:root {
    --slide-transition: 1.5s ease-in-out;
    --banner-h: clamp(320px, 35vw, 560px);
}

/* Banner wrapper */
.banner {
    width: 100%;
    height: var(--banner-h);
    position: relative;
    overflow: hidden;
}

.slides,
.slide {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

.slide {
    opacity: 0;
    transition: opacity var(--slide-transition);
}

.slide.active {
    opacity: 1;
}

.slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Arrow buttons */
.nav-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.5);
    color: #fff;
    border: none;
    cursor: pointer;
    padding: 10px 15px;
    font-size: 24px;
    border-radius: 4px;
    z-index: 10;
    transition: background .3s;
}

.nav-arrow:hover {
    background: rgba(0, 0, 0, 0.7);
}

.prev {
    left: 10px;
}

.next {
    right: 10px;
}