/* CSS Custom Properties */
:root {
  /* Brand colors */
  --color-blue: #2563eb;
  --color-blue-light: #3b82f6;
  --color-blue-dark: #1d4ed8;
  --color-orange: #f97316;
  --color-orange-light: #fb923c;
  --color-orange-dark: #ea580c;

  /* Light theme (default) */
  --color-bg: #ffffff;
  --color-bg-secondary: #f8fafc;
  --color-bg-tertiary: #f1f5f9;
  --color-text: #1e293b;
  --color-text-secondary: #475569;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --color-border-focus: var(--color-blue);
  --color-shadow: rgba(0, 0, 0, 0.1);
  --color-link: var(--color-blue);
  --color-link-hover: var(--color-blue-dark);

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Border radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 200ms ease;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;

  /* Layout */
  --max-width: 1200px;
  --header-height: auto;
}

/* Dark theme */
[data-theme="dark"] {
  --color-bg: #0f172a;
  --color-bg-secondary: #1e293b;
  --color-bg-tertiary: #334155;
  --color-text: #f1f5f9;
  --color-text-secondary: #cbd5e1;
  --color-text-muted: #94a3b8;
  --color-border: #334155;
  --color-shadow: rgba(0, 0, 0, 0.3);
  --color-link: var(--color-blue-light);
  --color-link-hover: var(--color-blue);
}

/* Reset & Base */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

/* Accessibility */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-blue);
  color: white;
  border-radius: var(--radius-md);
  z-index: 1000;
  text-decoration: none;
  font-weight: 600;
}

.skip-link:focus {
  top: var(--spacing-md);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus styles */
:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

/* Layout */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Header */
.header {
  background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-blue-dark) 100%);
  color: white;
  padding: var(--spacing-xl) 0;
  text-align: center;
  position: relative;
}

.header-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.logo {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin: 0 0 var(--spacing-sm);
  letter-spacing: -0.02em;
}

.logo-baan {
  color: white;
}

.logo-search {
  color: var(--color-orange);
}

.tagline {
  margin: 0;
  font-size: var(--font-size-lg);
  opacity: 0.9;
}

.theme-toggle {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: rgba(255, 255, 255, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
  transition: background var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: #ffffff;
}

.theme-toggle:hover {
  background: rgba(255, 255, 255, 0.35);
}

.theme-icon {
  font-size: 1.25rem;
  line-height: 1;
}

.theme-text {
  font-size: 1rem;
  font-weight: 500;
  color: #ffffff;
}

/* Main */
.main {
  padding: var(--spacing-xl) 0;
}

/* Sections */
.section {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  border: 1px solid var(--color-border);
}

.section-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin: 0 0 var(--spacing-md);
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.section-title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 1.2em;
  background: var(--color-orange);
  border-radius: 2px;
}

.section-description {
  color: var(--color-text-muted);
  margin: 0 0 var(--spacing-md);
}

.disclaimer {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin: calc(-1 * var(--spacing-xs)) 0 var(--spacing-md);
  font-style: italic;
}

/* Filters */
.filters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.filter-label {
  font-weight: 500;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.filter-input,
.filter-select {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.filter-input:focus,
.filter-select:focus {
  border-color: var(--color-blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.filter-input::placeholder {
  color: var(--color-text-muted);
}

/* Fieldsets */
.filter-fieldset {
  border: none;
  padding: 0;
  margin: 0 0 var(--spacing-lg);
}

.legend-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.legend-row .filter-legend {
  margin-bottom: 0;
}

.filter-legend {
  font-weight: 500;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
  padding: 0;
}

.filter-hint {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin: 0 0 var(--spacing-sm);
  font-style: italic;
}

.custom-tech-label {
  display: flex;
  align-items: center;
  width: 100%;
}

.custom-tech-input {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  padding: 0.75rem 1rem;
  font-size: var(--font-size-base);
  color: var(--color-text);
  flex: 1;
  outline: none;
  min-height: 44px;
}

.custom-tech-input:focus {
  border-color: var(--color-blue);
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.1);
}

.custom-tech-input::placeholder {
  color: var(--color-text-muted);
}

.tristate-label[data-state="exclude"] .custom-tech-input {
  text-decoration: line-through;
  text-decoration-color: #dc2626;
}

/* Checkbox & Radio grids */
.checkbox-grid,
.radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm) var(--spacing-md);
}

.checkbox-label,
.radio-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  cursor: pointer;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.checkbox-label:hover,
.radio-label:hover {
  background: var(--color-bg-tertiary);
}

.checkbox-label input,
.radio-label input {
  width: 16px;
  height: 16px;
  accent-color: var(--color-blue);
  cursor: pointer;
}

