* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: #ffffff;
  color: #1a1a2e;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 16px;
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  gap: 16px;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
}

.header {
  text-align: center;
}

.title {
  font-size: 2rem;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: center;
}

select, button {
  padding: 10px 15px;
  border: none;
  border-radius: 8px;
  background: #1a1a2e;
  color: white;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 14px;
  font-weight: 500;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 120px;
  height: 40px;
  background: #1a1a2e;
  border-radius: 8px;
  padding: 0 12px;
  cursor: pointer;
  transition: background 0.3s ease;
}

input[type="range"]:hover {
  background: #2d2d5e;
}

input[type="range"]::-webkit-slider-runnable-track {
  height: 4px;
  background: rgba(255,255,255,0.4);
  border-radius: 2px;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: white;
  margin-top: -6px;
  cursor: pointer;
}

input[type="range"]::-moz-range-track {
  height: 4px;
  background: rgba(255,255,255,0.4);
  border-radius: 2px;
}

input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: white;
  border: none;
  cursor: pointer;
}

select:hover, button:hover {
  background: #2d2d5e;
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0,0,0,0.15);
}

button:active {
  transform: translateY(0);
}

#character-container {
  position: relative;
  width: 700px;
  height: 450px;
  border: 3px solid rgba(0,0,0,0.15);
  border-radius: 15px;
  overflow: hidden;
  background: linear-gradient(to right,
    hsl(0,80%,35%), hsl(45,80%,35%), hsl(90,80%,35%),
    hsl(135,80%,35%), hsl(180,80%,35%), hsl(225,80%,35%),
    hsl(270,80%,35%), hsl(315,80%,35%), hsl(360,80%,35%)
  );
  box-shadow: 0 0 30px rgba(0,0,0,0.5);
  backdrop-filter: blur(10px);
  touch-action: none;
}

.character, .afterimage {
  position: absolute;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.8);
  user-select: none;
  pointer-events: none;
}

.character {
  z-index: 10;
  box-shadow: 0 0 20px rgba(255,255,255,0.4);
  border: 2px solid rgba(255,255,255,0.3);
  transition: transform 0.1s ease-out;
}

.character.dragging {
  transform: scale(1.1);
  box-shadow: 0 0 30px rgba(255,255,255,0.6);
}

.afterimage {
  opacity: 0.6;
  transition: opacity 0.8s ease-out;
  pointer-events: none;
  z-index: 1;
}

.touch-hint {
  position: absolute;
  top: 25%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(255,255,255,0.1);
  padding: 15px 25px;
  border-radius: 25px;
  font-size: 14px;
  opacity: 0.7;
  pointer-events: none;
  animation: pulse 2s infinite;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.2);
}

@keyframes pulse {
  0%, 100% { opacity: 0.7; transform: translate(-50%, -50%) scale(1); }
  50%       { opacity: 0.9; transform: translate(-50%, -50%) scale(1.05); }
}

@media (max-width: 768px) {
  .title { font-size: 1.5rem; }
  .controls { flex-direction: column; align-items: stretch; }
  .control-group { justify-content: center; }
  #character-container {
    width: 90vw;
    max-width: 500px;
    height: 300px;
  }
  .touch-hint {
    font-size: 12px;
    padding: 12px 20px;
  }
}

@media (max-width: 480px) {
  body { padding: 10px; gap: 12px; }
  .title { font-size: 1.2rem; }
  select, button { padding: 8px 12px; }
  #character-container { height: 250px; }
  .character, .afterimage {
    width: 50px;
    height: 50px;
    font-size: 25px;
  }
  .touch-hint {
    font-size: 11px;
    padding: 10px 15px;
  }
}