.login-logo{
    width:60%;
    height:auto;
    margin:20px auto;
    width:60%;
    height:auto;
}

.error_message {
    color:red;
    font-weight:bold;
    margin-top:5px
}

.operation_message {
    color:red;
    font-weight:bold;
    font-size:18px;
    margin-top:30px
}

.operation_information {
    width: 360px;
    min-width: 280px;
    height: 150px;
    font-size: 16px;
    padding: 10px 10px 10px 10px;
    border-style: solid;
    border-radius: 0px 0px 0px 10px;
    border-width: 3px;
    border-color: #6c757d;
    overflow: auto;
    font-family:Meiryo, "メイリオ", "Hiragino Kaku Gothic Pro", "ヒラギノ角ゴ Pro W3", Osaka, "MS P Gothic", "ＭＳ Ｐゴシック", sans-serif;
}

/* 台形型タブ */
.information_tab {
    margin-top:30px;
    margin-bottom:0px;
    padding:5px 5px 5px 10px;
    font-size:14px;
    color:white;
    display: inline-block;
    position: relative;
    z-index: 1;
}

/* 台形型タブ */
.information_tab::before {
    width: 160px;
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left:0;
    z-index: -1;
    background: #6c757d;
    transform: scaleY(1.3) perspective(.6em) rotateX(5deg);
    transform-origin: bottom left;
    border-radius: 8px 8px 0 0;
}