:root {
  --bg-dark: #0d1111;
  --bg-mid: #1a2222;
  --line: #2f3a3a;
  --text: #cfd6d6;
  --muted: #7f8f8f;
}

body {
  margin: 0;
  background: radial-gradient(circle at top, #2b3333, var(--bg-dark));
  color: var(--text);
  font-family: monospace;
  text-align: center;
}

.screen {
  display: none;
  min-height: 100vh;
  padding-top: 22vh;
}

#screen-flash {
  background: #e6f0f0;
  padding-top: 12vh;
}

#screen-flash img {
  max-width: 65%;
  animation: drift 6s ease-in-out infinite alternate;
}

@keyframes drift {
  from { transform: translateY(0); }
  to { transform: translateY(12px); }
}

.hint {
  opacity: 0.5;
  font-size: 14px;
}

input, button {
  background: var(--bg-dark);
  color: var(--text);
  border: 1px solid var(--line);
  font-size: 16px;
  padding: 8px 12px;
}

#error {
  color: #b06a6a;
}

#playBtn {
  font-size: 22px;
  padding: 14px 36px;
  border: 1px solid var(--muted);
  background: transparent;
}

.game-text {
  font-size: 13px;
  letter-spacing: 2px;
  opacity: 0.6;
  margin-top: -10vh;
}

#gameCanvas {
  background: linear-gradient(var(--bg-mid), var(--bg-dark));
  border: 1px solid var(--line);
}

#controls {
  margin-top: 10px;
}

#controls button {
  width: 56px;
  height: 56px;
  margin: 4px;
  background: var(--bg-dark);
  color: var(--muted);
  border: 1px solid var(--line);
  font-size: 20px;
  touch-action: none;
}