#login_box {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 70%;
    height: 70%;
    background-color: #bfef85;
}

#login_box > h1 {
    font-size: 2.5em;
    font-weight: bold;
    color: #000;
}

#login_box > input {
    width: 100%;
    height: 50px;
    border: none;
    border-bottom: 1px solid black;
    margin-bottom: 10px;
    padding-left: 10px;
}

#login_box > form {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: space-evenly;
}

#login_box > input {
    margin: 2px;
    border-radius: 5px;
}