.row{
    margin: 0;
}

.form-control:disabled {
    background-color: #222;;
    color: white;
    opacity: 1;
}
.calculadora {
    margin: 40px auto;
    border: solid 1px #000;
    padding: 20px;
    background-color: #333;
    border-radius: 10px;
    box-shadow: 1px 1px 7px #00000095;
}

.btn {
    margin: 0;
    width: 60px;
    height: 50px;
    margin: 5px;
    box-shadow: 1px 1px 1px #000;
    border-radius: 5px;
    border: none;
    background-color: #555;
    color: #fff;
    cursor: pointer;
    transition: all 0.5s ease;
}

.btn:hover {
    background-color: #888;
}

.btn:active {
    background-color: #333;
    transform: scale(0.95);
    transition: transform 0.1s;
}

.btn-number {
    background-color: #444;
}

.btn-number:hover {
    background-color: #777;
}

.btn-number:active {
    background-color: #222;
    transform: scale(0.95);
    transition: transform 0.1s;
}


.clear {
    background-color: #666;
    width: 130px;
}

.enter {
    background-color: #666;
    height: 110px;
}

.zero {
    width: 130px;
}

.resultado {
    text-align: right;
    font-size: 1.1rem;
    margin-top: 10px;
    margin-bottom: 20px;
    border: solid 1px black;
    box-shadow: 1px 1px 3px inset black;
    /* font-family: 'Courier New', Courier, monospace; */
    font-family: 'Orbitron', 'Courier New', Courier, monospace;
    font-weight: bold;
    

}

.resultado::placeholder {
    color: white;
    font-family: 'Orbitron', 'Courier New', Courier, monospace;
    /* font-family: 'Courier New', Courier, monospace; */
    font-weight: bold;
}

#historico {
    margin-top: 20px;
    color: white;
    text-align: left;
    overflow-y: auto;
    max-height: 200px;
    transition: all 1s ease-out;
}

#botaoLimpar{
    width: 100%;
    height: auto;
    text-align: center;
    font-size: 12px;
    color: white;
}