/* Reset básico */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  /* Configurações de body e fonte */
  body {
    font-family: 'Poppins', sans-serif;
    background: #f5f6f7;
    color: #333;
    line-height: 1.6;
  }
  
  /* Container principal */
  .container {
    max-width: 600px;
    margin: 40px auto;
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  }
  
  /* Cabeçalho */
  h1 {
    text-align: center;
    margin-bottom: 25px;
    font-weight: 600;
    color: #2c3e50;
  }
  
  /* Grupos de input */
  .input-group {
    margin-bottom: 20px;
  }
  label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #555;
  }
  input[type="text"],
  select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.2s;
  }
  input[type="text"]:focus,
  select:focus {
    border-color: #1abc9c;
    outline: none;
  }
  
  /* Radio group */
  .radio-group {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    align-items: center;
  }
  .radio-group label {
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
  }
  .radio-group input[type="radio"] {
    margin-right: 6px;
    cursor: pointer;
  }
  
  /* Botão Calcular */
  button {
    display: block;
    width: 100%;
    padding: 12px;
    background: #1abc9c;
    border: none;
    color: #fff;
    font-size: 16px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    transition: background 0.3s;
  }
  button:hover {
    background: #16a085;
  }
  
  /* Área de resultado */
  .result {
    margin-top: 25px;
    background: #ecfdf5;
    border: 1px solid #d1fae5;
    border-radius: 4px;
    padding: 20px;
  }
  .result p {
    margin-bottom: 10px;
  }
  .highlight {
    color: #16a085;
    font-weight: 600;
  }
  
  /* Rodapé/Observação */
  .footer {
    text-align: center;
    margin-top: 40px;
    font-size: 14px;
    color: #777;
  }
  
  /* Responsividade básica */
  @media (max-width: 600px) {
    .container {
      margin: 20px;
      padding: 20px;
    }
    button {
      font-size: 15px;
    }
  }