body{
    display: flex;
    justify-content: center;
}

.main_container {
    width:400px;
    /*height: 620px;*/  
    background: rgb(130,130,130);
    background: linear-gradient(180deg, rgb(79 52 101) 0%, rgba(29,34,37,1) 80%);
    border-radius: 60px;
    -webkit-box-shadow: -12px -6px 6px -13px #c9c9c9; 
    box-shadow: -9px -4px 6px -7px #c9cac9, 12px 10px 2px -7px #000000;;
}

.buton, .buton_operation{
    width:75px;
    height:80px;
    border-radius: 30%;
    background: #4d4d4d;
    border:0px;
    color:white;
    font-size: 25px;
    -webkit-box-shadow: -12px -6px 6px -13px #c9c9c9; 
    box-shadow: -8px -2px 2px -7px #c9cac9, 9px 4px 2px -7px #000000;;
  
}

.buttons {
    display:grid;
    grid-template-columns: 75px 75px 75px 75px;
    grid-template-rows: 80px 80px 80px 80px 80px;
    gap: 20px;
    justify-items: center;
    justify-content: center;
    margin-bottom:20px;
}

.buton:active, .buton_operation:active {
    background-color: #3e8e41;
    box-shadow: 0 5px #666;
    transform: translateY(4px);
}

.display{
    /*background-color: #3e8e41;*/
    width:360px;
    /*height:100px;*/
    /*margin-left:20px;*/
    margin: 0 20px 0 20px;
    color:white;
    font-size:20px;
}

.first_part_of_operation{
    height: 30px;
    margin-bottom: 0px;
    /*background-color: #48423b;*/
    display: flex;
    justify-content: right;
    align-items: center;
}

.display_number{
    /*background-color: #7a04a3;*/
    font-size:38px;
    margin: 0 0 0 0;
    font-weight: none;
    width: 360px;
    height: 60px;
    text-align: right;
    display: table-cell;
    vertical-align: MIDDLE;
}

.history_last_operation {
    margin-bottom: 0px;
    margin-top:0px;
    display:none;
    /*background-color: red;*/
    height: 25px;
    font-size:14.5px;
    text-align: right;
}

.history_other_operation{
    /*height: 25px;*/
    margin-bottom: 0px;
    margin-top:0px;
    /*background-color: #00bcd4;*/
    display: none;
    font-size:14.5px;
    text-align: right;
}

.history_other_operation > p {
    margin: 0 0 0 0;
    height: 25px;
    /*background-color: #8bc34a;*/
    font-size:14.5px;
    text-align: right;
}

.big_number{
    background-color: #7a04a3;
    margin: 0 0 0 0;
    font-weight: none;
    width: 360px;
    text-align: right;
}




#cancel {
    background-color: #ffc80e;
    box-shadow: none;
}

#operatiune {
    background-color: #7a04a3;
}