html,body,#root{height:100%}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial;background:#f8fafc;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{color:inherit}.lesson-content{color:#1a202c;font-size:1rem}.lesson-content p{margin:0 0 .75rem;line-height:1.6}.lesson-content h3{margin:1rem 0 .5rem}.lesson-content .video-wrapper{margin:1rem auto;position:relative;aspect-ratio:16 / 9;padding-bottom:56.25%;height:0;overflow:hidden}@media (max-width: 768px){.lesson-content .video-wrapper{width:100%;max-width:100%;margin:.75rem 0}}.lesson-content .video-wrapper iframe,.lesson-content .video-wrapper video{position:absolute;top:0;left:0;width:100%;height:100%;border:0}