.game-404 {
  --game-404-bg-primary: var(--bs-body-bg);
  --game-404-text-primary: var(--bs-body-color);
  --game-404-text-muted: var(--bs-secondary);
  --game-404-accent: var(--bs-primary);
  --game-404-border-color: var(--bs-border-color);
  --game-404-canvas-bg: var(--bs-light);
  --game-404-runner-color: var(--bs-dark);
  --game-404-obstacle-color: var(--bs-danger);
  --game-404-ground-color: var(--bs-secondary);
  --game-404-ground-line-color: var(--bs-dark);
  --game-404-kbd-bg: var(--bs-light);
  --game-404-kbd-border: var(--bs-border-color);
  --game-404-font-display: "Press Start 2P", monospace;
  --game-404-font-body: "Inter", sans-serif;
  font-family: var(--game-404-font-body);
  background-color: var(--game-404-bg-primary);
  color: var(--game-404-text-primary);
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 2rem 1rem;
}

.game-404 .content-wrapper {
  max-width: 850px;
  margin: 0 auto;
  width: 100%;
}

.game-404 .error-header {
  margin-bottom: 3rem;
}

.game-404 .error-code {
  font-family: var(--game-404-font-display);
  font-size: 5rem;
  color: var(--game-404-accent);
  margin-bottom: 1rem;
  line-height: 1;
}

@media (min-width: 768px) {
  .game-404 .error-code {
    font-size: 7rem;
  }
}

.game-404 .error-title {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

@media (min-width: 768px) {
  .game-404 .error-title {
    font-size: 2rem;
  }
}

.game-404 .error-message {
  font-size: 1.1rem;
  color: var(--game-404-text-muted);
  margin-bottom: 0;
}

.game-404 .game-container {
  background-color: var(--game-404-canvas-bg);
  border: 2px solid var(--game-404-border-color);
  border-radius: 0.5rem;
  padding: 1.5rem;
  margin-bottom: 2rem;
}

@media (min-width: 768px) {
  .game-404 .game-container {
    padding: 2rem;
  }
}

.game-404 .game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  font-family: var(--game-404-font-display);
  font-size: 0.75rem;
}

@media (min-width: 768px) {
  .game-404 .game-header {
    font-size: 0.9rem;
  }
}

.game-404 .score-display, .game-404 .high-score-display {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.game-404 .score-label {
  color: var(--game-404-text-muted);
  font-size: 0.65rem;
}

@media (min-width: 768px) {
  .game-404 .score-label {
    font-size: 0.75rem;
  }
}

.game-404 #game-canvas {
  display: block;
  width: 100%;
  height: auto;
  border: 2px solid var(--game-404-border-color);
  border-radius: 0.25rem;
  background-color: var(--game-404-bg-primary);
  margin-bottom: 1rem;
  cursor: pointer;
}

.game-404 .game-controls {
  position: relative;
  min-height: 60px;
}

.game-404 .control-hint, .game-404 .game-over-message {
  font-size: 0.9rem;
  color: var(--game-404-text-muted);
  margin: 0;
}

.game-404 .game-over-message {
  display: none;
  font-family: var(--game-404-font-display);
  font-size: 1.25rem;
  color: var(--game-404-accent);
  line-height: 1.6;
}

.game-404 .game-over-message small {
  font-size: 0.6rem;
  color: var(--game-404-text-muted);
  font-family: var(--game-404-font-body);
}

.game-404 kbd {
  background-color: var(--game-404-kbd-bg);
  border: 1px solid var(--game-404-kbd-border);
  border-radius: 0.25rem;
  padding: 0.15rem 0.4rem;
  font-family: var(--game-404-font-display);
  font-size: 0.75rem;
  color: var(--game-404-runner-color);
  box-shadow: 0 1px 2px rgba(var(--bs-dark-rgb), 0.1);
}

.game-404 .action-buttons {
  margin-top: 2rem;
}

.game-404 .btn-home {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
}