body {
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #f0f0f0;
}

.calculator {
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    padding: 20px;
}

.display {
    background-color: #eee;
    border: 1px solid #ccc;
    border-radius: 5px;
    padding: 10px;
    font-size: 24px;
    text-align: right;
    margin-bottom: 20px;
}

.buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.number, .operator {
    background-color: #ddd;
    border: 1px solid #ccc;
    border-radius: 5px;
    padding: 10px;
    font-size: 18px;
    cursor: pointer;
}

.clear {
    background-color: #ff6666; /* Vermelho para limpar */
    color: white;
}

.operator {
    background-color: #f0f0f0; /* Cinza claro para operadores */
}

.operator:hover {
    background-color: #ddd;
}

.operator img {
  vertical-align: middle;
  margin-left: 7px;
}