:root {
  --bg: #12141a;
  --bg-2: #191c25;
  --panel: #20242f;
  --panel-2: #262b38;
  --ink: #eceef3;
  --muted: #8f95a6;
  --accent: #7dbf63;
  --danger: #d3705c;
  --sq-light: #f0d9b5;
  --sq-dark: #b58863;
  --radius: 14px;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0;
  height: 100%;
  overscroll-behavior: none;
}

body {
  background: radial-gradient(120% 90% at 50% 0%, #1c2030 0%, var(--bg) 60%);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  max-width: 620px;
  margin: 0 auto;
  padding: max(10px, env(safe-area-inset-top)) 12px max(10px, env(safe-area-inset-bottom));
  gap: 8px;
}

/* ---------- HUD ---------- */
#hud {
  flex: 0 0 auto;
  padding: 2px 4px 0;
  min-height: 46px;
}

#statusLine {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 650;
  letter-spacing: .1px;
}

#turnDot {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  flex: 0 0 auto;
  background: #fff;
  border: 1.5px solid #6b6f7d;
  box-shadow: 0 0 0 3px rgba(255,255,255,.06);
}
#turnDot.b { background: #1b1d24; border-color: #7b8194; }

#subText {
  margin-top: 3px;
  font-size: 12.5px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding-left: 23px;
}
#hud.over #statusLine { color: var(--accent); }
#hud.lost #statusLine { color: var(--danger); }
#hud.check #statusLine { color: #f0b45f; }

/* ---------- Table / players ---------- */
#table {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.player {
  flex: 0 0 auto;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 0 6px;
  border-radius: 9px;
  border: 1px solid transparent;
  color: var(--muted);
  font-size: 13px;
  transition: background .18s ease, color .18s ease, border-color .18s ease;
}
.player.active {
  background: rgba(125,191,99,.10);
  border-color: rgba(125,191,99,.22);
  color: var(--ink);
}
.player .who { display: flex; align-items: center; gap: 7px; font-weight: 600; }
.player .dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: #fff; border: 1px solid #5f6473;
}
.player.black .dot { background: #1b1d24; border-color: #5f6473; }
.player.active .dot { box-shadow: 0 0 0 3px rgba(125,191,99,.22); }

.taken {
  display: flex;
  align-items: center;
  gap: 1px;
  font-size: 15px;
  line-height: 1;
  color: #c8ccd8;
  overflow: hidden;
  white-space: nowrap;
}
.taken .t { line-height: 1; }
.taken .t.w { color: #f3f1ea; }
.taken .t.b { color: #9aa0b0; }
.taken .adv { margin-left: 4px; font-size: 11.5px; color: var(--muted); font-variant-numeric: tabular-nums; }

/* ---------- Board ---------- */
#boardWrap {
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

#board {
  --sq: 40px;
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  grid-template-rows: repeat(8, 1fr);
  width: 100%;
  aspect-ratio: 1 / 1;
  max-width: 100%;
  max-height: 100%;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0,0,0,.45), 0 0 0 1px rgba(255,255,255,.05);
  touch-action: manipulation;
}

.sq {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.sq.light { background: var(--sq-light); }
.sq.dark { background: var(--sq-dark); }

.pc {
  position: relative;
  z-index: 2;
  font-family: "Noto Sans Symbols 2", "Segoe UI Symbol", "DejaVu Sans", sans-serif;
  font-size: calc(var(--sq) * 0.79);
  line-height: 1;
  pointer-events: none;
  transform: translateY(-2%);
}
.pc.w {
  color: #fdfdfb;
  -webkit-text-stroke: calc(var(--sq) * 0.028) #2f3138;
  text-shadow: 0 2px 2px rgba(0,0,0,.30);
}
.pc.b {
  color: #191b21;
  -webkit-text-stroke: calc(var(--sq) * 0.022) #0c0d10;
  text-shadow: 0 2px 2px rgba(0,0,0,.22);
}

