import urllib.request, re
url='http://127.0.0.1:5000/static/css/design.css'
data = urllib.request.urlopen(url, timeout=5).read().decode('utf-8','replace')
opens = data.count('{')
closes = data.count('}')
print('open braces:', opens, 'close braces:', closes, 'balanced:', opens==closes)
kfs = re.findall(r'@keyframes\s+(\w+)', data)
print('keyframes found:', kfs)
# check for stray/incomplete rules
print('fightskillBgDrift defined:', '@keyframes fightskillBgDrift' in data)