.ecs-slider {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}

.ecs-slide {
    position: absolute;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.ecs-slide.active { opacity: 1; }

.ecs-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 48px;
    color: white;
    padding: 10px;
    cursor: pointer;
    z-index: 10;
}

.ecs-prev { left: 25px; }
.ecs-next { right: 25px; }