/**
 * Portfolio Filters & Search - Enhanced Design
 * Theme-specific styling for filter buttons and search bar
 * Elevates visual quality with distinctive aesthetics for each theme
 */

/* ============================================================================
   BASE STRUCTURE - All Themes
   ============================================================================ */

/* Filters section container */
.portfolio-filters {
  padding: var(--space-12) 0;
  position: relative;
  z-index: 10;
  overflow: hidden;
}

/* Main wrapper - flexible layout */
.filters-wrapper {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  align-items: center;
  width: 100%;
  max-width: 100%;
}

/* Category filters container */
.category-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
  align-items: center;
  max-width: 900px;
  width: 100%;
}

/* Filter button base structure */
.filter-btn {
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: all var(--transition-base);
  background: transparent;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.filter-btn .badge {
  font-size: var(--text-xs);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-weight: var(--font-bold);
  line-height: 1;
  min-width: 20px;
  text-align: center;
}

/* Search box container */
.search-box {
  width: 100%;
  max-width: 400px;
}

/* Search form */
.search-form {
  display: flex;
  gap: var(--space-2);
  position: relative;
}

/* Search input base */
.search-input {
  flex: 1;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  transition: all var(--transition-base);
  min-height: 48px;
}

.search-input::placeholder {
  opacity: 0.6;
}

/* Search button base */
.search-btn {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  cursor: pointer;
  transition: all var(--transition-base);
  flex-shrink: 0;
}

.search-btn .icon {
  display: flex;
  align-items: center;
  justify-content: center;
}


/* ============================================================================
   MODERN THEME - Refined Minimalism
   ============================================================================ */

/* Modern: Segmented pill buttons with subtle elevation */
.theme-modern .filter-btn {
  background: linear-gradient(
    135deg,
    var(--color-surface) 0%,
    color-mix(in srgb, var(--color-surface) 95%, var(--color-primary) 5%) 100%
  );
  border-color: var(--color-border);
  color: var(--color-text);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.theme-modern .filter-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.05),
    transparent
  );
  pointer-events: none;
}

.theme-modern .filter-btn:hover {
  transform: translateY(-2px);
  border-color: var(--color-primary);
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--color-surface) 100%, var(--color-primary) 8%),
    color-mix(in srgb, var(--color-surface) 95%, var(--color-primary) 10%)
  );
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

.theme-modern .filter-btn.active {
  background: linear-gradient(
    135deg,
    var(--color-primary) 0%,
    color-mix(in srgb, var(--color-primary) 90%, var(--color-accent) 10%) 100%
  );
  border-color: var(--color-primary);
  color: var(--color-primary-text);
  box-shadow:
    0 4px 16px var(--color-primary-glow),
    0 2px 8px rgba(0, 0, 0, 0.15);
}

.theme-modern .filter-btn.active .badge {
  background: rgba(255, 255, 255, 0.25);
  color: var(--color-primary-text);
}

.theme-modern .filter-btn:not(.active) .badge {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

/* Modern: Glass-like search input */
.theme-modern .search-input {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

.theme-modern .search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  background: color-mix(in srgb, var(--color-surface) 98%, var(--color-primary) 2%);
  box-shadow:
    0 0 0 4px var(--color-primary-light),
    inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

.theme-modern .search-btn {
  background: linear-gradient(
    135deg,
    var(--color-primary),
    color-mix(in srgb, var(--color-primary) 85%, var(--color-accent) 15%)
  );
  border-color: var(--color-primary);
  color: var(--color-primary-text);
  box-shadow: 0 4px 12px var(--color-primary-glow);
}

.theme-modern .search-btn:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 6px 16px var(--color-primary-glow);
}

.theme-modern .search-btn:active {
  transform: translateY(-1px) scale(1);
}


/* ============================================================================
   CREATIVE THEME - Bold Gradient Flow
   ============================================================================ */

