:root {
  --bg: #1a1a2e;
  --bg-panel: #22223e;
  --text: #eaeaf5;
  --text-dim: #9d9dbd;
  --accent: #e0b04a;
  --accent-dim: #a9853a;
  --black-stone-1: #5a5a66;
  --black-stone-2: #0a0a0c;
  --white-stone-1: #ffffff;
  --white-stone-2: #c9c9d2;
  --wood-1: #d9a066;
  --wood-2: #c98a4b;
  --wood-3: #a8692f;
  --line: rgba(30, 18, 6, 0.62);
  --territory-black: rgba(10, 10, 12, 0.45);
  --territory-white: rgba(255, 255, 255, 0.4);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  overscroll-behavior: none;
  touch-action: manipulation;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

#app {
  height: 100dvh;
  width: 100vw;
  display: flex;
  flex-direction: column;
  position: relative;
}

.screen {
  height: 100%;
  width: 100%;
  display: flex;
  flex-direction: column;
  position: absolute;
  inset: 0;
}
.screen.hidden { display: none; }

/* ---------- Setup screen ---------- */

#setup-screen {
  align-items: center;
  justify-content: center;
  padding: 24px;
  gap: 8px;
  text-align: center;
}

.title {
  font-size: 2.6rem;
  margin: 0;
  letter-spacing: 0.04em;
  color: var(--accent);
  text-shadow: 0 2px 12px rgba(224, 176, 74, 0.35);
}

.subtitle {
  margin: 0 0 28px;
  color: var(--text-dim);
  font-size: 0.95rem;
}

.setup-block {
  width: 100%;
  max-width: 360px;
  margin-bottom: 28px;
}

.setup-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 10px;
}

.handicap-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}

.handicap-btn {
  padding: 12px 0;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: var(--bg-panel);
  color: var(--text);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

.handicap-btn.selected {
  background: var(--accent);
  border-color: var(--accent);
  color: #1a1300;
}

.opponent-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
#ai-color-block { margin-top: 8px; }
#ai-color-block.hidden { visibility: hidden; }

.opponent-btn {
  padding: 12px 6px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: var(--bg-panel);
  color: var(--text);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
}

.opponent-btn.selected {
  background: var(--accent);
  border-color: var(--accent);
  color: #1a1300;
}

.setup-hint {
  margin-top: 12px;
  font-size: 0.82rem;
  color: var(--text-dim);
  min-height: 1.2em;
}

.btn {
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  padding: 14px 28px;
}

.btn-primary {
  background: linear-gradient(180deg, #f0c463, var(--accent));
  color: #201400;
  box-shadow: 0 6px 18px rgba(224, 176, 74, 0.35);
}

.build-version {
  text-align: center;
  font-size: 0.65rem;
  color: var(--text-dim);
  opacity: 0.5;
  margin-top: 18px;
}

.btn-link {
  background: none;
  color: var(--text-dim);
  font-weight: 500;
  padding: 8px;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- Game screen ---------- */

#game-screen {
  padding: max(10px, env(safe-area-inset-top)) 10px 10px;
}

.game-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 4px 4px 10px;
  flex-shrink: 0;
}

.player-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-panel);
  border-radius: 12px;
  padding: 6px 12px;
  min-width: 0;
}

.stone-swatch {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  flex-shrink: 0;
}
.stone-black { background: radial-gradient(circle at 32% 28%, var(--black-stone-1), var(--black-stone-2) 70%); box-shadow: 0 1px 3px rgba(0,0,0,0.6); }
.stone-white { background: radial-gradient(circle at 32% 28%, var(--white-stone-1), var(--white-stone-2) 75%); box-shadow: 0 1px 3px rgba(0,0,0,0.5); }

.player-info { display: flex; flex-direction: column; line-height: 1.25; }
.player-name { font-size: 0.85rem; font-weight: 600; }
.player-caps { font-size: 0.72rem; color: var(--text-dim); }

.turn-indicator-wrap {
  flex: 1;
  min-width: 0;
}

.turn-indicator {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  text-align: center;
}

.win-prob-debug {
  min-height: 1em; /* reserved even when empty so toggling ownership never shifts the board */
  text-align: center;
  font-size: 0.7rem;
  color: var(--text-dim);
}

#board-wrap, #board-wrap-scoring {
  flex: 1;
  min-height: 0;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: box-shadow 0.15s;
  position: relative;
}

.board-banner {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(10, 10, 20, 0.85);
  color: var(--accent);
  font-size: 1.25rem;
  font-weight: 700;
  padding: 14px 28px;
  border-radius: 14px;
  border: 1px solid rgba(224, 176, 74, 0.4);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.5);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.25s;
  z-index: 5;
  text-align: center;
  white-space: nowrap;
}
.board-banner.show { opacity: 1; }

#board-wrap.illegal-flash {
  animation: flash 0.28s;
}
@keyframes flash {
  0%, 100% { filter: none; }
  40% { filter: drop-shadow(0 0 14px rgba(220, 60, 60, 0.65)); }
}

