*{
    box-sizing: border-box;
    margin: 0;
}

body{
    background-color: darkslategray;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

h1{
    text-align: center;
    color: white;
    margin-top: 50px;
}


.calculadora{
    background-color: #f2f2f2;
    padding: 20px;
    max-width: 400px;
    margin: 100px auto;
    border: 1px solid #ccc;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}


#resultado{
    width: 100%;
    padding: 10px;
    font-size: 24px;
    border: none;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3) inset;
    border-radius: 5px;
}

.botones{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-gap: 10px;
    margin-top: 20px;

}

button{
    padding: 10px;
    font-size: 24px;
    border: none;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
    border-radius: 5px;
    cursor: pointer;
}


button:hover{
    background-color: #ddd;
}

.borrar{
    background-color: #ff4136;
    color:white;
}

.numero{
    background-color: #fff;
}

.operador{
    background-color: slateblue;
    color:white;
}

.igual{
    background-color: olivedrab;
    grid-row: span 3;
    color: #fff;
}