body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen",
  "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue",
  sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 20px;
}

ol,
ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

code {
  font-family: source-code-pro, Menlo, Monaco, Consolas, "Courier New",
  monospace;
}

a {
  text-decoration: none;
  color: #333;
}

.App {
  width: 800px;
  margin: 0 auto;
}

.header {
  position: relative;
}

.header .menu {
  position: absolute;
  top: 10px;
  right: 0;
}


.header .link {
  padding: 20px;
  margin-left: 5px;
  border-radius: 4px;
}

table {
  border-collapse: collapse;
  width: 100%;
}
table td {
  width: 25%;
  height: 70px;
  border: 1px solid #ccc;
  text-align: center;
  font-size: 21px;
}

table td:first-child {
  width: 10%;
}

.off td {
  background: #eee;
  color: #ccc;
}

.btn_del {
  margin-left: 10px;
  color: #fff;
  background-color: firebrick;
}

button {
  padding: 10px;
  font-weight: bold;
  font-size: 18px;
  cursor: pointer;
  border: 0 none;
  border-radius: 6px;
  padding: 10px 20px;
  color: #fff;
  background-color: dodgerblue;
}

.input_area {
  margin-bottom: 10px;
}

.input_area label {
  display: block;
  margin-bottom: 10px;
}

.input_area input {
  width: 400px;
  height: 40px;
  font-size: 20px;
  padding: 0 10px;
}

.input_area select {
  width: 400px;
  height: 40px;
  font-size: 20px;
}
