@media screen and (max-width: 600px) {
  .container {
    padding: 20px;
  }

  h1 {
    font-size: 24px;
  }

  h2 {
    font-size: 18px;
  }

  p {
    font-size: 14px;
  }

/*login */

  .login-form {
    margin: 120px auto;
    padding: 30px 5px 10px 5px;
    width: 95%;
    max-width: 360px;
    box-sizing: border-box;
  }

  .login-form input {
    max-width: 255px;
    width: 300px;
    max-height: 25px;
    height: 20px;
    font-size: 16px;
    padding: 10px;
  }

  .login-form button {
    padding: 14px;
    font-size: 16px;
  }

  .login-form a {
    font-size: 15px;
  }


/*register*/

  .register-form {
    margin: 120px auto;
    padding: 30px 20px;
    width: 90%;
    max-width: 360px;
    box-sizing: border-box;
  }

  .register-form label {
    width: auto;
    display: block;
    margin-bottom: 4px;
    font-size: 15px;
  }

  .register-form input {
    font-size: 16px;
    padding: 12px;
  }

  .register-form button {
    padding: 14px;
    font-size: 17px;
  }

  .register-form div {
    font-size: 15px;
    line-height: 1.8;
  }

  .register-form a {
    font-size: 15px;
  }
}

/*privacy terms*/

@media screen and (max-width: 768px) {
  .prirms-container {
    margin: 100px 20px;
    padding: 20px;
    border-radius: 8px;
  }

  .prirms-container h1 {
    font-size: 22px;
    padding-bottom: 8px;
  }

  .prirms-container h2 {
    font-size: 18px;
    margin-top: 30px;
    padding-left: 10px;
    border-left: 4px solid #079;
  }

  .prirms-container p {
    font-size: 14px;
    margin-top: 16px;
  }
}

/*confirm-code*/
@media (max-width: 600px) {
  .confirm-form {
    margin: 140px 20px 80px 20px; /* 余白を小さめに */
    padding: 20px;
  }

  .confirm-form input[type="text"],
  .confirm-form button {
    font-size: 14px; /* 少し小さめに */
  }
}

/*
*confilm-link
*/
@media (max-width: 600px) {
  .c-link {
    margin: 80px 20px;
    padding: 25px;
  }

  .c-link h1 {
    font-size: 20px;
  }

  .c-link p {
    font-size: 14px;
  }

  .c-link a {
    font-size: 14px;
  }
}