#container {
    text-align: center;
}

#container * {
    margin-left: auto;
    margin-right: auto;
}

#lang-list {
    max-width: 640px;
    list-style-position: inside;
}

#lang-list li {
    text-align: left;
}

#about {
    max-width: 640px;
    padding: 0 20px 0 20px;
    text-align: justify;
}

.select-div {
    display: inline-flex;
    gap: 40px;
    margin: 20px;
}

.select-mode {
    margin: 0;
    border: 2px solid lightgray;
    width: 8em;
    color: black;
}

.select-mode:hover {
    border: 2px solid black;
    cursor: pointer;
}

.select-mode-irisu {
    border: 2px solid black;
    background-color: #5c90bb;
    color: white;
}

.select-mode-metsu {
    border: 2px solid black;
    background-color: #a21326;
    color: white;
}

.tbl-score {
    margin: 20px;
}

.tbl-score, .tbl-score th, .tbl-score td {
    border: 1px double black;
}

.tbl-score th, .tbl-score td {
    padding: 4px 8px 4px 8px;
    text-align: center;
}

.tbl-score th {
    height: 2em;
}