/**
 * Tabs Bar Plugin - Styles
 *
 * Variants:
 *   - default: Horizontal tabs with border styling
 *   - numbered: Pill buttons with number + label
 *   - steps: Wizard-style with circles and connecting lines
 *   - chrome: Browser-like tabs (scroll, close buttons, reorder)
 *   - nav: Vertical text navigation
 *
 * Intensity themes:
 *   - tabs-bar-subtle.css: Professional, minimal
 *   - tabs-bar-medium.css: Balanced (default)
 *   - tabs-bar-bold.css: Vibrant, energetic
 */

/* ==========================================================================
   Tabs Bar Container
   ========================================================================== */

tabs-bar-fc {
  /* Intensity tokens (override via theme files) */
  --tab-active-bg: var(--bg-base);
  --tab-active-border: var(--accent);
  --tab-active-glow: none;
  --tab-hover-bg: var(--bg-hover);
  --tab-hover-border: var(--line-strong);
  --tab-drag-bg: var(--accent);
  --tab-drag-shadow: var(--shadow-md, 0 4px 16px rgba(0, 0, 0, 0.4));

  display: flex;
  gap: 2px;
  flex-direction: row;
  margin-left: 12px;
  margin-right: 12px;
  width: fit-content;
  position: relative;
  z-index: 2;
  /* Sit above content border */
}

tabs-bar-fc[data-direction="vertical"] {
  flex-direction: column;
  margin-left: 0;
}

tabs-bar-fc[data-layout="column"] {
  flex-direction: column;
  margin-left: 0;
}

/* Numbered variant - button grid style */
tabs-bar-fc[data-variant="numbered"] {
  margin-left: 0;
}

/* Steps variant - wizard style with connecting line */
tabs-bar-fc[data-variant="steps"] {
  align-items: flex-start;
  gap: 0;
  margin-left: 0;
}

tabs-bar-fc[data-variant="chrome"] {
  align-items: stretch;
  gap: 0;
  margin-left: 0;
  margin-right: 0;
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: thin;
  width: 100%;
}

/* ==========================================================================
   Tab Button - Default Variant
   ========================================================================== */

tab-button-fc {
  display: inline-flex;
  position: relative;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 120px;
  max-width: 220px;
  height: 40px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-bottom: none;
  border-radius: 8px 8px 0 0;
  color: var(--text-base);
  font-size: 0.7778rem;
  font-weight: 500;
  background-color: var(--bg-raised);
  cursor: pointer;
  user-select: none;
  transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease, box-shadow 0.2s ease;
}

tabs-bar-fc[data-variant="chrome"]>tab-button-fc {
  border-radius: 8px 8px 0 0;
  flex: 0 0 auto;
  gap: 10px;
  max-width: 220px;
  min-width: 120px;
  padding-right: 10px;
}

tabs-bar-fc[data-variant="chrome"]>tab-button-fc[data-dragging] {
  background: var(--tab-drag-bg);
  box-shadow: var(--tab-drag-shadow);
  opacity: 1;
  position: relative;
  transform-origin: center;
  z-index: 100;
}

tabs-bar-fc[data-variant="chrome"][data-reordering] {
  cursor: grabbing;
}

tabs-bar-fc[data-variant="chrome"][data-reordering] tab-button-fc:not([data-dragging]) {
  /* Other tabs get smooth transitions during drag */
  pointer-events: none;
}

tabs-bar-fc[data-variant="chrome"] tab-label {
  cursor: grab;
}

tabs-bar-fc[data-variant="chrome"] [data-tab-close] {
  appearance: none;
  background: transparent;
  border: 0;
  border-radius: 6px;
  color: var(--text-muted);
  cursor: pointer;
  flex: 0 0 auto;
  font: inherit;
  line-height: 1;
  padding: 4px 6px;
  transition: background 0.15s ease, color 0.15s ease;
}

