/* displays key part of CSS for this effect;) It's editable! And responsive! Это редактируемый текст! */ .crt { border-image: radial-gradient(#333, #000 10%,#ccc 10.5% 12%,#0000 12.5%) 45.5% fill /* cutting area width */ / 150px /* actual border width */ / 150px; /* transparent area outset */ }