* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { width: 100%; height: 100%; background: #dff1ff; overflow: hidden; }
body {
  display: flex; justify-content: center; align-items: center;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  /* respect device safe areas (notch) */
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}
canvas { display: block; touch-action: none; }

#controls {
  position: fixed;
  top: calc(8px + env(safe-area-inset-top));
  right: calc(8px + env(safe-area-inset-right));
  z-index: 20;
  display: flex; gap: 6px; align-items: center;
  padding: 5px 8px; border-radius: 18px;
  background: rgba(255,255,255,0.6); backdrop-filter: blur(6px);
  box-shadow: 0 3px 12px rgba(120,170,200,0.28);
  font-size: 11px; color: #3a6480; user-select: none;
}
#controls .ctl-btn {
  padding: 3px 8px; border-radius: 12px; cursor: pointer;
  background: rgba(255,255,255,0.75); border: 1px solid rgba(140,185,215,0.4);
  white-space: nowrap;
}
#controls .ctl-btn.buy { background: rgba(0,229,255,0.18); border-color: #00e5ff; color: #00e5ff; }
#controls .ctl-btn.owned { color: #00ffaa; border-color: rgba(0,255,170,0.4); }
#controls .ctl-btn.lang { display: flex; align-items: center; gap: 3px; }
#controls .ctl-btn.lang .caret { font-size: 9px; opacity: 0.6; }

/* language dropdown menu */
.lang-menu {
  position: absolute; top: calc(100% + 6px); right: 0; z-index: 30;
  min-width: 120px; max-height: 60vh; overflow-y: auto;
  padding: 5px; border-radius: 14px;
  background: rgba(255,255,255,0.92); backdrop-filter: blur(10px);
  box-shadow: 0 6px 22px rgba(120,170,200,0.45);
  display: flex; flex-direction: column; gap: 2px;
}
.lang-menu[hidden] { display: none; }
.lang-menu .lang-item {
  padding: 8px 12px; border-radius: 9px; cursor: pointer;
  font-size: 13px; color: #3a6480; white-space: nowrap;
}
.lang-menu .lang-item:hover { background: rgba(140,185,215,0.18); }
.lang-menu .lang-item.sel { background: rgba(0,229,255,0.16); color: #0091a7; font-weight: 600; }
#controls .skin-dots { display: flex; gap: 6px; align-items: center; }
#controls .skin-dot {
  width: 20px; height: 20px; border-radius: 50%; cursor: pointer; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center; font-size: 10px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.5);
}
#controls .skin-dot.sel { box-shadow: 0 0 0 2.5px #fff, 0 0 0 4px rgba(0,0,0,0.5); }
#controls .skin-dot.locked { filter: grayscale(0.5) brightness(0.7); }