body {
    font-family: 'Roboto', sans-serif;
    font-size: 14px;
    background: #eee;
}

#login-form {
    width: 400px;
    margin: 200px auto 0 auto;
    padding: 24px;
    border: 1px solid #ccc;
    box-shadow: rgba(0, 0, 0, 0.15) 2px 4px 6px;
    border-radius: 6px;
}

    @media (max-width: 400px) {
        #login-form {
            width: auto;
            margin: 200px 12px 0 12px;
        }
    }

    #login-form div.field-group {
        margin-bottom: 0.6em;
    }

    #login-form input {
        width: 100%;
        font-size: 1.1em;
        border: 1px solid #666;
        border-radius: 3px;
    }

        #login-form div.field-group.error input {
            border-color: red;
        }

    #login-form span.error {
        color: red;
    }

    #login-form div.button-group {
        margin-top: 14px;
    }

    #login-form button {
        border: 1px solid #666;
        border-radius: 3px;
        font-size: 1em;
        cursor: pointer;
    }

        #login-form button:hover, #login-form button:active {
            background: #eee;
        }