/* ===== Theme variables ===== */
:root {
  --bg-1: #fff8ea;
  --bg-2: #f3e1c2;
  --bg-3: #d5b47b;
  --board-base: linear-gradient(145deg, #744719, #4d2f12 44%, #3a220d);
  --board-surface: linear-gradient(155deg, #e0b675, #cc944f 37%, #d5a764 72%, #b77b35);
  --line: rgba(61, 36, 15, 0.85);
  --line-outer: rgba(41, 24, 10, 0.95);
  --star: rgba(54, 32, 15, 0.9);
  --panel-bg: rgba(255, 248, 234, 0.82);
  --panel-border: rgba(151, 109, 48, 0.28);
  --text: #27180c;
  --text-soft: #5b3e20;
  --accent: #a53b1f;
  --accent-2: #75210d;
  --hint-spot: rgba(255, 220, 60, 0.85);
  --last-mark: #ff3b3b;
}

body[data-theme="marble"] {
  --bg-1: #f3f4f6;
  --bg-2: #d8dde4;
  --bg-3: #9aa4b4;
  --board-base: linear-gradient(145deg, #2c2f36, #1a1c22 60%);
  --board-surface: linear-gradient(150deg, #f1f1f4, #cfd2da 45%, #e8eaee 75%, #b5b8c1);
  --line: rgba(40, 45, 55, 0.7);
  --line-outer: rgba(20, 25, 35, 0.9);
  --star: rgba(40, 45, 55, 0.85);
  --panel-bg: rgba(255, 255, 255, 0.78);
  --panel-border: rgba(80, 90, 105, 0.3);
  --text: #1d2230;
  --text-soft: #4b5566;
  --accent: #4566a3;
  --accent-2: #2b446e;
}

body[data-theme="cyber"] {
  --bg-1: #110b1f;
  --bg-2: #1c0f33;
  --bg-3: #2c0e4f;
  --board-base: linear-gradient(145deg, #100a26, #060211 60%);
  --board-surface: linear-gradient(150deg, #1b0e3c, #2a1057 50%, #190a32);
  --line: rgba(0, 255, 220, 0.55);
  --line-outer: rgba(255, 60, 200, 0.85);
  --star: rgba(255, 240, 90, 0.95);
  --panel-bg: rgba(20, 10, 40, 0.78);
  --panel-border: rgba(120, 90, 220, 0.5);
  --text: #e6e1ff;
  --text-soft: #b9aef0;
  --accent: #ff3eb5;
  --accent-2: #00d8ff;
  --hint-spot: rgba(0, 255, 220, 0.85);
}

body[data-theme="sakura"] {
  --bg-1: #fff5f6;
  --bg-2: #fcd9e0;
  --bg-3: #e9a4b6;
  --board-base: linear-gradient(145deg, #6a3d50, #43222e 70%);
  --board-surface: linear-gradient(155deg, #ffe7ec, #f5c2cd 45%, #fff0f3 75%, #e8a8ba);
  --line: rgba(110, 40, 70, 0.75);
  --line-outer: rgba(80, 20, 50, 0.92);
  --star: rgba(120, 40, 70, 0.85);
  --panel-bg: rgba(255, 245, 247, 0.85);
  --panel-border: rgba(196, 110, 140, 0.32);
  --text: #3a1a26;
  --text-soft: #7a4055;
  --accent: #c84777;
  --accent-2: #8b2c52;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  padding: 18px;
  color: var(--text);
  font-family: "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  background:
    radial-gradient(circle at 18% 12%, var(--bg-1) 0%, var(--bg-2) 38%, var(--bg-3) 85%);
  transition: background 0.6s ease, color 0.4s ease;
}

.app {
  width: min(1280px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 20px;
  align-items: start;
}

.panel {
  padding: 16px;
  border-radius: 14px;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.14);
  backdrop-filter: blur(6px);
  max-height: calc(100vh - 36px);
  overflow-y: auto;
}

.panel-head h1 {
  margin: 0 0 6px;
  font-size: 1.55rem;
  letter-spacing: 0.04em;
}

.status {
  margin: 0 0 10px;
  font-size: 1.02rem;
  font-weight: 700;
}

.timer-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 12px;
}
.timer {
  padding: 6px 10px;
  border-radius: 9px;
  background: rgba(0,0,0,0.04);
  border: 1px solid var(--panel-border);
  font-variant-numeric: tabular-nums;
  display: flex;
  justify-content: space-between;
  font-size: 0.92rem;
}
.timer.urgent .timer-value { color: #d73a3a; animation: pulse 0.6s infinite; }
.timer.active { box-shadow: 0 0 0 2px var(--accent); }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

