/* ══════════════════════════════════════════════
   rhx-tabs — Tab navigation component
   ══════════════════════════════════════════════ */

/* ── Tab Group container ── */
.rhx-tab-group {
    display: flex;
    flex-direction: column;
}

/* Placement modifiers */
.rhx-tab-group--bottom {
    flex-direction: column-reverse;
}

.rhx-tab-group--start {
    flex-direction: row;
}

.rhx-tab-group--end {
    flex-direction: row-reverse;
}

/* ── Nav (tablist) ── */
.rhx-tab-group__nav {
    display: flex;
    gap: var(--rhx-space-xs);
    border-bottom: var(--rhx-border-width) solid var(--rhx-color-border);
    overflow-x: auto;
    scrollbar-width: thin;
}

/* Vertical nav for start/end */
.rhx-tab-group--start > .rhx-tab-group__nav,
.rhx-tab-group--end > .rhx-tab-group__nav {
    flex-direction: column;
    border-bottom: none;
    overflow-x: visible;
    overflow-y: auto;
}

.rhx-tab-group--start > .rhx-tab-group__nav {
    border-right: var(--rhx-border-width) solid var(--rhx-color-border);
}

.rhx-tab-group--end > .rhx-tab-group__nav {
    border-left: var(--rhx-border-width) solid var(--rhx-color-border);
}

/* Bottom placement nav */
.rhx-tab-group--bottom > .rhx-tab-group__nav {
    border-bottom: none;
    border-top: var(--rhx-border-width) solid var(--rhx-color-border);
}

/* ── Body ── */
.rhx-tab-group__body {
    flex: 1;
    min-width: 0;
}

/* ── Tab button ── */
.rhx-tab {
    display: inline-flex;
    align-items: center;
    gap: var(--rhx-space-xs);
    padding: var(--rhx-space-sm) var(--rhx-space-md);
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
    font-size: var(--rhx-font-size-sm);
    font-weight: var(--rhx-font-weight-medium);
    color: var(--rhx-color-text-muted);
    white-space: nowrap;
    position: relative;
    transition: color 0.15s ease, border-color 0.15s ease;
    border-bottom: 2px solid transparent;
    margin-bottom: calc(-1 * var(--rhx-border-width));
}

/* Active indicator (horizontal — top placement, default) */
.rhx-tab--active {
    color: var(--rhx-color-brand-500);
    border-bottom-color: var(--rhx-color-brand-500);
}

/* Bottom placement: indicator on top */
.rhx-tab-group--bottom .rhx-tab {
    border-bottom: none;
    margin-bottom: 0;
    border-top: 2px solid transparent;
    margin-top: calc(-1 * var(--rhx-border-width));
}

.rhx-tab-group--bottom .rhx-tab--active {
    border-top-color: var(--rhx-color-brand-500);
}

/* Vertical tabs: start placement */
.rhx-tab-group--start .rhx-tab {
    border-bottom: none;
    margin-bottom: 0;
    border-right: 2px solid transparent;
    margin-right: calc(-1 * var(--rhx-border-width));
}

.rhx-tab-group--start .rhx-tab--active {
    border-right-color: var(--rhx-color-brand-500);
}

/* Vertical tabs: end placement */
.rhx-tab-group--end .rhx-tab {
    border-bottom: none;
    margin-bottom: 0;
    border-left: 2px solid transparent;
    margin-left: calc(-1 * var(--rhx-border-width));
}

.rhx-tab-group--end .rhx-tab--active {
    border-left-color: var(--rhx-color-brand-500);
}

/* Hover */
.rhx-tab:hover:not([disabled]) {
    color: var(--rhx-color-text);
}

/* Focus */
.rhx-tab:focus-visible {
    outline: 2px solid var(--rhx-color-brand-500);
    outline-offset: -2px;
    border-radius: var(--rhx-radius-sm);
}

/* Disabled */
.rhx-tab--disabled,
.rhx-tab[disabled] {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ── Tab label ── */
.rhx-tab__label {
    display: inline-flex;
    align-items: center;
}

/* ── Close button ── */
.rhx-tab__close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.25rem;
    height: 1.25rem;
    font-size: var(--rhx-font-size-sm);
    color: var(--rhx-color-text-muted);
    border-radius: var(--rhx-radius-sm);
    line-height: 1;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    position: relative;
    z-index: 1;
}

.rhx-tab__close:hover {
    color: var(--rhx-color-danger-500);
    background: var(--rhx-color-danger-50, rgba(239, 68, 68, 0.1));
}

/* ── Tab panel ── */
.rhx-tab-panel {
    padding: var(--rhx-space-md) 0;
}

.rhx-tab-panel:focus-visible {
    outline: 2px solid var(--rhx-color-brand-500);
    outline-offset: 2px;
    border-radius: var(--rhx-radius-sm);
}

/* Vertical placement panel padding */
.rhx-tab-group--start .rhx-tab-panel,
.rhx-tab-group--end .rhx-tab-panel {
    padding: 0 var(--rhx-space-md);
}

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
    .rhx-tab {
        transition: none;
    }
}