body { font-family: Arial, sans-serif; margin: 2em; background: #f7f7f7; }
h1 { color: #1877f2; }
form { margin-bottom: 2em; }
#embed-result { margin-top: 2em; background: #fff; padding: 1em; border-radius: 8px; box-shadow: 0 2px 8px #0001; }