*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: sans-serif;
}
.header{
    width: 100%;
    height: 100%;
    position: relative;
    top: 0;
    left: 0;
}
.background{
    width: 100%;
    height: 100%;
    position: fixed;
    z-index:-1;
    top: 0;
    left: 0;
}
.ROV-vid{
    width: 60%;
    height: 60%;
    position: fixed;
    z-index:-2;
    top: 17%;
    left: 10%;
    object-fit: cover;
}
.nav {
    width: 100%;
    background-color: rgba(255, 255, 255, 0.8); /* Make it visible */
    display: flex;
    justify-content: space-between;
    padding: 15px 10%;
    align-items: center;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000; /* Ensure it's above everything */
}

.nav .logo{
    font-size: 25px;
    color: black;
    text-shadow: 5px 5px 5px rgba(0,0,0,.3);
}
.nav-menu ul{
    display: flex;
    list-style: none;
}
.nav-menu ul a{
    text-decoration: none;
    color: black;
    text-shadow: 5px 5px 5px rgba(0,0,0,.3);
    font-size: 18px;
    margin: 0 15px;
    transition: color .4s;
}
.nav-menu ul a:hover{
    color: crimson;
}
.header-content{
    width: 100%;
    display: grid;
    place-items: center;
    height: calc(100% - 80px);
    text-align: center;
}
.header-content h1{
    color: white;
    text-shadow: 5px 5px 5px rgba(0,0,0,.5);
    text-transform: uppercase;
    font-size: 40px;
}
.header-content p{
    color: white;
    text-shadow: 5px 5px 5px rgba(0,0,0,.5);
    margin: 0 10px;
}
.header-content input[type=button]{
    padding: 10px 30px;
    margin: 0 10px;
    font-size: 18px;
    color: white;
    border: 2px solid white;
    background-color: rgba(0,0,0,.3);
    cursor: pointer;
    transition: background 4s;
}
.header-content input[type=button]:hover{
    background-color: rgba(0,0,0,.5);
}