/* ============================================================
   STACK.CSS — Carrusel infinito de tecnologias (elemento firma)
   Scroll horizontal automatico + tarjeta de detalle en hover
   ============================================================ */

.stack-section {
    padding-left: 0;
    padding-right: 0;
    max-width: none;
}

.stack-section .section-header {
    max-width: 1160px;
    margin: 0 auto 48px;
    padding: 0 24px;
}

/* Contenedor con mascara de desvanecido en los bordes */
.stack-track-wrap {
    position: relative;
    width: 100%;
    overflow: hidden;
    mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
    padding: 220px 0 12px;
}

.stack-track {
    display: flex;
    width: max-content;
    gap: 16px;
    animation: stack-scroll 38s linear infinite;
}

.stack-track.paused {
    animation-play-state: paused;
}

@keyframes stack-scroll {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

.stack-item {
    position: relative;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 24px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: default;
    transition: border-color 0.3s ease, transform 0.3s ease, filter 0.3s ease, opacity 0.3s ease;
    white-space: nowrap;
}

.stack-item:hover,
.stack-item.active {
    border-color: var(--border-hover);
    transform: translateY(-3px);
}

/* Cuando un item esta activo, el resto se desenfoca y atenua */
.stack-item.blurred {
    filter: blur(3px);
    opacity: 0.35;
    transform: scale(0.98);
}

.stack-item-icon {
    color: var(--primary-light);
    font-size: 1.2rem;
}

/* Tarjeta flotante de detalle mostrada al hacer hover, siempre arriba del carrusel */
.stack-detail-card {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    width: min(360px, 86vw);
    padding: 22px 24px;
    background: var(--card-bg);
    border: 1px solid var(--border-hover);
    border-radius: var(--radius-md);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
    z-index: 5;
}

.stack-detail-card.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.stack-detail-title {
    font-size: 1.05rem;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.stack-detail-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.stack-detail-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.stack-detail-list li {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.stack-detail-list li::before {
    content: "";
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--primary-light);
    flex-shrink: 0;
}