/* Highlights */
.sq.last::before,
.sq.sel::before,
.sq.check::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
}
.sq.last::before { background: rgba(250,224,105,.42); }
.sq.check::before {
  background: radial-gradient(circle at 50% 50%, rgba(240,60,50,.78) 0%, rgba(240,60,50,.30) 55%, rgba(240,60,50,0) 78%);
}
.sq.sel::before { background: rgba(88,170,80,.45); }

.sq.dot::after {
  content: "";
  width: 30%;
  height: 30%;
  border-radius: 50%;
  background: rgba(24,26,20,.30);
  z-index: 1;
}
.sq.cap::after {
  content: "";
  position: absolute;
  inset: 4%;
  border-radius: 50%;
  border: calc(var(--sq) * 0.075) solid rgba(24,26,20,.30);
  z-index: 1;
}

/* ---------- Promotion ---------- */
.promo {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10,11,16,.62);
  backdrop-filter: blur(3px);
  border-radius: 10px;
  animation: fade .14s ease;
}
.promo[hidden] { display: none; }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
.promo-card {
  background: var(--panel);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 18px;
  padding: 16px;
  width: min(88%, 320px);
  box-shadow: 0 18px 50px rgba(0,0,0,.6);
  text-align: center;
}
.promo-title { font-size: 13px; color: var(--muted); margin-bottom: 10px; letter-spacing: .3px; }
.promo-options { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.promo-btn {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  line-height: 1;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.09);
  background: var(--panel-2);
  color: #f4f4f1;
  font-family: "Noto Sans Symbols 2", "Segoe UI Symbol", "DejaVu Sans", sans-serif;
}
.promo-btn:active { background: #333a4b; transform: scale(.96); }
.promo-cancel {
  margin-top: 12px;
  width: 100%;
  padding: 10px;
  border-radius: 10px;
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 13px;
}

/* ---------- Moves ---------- */
#movesPanel {
  flex: 0 1 auto;
  max-height: 19dvh;
  overflow-y: auto;
  background: rgba(255,255,255,.035);
  border: 1px solid rgba(255,255,255,.05);
  border-radius: 12px;
  padding: 4px 6px;
  scrollbar-width: none;
}
#movesPanel::-webkit-scrollbar { display: none; }

#moveList {
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: ui-monospace, "SF Mono", "Roboto Mono", monospace;
  font-size: 13px;
}

.mv-row {
  display: grid;
  grid-template-columns: 2.6em 1fr 1fr;
  gap: 4px;
  padding: 3px 6px;
  border-radius: 6px;
}
.mv-row:nth-child(odd) { background: rgba(255,255,255,.025); }
.mv-row .num { color: #6f7688; font-size: 11.5px; align-self: center; }
.mv-row .san { color: #d7dae3; padding: 1px 4px; }
.mv-row .san.b { color: #aeb4c4; }
.mv-row.current .san:not(:empty) { color: #fff; font-weight: 700; }
.mv-row.current { background: rgba(125,191,99,.13); }

/* ---------- Controls ---------- */
#controls {
  flex: 0 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 7px;
}

.btn {
  height: 47px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.07);
  background: var(--panel);
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  font-family: inherit;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 0 4px;
  transition: transform .08s ease, background .15s ease, opacity .15s ease;
}
.btn:active { transform: scale(.96); background: var(--panel-2); }
.btn:disabled { opacity: .38; }
.btn.danger { color: #e8a698; }
.btn.on { border-color: rgba(125,191,99,.45); background: rgba(125,191,99,.14); color: #c6e9b6; }

@media (max-height: 520px) {
  #movesPanel { display: none; }
  #subText { display: none; }
  #app { gap: 5px; }
}

@media (max-height: 640px) {
  #hud { min-height: 38px; }
  #statusLine { font-size: 16px; }
  #movesPanel { max-height: 15dvh; }
  .btn { height: 42px; font-size: 12px; }
  .player { height: 26px; }
}