:root {
  --hand-w: 5.2rem;
  --hand-h: 7.5rem;
  --fan-pivot: calc(100% + 10rem);
  --peek-lift: -0.8rem;
  --hand-dim: 0.45;
  --hand-unusable-filter: brightness(0.62) saturate(0.4);
  --toast-pop-duration: 2.6s;
  --toast-pop-rise: 2.4rem;
}

.hand-list {
  position: absolute;
  left: 50%;
  bottom: 4.1rem;
  width: 0;
  height: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.hand-list,
.hand-slot,
.hand-card {
  touch-action: none;
}

.hand-slot {
  position: absolute;
  bottom: 0;
  left: 0;
  width: var(--hand-w);
  height: var(--hand-h);
  translate: -50% 0;
  transform: rotate(calc((var(--fan-a, 0) + var(--fan-push, 0)) * 1deg));
  transform-origin: 50% var(--fan-pivot);
  transition: transform var(--t-fast), filter var(--t-fast);
}

.hand-card {
  display: block;
  width: 100%;
  height: 100%;
  padding: 0;
  cursor: pointer;
  transform: translateY(var(--card-lift, 0rem)) scale(var(--card-scale, 1));
  transform-origin: 50% 100%;
  transition: transform var(--t-fast), box-shadow var(--t-fast);
}

.hand-slot--peek {
  z-index: 12;
}

.hand-slot--peek .hand-card {
  --card-lift: var(--peek-lift);
  box-shadow: 0 0 0 var(--bw) var(--c-accent-dim), var(--shadow-pop);
}

/* 以亮度濾鏡壓暗（卡面維持不透明），避免重疊卡牌的半透明疊影 */
.hand-list--dim .hand-slot:not(.hand-slot--selected):not(.hand-slot--peek) {
  filter: brightness(var(--hand-dim));
}

/* 當前不可使用的手牌：淡化＋去飽和（仍可點選，點選出現彈入提示） */
.hand-list .hand-slot--unusable:not(.hand-slot--selected):not(.hand-slot--peek) {
  filter: var(--hand-unusable-filter);
}

.hand-slot--selected {
  z-index: 11;
}

.hand-slot--selected .hand-card {
  --card-lift: var(--peek-lift);
  box-shadow: 0 0 0 var(--bw-bold) var(--c-accent), var(--shadow-pop);
}

.peek-layer {
  position: absolute;
  left: 50%;
  bottom: 11.8rem;
  translate: -50% 0;
  z-index: 14;
  pointer-events: none;
}

.peek-layer[hidden] {
  display: none;
}

/* 浮層開啟時放大層升至浮層之上，供情報 chip 滑入檢視 */
body:has(.overlay-root:not([hidden])) .peek-layer {
  z-index: 55;
}

.hand-actions {
  position: absolute;
  left: 50%;
  bottom: 0.5rem;
  translate: -50% 0;
  width: 4.6rem;
  display: grid;
  gap: 0.3rem;
  z-index: 13;
}

.hand-actions[hidden] {
  display: none;
}

.hand-actions .btn {
  width: 100%;
  padding: 0.3rem 0.2rem;
  font-size: 0.7rem;
}

/* 三欄格線：兩側 1fr 對稱使提示章對整體寬度置中；右欄保底不被壓縮以免與按鈕重疊 */
.hand-top {
  position: absolute;
  top: 0.15rem;
  left: 0.5rem;
  right: 0.5rem;
  display: grid;
  grid-template-columns: minmax(min-content, 1fr) auto minmax(min-content, 1fr);
  align-items: start;
  gap: 0.4rem;
  z-index: 9;
}

.prompt-bar {
  grid-column: 2;
  min-width: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.3rem;
}

.prompt-bar[hidden] {
  display: none;
}

.turn-actions {
  grid-column: 3;
  justify-self: end;
  display: flex;
  gap: 0.3rem;
}

.turn-back {
  grid-column: 1;
  justify-self: start;
  display: flex;
  gap: 0.3rem;
}

.turn-back[hidden] {
  display: none;
}

.turn-back .btn {
  padding: 0.3rem 0.55rem;
  font-size: 0.72rem;
  white-space: nowrap;
}

.turn-actions[hidden] {
  display: none;
}

.turn-actions .btn {
  padding: 0.3rem 0.55rem;
  font-size: 0.72rem;
  white-space: nowrap;
}

.prompt-label {
  font-size: 0.72rem;
  color: var(--c-accent-ink);
  background: var(--c-surface-2);
  border: var(--bw) solid var(--c-border);
  border-radius: 0.6rem;
  padding: 0.25rem 0.7rem;
  text-align: center;
}

.hand-toast {
  position: absolute;
  left: 50%;
  bottom: 0.6rem;
  translate: -50% 0;
  z-index: 15;
  max-width: 86%;
  font-size: 0.72rem;
  color: var(--c-ink);
  background: var(--c-surface-2);
  border: var(--bw) solid var(--c-accent);
  border-radius: 0.6rem;
  padding: 0.25rem 0.7rem;
  text-align: center;
  opacity: 0;
  pointer-events: none;
}

.hand-toast[hidden] {
  display: none;
}

.hand-toast--play {
  animation: hand-toast-pop var(--toast-pop-duration) ease forwards;
}

@keyframes hand-toast-pop {
  0% {
    translate: -50% var(--toast-pop-rise);
    opacity: 0;
  }
  14% {
    translate: -50% 0;
    opacity: 1;
  }
  78% {
    translate: -50% 0;
    opacity: 1;
  }
  100% {
    translate: -50% 0;
    opacity: 0;
  }
}