WordPress Floating Pages (Shadow Effect from Demo) what am I missing here..?

Go to appearance->editor and look for a section called .main-wrapper. Add this line in between the squiggly brackets:

box-shadow: 0px 0px 0 #e2e5e5,1px 1px 0 #e2e5e5,2px 2px 0 #e2e5e5,3px 3px 0 #e2e5e5,4px 4px 0 #e2e5e5,5px 5px 0 #e2e5e5,6px 6px 0 #e2e5e5,7px 7px 0 #e2e5e5,8px 8px 0 #e2e5e5,9px 9px 0 #e2e5e5,10px 10px 0 #e2e5e5,11px 11px 0 #e2e5e5,12px 12px 0 #e2e5e5,13px 13px 0 #e2e5e5,14px 14px 0 #e2e5e5,15px 15px 0 #e2e5e5,16px 16px 0 #e2e5e5,17px 17px 0 #e2e5e5,18px 18px 0 #e2e5e5,19px 19px 0 #e2e5e5,20px 20px 0 #e2e5e5,21px 21px 0 #e2e5e5,22px 22px 0 #e2e5e5,23px 23px 0 #e2e5e5,24px 24px 0 #e2e5e5,25px 25px 0 #e2e5e5,26px 26px 0 #e2e5e5,27px 27px 0 #e2e5e5,28px 28px 0 #e2e5e5,29px 29px 0 #e2e5e5,30px 30px 0 #e2e5e5,31px 31px 0 #e2e5e5,32px 32px 0 #e2e5e5,33px 33px 0 #e2e5e5,34px 34px 0 #e2e5e5,35px 35px 0 #e2e5e5,36px 36px 0 #e2e5e5,37px 37px 0 #e2e5e5,38px 38px 0 #e2e5e5,39px 39px 0 #e2e5e5,40px 40px 0 #e2e5e5,41px 41px 0 #e2e5e5,42px 42px 0 #e2e5e5,43px 43px 0 #e2e5e5,44px 44px 0 #e2e5e5,45px 45px 0 #e2e5e5,46px 46px 0 #e2e5e5,47px 47px 0 #e2e5e5,48px 48px 0 #e2e5e5,49px 49px 0 #e2e5e5,50px 50px 0 #e2e5e5,51px 51px 0 #e2e5e5,52px 52px 0 #e2e5e5,53px 53px 0 #e2e5e5,54px 54px 0 #e2e5e5,55px 55px 0 #e2e5e5,56px 56px 0 #e2e5e5,57px 57px 0 #e2e5e5,58px 58px 0 #e2e5e5,59px 59px 0 #e2e5e5,60px 60px 0 #e2e5e5,61px 61px 0 #e2e5e5,62px 62px 0 #e2e5e5,63px 63px 0 #e2e5e5,64px 64px 0 #e2e5e5,65px 65px 0 #e2e5e5,66px 66px 0 #e2e5e5,67px 67px 0 #e2e5e5,68px 68px 0 #e2e5e5,69px 69px 0 #e2e5e5,70px 70px 0 #e2e5e5,71px 71px 0 #e2e5e5,72px 72px 0 #e2e5e5,73px 73px 0 #e2e5e5,74px 74px 0 #e2e5e5,75px 75px 0 #e2e5e5,76px 76px 0 #e2e5e5,77px 77px 0 #e2e5e5,78px 78px 0 #e2e5e5,79px 79px 0 #e2e5e5,80px 80px 0 #e2e5e5,81px 81px 0 #e2e5e5,82px 82px 0 #e2e5e5,83px 83px 0 #e2e5e5,84px 84px 0 #e2e5e5,85px 85px 0 #e2e5e5,86px 86px 0 #e2e5e5,87px 87px 0 #e2e5e5,88px 88px 0 #e2e5e5,89px 89px 0 #e2e5e5,90px 90px 0 #e2e5e5,91px 91px 0 #e2e5e5,92px 92px 0 #e2e5e5,93px 93px 0 #e2e5e5,94px 94px 0 #e2e5e5,95px 95px 0 #e2e5e5,96px 96px 0 #e2e5e5,97px 97px 0 #e2e5e5,98px 98px 0 #e2e5e5,99px 99px 0 #e2e5e5,100px 100px 0 #e2e5e5,101px 101px 0 #e2e5e5,102px 102px 0 #e2e5e5,103px 103px 0 #e2e5e5,104px 104px 0 #e2e5e5,105px 105px 0 #e2e5e5,106px 106px 0 #e2e5e5,107px 107px 0 #e2e5e5,108px 108px 0 #e2e5e5,109px 109px 0 #e2e5e5,110px 110px 0 #e2e5e5,111px 111px 0 #e2e5e5,112px 112px 0 #e2e5e5,113px 113px 0 #e2e5e5,114px 114px 0 #e2e5e5,115px 115px 0 #e2e5e5,116px 116px 0 #e2e5e5,117px 117px 0 #e2e5e5,118px 118px 0 #e2e5e5,119px 119px 0 #e2e5e5,120px 120px 0 #e2e5e5,121px 121px 0 #e2e5e5,122px 122px 0 #e2e5e5,123px 123px 0 #e2e5e5,124px 124px 0 #e2e5e5,125px 125px 0 #e2e5e5,126px 126px 0 #e2e5e5,127px 127px 0 #e2e5e5,128px 128px 0 #e2e5e5,129px 129px 0 #e2e5e5,130px 130px 0 #e2e5e5,131px 131px 0 #e2e5e5,132px 132px 0 #e2e5e5,133px 133px 0 #e2e5e5,134px 134px 0 #e2e5e5,135px 135px 0 #e2e5e5,136px 136px 0 #e2e5e5,137px 137px 0 #e2e5e5,138px 138px 0 #e2e5e5,139px 139px 0 #e2e5e5,140px 140px 0 #e2e5e5,141px 141px 0 #e2e5e5,142px 142px 0 #e2e5e5,143px 143px 0 #e2e5e5,144px 144px 0 #e2e5e5,145px 145px 0 #e2e5e5,146px 146px 0 #e2e5e5,147px 147px 0 #e2e5e5,148px 148px 0 #e2e5e5,150px 150px 0 rgba(0, 0, 0, 0);

