body {
    font-family: Lucida Console, monospace;
    display: flex;
    justify-content: center;
    height: 100vh;
    margin: 0;
    background-color: #f4f4f4;
}

.container {
    text-align: center;
    padding: 20px;
}

h1 {
    font-size: 1.5em;
    margin-bottom: 30px;
    text-align: left;
    color: #444;
}

.calculator {
    display: flex;
    align-items: center;
}

.calculator span {
    font-size: 1.2em;
}

.calculator input {
    width: 150px;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 6px;
    text-align: center;
    font-size: 1.5em;
}

.calculator span.x {
    font-size: 2em;
    color: #ccc;
    padding: 0 30px;
}

#result, #result2 {
    font-size: 2.2em;
    font-weight: bold;
    color: #000;
}

.calculator.calc1 {
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 2px solid #ddd;
}


@media screen and (max-width: 768px) {
    h1 {
        font-size: 1.2em;
        text-align: center;
        line-height: 1.2em;
    }
    .calculator {
        flex-direction: column;
    }
    .calculator input {
        width: 86%;
        margin-bottom: 20px;
    }
    .calculator span.x {
        display: none;
    }
    #result {
        margin-top: 10px;
    }

}