/*
 * PopRace.org - New Filter System Styles
 * 2025 Redesign - Mobile-First, Accessible, Modern
 */

/* ===================================
   COMPACT SEARCH HEADER
   =================================== */

.filter-search-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--color-surface);
  border-bottom: var(--border-width) solid var(--color-border);
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  height: var(--search-height);
  box-shadow: var(--shadow-sm);
}

.filter-search-input {
  flex: 1;
  height: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-surface);
  transition: all var(--transition-base) var(--transition-ease-out);
}

.filter-search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.filter-view-toggle {
  display: flex;
  gap: 2px;
  background: var(--color-surface-secondary);
  padding: 2px;
  border-radius: var(--radius-md);
  height: 100%;
}

.filter-view-btn {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: none;
  background: transparent;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-fast) var(--transition-ease-out);
}

.filter-view-btn:hover {
  background: var(--color-surface-tertiary);
}

.filter-view-btn.active {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
}

.filter-view-btn svg {
  width: 16px;
  height: 16px;
}

/* NOTE: Removed .filter-menu-toggle (Phase 2.3 cleanup)
   Element not present in HTML - orphaned CSS
*/

/* ===================================
   FILTER CHIPS (Active Filters)
   =================================== */

.filter-chips-container {
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  flex-wrap: wrap;
  gap: var(--chip-gap);
  background: var(--color-surface-secondary);
  border-bottom: var(--border-width) solid var(--color-border);
  animation: slideDown var(--transition-base) var(--transition-ease-out);
}

.filter-chips-container:empty {
  display: none;
}

.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  height: var(--chip-height);
  padding: 0 var(--chip-padding-x);
  background: var(--color-chip-bg);
  color: var(--color-chip-text);
  border: none;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast) var(--transition-ease-out);
  white-space: nowrap;
}

.filter-chip:hover {
  background: var(--color-chip-hover);
  transform: scale(1.05);
}

.filter-chip-icon {
  width: 14px;
  height: 14px;
  stroke-width: 2.5;
}

/* ===================================
   RESULTS SUMMARY BAR
   =================================== */

.filter-results-summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-surface-secondary);
  border-bottom: var(--border-width) solid var(--color-border);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  position: relative;
  z-index: var(--z-modal); /* 50 - standardized to CSS variable */
}

.filter-results-count {
  font-weight: var(--font-weight-medium);
}

.filter-sort-select {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-family: var(--font-family);
  cursor: pointer;
  transition: border-color var(--transition-fast) var(--transition-ease-out);
}

.filter-sort-select:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* ===================================
   QUICK FEATURES (Always Visible)
   =================================== */

.filter-quick-features {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-surface);
  border-bottom: var(--border-width) solid var(--color-border);
}

/* ===================================
   EXPANDABLE ADVANCED FILTERS
   =================================== */

.filter-expandable {
  border-bottom: var(--border-width) solid var(--color-border);
  background: var(--color-surface);
  width: 100%;
  max-width: 100%;
}

.filter-expandable-toggle {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
  user-select: none;
  list-style: none;
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  transition: background var(--transition-fast) var(--transition-ease-out);
  width: 100%;
  max-width: 100%;
}

.filter-expandable-toggle::-webkit-details-marker {
  display: none;
}

.filter-expandable-toggle:hover {
  background: var(--color-surface-secondary);
}

.filter-expandable-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--color-primary);
}

.filter-expandable-chevron {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-left: auto;
  transition: transform var(--transition-base) var(--transition-ease-out);
}

.filter-expandable[open] .filter-expandable-chevron {
  transform: rotate(180deg);
}

.filter-advanced-content {
  padding: var(--spacing-md);
  border-top: var(--border-width) solid var(--color-border);
  background: var(--color-surface-secondary);
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

.filter-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: var(--border-width) solid var(--color-border);
}

/* ===================================
   COMPACT FILTER GRID
   =================================== */

.filter-compact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-sm);
  width: 100%;
}

@media (min-width: 768px) {
  .filter-compact-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.filter-field-half {
  grid-column: span 1;
}

.filter-field-quarter {
  grid-column: span 1;
}

@media (max-width: 767px) {
  .filter-field-quarter {
    grid-column: span 2;
  }
}

