:root {
  --steel: #16120e;
  --brass: #c4a574;
  --brass-d: #8a6a3e;
  --copper: #8a4a2a;
  --cyan: #3ecfff;
  --ink: #efe6d8;
  --dim: #9a9184;
  --fail: #e07050;
  --ok: #7dcea0;
  --light: #d8b07a;
  --dark: #7a3e24;
  --sq: 52px;
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: "Source Sans 3", "Segoe UI", sans-serif;
  background: radial-gradient(1100px 640px at 50% -8%, #2a2218 0%, transparent 55%), var(--steel);
  color: var(--ink);
  overflow: hidden;
}
a { color: var(--brass); text-decoration: none; letter-spacing: 0.12em; }
button, select, input {
  font: inherit; color: var(--ink);
  background: #2a241c; border: 1px solid var(--brass-d); border-radius: 8px;
  padding: 8px 12px; cursor: pointer;
}
button:hover, select:hover { border-color: var(--brass); color: var(--brass); }
button.primary {
  background: linear-gradient(#3a3228, #2a241c);
  color: var(--brass);
  letter-spacing: 0.08em;
  font-weight: 700;
}
button.on { background: var(--brass); color: #1c1612; border-color: var(--brass); }
button:disabled { opacity: 0.4; cursor: default; }
input[type="range"] { padding: 0; accent-color: var(--brass); cursor: pointer; }
input[type="number"] { width: 5.2rem; text-align: center; }
.fen-lab { display: block; margin: 10px 0 6px; font-size: 0.78rem; color: var(--dim); }
.fen-lab input { width: 100%; font-size: 0.72rem; }
.rail-h { font-size: 0.82rem; color: var(--brass); margin: 12px 0 4px; letter-spacing: 0.08em; }
.move-list, .past-list { margin: 0; padding-left: 1.2rem; max-height: 8rem; overflow: auto; font-size: 0.78rem; color: var(--dim); }
.move-list li, .past-list li { cursor: pointer; }
.sq { touch-action: none; }
.sq.drag { opacity: 0.45; }
.elo-you { font-size: 0.82rem; color: var(--dim); }
.elo-you b { color: var(--brass); }
#file-hint {
  position: fixed; inset: 0; background: #121418; color: #efe6d8;
  place-items: center; padding: 24px; z-index: 99; text-align: center;
}
#file-hint[hidden] { display: none !important; }
#play {
  display: grid;
  grid-template-rows: auto 1fr auto;
  height: 100%;
  padding: 10px;
  gap: 8px;
}
.hud, .dock {
  display: flex; align-items: center; gap: 10px; padding: 8px 14px; flex-wrap: wrap;
  background: linear-gradient(#2a2e36, #16181c); border: 1px solid #3a3428; border-radius: 10px;
}
.brand {
  display: flex; align-items: center; gap: 8px;
  font-family: Cinzel, Palatino, serif;
  letter-spacing: 0.12em;
  color: var(--brass);
  text-decoration: none;
}
.brand img { width: 28px; height: 28px; border-radius: 6px; object-fit: cover; }
.stat { display: flex; flex-direction: column; min-width: 64px; }
.stat b { font-variant-numeric: tabular-nums; font-size: 1.05rem; color: var(--cyan); }
.stat span { font-size: 0.7rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--dim); }
#play.check-on .stat b#turn-word { color: var(--fail); }
.table {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 280px);
  gap: 10px;
  min-height: 0;
}
.board-wrap {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 0;
  overflow: auto;
  background: #0c0a08;
  border: 2px solid var(--brass-d);
  border-radius: 12px;
  box-shadow: 0 0 0 4px #0c0c0e, inset 0 0 40px #0006;
  padding: 12px;
}
#board {
  display: grid;
  grid-template-columns: repeat(10, var(--sq));
  grid-template-rows: repeat(10, var(--sq));
  width: calc(10 * var(--sq));
  height: calc(10 * var(--sq));
  flex: 0 0 auto;
  border: 8px solid #3a2c20;
  border-radius: 6px;
  box-shadow: 0 0 0 3px var(--brass), 0 16px 40px #000a;
}
.sq, .coord {
  width: var(--sq);
  height: var(--sq);
  min-width: var(--sq);
  min-height: var(--sq);
  max-width: var(--sq);
  max-height: var(--sq);
}
.sq {
  position: relative;
  padding: 0;
  border: none;
  border-radius: 0;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}
.sq.light {
  background: linear-gradient(145deg, #e4c090, var(--light) 55%, #c49860);