tabs-bar-fc[data-variant="chrome"] [data-tab-close]:hover {
  background: var(--overlay-accent-10, rgba(139, 92, 246, 0.1));
  color: var(--text-bright);
}

tab-button-fc:hover {
  background: var(--tab-hover-bg);
  border-color: var(--tab-hover-border);
  color: var(--text-base);
}

tab-button-fc[data-active] {
  color: var(--text-bright);
  background: var(--tab-active-bg);
  border-color: var(--tab-active-border);
  border-bottom: 2px solid var(--tab-active-bg);
  box-shadow: var(--tab-active-glow);
  margin-bottom: -2px;
  z-index: 3;
}

tab-button-fc:focus {
  outline: none;
}

tab-button-fc:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring, 0 0 0 2px var(--bg-base), 0 0 0 4px var(--accent));
}

/* ==========================================================================
   Tab Button - Badge Support
   ========================================================================== */

tab-button-fc[data-badge] {
  padding-right: 28px;
}

tab-button-fc[data-badge]::after {
  content: attr(data-badge);
  position: absolute;
  top: 12px;
  right: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  box-sizing: border-box;
  border-radius: 999px;
  background: var(--accent);
  color: var(--text-bright);
  font-size: 0.6111rem;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  overflow: hidden;
}

/* ==========================================================================
   Tab Button - Numbered Variant
   ========================================================================== */

tabs-bar-fc[data-variant="numbered"]>tab-button-fc {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  min-width: 60px;
  max-width: 80px;
  height: auto;
  padding: 16px 8px;
  border: 2px solid var(--line);
  border-radius: 6px;
  background-color: var(--bg-base);
}

tabs-bar-fc[data-variant="numbered"]>tab-button-fc:hover {
  border-color: var(--tab-hover-border);
  background: var(--tab-hover-bg);
}

tabs-bar-fc[data-variant="numbered"]>tab-button-fc[data-active] {
  border-color: var(--tab-active-border);
  background: var(--tab-active-bg);
  box-shadow: var(--tab-active-glow);
}

/* Number display elements */
tab-item-number {
  display: block;
  font-size: 1.5556rem;
  font-weight: 700;
  line-height: 1;
  transition: color 0.15s ease;
}

tab-item-label {
  display: block;
  font-size: 0.5556rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Number colors */
tabs-bar-fc[data-variant="numbered"]>tab-button-fc tab-item-number {
  color: var(--text-base);
}

tabs-bar-fc[data-variant="numbered"]>tab-button-fc:hover tab-item-number {
  color: var(--text-bright);
}

tabs-bar-fc[data-variant="numbered"]>tab-button-fc[data-active] tab-item-number {
  color: var(--accent);
}

/* ==========================================================================
   Tab Button - Steps Variant (Wizard)
   ========================================================================== */

tabs-bar-fc[data-variant="steps"]>tab-button-fc {
  flex-direction: column;
  background: transparent;
  border: none;
  height: auto;
  padding: 8px 16px;
  gap: 8px;
  color: var(--text-faint);
  min-width: auto;
  max-width: none;
  border-radius: 0;
  position: relative;
}

/* Connecting line segment from this circle to the next */
tabs-bar-fc[data-variant="steps"]>tab-button-fc:not(:last-child)::after {
  background: var(--line-strong, var(--bg-raised));
  content: "";
  height: 2px;
  left: calc(50% + 16px);
  position: absolute;
  right: -16px;
  top: 24px;
  z-index: 0;
}

tabs-bar-fc[data-variant="steps"]>tab-button-fc:hover {
  background: transparent;
  color: var(--text-muted);
}

tabs-bar-fc[data-variant="steps"]>tab-button-fc[data-active] {
  background: transparent;
  color: var(--text-base);
  border: none;
  box-shadow: none;
  margin-bottom: 0;
}

tabs-bar-fc[data-variant="steps"]>tab-button-fc[disabled] {
  cursor: not-allowed;
  pointer-events: none;
}

tabs-bar-fc[data-variant="steps"]>tab-button-fc[disabled] tab-button-label {
  opacity: 0.5;
}

