body  {
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: 100% 100%;
  }

.flash {
    max-width: 600px;
    margin: auto;
    padding: 10px;
    margin: 10px;
    font-size: 20px;
    font-weight: bold;
}

.success {
    color: green
}

.primary {
    color: blue
}

.info {
    color: black
}

.danger {
    color: red;
}

.fullscreen {
    position: relative;
    left: 50%;
    right: 50%;
    margin-left: -50vw;
    margin-right: -50vw;
    max-width: 100vw;
    width: 100vw;
}