body{font-family:Arial;margin:0;background:#eef3ef}header{background:#166534;color:#fff;padding:30px;text-align:center}main{max-width:700px;margin:20px auto;background:#fff;padding:20px;border-radius:10px}input,textarea,button{display:block;width:100%;margin:12px 0;padding:12px}button{background:#166534;color:#fff;border:0}