/* Reset mínimo y letterbox. El juego se pinta en un canvas de 480×270 escalado
   a múltiplos enteros; el CSS no interpola ni aplica filtros al juego [03 §2.1]. */

*, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: #05070d;
  color: #c9c9c4;
  font-family: ui-monospace, "SFMono-Regular", "DejaVu Sans Mono", Menlo, monospace;
  overscroll-behavior: none;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  overflow: hidden;
}

#marco {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
}

canvas#juego {
  display: block;
  background: #05070d;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  /* El tamaño lo fija el presentador con un múltiplo entero; nunca fraccional. */
}

#error {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  background: #05070d;
  color: #e0b356;
  padding: 2rem;
  text-align: center;
}

#error[hidden] {
  display: none;
}

#error h1 {
  font-size: 1.1rem;
  letter-spacing: 0.24em;
  font-weight: 500;
  margin: 0;
}

#error p {
  margin: 0;
  color: #c9c9c4;
}

#error pre {
  max-width: 46rem;
  max-height: 40vh;
  overflow: auto;
  font-size: 0.75rem;
  color: #7a7f88;
  white-space: pre-wrap;
  text-align: left;
}

#error button {
  font: inherit;
  background: transparent;
  color: #fff0c0;
  border: 1px solid #4a3320;
  padding: 0.4rem 1.1rem;
  cursor: pointer;
}

#error button:hover,
#error button:focus-visible {
  border-color: #e0b356;
}

.aviso {
  position: fixed;
  bottom: 1rem;
  left: 0;
  right: 0;
  text-align: center;
  color: #7a7f88;
}