content_style.css

html {
    font-family: sans-serif !important;
    user-select: none;
}

#content-login {
    max-width: 40% !important;
}

@media screen and (max-width: 959px) {

    /* 959px以下に適用されるCSS（タブレット用） */
    #content-login {
        max-width: 80% !important;
    }

    #footer {
        display: none !important;
    }

    #header h1 {
        display: none !important;
    }

    #header {
        background: none !important;
    }

    #content-inner {
        padding: 0px 15px 10px 15px !important;
    }

    #content-study {
        padding-bottom: 0 !important;
    }
}

@media screen and (max-width: 480px) {

    /* 480px以下に適用されるCSS（スマホ用） */
    #content-login {
        max-width: 95% !important;
    }
}

#content-login th,
#content-login td {
    display: table-cell !important;
}

.display-block {
    display: block;
}

.display-none {
    display: none;
}

#content-login th,
#content-login td {
    text-align: center !important;
    padding: 1px !important;
}

#question_area,
#question_td {
    text-align: left !important;
}


/* ボタンに余白をつけて、誤操作を防止する */

#question_td input[type=button],
#question_td input[type=submit] {
    margin: 5px !important;
}

#question_area #drill_form input {
    margin: 12px 0 !important;
}


/* 文字サイズを大きくして視認性を高める */

#qu02,
#question_area #drill_form label {
    font-size: 1.2rem !important;
}


/* labelのあとで強制的に改行 */

label:after {
    content: "\A";
    white-space: pre;
}

button {
    font-size: 1rem;
    font-weight: 700;
    position: relative;
    display: inline-block;
    margin: 1rem 0;
    padding: 0.1rem 4rem;
    cursor: pointer;
    -webkit-transition: all 0.3s;
    transition: all 0.3s;
    text-align: center;
    vertical-align: middle;
    text-decoration: none;
    letter-spacing: 0.1em;
    border: none;
    color: #fff;
    background-color: #3177e0;
}

button:hover {
    background: #2c66be;
}

#github_link_div {
    max-width: 100%;
    box-sizing: border-box;
}

.bookmark {
    margin-top: 1em;
    text-decoration: none;
    max-height: 8em;
    padding: 0;
    display: flex;
    width: 100%;
    align-items: stretch;
    box-shadow: 0px 0px 5px -2px #777777;
}

.bookmark-title {
    font-size: 0.85em;
    overflow: hidden;
    text-overflow: ellipsis;
    height: 1.75em;
    white-space: nowrap;
}

.bookmark-text {
    display: flex;
    flex-direction: column;
}

.bookmark-info {
    flex: 4 1 180px;
    padding: 5px 5px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 100%;
    box-sizing: border-box;
}

.bookmark-href {
    font-size: 0.75em;
    margin-top: 0.25em;
}

.icon {
    display: inline-block;
    max-width: 1.2em;
    max-height: 1.2em;
    text-decoration: none;
    vertical-align: text-bottom;
    margin-right: 0.5em;
}

/* 左右中央揃え */
.center_RL {
    display: flex;
    justify-content: center;
}

/* トグルスイッチ */
.switch_label {
    display: flex;
    align-items: center;
}

.switch_label input[type='checkbox'] {
    position: absolute;
    width: 0;
    height: 0;
}

.base {
    width: 56px;
    border-radius: 15px;
    height: 32px;
    background-color: #ddd;
}

.current-status {
    margin-left: 4px;
}

.circle {
    position: absolute;
    top: 4px;
    left: 4px;
    width: 24px;
    height: 24px;
    border-radius: 12px;
    background-color: white;
    transition: 0.5s;
}

.switch {
    position: relative;
    margin: 0.5rem 0;
}

input:checked~.base {
    background-color: rgb(219, 234, 254);
    transition: 0.5s;
}

input:checked~.circle {
    transform: translateX(100%);
    background-color: blue;
}

/* ログイン画面の設定GUIのテーブル */
.table_original {
    width: 100%;
    border-collapse: collapse;
    text-align: center;
}

#table_setting th {
    color: #0b67d6;
}

.current-value {
    text-align: center;
}

table {
    text-align: center;
}