#banner-wrapper {
  width: 960px;
  margin: 0 auto;
  position: relative;
  overflow: visible;
}

/* Banner */
#drop-banner {
  width: 960px;
  height: 100px;

  background: #ffffff;
  border: 5px solid #81c100;
  border-radius: 8px;

  position: absolute;
  top: -110px; /* hidden above */
  left: 0;

  display: flex;
  align-items: center;
  justify-content: center;

  transition: top 0.35s cubic-bezier(.25,.75,.35,1.2);
  z-index: 10;
}

#drop-banner.open {
  top: 0;
}

/* Button stays still */
#banner-toggle {
  position: absolute;
  right: 0;
  top: 0;

  width: 120px;
  height: 40px;

  background: #ffffff;
  border: 5px solid #81c100;
  border-radius: 8px;

  font-family: inherit;
  font-weight: bold;
  cursor: pointer;

  z-index: 20;
}