.balance-tray {
  position: relative;
  height: 136px;
  overflow: hidden;
  border: 1px solid #ced8e6;
  border-radius: 3px;
  background: #f4f7fc;
}
.balance-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  width: calc(18% + 18px);
  aspect-ratio: 1;
  translate: -50% -50%;
  border: 2px solid #829cc8;
  border-radius: 50%;
  background: #e6eefb;
}
.balance-tray[data-inside] .balance-ring { border-color: #5c9d81; background: #e4f2ec; }
.balance-track { position: absolute; inset: 0; rotate: var(--tilt, 0deg); }
.balance-rail {
  position: absolute;
  inset: calc(50% - 1px) 4% auto;
  height: 2px;
  background: #afbed4;
}
.balance-ball {
  position: absolute;
  top: 50%;
  left: 36%;
  width: 18px;
  height: 18px;
  translate: -50% -50%;
  border: 1px solid #204594;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 27%, #9ab9f7 0, #4c7bdb 31%, #214faf 72%);
}
.balance-controls { display: flex; justify-content: center; gap: 8px; margin-top: 10px; }
.balance-controls .lab-button { width: 64px; font-size: 19px; touch-action: none; user-select: none; }
.balance-controls .lab-button:active { background: #dce8fd; }
.balance-time { display: flex; align-items: center; gap: 10px; margin-top: 12px; }
.balance-time progress, .unchecked-progress { height: 7px; accent-color: var(--blue); }
.balance-time progress { flex: 1; min-width: 0; }
.balance-time span { min-width: 66px; color: var(--muted); font-size: 12px; text-align: right; font-variant-numeric: tabular-nums; }

.lock-preview {
  display: grid;
  place-items: center;
  min-height: 184px;
  border: 1px solid #d8dfe9;
  border-radius: 3px;
  background: #f3f5f8;
}
.lock-cylinder {
  position: relative;
  width: 104px;
  height: 104px;
  border: 1px solid #788699;
  border-radius: 50%;
  background: radial-gradient(circle, #a8b2bf 0 58%, #8793a3 60% 64%, #b5beca 66% 72%, #7c899a 100%);
  box-shadow: 0 3px 6px #18223734;
}
.lock-dial-face {
  position: absolute;
  inset: 14px;
  display: grid;
  place-items: center;
  border: 2px solid #687789;
  border-radius: 50%;
  rotate: var(--dial-angle, 0deg);
  background: linear-gradient(147deg, #edf0f3, #aab6c4);
  transition: rotate 200ms ease-out, border-color 150ms;
}
.lock-dial-face span {
  width: 10px;
  height: 32px;
  border-radius: 2px;
  background: #334053;
  box-shadow: inset 2px 0 3px #111a24aa;
}
.lock-dial-face::after {
  content: '';
  position: absolute;
  top: 5px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #536c8e;
}
.lock-cylinder[data-jammed] .lock-dial-face { border-color: #a65a57; }
.lock-cylinder[data-unlocked] .lock-dial-face { border-color: #3f8a6b; }
.lock-pin {
  position: absolute;
  top: -23px;
  left: calc(50% - 2px);
  width: 4px;
  height: 75px;
  transform-origin: center bottom;
  rotate: var(--pin-angle, 0deg);
  background: #52647c;
  box-shadow: 1px 0 0 #d7e0ec;
}
.lock-pin span { position: absolute; top: -5px; left: -3px; width: 10px; height: 22px; border-radius: 2px; background: #42649c; }
.lock-angle-label { display: block; margin-top: 10px; color: var(--muted); font-size: 13px; }
.lock-angle-label .slide-range { margin-top: 0; }
@media (prefers-reduced-motion: reduce) { .lock-dial-face { transition: none; } }

.mouse-maze {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  width: min(100%, 310px);
  margin-inline: auto;
  overflow: hidden;
  border: 2px solid #768aa7;
  border-radius: 3px;
  background: #f1f5fa;
  touch-action: manipulation;
}
.maze-cell {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  border-top: 2px solid #768aa7;
  border-left: 2px solid #768aa7;
  color: #24684b;
  font-size: clamp(8px, 3vw, 11px);
  font-weight: 700;
  cursor: pointer;
}
.maze-cell[data-open*="n"], .maze-cell:nth-child(-n+7) { border-top-color: transparent; }
.maze-cell[data-open*="w"], .maze-cell:nth-child(7n+1) { border-left-color: transparent; }
.maze-cell[data-exit] { background: #dff0e6; }
.maze-cell[data-player]::before {
  content: '';
  position: absolute;
  z-index: 1;
  width: 45%;
  aspect-ratio: 1;
  border: 2px solid white;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 1px var(--blue);
}
.maze-cell[data-mouse]::after { content: '🐁'; position: absolute; font-size: clamp(14px, 5vw, 24px); }
.maze-cell[data-player][data-mouse]::after { z-index: 2; translate: 26% 16%; }
.maze-controls { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; width: min(100%, 310px); margin: 10px auto 0; }
.maze-controls .lab-button { font-size: 17px; touch-action: manipulation; }

.choose-no-instruction { margin: 0; font-size: 13px; }
.choose-no-button { min-height: 36px; min-width: 50px; }
.leave-unchecked { border: 0; background: transparent; box-shadow: none; }
.leave-unchecked .challenge-body.padded { padding: 0; }
.leave-unchecked .check-box { font-size: 22px; font-weight: 700; }
.unchecked-instruction { width: min(100%, 324px); margin: 7px auto 0; color: var(--muted); font-size: 11px; text-align: center; }
.leave-unchecked[data-waiting] .unchecked-instruction { color: var(--ink); font-size: 13px; font-weight: 600; }
.unchecked-progress { display: block; width: min(100%, 210px); margin: 7px auto 0; }

.availability-board { width: min(100%, 290px); margin-inline: auto; }
.availability-signs { display: flex; justify-content: space-between; gap: 8px; padding-left: 21px; }
.availability-signs p {
  flex: 1;
  margin: 0;
  padding: 5px 6px;
  border: 1px solid #c9d4e4;
  border-radius: 3px;
  background: #f4f7fc;
  color: #354d74;
  font-size: 11px;
  line-height: 1.25;
  text-align: center;
}
.availability-signs strong { color: var(--ink); font-size: 12px; }
.availability-grid {
  display: grid;
  grid-template-columns: 17px repeat(3, minmax(0, 1fr));
  gap: 4px;
  align-items: center;
  margin-top: 6px;
  color: var(--muted);
  text-align: center;
  font-size: 11px;
  font-weight: 700;
}
.availability-square {
  min-height: 54px;
  border: 1px solid #a8b8cd;
  border-radius: 3px;
  background: #f4f7fb;
}
.availability-square:hover { background-color: #e1ebfa; }
.availability-square[data-striped], .availability-rule span {
  background-image: repeating-linear-gradient(135deg, transparent 0 5px, #c0cbdd 5px 7px);
}
.availability-rule {
  display: flex;
  align-items: start;
  gap: 7px;
  margin: 10px 0 0 21px;
  padding: 6px 7px;
  border: 1px solid #c9d4e4;
  border-radius: 3px;
  background: #f4f7fc;
  color: #35435b;
  font-size: 11px;
}
.availability-rule span { flex: 0 0 14px; height: 14px; border: 1px solid #a8b8cd; border-radius: 2px; }