body{margin:0;font-family:Arial,Helvetica,sans-serif;background-color:#fff;color:#000}.app-container{max-width:1000px;margin:0 auto;padding:20px}.header{display:flex;align-items:center;gap:20px;margin-bottom:40px}.logo{height:250px;width:auto}.section{margin-bottom:50px}.section h2{margin-bottom:15px}.video{width:100%;max-height:800px;object-fit:cover;border-radius:4px}.video-description{margin-top:15px}.diagram{width:100%;border-radius:4px}.about{display:flex;align-items:center;gap:30px}.profile-image{width:180px;border-radius:6px}.footer{margin-top:60px;padding-top:20px;border-top:1px solid #ccc;text-align:center;font-size:14px}p{font-size:22px;line-height:1.6}H1{font-size:46px}