html, body {
  margin: 0;
  padding: 0;
  text-align: center;
  font-family: Arial, sans-serif;
  background: #70c5ce;
  touch-action: manipulation;
  user-select: none;
  overflow-x: hidden;
}

/* Canvas */
canvas {
  display: block;
  margin: 20px auto;
  background: #70c5ce;
  border: 2px solid #444;
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.4);
}

/* Title */
h1 {
  color: white;
  text-shadow: 1px 1px 2px #000;
}

/* Buttons */
.button-container {
  margin: 10px auto;
}

.game-button {
  font-size: 24px;
  padding: 10px 20px;
  margin: 0 10px;
  cursor: pointer;
  transition: transform 0.1s ease;
}

.game-button:hover {
  transform: scale(1.05);
}

.game-button:active {
  transform: scale(0.95);
}

/* Controls text */
.controls-text {
  color: white;
  text-shadow: 1px 1px 2px #000;
  margin-top: 10px;
  font-size: 18px;
}

/* Leaderboard - desktop sidebar */
#leaderboard-container {
  position: fixed;
  top: 100px;
  left: 0;
  width: 260px;
  background: rgba(0,0,0,0.8);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  color: white;
  font-family: monospace;
  border-radius: 0 10px 10px 0;
  transform: translateX(-225px);
  transition: transform 0.3s ease;
  z-index: 999;
  box-shadow: 0 5px 20px rgba(0,0,0,0.5);
  overflow: hidden;
}

/* Open state (desktop) */
#leaderboard-container.open {
  transform: translateX(0);
}

/* Header */
#leaderboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px;
  cursor: pointer;
  background: rgba(255,255,255,0.1);
}

#leaderboard-header h3 {
  margin: 0;
  font-size: 18px;
}

/* Arrow button */
#toggleLeaderboard {
  background: none;
  border: none;
  color: white;
  font-size: 20px;
  cursor: pointer;
  transition: transform 0.3s ease;
}

/* Rotate arrow when open */
#leaderboard-container.open #toggleLeaderboard {
  transform: rotate(90deg);
}

/* Leaderboard list */
#leaderboard {
  list-style: none;
  padding: 10px;
  margin: 0;
  overflow-y: auto;
}

#leaderboard li {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px solid rgba(255,255,255,0.2);
}

#leaderboard li:last-child {
  border-bottom: none;
}

/* Mobile layout (<1024px) */
@media (max-width: 1024px) {
  #leaderboard-container {
    position: static;
    width: 90%;
    max-width: 350px;
    margin: 20px auto 30px auto;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.5);
    transform: none;
    overflow: visible;
  }

  #toggleLeaderboard {
    display: none; /* hide arrow on mobile */
  }
}