nav{font-size:18px;font-weight:700}nav a{color:#00f}main{font:21px Verdana;padding:21px}main h1{margin-bottom:8px;text-align:center}main h2{margin:34px 10px -10px;color:gray}main h3{color:#555}main h4{margin:34px 10px 10px}main a{color:#0070e2}main a:hover{color:#09447a}main button{background-color:#325a33;border:none;color:#fff;padding:8px 13px;text-align:center;text-decoration:none;display:inline-block;font-size:16px;cursor:pointer;transition-duration:.4s;border:1px solid Green}main button.btn-small{height:21px;padding:3px;font:13px Verdana}main button:hover{background-color:#fff;color:#000;border:1px solid Gray}main sup{color:#ff4500;font-weight:700;font-size:14px}main i{font:21px Times}main em{font-family:Arial;color:#ff4500}.center{text-align:center}input{height:25px;line-height:25px;background:#fcfcfc;font:20px Arial}select{height:30px;line-height:30px;background:#fcfcfc;font:18px Arial}input[type=checkbox],input[type=radio]{width:15px;height:15px}pre:has(code){background-color:#eee;padding:5px;border:1px solid gray;width:50%}code{color:purple;font:15px Courier;font-weight:700}