bootstrap login form style : demo 17

CSS

                        .demo{ background: #e3e3e3; }
                        .form-bg{
                            padding: 8px;
                            background: #f0f4f7;
                            border: 4px solid #fff;
                            box-shadow: 0 0 0 3px #b3bcc1;
                            position: relative;
                        }
                        .form-horizontal{
                            padding: 40px 40px 0 40px;
                            background: #fff;
                            border: 3px solid #c0c9ce;
                        }
                        .form-bg:before,
                        .form-bg:after,
                        .form-horizontal:before,
                        .form-horizontal:after{
                            content: "";
                            width: 20px;
                            height: 20px;
                            border-radius: 50%;
                            background: #f0f4f7;
                            border: 3px solid transparent;
                            border-right: 3px solid #c0c9ce;
                            border-bottom: 3px solid #c0c9ce;
                            position: absolute;
                            top: 5px;
                            left: 5px;
                            z-index: 2;
                        }
                        .form-bg:after{
                            left: auto;
                            right: 5px;
                            transform: rotate(90deg);
                        }
                        .form-horizontal:before,
                        .form-horizontal:after{
                            top: auto;
                            bottom: 5px;
                            transform: rotate(-90deg);
                        }
                        .form-horizontal:after{
                            left: auto;
                            right: 5px;
                            transform: rotate(-180deg);
                        }
                        .form-horizontal .form-group{
                            margin: 0 0 15px 0;
                            position: relative;
                        }
                        .form-horizontal .form-group:first-child:before,
                        .form-horizontal .form-group:first-child:after{
                            content: "";
                            width: 10px;
                            height: 50px;
                            background: #fff;
                            background-image: repeating-linear-gradient( transparent, transparent 2px, #c9cbcc 2px, #c9cbcc 4px);
                            border-radius: 5px;
                            border: 2px solid #aaaeb1;
                            position: absolute;
                            bottom: -32px;
                            left: 20px;
                            z-index: 1;
                        }
                        .form-horizontal .form-group:first-child:after{
                            left: auto;
                            right: 20px;
                        }
                        .form-horizontal .form-group:last-child{
                            padding: 30px 40px;
                            margin: 30px -40px 0 -40px;
                            background: #fafafa;
                            border: 2px solid #fff;
                            border-top: 2px solid #d5dadd;
                            overflow: hidden;
                            z-index: 1;
                        }
                        .form-horizontal .form-group:last-child:before{
                            content: "";
                            display: block;
                            width: 100%;
                            height: 100%;
                            background: url("../images/img-1.png") repeat;
                            position: absolute;
                            top: 0;
                            left: 0;
                            z-index: -1;
                        }
                        .form-horizontal .form-control{
                            height: 50px;
                            background: #dbe0e4;
                            border: 2px solid #b3bcc1;
                            border-radius: 8px;
                            box-shadow: inset 0 7px 9px -7px rgba(0,0,0,0.4);
                            padding: 0 50px;
                            font-size: 16px;
                            font-weight: bold;
                            color: #687176;
                            position: relative;
                            transition: all 0.3s ease 0s;
                        }
                        .form-horizontal .form-control:focus{
                            box-shadow: none;
                            outline: 0 none;
                        }
                        .form-horizontal .form-control::-webkit-input-placeholder{ color: #687178 !important; }
                        .form-horizontal .form-control:-moz-placeholder{ color: #687178 !important; }
                        .form-horizontal .form-control::-moz-placeholder{ color: #687178 !important; }
                        .form-horizontal .form-control:-ms-input-placeholder{ color: #687178 !important; }
                        .form-horizontal .btn,
                        .form-horizontal .btn:focus{
                            width: 100%;
                            height: 50px;
                            line-height: 50px;
                            padding: 0 30px;
                            background: #d4ec64;
                            background: linear-gradient(to top, #b8db4d, #d4ec64);
                            border: 2px solid #98bf30;
                            border-radius: 8px;
                            font-size: 18px;
                            font-weight: bold;
                            color: #728335;
                            letter-spacing: 1px;
                            text-transform: uppercase;
                            position: relative;
                        }
                        .form-horizontal .btn:hover{
                            background: #d4ec64;
                            background: linear-gradient(to top, #b8db4d, #d4ec64);
                        }
                        .form-horizontal .forgot-pass,
                        .form-horizontal .signup{
                            display: inline-block;
                            padding: 8px 15px;
                            background: #eff3f6;
                            border-radius: 8px;
                            border: 2px solid #b3bcc1;
                            font-size: 17px;
                            font-weight: bold;
                            color: #677077;
                        }
                        .form-horizontal .signup{
                            float: right;
                            background: linear-gradient(to top, #da964d, #e5b457);
                            border-color: #bd8f31;
                            color: #fff;
                        }
                        @media only screen and (max-width: 480px){
                            .form-horizontal{ padding: 20px 20px 0; }
                            .form-horizontal .form-group:last-child{
                                padding: 30px 40px;
                                margin: 30px -20px 0 -20px;
                            }
                            .form-horizontal .forgot-pass,
                            .form-horizontal .signup{
                                display: block;
                                float: none;
                                font-size: 14px;
                                text-align: center;
                            }
                            .form-horizontal .forgot-pass{ margin-bottom: 10px; }
                        }
                    
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