Somehow wordpress overwrote that line from the theme, so this should add it back in. Let me know if that works for you.

.main-wrapper {
  backface-visibility: hidden;
  box-shadow: 0 0 0 #e2e5e5, 1px 1px 0 #e2e5e5, 2px 2px 0 #e2e5e5, 3px 3px 0 #e2e5e5, 4px 4px 0 #e2e5e5, 5px 5px 0 #e2e5e5, 6px 6px 0 #e2e5e5, 7px 7px 0 #e2e5e5, 8px 8px 0 #e2e5e5, 9px 9px 0 #e2e5e5, 10px 10px 0 #e2e5e5, 11px 11px 0 #e2e5e5, 12px 12px 0 #e2e5e5, 13px 13px 0 #e2e5e5, 14px 14px 0 #e2e5e5, 15px 15px 0 #e2e5e5, 16px 16px 0 #e2e5e5, 17px 17px 0 #e2e5e5, 18px 18px 0 #e2e5e5, 19px 19px 0 #e2e5e5, 20px 20px 0 #e2e5e5, 21px 21px 0 #e2e5e5, 22px 22px 0 #e2e5e5, 23px 23px 0 #e2e5e5, 24px 24px 0 #e2e5e5, 25px 25px 0 #e2e5e5, 26px 26px 0 #e2e5e5, 27px 27px 0 #e2e5e5, 28px 28px 0 #e2e5e5, 29px 29px 0 #e2e5e5, 30px 30px 0 #e2e5e5, 31px 31px 0 #e2e5e5, 32px 32px 0 #e2e5e5, 33px 33px 0 #e2e5e5, 34px 34px 0 #e2e5e5, 35px 35px 0 #e2e5e5, 36px 36px 0 #e2e5e5, 37px 37px 0 #e2e5e5, 38px 38px 0 #e2e5e5, 39px 39px 0 #e2e5e5, 40px 40px 0 #e2e5e5, 41px 41px 0 #e2e5e5, 42px 42px 0 #e2e5e5, 43px 43px 0 #e2e5e5, 44px 44px 0 #e2e5e5, 45px 45px 0 #e2e5e5, 46px 46px 0 #e2e5e5, 47px 47px 0 #e2e5e5, 48px 48px 0 #e2e5e5, 49px 49px 0 #e2e5e5, 50px 50px 0 #e2e5e5, 51px 51px 0 #e2e5e5, 52px 52px 0 #e2e5e5, 53px 53px 0 #e2e5e5, 54px 54px 0 #e2e5e5, 55px 55px 0 #e2e5e5, 56px 56px 0 #e2e5e5, 57px 57px 0 #e2e5e5, 58px 58px 0 #e2e5e5, 59px 59px 0 #e2e5e5, 60px 60px 0 #e2e5e5, 61px 61px 0 #e2e5e5, 62px 62px 0 #e2e5e5, 63px 63px 0 #e2e5e5, 64px 64px 0 #e2e5e5, 65px 65px 0 #e2e5e5, 66px 66px 0 #e2e5e5, 67px 67px 0 #e2e5e5, 68px 68px 0 #e2e5e5, 69px 69px 0 #e2e5e5, 70px 70px 0 #e2e5e5, 71px 71px 0 #e2e5e5, 72px 72px 0 #e2e5e5, 73px 73px 0 #e2e5e5, 74px 74px 0 #e2e5e5, 75px 75px 0 #e2e5e5, 76px 76px 0 #e2e5e5, 77px 77px 0 #e2e5e5, 78px 78px 0 #e2e5e5, 79px 79px 0 #e2e5e5, 80px 80px 0 #e2e5e5, 81px 81px 0 #e2e5e5, 82px 82px 0 #e2e5e5, 