* {
  padding: 0;
  margin: 0;
  font-family:
    Meiryo, Arial, Verdana, "Hiragino Kaku Gothic Pro", Osaka, "MS PGothic",
    sans-serif;
  font-size: 14px;
}

p,
pre,
table,
ul,
ol,
blockquote,
span,
input {
  margin: 5px 10px;
}

ul,
ol {
  padding-left: 20px;
}

h1,
h2,
h3 {
  padding: 2px 10px;
}

h1 {
  font-weight: bold;
  background-color: #ffddff;
}

h2 {
  background-color: #bbffff;
}

h3 {
  background-color: #ffffbb;
}

th,
td {
  padding: 0 10px;
}

th {
  background: #b0d4e5;
}

pre {
  font-family: "ＭＳ ゴシック", "MS Gothic", "Osaka-等幅", monospace;
}

body {
  width: 400px;
  margin: auto;
  background-color: #b0d4e5;
}

#container {
  padding: 0;
  margin: 0;
  line-height: 150%;
  background-color: white;
}

input[type="radio"] {
  margin: 0 10px;
}

input[type="button"] {
  padding: 0 5px;
  font-size: 150%;
  font-weight: bold;
  color: deeppink;
  background-color: #ffddff;
  border: 3px solid deeppink;
  border-radius: 0.5em;
}

input,
label {
  cursor: pointer;
}

div.round {
  margin: 3px 5px;
  border-radius: 0.5em;
}

canvas {
  margin: auto;
}

.option {
  padding: 5px;
  margin: 5px;
  background-color: #ddddff;
}

.option-polygon {
  border: 3px solid;
  border-color: #bbbbff;
}

.option-polygon-num {
  font-size: 1.3rem;
  font-weight: bold;
}