:root {
  color-scheme: dark;
  --bg: #081513;
  --panel-border: rgba(195, 170, 112, 0.22);
  --text: #f7efe0;
  --muted: #c6baa0;
  --accent: #d89d47;
  --jade: #2f9182;
  --red: #bf5148;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.38);
  --radius: 28px;
  --font-heading: "BiauKai", "DFKai-SB", "Noto Serif TC", "PMingLiU", serif;
  --font-body: "Microsoft JhengHei", "PingFang TC", "Noto Sans TC", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(64, 137, 123, 0.28), transparent 36%),
    radial-gradient(circle at 85% 18%, rgba(216, 157, 71, 0.22), transparent 24%),
    linear-gradient(160deg, #071312 0%, #081816 40%, #050807 100%);
  overflow-x: hidden;
}

button,
select {
  font: inherit;
}

.app-shell {
  position: relative;
  min-height: 100vh;
  padding: clamp(1rem, 2vw, 1.5rem);
  isolation: isolate;
}

.atmosphere {
  position: fixed;
  pointer-events: none;
  filter: blur(16px);
  opacity: 0.7;
  z-index: -1;
}

.atmosphere--one {
  top: 6vh;
  left: -12vw;
  width: 36vw;
  height: 36vw;
  background: radial-gradient(circle, rgba(51, 144, 130, 0.35), transparent 72%);
  animation: float-a 10s ease-in-out infinite;
}

.atmosphere--two {
  right: -10vw;
  bottom: 10vh;
  width: 32vw;
  height: 32vw;
  background: radial-gradient(circle, rgba(191, 81, 72, 0.24), transparent 70%);
  animation: float-b 12s ease-in-out infinite;
}

.hero,
.layout {
  width: min(1220px, 100%);
  margin: 0 auto;
}

.hero {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  padding: clamp(0.75rem, 2vw, 1rem) 0 1rem;
}

.hero__eyebrow {
  margin: 0 0 0.45rem;
  color: var(--accent);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  font-size: 0.72rem;
}

.hero h1 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  line-height: 0.95;
  text-shadow: 0 10px 26px rgba(0, 0, 0, 0.34);
}

.hero__lead {
  margin: 0.9rem 0 0;
  max-width: 40rem;
  color: var(--muted);
  line-height: 1.6;
}

.hero__actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(320px, 0.9fr);
  gap: 1rem;
  align-items: start;
}

.game-column,
.info-column {
  display: grid;
  gap: 1rem;
}

.card {
  position: relative;
  background:
    linear-gradient(160deg, rgba(17, 36, 33, 0.82), rgba(7, 16, 15, 0.92)),
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.control-bar {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  padding: 1rem;
}

.field {
  display: grid;
  gap: 0.42rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.field--buttons {
  align-content: start;
}

.view-controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.65rem;
}

.button,
select {
  border: 1px solid rgba(216, 157, 71, 0.28);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(216, 157, 71, 0.18), rgba(20, 32, 30, 0.92));
  color: var(--text);
  min-height: 3rem;
  padding: 0.75rem 1rem;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.button {
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.button:hover,
.button:focus-visible,
select:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.24);
  border-color: rgba(216, 157, 71, 0.54);
  outline: none;
}

.button--secondary {
  background: linear-gradient(180deg, rgba(47, 145, 130, 0.22), rgba(14, 34, 31, 0.9));
}

.button--ghost {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(16, 29, 28, 0.9));
}

.button[disabled],
select[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.status-card {
  padding: 1rem 1.15rem;
}

.status-card__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  min-height: 2.1rem;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(47, 145, 130, 0.25), rgba(24, 52, 48, 0.9));
  color: #dff8f1;
  font-weight: 700;
}

.status-mini,
.status-card__foot,
.install-hint,
.tips p,
.rules {
  color: var(--muted);
}

.status-card__headline {
  margin: 0.9rem 0 0.3rem;
  font-size: clamp(1rem, 2vw, 1.2rem);
}

.status-card__foot,
.install-hint {
  margin: 0.15rem 0 0;
  line-height: 1.55;
}

.board-card {
  padding: clamp(0.8rem, 1.7vw, 1.25rem);
  overflow: hidden;
}

.board-stage {
  position: relative;
  perspective: 1500px;
  padding: clamp(0.35rem, 1.2vw, 0.75rem) clamp(0.65rem, 1.4vw, 0.9rem) clamp(0.5rem, 1.2vw, 0.8rem) clamp(0.1rem, 0.5vw, 0.35rem);
  touch-action: pan-y;
  user-select: none;
  -webkit-user-select: none;
}

