.main-btn{
    width:46%;
    margin:10px;
}

.nav-item .nav-link{
    text-align:center;
    font-size:1.3rem;
}

.center{
    text-align:center;
}


    /** スピン全体 */
    .spin {
        display: inline-flex;
        margin-left:5px;
        margin-right:5px;
    }
    /** スピン入力項目 */
    .spin .spin-input {
        -webkit-appearance: none;
        appearance: none;
        border-radius: 0;
        text-align: right;
    }
    /** スピンボタン */
    .spin .spin-minus,
    .spin .spin-plus {
        margin: 0;
        width: 40px;
        height:40px;
        border: 1px solid #bbb;
        background: #f9f9f9;
        cursor: pointer;
        transition: 0.5s background-color;
        user-select: none;
    }
    .spin .spin-minus:hover,
    .spin .spin-plus:hover {
        background: #f0f0f0;
    }
    .spin .spin-minus { border-right: none }
    .spin .spin-plus { border-left: none }

    .spin .spin-input{
        -webkit-appearance: none;
        background-color: #FFF;
        background-image: none;
        border-radius: 4px;
        border: 1px solid #DCDFE6;
        box-sizing: border-box;
        color: #606266;
        display: inline-block;
        font-size: inherit;
        height: 40px;
        line-height: 40px;
        outline: 0;
        padding: 0 15px;
        -webkit-transition: border-color .2s cubic-bezier(.645,.045,.355,1);
        transition: border-color .2s cubic-bezier(.645,.045,.355,1);
        width: 100px;
        text-align:center;
    }

    .default_hide{
        display:none;
    }