/* ==== Comportamiento estilo "ShieldNet" (clonado): barra de progreso, boton volver arriba, header con sombra al hacer scroll ==== */

.ydm-scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 0%;
    background-color: var(--ydm-color-primary);
    z-index: 1100;
    transition: width .1s ease-out;
}

.ydm-back-to-top {
    position: fixed;
    right: 22px;
    bottom: 22px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: none;
    background-color: var(--ydm-color-primary);
    color: var(--ydm-color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1090;
    box-shadow: 0 4px 12px rgba(0, 0, 0, .25);
    opacity: 0;
    pointer-events: none;
    transform: translateY(16px);
    transition: opacity .2s ease, transform .2s ease, background-color .15s ease;
}

.ydm-back-to-top:hover {
    background-color: var(--ydm-color-primary-hover);
}

.ydm-back-to-top svg {
    width: 20px;
    height: 20px;
}

/* Sombra en el header cuando ya se hizo scroll (ver data-header-shadow en ydm-shieldnet.js) */
.navbar.ydm-header-shadow {
    box-shadow: 0 2px 10px rgba(0, 0, 0, .25);
}

@media (prefers-reduced-motion: reduce) {
    .ydm-scroll-progress,
    .ydm-back-to-top {
        transition: none !important;
    }
}