.filter-range-compact {
  display: flex;
  align-items: center;
  gap: 4px;
}

.filter-input-sm {
  flex: 1;
  padding: 4px 8px;
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-family: var(--font-family);
  width: 100%;
}

.filter-input-sm:focus {
  outline: none;
  border-color: var(--color-primary);
}

.filter-range-compact span {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.filter-checkbox-container {
  display: flex;
  align-items: flex-end;
  padding-bottom: 4px;
}

.filter-checkbox-container .filter-checkbox-label {
  margin: 0;
}

/* ===================================
   FILTER SECTIONS (Collapsible)
   =================================== */

.filter-section {
  margin-bottom: var(--spacing-lg);
  width: 100%;
  max-width: 100%;
}

.filter-section:last-child {
  margin-bottom: 0;
}

.filter-section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) 0;
  background: transparent;
  border: none;
  width: 100%;
  max-width: 100%;
  cursor: pointer;
  text-align: left;
  transition: color var(--transition-fast) var(--transition-ease-out);
}

.filter-section-header:hover {
  color: var(--color-primary);
}

.filter-section-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.filter-section-chevron {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--color-text-secondary);
  transition: transform var(--transition-base) var(--transition-ease-out);
}

.filter-section-header[aria-expanded="true"] .filter-section-chevron {
  transform: rotate(180deg);
}

.filter-section-content {
  padding-top: var(--spacing-sm);
  display: grid;
  gap: var(--spacing-md);
  animation: slideDown var(--transition-base) var(--transition-ease-out);
}

.filter-section-content[hidden] {
  display: none;
}

/* ===================================
   PRESET FILTERS (Quick Select)
   =================================== */

.filter-preset-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-sm);
}

.filter-preset-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast) var(--transition-ease-out);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  text-align: center;
}

.filter-preset-btn:hover {
  border-color: var(--color-primary);
  background: var(--color-surface-secondary);
}

.filter-preset-btn.active {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.filter-preset-count {
  font-size: var(--font-size-xs);
  opacity: 0.8;
}

/* ===================================
   FORM INPUTS (Inside Drawer)
   =================================== */

.filter-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xs);
}

.filter-select,
.filter-input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-family: var(--font-family);
  transition: all var(--transition-fast) var(--transition-ease-out);
}

.filter-select:focus,
.filter-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.filter-range-inputs {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.filter-range-inputs .filter-input {
  flex: 1;
}

.filter-range-separator {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.filter-checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  padding: var(--spacing-xs) 0;
  transition: color var(--transition-fast) var(--transition-ease-out);
}

.filter-checkbox-label:hover {
  color: var(--color-primary);
}

.filter-checkbox {
  width: 18px;
  height: 18px;
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast) var(--transition-ease-out);
}

.filter-checkbox:checked {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

/* ===================================
   BUTTONS
   =================================== */

.filter-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  font-family: var(--font-family);
  cursor: pointer;
  transition: all var(--transition-fast) var(--transition-ease-out);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
}

.filter-btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

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

.filter-btn-secondary {
  background: var(--color-surface-secondary);
  color: var(--color-text);
}

.filter-btn-secondary:hover {
  background: var(--color-surface-tertiary);
}

/* ===================================
   ANIMATIONS
   =================================== */

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */

@media (min-width: 640px) {
  .filter-search-header {
    padding: var(--spacing-md) var(--spacing-lg);
    height: var(--search-height-lg);
  }
  
  .filter-preset-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* NOTE: Removed orphaned selectors (Phase 2.3 cleanup)
   @media (min-width: 1024px) with .filter-fab and .filter-drawer
   These elements are not present in the HTML - no FAB or drawer implemented
*/

/* ===================================
   ACCESSIBILITY
   =================================== */

/* Focus visible for keyboard navigation */
.filter-search-input:focus-visible,
.filter-btn:focus-visible,
.filter-preset-btn:focus-visible,
.filter-select:focus-visible,
.filter-input:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
/* NOTE: Removed .filter-fab:focus-visible (Phase 2.3) - element not in HTML */

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .filter-chip,
  .filter-preset-btn,
  .filter-btn {
    border: 2px solid currentColor;
  }
}