/* ─── nav_scroll: tabs scrollables horizontalmente con indicadores visuales ───
 *
 * Componente reutilizable global. Se aplica AUTOMÁTICAMENTE a:
 *   - .nav-lb-tab (tabs del tema Geeks)
 *   - .nav-tabs-primary (variante custom del proyecto)
 *
 * El JS (static/pages/core/nav_scroll.js) envuelve cada .nav-* en un wrapper
 * .nav-scroll-wrap y agrega clases .can-scroll-left / .can-scroll-right según
 * la posición del scroll.
 *
 * Override de fondo:
 *   Por default las sombras laterales usan blanco (#fff). Si el contenedor
 *   tiene otro fondo, podés override con la CSS var `--nav-scroll-bg`:
 *     <div class="card-header" style="--nav-scroll-bg: #f5f7fa;">
 */

.nav-scroll-wrap {
    position: relative;
    overflow: hidden;
    --nav-scroll-bg: #fff;
}

.nav-scroll-wrap > .nav {
    flex-wrap: nowrap;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scrollbar-width: none;          /* Firefox */
    -ms-overflow-style: none;       /* IE/Edge legacy */
    scroll-behavior: smooth;
}

.nav-scroll-wrap > .nav::-webkit-scrollbar {
    display: none;                  /* Chrome/Safari/Webkit */
}

.nav-scroll-wrap > .nav .nav-item {
    flex-shrink: 0;                 /* evita que las tabs se compriman */
}

/* ── Sombras gradient laterales (aparecen cuando hay scroll posible) ── */
.nav-scroll-wrap::before,
.nav-scroll-wrap::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 40px;
    pointer-events: none;
    z-index: 2;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.nav-scroll-wrap::before {
    left: 0;
    background: linear-gradient(to right, var(--nav-scroll-bg), rgba(255,255,255,0));
}

.nav-scroll-wrap::after {
    right: 0;
    background: linear-gradient(to left, var(--nav-scroll-bg), rgba(255,255,255,0));
}

.nav-scroll-wrap.can-scroll-left::before { opacity: 1; }
.nav-scroll-wrap.can-scroll-right::after { opacity: 1; }

/* ── Chevrons indicadores clickables — circular blanco con sombra ──
 * Botón circular pequeño (28px), centrado verticalmente, pegado al borde.
 * Fondo blanco + ícono primary + sombra sutil para destacar sobre cualquier card.
 * Hover invierte: fondo primary + ícono blanco. Active: scale-down breve. */
.nav-scroll-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 3;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #fff;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 50%;
    padding: 0;
    cursor: pointer;
    color: var(--bs-primary);
    line-height: 1;
    opacity: 0;
    pointer-events: none;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
    transition: opacity 0.2s ease,
                background-color 0.15s ease,
                border-color 0.15s ease,
                color 0.15s ease,
                box-shadow 0.15s ease,
                transform 0.1s ease;
}

.nav-scroll-arrow.is-left  { left: 4px; }
.nav-scroll-arrow.is-right { right: 4px; }

.nav-scroll-arrow i {
    font-size: 0.85rem;
    -webkit-text-stroke: 0.4px currentColor;
}

.nav-scroll-wrap.can-scroll-left  .nav-scroll-arrow.is-left,
.nav-scroll-wrap.can-scroll-right .nav-scroll-arrow.is-right {
    opacity: 1;
    pointer-events: auto;
}

.nav-scroll-arrow:hover {
    background-color: var(--bs-primary);
    border-color: var(--bs-primary);
    color: #fff;
    box-shadow: 0 4px 10px rgba(var(--bs-primary-rgb), 0.3);
}

.nav-scroll-arrow:focus-visible {
    outline: 2px solid var(--bs-primary);
    outline-offset: 2px;
}

.nav-scroll-arrow:active {
    transform: translateY(-50%) scale(0.92);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}