* {
      padding: 0;
      margin: 0;
      box-sizing: border-box;
  }

  body {
      display: flex;
      align-items: center;
      justify-content: center;
      background-color: #f2f4f7;
      color: #1c1e21;
      font-family: Arial, Helvetica, sans-serif;
      min-height: 100vh;
      padding: 20px;
  }

  .main-content {
      display: flex;
      align-items: center;
      gap: 30px;
      position: relative;
      left: 0;
      flex-wrap: wrap;
  }

  .main-content h1 {
      color: #0866ff;
      font-size: 60px;
      font-family: Arial, sans-serif;
  }

  /* form container */
  form {
      display: flex;
      align-items: center;
      flex-direction: column;
      gap: 20px;
      justify-content: center;
      background-color: #fff;
      box-shadow: rgba(0, 0, 0, 0.24) 0px 3px 8px;
      max-width: 400px;
      width: 100%;
      border-radius: 10px;
      padding: 20px;
  }

  .h1 {
      font-size: 25px;
      text-align: center;
  }

  .fp {
      color: gray;
      font-size: 15px;
      text-align: center;
  }

  .name {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
      width: 100%;
  }

  .surname {
      height: 40px;
      flex: 1 1 45%;
      min-width: 140px;
      outline: none;
      border: solid 1px rgb(204, 203, 203);
      font-size: 15px;
      padding: 10px;
      border-radius: 8px;
  }

  .surname:focus {
      outline: 1px solid black;
  }

  .date {
      display: flex;
      gap: 15px;
      flex-wrap: wrap;
      width: 100%;
  }

  .birth {
      font-size: 12px;
      color: rgb(61, 61, 61);
  }

  .sep {
      height: 40px;
      flex: 1 1 30%;
      min-width: 90px;
      outline: none;
      border: solid 1px rgb(204, 203, 203);
      font-size: 15px;
      padding: 10px;
      border-radius: 8px;
  }

  .sep:focus {
      outline: 1px solid black;
  }

  .custom {
      display: flex;
      gap: 15px;
      border: solid 1px rgb(204, 203, 203);
      padding: 10px;
      border-radius: 8px;
      flex-wrap: wrap;
  }

  .male {
      font-size: 15px;
  }

  .gp {
      font-size: 12px;
      color: rgb(61, 61, 61);
  }

  .noun {
      height: 40px;
      width: 100%;
      outline: none;
      border: solid 1px rgb(204, 203, 203);
      font-size: 15px;
      padding: 10px;
      border-radius: 8px;
  }

  .noun:focus {
      outline: 1px solid black;
  }

  .pp {
      font-size: 12px;
      color: rgb(61, 61, 61);
  }

  .password {
      flex-direction: column;
      display: flex;
      gap: 10px;
      width: 100%;
  }

  .gay {
      height: 40px;
      width: 100%;
      outline: none;
      border: solid 1px rgb(204, 203, 203);
      font-size: 15px;
      padding: 10px;
      border-radius: 8px;
  }

  .gay:focus {
      outline: 1px solid black;
  }

  .sp {
      font-size: 10px;
      color: rgb(61, 61, 61);
      text-align: center;
  }

  span {
      color: #0866ff;
  }

  .sign {
      font-family: Arial;
      font-size: 17px;
      text-decoration: none;
      color: white;
      text-align: center;
      border-radius: 4px;
      font-weight: 700;
      padding: 10px;
      width: 200px;
      background-color: #42b72a;
  }

  .app {
      color: #0866ff;
  }

  .app:hover {
      text-decoration: underline;
  }

  /* ============================= */
  /* Responsive Breakpoints */
  /* ============================= */

  /* Tablets */
  @media (max-width: 768px) {
      .main-content {
          flex-direction: column;
          align-items: center;
          text-align: center;
      }

      .main-content h1 {
          font-size: 40px;
      }
  }

  /* Mobile */
  @media (max-width: 480px) {
      .main-content h1 {
          font-size: 30px;
      }

      form {
          padding: 15px;
          gap: 15px;
      }

      .sign {
          width: 100%;
      }
  }