html,
body {
  height: 100%;
}

body {
  display: grid;
  place-items: center;
  min-height: 100vh;
  background: linear-gradient(157deg, rgba(0, 31, 56, 1) 0%, rgba(0, 85, 156, 1) 100%);
}

.el {
  background-color:cadetblue;
  transition: 1s;
  width: 100%;
  height: 100%;
  mask:
    radial-gradient(circle at 50% 50%, white 2px, transparent 2.5px) 50% 50% / 20px 20px,
    url("https://cdn.rinax.de/images/noise-mask.webp") 256px 50% / 256px 256px;
  mask-composite: intersect;
  animation: flicker 40s infinite linear;
  position: fixed;
  top: 0px;
  left: 0px;
}

@keyframes flicker {
  to {
    mask-position: 50% 50%, 0 50%;
  }
}

.form-signin {
  width: 100%;
  max-width: 330px;
  padding: 15px;
  margin: auto;
}

.form-signin .checkbox {
  font-weight: 400;
}

.form-signin .form-floating:focus-within {
  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;
}

.bd-placeholder-img {
  font-size: 1.125rem;
  text-anchor: middle;
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
}
    
@media (min-width: 768px) {
  .bd-placeholder-img-lg {
    font-size: 3.5rem;
  }
}