body {
  background: radial-gradient(circle, #2b0000, #000000);
  color: #ff4d6d;
  font-family: 'Orbitron', sans-serif;
  text-align: center;
}

h1 {
  font-family: 'Uncial Antiqua', cursive;
  font-size: 60px;
  color: #ff4d6d;
  text-shadow: 
    0 0 8px #ff0033,
    0 0 15px #ff0033;
}

h1 {
  animation: boomGlow 3s infinite alternate ease-in-out;
}

@keyframes boomGlow {
  from { 
    text-shadow: 0 0 4px #ff0033;
  }
  to { 
    text-shadow: 0 0 10px #ff0033;
  }
}


.container {
  border: 2px solid #ff0033;
  box-shadow: 0 0 20px #ff0033;
  padding: 20px;
  margin: 20px auto;
  width: 420px;
}

.secret {
  display: flex;
  justify-content: space-around;
  margin-bottom: 20px;
}

.secret div {
  border: 2px solid #ff0033;
  width: 60px;
  height: 60px;
  line-height: 60px;
  font-size: 24px;
  box-shadow: 0 0 10px #ff0033;
}

.correct {
  animation: glow 1s infinite alternate;
}

@keyframes glow {
  from { box-shadow: 0 0 10px #ff0033; }
  to { box-shadow: 0 0 30px #ff0033; }
}

button {
  background-color: #330000;
  color: #ff4d6d;
  border: 1px solid #ff0033;
  padding: 15px;
  margin: 5px;
  font-size: 18px;
  cursor: pointer;
  box-shadow: 0 0 10px #ff0033;
}

button:hover {
  background-color: #ff0033;
  color: black;
}

button:disabled {
  background-color: #111;
  color: #555;
  box-shadow: none;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.controls {
  margin-top: 10px;
}

/* MENSAJES */
#mensaje {
  margin-top: 10px;
  min-height: 20px;
}

.msg-info { color: #ff4d6d; }
.msg-ok { color: #00ffcc; }
.msg-error { color: #ff0033; }
.msg-stop { color: white; }

/* EFECTOS */
.magic {
  animation: magicPulse 0.4s ease;
}

@keyframes magicPulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.2); box-shadow: 0 0 30px #ff0033; }
  100% { transform: scale(1); }
}

.explosion {
  animation: explode 0.6s ease;
}

@keyframes explode {
  0% { transform: scale(1); }
  50% { transform: scale(1.5) rotate(10deg); }
  100% { transform: scale(1); }
}

.used {
  opacity: 0.4;
  transform: scale(0.9);
}

.stop-activo {
  background-color: white !important;
  color: black !important;
}

/* ===== RESPONSIVE MÓVIL ===== */
@media (max-width: 500px) {

  .container {
    width: 95%;
    padding: 15px;
  }

  h1 {
    font-size: 40px;
  }

  .secret div {
    width: 50px;
    height: 50px;
    line-height: 50px;
    font-size: 20px;
  }

  button {
    padding: 12px;
    font-size: 16px;
  }

  .grid {
    grid-template-columns: repeat(3, 1fr);
  }

  #mensaje {
    font-size: 13px;
  }
}