/* ═══════════════════════════════════════════════════════════════════════════
   VPP TABS — Phase 3
   Modern horizontal scroll tabs, hover/active states, clean underline
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── Tab List — Horizontal Scroll (no wrap) ──────────────────── */
.rz-tabview-nav,
ul[role="tablist"] {
    flex-wrap: nowrap !important;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;          /* Firefox */
    gap: var(--vpp-space-1);
    padding-bottom: 2px;
}

/* Hide scrollbar (Webkit) */
.rz-tabview-nav::-webkit-scrollbar,
ul[role="tablist"]::-webkit-scrollbar {
    display: none;
}

/* ── Tab Item — Base ─────────────────────────────────────────── */
.rz-tabview-nav .rz-tabview-nav-link,
.rz-tabs-item {
    white-space: nowrap;
    flex-shrink: 0;
    padding: var(--vpp-space-2) var(--vpp-space-4);
    font-size: var(--vpp-text-sm);
    font-weight: var(--vpp-font-weight-medium);
    color: var(--vpp-text-secondary);
    border: none !important;
    background: transparent !important;
    border-radius: var(--vpp-radius-md);
    position: relative;
    transition: color var(--vpp-transition-fast),
                background-color var(--vpp-transition-fast);
    cursor: pointer;
}

/* ── Tab Item — Hover ────────────────────────────────────────── */
.rz-tabview-nav .rz-tabview-nav-link:hover,
.rz-tabs-item:hover {
    color: var(--vpp-text-primary);
    background: rgba(14, 165, 233, 0.04) !important;
}

:root:not(.rz-theme-dark) .rz-tabview-nav .rz-tabview-nav-link:hover,
:root:not(.rz-theme-dark) .rz-tabs-item:hover {
    background: rgba(14, 165, 233, 0.06) !important;
}

/* ── Tab Item — Active ───────────────────────────────────────── */
.rz-tabview-nav .rz-tabview-selected .rz-tabview-nav-link,
.rz-tabs-item.rz-state-active,
.rz-tabview-nav .rz-tabview-nav-link.rz-state-active {
    background: rgba(14, 165, 233, 0.08) !important;
    color: var(--vpp-primary-400) !important;
    font-weight: var(--vpp-font-weight-semibold);
}

:root:not(.rz-theme-dark) .rz-tabview-nav .rz-tabview-selected .rz-tabview-nav-link,
:root:not(.rz-theme-dark) .rz-tabs-item.rz-state-active,
:root:not(.rz-theme-dark) .rz-tabview-nav .rz-tabview-nav-link.rz-state-active {
    color: var(--vpp-primary-700) !important;
}

/* Active underline — smooth animated bar */
.rz-tabview-nav .rz-tabview-selected .rz-tabview-nav-link::after,
.rz-tabs-item.rz-state-active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: var(--vpp-space-2);
    right: var(--vpp-space-2);
    height: 2px;
    background: var(--vpp-primary-400);
    border-radius: var(--vpp-radius-full) var(--vpp-radius-full) 0 0;
    animation: vpp-tab-underline-in var(--vpp-transition-fast) forwards;
}

@keyframes vpp-tab-underline-in {
    from { transform: scaleX(0); }
    to   { transform: scaleX(1); }
}

/* ── Tab Content Divider — subtle bottom border ──────────────── */
.rz-tabview > .rz-tabview-nav {
    padding: 0 var(--vpp-space-1);
    border-bottom: 1px solid var(--vpp-border-default);
    background: var(--vpp-bg-elevated);
    border-radius: var(--vpp-radius-md);
}

/* ── Tab Panel — clean spacing ───────────────────────────────── */
.rz-tabview-panel {
    padding-top: var(--vpp-space-4);
}

.librariestab .rz-tabview-panel {
    padding-bottom: 0;
}

/* ── librariestab (shared class) — ensure full width ─────────── */
.librariestab {
    --vpp-library-primary-tabs-height: 48px;
    --vpp-library-secondary-tabs-height: 44px;
    --vpp-tabs-sticky-top: 0px;
    width: 100%;
    min-width: 0;
}