#board, #board-scoring {
  position: relative;
  border-radius: 8px;
  background:
    radial-gradient(ellipse at 28% 18%, rgba(255,255,255,0.16), transparent 55%),
    repeating-linear-gradient(90deg, rgba(255,255,255,0.025) 0 2px, transparent 2px 34px),
    linear-gradient(160deg, var(--wood-1) 0%, var(--wood-2) 32%, var(--wood-3) 68%, #8f5a26 100%);
  box-shadow:
    0 14px 34px rgba(0, 0, 0, 0.55),
    inset 0 0 46px rgba(0, 0, 0, 0.28),
    inset 0 0 2px rgba(255, 255, 255, 0.15);
  flex-shrink: 0;
}

.grid-line {
  position: absolute;
  background: var(--line);
}
.grid-line.h { height: 1.5px; }
.grid-line.v { width: 1.5px; }

.star-point {
  position: absolute;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--line);
  transform: translate(-50%, -50%);
}

.intersection {
  position: absolute;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.stone {
  border-radius: 50%;
  width: 100%;
  height: 100%;
  position: relative;
}
.stone.black {
  background: radial-gradient(circle at 33% 28%, #6b6b78 0%, #232328 45%, #020203 100%);
  box-shadow: 0 2px 4px rgba(0,0,0,0.55), 0 1px 1px rgba(255,255,255,0.08) inset;
}
.stone.white {
  background: radial-gradient(circle at 33% 28%, #ffffff 0%, #e4e4ea 55%, #b9b9c4 100%);
  box-shadow: 0 2px 4px rgba(0,0,0,0.4), 0 -2px 3px rgba(0,0,0,0.12) inset;
}

.stone .last-move-dot {
  position: absolute;
  top: 50%; left: 50%;
  width: 28%; height: 28%;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  background: var(--accent);
  opacity: 0.85;
}

.stone.dead {
  opacity: 0.35;
}
.stone.dead::before, .stone.dead::after {
  content: "";
  position: absolute;
  top: 50%; left: 8%;
  width: 84%; height: 2.5px;
  background: #e04a4a;
  transform-origin: center;
}
.stone.dead::before { transform: translateY(-50%) rotate(45deg); }
.stone.dead::after { transform: translateY(-50%) rotate(-45deg); }

.territory-mark {
  position: absolute;
  transform: translate(-50%, -50%);
  border-radius: 3px;
}
.territory-mark.black { background: var(--territory-black); }
.territory-mark.white { background: var(--territory-white); }

.ownership-mark {
  position: absolute;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 5;
  font-size: 12px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  text-shadow: -1px -1px 0 #000, 1px -1px 0 #000, -1px 1px 0 #000, 1px 1px 0 #000;
}
.ownership-mark.black { color: #3b82f6; } /* blue = black ownership */
.ownership-mark.white { color: #ec4899; } /* pink = white ownership */

.intersection.hoverable:hover .ghost-stone {
  opacity: 0.38;
}
.ghost-stone {
  border-radius: 50%;
  width: 100%;
  height: 100%;
  opacity: 0;
}
.ghost-stone.black { background: #0a0a0c; }
.ghost-stone.white { background: #f4f4f8; }

.controls {
  display: flex;
  gap: 8px;
  padding: 10px 4px 4px;
  flex-shrink: 0;
}

.btn-ctrl {
  flex: 1;
  background: var(--bg-panel);
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 13px 0;
  border-radius: 12px;
}
.btn-ctrl:disabled { opacity: 0.35; cursor: default; }

.btn-pass {
  background: linear-gradient(180deg, #35355c, #26264a);
  border-color: rgba(224,176,74,0.35);
  color: var(--accent);
}

.controls-secondary {
  display: flex;
  justify-content: center;
  gap: 18px;
  padding: 2px 0 max(4px, env(safe-area-inset-bottom));
  flex-shrink: 0;
}

/* ---------- Scoring overlay ---------- */

#scoring-screen {
  background: var(--bg);
  align-items: center;
  justify-content: flex-start;
  overflow: hidden;
}

.scoring-panel {
  width: 100%;
  height: 100%;
  max-width: 480px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  padding: max(14px, env(safe-area-inset-top)) 14px 10px;
  gap: 6px;
}

.scoring-panel h2 { margin: 0; text-align: center; color: var(--accent); }
.scoring-hint {
  margin: 0 0 4px;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.78rem;
}

.score-table {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 3px 14px;
  font-size: 0.82rem;
  background: var(--bg-panel);
  border-radius: 10px;
  padding: 10px 14px;
  flex-shrink: 0;
}
.score-table .hdr { color: var(--text-dim); font-weight: 600; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; }
.score-table .label { color: var(--text-dim); }
.score-table .val { text-align: right; font-variant-numeric: tabular-nums; }
.score-table .total-row { font-weight: 700; color: var(--accent); border-top: 1px solid rgba(255,255,255,0.12); margin-top: 2px; padding-top: 4px; }
.score-table .winner-row {
  grid-column: 1 / -1;
  text-align: center;
  font-weight: 700;
  color: var(--accent);
  margin-top: 6px;
  padding-top: 8px;
  border-top: 1px solid rgba(255,255,255,0.12);
}

.scoring-panel .controls { margin-top: auto; }