html, body {
    height : 100%;
    padding: 0;
    margin: 0 auto;	
 }
div {
    box-sizing: border-box;
}
.main_container {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: stretch;
    max-width: 380px;
    height: 370px;
    position: absolute;
    top: calc(50% - 200px);
    left:0;
    right:0;
    margin: 0 auto;
    background: #ecf0f1; /*#ecf0f1; */
    padding:12px;
    border-radius: 15px;
    border-top: 4px solid #953EE1;
    box-shadow: 5px 5px 15px #333;
}

.header_form {
    height: 6%;
    text-align:center;
}
.header_form h3 {
    font-size: 1.5em;
    margin-top: 5px;
    color: blue;
}

.login_form {
    height: 33%; 
}

.login_form form {
    padding-top: 5px;
    text-align: center;
}

.login_form input[type="text"], 
.login_form input[type="password"],
.login_form button {
    width: 80%;
    margin-bottom: 25px;
    height: 40px;
    border-radius: 5px;
    outline: 0;
    padding: 0 0 0 10px;
    font-size: 14px;
    border: 1px solid #bbb;
    -moz-outline-style: none; 
}
      
.footer_form a {
    text-align: center;
    font-size: 12px;
    color: #3498db;
    left: 30px;
    margin: auto;
}

.button {
   background-color: #B054E1;
   border:none;
   color: white;
   font-size: 18px;
   font-weight: 200;
   cursor: pointer;
   transition: box-shadow 0.4s ease;
    
} 

.button:hover {
   background: #9D1BC4;
   transition: .5s;
}

.footer_form {
  display: flex;
  position: relative;

}

.ErrMain {
    display: block;
    opacity: 0;  
    width: 250px;
    height: 50px;
    position: absolute;
    background-color: red; 
    color: #fff;
    left:55px;
    top:10px;
    border-radius: 15px;
    transition: all 2s; 

} 
.ErrMain p {
   font-size: 22px;
   text-align: center;
   margin: 12px; 
   font-weight: bold;

}