* {
    box-sizing: border-box;
}

body {
    font-family: "Helvetica Neue", sans-serif;
    margin: 25px;
}

.calculadora {
    background: black;
    border-radius: 50px;
    color: white;
    height: 880px;
    padding: 20px;
    position: relative;
    width: 433px;
}

.partearriba {
    height: 100px;
    margin-top: -5px;
    margin-left: 4px;
}

.display {
    font-size: 100px;
    margin-bottom: 0px;
    margin-right: 20px;
    text-align: right;
    height: 135px;
}

#boton {
    align-items: center;
    background: #333;
    border-radius: 50%;
    border: 0;
    display: flex;
    font-size: 40px;
    height: 80px;
    justify-content: center;
    width: 80px;
    color: white;
}

.coma{
    align-items: center;
    background: #333;
    border-radius: 50%;
    border: 0;
    display: flex;
    font-size: 40px;
    height: 80px;
    justify-content: center;
    width: 80px;
    color: white;
}

.funcion {
    align-items: center;
    background: #a5a5a5;
    border-radius: 50%;
    border: 0;
    display: flex;
    font-size: 35px;
    height: 80px;
    width: 80px;
    justify-content: center;
    color: black;
}

#porcentaje{
    align-items: center;
    background: #a5a5a5;
    border-radius: 50%;
    border: 0;
    display: flex;
    font-size: 35px;
    height: 80px;
    width: 80px;
    justify-content: center;
    color: black;
}

#operador {
    align-items: center;
    background: #f1a33c;
    border-radius: 50%;
    border: 0;
    display: flex;
    font-size: 50px;
    height: 80px;
    width: 80px;
    justify-content: center;
    color: white;
}

.igual {
    align-items: center;
    background: #f1a33c;
    border-radius: 50%;
    border: 0;
    display: flex;
    font-size: 50px;
    height: 80px;
    width: 80px;
    justify-content: center;
    color: white;  
}

#numero0 {
    align-items: center;
    background: #333;
    border-radius: 50%;
    border: 0;
    display: flex;
    font-size: 40px;
    height: 80px;
    justify-content: center;
    width: 80px;
    border-radius: 50px;
    grid-column: 1 / span 2;
    justify-content: flex-start;
    padding-left: 30px;
    width: 190px;
    color: white;
}

.forma {
    margin-left: 5px;
    display: grid;
    grid-gap: 15px;
    grid-template-columns: repeat(4, 1fr);
}

.salir {
    width: 160px;
    height: 5px;
    background: white;
    border-radius: 4px;
    position: absolute;
    bottom: 11px;
    margin-left: 125px;
}

#boton:active,
#numero0:active,
#operador:active,
.funcion:active,
.igual:active,
.coma:active,
#porcentaje:active {
    filter: brightness(120%);
}