/* ============================================================
   Horizontal Pill Scroller Component
   Touch-friendly horizontal scrolling navigation with pills
   ============================================================ */

/* Container */
.pill-scroller {
  position: relative;
  width: 100%;
  margin: var(--space-1) 0;
}

/* Scroll container */
.pill-scroller__track {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  overflow-y: hidden;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none; /* Firefox */
  padding: var(--space-2) var(--space-1);
  margin: calc(-1 * var(--space-2)) calc(-1 * var(--space-1));
}

.pill-scroller__track::-webkit-scrollbar {
  display: none; /* Chrome, Safari */
}

/* Fade edges for scroll indication */
.pill-scroller--fade-left::before,
.pill-scroller--fade-right::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 32px;
  pointer-events: none;
  z-index: 1;
  transition: opacity var(--transition-base);
}

.pill-scroller--fade-left::before {
  left: 0;
  background: linear-gradient(to right, var(--color-bg-page), transparent);
}

.pill-scroller--fade-right::after {
  right: 0;
  background: linear-gradient(to left, var(--color-bg-page), transparent);
}

/* Card variant - white background */
.pill-scroller--card-bg::before {
  background: linear-gradient(to right, var(--color-bg-card), transparent);
}

.pill-scroller--card-bg::after {
  background: linear-gradient(to left, var(--color-bg-card), transparent);
}

/* Base pill styles */
.pill-scroller__pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  min-height: var(--touch-target-min);
  min-width: fit-content;
  white-space: nowrap;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition:
    background-color var(--transition-base),
    color var(--transition-base),
    border-color var(--transition-base),
    box-shadow var(--transition-base),
    transform var(--transition-fast);
  flex-shrink: 0;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.pill-scroller__pill:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.pill-scroller__pill:active {
  transform: scale(0.97);
}

/* Default pill variant */
.pill-scroller__pill--default {
  background: var(--color-bg);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.pill-scroller__pill--default:hover {
  background: var(--color-bg-hover);
  border-color: var(--color-border-hover);
  color: var(--color-text);
}

.pill-scroller__pill--default.pill-scroller__pill--active {
  background: var(--color-primary-bg);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Custom color variant - for themed pills */
.pill-scroller__pill--custom {
  background: var(--pill-bg, var(--color-bg-muted));
  color: var(--pill-text, var(--color-text-secondary));
  border: 1px solid var(--pill-border, transparent);
}

.pill-scroller__pill--custom:hover {
  filter: brightness(0.95);
}

.pill-scroller__pill--custom.pill-scroller__pill--active {
  box-shadow: inset 0 0 0 2px var(--pill-text, var(--color-primary));
}

/* "View All" special pill */
.pill-scroller__pill--view-all {
  background: transparent;
  color: var(--color-primary);
  border: 1px dashed var(--color-primary);
}

.pill-scroller__pill--view-all:hover {
  background: var(--color-primary-subtle);
  border-style: solid;
}

/* Pill with count badge */
.pill-scroller__count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 var(--space-1);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  background: var(--color-bg-muted);
  color: var(--color-text-muted);
}

.pill-scroller__pill--active .pill-scroller__count {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
}

.pill-scroller__pill--custom .pill-scroller__count {
  background: rgba(0, 0, 0, 0.1);
  color: inherit;
}

/* Pill with icon */
.pill-scroller__icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* Section label (for grouped pills) */
.pill-scroller__label {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  margin-bottom: var(--space-2);
}

/* Loading state */
.pill-scroller--loading .pill-scroller__track {
  opacity: 0.5;
  pointer-events: none;
}

.pill-scroller__skeleton {
  display: flex;
  gap: var(--space-2);
}

.pill-scroller__skeleton-pill {
  width: 80px;
  height: var(--touch-target-min);
  border-radius: var(--radius-full);
  background: var(--color-bg-muted);
  animation: pill-skeleton-pulse 1.5s ease-in-out infinite;
}

.pill-scroller__skeleton-pill:nth-child(2) {
  width: 100px;
  animation-delay: 0.1s;
}

.pill-scroller__skeleton-pill:nth-child(3) {
  width: 70px;
  animation-delay: 0.2s;
}

.pill-scroller__skeleton-pill:nth-child(4) {
  width: 90px;
  animation-delay: 0.3s;
}

@keyframes pill-skeleton-pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* ============================================================
   Mobile Responsive
   ============================================================ */

@media (max-width: 768px) {
  .pill-scroller {
    margin: var(--space-1) 0;
  }

  .pill-scroller__track {
    gap: var(--space-2);
    /* Allow pills to extend past container on mobile */
    padding-left: var(--mobile-padding);
    padding-right: var(--mobile-padding);
    margin-left: calc(-1 * var(--mobile-padding));
    margin-right: calc(-1 * var(--mobile-padding));
    width: calc(100% + 2 * var(--mobile-padding));
  }

  .pill-scroller__pill {
    font-size: var(--text-sm);
    padding: var(--space-2) var(--space-3);
  }

  /* Wider fade edges on mobile */
  .pill-scroller--fade-left::before,
  .pill-scroller--fade-right::after {
    width: 24px;
  }

  .pill-scroller--fade-left::before {
    left: 0;
    background: linear-gradient(to right, var(--color-bg-page) 30%, transparent);
  }

  .pill-scroller--fade-right::after {
    right: 0;
    background: linear-gradient(to left, var(--color-bg-page) 30%, transparent);
  }
}

@media (max-width: 480px) {
  .pill-scroller__pill {
    /* Ensure proper touch targets on small screens */
    min-height: var(--touch-target-min);
    padding: var(--space-2-5) var(--space-3);
  }
}

/* ============================================================
   Dark Mode Adjustments
   ============================================================ */

[data-theme="dark"] .pill-scroller--fade-left::before {
  background: linear-gradient(to right, var(--color-bg-page), transparent);
}

[data-theme="dark"] .pill-scroller--fade-right::after {
  background: linear-gradient(to left, var(--color-bg-page), transparent);
}

[data-theme="dark"] .pill-scroller--card-bg::before {
  background: linear-gradient(to right, var(--color-bg-card), transparent);
}

[data-theme="dark"] .pill-scroller--card-bg::after {
  background: linear-gradient(to left, var(--color-bg-card), transparent);
}

[data-theme="dark"] .pill-scroller__pill--custom:hover {
  filter: brightness(1.1);
}