.action-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.action-row button { flex: 1 1 auto; min-width: 80px; }

button {
  padding: 9px 11px;
  border: 0;
  border-radius: 10px;
  color: #fff;
  font-size: 0.92rem;
  background: linear-gradient(160deg, var(--accent), var(--accent-2));
  cursor: pointer;
  transition: transform 0.15s ease, filter 0.15s ease;
  font-family: inherit;
}
button:hover:not(:disabled) { transform: translateY(-1px); filter: brightness(1.06); }
button:disabled { cursor: not-allowed; filter: saturate(0.7) brightness(0.92); transform: none; }

button.ghost {
  background: rgba(0, 0, 0, 0.06);
  color: var(--text);
  border: 1px solid var(--panel-border);
}
button.ghost:hover:not(:disabled) { background: rgba(0, 0, 0, 0.1); }
button.mini { padding: 6px 10px; font-size: 0.85rem; }
button.preset { flex: 1 1 0; padding: 7px 4px; font-size: 0.85rem; }

.install-btn {
  background: linear-gradient(160deg, #2f7a39, #1f5a2a);
  width: 100%;
}

.install-btn[hidden] { display: none; }

details {
  margin: 8px 0;
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  background: rgba(255,255,255,0.4);
  overflow: hidden;
}
body[data-theme="cyber"] details { background: rgba(255,255,255,0.05); }

details > summary {
  padding: 9px 12px;
  font-weight: 700;
  font-size: 0.94rem;
  cursor: pointer;
  user-select: none;
  list-style: none;
}
details > summary::-webkit-details-marker { display: none; }
details > summary::before {
  content: "▸ ";
  display: inline-block;
  transition: transform 0.2s;
}
details[open] > summary::before { content: "▾ "; }

.ctrl {
  display: grid;
  gap: 7px;
  padding: 4px 12px 12px;
}
.ctrl label { font-size: 0.88rem; }

select, input[type="text"], textarea {
  width: 100%;
  padding: 7px 9px;
  border-radius: 9px;
  border: 1px solid var(--panel-border);
  color: var(--text);
  background: rgba(255, 255, 255, 0.85);
  font-family: inherit;
}
body[data-theme="cyber"] select,
body[data-theme="cyber"] input,
body[data-theme="cyber"] textarea {
  background: rgba(20, 10, 40, 0.85);
  color: var(--text);
}
input[type="range"] { width: 100%; }

.check-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
}
.check-row input { margin: 0; }

.radio-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
  font-size: 0.85rem;
}

.preset-row {
  display: flex;
  gap: 4px;
  margin-bottom: 4px;
}

.replay-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 4px 0;
}
.replay-pos {
  flex: 1;
  text-align: center;
  font-variant-numeric: tabular-nums;
  font-size: 0.9rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  text-align: center;
  margin-bottom: 6px;
}
.stats-grid > div {
  padding: 7px 4px;
  border-radius: 8px;
  background: rgba(0,0,0,0.05);
}
.stats-grid span { display: block; font-size: 0.75rem; color: var(--text-soft); }
.stats-grid strong { font-size: 1.15rem; }

.sub-h { margin: 8px 0 4px; font-size: 0.92rem; }

.achv-list {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 0.85rem;
  display: grid;
  gap: 4px;
}
.achv-list li {
  padding: 5px 8px;
  border-radius: 7px;
  background: rgba(0,0,0,0.04);
  display: flex;
  justify-content: space-between;
}
.achv-list li.locked { opacity: 0.45; }
.achv-list .achv-icon { font-size: 1.1em; }

.stars { font-size: 1.1rem; letter-spacing: 2px; }

.hint {
  margin: 6px 0 0;
  font-size: 0.85rem;
  line-height: 1.45;
  color: var(--text-soft);
}
.hint-foot { margin-top: 12px; }

/* Mode visibility */
body[data-mode="pvp"] .pve-only,
body[data-mode="online"] .pve-only,
body[data-mode="puzzle"] .pve-only,
body[data-mode="daily"] .pve-only { display: none; }

