/*
 * GCO UI — Tab Primitive
 *
 * gco-ui-tabs owns only tab-list layout/composition.
 * gco-ui-tab owns the complete presentation of one tab:
 * regular, hover, selected/current, focus-visible, and disabled.
 *
 * Dual-host Composition Lab validation is required before production use.
 * No host modifier is introduced unless browser evidence proves one necessary.
 */

.gco-ui-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gco-ui-space-2);
  margin: 0;
  padding: 0;
}

.gco-ui-tab {
  --gco-ui-tab-regular-background: var(--gco-ui-color-surface-interactive-rest);
  --gco-ui-tab-regular-foreground: var(--gco-ui-text-on-dark);
  --gco-ui-tab-regular-border: var(--gco-ui-bg-dark-border);
  --gco-ui-tab-hover-background: color-mix(in srgb, var(--gco-ui-color-surface-interactive-rest) 75%, var(--gco-ui-color-white) 25%);
  --gco-ui-tab-hover-foreground: var(--gco-ui-text-on-dark);
  --gco-ui-tab-selected-background: var(--gco-ui-color-accent);
  --gco-ui-tab-selected-foreground: var(--gco-ui-text-on-light);
  --gco-ui-tab-selected-border: var(--gco-ui-bg-dark-border);
  --gco-ui-tab-disabled-opacity: 0.55;

  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  box-sizing: border-box;
  padding: var(--gco-ui-space-3) var(--gco-ui-space-4);
  font-family: var(--gco-ui-font-family);
  font-size: var(--gco-ui-font-size-2);
  font-weight: var(--gco-ui-font-weight-normal);
  line-height: var(--gco-ui-line-height);
  text-decoration: none;
  white-space: nowrap;
  background: var(--gco-ui-tab-regular-background);
  color: var(--gco-ui-tab-regular-foreground);
  border: 1px solid var(--gco-ui-tab-regular-border);
  border-bottom: 0;
  border-radius:
    var(--gco-ui-radius-3)
    var(--gco-ui-radius-3)
    0
    0;
  cursor: pointer;
}

.gco-ui-tab:hover:not(.gco-ui-tab--selected):not([aria-disabled="true"]):not(:disabled) {
  background: var(--gco-ui-tab-hover-background);
  color: var(--gco-ui-tab-hover-foreground);
  box-shadow: var(--gco-ui-interaction-hover-ring);
}

.gco-ui-tab--selected,
.gco-ui-tab[aria-current="page"] {
  position: relative;
  z-index: 2;
  background: var(--gco-ui-tab-selected-background);
  color: var(--gco-ui-tab-selected-foreground);
  border-color: var(--gco-ui-tab-selected-border);
  font-weight: var(--gco-ui-font-weight-bold);
}

.gco-ui-tab--selected:hover,
.gco-ui-tab[aria-current="page"]:hover {
  background: var(--gco-ui-tab-selected-background);
  color: var(--gco-ui-tab-selected-foreground);
  border-color: var(--gco-ui-tab-selected-border);
}

.gco-ui-tab:focus-visible {
  position: relative;
  z-index: 3;
  outline:
    var(--gco-ui-interaction-focus-ring-width)
    solid
    var(--gco-ui-interaction-focus-ring-color);
  outline-offset: var(--gco-ui-interaction-focus-ring-offset);
}

.gco-ui-tab[aria-disabled="true"],
.gco-ui-tab:disabled {
  opacity: var(--gco-ui-tab-disabled-opacity);
  cursor: default;
  pointer-events: none;
}

.gco-ui-tab[aria-disabled="true"]:hover,
.gco-ui-tab:disabled:hover {
  box-shadow: none;
}