body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: #f6f7f9;
  color: #1c1e21;
}

main {
  max-width: 820px;
  margin: 40px auto;
  padding: 0 20px;
}

video {
  width: 100%;
  border-radius: 8px;
  background: #000;
}

.controls {
  display: flex;
  gap: 8px;
  margin: 12px 0;
}

button {
  padding: 8px 14px;
  border: 1px solid #c9ccd1;
  border-radius: 6px;
  background: #fff;
  cursor: pointer;
}

#checks {
  list-style: none;
  padding: 0;
}

.ok { color: #1a7f37; }
.fail { color: #cf222e; }