Box-shadow 1
RUN
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <style type="text/css"> h2{ height: 100px; width: 200px; box-shadow: 0px 0px 10px red; } </style> </head> <body> <h2></h2> </body> </html>
PHÓNG TO