body{margin:0;font-family:system-ui,sans-serif;color:#222;line-height:1.5;}.video-section-header{text-align:center;padding:2rem 1rem 1rem;}.video-section{max-width:760px;margin:0 auto 3rem;padding:0 1rem;}.video-section h2{margin:0 0.5rem;font-size:1.5rem;}.video-section{display:block;width:100%;max-width:640px;margin:0 auto 1rem;border-radius:12px;box-shadow:0 4px 12px rgba(0,0,0,.15);}
pre{background:#272822;color:#f8f8f2;padding:.75rem 1rem;overflow-x:auto;border-radius:6px;font-size:.9rem;}
code{font-family:ui-monospace,SFMono-Regular,Consolas,"Liberation Mono",monospace;}.btn{display:inline-block;margin-top:.5rem;padding:.5rem 1rem;background:#0366d6;color:#fff;border:none;border-radius:6px;cursor:pointer;font-size:1rem;}.btn:hover{background:#024fa4;}