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

.project-tab-bar {
    /* Posicionada antes de #app no body — wrapper visual como header global
       (ver projectTabBar.ts anchor 2026-05-31). Relative + flow normal
       empurra #app pra baixo (não sobrepõe). */
    position: relative;
    z-index: 100;
    display: flex;
    align-items: flex-end;
    height: 36px;
    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;
    -webkit-user-select: none;
    user-select: none;
    flex-shrink: 0;
    gap: 2px;
    padding: 4px 8px 0;
    width: 100%;
    box-sizing: border-box;
}

.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: 6px;
    height: 30px;
    padding: 0 8px 0 6px;
    border-radius: 6px 6px 0 0;
    background: transparent;
    color: var(--color-text-secondary, #888);
    font-size: 12px;
    font-family: var(--font-ui, system-ui, sans-serif);
    cursor: pointer;
    white-space: nowrap;
    flex-shrink: 0;
    transition: background 0.12s ease, color 0.12s ease, border-color 0.12s ease;
    max-width: clamp(140px, 40vw, 200px);
    min-width: 100px;
    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: 3px solid var(--color-accent, #4a9eff);
    border-left: 1px solid var(--color-border, #444);
    border-right: 1px solid var(--color-border, #444);
    font-weight: 600;
    box-shadow: 0 -1px 4px rgba(74, 158, 255, 0.15);
}

.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;
}

/* ── Archive button — escondido no default UX 2026-05-31
   Calvin diretiva: declutter tab items. Archive disponível via menu
   contextual futuro (não polui visual primário). */
.ptab-archive {
    display: none;
}

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

.ptab-close {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    border: none;
    background: transparent;
    color: var(--color-text-muted, #666);
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    border-radius: 3px;
    opacity: 0;
    transition: opacity 0.12s, background 0.12s, color 0.12s;
    line-height: 1;
}

.ptab-item:hover .ptab-close,
.ptab-item--active .ptab-close {
    opacity: 0.7;
}

.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: 28px;
    height: 28px;
    border: none;
    background: transparent;
    color: var(--color-text-muted, #888);
    cursor: pointer;
    font-size: 18px;
    font-weight: 300;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    margin-left: 6px;
    transition: background 0.12s, color 0.12s, transform 0.12s;
    line-height: 1;
}

.ptab-new:hover {
    background: var(--color-surface-2, #252525);
    color: var(--color-accent, #4a9eff);
    transform: scale(1.08);
}

.ptab-new:active {
    transform: scale(0.96);
}