#reading-progress-bar{position:fixed;top:0;left:0;width:0%;height:4px;background:linear-gradient(135deg,#e67e22 0%,#d35400 100%);z-index:99999;transition:width .1s ease-out;pointer-events:none}body.dark-mode #reading-progress-bar{background:linear-gradient(135deg,#d68c45 0%,#a63c06 100%);box-shadow:0 0 8px rgba(214,140,69,.6),0 0 15px rgba(211,84,0,.3)}