/* ================================================================
   PROJECT TAB BAR — Phase 1
   Namespace: .project-tab-bar / .ptab-*
   Ownership: project-tab-bar.css owns all .ptab-* selectors
   ================================================================ */

.project-tab-bar {
    display: flex;
    align-items: center;
    height: 32px;
    background: var(--color-surface-1, #1a1a1a);
    border-bottom: 1px solid var(--color-border, #333);
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: thin;
    scrollbar-color: var(--color-border, #444) transparent;
    user-select: none;
    flex-shrink: 0;
    gap: 1px;
    padding: 0 4px;
}

.project-tab-bar::-webkit-scrollbar {
    height: 3px;
}

.project-tab-bar::-webkit-scrollbar-thumb {
    background: var(--color-border, #444);
    border-radius: 2px;
}

/* ── Tab item ─────────────────────────────────────────────────── */

.ptab-item {
    display: flex;
    align-items: center;
    gap: 4px;
    height: 26px;
    padding: 0 6px 0 4px;
    border-radius: 4px 4px 0 0;
    background: transparent;
    color: var(--color-text-secondary, #888);
    font-size: 11px;
    font-family: var(--font-ui, system-ui, sans-serif);
    cursor: pointer;
    white-space: nowrap;
    flex-shrink: 0;
    transition: background 0.1s, color 0.1s;
    max-width: clamp(110px, 40vw, 160px);
    position: relative;
}

.ptab-item:hover {
    background: var(--color-surface-2, #252525);
    color: var(--color-text-primary, #ddd);
}

.ptab-item--active {
    background: var(--color-surface-3, #2d2d2d);
    color: var(--color-text-primary, #eee);
    border-top: 2px solid var(--color-accent, #4a9eff);
    border-left: 1px solid var(--color-border, #444);
    border-right: 1px solid var(--color-border, #444);
}

.ptab-item--pinned .ptab-pin {
    color: var(--color-accent, #4a9eff);
    opacity: 1;
}

.ptab-item--hibernated:not(.ptab-item--active) {
    border-bottom: 1px dotted var(--color-text-muted, #666);
    color: var(--color-text-muted, #777);
}

/* ── Pin icon (shown on hover or when pinned) ─────────────────── */

.ptab-pin {
    flex-shrink: 0;
    font-size: 10px;
    opacity: 0;
    cursor: pointer;
    padding: 2px;
    border-radius: 2px;
    line-height: 1;
    color: var(--color-text-muted, #666);
    transition: opacity 0.1s, color 0.1s;
}

.ptab-item:hover .ptab-pin,
.ptab-item--active .ptab-pin {
    opacity: 0.6;
}

.ptab-item:hover .ptab-pin:hover,
.ptab-item--active .ptab-pin:hover {
    opacity: 1;
    background: var(--color-surface-4, #333);
}

.ptab-item--pinned .ptab-pin {
    opacity: 1 !important;
}

/* ── Title ────────────────────────────────────────────────────── */

.ptab-title {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    min-width: 0;
}

/* ── Close button ─────────────────────────────────────────────── */

.ptab-close {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    border: none;
    background: transparent;
    color: var(--color-text-muted, #666);
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    border-radius: 2px;
    opacity: 0;
    transition: opacity 0.1s, background 0.1s, color 0.1s;
    line-height: 1;
}

.ptab-item:hover .ptab-close,
.ptab-item--active .ptab-close {
    opacity: 0.5;
}

.ptab-close:hover {
    opacity: 1 !important;
    background: var(--color-danger-muted, rgba(220,50,50,0.2));
    color: var(--color-danger, #e05555);
}

/* ── New tab button ───────────────────────────────────────────── */

.ptab-new {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    border: none;
    background: transparent;
    color: var(--color-text-muted, #666);
    cursor: pointer;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    margin-left: 4px;
    transition: background 0.1s, color 0.1s;
    line-height: 1;
}

.ptab-new:hover {
    background: var(--color-surface-2, #252525);
    color: var(--color-text-primary, #ddd);
}