body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    background-image: url(bcg.png);
    background-size: cover;
}

.main_container {
    width: 300px;
    background-color: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
}


.screen input {
    width: 100%;
    height: 50px;
    font-size: 24px;
    text-align: left;
    padding: 10px;
    border: none;
    border-bottom: 2px solid #ddd;
    outline: none;
}

button {
    width: 18%;
    height: 50px;
    margin: 5px 1%;
    font-size: 18px;
    background-color: #f0f0f0;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.2s;
}

button:hover {
    background-color: #ddd;
}

.second_row, .Third_row, .Forth_row, .fifth_row {
    display: flex;
    justify-content: space-between;
    margin-top: 10px;
}