Mitigating the damage from the new site theme

Update

This now fixes the issue with the syntax highlighting colors being wrong, too

Original

Here are screenshots of what this will do for you:

Basically I just tried to make it so what we care about (questions and answers) are what the site displays most prominently. I also got our old logo back, until that resource is destroyed at least.

How to Get

At Carl Lange's suggestion I installed the Stylus browser extension for Chrome.

Once you have that, you just make a new style and you can import this CSS (there's an Import button):

@-moz-document regexp("https://mathematica\\..*stackexchange.com/.*") { .pln{color:#326ab3}@media screen{.str{color:#833}.mma_msg{color:#833;font-style:italic}.mma_use{color:#833;font-weight:bold}.mma_iot{color:#555;font-weight:bold}.atn{color:#326ab3;font-weight:bold}.com{color:#555}.kwd{color:#000}.atv{color:#060;font-style:italic}.atn{color:#326ab3;font-weight:bold}.tag{color:#000;font-weight:bold}.lit{color:#833}.pln{color:#326ab3}.pun{color:#000}}@media print,projection{.str,.use,.msg{color:#833}.com{color:#555}.kwd{color:#000;font-weight:bold}.atv{color:#060;font-style:italic}.tag{color:#000;font-weight:bold}.lit{color:#833}.mma_use{color:#833;font-weight:bold}.mma_msg{color:#833;font-style:italic}.mma_iot{color:#555;font-weight:bold}.atn{color:#326ab3;font-weight:bold}.pun{color:#000}}pre.prettyprint{background:#EEE;padding:20px}ol.linenums{margin-top:0;margin-bottom:0}li.L0,li.L1,li.L2,li.L3,li.L5,li.L6,li.L7,li.L8{list-style-type:none}li.L1,li.L3,li.L5,li.L7,li.L9{background:#eee} #left-sidebar{ display: none } #mainbar { padding: 0px 25px; width: 100%; } #content { border: none; width: 100%; } #sidebar { display: none; } #hot-network-questions { display: none; } .community-bulletin, #newsletter-ad, .ad-container { display: none } } @-moz-document regexp("https://mathematica\\..*stackexchange\\.com/questions/.*") { #mainbar { padding: 0px 25px 0px 0px; width: calc(100% - 275px); } #sidebar { display: inline-block; width: 250px; } } @-moz-document regexp("https://mathematica\\..*stackexchange\\.com/questions/ask") { #mainbar { padding: 0px 25px 0px 25px; width: 100% } #mainbar.ask-mainbar { width: 100%; } #sidebar { display: none; } } @-moz-document url-prefix("https://mathematica.stackexchange.com") { .tabs-filter { display: none; } img.h-auto.wmx100 { width:0px; height:0px; margin: 15px 15px 15px 0px; padding: 30px 0px 30px 350px; background: url(https://cdn.sstatic.net/Sites/mathematica/img/[email protected]?v=37ecb83d823e); background-size: cover; } } 

All SE

Here's a theme that will apply across all StackExchange sites:

@-moz-document url-prefix("https://mathematica.stackexchange.com") { .pln{color:#326ab3}@media screen{.str{color:#833}.mma_msg{color:#833;font-style:italic}.mma_use{color:#833;font-weight:bold}.mma_iot{color:#555;font-weight:bold}.atn{color:#326ab3;font-weight:bold}.com{color:#555}.kwd{color:#000}.atv{color:#060;font-style:italic}.atn{color:#326ab3;font-weight:bold}.tag{color:#000;font-weight:bold}.lit{color:#833}.pln{color:#326ab3}.pun{color:#000}}@media print,projection{.str,.use,.msg{color:#833}.com{color:#555}.kwd{color:#000;font-weight:bold}.atv{color:#060;font-style:italic}.tag{color:#000;font-weight:bold}.lit{color:#833}.mma_use{color:#833;font-weight:bold}.mma_msg{color:#833;font-style:italic}.mma_iot{color:#555;font-weight:bold}.atn{color:#326ab3;font-weight:bold}.pun{color:#000}}pre.prettyprint{background:#EEE;padding:20px}ol.linenums{margin-top:0;margin-bottom:0}li.L0,li.L1,li.L2,li.L3,li.L5,li.L6,li.L7,li.L8{list-style-type:none}li.L1,li.L3,li.L5,li.L7,li.L9{background:#eee} img.h-auto.wmx100 { width:0px; height:0px; margin: 15px 15px 15px 0px; padding: 30px 0px 30px 350px; background: url(https://cdn.sstatic.net/Sites/mathematica/img/[email protected]?v=37ecb83d823e); background-size: cover; } } @-moz-document domain("stackexchange.com") { .unified-theme { padding-top: 0px; } .top-bar._fixed { position: relative; top: 0px; right: 0px; } #left-sidebar{ display: none; } #mainbar { padding: 0px 25px; width: 100%; } #content { border: none; margin: 0px; width: 100%; } #sidebar { display: none; } #hot-network-questions { display: none; } .community-bulletin, #newsletter-ad, .ad-container { display: none } .tabs-filter { display: none; } } @-moz-document regexp("https://.*stackexchange\\.com/questions/.*") { #mainbar { padding: 0px 25px 0px 0px; width: calc(100% - 304px); margin: 0px; } #sidebar { float: right; display: block; width: 280px; } .tabs-filter { display: initial; } } @-moz-document regexp("https://chat.stackexchange.com/.*") { #mainbar { padding: 0px 25px 0px 0px; width: 100%; } #sidebar { display: block; width: 28%; } .tabs-filter { display: initial; } } @-moz-document regexp("https://.*stackexchange\\.com/questions/ask") { #mainbar { padding: 0px 25px 0px 25px; width: 100% } #mainbar.ask-mainbar { width: 100%; } #sidebar { display: none; } }