.hero {
    position: relative;
    height: 100vh; /* výška celé obrazovky */
    overflow: hidden;
}

.background-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    object-fit: cover;
    z-index: -1;
}

.overlay {
    position: relative;
    z-index: 1;
    color: white;
    text-align: center;
    top: 40%;
}