html {
    background: papayawhip;
    /*background-image: linear-gradient(270deg, rgb(230, 233, 233) 0%, rgb(216, 221, 221) 100%);
    -webkit-font-smoothing: antialiased;*/
}

body {
    /*padding: 10px;*/
    background-color: papayawhip;
    /*box-shadow: 0 0 2px rgba(0, 0, 0, 0.06);*/
    color: #545454;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.5;
	text-align: center;
	margin: 0 auto;
	/*padding: 1em;*/
    /*max-width: 1600px;*/
    /*padding: 2em 2em 4em;*/
}


h1, h2, h3, h4, h5, h6 {
    color: #222;
    font-weight: 600;
    line-height: 1.3;
}

h2 {
    margin-top: 1.3em;
}

a {
    color: #0083e8;
}

b, strong {
    font-weight: 600;
}

samp {
    display: none;
}
table {
	table-layout: auto;
    background-color: white;
	border-collapse: collapse; /* 隣接する枠線を重ねる */
    border: 1.5px solid gray;
}

table td{
    border: 1px solid gray;
}
table td.k{
    background-color: indianred;
    color: white;
}
table td.c{
    background-color: cornsilk;
}
table td.o{
    background-color: rosybrown;
    color: white;
}
table td.correct{
    width: 120px;
    height: 100px;
}
table td.correct_k{
    width: 120px;
    background-color: indianred;
    color: white;
}
table td.correct_c{
    width: 120px;
    background-color: cornsilk;
}
table td.correct_o{
    width: 120px;
    background-color: rosybrown;
    color: white;
}
img {
}
p.red{
    color: red;
}

@keyframes colorize {
    0% {
        -webkit-filter: grayscale(100%);
        filter: grayscale(100%);
    }
    100% {
        -webkit-filter: grayscale(0%);
        filter: grayscale(0%);
    }
}
div {
	text-align: center;
}