html, body {
  margin: 0;
  height: 100%;
  background: #050a1a;
  overflow: hidden;
  cursor: none; /* 遊戲區隱藏系統游標，只顯示自繪的環 */
  user-select: none;
  -webkit-user-select: none;
  font-family: "Microsoft JhengHei", "Noto Sans TC", "PingFang TC", sans-serif;
}

canvas {
  display: block;
  touch-action: none;
}

noscript {
  color: #f4fbff;
  font-size: 32px;
}

/* 工作人員面板（Shift+D） */
#staff {
  position: fixed;
  top: 20px;
  left: 20px;
  width: 420px;
  padding: 18px 22px 22px;
  max-height: calc(100vh - 80px);
  overflow-y: auto;
  background: rgba(6, 16, 36, 0.96);
  border: 2px solid #35f0ff;
  border-radius: 14px;
  color: #f4fbff;
  font-size: 18px;
  cursor: auto;
  user-select: auto;
  z-index: 10;
}

#staff[hidden] {
  display: none;
}

#staff h2 {
  margin: 0 0 4px;
  font-size: 24px;
  color: #ffd24a;
}

#staff .tip {
  margin: 0 0 12px;
  color: #9fb4c8;
  font-size: 15px;
}

#staff .row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin: 8px 0;
}

#staff input {
  width: 90px;
  padding: 6px 8px;
  font-size: 18px;
  background: #0b1d38;
  color: #f4fbff;
  border: 1px solid #35f0ff;
  border-radius: 6px;
}

#staff .btns {
  display: flex;
  gap: 10px;
  margin-top: 12px;
}

#staff button {
  flex: 1;
  padding: 10px 8px;
  font-size: 17px;
  font-family: inherit;
  color: #f4fbff;
  background: #0b2a40;
  border: 1px solid #35f0ff;
  border-radius: 8px;
  cursor: pointer;
}

#staff button.danger {
  border-color: #ff5a4a;
  background: #3a1016;
}