.box {
    text-align: center;
    margin-top: 20%;
    position: relative;
}

.box button {
    color: rgb(255, 255, 255);
    border: 3px solid rgb(0, 195, 255);
    border-radius: 7px;
    padding: 10px 20px;
    font-family: 'Oswald', sans-serif;
    font-size: 2em;
    background: rgb(23, 76, 221);
    position: relative;
    overflow: hidden;
    transition: background 0.7s ease-in-out, color 0.7s ease-in-out, border-color 0.7s ease-in-out;
}

.box button:hover {
    color: rgba(255, 255, 255);
    background: #4363d8;
    border-color: white;
    box-shadow: 0 0 15px rgb(0, 194, 253);
}

.box button::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        120deg,
        transparent,
        rgba(0, 217, 255, 0.555),
        transparent
    );
    transition: all 1200ms;
}

.box button:hover::before{
    left: 100%;
}