83px 83px 0 #e2e5e5, 84px 84px 0 #e2e5e5, 85px 85px 0 #e2e5e5, 86px 86px 0 #e2e5e5, 87px 87px 0 #e2e5e5, 88px 88px 0 #e2e5e5, 89px 89px 0 #e2e5e5, 90px 90px 0 #e2e5e5, 91px 91px 0 #e2e5e5, 92px 92px 0 #e2e5e5, 93px 93px 0 #e2e5e5, 94px 94px 0 #e2e5e5, 95px 95px 0 #e2e5e5, 96px 96px 0 #e2e5e5, 97px 97px 0 #e2e5e5, 98px 98px 0 #e2e5e5, 99px 99px 0 #e2e5e5, 100px 100px 0 #e2e5e5, 101px 101px 0 #e2e5e5, 102px 102px 0 #e2e5e5, 103px 103px 0 #e2e5e5, 104px 104px 0 #e2e5e5, 105px 105px 0 #e2e5e5, 106px 106px 0 #e2e5e5, 107px 107px 0 #e2e5e5, 108px 108px 0 #e2e5e5, 109px 109px 0 #e2e5e5, 110px 110px 0 #e2e5e5, 111px 111px 0 #e2e5e5, 112px 112px 0 #e2e5e5, 113px 113px 0 #e2e5e5, 114px 114px 0 #e2e5e5, 115px 115px 0 #e2e5e5, 116px 116px 0 #e2e5e5, 117px 117px 0 #e2e5e5, 118px 118px 0 #e2e5e5, 119px 119px 0 #e2e5e5, 120px 120px 0 #e2e5e5, 121px 121px 0 #e2e5e5, 122px 122px 0 #e2e5e5, 123px 123px 0 #e2e5e5, 124px 124px 0 #e2e5e5, 125px 125px 0 #e2e5e5, 126px 126px 0 #e2e5e5, 127px 127px 0 #e2e5e5, 128px 128px 0 #e2e5e5, 129px 129px 0 #e2e5e5, 130px 130px 0 #e2e5e5, 131px 131px 0 #e2e5e5, 132px 132px 0 #e2e5e5, 133px 133px 0 #e2e5e5, 134px 134px 0 #e2e5e5, 135px 135px 0 #e2e5e5, 136px 136px 0 #e2e5e5, 137px 137px 0 #e2e5e5, 138px 138px 0 #e2e5e5, 139px 139px 0 #e2e5e5, 140px 140px 0 #e2e5e5, 141px 141px 0 #e2e5e5, 142px 142px 0 #e2e5e5, 143px 143px 0 #e2e5e5, 144px 144px 0 #e2e5e5, 145px 145px 0 #e2e5e5, 146px 146px 0 #e2e5e5, 147px 147px 0 #e2e5e5, 148px 148px 0 #e2e5e5, 150px 150px 0 rgba(0, 0, 0, 0);
  transform-style: preserve-3d;
}

That is the CSS that is adding the shadow that you are looking for.

I have never seen that done before!

You could make a child theme and try adding that CSS to it or maybe, try a plugin that enables you to add CSS. It may also be the theme adds that function too.

Thank you so much guys this was really annoying me now I can get some work done ??