body.dark-theme {
    background-color: #1e1e1e;
    color: #ffffff;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}
.login-box {
    margin: 100px auto;
    width: 300px;
    padding: 20px;
    background-color: #2c2c2c;
    border-radius: 10px;
    box-shadow: 0 0 10px #000;
    text-align: center;
}
.login-box input, .login-box button {
    width: 90%;
    padding: 10px;
    margin: 10px 0;
}
.login-box button {
    background-color: #4CAF50;
    color: white;
    border: none;
}
footer {
    position: fixed;
    bottom: 0;
    width: 100%;
    background-color: #111;
    display: flex;
    justify-content: space-around;
    padding: 10px;
    font-size: 14px;
    color: #bbb;
}
.box {
    width: 300px;
    margin: 50px auto;
    padding: 40px;
    background-color: #333;
    color: white;
    text-align: center;
    cursor: pointer;
    border-radius: 8px;
    box-shadow: 0 0 8px black;
}
.box:hover {
    background-color: #444;
}