body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 600px;
    background: linear-gradient(to top right, #3d4752, #1983c5, #3d4752, #1983c5);
}

.calculator {
    background-color: #0b294221;
    padding: 1rem;
    border-radius: 10px;
    box-shadow: 1rem 1rem 0.3rem #1a344a;
}

.calculator-screen {
    width: 300px;
    font-size: 24px;
    text-align: right;
    margin-bottom: 1rem;
    border: none;
    border-style: none;
    background-color: #1a344a;
    color: white;
    border-radius: 5px;
    padding: 0.5rem;
}

.calculator-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.7rem;
}

.btn {
    font-size: 18px;
    height: 65px;
    border: none;
    border-radius: 5px;
    background-color: #22415d;
    cursor: pointer;
    color: white;
}

.btn:hover {
    background-color: #1e3e5b;
}

.btn-result {
    grid-column: span 4;
}



@media only screen and (max-width: 600px) {
    body {
        background-color: #1983c5;
        height: 650px;
        width: 350px;
        display: flex;
        justify-content: center;
        align-items: center;
    }
}

@media only screen and (min-width: 601px) and (max-width: 1024px) {
    body {
        height: 90vh;
        width: 100%;
        font-family: sans-serif;
        display: flex;
        justify-content: center;
        align-items: center;
        background-color: #1983c5;
    }
}