html,
body {
  height: 100%;
}

body {
  display: flex;
  align-items: center;
  background-color: #f5f5f5;

  padding:0; 
  background:#ebebeb url('./../image/background/bg-login.jpg') no-repeat center center / cover;
}

.side-form{
  background-color: rgba(0, 0, 0, 0.3);
  width:30%;
}
.side-form-home{
  height: 150px;
  margin: 10px;
  margin-bottom: 50px;
  border-style: solid;
  border-color: white;
  border-width: 2px;
  border-bottom-right-radius: 50px;
  border-top-left-radius: 50px;

  background-color: rgba(0, 0, 0, 0.3);
  width:30%;
}

.alert{
  position:absolute; 
  top:10px; 
  width:29%;
  right:10px;
}

.form-signin {
  width: 100%;
  max-width: 330px;
  padding: 15px;
  margin: auto;
}
.form-signin .checkbox {
  font-weight: 400;
}
.form-signin .form-control {
  position: relative;
  box-sizing: border-box;
  height: auto;
  padding: 10px;
  font-size: 16px;
}
.form-signin .form-control:focus {
  z-index: 2;
}
.form-signin input[type="email"] {
  margin-bottom: -1px;
  border-bottom-right-radius: 0;
  border-bottom-left-radius: 0;
}
.form-signin input[type="password"] {
  margin-bottom: 10px;
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}

@media screen and (max-width: 1200px) {
  .side-form {
    width: 50%; /* The width is 100%, when the viewport is 800px or smaller */
  }
  .alert{
    width:48%;
  }
}
@media screen and (max-width: 600px) {
  .side-form {
    width: 100%; /* The width is 100%, when the viewport is 800px or smaller */
  }
  .alert{
    width:97%;
  }
  body {
    background:#ebebeb url('./../image/background/bg-login_center.jpg') no-repeat center center / cover;
  }
}

/* unvisited link */
.btn-register:link {
  text-decoration:none;
  color: #ffffff;
}
/* visited link */
.btn-register:visited {
  text-decoration:none;
  color: #ffffff;
}
/* mouse over link */
.btn-register:hover {
  text-decoration:none;
  color: #0a2f35;
}
/* selected link */
.btn-register:active {
  text-decoration:none;
}

/* unvisited link */
.btn-login:link {
  text-decoration:none;
  color: #0a2f35;
}
/* visited link */
.btn-login:visited {
  text-decoration:none;
  color: #0a2f35;
}
/* mouse over link */
.btn-login:hover {
  text-decoration:none;
  color: #ffffff;
}
/* selected link */
.btn-login:active {
  text-decoration:none;
}

.container_back{    
  position:fixed;

  bottom:10px;
  left:20px; 
  height:40px;
  width:40px;
  border-radius: 25px;
  background-color: rgba(0, 0, 0, 0.3);
}