Userstyle for the new "flat" Twitter.

meta-tag.js

(function() {
var jQueryLoader = function() {
    var watcherID;
    if (!(typeof $ === 'undefined')) {
      clearInterval(watchJqueryLoader);
      $("head").append("<meta name='viewport' content='width=device-width,initial-scale=1.0'>");
    }
  }
var watchJqueryLoader = setInterval(jQueryLoader, 100);
})();

pinboard-logo.css

/* your source here */

.instapaper-link a{
background-image: url(data:image/gif;base64,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) !important;
padding-left:20px;
background-repeat:no-repeat !important;
}

pinboard-userscript.js

(function(){window.pinboard={loadLink:function(){return $(".js-tweet-text .twitter-timeline-link").each(function(index,Element){var $parent,link,linkText,linkTextEncoded,theLink;$parent=$(Element).parents(".content");link=encodeURIComponent($(Element).attr("data-expanded-url"));linkText=$(Element).attr("data-expanded-url");linkTextEncoded=encodeURIComponent(linkText);theLink="<a href=\"javascript:void(t=open('https://pinboard.in/add?later=yes&noui=yes&jump=close&url="+link+"&title="+linkText+"','Pinboard','toolbar=no,width=100,height=100'));t.blur();\">Pinboard</a>";if($parent.children(".instapaper-link").length<$(".js-tweet-text .twitter-timeline-link",$parent).length){return $parent.append('<div class="instapaper-link">'+theLink+" ("+linkText+")</div>")}})},watcher:function(){if($(".tweet").length>pinboard.tweetNumber){return pinboard.loadLink()}},jQueryLoader:function(){var watcherID;if(!(typeof $==="undefined")){clearInterval(pinboard.watchJqueryLoader);pinboard.loadLink();pinboard.tweetNumber=$(".tweet").length;return watcherID=setInterval(pinboard.watcher,5e3)}},init:function(){return pinboard.watchJqueryLoader=setInterval(pinboard.jQueryLoader,100)}};window.onload=pinboard.init()}).call(this);

twitter-styles.css

.dashboard {
width: 100% !important;
float: none !important;
}

.wtf-module {
display: none !important;
}

.trends {
display: none !important;
}

.Footer {
display: none !important;
}

#timeline {
width: 100% !important;
}

.wrapper {
width: 100% !important;
}

.global-nav-inner > .container {
min-width: 0 !important;
}

#page-container {
padding-left: 0 !important;
padding-right: 0 !important;
}

.promoted-tweet, #user-dropdown {
display: none !important;
}

.modal {
width: 100% !important;
}

#discover-stories, .profile-card {
width: 100% !important;
}

.route-home .profile-summary, .route-home .content-header {
display: none !important;
}

.route-profile .enhanced-media-thumbnails {
display: none !important;
}