.librariestab > .rz-tabview-nav-container > .rz-tabview-nav {
    width: 100%;
}

.vpp-admin-tabs > .rz-tabview-panels,
.vpp-secondary-tabs > .rz-tabview-panels {
    overflow: visible;
}

.vpp-admin-tabs > .rz-tabview-nav-container {
    position: sticky !important;
    top: var(--vpp-tabs-sticky-top);
    z-index: var(--vpp-z-sticky);
    height: var(--vpp-library-primary-tabs-height);
    min-height: var(--vpp-library-primary-tabs-height);
    background: var(--vpp-bg-elevated);
    border-radius: 0;
    box-shadow: 0 1px 0 var(--vpp-border-default);
    isolation: isolate;
    transform: translateZ(0);
    backface-visibility: hidden;
}

.vpp-admin-tabs > .rz-tabview-nav-container > .rz-tabview-nav {
    position: static !important;
    align-items: stretch;
    height: 100%;
    min-height: 100%;
    border-radius: 0;
}

.vpp-secondary-tabs {
    width: 100%;
}

/* A nested tab bar is navigation, not regular panel content. */
.vpp-admin-tabs .rz-tabview-panel:has(.vpp-secondary-tabs) {
    padding-top: 0;
}

.vpp-secondary-tabs > .rz-tabview-nav-container {
    position: sticky !important;
    top: calc(var(--vpp-tabs-sticky-top) + var(--vpp-library-primary-tabs-height));
    z-index: calc(var(--vpp-z-sticky) - 1);
    height: var(--vpp-library-secondary-tabs-height);
    min-height: var(--vpp-library-secondary-tabs-height);
    border-bottom: 1px solid var(--vpp-border-default);
    background: var(--vpp-bg-elevated);
    border-radius: 0;
    box-shadow: 0 1px 0 var(--vpp-border-default);
    isolation: isolate;
    transform: translateZ(0);
    backface-visibility: hidden;
}

.vpp-secondary-tabs > .rz-tabview-nav-container > .rz-tabview-nav {
    position: static !important;
    width: 100%;
    height: 100%;
    min-height: 100%;
    align-items: stretch;
    gap: var(--vpp-space-1);
    padding: 0 var(--vpp-space-1) 2px;
    background: transparent;
    border: 0;
    border-radius: 0;
}

.vpp-secondary-tabs .rz-tabview-nav .rz-tabview-nav-link,
.vpp-secondary-tabs .rz-tabs-item {
    padding: var(--vpp-space-2) var(--vpp-space-4);
    font-size: var(--vpp-text-sm);
    border-radius: 0 !important;
    transition: none !important;
}

.vpp-secondary-tabs .rz-tabview-nav .rz-tabview-nav-link:hover,
.vpp-secondary-tabs .rz-tabs-item:hover {
    background: transparent !important;
}

.vpp-secondary-tabs .rz-tabview-nav .rz-tabview-selected .rz-tabview-nav-link,
.vpp-secondary-tabs .rz-tabs-item.rz-state-active,
.vpp-secondary-tabs .rz-tabview-nav .rz-tabview-nav-link.rz-state-active {
    background: transparent !important;
    border-radius: 0 !important;
    box-shadow: none;
}

.vpp-secondary-tabs .rz-tabview-nav .rz-tabview-selected .rz-tabview-nav-link::after,
.vpp-secondary-tabs .rz-tabs-item.rz-state-active::after {
    border-radius: 0;
    animation: none;
}

.vpp-secondary-tabs .rz-tabview-panel {
    padding-top: var(--vpp-space-3);
}

/* ── Scroll Fade Indicators (optional visual cue) ────────────── */
.rz-tabview-nav-container {
    position: relative;
}

.rz-tabview-nav-container::after {
    content: '';
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 32px;
    background: linear-gradient(to right, transparent, var(--vpp-bg-elevated));
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--vpp-transition-fast);
}

/* Show fade only when scrollable (controlled via JS if needed, or always subtle) */
.rz-tabview-nav-container:has(.rz-tabview-nav:hover)::after {
    opacity: 0.6;
}