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