_style.css

.card {
    font-family: Arial;
    font-size: 20px;
    text-align: center;
    color: black;
    background-color: #f0f1eb;
    background-repeat:no-repeat;
    background-attachment:fixed;
    background-position:center;
    margin: 0;
}

.question {
    margin: 0;
    height: 100px;
    position:relative;
}

.question span {
    bottom: 15px;
    width: 100%;
    position:absolute;
}

.answer {
    font-size: 23px;
    font-family: 'Helvetica';
    padding: 0.6em;
    border-bottom: 1px solid #c8c8c6;
    border-top: 1px solid #c8c8c6;
    background-color: #e7e8e3;
}

.box {
    background-color: white;
    opacity: 0.98;
    color: #191919;
    border-radius: 6px;
    padding: 10px;
    padding-top: 15px;
}

.japanese {
    font-family: IPAMincho;
    font-size: 33px;
}

ruby rt {
    font-size: 0.4em;
    font-family: Arial;
    opacity: 0.6;
}

.question:hover ruby rt {
    opacity: 1;
}

.hidden {
    display: none;
}

Back Template.html

<div class="question japanese">
    <span>{{furigana:日本語}}</span>
</div>

<div class="answer">{{Meaning}}</div>

<div class="hidden">{{Audio}}</div>

Card CSS Style.css

@import url("_cards.css");

Front Template.html

<div class="question japanese">
    <span>{{kanji:日本語}}</span>
</div>

<div class="answer">…</div>