.margin-nav {
  margin-right: auto;
  margin-left: 2rem;
  /* background-color: rgb(20, 183, 220); */
}

.box-shadow {
  box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.5), 0 4px 8px 0 rgba(0, 0, 0, 0.5);
}

.cor {
  background-color: aqua;
}

.flash-message {
  position: relative;
  margin: 10px;
}

@keyframes fadeOut {
  0% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    display: none;
  }
}

.flash-message.fade-out {
  animation: fadeOut 3s forwards;
}