body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

nav {
    display: flex;
    justify-content: center;
    padding: 20px;
    background: url('nav_bild.png') no-repeat center center;
    background-size: cover;
    border: none;
    position: relative;
}

nav::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.697); 
    z-index: 1;
}

.nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 20px; 
    position: relative;
    z-index: 2;
}

.nav-item {
    background-color: rgba(0, 94, 255, 0.377); 
    border-radius: 10px;
    width: 150px; 
    height: 100px; 
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    transition: background-color 0.3s;
}

.nav-item a {
    color: black;
    text-decoration: none;
    display: block;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.nav-item:hover {
    background-color: green;
}