/* ===== Scene & board ===== */
.scene-wrap {
  min-height: 760px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.scene {
  position: relative;
  width: min(92vw, 880px);
  height: min(92vh, 780px);
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 20px;
  perspective: 1400px;
  perspective-origin: 50% 36%;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 18%, rgba(255, 248, 230, 0.45), rgba(211, 173, 112, 0.22) 58%, rgba(145, 96, 39, 0.3)),
    linear-gradient(150deg, var(--bg-2), var(--bg-3));
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.08);
  transition: background 0.5s ease;
  -webkit-transform: translateZ(0);
  transform: translateZ(0);
}

body[data-theme="cyber"] .scene {
  background:
    radial-gradient(circle at 50% 12%, rgba(120, 60, 200, 0.4), rgba(40, 10, 80, 0.55) 60%, rgba(10, 5, 30, 0.95)),
    linear-gradient(150deg, #1c0f33, #060211);
}

body[data-theme="sakura"] .scene {
  background:
    radial-gradient(circle at 50% 18%, rgba(255, 230, 240, 0.55), rgba(232, 180, 200, 0.3) 58%, rgba(190, 110, 145, 0.5)),
    linear-gradient(150deg, #ffe2eb, #f1b6c5);
}

.weather-canvas, .confetti-canvas {
  position: absolute;
  inset: 0;
  pointer-events: none;
  width: 100%;
  height: 100%;
}
.confetti-canvas { z-index: 5; }

.commentary {
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  padding: 8px 14px;
  border-radius: 18px;
  background: rgba(0, 0, 0, 0.75);
  color: #fff;
  font-size: 0.9rem;
  z-index: 6;
  max-width: 80%;
  text-align: center;
  animation: bubbleIn 0.3s ease;
}
@keyframes bubbleIn {
  from { opacity: 0; transform: translate(-50%, -8px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

.board-3d {
  width: clamp(320px, 76vmin, 720px);
  aspect-ratio: 1 / 1;
  position: relative;
  transform-style: preserve-3d;
  --board-thickness: clamp(22px, 3.8vmin, 36px);
  --stone-size: 74%;
  cursor: grab;
  will-change: transform;
  transition: transform 0.18s linear;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}
.board-3d.is-dragging { cursor: grabbing; transition: none; }

.board-base {
  position: absolute;
  inset: 1.4%;
  border-radius: 22px;
  background: var(--board-base);
  transform: translateZ(calc(var(--board-thickness) * -0.42));
  transform-style: preserve-3d;
  box-shadow:
    0 30px 0 rgba(47, 27, 9, 0.62),
    0 48px 70px rgba(0, 0, 0, 0.42),
    0 12px 20px rgba(0, 0, 0, 0.3);
}
.board-base::before,
.board-base::after {
  content: "";
  position: absolute;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(255,255,255,0.1), rgba(0,0,0,0.42)), var(--board-base);
}
.board-base::before {
  left: 4%;
  right: 4%;
  bottom: calc(var(--board-thickness) * -0.84);
  height: var(--board-thickness);
  border-radius: 0 0 18px 18px;
  transform-origin: top center;
  transform: rotateX(-72deg);
}
.board-base::after {
  top: 4%;
  bottom: 4%;
  right: calc(var(--board-thickness) * -0.84);
  width: var(--board-thickness);
  border-radius: 0 18px 18px 0;
  transform-origin: left center;
  transform: rotateY(72deg);
}

.board-surface {
  position: absolute;
  inset: 3.2%;
  border-radius: 16px;
  overflow: hidden;
  transform: translateZ(var(--board-thickness));
  transform-style: preserve-3d;
  background:
    repeating-linear-gradient(90deg, rgba(255, 241, 208, 0.08), rgba(255, 241, 208, 0.08) 2px, rgba(0, 0, 0, 0.02) 4px, rgba(0, 0, 0, 0.02) 7px),
    var(--board-surface);
  box-shadow:
    inset 0 2px 2px rgba(255,255,255,0.18),
    inset 0 -6px 16px rgba(72, 39, 14, 0.2),
    0 14px 0 rgba(78, 45, 17, 0.28),
    0 22px 34px rgba(0, 0, 0, 0.24);
}

body[data-theme="cyber"] .board-surface {
  background:
    repeating-linear-gradient(0deg, rgba(0, 220, 255, 0.06), rgba(0, 220, 255, 0.06) 1px, transparent 1px, transparent 6px),
    var(--board-surface);
  box-shadow: inset 0 0 30px rgba(0, 220, 255, 0.4), inset 0 0 60px rgba(255, 60, 200, 0.3);
}

