* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: #1a1a1a;
  color: #e8e8e8;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
  display: flex;
  flex-direction: column;
  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
}

header {
  flex: 0 0 auto;
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
  padding: 8px 12px;
  display: flex;
  justify-content: flex-end;
  border-bottom: 1px solid #2a2a2a;
}

#save-btn {
  background: #2a2a2a;
  color: #e8e8e8;
  border: none;
  border-radius: 6px;
  padding: 6px 14px;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
}

#save-btn:active {
  transform: scale(0.97);
}

main {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
  overflow: hidden;
}

#editor {
  width: 100%;
  max-width: 600px;
  height: 100%;
  padding: 16px 18px;
  background: #1a1a1a;
  color: #e8e8e8;
  border: none;
  outline: none;
  resize: none;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 16px;
  line-height: 1.6;
  -webkit-appearance: none;
}