html,
body {
  width: 100%;
  height: 100%;
}

.container-fluid {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.fluid {
  flex: 1;
}

.panel-border {
  border-radius: 5px;
  border: 2px solid #cccccc;
  margin: 5px;
  padding: 5px;
}

.btn {
  background-image: linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.5),
    rgba(0, 0, 0, 0.05)
  );
  background-repeat: repeat-x;
}