#main-container {
  margin: 20px auto;
  max-width: 440px;
  /* ✅ fixed max width */
  background: linear-gradient(135deg, #1e1e1e, #2b2b2b, #444);
  padding: 20px;
  border-radius: 16px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
  text-align: center;
}

.wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.top-stats {
  display: flex;
  gap: 29px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 20px;
}

.stat-btn {
  padding: 10px 20px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 15px;
  color: #fff;
  background: linear-gradient(135deg, #0066ff, #0044aa);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.stat-btn:nth-child(2) {
  background: linear-gradient(135deg, #f8d7da, #f5c6cb);
  color: #1e1e1e;
}


.board {
  background: #111;
  border: 4px solid #3a3a3a;
  border-radius: 8px;
  overflow: hidden;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  image-rendering: pixelated;
  background: #111;
  border-radius: 0 !important;
}

/* Fullscreen popup styling */
.fullscreen-popup {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 99999999;
}

.fullscreen-popup.hidden {
  display: none;
}

.fullscreen-popup-content {
  background: #fff;
  padding: 30px 0;
  width: 450px;
  border-radius: 16px;
  text-align: center;
  color: #000;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
}

.fullscreen-popup-content h2 {
  margin: 0 auto 15px;
  font-size: 45px;
}

.fullscreen-popup-content p {
  margin: 8px 0;
  font-size: 18px;
  font-weight: 700;
}

#newBtn:focus-visible{
  outline: none !important;
}

/* ================== Responsive ================== */
@media (max-width: 1299px) {
  .flip-button {
    padding: 10px 30px;
    font-size: 1.1rem;
  }
}

@media (max-width: 600px) {
  #main-container {
    max-width: 380px;
  }

  .stat-btn {
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  #main-container {
    max-width: 380px;
  }
}

@media (max-width: 350px) {
  #main-container {
    max-width: 380px;
  }

  .top-stats {
    flex-direction: row;
    gap: 10px;
  }
}

@media (max-width: 320px) {
  #main-container {
    max-width: 380px;
  }

  .top-stats {
    flex-direction: row;
    gap: 5px;
  }

  .stat-btn {
    padding: 10px 15px;
    font-size: 0.8rem !important;
  }
}