/* スクロール禁止 */
html, body {
    overflow: hidden;
}

#word_area {
    height: 20vh;
    width: 100%;
    text-align: center;
    display: table;
}
#word_e_text{
    display: table-cell;
    vertical-align: bottom;
}
.large_text {
    font-size: 8vh;
}
#word_ans_area{
    height: calc(80vh - 350px);
    width: 100%;
    text-align: center;
    display: table;
    position: relative;
}
#word_j_text{
    display: table-cell;
    font-size: 3vh;
}
.model_links {
    position: absolute;
    right: 10pt;
}
.problem {
    bottom: 0;
}
.modal-content {
    max-height: 80vh;
    overflow-y:scroll;
}
#id_level {
    width: 100%;
}

/* 広告 */
.ad_box {
    text-align: center;
    overflow: hidden;
    margin-top: 1px;
    margin-bottom: 1px;
}
iframe.ad_728x90 {
    margin: auto;
    border: none;
    width: 728px;
    height: 90px;
}
iframe.ad_320x100 {
    margin: auto;
    border: none;
    width: 320px;
    height: 100px;
}

/* アイコン */
.flick_icons {
    width: 2em;
}

/* 例文のサンプル */
.example {
    margin-bottom: 8px;
}