/* Structural CSS for the combobox enhancement. No Bootstrap JS dependency.
   Tune appearance through the --cb-* variables below; defaults are neutral and
   Bootstrap-compatible. Markup stays framework-agnostic. */

:root {
  --cb-bg: #fff;
  --cb-color: #212529;
  --cb-border-color: #adb5bd;
  --cb-border-radius: 0.375rem;
  --cb-focus-color: #0d6efd;
  --cb-chip-bg: #e9ecef;
  --cb-chip-color: inherit;
  --cb-chip-border-color: transparent;
  --cb-chip-border-width: 0px;
  --cb-chip-font-size: 0.875em;
  --cb-chip-border-radius: 0.4286em;
  --cb-picker-bg: Canvas;
  --cb-option-active-bg: #0d6efd;
  --cb-option-selected-bg: #e9ecef;
  --cb-muted-color: #6c757d;
  --cb-error-color: #dc3545;
  --cb-control-height: 2.75rem;
  --cb-option-min-height: 2.5rem;
  --cb-check-size: 1em;
}

.cb-source-hidden {
  position: absolute !important;
  inline-size: 1px !important;
  block-size: 1px !important;
  margin: -1px !important;
  padding: 0 !important;
  overflow: hidden !important;
  clip: rect(0 0 0 0) !important;
  clip-path: inset(50%) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* ------------------------------------------------------------------------- */
/* Control geometry — single, multiple and input comboboxes share one system */
/* ------------------------------------------------------------------------- */

.cb-control,
.cb-text-control,
.cb-fallback-input,
.cb-fallback-add {
  box-sizing: border-box;
  min-block-size: var(--cb-control-height);
  border: 1px solid var(--cb-border-color);
  border-radius: var(--cb-border-radius);
  background: var(--cb-bg);
  color: var(--cb-color);
  font: inherit;
}

.cb-text-control,
.cb-fallback-input {
  display: block;
  inline-size: 100%;
  max-inline-size: 100%;
  padding-block: calc((var(--cb-control-height) - 1.625rem) / 2);
  padding-inline: 0.75rem;
}

.cb-text-control:disabled {
  cursor: not-allowed;
}

.cb-control {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.375rem;
  min-inline-size: 0;
  max-inline-size: 100%;
  padding-block: 0.375rem;
  padding-inline: 0.5rem;
  cursor: text;
}

.cb-control-single {
  flex-wrap: nowrap;
  padding-block: 0;
  padding-inline: 0.75rem;
}

.cb-control:hover,
.cb-text-control:hover {
  border-color: #9aa3ad;
}

/* Chips participate directly in the control flex layout so the inter-item gap
   is identical everywhere (including before the search field). */
.cb-chips {
  display: contents;
}

.cb-chips:empty {
  display: none;
}

/* The search input disappears into the control */
.cb-input {
  flex: 1 1 4ch;
  min-inline-size: 4ch;
  max-inline-size: 100%;
  inline-size: auto;
  border: 0;
  outline: 0;
  margin: 0;
  padding: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  text-overflow: ellipsis;
}

.cb-control-single .cb-input {
  flex-basis: 100%;
  min-inline-size: 0;
}

.cb-input::placeholder,
.cb-text-control::placeholder,
.cb-fallback-input::placeholder {
  color: var(--cb-muted-color);
  opacity: 1;
}

/* ------------------------------------------------------------------------- */
/* Chips                                                                    */
/* ------------------------------------------------------------------------- */

.cb-chip {
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  gap: 0.2857em;
  flex: 0 1 auto;
  min-inline-size: 0;
  min-block-size: 1.7143em;
  max-inline-size: 100%;
  padding-block: 0;
  padding-inline-start: 0.5714em;
  padding-inline-end: 0.1429em;
  border: var(--cb-chip-border-width) solid var(--cb-chip-border-color);
  border-radius: var(--cb-chip-border-radius);
  background: var(--cb-chip-bg);
  color: var(--cb-chip-color);
  font-size: var(--cb-chip-font-size);
  line-height: 1.4;
}

.cb-chip-label {
  flex: 1 1 auto;
  min-inline-size: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cb-chip .cb-chip-remove {
  appearance: none;
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  inline-size: 1.4286em;
  block-size: 1.4286em;
  margin-inline-start: 0;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: inherit;
  font: inherit;
  cursor: pointer;
}

.cb-chip .cb-chip-remove > svg {
  inline-size: 1em;
  block-size: 1em;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
}

@supports (color: color-mix(in srgb, red 50%, blue)) {
  .cb-chip .cb-chip-remove:hover,
  .cb-chip .cb-chip-remove:focus-visible {
    background: color-mix(in srgb, currentColor 12%, transparent);
  }
}

@supports not (color: color-mix(in srgb, red 50%, blue)) {
  .cb-chip .cb-chip-remove:hover,
  .cb-chip .cb-chip-remove:focus-visible {
    background: rgb(0 0 0 / 0.08);
  }
}

.cb-chip:focus-visible {
  outline: 2px solid var(--cb-focus-color);
  outline-offset: 1px;
}

/* ------------------------------------------------------------------------- */
/* Focus — whole control, no ring around the internal input                 */
/* ------------------------------------------------------------------------- */

.cb-text-control:focus,
.cb-control:focus-within {
  border-color: var(--cb-focus-color);
  outline: 2px solid rgb(13 110 253 / 0.35);
  outline-offset: 2px;
}

