calculator.css

.calculator {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    background-color: #fff;
    font-family: 'Roboto', sans-serif;
  }
  
  .screen {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    justify-content: center;
    height: 100px;
    margin-bottom: 30px;
    background-color: #f0f0f0;
    color: #333;
    font-size: 60px;
    padding: 0 20px;
    box-shadow: 0px 5px 10px rgba(0, 0, 0, 0.2);
    border-radius: 10px;
  }
  
  .row {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 15px;
  }
  
  .button {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 80px;
    width: 80px;
    border: none;
    background-color: #f0f0f0;
    color: #333;
    font-size: 36px;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
    box-shadow: 0px 5px 10px rgba(0, 0, 0, 0.2);
    border-radius: 50%;
    margin-right: 15px;
  }
  
  .button:last-child {
    margin-right: 0;
  }
  
  .button:hover {
    background-color: #333;
    color: #fff;
  }
  
  .clear {
    background-color: #ff3333;
  }
  
  .number {
    background-color: #eee;
  }
  
  .operator {
    background-color: #b3b3b3;
  }
  
  .equals {
    background-color: #4caf50;
    color: #fff;
  }
  
  @media screen and (max-width: 600px) {
    .calculator {
      width: 100%;
      height: 100%;
    }
    .screen {
      font-size: 48px;
      height: 80px;
      margin-bottom: 15px;
    }
    .row {
      margin-bottom: 10px;
    }
    .button {
      height: 60px;
      width: 60px;
      font-size: 24px;
      border-radius: 50%;
      margin-right: 10px;
    }
    .button:last-child {
      margin-right: 0;
    }
  }