#header{
    background-color: black;
}

.nav-menu a{
    color:white;
}
#header .logo img {
    padding: 0;
    margin: 0;
    max-height: 58px;
}
#footer{
    background-color: black;
}
#about{
    background-color: black;
}

#portfolio{
    background-color: black;
}
#contact{
    background-color: black;
}
.back-to-top:hover {
    color: #fff;
    background: #5f656a;
    transition: background 0.2s ease-in-out;
}

.contact .php-email-form button[type="submit"] {
    background: #5f656a;
    border: 0;
    padding: 10px 24px;
    color: #fff;
    transition: 0.4s;
}
.back-to-top{
    background: #5f656a;
}