body {
  background: #22223b;
  font-family: Arial, sans-serif;
  color: #f2e9e4;
  text-align: center;
}
h1 {
  margin-top: 32px;
  color: #9599b2;
}
#pong {
  background: #232946;
  display: block;
  margin: 28px auto 12px auto;
  border-radius: 10px;
  box-shadow: 0 2px 12px #bbb;
}
#score {
  font-size: 1.2em;
  margin-bottom: 10px;
  color: #f6c90e;
}
#restart-btn {
  background: #4a4e69;
  color: #fff;
  font-size: 1em;
  border: none;
  border-radius: 8px;
  padding: 7px 25px;
  cursor: pointer;
  transition: background 0.2s;
  margin-bottom: 20px;
}
#restart-btn:hover {
  background: #232946;
}
/* Controles y accesibilidad */
#controls {
  margin: 0.8rem auto 0.4rem auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}
#controls select#difficulty {
  font-size: 1em;
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid #ddd;
  background: #232946;
  color: #f2e9e4;
}
#pause-btn {
  font-size: 1em;
  padding: 6px 16px;
  border: none;
  border-radius: 8px;
  background: #4a4e69;
  color: #fff;
  cursor: pointer;
  transition: background 0.2s;
}
#pause-btn:hover {
  background: #232946;
}

/* Foco accesible */
#pause-btn:focus-visible,
#restart-btn:focus-visible,
#controls select#difficulty:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px rgba(246, 201, 14, 0.35);
}

/* Estado deshabilitado para botones */
#pause-btn:disabled,
#restart-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Ajuste del marcador */
#score {
  font-weight: 600;
}