/**
 * Advanced Portfolio Gallery - Filter System Styles
 * Complete styling for advanced filtering
 *
 * @package Advanced_Portfolio_Gallery
 * @version 2.5.0
 */

/* ==========================================================================
   CSS Variables & Defaults
   ========================================================================== */

.filter-container {
  --filter-bg: #0073aa;
  --filter-text: #ffffff;
  --filter-active-bg: #0073aa;
  --filter-hover-opacity: 0.85;
  --filter-transition: 0.3s ease;

  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  box-sizing: border-box;
}

.filter-container *,
.filter-container *::before,
.filter-container *::after {
  box-sizing: inherit;
}

/* ==========================================================================
   Filter Container Layout
   ========================================================================== */

.filter-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 30px;
}

/* Position Variations */
.filter-container--top .filter-buttons {
  justify-content: flex-start;
}

.filter-container--center .filter-buttons {
  justify-content: center;
}

.filter-container--right .filter-buttons {
  justify-content: flex-end;
}

/* ==========================================================================
   Filter Buttons - Base Style
   ========================================================================== */

.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 25px;
  border: 2px solid #ddd;
  background: #f5f5f5;
  color: #333;
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  border-radius: 25px;
  transition: all var(--filter-transition);
  line-height: 1.4;
  white-space: nowrap;
}

.filter-btn:hover,
.filter-btn:focus {
  background: #e8e8e8;
  border-color: #999;
  transform: translateY(-2px);
  outline: none;
}

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

.filter-btn--active:hover,
.filter-btn--active:focus {
  background: var(--filter-active-bg);
  color: var(--filter-text);
  border-color: var(--filter-active-bg);
  opacity: 0.9;
}

/* Color Dot Indicator */
.filter-color {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* Filter Count */
.filter-count {
  opacity: 0.7;
  font-size: 0.85em;
  margin-left: 2px;
}

/* ==========================================================================
   Filter Count - Hover Tooltip Style
   ========================================================================== */

.filter-container--count-hover .filter-btn {
  position: relative;
}

.filter-container--count-hover .filter-count {
  position: absolute;
  top: -8px;
  right: -8px;
  background: var(--filter-active-bg, #333);
  color: #fff;
  font-size: 0.7em;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 10px;
  min-width: 18px;
  text-align: center;
  opacity: 0;
  transform: scale(0.5) translateY(5px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  pointer-events: none;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
  margin-left: 0;
}

.filter-container--count-hover .filter-btn:hover .filter-count {
  opacity: 1;
  transform: scale(1) translateY(0);
}

/* ==========================================================================
   Filter Style Variations
   ========================================================================== */

/* Buttons (Default) - Already styled above */
.filter-container--buttons .filter-btn {
  border-radius: 25px;
}

/* Pills - Fully Rounded */
.filter-container--pills .filter-btn {
  border-radius: 50px;
  padding: 10px 24px;
}

/* Minimal - Text Only */
.filter-container--minimal .filter-btn {
  background: transparent !important;
  border: none !important;
  padding: 8px 16px;
  color: #64748b;
  font-weight: 500;
  border-radius: 0;
  box-shadow: none;
}

.filter-container--minimal .filter-btn:hover {
  color: var(--filter-bg);
  opacity: 1;
  transform: none;
}

.filter-container--minimal .filter-btn--active {
  color: var(--filter-bg);
  font-weight: 600;
  background: transparent !important;
}

/* Underline Style */
.filter-container--underline .filter-btn {
  background: transparent;
  color: #64748b;
  padding: 8px 16px;
  border-radius: 0;
  border: none;
  border-bottom: 2px solid transparent;
  transition: all 0.2s ease;
}

.filter-container--underline .filter-btn:hover {
  color: var(--filter-bg);
  background: transparent;
  opacity: 1;
  border-bottom-color: var(--filter-bg);
  transform: none;
}

.filter-container--underline .filter-btn--active {
  color: var(--filter-bg);
  background: transparent;
  border-bottom-color: var(--filter-bg);
  font-weight: 600;
}

/* Tabs Style */
.filter-container--tabs .filter-buttons {
  gap: 0;
  border-bottom: 2px solid #eee;
}

.filter-container--tabs .filter-btn {
  background: transparent;
  color: #64748b;
  padding: 12px 24px;
  border-radius: 0;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
}

.filter-container--tabs .filter-btn:hover {
  color: var(--filter-bg);
  background: #f8fafc;
  opacity: 1;
  transform: none;
}

.filter-container--tabs .filter-btn--active {
  color: var(--filter-bg);
  background: #f8fafc;
  border-bottom-color: var(--filter-bg);
  font-weight: 600;
}

/* ==========================================================================
   Hierarchical Filters
   ========================================================================== */

.filter-container--hierarchical .filter-group {
  display: inline-flex;
  flex-direction: column;
  gap: 6px;
}

.filter-btn--parent {
  font-weight: 600;
}

.filter-children {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-left: 20px;
  padding-left: 20px;
  border-left: 2px solid #e2e8f0;
}