.board-stage[data-perspective="angled"] {
  touch-action: none;
}

.board-stage__halo {
  position: absolute;
  inset: auto 16% 4% 7%;
  height: 18%;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(47, 145, 130, 0.4), transparent 70%);
  filter: blur(28px);
  pointer-events: none;
}

.board-stage__platform {
  position: absolute;
  inset: 9% 12% 5% 4%;
  border-radius: 42px;
  background:
    linear-gradient(180deg, rgba(216, 157, 71, 0.14), rgba(18, 31, 29, 0.9)),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05), transparent);
  transform: translateY(2rem) rotateX(68deg);
  pointer-events: none;
}

.board {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(0.35rem, 1vw, 0.65rem);
  width: min(82vw, 32.5rem);
  margin: 0 auto 0 0;
  padding: clamp(0.65rem, 1.8vw, 1rem);
  border-radius: 36px;
  background:
    linear-gradient(145deg, rgba(108, 83, 47, 0.92), rgba(59, 42, 21, 0.96)),
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.12), transparent 40%);
  box-shadow:
    inset 0 2px 0 rgba(255, 255, 255, 0.2),
    inset 0 -24px 30px rgba(0, 0, 0, 0.25),
    0 24px 50px rgba(0, 0, 0, 0.38);
  contain: layout paint style;
  transform-style: preserve-3d;
  transition: transform 320ms ease, filter 320ms ease;
  --board-tilt: 44deg;
  --board-spin: -10deg;
}

.board[data-perspective="angled"] {
  transform: rotateX(var(--board-tilt)) rotateZ(var(--board-spin));
  filter: drop-shadow(0 26px 34px rgba(0, 0, 0, 0.28));
}

.board[data-perspective="flat"] {
  transform: none;
}

.board[data-interaction="locked"] .cell {
  cursor: default;
  pointer-events: none;
}

.board-stage[data-perspective="angled"]:not([data-dragging="true"]) .board {
  cursor: grab;
}

.board-stage[data-dragging="true"] .board {
  cursor: grabbing;
  transition: none;
}

.cell {
  position: relative;
  aspect-ratio: 1;
  border: none;
  padding: 0;
  border-radius: 24px;
  background: transparent;
  cursor: pointer;
  transform-style: preserve-3d;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.cell::before,
.cell::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 24px;
}

.cell::before {
  background:
    linear-gradient(180deg, rgba(236, 206, 160, 0.18), rgba(85, 59, 33, 0.9)),
    radial-gradient(circle at top, rgba(255, 255, 255, 0.14), transparent 60%);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.18),
    inset 0 -8px 16px rgba(0, 0, 0, 0.2);
}

.cell::after {
  inset: 10% 10% -10%;
  background: linear-gradient(180deg, rgba(26, 18, 9, 0.2), rgba(6, 5, 4, 0.5));
  filter: blur(5px);
  opacity: 0.7;
  transform: translateZ(-16px);
}

.cell--disabled {
  cursor: default;
}

.cell--selected::before {
  background:
    linear-gradient(180deg, rgba(47, 145, 130, 0.35), rgba(76, 57, 25, 0.88)),
    radial-gradient(circle at top, rgba(255, 255, 255, 0.16), transparent 55%);
}

.cell--last::before {
  box-shadow:
    inset 0 0 0 2px rgba(216, 157, 71, 0.55),
    inset 0 1px 0 rgba(255, 255, 255, 0.18),
    inset 0 -8px 16px rgba(0, 0, 0, 0.2);
}

.cell__marker {
  position: absolute;
  inset: 26%;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 700;
  color: rgba(8, 24, 22, 0.92);
  opacity: 0;
  transform: translateZ(18px);
}

.cell--movable .cell__marker {
  opacity: 1;
  background: radial-gradient(circle, rgba(47, 145, 130, 0.92), rgba(47, 145, 130, 0.1) 62%, transparent 64%);
}

.cell--capturable .cell__marker {
  opacity: 1;
  background: radial-gradient(circle, rgba(191, 81, 72, 0.95), rgba(191, 81, 72, 0.14) 62%, transparent 64%);
}

.piece {
  position: absolute;
  inset: 11%;
  transform-style: preserve-3d;
  transition: transform 180ms ease;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.cell:hover .piece,
.cell:focus-visible .piece,
.cell--selected .piece {
  transform: translateY(-2px);
}

.piece::before {
  content: "";
  position: absolute;
  inset: 15% 10% 8%;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(0, 0, 0, 0.32), transparent 72%);
  transform: translateY(16px) translateZ(-4px);
  filter: blur(5px);
}