/* Step number circle */
tab-button-number {
  align-items: center;
  background: var(--bg-surface);
  border: 2px solid var(--line);
  border-radius: 50%;
  color: var(--text-muted);
  display: flex;
  font-size: 0.875rem;
  font-weight: 600;
  height: 32px;
  justify-content: center;
  position: relative;
  transition: all 0.2s ease, box-shadow 0.2s ease;
  width: 32px;
  z-index: 1;
}

tabs-bar-fc[data-variant="steps"]>tab-button-fc tab-button-number {
  display: flex;
}

tabs-bar-fc[data-variant="steps"]>tab-button-fc[data-active] tab-button-number {
  background: var(--tab-active-border, var(--accent));
  border-color: var(--tab-active-border, var(--accent));
  box-shadow: var(--tab-active-glow, 0 0 0 4px var(--overlay-accent-10, rgba(139, 92, 246, 0.1)));
  color: white;
}

tabs-bar-fc[data-variant="steps"]>tab-button-fc.completed tab-button-number {
  background: var(--success);
  border-color: var(--success);
  color: white;
}

/* Step label */
tab-button-label {
  font-size: 0.75rem;
  font-weight: 500;
  text-align: center;
  white-space: nowrap;
}

tabs-bar-fc[data-variant="steps"]>tab-button-fc[data-active] tab-button-label {
  color: var(--tab-active-border, var(--accent));
  font-weight: 600;
}

tabs-bar-fc[data-variant="steps"]>tab-button-fc.completed tab-button-label {
  color: var(--success);
}

/* ==========================================================================
   Tab Label - Inline Editing Support
   ========================================================================== */

tab-label {
  flex: 1;
  text-align: center;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: pointer;
}

tab-button-fc.editing {
  user-select: text !important;
}

tab-button-fc.editing tab-label {
  cursor: text;
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
  padding: 2px 4px;
  background: var(--overlay-white-10, rgba(255, 255, 255, 0.1));
}

/* ==========================================================================
   Tab Content Container (Optional)
   ========================================================================== */

tabs-content {
  display: flex;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
  background: var(--bg-base);
  border: 1px solid var(--line);
  border-radius: 8px;
  margin-top: -1px;
}

tab-content {
  display: none;
  flex-direction: column;
  gap: 16px;
  flex: 1;
  min-height: 0;
  padding: 12px;
  overflow: auto;
}

tab-content[data-active] {
  display: flex;
}

/* ==========================================================================
   Tab Button - Nav Variant (Vertical Text Navigation)
   ========================================================================== */

tabs-bar-fc[data-variant="nav"] {
  flex-direction: column;
  gap: 2px;
  margin: 0;
  width: 100%;
}

tabs-bar-fc[data-variant="nav"] > tab-button-fc {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  min-width: 0;
  max-width: none;
  width: 100%;
  height: auto;
  padding: 10px 14px;
  border: 1px solid transparent;
  border-left: 2px solid transparent;
  border-radius: var(--radius-sm, 4px);
  background: transparent;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  text-align: left;
}

tabs-bar-fc[data-variant="nav"] > tab-button-fc:hover {
  background: var(--tab-hover-bg);
  color: var(--text-base);
}

tabs-bar-fc[data-variant="nav"] > tab-button-fc[data-active] {
  background: var(--tab-active-bg, var(--overlay-accent-10, rgba(139, 92, 246, 0.1)));
  border-left-color: var(--tab-active-border, var(--accent));
  color: var(--accent);
  box-shadow: var(--tab-active-glow);
  margin-bottom: 0;
}

/* ==========================================================================
   Reduced Motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  tab-button-fc {
    transition: none;
  }

  tab-button-number {
    transition: none;
  }
}