.filter-btn--child {
  font-size: 13px;
  padding: 8px 16px;
  font-weight: 400;
}

/* ==========================================================================
   AND/OR Logic Toggle
   ========================================================================== */

.logic-toggle {
  display: inline-flex;
  gap: 0;
  background: #f1f5f9;
  border-radius: 6px;
  padding: 4px;
  margin-left: 10px;
}

.logic-btn {
  padding: 6px 14px;
  border: none;
  background: transparent;
  color: #64748b;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s ease;
}

.logic-btn:hover {
  background: rgba(255, 255, 255, 0.5);
  color: #334155;
}

.logic-btn--active {
  background: var(--filter-bg);
  color: var(--filter-text);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.logic-btn--active:hover {
  background: var(--filter-bg);
  color: var(--filter-text);
}

/* ==========================================================================
   Sidebar Layout
   ========================================================================== */

.filter-container--sidebar-left,
.filter-container--sidebar-right {
  display: flex;
  gap: 30px;
}

.filter-container--sidebar-right {
  flex-direction: row-reverse;
}

.filter-container--sidebar-left .filter-buttons,
.filter-container--sidebar-right .filter-buttons {
  flex-direction: column;
  flex-wrap: nowrap;
  flex-shrink: 0;
  width: 240px;
  margin-bottom: 0;
  padding: 16px;
  background: #f8fafc;
  border-radius: 12px;
  align-self: flex-start;
  position: sticky;
  top: 20px;
  max-height: calc(100vh - 40px);
  overflow-x: hidden;
  overflow-y: auto;
  gap: 6px;
}

/* Custom scrollbar for sidebar */
.filter-container--sidebar-left .filter-buttons::-webkit-scrollbar,
.filter-container--sidebar-right .filter-buttons::-webkit-scrollbar {
  width: 4px;
}

.filter-container--sidebar-left .filter-buttons::-webkit-scrollbar-track,
.filter-container--sidebar-right .filter-buttons::-webkit-scrollbar-track {
  background: transparent;
}

.filter-container--sidebar-left .filter-buttons::-webkit-scrollbar-thumb,
.filter-container--sidebar-right .filter-buttons::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 4px;
}

/* Sidebar filter buttons - vertical style */
.filter-container--sidebar-left .filter-btn,
.filter-container--sidebar-right .filter-btn {
  width: 100%;
  justify-content: flex-start;
  padding: 10px 14px;
  border-radius: 8px;
  text-align: left;
  font-size: 14px;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

/* Tablet */
@media (max-width: 1024px) {
  .filter-btn {
    padding: 8px 16px;
    font-size: 13px;
  }
  
  .filter-container--pills .filter-btn {
    padding: 8px 20px;
  }
}

/* Mobile - Collapse sidebar */
@media (max-width: 768px) {
  .filter-container--sidebar-left,
  .filter-container--sidebar-right {
    flex-direction: column;
  }

  .filter-container--sidebar-left .filter-buttons,
  .filter-container--sidebar-right .filter-buttons {
    width: 100%;
    flex-direction: row;
    flex-wrap: wrap;
    padding: 15px;
    position: static;
    max-height: none;
  }

  .filter-container--sidebar-left .filter-btn,
  .filter-container--sidebar-right .filter-btn {
    width: auto;
    padding: 8px 16px;
  }

  .filter-container--sidebar-left .filter-children,
  .filter-container--sidebar-right .filter-children {
    margin-left: 0;
    padding-left: 0;
    border-left: none;
    flex-direction: row;
    flex-wrap: wrap;
  }
  
  .filter-buttons {
    gap: 8px;
    margin-bottom: 20px;
  }
  
  .filter-btn {
    font-size: 12px;
    padding: 8px 15px;
    margin: 3px;
  }
}

/* Small mobile */
@media (max-width: 480px) {
  .filter-btn {
    font-size: 12px;
    padding: 6px 12px;
  }
  
  .filter-container--pills .filter-btn {
    padding: 6px 16px;
  }
  
  .logic-toggle {
    margin-left: 0;
    margin-top: 10px;
  }
  
  .filter-buttons {
    margin-bottom: 15px;
  }
}

/* ==========================================================================
   Animation & Transitions
   ========================================================================== */

.filter-btn {
  position: relative;
  overflow: hidden;
}

/* Ripple effect on click */
.filter-btn::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.filter-btn:active::after {
  width: 300px;
  height: 300px;
}

/* Smooth visibility transitions for filtered items */
.filter-visible {
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==========================================================================
   Accessibility
   ========================================================================== */

.filter-btn:focus-visible {
  outline: 2px solid var(--filter-bg);
  outline-offset: 2px;
}

.logic-btn:focus-visible {
  outline: 2px solid var(--filter-bg);
  outline-offset: 2px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .filter-btn,
  .logic-btn,
  .filter-count,
  .filter-visible {
    animation: none;
    transition: none;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .filter-btn {
    border: 2px solid currentColor;
  }
  
  .filter-btn--active {
    font-weight: 700;
  }
}