style.css

* {
    margin: 0;
    padding: 0;
  }
  
  body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: rgb(46 49 44);
  }
  
  #container {
    border: 1px solid black;
    width: 600px;
    margin: 40px auto;
    background-color: #22242C;
  }
  

  h1 {
    text-align: center;
  }
  
  #screen {
    display: block;
    margin: 10px auto;
    font-size: 2.6rem;
  }
  
  table {
    margin: 10px auto;
  }
  
  td {
    border-radius: 10px;
    box-shadow: 0px 0px 3px rgb(104, 104, 104);
    transition: 100ms;
    height: 70px;
    width: 80px;
  }
  
  table button {
    font-size: 2rem;
    width: 100%;
    height: 100%;
    border-radius: 10px;
  }
  
  button:focus {
    outline: none;
  }
  
  td:active {
    transform: scale(0.8);
  }

  #calculator{
    
  }

  #mode_sun{
    background-color: #22242C !important;
    font-size: 20px;
  }