:root {
  color-scheme: dark;
  --bg: #11141a;
  --panel: #1b2029;
  --text: #d8dde6;
  --muted: #8b95a5;
  --accent: #4f8fd8;
  --error: #e06c6c;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
a { color: var(--accent); }
.panel {
  background: var(--panel);
  border-radius: 8px;
  padding: 24px 28px;
  max-width: 680px;
  width: 100%;
}
.panel[hidden] { display: none; }
h1, h2 { margin-top: 0; }
.note { color: #e0b46c; }
button {
  font: inherit;
  font-weight: 600;
  padding: 10px 22px;
  margin: 8px 0 16px;
  border: 0;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}
button:hover { filter: brightness(1.1); }
details { margin-bottom: 16px; }
summary { cursor: pointer; }
footer { color: var(--muted); font-size: 14px; }
progress { width: 100%; height: 14px; accent-color: var(--accent); }
#loader-text { color: var(--muted); }
#error h2 { color: var(--error); }
#error-text { white-space: pre-wrap; word-break: break-word; }
#game {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  display: block;
}
#game[hidden] { display: none; }