body {
    height: 100%;
    font-family: Avenir, Helvetica, Arial, Verdana, Roboto, "游ゴシック Medium", "Yu Gothic Medium", "游ゴシック体", YuGothic, 'ヒラギノ角ゴシック Pro', 'Hiragino Kaku Gothic Pro', メイリオ, Meiryo, 'ＭＳ Ｐゴシック', 'MS PGothic', sans-serif;
    color: #333;
    line-height: 160%;
    background-color: #fff;
}


.container {
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.login_area {
    width: 80%;
    max-width: 700px;
    border: 1px solid #000;
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1em;
    padding: 2em 1em;
    width: 700px;
    border: 1px solid #125900;
    border-radius: 10px;
    padding: 50px 20px;
}

h1 {
    font-family: serif;
    font-size: 45px;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 0.25em;
    color: green;
}

h1 .title_option {
    font-size: 25px;
    color: #fff;
    background-color: green;
    height: 25px;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 5px;
}

h2 {
    margin: 0;
    padding: 0;
    margin-bottom: 20px;
}

table {
    margin: 30px auto 30px;
    border-spacing: 0;
    border-collapse: collapse;
    border-top: 1px solid #aaa;
    border-left: 1px solid #aaa;
    background: #fff;
}

table th {
    width: 180px;
    background-color: #f0faff;
    padding: 5px;
    text-align: center;
    font-weight: normal;
    border-bottom: 1px solid #aaa;
    border-right: 1px solid #aaa;
}

table td {
    width: 120px;
    padding: 10px;
    border-bottom: 1px solid #aaa;
    border-right: 1px solid #aaa;
}

#btnInput {
    text-align: center;
}