reworked structure

assets/css/crt.css

@@ -139,22 +139,18 @@ http://aleclownes.com/2017/02/01/crt-display.html
     text-shadow: 2.6208764473832513px 0 1px rgba(0,30,255,0.1), -2.6208764473832513px 0 1px rgba(255,0,80,0.2), 0 0 3px;
   }
 }
-.crt::after {
+
+.crt-flicker {
   content: " ";
-  display: block;
-  position: absolute;
-  top: auto;
-  left: auto;
-  bottom: auto;
-  right: auto;
+  pointer-events: none;
+  animation: flicker 3s infinite;
   background: rgba(18, 16, 16, 0.1);
   opacity: 0;
   z-index: 2;
-  pointer-events: none;
-  animation: flicker 3s infinite;
-  width: 640px;
-  height: 480px;
+
 }
+
+/*
 .crt::before {
   content: " ";
   display: block;
@@ -168,6 +164,15 @@ http://aleclownes.com/2017/02/01/crt-display.html
   width: 640px;
   height: 480px;
 }
-.crt {
+*/
+.crt{
+  position: relative;
+  overflow: hidden;
+  height: 100%;
+  width: 100%;
+
+}
+
+.crt-shadow {
   animation: textShadow 5s infinite;
 }