.play {
  display: grid;
  grid-template-columns: minmax(280px, 440px) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
  padding-top: 8px;
}

.board-col { position: sticky; top: 12px; }

.board-frame {
  background: #e8b866;
  border: 1px solid #c99a4a;
  border-radius: 6px;
  padding: 8px;
}

#board { display: block; width: 100%; height: auto; }

.step-info {
  margin: 12px 0 8px;
  color: var(--cinnabar-deep);
  font-family: "Noto Serif CJK SC", "Source Han Serif SC", "Songti SC", serif;
  font-size: 18px;
}

.play-btns { display: flex; flex-wrap: wrap; gap: 8px; }

.play-btns button {
  padding: 7px 12px;
  color: var(--ink);
  font: inherit;
  font-size: 14px;
  background: transparent;
  border: 1px solid #c9b496;
  border-radius: 4px;
  cursor: pointer;
}

.play-btns button:hover { border-color: var(--cinnabar); color: var(--cinnabar-deep); }

.path {
  margin-top: 12px;
  color: var(--ink-soft);
  font-family: "Noto Serif CJK SC", "Source Han Serif SC", "Songti SC", serif;
  font-size: 16px;
  line-height: 1.8;
}

.path-step { white-space: nowrap; }
.path-step i {
  font-style: normal;
  margin-right: 4px;
  padding: 0 5px;
  border-radius: 3px;
  font-family: "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  font-size: 12px;
  line-height: 1.6;
}
.path-step.red i { color: #fff; background: var(--cinnabar); }
.path-step.black i { color: var(--paper); background: var(--ink); }
.path-step.red b { color: var(--cinnabar-deep); }
.path-step.black b { color: var(--ink); }
.path-arrow { margin: 0 5px; color: var(--gold); }

.ply {
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.ply-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: .12em;
}

.who {
  padding: 0 6px;
  border-radius: 3px;
  font-size: 12px;
  letter-spacing: .08em;
  line-height: 1.6;
}
.who.red { color: #fff; background: var(--cinnabar); }
.who.black { color: var(--paper); background: var(--ink); }

.fork {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
  margin-bottom: 6px;
  padding: 7px 10px;
  text-align: left;
  color: inherit;
  font: inherit;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 6px;
  cursor: pointer;
}

.fork b {
  font-family: "Noto Serif CJK SC", "Source Han Serif SC", "Songti SC", serif;
  font-weight: 700;
}

.fork .meta { color: var(--muted); font-size: 12.5px; white-space: nowrap; }

.fork.dim {
  color: #b5a690;
  border-color: #eadfcd;
}
.fork.dim b { color: #b5a690; font-weight: 500; }
.fork.dim .meta { color: #c9baa6; }

.fork.on.red {
  border-color: var(--cinnabar);
  background: rgba(180, 51, 42, .1);
  box-shadow: inset 3px 0 0 var(--cinnabar);
}
.fork.on.black {
  border-color: var(--ink);
  background: rgba(34, 25, 16, .06);
  box-shadow: inset 3px 0 0 var(--ink);
}

.fork.here { outline: 2px solid var(--gold); outline-offset: 1px; }

.open-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.open-links a {
  text-decoration: none;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink-soft);
  font-size: 14px;
}

.open-links a[aria-current="page"] {
  color: var(--cinnabar-deep);
  border-color: var(--cinnabar);
  font-weight: 600;
}

.wait {
  margin: 8px 0 16px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 800px) {
  .play { grid-template-columns: 1fr; }
  .board-col { position: static; }
}