*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    text-decoration: none;
}

/* nav */

nav {
    position: fixed;
    z-index: 99;
}

.nav-menu{
    width: 100%;
    height: 80px;
    padding: 20px 60px;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    border-radius: 0 0 20px 0;
}

.nav-item{
    margin: 0 15px;
    list-style: none;
}

.nav-item > a{
    color: #fff;
    font-weight: bold;
}

/* header-bg */

header{
    background-image: url("../images/header-bg.jpg");
    background-size: cover;
    background-repeat: no-repeat;
    display: flex;
    align-items: center;
}