/* Creative: Vibrant gradient pill buttons */
.theme-creative .filter-btn {
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--color-surface) 100%, var(--color-primary) 10%),
    color-mix(in srgb, var(--color-surface) 95%, var(--color-secondary) 8%)
  );
  border: 2px solid color-mix(in srgb, var(--color-primary) 40%, var(--color-border) 60%);
  color: var(--color-text);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  position: relative;
}

/* Gradient shimmer effect */
.theme-creative .filter-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(
    120deg,
    transparent 0%,
    rgba(255, 255, 255, 0.1) 45%,
    rgba(255, 255, 255, 0.2) 50%,
    rgba(255, 255, 255, 0.1) 55%,
    transparent 100%
  );
  background-size: 200% 100%;
  background-position: 100% 0;
  transition: background-position 0.6s ease;
  pointer-events: none;
  opacity: 0;
}

.theme-creative .filter-btn:hover::after {
  opacity: 1;
  background-position: -100% 0;
}

.theme-creative .filter-btn:hover {
  transform: translateY(-4px) scale(1.03);
  border-color: var(--color-primary);
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--color-surface) 100%, var(--color-primary) 15%),
    color-mix(in srgb, var(--color-surface) 90%, var(--color-accent) 12%)
  );
  box-shadow:
    0 8px 24px rgba(0, 0, 0, 0.2),
    0 0 20px var(--color-primary-glow);
}

.theme-creative .filter-btn.active {
  background: linear-gradient(
    135deg,
    var(--color-primary) 0%,
    var(--color-accent) 50%,
    var(--color-secondary) 100%
  );
  border-color: var(--color-accent);
  color: var(--color-primary-text);
  box-shadow:
    0 8px 24px var(--color-primary-glow),
    0 0 30px var(--color-accent-glow);
  animation: pulse-button 3s ease-in-out infinite;
}

@keyframes pulse-button {
  0%, 100% {
    box-shadow:
      0 8px 24px var(--color-primary-glow),
      0 0 30px var(--color-accent-glow);
  }
  50% {
    box-shadow:
      0 8px 32px var(--color-primary-glow),
      0 0 40px var(--color-accent-glow);
  }
}

.theme-creative .filter-btn.active .badge {
  background: rgba(255, 255, 255, 0.3);
  color: var(--color-primary-text);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.theme-creative .filter-btn:not(.active) .badge {
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-accent)
  );
  color: var(--color-primary-text);
  box-shadow: 0 2px 6px var(--color-primary-glow);
}

/* Creative: Animated gradient search bar */
.theme-creative .search-input {
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--color-surface) 100%, var(--color-primary) 8%),
    color-mix(in srgb, var(--color-surface) 95%, var(--color-secondary) 5%)
  );
  border: 2px solid color-mix(in srgb, var(--color-primary) 40%, var(--color-border) 60%);
  color: var(--color-text);
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.1);
}

.theme-creative .search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--color-surface) 100%, var(--color-primary) 12%),
    color-mix(in srgb, var(--color-surface) 90%, var(--color-accent) 10%)
  );
  box-shadow:
    0 0 0 4px var(--color-primary-light),
    0 0 24px var(--color-primary-glow),
    inset 0 2px 8px rgba(0, 0, 0, 0.1);
  transform: translateY(-2px);
}

.theme-creative .search-btn {
  background: linear-gradient(
    135deg,
    var(--color-primary) 0%,
    var(--color-accent) 50%,
    var(--color-secondary) 100%
  );
  border-color: var(--color-accent);
  color: var(--color-primary-text);
  box-shadow:
    0 6px 16px var(--color-primary-glow),
    0 0 24px var(--color-accent-glow);
  animation: search-glow 3s ease-in-out infinite;
}

@keyframes search-glow {
  0%, 100% {
    box-shadow:
      0 6px 16px var(--color-primary-glow),
      0 0 24px var(--color-accent-glow);
  }
  50% {
    box-shadow:
      0 6px 20px var(--color-primary-glow),
      0 0 32px var(--color-accent-glow);
  }
}

.theme-creative .search-btn:hover {
  transform: translateY(-4px) scale(1.08) rotate(5deg);
  box-shadow:
    0 8px 24px var(--color-primary-glow),
    0 0 40px var(--color-accent-glow);
}

