:root {
  --bg: #f4efe6;
  --fg: #2b2622;
  --muted: #7a7068;
  --card: #fffaf2;
  --border: #e2d7c6;
  --accent: #b5452f;
  --accent-fg: #fff;
  --wood: #e3bb7a;
  --wood-edge: #c99a55;
  --grid: #5b4127;
  --shadow: 0 10px 30px rgba(60, 40, 20, 0.18);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1b1916;
    --fg: #ece5da;
    --muted: #a39888;
    --card: #26231f;
    --border: #3a342d;
    --accent: #e0664b;
    --accent-fg: #1b1916;
    --wood: #d2a660;
    --wood-edge: #a77c3c;
    --grid: #4a331c;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

html, body { margin: 0; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  min-height: 100vh;
  display: flex;
  justify-content: center;
}

.app {
  width: 100%;
  max-width: 640px;
  padding: 20px 16px 28px;
  display: grid;
  gap: 20px;
  align-items: start;
}
.game { display: flex; flex-direction: column; gap: 14px; min-width: 0; }

@media (min-width: 1040px) {
  .app { max-width: 1080px; grid-template-columns: minmax(0, 640px) minmax(0, 1fr); }
  .panel { position: sticky; top: 20px; max-height: calc(100vh - 40px); overflow-y: auto; }
}

.top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

h1 {
  margin: 0;
  font-size: 1.5rem;
  letter-spacing: 0.02em;
}
h1 .vs { color: var(--muted); font-weight: 400; font-size: 1rem; margin: 0 2px; }
#engine-name { color: var(--accent); }

.scores { display: flex; gap: 14px; color: var(--muted); font-size: 0.9rem; }
.scores b { color: var(--fg); font-variant-numeric: tabular-nums; }

.status {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 10px 14px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 1rem;
}
#status-text { flex: 1; }
.status.win { border-color: #3f9a5a; }
.status.loss { border-color: var(--accent); }

.stone-dot {
  width: 18px; height: 18px; border-radius: 50%; flex: none;
  box-shadow: 0 1px 2px rgba(0,0,0,.35);
}
.stone-dot.black { background: radial-gradient(circle at 35% 30%, #666, #111 60%); }
.stone-dot.white { background: radial-gradient(circle at 35% 30%, #fff, #d8d8d8 70%); border: 1px solid #bbb; }

.badge {
  font-size: 0.75rem;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--muted);
  white-space: nowrap;
}
.badge.jev { color: var(--accent); border-color: var(--accent); }
.badge.fallback { color: #b07a12; border-color: #b07a12; }

.thinking { display: inline-flex; gap: 4px; }
.thinking[hidden], .badge[hidden] { display: none; }
.thinking i {
  width: 6px; height: 6px; border-radius: 50%; background: var(--muted);
  animation: blink 1s infinite ease-in-out;
}
.thinking i:nth-child(2) { animation-delay: .15s; }
.thinking i:nth-child(3) { animation-delay: .3s; }
@keyframes blink { 0%, 80%, 100% { opacity: .2; } 40% { opacity: 1; } }

.board-wrap {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 10px;
  box-shadow: var(--shadow);
  background: var(--wood);
  border: 3px solid var(--wood-edge);
  overflow: hidden;
  touch-action: manipulation;
}
#board { width: 100%; height: 100%; display: block; cursor: pointer; }
#board.busy { cursor: wait; }
#board.over { cursor: default; }

.controls {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}
.controls .select { display: flex; align-items: center; gap: 6px; margin-right: auto; color: var(--muted); }

button, select {
  font: inherit;
  color: var(--fg);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 9px 16px;
  min-height: 42px;
  cursor: pointer;
}
button:hover:not(:disabled), select:hover { border-color: var(--muted); }
button:disabled { opacity: .45; cursor: not-allowed; }
button.primary { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }
button.primary:hover:not(:disabled) { filter: brightness(1.07); border-color: var(--accent); }

.foot {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.8rem;
}

/* ---- Jev panel ---- */
.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px 16px;
  min-width: 0;
}
.panel-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; }
.panel h2 { margin: 0; font-size: 1.1rem; }
.toggle { font-size: 0.85rem; color: var(--muted); display: flex; align-items: center; gap: 6px; cursor: pointer; }
.meta { margin: 6px 0 12px; color: var(--muted); font-size: 0.8rem; }
.empty { color: var(--muted); font-size: 0.9rem; margin: 0; }
.error { color: var(--accent); font-size: 0.9rem; }

.q { border-top: 1px solid var(--border); padding: 12px 0 4px; }
.q:first-child { border-top: 0; padding-top: 0; }
.q-title { display: flex; align-items: baseline; gap: 8px; margin: 0 0 6px; font-size: 0.95rem; }
.q-type {
  font: 0.7rem ui-monospace, SFMono-Regular, Menlo, monospace;
  padding: 1px 6px; border-radius: 6px; background: var(--bg); border: 1px solid var(--border); color: var(--muted);
}
.q-ask { margin: 0 0 8px; color: var(--muted); font-size: 0.8rem; line-height: 1.45; }
.q-ask b { color: var(--fg); font-weight: 500; }
.answer { margin: 0 0 8px; font-size: 0.95rem; }
.answer strong { font-size: 1.25rem; color: var(--accent); }
.note { font-size: 0.8rem; color: #b07a12; margin: 0 0 8px; }

.bars { display: flex; flex-direction: column; gap: 5px; margin: 0; padding: 0; list-style: none; }
.bar { display: grid; grid-template-columns: 3.4em 1fr 3.2em; gap: 8px; align-items: center; font-size: 0.8rem; }
.bar .lbl { font-variant-numeric: tabular-nums; font-weight: 600; }
.bar .lbl.wide { font-weight: 400; }
.bar .track { position: relative; height: 16px; border-radius: 4px; background: var(--bg); overflow: hidden; }
.bar .fill { position: absolute; inset: 0 auto 0 0; background: color-mix(in srgb, var(--accent) 55%, transparent); border-radius: 4px; }
.bar.chosen .fill { background: var(--accent); }
.bar .pct { text-align: right; font-variant-numeric: tabular-nums; color: var(--muted); }
.bar .desc { grid-column: 2 / 4; color: var(--muted); font-size: 0.72rem; margin-top: -2px; }
.bars.levels .bar { grid-template-columns: 7.5em 1fr 3.2em; }
.more { font-size: 0.75rem; color: var(--muted); margin: 6px 0 0; }

#jev-raw-wrap { margin-top: 12px; font-size: 0.8rem; }
#jev-raw-wrap summary { cursor: pointer; color: var(--muted); }
#jev-raw {
  max-height: 360px; overflow: auto; background: var(--bg); border: 1px solid var(--border);
  border-radius: 8px; padding: 10px; font-size: 0.72rem; line-height: 1.4; white-space: pre;
}

.block-head { margin: 14px 0 6px; padding-top: 12px; border-top: 2px solid var(--border); }
.block-head:first-child { margin-top: 0; padding-top: 0; border-top: 0; }
.block-head h3 { margin: 0; font-size: 1rem; }
.block-head p, .block-sub { margin: 4px 0 0; color: var(--muted); font-size: 0.8rem; }
.threats {
  margin: 6px 0 10px; padding: 8px 10px; border-radius: 8px;
  background: var(--bg); border: 1px solid var(--border); font-size: 0.8rem; line-height: 1.5;
}
.threats p { margin: 0; }
.threats p + p { margin-top: 4px; }