle;
  border-bottom: 1px solid var(--vs-border);
}

.admin-table code {
  font-size: 0.9rem;
  background: var(--vs-bg);
  padding: 0.2rem 0.4rem;
  border-radius: 6px;
  color: var(--vs-text);
}

.auth-page .nav-tabs {
  border-bottom: 1px solid var(--vs-border);
  gap: 0;
}

.auth-page .nav-tabs .nav-link {
  font-size: 1rem;
  font-weight: 600;
  color: var(--vs-text-muted) !important;
  border: none;
  border-bottom: 3px solid transparent;
  padding: 1rem 1.5rem;
}

.auth-page .nav-tabs .nav-link.active {
  color: var(--vs-text) !important;
  border-bottom-color: var(--vs-accent);
  background: transparent;
}

.auth-main-narrow {
  max-width: 480px;
  margin: 0 auto;
}

.auth-main-wide {
  max-width: none;
  width: 100%;
}

.auth-page #authNavUser:not(.d-none) ~ #authNavGuest {
  display: none !important;
}

.modal-content {
  border: none;
  border-radius: var(--vs-radius-lg);
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.12);
}

.modal-header {
  border-bottom: 1px solid var(--vs-border);
  padding: 1.5rem;
}

.modal-body {
  padding: 1.5rem;
}

.modal-footer {
  border-top: 1px solid var(--vs-border);
  padding: 1.5rem;
}

@media (max-width: 991.98px) {
  .product-card-actions {
    display: flex !important;
    flex-direction: column;
    gap: 0.5rem !important;
  }

  .product-card-actions .btn,
  .product-card-actions .btn-compare-toggle,
  .product-open-btn {
    width: 100%;
    min-height: 40px;
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    height: auto;
    padding: 0.4rem;
    line-height: 1.1;
  }
  
  .btn-compare-toggle {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    height: auto;
    padding: 0.4rem;
    line-height: 1.1;
  }
  body[data-page="catalog"] {
    padding-top: 72px;
    padding-bottom: 24px;
  }

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

  .results-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .product-hero {
    grid-template-columns: 1fr;
  }

  body[data-page="product"] .product-hero {
    gap: 1rem;
  }

  body[data-page="product"] .tabs-card .nav-link {
    font-size: 0.9rem;
    padding: 0.75rem 1rem;
  }

  body[data-page="product"] .tabs-card .card-body {
    padding: 1.25rem;
  }

  body[data-page="product"] .product-chart-wrap {
    min-height: 250px;
    padding: 0.5rem;
  }

  .analog-card {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .analog-card .analog-img {
    margin: 0 auto;
  }

  .export-bar {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .product-price {
    font-size: 1.2rem;
  }

  .product-card dl.row.small {
    --bs-gutter-x: 0.5rem;
    row-gap: 0.25rem;
    font-size: 0.85rem !important;
  }

  .product-card dl.row.small dt {
    color: var(--vs-text-muted) !important;
    font-weight: 500;
    margin-bottom: 0 !important;
  }

  .product-card dl.row.small dd {
    text-align: right;
    font-weight: 600;
    margin-bottom: 0 !important;
  }
}

@media (min-width: 768px) {
  .offcanvas-md.offcanvas-start {
    position: sticky !important;
    top: calc(var(--vs-navbar-height) + var(--vs-sticky-gap)) !important;
    align-self: start;
    transform: none;
    visibility: visible !important;
    border-right: 0;
    height: fit-content;
    background: transparent;
  }

  .offcanvas-md .offcanvas-header {
    display: none;
  }

  .offcanvas-md .offcanvas-body {
    padding: 0;
    overflow: visible;
  }

  .filters-panel {
    position: relative;
    top: auto;
    max-height: calc(100vh - var(--vs-navbar-height) - (var(--vs-sticky-gap) * 2));
    overflow: auto;
  }
}

@media (min-width: 992px) {
  .compare-bar-link,
  .project-bar-link {
    margin-left: auto;
    width: auto;
  }
}

/* Custom Dropdown Styles */
.dropdown-menu {
  border: 1px solid var(--vs-border);
  border-radius: var(--vs-radius-md);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
  padding: 0.5rem;
  margin-top: 0.5rem !important;
  font-size: 1rem;
}

.dropdown-item {
  border-radius: 8px;
  padding: 0.6rem 1rem;
  font-weight: 500;
  color: var(--vs-text);
  transition: background-color 0.2s, color 0.2s;
}

.dropdown-item:hover, .dropdown-item:focus {
  background-color: var(--vs-bg);
  color: var(--vs-accent);
}

.dropdown-divider {
  border-top-color: var(--vs-border);
  opacity: 1;
  margin: 0.5rem 0;
}

.navbar .dropdown-toggle {
  background: var(--vs-surface);
  border: 2px solid #D6E4FF;
  border-radius: var(--vs-radius-sm);
  padding: 0.5rem 1rem !important;
  color: var(--vs-text) !important;
  transition: all 0.2s;
}

.navbar .dropdown-toggle:hover, .navbar .dropdown-toggle:focus {
  border-color: var(--vs-accent);
  background: #F0F5FF;
}

.navbar .dropdown-toggle::after {
  margin-left: 0.5rem;
  vertical-align: middle;
}