* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
  font-family: Arial, sans-serif;
  background: #111;
  overflow: hidden;
}

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 12px 18px;
  background: rgba(0, 0, 0, 0.75);
  color: white;
  z-index: 10;
  backdrop-filter: blur(6px);
}

.topbar h1 {
  font-size: 18px;
  font-weight: normal;
}

.container {
  width: 100vw;
  height: 100vh;
}

iframe {
  width: 100%;
  height: 100%;
  border: none;
  background: white;
}