/* Tri-state checkbox styles */
.tristate-label {
  position: relative;
  user-select: none;
  cursor: pointer;
}

.tristate-label .tristate-checkbox {
  pointer-events: none;
}

.tristate-label[data-state="exclude"] {
  color: var(--color-text-muted);
}

.tristate-label[data-state="exclude"] .tristate-text {
  text-decoration: line-through;
  text-decoration-color: #dc2626;
}

/* Dark theme adjustments for tri-state */
[data-theme="dark"] .tristate-label[data-state="exclude"] .tristate-text {
  text-decoration-color: #f87171;
}

/* Company size examples */
.company-size-label {
  flex-direction: column;
  align-items: flex-start;
}

.company-size-examples {
  font-size: 0.75rem;
  opacity: 0.7;
  margin-left: 1.5rem;
  display: block;
}

/* Filter actions */
.filter-actions {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background: var(--color-blue);
  color: white;
}

.btn-primary:hover {
  background: var(--color-blue-dark);
}

.btn-secondary {
  background: var(--color-bg-tertiary);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-border);
}

.btn-danger {
  background: #fee2e2;
  color: #dc2626;
  border: 1px solid #fecaca;
}

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

[data-theme="dark"] .btn-danger {
  background: #450a0a;
  color: #fca5a5;
  border-color: #7f1d1d;
}

[data-theme="dark"] .btn-danger:hover {
  background: #7f1d1d;
}

.btn-small {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-sm);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Boards section */
.boards-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
}

.selected-count {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-left: auto;
}

.boards-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.board-category {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.board-category-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-bg-tertiary);
  border-bottom: 1px solid var(--color-border);
}

.category-toggle {
  font-weight: 500;
}

.category-expand-btn {
  background: none;
  border: none;
  padding: var(--spacing-xs);
  cursor: pointer;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  transition: transform var(--transition-fast);
}

.category-expand-btn:hover {
  color: var(--color-text);
}

.boards-list {
  padding: var(--spacing-sm) var(--spacing-md);
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--spacing-xs);
}

.boards-list.collapsed {
  display: none;
}

.board-checkbox {
  padding: var(--spacing-xs);
}

.board-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Presets section */
.presets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.preset-load-row,
.preset-save-row {
  display: flex;
  gap: var(--spacing-sm);
}

.preset-load-row .filter-select,
.preset-save-row .filter-input {
  flex: 1;
}

.preset-import-export {
  display: flex;
  gap: var(--spacing-sm);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border);
}

/* Results section */
.results-actions {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
}

.results-container {
  min-height: 100px;
}

.results-empty {
  text-align: center;
  padding: var(--spacing-2xl);
  color: var(--color-text-muted);
}

.results-empty .hint {
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-sm);
}

.results-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.results-category {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.results-category-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin: 0;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-bg-tertiary);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}

.results-category-links {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1px;
  background: var(--color-border);
}

.result-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-bg);
  color: var(--color-link);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.result-link:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-link-hover);
}

.result-link:focus {
  background: var(--color-bg-tertiary);
  outline-offset: -2px;
}

.result-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.result-favicon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.result-arrow {
  color: var(--color-text-muted);
  transition: transform var(--transition-fast);
  margin-left: auto;
}

.result-link:hover .result-arrow {
  transform: translateX(2px);
  color: var(--color-orange);
}

/* Footer */
.footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0;
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.footer p {
  margin: 0 0 var(--spacing-xs);
}

.footer-note {
  font-size: var(--font-size-sm);
  opacity: 0.8;
}

/* Responsive */
@media (max-width: 768px) {
  .header {
    padding: var(--spacing-lg) 0;
  }

  .logo {
    font-size: var(--font-size-2xl);
  }

  .tagline {
    font-size: var(--font-size-base);
  }

  .theme-toggle {
    top: var(--spacing-sm);
    right: var(--spacing-sm);
  }

  .section {
    padding: var(--spacing-md);
  }

  .filters-grid {
    grid-template-columns: 1fr;
  }

  .boards-list {
    grid-template-columns: 1fr;
  }

  .results-category-links {
    grid-template-columns: 1fr;
  }

  .presets-grid {
    grid-template-columns: 1fr;
  }

  .preset-load-row,
  .preset-save-row {
    flex-direction: column;
  }

  .preset-import-export {
    flex-direction: column;
  }

  .filter-actions,
  .results-actions,
  .boards-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .selected-count {
    margin-left: 0;
    text-align: center;
  }
}

/* Print styles */
@media print {
  .header,
  .filters-section,
  .boards-section,
  .presets-section,
  .results-actions,
  .footer {
    display: none;
  }

  .results-section {
    border: none;
    padding: 0;
  }

  .result-link {
    color: black;
  }

  .result-link::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #666;
  }
}