.contact-form {
  background: #000;
  padding: 2rem;
  color: #fff;
  font-family: "游ゴシック体", "Yu Gothic", sans-serif;
  border: 2px solid #cc0000;
  border-radius: 10px;
  max-width: 700px;
  margin: 0 auto;
}

.contact-form h3 {
  margin-top: 1.5em;
  font-size: 1.1rem;
  color: #fff;
  background: #333;
  padding: 0.5em;
  border-left: 6px solid #e60033;
  font-weight: bold;
}

.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form input[type="tel"],
.contact-form textarea {
  width: 100%;
  padding: 0.8em;
  margin-top: 0.5em;
  background: #111;
  border: 1px solid #888;
  color: #fff;
  border-radius: 5px;
  font-size: 1rem;
}

.contact-form textarea {
  resize: vertical;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: #aaa;
}

.contact-form input[type="checkbox"] {
  margin-right: 0.5em;
}

.contact-form .submit-button {
  text-align: center;
  margin-top: 2em;
}

.contact-form input[type="submit"],
.contact-form input[type="button"] {
  background: #000;
  color: #fff;
  padding: 0.8em 2em;
  font-size: 1rem;
  border: 2px solid #fff;
  border-radius: 6px;
  transition: 0.3s;
}

.contact-form input[type="submit"]:hover,
.contact-form input[type="button"]:hover {
  background: #e60033;
  color: #fff;
  border-color: #e60033;
}
.kana-input {
  font-family: "メイリオ", "Meiryo", sans-serif;
  letter-spacing: 0.1em;
}
.contact-form .required {
  color: #e60033;
  font-weight: bold;
  font-size: 0.95em;
}