.piece__body,
.piece__top {
  position: absolute;
  left: 10%;
  right: 10%;
  border-radius: 999px;
}

.piece__body {
  top: 24%;
  bottom: 18%;
  background: linear-gradient(90deg, rgba(55, 34, 17, 0.92), rgba(153, 118, 78, 0.9), rgba(72, 44, 18, 0.92));
}

.piece__top {
  top: 4%;
  bottom: 32%;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.38), rgba(255, 255, 255, 0.06) 46%, transparent 60%),
    linear-gradient(180deg, rgba(247, 237, 216, 0.96), rgba(207, 180, 138, 0.98));
  transform: translateZ(18px);
  box-shadow:
    inset 0 2px 0 rgba(255, 255, 255, 0.26),
    inset 0 -10px 18px rgba(117, 74, 31, 0.24),
    0 16px 20px rgba(0, 0, 0, 0.18);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.piece--hidden .piece__top {
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.18), transparent 48%),
    linear-gradient(180deg, rgba(35, 70, 65, 0.96), rgba(16, 36, 34, 0.98));
}

.piece--red .piece__top {
  color: var(--red);
}

.piece--black .piece__top {
  color: #23211c;
}

.piece__glyph {
  display: grid;
  gap: 0.15rem;
  justify-items: center;
  font-family: var(--font-heading);
}

.piece__char {
  font-size: clamp(1.2rem, 3vw, 2rem);
  line-height: 1;
}

.piece__type {
  font-size: 0.64rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(17, 17, 17, 0.72);
}

.piece--hidden .piece__char,
.piece--hidden .piece__type {
  color: rgba(228, 255, 250, 0.88);
}

.summary-stack {
  display: grid;
  gap: 0.75rem;
}

.team-card {
  display: grid;
  gap: 0.45rem;
  padding: 0.8rem 0.9rem;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.team-card__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.65rem;
}

.team-card__title {
  font-weight: 700;
}

.team-card__title--red {
  color: #f4b3ab;
}

.team-card__title--black {
  color: #ede3c8;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.32rem 0.56rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--muted);
  font-size: 0.86rem;
}

.chip--empty {
  opacity: 0.36;
}

.chip__char {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--text);
}

.panel,
.tips {
  padding: 1rem 1.1rem;
}

.board-help {
  margin: 0.85rem 0 0;
  text-align: center;
  color: var(--muted);
  line-height: 1.6;
}

.panel h2,
.tips h2 {
  margin: 0 0 0.8rem;
  font-family: var(--font-heading);
  font-size: 1.3rem;
}

.rules {
  margin: 0;
  padding-left: 1.15rem;
  line-height: 1.7;
}

@media (max-width: 980px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .hero {
    flex-direction: column;
  }

  .hero__actions {
    justify-content: flex-start;
  }
}

@media (max-width: 700px) {
  .app-shell {
    padding: max(0.75rem, env(safe-area-inset-top)) 0.75rem max(0.75rem, env(safe-area-inset-bottom));
  }

  .control-bar {
    grid-template-columns: 1fr;
  }

  .button,
  select {
    min-height: 3.2rem;
  }

  .board {
    width: min(87vw, 27.8rem);
    margin-left: 0;
  }
}

@media (hover: none) and (pointer: coarse) {
  .board-stage__halo {
    filter: blur(14px);
    opacity: 0.4;
  }

  .board-stage__platform {
    opacity: 0.78;
  }

  .board[data-perspective="angled"] {
    filter: none;
  }

  .board {
    box-shadow:
      inset 0 2px 0 rgba(255, 255, 255, 0.18),
      inset 0 -14px 20px rgba(0, 0, 0, 0.2),
      0 14px 24px rgba(0, 0, 0, 0.28);
  }

  .cell::after,
  .piece::before {
    filter: none;
    opacity: 0.42;
  }

  .piece__top {
    box-shadow:
      inset 0 1px 0 rgba(255, 255, 255, 0.22),
      inset 0 -7px 12px rgba(117, 74, 31, 0.2),
      0 8px 10px rgba(0, 0, 0, 0.16);
  }
}

@keyframes float-a {
  0%,
  100% {
    transform: translate3d(0, 0, 0);
  }
  50% {
    transform: translate3d(5vw, 3vh, 0);
  }
}

@keyframes float-b {
  0%,
  100% {
    transform: translate3d(0, 0, 0);
  }
  50% {
    transform: translate3d(-4vw, -4vh, 0);
  }
}