header {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding: 30px 100px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 15;
  }
header .logo {
    color: #E3E8ED;
    font-weight: 700;
    text-decoration: none;
    font-size: 2em;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-family: 'Century Gothic';
    position: relative;
}
header ul {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    align-items: center;
}
header ul li {
    list-style: none;
    margin-left: 20px;
}
header ul li a {
    text-decoration: none;
    padding: 6px 15px;
    color: #E3E8ED;
    font-family: 'Century Gothic';
    border-radius: 20px;
    transition: 0.5s;
}
header ul li a:hover, header ul li a.active {
    background: #E3E8ED;
    color: #0c1b2f;
}

/* Responsive */
@media (max-width: 1000px) {
    header {
        padding: 30px 40px;
    }
}
@media (max-width: 860px) {
    header {
        flex-direction: column;
        padding: 18px 40px;
    }
    header ul {
        padding-top: 10px;
    }
}
@media (max-width: 650px) {
    header ul {
        display: none;
    }
    header {
        padding: 30px 20px;
    }
}
@media (max-width: 450px) {
    header ul li {
        margin-left: 10px;
    }
}