.help-block {
  color:red;
  font-size:12px;
  font-weight:bold;
}
html, body {
height: 100vh;
margin: 0;
overflow-x: hidden;  /* allow horizontal scroll */
overflow-y: auto;    /* block vertical scroll */
background:#153056;
}
.error-msg-box {
position: absolute;   /* or fixed */
top: 7%;
margin-left: 40%;
transform: translateX(-50%);
width: 100%;
max-width: 500px;
}

.error-icon {
width: 24px;
height: 24px;
}

.error-text {
color: #ff0000;
font-weight: 500;
font-size: 16px;
}
.auth-form {
position: relative;
}

.auth-form .banner-img {
position: absolute; /* or fixed, depending on your layout */
top: 0;
left: 0;
right: 0;
bottom: 0;
}