/* メインセクション背景 */
body {
  background-color: #6fa4c3;
}

.section-heading {
  font-size: 1.25rem; /* 20pt */
  color: #6d6c6c;
  border-bottom: 1px dotted #6d6c6c;
  margin-bottom: 20px;
}

.contact-section {
  width: 700px;
  margin: 0 auto;
}

.contact-title {
  font-size: 1.25rem;
  border-bottom: solid 5px #6fa4c3;
  padding-bottom: 10px;
  color: #6d6c6c;
  width: 300px;
  text-align: center;
  margin: 0 auto;
}

.contact-subtitle {
  font-size: 1.25rem; /* 20pt */
  color: #6d6c6c;
  margin-bottom: 30px;
  text-align: center;
}

.contact-form-table {
  width: 100%;
  font-size: 0.8125rem; /* 13pt */
  border-collapse: collapse;
}

.contact-form-table tr {
  border-bottom: 1px dotted #b5b5b5;
}

.contact-form-table td {
  padding: 10px;
}

.contact-form-table input[type="text"],
.contact-form-table input[type="email"],
.contact-form-table textarea {
  width: 100%;
  padding: 10px;
  box-sizing: border-box;
  background-color: #f5f5f5;
  border: none;
}

.contact-submit {
  text-align: center;
  margin-top: 30px;
}

.contact-submit button {
  background: none;
  border: none;
  cursor: pointer;
}

.contact-submit img {
  width: 120px;
}

.required {
  color: #6d6c6c;
}

@media screen and (max-width: 768px) {
  .contact-title {
    width: 100%;
    font-size: 1.1rem;
  }

  .contact-subtitle {
    font-size: 1.1rem;
  }

  .contact-form-table {
    font-size: 0.75rem; /* 12pt */
  }

  .contact-form-table td {
    display: block;
    width: 100%;
    box-sizing: border-box;
    padding: 8px 0;
  }

  .contact-form-table tr {
    display: block;
    margin-bottom: 10px;
    border-bottom: none;
  }

  .contact-submit img {
    width: 100px;
  }
}

@media screen and (max-width: 480px) {
  .contact-section {
    width: 100%;
    margin: 0 auto;
}
  .contact-title {
    font-size: 1rem;
  }

  .contact-subtitle {
    font-size: 1rem;
  }

  .contact-form-table {
    font-size: 0.6875rem; /* 11pt */
  }

  .contact-submit img {
    width: 80px;
  }
}