:root {
  --bg: #16161a;
  --surface: #222229;
  --board-surface: #1c1c22;
  --border: #2e2e38;
  --accent: #f0a050;
  --accent2: #e07090;
  --warn: #f87171;
  --text: #e8e6e3;
  --text-dim: #8b8b97;
  --mono: 'JetBrains Mono', monospace;
  --display: 'Inter', system-ui, sans-serif;
  --body: 'Inter', system-ui, sans-serif;

  /* Board square colors — warm wood-inspired but dark-mode friendly */
  --sq-light: #b8c4b8;
  --sq-dark: #5a6e5a;
  --sq-light-last: #c4d4a0;
  --sq-dark-last: #7a9a50;
  --sq-check: rgba(220, 50, 50, 0.6);
  --sq-selected: rgba(240, 160, 80, 0.35);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  min-height: 100vh;
  font-family: var(--body);
  color: var(--text);
  background: var(--bg);
}

.back-link {
  position: fixed; top: 20px; left: 24px;
  font-family: var(--mono); font-size: 12px; color: var(--text-dim);
  text-decoration: none; letter-spacing: 0.14em; text-transform: uppercase;
}
.back-link:hover { color: var(--accent); }

.shell {
  max-width: 1040px; margin: 0 auto;
  padding: 90px 24px 48px; position: relative; z-index: 1;
}
.kicker {
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.24em; color: var(--accent); text-transform: uppercase;
}
.title {
  font-family: var(--display);
  font-size: clamp(44px, 9vw, 82px);
  font-weight: 800;
  margin-top: 10px; line-height: 0.95;
}
.title span {
  display: block;
  color: var(--accent);
}
.subtitle { margin-top: 14px; color: var(--text-dim); }

.panel {
  margin-top: 24px;
  background: rgba(34, 34, 41, 0.90);
  border: 1px solid var(--border);
  border-radius: 18px; padding: 22px;
  backdrop-filter: blur(8px);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
}

.setup-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}
.control { display: grid; gap: 6px; }
.control span {
  font-family: var(--mono); font-size: 11px;
  color: var(--text-dim); letter-spacing: 0.1em; text-transform: uppercase;
}
.control select {
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--surface); color: var(--text); padding: 10px;
  font-family: var(--mono);
}

/* HUD */
.hud {
  display: grid;
  grid-template-columns: repeat(3, max-content);
  gap: 10px;
  width: min(95vw, 760px); margin: 0 auto 14px;
  justify-content: center; align-items: center;
}
.hud-item {
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-dim);
  border: 1px solid var(--border); border-radius: 999px;
  height: 44px; padding: 0 18px;
  background: rgba(34, 34, 41, 0.9);
  display: inline-grid; place-items: center;
  white-space: nowrap;
}
#statusText { color: var(--accent2); }
.btn-hud {
  grid-column: 1 / -1;
  height: 44px; padding: 0 14px;
  font-size: 11px; display: inline-grid; place-items: center;
}

/* Clocks */
.clocks {
  display: grid; width: min(90vw, 560px);
  grid-template-columns: repeat(2, 1fr);
  gap: 10px; margin: 0 auto 12px;
}
.clock-chip {
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--surface); padding: 10px;
  font-family: var(--mono); font-size: 14px;
  letter-spacing: 0.05em; color: var(--text-dim);
  text-transform: uppercase; text-align: center;
}
.clock-chip.active { border-color: rgba(240, 160, 80, 0.45); color: var(--accent); }
.clock-chip.warn { border-color: rgba(248, 113, 113, 0.55); color: var(--warn); }

/* Board */
.board-wrap { display: flex; justify-content: center; }
.board {
  width: min(90vw, 560px); height: min(90vw, 560px);
  border: 2px solid rgba(255,255,255,0.08);
  border-radius: 6px; overflow: hidden;
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  grid-template-rows: repeat(8, 1fr);
  box-shadow:
    0 0 0 1px rgba(0,0,0,0.5),
    0 8px 32px rgba(0,0,0,0.5),
    inset 0 0 60px rgba(0,0,0,0.1);
}

/* Squares */
.sq {
  border: 0; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  user-select: none; position: relative; padding: 2px;
  transition: background 0.08s ease;
}
.sq.light { background: var(--sq-light); }
.sq.dark { background: var(--sq-dark); }