.board-surface::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 30% 24%, rgba(255, 255, 255, 0.22), rgba(255, 255, 255, 0) 55%);
}

.grid, .intersections {
  position: absolute;
  inset: 0;
}
.grid { z-index: 1; }

.grid-line { position: absolute; background: var(--line); }
.grid-line.vertical { width: max(1px, 0.24%); }
.grid-line.horizontal { height: max(1px, 0.24%); }
.grid-line.outer { background: var(--line-outer); }
body[data-theme="cyber"] .grid-line { box-shadow: 0 0 4px var(--line); }
body[data-theme="cyber"] .grid-line.outer { box-shadow: 0 0 8px var(--line-outer); }

.star-point {
  position: absolute;
  width: 1.1%;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: var(--star);
  transform: translate(-50%, -50%);
}
body[data-theme="cyber"] .star-point { box-shadow: 0 0 8px var(--star); }

.intersections {
  z-index: 2;
  transform-style: flat;
}

.intersection {
  position: absolute;
  transform: translate(-50%, -50%);
  border: 0;
  padding: 0;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  isolation: isolate;
  overflow: visible;
  z-index: var(--stone-stack, 1);
}
.intersection.last-move { z-index: 900; }
.intersection.winning { z-index: 950; }

.intersection::before {
  content: "";
  position: absolute;
  inset: 31%;
  border-radius: 50%;
  background: rgba(55, 31, 12, 0.28);
  opacity: 0;
  transition: opacity 0.1s ease;
}
.intersection:hover::before { opacity: 1; }
.intersection.occupied { cursor: default; }
.intersection.occupied::before { display: none; }
.intersection:focus-visible { outline: 2px solid #287dff; outline-offset: 2px; }

.intersection.hint-spot::before {
  opacity: 1;
  background: var(--hint-spot);
  inset: 22%;
  animation: hintPulse 1.1s ease-in-out infinite;
}
@keyframes hintPulse {
  0%, 100% { transform: scale(1); opacity: 0.7; }
  50% { transform: scale(1.4); opacity: 1; }
}

/* ===== Stones ===== */
.stone {
  position: absolute;
  width: var(--stone-size);
  height: var(--stone-size);
  left: 50%;
  top: 50%;
  border-radius: 50%;
  pointer-events: none;
  transform: translate(-50%, -50%);
  transform-style: flat;
  filter: none;
  animation: drop 0.22s cubic-bezier(0.34, 1.7, 0.64, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  font-size: 110%;
  color: #fff;
  font-weight: 700;
  text-shadow: none;
  box-shadow: none;
}
@keyframes drop {
  0% { transform: translate(-50%, -50%) translateY(-18%) scale(1.22); opacity: 0; }
  60% { transform: translate(-50%, -50%) translateY(2%) scale(0.96); opacity: 1; }
  100% { transform: translate(-50%, -50%) translateY(0) scale(1); opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .stone { animation: none; }
}
.stone::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  top: 8%;
  left: 13%;
  width: 42%;
  height: 27%;
  background: rgba(255, 255, 255, 0.34);
  filter: blur(1px);
  transform: rotate(-18deg);
  z-index: 3;
}

/* Classic */
body[data-skin="classic"] .stone.black {
  background:
    radial-gradient(circle at 30% 22%, #8f8f8f 0%, #424242 26%, #171717 64%, #030303 100%),
    linear-gradient(180deg, #222, #050505);
}
body[data-skin="classic"] .stone.white {
  background:
    radial-gradient(circle at 28% 20%, #fff 0%, #fff 24%, #ece9df 63%, #c7c1b6 100%),
    linear-gradient(180deg, #f8f7f1, #c9c4ba);
}
body[data-skin="classic"] .stone.white::after {
  background: rgba(255, 255, 255, 0.84);
}

/* Panda */
body[data-skin="panda"] .stone.black {
  background: radial-gradient(circle at 30% 22%, #6a6a6a 0%, #242424 48%, #030303 100%);
}
body[data-skin="panda"] .stone.black::after {
  top: 28%; left: 23%; width: 54%; height: 18%;
  background:
    radial-gradient(circle at 18% 50%, #fff 0 28%, transparent 30%),
    radial-gradient(circle at 82% 50%, #fff 0 28%, transparent 30%);
  filter: none;
  transform: none;
}
body[data-skin="panda"] .stone.white {
  background: radial-gradient(circle at 30% 22%, #fff 0%, #f5f5fa 50%, #bebecb 100%);
}

