.menu {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    transition: .35s ease-in-out;
    z-index: 100;
}
.menu__btn {
    position: fixed;
    top: 2.5%;
    right: 5%;
    transition: .35s ease-in-out;
    border-radius: 50%;
    cursor: pointer;
}
[class^="menu__btn--el"] {
    position: relative;
    margin: 0;
    width: 3rem;
    height: 1rem;
    background-color: var(--main-50);
    margin-bottom: .5rem;
    border-radius: .45rem;
    transition: .35s ease-in-out;
    box-shadow: 12px 10px 13px -12px rgba(0,0,0,0.75);
}
.menu__btn--el2 {
    margin-bottom: 0;
}
.ref-list {
    list-style: none;
    width: 75vw;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    align-content: center;
    height: 100vh;
    position: fixed;
    top: 0;
    justify-content: center;
    background-color: rgba(22, 50, 79, .95);
    transform: translateX(-75vw);
    transition: transform .35s ease-in-out;
}
.ref-list--el {
    text-transform: uppercase;
    padding: 1rem;
    margin-left: 2rem;
    margin-bottom: 4rem;
    text-align: left;
    font-size: 2.5rem;
    color: var(--main-50);
    font-weight: 600;
    border-left: .7rem solid var(--turquoise);
}

.ref-list--el:last-of-type {
    margin-bottom: 0;
}
@media (min-width: 768px) {
    .menu {
        display: none;
    }
}