*{
    margin:0;
    padding:0;
}
.back_img{
    width: 100%;
    height: 100%;
    position: absolute;
    background-image: url("../img/background.jpg");
    background-size: 100%;
    opacity: 0.87;
}
.block{
    width: 28%;
    height: 20rem;
    position: absolute;
    box-shadow: 0px 0px 5px 4px rgba(0, 0, 0, 0.4);
    left:35%;
    top:24%;
    background-color: white;
}
.block_top{
    height: 64px;
    background-color:white;
    border-bottom: 1px solid #dddddd;
}
.block_top_left{
    width: 50%;
    float: left;
}
.login{
    text-align: center;
    line-height: 64px;
    margin-left: 16%;
    color: black;
    cursor: pointer;
}
.login:hover{
    color: black;
}
.block_top_right{
    width: 50%;
    float: right;
}
.register{
    text-align: center;
    line-height: 64px;
    margin-left: -16%;
    color: gray;
    cursor: pointer;
}
.register:hover{
    color: black;
}
.login_form_content{
     width: 80%;
     margin:3% auto;
 }
.login_form_input{
    width: 60%;
    height: 34px;
    margin-top: 10%;
    border:1px solid #cdcdcd;
    border-radius: 3px;
    font-size: 16px;
    padding-left: 5%;
}
.login_form_txt{
    width: 25%;
    text-align: right;
    display: inline-block;
    margin-right: 4%;
    color: #383838;
    outline: none;
    font-size: 15px;
}
.login_form_button{
    display: block;
    margin-left: 30%;
    width:40%;
    border: 1px solid #2795dc;
    background-color: #2795dc;
    color:white;
    height: 38px;
    margin-top: 11%;
    border-radius: 3px;
    font-size: 16px;
    border-bottom: 3px solid #0078b3;
}
.login_form_button:hover{
    cursor: pointer;
    background-color: #288bd3!important;
}
.register_form{
    display: none;
}
.register_form_content{
    width: 80%;
    margin:3% auto;
}
.register_form_input{
    width: 60%;
    height: 34px;
    margin-top: 7%;
    border:1px solid #cdcdcd;
    border-radius: 3px;
    font-size: 16px;
    padding-left: 5%;
}
.register_form_txt{
    width: 25%;
    text-align: right;
    display: inline-block;
    margin-right: 4%;
    color: #383838;
    outline: none;
    font-size: 15px;
}
.password_block{
    width: 40%;
    height: 35px;
    border: 1px solid gray;
    margin-left: 30%;
    margin-top: 6%;
    margin-bottom: 2%;
    background-image: url("../img/1.png");
    background-size: 50% 24px;
    cursor: pointer;
}
.register_form_button{
    display: block;
    margin-left: 30%;
    width:46%;
    border: 1px solid #2795dc;
    background-color: #2795dc;
    border-bottom: 3px solid #0078b3;
    color:white;
    height: 38px;
    margin-top: 8%;
    border-radius: 3px;
    font-size: 16px;
}
.txt{
    display:inline-block;
    padding: 0px 2px;
    font-weight: bold;
    margin-top: -5%;
    margin-left: 5%;
}
.underline{
    width: 25%;
    height: 2px;
    background-color: gray;
    margin-left: 4rem;
    transition: all 0.2s linear;
}