.kanji-canvas-container {
    position: relative;
}
.kanji-canvas {
    /* sử dụng w3-card */
    /* border: burlywood;
    border-style: double; */
    width: 100%;
    cursor: pointer;
}
.kanji-canvas-controls {
    position: absolute;
    top: 0;
    right: 0px;
}
.kanji-canvas-candidates {
    font-size: 32px;
    background-color: #fff;
    border: 1px solid #ccc;
    box-sizing: border-box;
    display: inline-block;
    padding: 5px 10px;
    min-height: 60px;
    cursor: pointer;
}
.tooltip .tooltiptext {
    font-size: small; /* giảm size mặc định */
}
@media screen and (max-width: 600px) { /* mobile friendly */
    .mobi-hide {
      display: none;
    }
    .kanji-canvas {
        height: 400px;
    }
}