.panel-default:not(.error-holder):not(.maintenance) {
  display: none;
}

.error-holder {
  padding: 0;
}

.error-holder .panel-heading {
  display: none;
}

.error-holder .error-content-wrapper {
  display: table;
  width: 100%;
  height: 100%;
}

.error-holder .error-content-wrapper > div {
  display: table-cell;
  vertical-align: middle;
  width: 50%;
}

.error-holder .error-content-wrapper > div.error-text-wrapper {
  text-align: center;
}

.error-holder .error-content-wrapper > div.error-text-wrapper h1 {
  margin-bottom: 50px;
}

.error-holder .error-content-wrapper > div.error-text-wrapper a {
  color: #1E88E5;
}

.maintenance .panel-heading {
  display: none;
}

.maintenance .error-content-wrapper {
  display: table;
  width: 100%;
  height: 100%;
}

.maintenance .error-content-wrapper > div {
  display: table-row;
}

.maintenance .error-content-wrapper > div.error-text-wrapper {
  text-align: center;
}

.maintenance .error-content-wrapper > div.error-text-wrapper h1 {
  margin-bottom: 50px;
}

.maintenance .error-content-wrapper > div.error-text-wrapper a {
  color: #1E88E5;
}