html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  width: 100%;
  overflow: hidden;
  background: #030014;
  font-family: 'Wallpoet', sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  overscroll-behavior: none;
  -webkit-user-select: none;
  user-select: none;
}
header {
  text-align: center;
  color: #ff00ff;
  margin: 20px 0 10px 0;
  touch-action: auto;
}
header h1 {
  margin: 0;
  font-size: 48px;
}
header a {
  color: #00eaff;
  text-decoration: none;
  font-size: 16px;
}
#container {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  position: relative;
}
#gameCanvas {
  background: rgba(10,10,25,0.6);
  backdrop-filter: blur(6px);
  border: 2px solid #ff00ff;
  box-shadow: 0 0 25px #ff00ff inset, 0 0 25px #00eaff;
  border-radius: 10px;
  display: block;
  touch-action: none;
}
#scorePopup {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
  background: rgba(10,10,25,0.95);
  padding: 30px 40px;
  border: 3px solid #ff00ff;
  border-radius: 15px;
  text-align: center;
  display: none;
  box-shadow: 0 0 40px #ff00ff, 0 0 60px #00eaff;
  z-index: 1000;
}
#scoreText {
  color: #fff;
  font-size: 20px;
  margin-bottom: 20px;
  text-shadow: 0 0 10px #ff00ff;
}
#scorePopup button {
  margin-top: 10px;
  padding: 12px 30px;
  border: none;
  background: linear-gradient(135deg, #ff00ff, #00eaff);
  color: #fff;
  border-radius: 10px;
  font-size: 18px;
  font-family: 'Wallpoet', sans-serif;
  cursor: pointer;
  box-shadow: 0 0 20px #ff00ff;
  touch-action: auto;
  -webkit-tap-highlight-color: rgba(255, 0, 255, 0.3);
  transition: transform 0.2s, box-shadow 0.2s;
}
#scorePopup button:hover {
  transform: scale(1.1);
  box-shadow: 0 0 30px #00eaff;
}
#scorePopup button:active {
  transform: scale(0.95);
}
@media (max-width: 768px) {
  header h1 {
      font-size: 36px;
  }
  header a {
      font-size: 14px;
  }
  #scoreText {
      font-size: 18px;
  }
  #scorePopup button {
      font-size: 16px;
      padding: 10px 25px;
  }
}