Password page 3 x errors

[marycrichton123]

Hi all, 

I have created a password page to build excitement and collect emails: 

https://mishmash.world/password

1. I want to remove the timer, I have tried the following code: 

countdown-timer-block {
display: none !important;
}

.countdown_timer_wrapper_cm2u9n9df232681191lx3axb59f {
display: none !important;
}

2. I want to hide the thin white line between the header and body of the page 

3. I want to upload a different image for the background on a the mobile. 

4. on the mobile screen I would like the 'dream big, join early' text to be in the subtitle font, not the heading font 

Thank you much