body { 
    font-family: Arial; 
    background: #111; 
    color: white; 
    display: flex; 
    justify-content: center; 
    align-items: center; 
    height: 100vh; 
}

.login-box {
    background: #222;
    padding: 30px;
    border-radius: 10px;
    width: 100%;
    max-width: 380px;
    box-sizing: border-box;
}

input {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    border: none;
    border-radius: 5px;
}

button {
    width: 100%;
    padding: 10px;
    background: #444;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background: #666;
}

@media (max-width: 480px) {
    .login-box {
        padding: 35px;
        max-width: 90%;
    }

    input, button {
        font-size: 18px;
        padding: 14px;
    }
}