* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: 'Arial', sans-serif;
    background-color: #181818; /* Fundo escuro */
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
  }
  
  .container {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 30px;
    flex-wrap: wrap;
    margin-top: 50px;
  }
  
  .calculator {
    background: linear-gradient(145deg, #333, #555); /* Fundo com gradiente */
    width: 480px; /* Largura da calculadora */
    height: 770px; /* Altura aumentada */
    border-radius: 20px;
    padding: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
  }
  
  .display {
    width: 100%;
    height: 70px;
    font-size: 2rem;
    text-align: right;
    padding: 10px;
    margin-bottom: 20px;
    background-color: #222;
    color: white;
    border: none;
    border-radius: 10px;
  }
  
  .buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr); /* 4 colunas para botões */
    gap: 15px;
    width: 100%;
  }
  
  .button {
    background-color: #444;
    color: white;
    box-shadow: 0 4px 7px rgba(0, 0, 0, 0.2);
    font-size: 1.5rem;
    padding: 20px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
  }
  
  .button:hover {
    background-color: #666;
    transform: scale(1.1);
  }
  
  .operator {
    background-color: #fe7f2e;
  }
  
  .operator:hover {
    background-color: #f75e1e;
  }
  
  .equal {
    background-color: #2e8b57;
    grid-column: span 2; /* O botão de igual ocupa 2 colunas */
  }
  
  .equal:hover {
    background-color: #26733b;
  }
  
  button:active {
    transform: scale(0.95);
  }
  
  .info-panel {
    background-color: #333;
    color: white;
    width: 400px;
    padding: 35px;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
  }
  
  .info-panel h2, .info-panel h3 {
    color: #fe7f2e;
    margin-bottom: 10px;
  }
  
  .info-panel ul {
    list-style-type: none;
    padding-left: 20px;
  }
  
  .info-panel li {
    margin-bottom: 10px;
  }
  
  .info-panel p {
    color: #ccc;
    font-size: 1rem;
  }