mobile version of my website takes too long to load may be affected by css edit

Site URL: https://www.rubenalza.com

i have added a few css edtinting into my webpage but for some reason it takes too long to load on the mobile version, is there anything im doing wrong that provokes this?

this are the css added:
 

#collection-5d9eb3727ec40569f73dddd1 .Index-page:first-child .Index-page-content {

  padding-bottom : calc( 60px / 2 );
  
  }

#collection-5d9eb3727ec40569f73dddd1 .Index-page:first-child [class*=sqs-col] .sqs-block {

  padding-left : 0;
  padding-right : 0;
  
  }

@media screen and ( min-width : 641px) {

  #collection-5d9eb3727ec40569f73dddd1 .Index-page:first-child .Index-page-content {
  
    padding-top : 0;
    
    }
  }

.sqs-gallery-design-strip .sqs-wrapper img:not(:last-child) {
    padding-right: 5px; 
}

@media screen and (max-width:640px) {
.collection-5d9eb3727ec40569f73dddd1 {
    margin-top: 0 !important;
}
.tweak-mobile-bar-top-fixed .Mobile-bar--top {
    background: transparent;
}
.tweak-mobile-bar-menu-icon-vertical-dots .Mobile-bar-menu .Icon--dots-vertical {
    fill: white !important;
}}

@media screen and (max-width:640px) {
div#block-yui_3_17_2_1_1612658201191_6351>div {
    padding-bottom: 150% !important;
}
}

----------------------------

#collection-5d9eb6a9be640e33237752cb .Index-page:first-child .Index-page-content {

  padding-bottom : calc( 60px / 2 );
  
  }

#collection-5d9eb6a9be640e33237752cb .Index-page:first-child [class*=sqs-col] .sqs-block {

  padding-left : 0;
  padding-right : 0;
  
  }

@media screen and ( min-width : 641px) {

  #collection-5d9eb6a9be640e33237752cb .Index-page:first-child .Index-page-content {
  
    padding-top : 0;
    
    }
  }

@media screen and (max-width:640px) {
div#block-4677414d5231f5915278>div {
    padding-bottom: 150% !important;
}
}

@media screen and (max-width:640px) {
.collection-5d9eb6a9be640e33237752cb {
    margin-top: 0 !important;
}
.tweak-mobile-bar-top-fixed .Mobile-bar--top {
    background: transparent;
}
.tweak-mobile-bar-menu-icon-vertical-dots .Mobile-bar-menu .Icon--dots-vertical {
    fill: white !important;
}}

The above CSS won't affect speed.

Have you solved this yet?