#main {
    text-align: center;
}

#main h1#title {
    font-size: 50px;
    height: 160px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0;
}

#main #start {
    height: 120px;
    display: flex;
    justify-content: center;
    align-items: top;
}

#main #start div.button {
    width: 150px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    color: white;
    border-radius: 10px;
}

#main #start div.button a {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    text-decoration: none;
    color: inherit;

    background-image: url("./image/btn_login_base.png");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}
#main #start div.button a:hover {
    background-image: url("./image/btn_login_hover.png");
}
#main #start div.button a:active {
    background-image: url("./image/btn_login_press.png");
}