@supports (color: color-mix(in srgb, red 50%, blue)) {
  .cb-text-control:focus,
  .cb-control:focus-within {
    outline-color: color-mix(in srgb, var(--cb-focus-color) 40%, transparent);
  }
}

@supports not (color: color-mix(in srgb, red 50%, blue)) {
  .cb-text-control:focus,
  .cb-control:focus-within {
    outline-color: var(--cb-focus-color);
  }
}

.cb-fallback-input:focus {
  border-color: var(--cb-focus-color);
}

/* Open state reflection without a parallel JS state model */
.cb-control:has([aria-expanded="true"]) {
  border-color: var(--cb-focus-color);
}

/* ------------------------------------------------------------------------- */
/* Picker / popover — natural continuation of the control                   */
/* ------------------------------------------------------------------------- */

.cb-popover {
  box-sizing: border-box;
  inset: auto;
  margin: 0.25rem 0;
  position: fixed;
  position-area: bottom;
  position-try: flip-block;
  position-try-fallbacks: flip-block;
  inline-size: anchor-size(width);
  max-block-size: min(20rem, 50vh);
  padding: 0.25rem;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  border: 1px solid var(--cb-border-color);
  border-radius: var(--cb-border-radius);
  background: var(--cb-picker-bg);
  color: var(--cb-color);
  box-shadow: 0 0.5rem 1rem rgb(0 0 0 / 15%);
}

.cb-popover::backdrop {
  background: transparent;
}

.cb-listbox {
  display: grid;
  min-inline-size: 0;
  gap: 0.125rem;
}

/* ------------------------------------------------------------------------- */
/* Options — stable geometry, active vs selected distinctly                  */
/* ------------------------------------------------------------------------- */

.cb-option,
.cb-empty,
.cb-group {
  box-sizing: border-box;
  inline-size: 100%;
  min-inline-size: 0;
  padding-block: 0.5rem;
  padding-inline: 0.6rem;
}

.cb-option,
.cb-empty {
  min-block-size: var(--cb-option-min-height);
  border-radius: 0.25rem;
}

.cb-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75em;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: start;
  cursor: pointer;
  user-select: none;
}

.cb-option-label {
  flex: 1 1 auto;
  min-inline-size: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cb-option:is(:hover, [data-active]) {
  background: var(--cb-option-active-bg);
  color: #fff;
}

.cb-option[aria-selected="true"] {
  background: var(--cb-option-selected-bg);
}

.cb-option[aria-selected="true"]::after {
  content: "";
  flex: 0 0 auto;
  inline-size: var(--cb-check-size);
  block-size: var(--cb-check-size);
  margin-inline-start: auto;
  background: currentColor;
  -webkit-mask:
    url("data:image/svg+xml,%3Csvg%20viewBox='0%200%2024%2024'%20xmlns='http://www.w3.org/2000/svg'%3E%3Cpath%20d='M5%2012l4%204L19%206'%20fill='none'%20stroke='%23000'%20stroke-width='2.25'%20stroke-linecap='round'%20stroke-linejoin='round'/%3E%3C/svg%3E")
    center / contain no-repeat;
  mask:
    url("data:image/svg+xml,%3Csvg%20viewBox='0%200%2024%2024'%20xmlns='http://www.w3.org/2000/svg'%3E%3Cpath%20d='M5%2012l4%204L19%206'%20fill='none'%20stroke='%23000'%20stroke-width='2.25'%20stroke-linecap='round'%20stroke-linejoin='round'/%3E%3C/svg%3E")
    center / contain no-repeat;
}

.cb-option[aria-selected="true"]:is(:hover, [data-active]) {
  background: var(--cb-option-active-bg);
  color: #fff;
}

.cb-option[aria-disabled="true"],
.cb-option[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
}

/* ------------------------------------------------------------------------- */
/* Empty / loading / error / create states — treated as real picker rows     */
/* ------------------------------------------------------------------------- */

.cb-empty {
  display: flex;
  align-items: center;
  color: var(--cb-muted-color);
  overflow-wrap: anywhere;
}

.cb-empty.cb-error {
  color: var(--cb-error-color);
}

.cb-group {
  color: var(--cb-muted-color);
  font-size: 0.875em;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cb-create {
  font-style: italic;
}

.cb-create .cb-option-label {
  color: var(--cb-focus-color);
}

.cb-status {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* ------------------------------------------------------------------------- */
/* States reflected from the native source                                  */
/* ------------------------------------------------------------------------- */

.cb-text-control[aria-invalid="true"],
.cb-control:has([aria-invalid="true"]) {
  border-color: var(--cb-error-color);
}

.cb-text-control[aria-invalid="true"]:focus,
.cb-control:has([aria-invalid="true"]):focus-within {
  outline-color: var(--cb-error-color);
}

.cb-control:has(.cb-input:disabled) {
  opacity: 0.65;
  cursor: not-allowed;
}

.cb-input:read-only,
.cb-input:disabled {
  cursor: default;
}

/* ------------------------------------------------------------------------- */
/* Fallback creation control — same system, no second engine                 */
/* ------------------------------------------------------------------------- */

.cb-fallback-create {
  display: flex;
  gap: 0.5rem;
  margin-block-start: 0.5rem;
}

.cb-fallback-input {
  flex: 1 1 auto;
}

.cb-fallback-add {
  flex: 0 0 auto;
  padding-inline: 0.875rem;
  cursor: pointer;
}

.cb-fallback-add:hover {
  border-color: var(--cb-focus-color);
}

/* The custom element is an enhancement/lifecycle boundary, not a shadow tree. */
combo-box {
  display: block;
  min-inline-size: 0;
}