.theme-creative .search-btn:active {
  transform: translateY(-2px) scale(1) rotate(0deg);
}


/* ============================================================================
   3D THEME - Glass Depth & Neon Accents
   ============================================================================ */

/* 3D: Frosted glass pill buttons with depth */
.theme-threed .filter-btn {
  background: linear-gradient(
    135deg,
    rgba(var(--color-surface-rgb), 0.9),
    rgba(var(--color-surface-rgb), 0.75)
  );
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 2px solid color-mix(in srgb, var(--color-primary) 40%, transparent 60%);
  color: var(--color-text);
  box-shadow:
    0 8px 24px rgba(0, 0, 0, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.1),
    inset 0 -1px 0 rgba(0, 0, 0, 0.2);
  position: relative;
}

/* Glass reflection */
.theme-threed .filter-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 50%;
  border-radius: var(--radius-full) var(--radius-full) 0 0;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.12),
    transparent
  );
  pointer-events: none;
}

/* Neon glow outline */
.theme-threed .filter-btn::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: inherit;
  background: var(--color-accent);
  opacity: 0;
  filter: blur(12px);
  z-index: -1;
  transition: opacity var(--transition-base);
}

.theme-threed .filter-btn:hover {
  transform: perspective(1000px) translateY(-6px) rotateX(5deg);
  border-color: var(--color-accent);
  box-shadow:
    0 12px 40px rgba(0, 0, 0, 0.3),
    0 0 40px var(--color-accent-glow),
    inset 0 2px 0 rgba(255, 255, 255, 0.15),
    inset 0 -2px 0 rgba(0, 0, 0, 0.3);
}

.theme-threed .filter-btn:hover::after {
  opacity: 0.5;
}

.theme-threed .filter-btn.active {
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-accent)
  );
  border: 2px solid var(--color-accent);
  color: var(--color-background);
  box-shadow:
    0 12px 40px rgba(0, 0, 0, 0.3),
    0 0 60px var(--color-accent-glow),
    0 0 80px var(--color-primary-glow),
    inset 0 2px 0 rgba(255, 255, 255, 0.3),
    inset 0 -2px 0 rgba(0, 0, 0, 0.3);
  text-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

.theme-threed .filter-btn.active::after {
  opacity: 0.8;
  animation: neon-pulse-filter 2s ease-in-out infinite;
}

@keyframes neon-pulse-filter {
  0%, 100% {
    opacity: 0.6;
    filter: blur(12px);
  }
  50% {
    opacity: 1;
    filter: blur(16px);
  }
}

.theme-threed .filter-btn.active .badge {
  background: rgba(255, 255, 255, 0.25);
  color: var(--color-primary-text);
  box-shadow:
    0 2px 8px rgba(0, 0, 0, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.theme-threed .filter-btn:not(.active) .badge {
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-accent)
  );
  color: var(--color-background);
  box-shadow:
    0 2px 8px rgba(0, 0, 0, 0.2),
    0 0 12px var(--color-accent-glow);
}

/* 3D: Holographic search bar */
.theme-threed .search-input {
  background: linear-gradient(
    135deg,
    rgba(var(--color-surface-rgb), 0.85),
    rgba(var(--color-surface-rgb), 0.7)
  );
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 2px solid color-mix(in srgb, var(--color-accent) 40%, transparent 60%);
  color: var(--color-text);
  box-shadow:
    inset 0 2px 8px rgba(0, 0, 0, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.theme-threed .search-input:focus {
  outline: none;
  border-color: var(--color-accent);
  background: linear-gradient(
    135deg,
    rgba(var(--color-surface-rgb), 0.95),
    rgba(var(--color-surface-rgb), 0.85)
  );
  box-shadow:
    0 0 0 4px color-mix(in srgb, var(--color-accent) 20%, transparent 80%),
    0 0 40px var(--color-accent-glow),
    inset 0 2px 8px rgba(0, 0, 0, 0.2),
    inset 0 2px 0 rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}

