*, body, html {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif
    

}

.wrapper {
    
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0;
    padding: 0;
    width: 100%;
    
}

.calculator {
    margin-top: 10%;
    display: grid;
    
}

.btn {
    display: flex;
    font-size: 1.2em;
    cursor: pointer;
    justify-content: center;
    align-items: center;
    padding: 20px 30px;
    transition: all 0.3s ease-in;
    border: 0.3px solid rgba(251, 253, 255, 0.171);
    margin: 1px;
    box-shadow: rgba(0, 0, 0, 0.35) 0px 5px 15px;
    border-radius: 10%;
}

#input {
    width: 100%;
    height: 100px;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    color: #FDFEFE;
    padding-right: 10px;
    font-size: 3em;
    text-align: right;
    background-color: #2b2828;
    transition: all 0.3s ease-in;
    border-radius: 20px;
}


#buttons-container {
    display: grid;
    grid-template-columns: repeat(4, auto);
    text-align: center;
    

}
.btn-operator {
    background-color: #3a3a3a;
    color: #ffffff;
}

.btn-operator:hover {
    background-color: rgb(75, 75, 75) 
}

.btn-num {
    background-color: #b8b9b9;
    color: #ffffff;
}

.btn-num:hover {
    background-color: #515152;
}

.equal  {
    grid-row: span 2;
    background-color: #3a3a3a;
}

.dot {
    grid-column: span 2;
}