/* Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Poppins", sans-serif;
}

body {
  background: linear-gradient(135deg, #2c5364, #203a43, #0f2027);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: white;
}

/* Container */
.container {
  height: auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

/* Game Board */
.game {
  height: 60vmin;
  width: 60vmin;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5vmin;
  margin-bottom: 2rem;
  perspective: 1000px;
}

/* Each Box */
.box {
  height: 18vmin;
  width: 18vmin;
  border-radius: 1rem;
  border: none;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  font-size: 8vmin;
  font-weight: bold;
  color: #ffdd59;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
}

.box:hover {
  transform: scale(1.05) rotate3d(1, 1, 0, 10deg);
  background: rgba(255, 255, 255, 0.2);
}

/* Buttons */
button {
  padding: 0.8rem 1.5rem;
  font-size: 1.2rem;
  border-radius: 0.8rem;
  border: none;
  cursor: pointer;
  margin: 0.5rem;
  transition: all 0.3s ease;
  font-weight: 600;
}

#reset-btn,
#newGame-btn {
  background: linear-gradient(135deg, #ff512f, #dd2476);
  color: white;
  box-shadow: 0 5px 10px rgba(0, 0, 0, 0.3);
}

#reset-btn:hover,
#newGame-btn:hover {
  transform: scale(1.1);
  background: linear-gradient(135deg, #dd2476, #ff512f);
}

/* Message Container */
.messageContainer {
  height: auto; /* flexible height */
  min-height: 8vmin; /* keeps space reserved so board won't shift */
  display: flex;
  flex-direction: column; /* stack message & button */
  justify-content: center;
  align-items: center;
  margin-bottom: 1.5rem;
  gap: 0.5rem; /* space between message and button */
}

#message {
  font-size: 5vmin;
  font-weight: bold;
  color: #ffd32a;
  text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.6);
  animation: pulse 1.5s infinite;
  text-align: center;
}

/* Reset Button in Center */
#reset-btn {
  display: block;
  margin: 1rem auto; /* center horizontally */
}

/* Extra Styling */
.upper {
  margin-bottom: 1rem;
}

.hide {
  display: none;
}

/* Animation */
@keyframes pulse {
  0% {
    transform: scale(1);
    opacity: 0.8;
  }
  50% {
    transform: scale(1.1);
    opacity: 1;
  }
  100% {
    transform: scale(1);
    opacity: 0.8;
  }
}