body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
    font-family: Arial, sans-serif;
}

.container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-form {
    background-color: #fff;
    padding: 30px;
    border-radius: 5px;
    box-shadow: 0px 0px 10px 0px #000;
}

.input-group {
    margin-bottom: 10px;
    position: relative;
}

.input-group input {
    width: 100%;
    padding: 10px;
    box-sizing: border-box;
    border-radius: 5px;
    border: 1px solid #ccc;
}

.input-group span {
    position: absolute;
    top: 10px;
    left: 10px;
    transition: 0.5s;
}

.input-group input:focus + span {
    transform: translateY(-20px);
    font-size: 12px;
}

button {
    width: 100%;
    padding: 10px;
    border: none;
    border-radius: 5px;
    margin-top: 10px;
    cursor: pointer;
}

button[type="submit"] {
    background-color: #4CAF50;
    color: #fff;
}

.google-btn {
    background-color: #dd4b39;
    color: #fff;
    margin-top: 15px;
}

@media (prefers-color-scheme: dark) {
    body {
        background-color: #333;
    }

    .login-form {
        background-color: #444;
        color: #fff;
    }

    .input-group input {
        background-color: #555;
        color: #fff;
    }

    .input-group span {
        color: #fff;
    }

    button[type="submit"] {
        background-color: #4CAF50;
    }

    .google-btn {
        background-color: #dd4b39;
    }
}