.sq.selected.light { background: #d4b882; }
.sq.selected.dark { background: #9a7a4a; }

.sq.last-move.light { background: var(--sq-light-last); }
.sq.last-move.dark { background: var(--sq-dark-last); }

.sq.in-check { background: var(--sq-check) !important; }

/* Pieces */
.piece-img {
  width: 82%; height: 82%;
  pointer-events: none;
  filter: drop-shadow(0 2px 3px rgba(0,0,0,0.4));
  transition: transform 0.08s ease;
}
.sq:hover .piece-img { transform: scale(1.06); }

/* Legal move dot */
.sq.legal::after {
  content: "";
  width: 26%; height: 26%;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.22);
  position: absolute; pointer-events: none;
}

/* Legal capture ring */
.sq.legal-capture::after {
  content: "";
  position: absolute; inset: 4%;
  border-radius: 50%;
  border: 3px solid rgba(0, 0, 0, 0.25);
  pointer-events: none;
}

/* Drag ghost */
.drag-ghost {
  position: fixed; pointer-events: none; z-index: 9999;
  filter: drop-shadow(0 6px 20px rgba(0,0,0,0.6));
  opacity: 0.92;
}

/* Promotion dialog */
.promo-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 10000; display: grid; place-items: center;
  backdrop-filter: blur(4px);
}
.promo-dialog {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px; padding: 24px 28px;
  text-align: center;
  box-shadow: 0 16px 48px rgba(0,0,0,0.5);
}
.promo-title {
  font-family: var(--mono); font-size: 13px;
  color: var(--text-dim); letter-spacing: 0.1em;
  text-transform: uppercase; margin-bottom: 16px;
}
.promo-row { display: flex; gap: 10px; justify-content: center; }
.promo-btn {
  width: 68px; height: 68px;
  background: var(--surface);
  border: 1px solid var(--border); border-radius: 12px;
  cursor: pointer; display: grid; place-items: center;
  transition: border-color 0.12s, background 0.12s;
}
.promo-btn:hover {
  border-color: var(--accent);
  background: rgba(240, 160, 80, 0.08);
}
.promo-img { width: 50px; height: 50px; pointer-events: none; }

/* Meta section */
.meta-row { display: flex; gap: 12px; flex-wrap: wrap; }
.moves-box, .captures-box {
  margin-top: 14px;
  border: 1px solid var(--border); border-radius: 12px;
  background: var(--surface); padding: 12px;
  flex: 1; min-width: 280px;
}
.captures-title-gap { margin-top: 12px; }
.captured-row {
  margin-top: 8px; min-height: 34px;
  border: 1px solid rgba(46, 46, 56, 0.6); border-radius: 8px;
  background: rgba(22, 22, 26, 0.8);
  display: flex; align-items: center; gap: 4px; padding: 6px 8px;
  font-size: 22px;
}
.captured-empty {
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-dim);
}
.moves-title {
  font-family: var(--mono); color: var(--text-dim);
  font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
}
.moves-list {
  margin-top: 8px; max-height: 180px; overflow: auto; padding-left: 22px;
}
.moves-list li {
  font-family: var(--mono); font-size: 12px;
  color: #a8a8b4; line-height: 1.6;
}

/* Actions */
.actions {
  margin-top: 14px; display: flex; gap: 10px; flex-wrap: wrap;
}
.btn {
  border: 1px solid var(--border); border-radius: 10px;
  padding: 11px 14px;
  font-family: var(--mono); font-size: 12px;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: #fff; background: var(--surface); cursor: pointer;
  transition: border-color 0.12s, color 0.12s;
}
.btn-primary:hover { border-color: rgba(240, 160, 80, 0.45); color: var(--accent); }
.btn-secondary:hover { border-color: rgba(224, 112, 144, 0.45); color: var(--accent2); }
.btn.btn-hud { height: 44px; min-height: 44px; padding: 0 14px; }

.hidden { display: none; }

@media (max-width: 850px) {
  .setup-grid { grid-template-columns: 1fr; }
  .clocks { grid-template-columns: 1fr; }
  .hud { grid-template-columns: 1fr; width: min(94vw, 420px); }
  .hud-item, .btn-hud { width: 100%; }
}