}
.sq.dark {
  background: linear-gradient(145deg, #9a4e2c, var(--dark) 55%, #5a2a18);
}
.sq.sel { box-shadow: inset 0 0 0 4px var(--cyan); }
.sq.last { box-shadow: inset 0 0 0 3px #e8c040aa; }
.sq.sel.last { box-shadow: inset 0 0 0 4px var(--cyan); }
.sq.check { box-shadow: inset 0 0 0 4px var(--fail); }
.sq svg {
  width: 86%;
  height: 86%;
  display: block;
  margin: 7% auto;
  pointer-events: none;
  filter: drop-shadow(0 3px 2px #0006);
}
.sq .mark {
  position: absolute;
  inset: 34%;
  border-radius: 50%;
  pointer-events: none;
  display: none;
}
.sq.legal .mark {
  display: block;
  background: #1c161280;
}
.sq.cap .mark {
  display: block;
  inset: 7%;
  background: transparent;
  border: 5px solid #e0705088;
}
.coord {
  display: grid;
  place-items: center;
  color: var(--brass);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  background: #241c14;
  pointer-events: none;
  user-select: none;
  text-transform: lowercase;
}
.coord.rank { letter-spacing: 0; }
.coord.corner {
  background: #1a1410;
}
.rail {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 0;
  overflow: auto;
  background: linear-gradient(#2a241c, #16141a);
  border: 1px solid var(--brass-d);
  border-radius: 12px;
  padding: 12px;
}
.rail h2 {
  font-family: Cinzel, Palatino, serif;
  color: var(--brass);
  margin: 0 0 4px;
  font-size: 1.05rem;
}
.rail p { color: var(--dim); font-size: 0.88rem; line-height: 1.4; margin: 0 0 8px; }
.modes { display: flex; flex-wrap: wrap; gap: 6px; position: static; }
#pause-modal .panel { display: flex; flex-direction: column; align-items: stretch; gap: 12px; }
#pause-modal .modes, #pause-modal .row { position: static; width: 100%; }
#pause-modal #btn-resume { margin-top: 4px; }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
#status {
  min-height: 2.6em;
  color: var(--ink);
  background: #1c1812;
  border: 1px solid #3a3428;
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 0.95rem;
}
.engine-note {
  font-size: 0.82rem;
  color: var(--dim);
  margin: 0 0 10px;
  line-height: 1.4;
}
.elo-lab {
  display: grid;
  gap: 6px;
  color: var(--dim);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 10px 0 14px;
}
.elo-lab .row { text-transform: none; letter-spacing: 0; }
.plates {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 12px 0 4px;
}
.plates button {
  min-height: 64px;
  text-align: left;
  letter-spacing: 0.04em;
}
.plates button b {
  display: block;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
  font-size: 1.15rem;
}
.modal {
  position: fixed; inset: 0; display: grid; place-items: center; background: #121418cc;
  z-index: 20; padding: 16px;
}
.modal[hidden] { display: none !important; }
.panel {
  background: linear-gradient(#2a241c, #16141a);
  border: 1px solid var(--brass);
  border-radius: 12px;
  padding: 22px 24px;
  min-width: min(380px, 92vw);
  max-width: 520px;
  box-shadow: 0 20px 50px #000a;
}
.panel h2 { font-family: Cinzel, Palatino, serif; margin: 0 0 8px; color: var(--brass); }
.panel p { margin: 8px 0; color: var(--dim); }
.promo-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 12px; }
.promo-row button { min-height: 64px; font-size: 1.05rem; }
.hint { font-size: 0.78rem; opacity: 0.8; }
.hof-win input {
  display: block;
  margin-top: 4px;
  width: min(16rem, 100%);
}
a.rules-btn {
  display: inline-flex;
  align-items: center;
  background: #2a2218;
  color: var(--ink) !important;
  padding: 6px 14px;
  border: 1px solid var(--brass-d);
  border-radius: 8px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
}
a.rules-btn:hover { border-color: var(--brass); color: var(--brass) !important; }
@media (max-width: 820px) {
  .table { grid-template-columns: 1fr; grid-template-rows: minmax(0, 1fr) auto; }
  .rail { max-height: 28vh; }
  .hud a.rules-btn { letter-spacing: 0.02em; padding: 6px 10px; }
}