html, body {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    height: 100vh;
    display: flex;
    justify-content: center;    
    align-items: center;
    background-color: #343a40;
}

#container {
    height: 800px;
    width: 430px;
    background: black;
    border: 3px solid rgb(74, 74, 74);
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-evenly;
    align-items: center;
    box-shadow: 0px 0px 20px 10px rgba(0, 0, 0, 0.765);
}

#screen {
    width: 400px;
    height: 250px;
    display: flex;
    flex-direction: column;
    justify-content: end;
    align-items: center;
    /* background-color: #343a40; */
    /* border-radius: 20px;
    border: 3px solid gray; */
}



#input {
    width: 380px;
    padding: 10px;
    text-align: right;
    font-size: 5rem;
    color: white;
    font-family: monospace;
    overflow-x: auto;
    white-space: nowrap;
    scrollbar-width: none;
}

#result {
    width: 380px;
    height: auto;
    overflow: hidden;
    padding: 0px 10px;
    text-align: end;
    font-size: 3rem;
    font-family: monospace;
    color: #a6a6a6;
}

#cmd {
    height: 500px;
    width: 400px;
    display: grid;
    grid-template-rows: 92px 92px 92px 92px 95px;
    grid-template-columns: 92.5px 92.5px 92.5px 92.5px;
    row-gap: 10px;
    column-gap: 10px;
}


#zero {
    grid-column: 1 / 3;
    padding: 30px;
}

#zero button {
    justify-content: start;
}

.btn.lgray {
    background-color: #a6a6a6;
    transition: all 0.3s ease;
}

.btn.lgray:hover {
    background-color: #545353;
}

.btn.orange {
    background-color: #ff9f0a;
    transition: all 0.3s ease;
}

.btn.orange:hover {
    background-color: #ad6a06;
}

.btn {
    background-color: #333333;
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50px;
    font-family: monospace;
    font-size: 3rem;
    transition: all 0.3s ease;
}

.btn:hover {
    background-color: #696969;
}

.btn button {
    width: 100%;
    height: 92px;
    border: none;
    background: none;
    color: inherit;
    font-size: inherit;
    font-family: inherit;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
}