buttons style : demo 33

CSS

                        .btn{
                            position: relative;
                            border-radius: 0;
                            text-transform: uppercase;
                            overflow: hidden;
                        }
                        .btn:before{
                            content: "";
                            width: 100%;
                            position: absolute;
                            top: 0;
                            left: 0;
                            transition: all 0.30s ease 0s;
                        }
                        .btn:hover:before{
                            top: 85%;
                        }
                        .btn.red{
                            border: 1px solid #ff3939;
                            color: #ff3939;
                        }
                        .btn.red:before{
                            border: 4px solid rgba(255,57,57,0.3);
                        }
                        .btn.blue{
                            border: 1px solid #3fb7c8;
                            color: #3fb7c8;
                        }
                        .btn.blue:before{
                            border: 4px solid rgba(63,183,200,0.3);
                        }
                        .btn.orange{
                            border: 1px solid #f88030;
                            color: #f88030;
                        }
                        .btn.orange:before{
                            border: 4px solid rgba(248,128,48,0.3);
                        }
                        .btn.green{
                            border: 1px solid #35c568;
                            color: #35c568;
                        }
                        .btn.green:before{
                            border: 4px solid rgba(53,197,104,0.3);
                        }
                        @media screen and (max-width: 767px){
                            .btn{ margin-bottom: 15px; }
                        }
                    
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