/* Text/icon skins use a 3D token base so the glyph never shifts off the grid point. */
body[data-skin="cat"] .stone,
body[data-skin="emoji"] .stone,
body[data-skin="fruit"] .stone {
  background: radial-gradient(circle at 28% 20%, #fff7df 0%, #ffd98d 35%, #c77932 100%);
  font-size: clamp(0.78rem, 2.45vmin, 1.55rem);
  line-height: 1;
  text-shadow: none;
  color: #111;
}
body[data-skin="cat"] .stone.white,
body[data-skin="emoji"] .stone.white,
body[data-skin="fruit"] .stone.white {
  background: radial-gradient(circle at 28% 20%, #fff 0%, #eaf6ff 36%, #6ea1cf 100%);
}
body[data-skin="cat"] .stone::before,
body[data-skin="emoji"] .stone::before,
body[data-skin="fruit"] .stone::before {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  transform: translateY(-2%) scale(0.96);
  z-index: 2;
  filter: none;
}
body[data-skin="cat"] .stone.black::before { content: "🐱"; }
body[data-skin="cat"] .stone.white::before { content: "🐶"; }
body[data-skin="emoji"] .stone.black::before { content: "🌑"; }
body[data-skin="emoji"] .stone.white::before { content: "🌕"; }
body[data-skin="fruit"] .stone.black::before { content: "🍒"; }
body[data-skin="fruit"] .stone.white::before { content: "🍑"; }

/* Last move marker */
.intersection.last-move::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 28%;
  height: 28%;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  border: max(2px, 0.25vmin) solid var(--last-mark);
  box-shadow: none;
  z-index: 5;
  pointer-events: none;
}
body[data-skin="cat"] .intersection.last-move::after,
body[data-skin="emoji"] .intersection.last-move::after,
body[data-skin="fruit"] .intersection.last-move::after {
  left: 72%;
  top: 72%;
  width: 18%;
  height: 18%;
  background: var(--last-mark);
}

/* Winning stones glow */
.intersection.winning .stone {
  animation: winGlow 0.9s ease-in-out infinite alternate;
  outline: max(2px, 0.28vmin) solid gold;
  outline-offset: max(1px, 0.12vmin);
}
@keyframes winGlow {
  from { transform: translate(-50%, -50%) scale(1); }
  to { transform: translate(-50%, -50%) scale(1.12); }
}

/* Dialog */
.dialog {
  border: 0;
  border-radius: 14px;
  padding: 18px;
  background: var(--panel-bg);
  color: var(--text);
  max-width: 480px;
  width: 90%;
  backdrop-filter: blur(8px);
}
.dialog::backdrop { background: rgba(0,0,0,0.45); }
.dialog h3 { margin-top: 0; }
.dialog textarea { resize: vertical; min-height: 100px; }

/* Mobile */
@media (max-width: 980px) {
  body {
    padding: 0;
    overflow-x: hidden;
  }
  .app {
    width: 100%;
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .panel { max-height: none; order: 2; }
  .scene-wrap {
    width: 100vw;
    min-height: min(112vw, 620px);
    order: 1;
    margin-inline: calc(50% - 50vw);
  }
  .scene {
    width: 100vw;
    height: min(78dvh, 112vw);
    min-height: min(100vw, 560px);
    border-radius: 0;
    overflow: visible;
    perspective: none;
    box-shadow: none;
  }
  .board-3d {
    width: min(100vw, 680px);
    --board-thickness: clamp(8px, 1.8vmin, 14px);
    --stone-size: 70%;
    transform-style: flat;
  }
  .board-base {
    transform: none;
  }
  .board-base::before,
  .board-base::after {
    display: none;
  }
  .board-surface {
    transform: none;
    transform-style: flat;
    box-shadow:
      inset 0 2px 2px rgba(255,255,255,0.16),
      inset 0 -5px 14px rgba(72, 39, 14, 0.18),
      0 12px 0 rgba(78, 45, 17, 0.32),
      0 18px 24px rgba(0, 0, 0, 0.24);
  }
  .panel {
    margin: 0 10px 10px;
  }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}