body{
    margin: 0;
    padding: 0;
    background: linear-gradient(120deg,#9ec504, #10740d);
    height: 100vh;
    overflow: hidden;
}

.logo {
    position: absolute;
    top: -85px;
    left: 55px;
}

.login_box * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Poppins", sans-serif;
}

.login_box{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    background: white;
    border-radius: 10px;
    box-shadow: 10px 10px 15px rgba(0,0,0,0.05);
}
.login_box h1{
    text-align: center;
    padding: 20px 0;
    border-bottom: 1px solid silver;
}
.login_box form{
    padding: 0 40px;
    box-sizing: border-box;
}
form .txt_field{
    position: relative;
    border-bottom: 2px solid #adadad;
    margin: 30px 0;
}
.txt_field input{
    width: 100%;
    padding: 0 5px;
    height: 40px;
    font-size: 16px;
    border: none;
    background: none;
    outline: none;
}
.txt_field label{
    position: absolute;
    top: 50%;
    left: 5px;
    color: #adadad;
    transform: translateY(-50%);
    font-size: 16px;
    pointer-events: none;
    transition: .5s;
}
.txt_field span::before{
    content: '';
    position: absolute;
    top: 40px;
    left: 0;
    width: 0%;
    height: 2px;
    background: #9ec504;
    transition: .5s;
}
.txt_field input:focus ~ label,
.txt_field input:valid ~ label{
    top: -5px;
    color: #9ec504;
}
.txt_field input:focus ~ span::before,
.txt_field input:valid ~ span::before{
    width: 100%;
}
.pass{
    margin: -5px 0 20px 5px;
    color: #a6a6a6;
    cursor: pointer;
}
.pass:hover{
    text-decoration: underline;
}
input[type="submit"]{
    width: 100%;
    height: 50px;
    border: 1px solid;
    background: #9ec504;
    border-radius: 25px;
    font-size: 18px;
    color: #FFF;
    font-weight: 700;
    cursor: pointer;
    outline: none;
}
input[type="submit"]:hover{
    border-color: #9ec504;
    transition: .5s;
}
.under_submit{
    margin: 30px 0;
    text-align: center;
    font-size: 16px;
    color: #666666;
}
.under_submit a{
    color: #9ec504;
    text-decoration: none;
}
.under_submit a:hover{
    text-decoration: underline;
}