:root {
  --bg: #1b1712;
  --panel: #2a241c;
  --text: #f3ead8;
  --muted: #c9bda4;
  --accent: #e0a040;
  --border: #4a3f30;
}
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.4 system-ui, -apple-system, "Segoe UI", sans-serif;
  display: flex;
  flex-direction: column;
}
header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  padding: 8px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
h1 { font-size: 20px; margin: 0; letter-spacing: 0.02em; }
#mode { color: var(--muted); }
.spacer { flex: 1; }
button, label.button {
  font: inherit;
  color: var(--bg);
  background: var(--accent);
  border: 0;
  border-radius: 6px;
  padding: 6px 14px;
  cursor: pointer;
}
button.quiet { background: transparent; color: var(--text); border: 1px solid var(--border); }
button:focus-visible, label.button:focus-within { outline: 3px solid var(--text); outline-offset: 2px; }
#rom { position: absolute; width: 1px; height: 1px; opacity: 0; }
main { flex: 1; min-height: 0; display: flex; }
iframe { flex: 1; border: 0; background: #000; }
footer {
  padding: 6px 16px;
  font-size: 14px;
  color: var(--muted);
  background: var(--panel);
  border-top: 1px solid var(--border);
}
#message[data-kind="error"] { color: #ff9a8a; }
#message[data-kind="ok"] { color: #a8e0a0; }
#message[data-kind="warn"] { color: #f0d080; }
[hidden] { display: none !important; }
footer details { margin-top: 4px; }
footer summary { cursor: pointer; color: var(--text); width: fit-content; }
footer summary:focus-visible { outline: 3px solid var(--text); outline-offset: 2px; }
#about { max-width: 70ch; margin: 6px 0 2px; }
#about p { margin: 0 0 6px; }
#howto {
  display: flex;
  flex-wrap: wrap;
  gap: 2px 24px;
  padding: 6px 16px;
  font-size: 15px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
#howto p { margin: 0; }
#howto b { color: var(--accent); font-weight: 600; }