body {
  margin: 0;
  padding: 0;
  font: 400 16px / 1.75 "游ゴシック体", YuGothic, "游ゴシック", "Yu Gothic", sans-serif;
  color: #444;
}
.container {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
}
header {
  box-sizing: border-box;
  text-align: center;
}
h1 {
  margin: .5em 0 0;
  text-align: center;
}
ul {
  margin: 1em 0;
  padding: 0 0 0 1em;
}
.title {
  display: flex;
  align-items: center;
  gap: .5rem;
}
.mark {
  padding: .25rem;
  border-radius: 3px;
  font-size: .875rem;
  font-weight: normal;
  line-height: 1;
  color: #fff;
}
.mark.-required {
  background: #c86f6f;
}
.mark.-any {
  background: #4795bc;
}
label {
  font-weight: bold;
}
.field {
  font-size: 1rem;
}
input,
textarea,
select {
  width: 100%;
  padding: .75rem;
  border: 2px solid #ddd;
  border-radius: 5px;
  box-sizing: border-box;
  font-size: inherit;
}
.submit .submit__privacy {
  font-size: .875rem;
  text-align: center;
}
.submit .submit__btn {
  display: block;
  width: 240px;
  margin: 2rem auto 0;
  background: green;
  border: none;
  color: #fff;
  cursor: pointer;
  transition: all .3s;
}
.submit .submit__btn:disabled {
  background: #ddd;
  cursor: no-drop;
}
.error input,
.error select {
  border-color: #c86f6f;
}
.note {
  padding: .5rem 0;
  font-size: .875rem;
}
.caution {
  margin: 1rem 0 0;
  padding: 1rem;
  border: 3px solid #c86f6f;
  font-size: .875rem;
}
.caution__title {
  padding: 1rem 0 0;
  font-size: 1.25rem;
  text-align: center;
}
.caution__item {
  list-style-type: '※';
  text-align: left;
}
.caution__item:nth-child(n+2) {
  margin-top: .75rem;
}
.code {
  padding: .25rem;
  border-radius: 3px;
  background: #eee;
  line-height: 1;
}
.errorMessage {
  margin: .5rem 0 0;
  padding: 0 .25rem;
  font-size: .875rem;
  font-weight: bold;
  color: #c86f6f;
}

@media (max-width: 599px) {
  header {
    padding: 2rem 1.5rem;
  }
  .logo img {
    width: 120px;
  }
  h1 {
    font-size: 1.5rem;
  }
  .form {
    padding: 1.5rem 1.5rem 3rem;
    background: #f4f3ee;
  }
  .form__group {
    margin-top: 2rem;
  }
  .field {
    margin-top: .5rem;
  }
}

@media (min-width: 600px) {
  .container {
    width: 640px;
    margin: 0 auto;
  }
  header {
    padding: 3rem 0 1rem;
  }
  .logo img {
    width: 160px;
  }
  h1 {
    font-size: 2rem;
  }
  .form {
    padding: 0 0 3rem;
  }
  .form__group {
    display: flex;
    align-items: center;
    margin-top: .25rem;
    padding: 2rem;
    background: #f4f3ee;
    border-radius: 5px;
  }
  .title {
    width: 16rem;
  }
  .field {
    width: 80%;
  }
}