body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    background-image: url(../img/equations_background.jpg);
    margin: 0;
}
h1, p {
    color: white;
}
.container {
    background: #282c34;
    padding: 20px;
    max-width: 35%;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    text-align: center;
}
@media (max-width: 600px) {
    .container {
        max-width: 80%;
        width: 80%;
        padding: 10px;
    }
}
.input-group {
    margin-bottom: 15px;
}
input[type="text"] {
    width: 50px;
    padding: 5px;
    margin: 5px;
    border-radius: 4px;
    border: 1px solid #ccc;
}
button {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    background: #007BFF;
    color: white;
    cursor: pointer;
}
button:hover {
    background: #0056b3;
}
#output {
    margin-top: 20px;
    font-size: 1.2em;
}