body {
  background-color: #add8e6;
  background-image: linear-gradient(147deg, #add8e6 0%, #fffafa 74%);
  background-size: cover;
  background-attachment: fixed;
  font-family: "Amazon Ember",Arial,sans-serif;
}

.container .panel {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translateX(-50%) translateY(-50%);
}

/* CSS */
.button-sleek {
  background-image: linear-gradient(#f7f8fa ,#e7e9ec);
  border-color: #adb1b8 #a2a6ac #8d9096;
  border-style: solid;
  border-width: 1px;
  border-radius: 10px;
  box-shadow: rgba(255,255,255,.6) 0 1px 0 inset;
  box-sizing: border-box;
  color: #0f1111;
  cursor: pointer;
  display: inline-block;
  font-family: "Amazon Ember",Arial,sans-serif;
  font-size: 14px;
  height: 29px;
  outline: 0;
  overflow: hidden;
  padding: 0 11px;
  text-align: center;
  text-decoration: none;
  text-overflow: ellipsis;
  user-select: none;
  white-space: nowrap;
}

.button-sleek:active {
  border-bottom-color: #a2a6ac;
}

.button-sleek:active:hover {
  border-bottom-color: #a2a6ac;
}

.button-sleek:hover {
  border-color: #a2a6ac #979aa1 #82858a;
}