.output{
    width: 400px;
    height: 100px;
    background-color:#283739;
    font-size: xx-large;
    font-family: monospace;
}
p{
    margin:0px;
    color:white;
    display: flex;
    align-items: center;
    justify-content: right;
}

button{
    height: 100px;
    width: 100px;
    background-color:#a2c11c;
   border-color: #283739;
   border-style: double;
   font-size: xx-large;
   font-family: monospace;
  
}
button:hover{
    filter: brightness(125%);
}
.C{
    height: 100px;
    width: 200px;
}
.operator{
    border-right: 0;
    background-color: #2c5d63;
    color: #a2c11c;
    font-size: 50px;
}
button:nth-child(1),
button:nth-child(4),
button:nth-child(8),
button:nth-child(12),
button:nth-child(16){
    border-left:0;
  }
button:last-child{
    border-bottom: 0;
}
  
.Zero{
    height: 100px;
    width: 300px;
    border-bottom: 0;
}
.buttons{
    width: 400px;
    height: 500px;
    display: flex;
    flex-wrap: wrap;
}