@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-5px)}75%{transform:translate(5px)}}.container{background:#3a3a3a;border-radius:10px;width:100%;max-width:450px;padding:2rem;position:relative;top:50%;left:50%;transform:translate(-50%,1%);box-shadow:0 15px 30px #0000001a}.h2_resize,h1{text-align:center}h1{color:#007bf0}.h2_resize{margin-left:5px;margin-right:5px;padding-top:50px;font-size:1.5rem}.form-group{margin-bottom:1.5rem;position:relative}.form-group label{color:#fff;pointer-events:none;background:#3a3a3a;padding:0 5px;transition:all .2s;position:absolute;top:50%;left:15px;transform:translateY(-50%)}.form-group textarea+label{top:25px}.form-group input,.form-group textarea{box-sizing:border-box;color:#fff;background-color:#3a3a3a;border:1px solid #007bf0;border-radius:5px;outline:0;width:100%;padding:12px 15px;font-size:16px;transition:all .2s}.form-group textarea{resize:vertical;height:100px}.form-group input:focus,.form-group textarea:focus{border-color:#007bf0}.form-group input:focus+label,.form-group input:not(:placeholder-shown)+label,.form-group textarea:focus+label,.form-group textarea:not(:placeholder-shown)+label{color:#fff;font-size:12px;top:0}button:not(.button-simple){color:#fff;cursor:pointer;background:#00008b;border:0;border-radius:5px;width:100%;padding:12px;font-size:16px;transition:background .3s}button:not(.button-simple):hover{background:#00f}.form-group input:invalid:not(:placeholder-shown),.form-group textarea:invalid:not(:placeholder-shown){border-color:#ff6b6b;animation:.3s shake}.content-section{color:#fff;text-align:justify;max-width:1000px;margin:0 auto;padding:20px;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;font-size:20px;line-height:1.6}.content-section a{color:#fff;text-decoration:none}.content-section a:hover{text-decoration:underline}h3{color:#f5f5f5;margin-top:30px;margin-bottom:15px;font-size:1.6em}h4{color:#1976d2;margin-top:25px;font-size:1.4em}.code-block{white-space:pre-wrap;background:#333131;border-radius:5px;margin:15px 0;padding:15px;font-family:monospace}.feature-list{padding-left:20px}.feature-list li,h4{margin-bottom:10px}