.change-color {
    position: fixed;
    top: 300px;
    left: -132px;
    z-index: 999;
    display: flex;
    cursor: pointer;
    background: linear-gradient(45deg, var(--secondary-color), var(--main-color));
    border-radius: 0 10px 10px 0;
    transition: .3s;
}
.change-color:hover {
    left: 0;
}
.change-color__icon {
    padding: 15px;
    color: #fff;
}

.change-color__title {
    padding: 15px;
    color: #fff;
}