.theme-threed .search-btn {
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-accent)
  );
  border: 2px solid var(--color-accent);
  color: var(--color-background);
  box-shadow:
    0 8px 24px rgba(0, 0, 0, 0.3),
    0 0 40px var(--color-accent-glow),
    0 0 60px var(--color-primary-glow),
    inset 0 2px 0 rgba(255, 255, 255, 0.3),
    inset 0 -2px 0 rgba(0, 0, 0, 0.3);
  text-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
  position: relative;
}

/* Holographic shimmer on search button */
.theme-threed .search-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(
    45deg,
    transparent 30%,
    rgba(255, 255, 255, 0.3) 50%,
    transparent 70%
  );
  background-size: 200% 200%;
  animation: hologram-sweep 3s linear infinite;
  pointer-events: none;
}

@keyframes hologram-sweep {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 200% 50%;
  }
}

/* Neon pulse halo */
.theme-threed .search-btn::after {
  content: '';
  position: absolute;
  inset: -6px;
  border-radius: inherit;
  background: var(--color-accent);
  opacity: 0.5;
  filter: blur(20px);
  z-index: -1;
  animation: neon-halo 2s ease-in-out infinite;
}

@keyframes neon-halo {
  0%, 100% {
    opacity: 0.5;
    filter: blur(20px);
  }
  50% {
    opacity: 0.8;
    filter: blur(24px);
  }
}

.theme-threed .search-btn:hover {
  transform: perspective(1000px) translateY(-6px) translateZ(10px) rotateX(5deg);
  box-shadow:
    0 12px 40px rgba(0, 0, 0, 0.4),
    0 0 60px var(--color-accent-glow),
    0 0 80px var(--color-primary-glow),
    inset 0 3px 0 rgba(255, 255, 255, 0.4);
}

.theme-threed .search-btn:active {
  transform: perspective(1000px) translateY(-4px) translateZ(5px);
}


/* ============================================================================
   RESPONSIVE LAYOUT
   ============================================================================ */

@media (max-width: 768px) {
  .filters-wrapper {
    gap: var(--space-4);
  }

  .category-filters {
    gap: var(--space-2);
    justify-content: center;
    flex-wrap: wrap;
    max-width: 100%;
  }

  .filter-btn {
    padding: var(--space-2) var(--space-3);
    font-size: 0.75rem;
    min-height: 44px;
  }

  .filter-btn .badge {
    font-size: 9px;
    padding: 2px 5px;
  }

  .search-box {
    max-width: 100%;
  }

  .search-input {
    font-size: var(--text-sm);
  }

  /* Simplify animations on mobile */
  .theme-creative .filter-btn:hover,
  .theme-threed .filter-btn:hover {
    transform: translateY(-2px);
  }

  .theme-creative .search-btn:hover,
  .theme-threed .search-btn:hover {
    transform: translateY(-2px) scale(1.05);
  }

  /* Disable complex animations */
  .theme-creative .filter-btn.active,
  .theme-creative .search-btn {
    animation: none;
  }

  .theme-threed .filter-btn.active::after,
  .theme-threed .search-btn::before,
  .theme-threed .search-btn::after {
    animation: none;
  }
}

/* Even smaller on very small screens */
@media (max-width: 480px) {
  .filter-btn {
    padding: var(--space-1) var(--space-2);
    font-size: 0.7rem;
    min-height: 40px;
  }

  .filter-btn .badge {
    font-size: 8px;
    padding: 1px 4px;
    min-width: 16px;
  }
}

/* Accessibility - reduced motion */
@media (prefers-reduced-motion: reduce) {
  .filter-btn,
  .search-input,
  .search-btn,
  .filter-btn::after,
  .search-btn::before,
  .search-btn::after {
    animation: none !important;
    transition: none !important;
  }

  .theme-creative .filter-btn:hover,
  .theme-creative .search-btn:hover,
  .theme-threed .filter-btn:hover,
  .theme-threed .search-btn:hover {
    transform: none !important;
  }
}