index.css

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica,
    Arial, sans-serif;
  padding: 0;
  margin: 0;
  overflow: hidden;
}

:root {
  /* account for the arrow */
  --actual-height: calc(100vh - 12px);
}

.myarrow {
  position: relative;
  /* padding-top: 12px; */
  padding: 12px 0 0 0 ;
}

.myarrow:before {
  content: '';
  height: 0;
  width: 0;
  border-width: 0 8px 12px 8px;
  border-style: solid;
  border-color: transparent transparent white transparent;
  position: absolute;

  top: 0;
  left: 50%;
  transform: translateX(-50%);
}

@media (prefers-color-scheme: dark) {
  .myarrow:before {
    border-color: transparent transparent #343541 transparent !important;
  }
}

.page {
  background: #eeeeee;
  width: 100%;
  height: 100vh;
  margin-top: 12px;
  margin: 0 auto;
  position: relative;
}

.darwin.page {
  border-radius: 8px;
  overflow: hidden;
}

webview {
  /* overflow: hidden; */
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height:  calc(100vh - 12px);
  display: inline-flex !important;
}