.contact-section-container {
  padding: 100px 80px;
  width: 880px;
  max-width: 100%;
  margin: 0 auto;
}
.contact-section-container .contact-title {
  font-size: 20px;
  margin: 0 0 40px;
  letter-spacing: 0.3em;
  line-height: 1.8em;
  text-align: center;
}
.contact-section-container .contact-description {
  letter-spacing: 0.15em;
  line-height: 1.8em;
  padding: 5px;
}
.contact-section-container .phone-box {
  padding: 30px;
  width: 100%;
  background-color: #f7f7f7;
  text-align: center;
  border-radius: 10px;
}

.contact-section-container .phone-box h2 {
  font-size: 24px;
  line-height: 1.8em;
  letter-spacing: 0.1em;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  padding: 5px;
  font-weight: bolder;
}
.contact-section-container .phone-box .icon {
  font-size: 20px;
}
.contact-section-container .phone-box p {
  font-size: 14px;
  line-height: 1.8em;
  letter-spacing: 0.15em;
  padding: 5px;
}
.contact-section-container .form-container {
  margin: 80px auto 0;
}
.contact-section-container form {
  margin-top: 40px;
}
.input-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0 0 30px;
}
input[type="text"],
input[type="password"] {
  border: 1px solid gray;
  border-radius: 4px;
  letter-spacing: 0.15em;
  line-height: 1.4em;
  padding: 10px;
  height: 50px;
}
textarea {
  border: 1px solid gray;
  border-radius: 4px;
  letter-spacing: 0.15em;
  line-height: 1.4em;
  padding: 10px;
}
label {
  letter-spacing: 0.3em;
  line-height: 1.4em;
}
label.required::after {
  content: "必須";
  background-color: black;
  color: white;
  padding: 2px 5px;
  border-radius: 4px;
  font-size: 12px;
  margin: 0 0 0 10px;
  font-weight: bold;
  text-align: center;
}
.contact-section-container .agree-checkbox-wrapper {
  margin-top: 20px;
  font-size: 14px;
}
.contact-section-container .agree-checkbox-wrapper label {
  line-height: 1.4em;
  letter-spacing: 0.15em;
}
.contact-section-container .submit {
  padding: 25px 40px;
  margin: 40px 0;
  border-radius: 100px;
  background-color: black;
  color: white;
  width: 100%;
  letter-spacing: 0.5em;
  line-height: 1.4em;
  font-weight: bold;
}
@media screen and (max-width: 960px) {
  .contact-section-container {
    padding: 80px 0;
    width: 86%;
  }
  .contact-section-container .contact-description {
    font-size: 14px;
  }
  label {
    font-size: 14px;
  }
}
@media screen and (max-width: 540px) {
  .contact-section-container {
    padding: 60px 0;
    width: 86%;
  }
  .contact-section-container .contact-description {
    font-size: 14px;
  }
  .contact-section-container .contact-title {
    font-size: 16px;
    margin: 0 0 20px;
  }
  .contact-section-container .phone-box h2 {
    font-size: 20px;
  }
  .contact-section-container .phone-box p {
    letter-spacing: 0.05em;
    font-size: 12px;
  }
  .contact-section-container .submit {
    padding: 20px 40px;
    font-size: 14px;
  }
}