main {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    width: 100%;
  }
  
  .speed_container1 {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    height: 100%;
    border: solid;
    margin: 0 auto;
    padding: 20px;
    box-sizing: border-box;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.4);
    background-color: #051118;
    color: whitesmoke;
  }
  
  .speed_body1 {
    border-radius: 50%;
    padding: 20px;
    width: 100px;
    height: 100px;
    border: solid;
    border-color: rgb(35, 216, 83);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 30px rgba(255, 255, 255, 1);
  }
  
  #speed_counter {
    width: 100px;
    background-color: transparent;
    text-align: center;
    font-size: 20px;
    outline: none;
    border: none;
  }
  
  .speed_body1 button {
    border: none;
    background-color: rgb(255, 249, 249);
    box-shadow: 0 0 30px rgba(255, 255, 255, 1);
    border-radius: 8px;
    max-width: 100px;
  }
  
  input {
    color: whitesmoke;
  }
  
  .speed_head {
    margin-bottom: 10px;
  }
  
  .speed_body {
    margin-bottom: 10px;
  }
  
  .speed_footer {
    display: flex;
    justify-content: space-between;
    padding: 10px;
    margin: 0;
  }
  
  .speed_details {
    margin: 0;
    flex: 1;
    padding-right: 10px;
    border-right: solid;
    width: 100%;
    display: flex;
    align-items: center;
  }
  
  .speed_details input[type="text"] {
    width: 80px;
    height: 30px;
    border: none;
    outline: none;
    text-align: center;
    font-size: 20px;
    background-color: transparent;
  }
  
  .speed_details strong {
    padding-right: 5px;
  }
  
  hr {
    border-color: rgb(255, 255, 255);
    width: 100%;
    padding: 0;
  }
  
  @media only screen and (max-width: 768px) {
    .speed_container1 {
      width: 80%;
      margin: 10%;
    }
    .speed_body1 {
      width: 100px;
      height: 100px;
    }
    .speed_details {
      flex-direction: column;
      align-items: center;
    }
    .speed_details input[type="text"] {
      width: 100%;
    }
    .speed_body1 button {
      font-size: 14px;
    }
  }
  
  @media only screen and (max-width: 480px) {
    .speed_container1 {
      width: 90%;
      margin: 5%;
    }
    .speed_body1 {
      width: 80px;
      height: 80px;
    }
    .speed_details {
      flex-direction: column;
      align-items: center;
    }
    .speed_details input[type="text"] {
      width: 100%;
      font-size: 14px;
    }
    .speed_body1 button {
      font-size: 14px;
    }
  }