.promoButton {
    padding: 25px 30px;
    background-color: #050801;
    color: #03e9f4;
    font-weight: bold;
    border: none;
    border-radius: 5px;
    letter-spacing: 4px;
    overflow: hidden;
    transition: 0.5s;
    cursor: pointer;
}

.promoButton:hover {
        background: #03e9f4;
        color: #050801;
        box-shadow: 0 0 5px #03e9f4, 0 0 25px #03e9f4, 0 0 50px #03e9f4, 0 0 200px #03e9f4;
        -webkit-box-reflect: below 1px linear-gradient(transparent, #0005);
    }
#list {
    display:inline;
}