.app-body{margin:10px;font-family:Arial,Helvetica,sans-serif;font-size:15px}nav{padding:15px;border:5px solid black;background-color:gray}ul{display:flex;justify-content:space-between;list-style:none;margin:0;padding:0}a{font-weight:700;color:#000;text-decoration:none}.page-header{display:block;text-align:center;margin:10px;font-weight:700}table{margin:auto;border-collapse:collapse}td{padding:10px;border:1px solid black;text-align:center}td.header{font-weight:700}.resource-form{padding:10px;border:1px solid black}.resource-form label,#book-search label{display:block}.search-button,.form-submit,.login-buttons{margin-top:10px;display:block}.login-buttons{display:flex}.error{color:red}.success{color:green}#book-search,.resource-form{max-width:fit-content;margin-inline:auto}.centered-pg{display:block;text-align:center}