html
{
  height:100%;

  min-height: 100%; /* for firefox */
  padding: 0;
  margin: 0;
}
body {

  margin: 0;
  padding: 0;
  background-color: rgb(27,27,27);
  height:100%;
  min-height: 100%; /* for firefox */

  /* font-family: sans-serif; */
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
}

#top_line
{
  width: 100%;
  height:2px;
  background-color: #ffc400;
  /* background-color: #d83933; */
  /* background-color: rgb(0, 255, 242); */
  /* animation-name: colors_anim; */
  animation-duration: 10s;
  animation-iteration-count: infinite;
}

@keyframes colors_anim {
  0%   {background-color: rgb(255, 196, 0);}
  25%  {background-color: rgb(0, 255, 170);}
  50%  {background-color: rgb(255, 0, 200);}
  75%  {background-color:rgb(255, 0, 0);}
  100% {background-color:rgb(255, 196, 0);}
}

#bottom_stripe
{
  width:100%;
  background-color: rgb(27, 27, 27);
  height:25px;
  color:white;
  box-sizing: border-box;
}

img, svg {
  position: absolute;
  /* margin: auto; */
  
}


/* Container containing top-line, navbar, Cassette+Form - Auto and border stripe */
#content
{
  display: grid;
  grid-template-rows: 2px 48px auto;
  height: 100%;
}
/* Containg cassette | form in columns */

#middle_content
{
  display: grid;
  align-items: stretch;
  grid-template-columns: 1fr auto;
  height: 100%;
  overflow: hidden;
}
.alert {
  padding: 20px;
  margin-bottom: 20px;
  background-color: rgb(70, 167, 245);
  color: white;
}

.closebtn {
  margin-left: 15px;
  color: white;
  font-weight: bold;
  float: right;
  font-size: 22px;
  line-height: 20px;
  cursor: pointer;
  transition: 0.3s;
}

.closebtn:hover {
  color: black;
}

/* Containers with cassette and Background */
#outside_container {
  position: relative;
  width: 100%;
  box-sizing: border-box;
  background-color: rgb(231, 231, 231);
  padding-left:20px;
  padding-right:20px;
}

#cassette_container {
  position: relative;
  overflow: hidden;
  width: 100%;
  margin:0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #e7e7e7;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23d9d9d9' fill-opacity='0.4'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}