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Thanks to: 

<div class="blurred-box">
  <!--  you dont need the user-login-box html  -->
  <!--  for demo purposes only and its shit  -->
  <div class="user-login-box">
    <span class="user-icon"></span>
    <div class="user-name">Gilfoyle</div>
    <input class="user-password" type="text" />


Thanks to: Usama Tahir

 margin: 0;
 padding: 0;

    width: 100vw;
    height: 100vh;

/* CSS which you need for blurred box */
 background-repeat: no-repeat;
 background-attachment: fixed;
 background-size: cover;
 background-position: top;
 width: 100%;
 height: 100%;
 font-family: Arial, Helvetica;
 letter-spacing: 0.02em;
  font-weight: 400;
 -webkit-font-smoothing: antialiased; 

  position: relative;
  width: 250px;
  height: 350px;
  top: calc(50% - 175px);
  left: calc(50% - 125px);
  background: inherit;
  border-radius: 2px;
  overflow: hidden;

 content: '';
 width: 300px;
 height: 300px;
 background: inherit; 
 position: absolute;
 left: -25px;
 left position
 right: 0;
 top: -25px;  
 top position 
 bottom: 0;
 box-shadow: inset 0 0 0 200px rgba(255,255,255,0.05);
 filter: blur(10px);

/* Form which you dont need */
  position: relative;
  margin-top: 50px;
  text-align: center;
  z-index: 1;
.user-login-box > *{
  display: inline-block;
  width: 200px;

  width: 100px;
  height: 100px;
  position: relative;
  border-radius: 50%;
  background-size: contain;
  background-image: url(;

  margin-top: 15px;
  margin-bottom: 15px;
  color: white;

  width: 120px;
  height: 18px;
  opacity: 0.4;
  border-radius: 2px;
  padding: 5px 15px;
  border: 0;