#main {
  width: 900px;
  margin: 0 auto;
  text-align: left;
//  outline: solid 1px red;
}

form > section {
  margin-top: 30px;
  line-height: 1.4em;
  text-align: left;
}

form > section > h1 {
  font-size: 24px;
  margin-bottom: 0.5em;
  text-align: center;
  line-height: 1.4em;
  color: #3572bd;
}

form > section strong {
  color: #a40000;
}

form > section ul {
  margin-left: 1em;
}

#kankyo {
  margin: 30px auto;
  width: calc(100% - 4em);
  padding: 1em 2em;
  outline: solid 1px #dddddd;
  text-align: left;
  border-radius: 0.5em;
  font-size: 18px;
}

#kankyo h1 {
  margin-bottom: 0.5em;
  text-align: center;
  font-size: 18px;
}

#contact {
  margin: 30px auto;
  width: calc(100% - 4em);
  padding: 1em 2em;
  outline: solid 1px #dddddd;
  text-align: center;
  border-radius: 0.5em;
  font-size: 21px;
  line-height: 1.4em;
}

#contact h1 {
  margin-bottom: 0.2em;
  text-align: center;
}

#contact p {
  display: inline-block;
}

#form-button {
  margin: 30px 0 0 0;
  width: 100%;
  text-align: center;
}

#form-kakunin {
  width: calc(100% - 2em);
  margin: 0 auto 1em auto;
  text-align: center;
  
}

input#kakunin-checkbox {
  display: none;
}

#kakunin-label {
  box-sizing: border-box;
  cursor: pointer;
  display: inline-block;
  padding: 0;
  left: 0.5em;
  position: relative;
  width: auto;
  line-height: 1.4em;
}

.material-symbols-outlined {
  font-size: 1.4em !important;
  vertical-align: -0.2em;
  font-variation-settings:
  'FILL' 1,
  'wght' 400,
  'GRAD' 0,
  'opsz' 48
}

input[type=submit]:disabled {
  background-color: #aaaaaa;
  opacity: 0.6;
  cursor: default;
}