/* ═══════════════════════════════════════════════════════════════════════
   Playable engine demo. Loaded only on the extinction chess page.
   Uses the site tokens from style.css so it reads as part of the page.
   ═════════════════════════════════════════════════════════════════════ */

.play {
  /* Break out of the 720px prose column to the site's 1140px container.
     margin-left:50% puts the left edge at the prose column's midpoint, then
     translateX(-50%) recentres on the viewport — so it lines up with the page
     container regardless of how narrow the surrounding text is. */
  width: min(1140px, calc(100vw - 2 * var(--space)));
  margin: 2.5rem 0 3rem 50%;
  transform: translateX(-50%);
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

/* ─── Control bar ─── */
.play__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: 0.75rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.25rem;
}
.play__bar .btn { padding: 0.6rem 1.2rem; font-size: var(--step--1); }

.play__field { display: flex; flex-direction: column; gap: 0.3rem; }
.play__field > span {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.play__field select {
  padding: 0.55rem 0.7rem;
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  font: inherit;
  font-size: var(--step--1);
  cursor: pointer;
}
.play__field select:disabled { opacity: 0.5; cursor: not-allowed; }

/* ─── Layout ─── */
/* board | game panel | analysis */
.play__main {
  display: grid;
  grid-template-columns: minmax(300px, 1.15fr) 232px minmax(260px, 1fr);
  gap: 1.5rem;
  align-items: start;
}
.play__boardwrap { position: relative; }

.play__analysis {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  min-width: 0;
}
.panel__h {
  margin: 0;
  font-size: var(--step--1);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-faint);
}

/* ─── Board ─── */
.board {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  /* Rows must be explicit. Without this they're auto-sized, so ranks holding
     pieces grow to fit the glyph while empty ranks collapse — the board stops
     being square. */
  grid-template-rows: repeat(8, 1fr);
  aspect-ratio: 1;
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  user-select: none;
  touch-action: manipulation;
}

.sq {
  position: relative;
  display: grid;
  place-items: center;
  border: 0;
  padding: 0;
  background: var(--board-light);
  cursor: default;
  font-size: clamp(22px, 5.2vw, 40px);
  line-height: 1;
}
.sq--dark { background: var(--board-dark); }
.sq--playable { cursor: pointer; }
.sq--sel { box-shadow: inset 0 0 0 3px var(--accent-2); }
.sq--last { background-image: linear-gradient(var(--accent-1), var(--accent-1)); background-blend-mode: soft-light; }

/* Move hints: dot for a quiet move, ring for a capture */
.sq--to::after {
  content: '';
  position: absolute;
  width: 30%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--accent-2);
  opacity: 0.55;
  pointer-events: none;
}
.sq--to.sq--cap::after {
  width: 84%;
  background: transparent;
  border: 4px solid var(--accent-3);
  opacity: 0.8;
}

/* Pieces use the SOLID glyph set for BOTH colours and get their colour from
   CSS. The outline glyphs (♙♘…) render inconsistently across platforms and
   some fonts turn them into emoji; the filled ones are reliable. */
.pc {
  font-family: 'Segoe UI Symbol', 'Apple Symbols', 'Noto Sans Symbols 2', serif;
  pointer-events: none;
}
.pc--w { color: #fff; text-shadow: 0 0 1px #000, 0 0 2px #000, 0 1px 2px rgba(0,0,0,.5); }
.pc--b { color: #14141c; text-shadow: 0 0 1px rgba(255,255,255,.35); }

/* ─── Promotion picker ─── */
.promo {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  gap: 0.8rem;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(3px);
  border-radius: 10px;
  z-index: 5;
}
.promo p { margin: 0; text-align: center; font-weight: 600; }
.promo__opts { display: flex; gap: 0.5rem; flex-wrap: wrap; justify-content: center; }
.promo__opts button {
  width: 52px;
  height: 52px;
  font-size: 30px;
  line-height: 1;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  color: var(--text);
  font-family: 'Segoe UI Symbol', 'Apple Symbols', 'Noto Sans Symbols 2', serif;
}
.promo__opts button:hover { border-color: var(--accent-2); }

/* ─── Side panel ─── */
.play__side { display: flex; flex-direction: column; gap: 1rem; }

.clocks { display: flex; flex-direction: column; gap: 0.4rem; }
.clock {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.6rem 0.8rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.clock--active { border-color: var(--accent-2); }
.clock--low .clock__t { color: var(--accent-3); }
.clock__who { font-size: var(--step--1); color: var(--text-muted); }
.clock__t {
  font-family: 'Cascadia Code', Consolas, 'SF Mono', monospace;
  font-size: 1.05rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.status {
  padding: 0.7rem 0.85rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: var(--step--1);
  color: var(--text-muted);
  min-height: 3.2em;
}
.status--win { border-color: #22c55e; color: var(--text); }
.status--lose { border-color: var(--accent-3); color: var(--text); }

/* ─── Extinction tracker ─── */
.tracker h4 {
  margin: 0 0 0.2rem;
  font-size: var(--step--1);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.tracker__hint {
  margin: 0 0 0.6rem;
  font-size: 0.75rem;
  color: var(--text-faint);
}
.tracker__grid {
  display: grid;
  grid-template-columns: auto repeat(6, 1fr);
  gap: 0.25rem;
  font-size: 0.78rem;
  text-align: center;
}
.tracker__lbl { color: var(--text-faint); text-align: left; align-self: center; }
.tracker__hd { color: var(--text-faint); font-family: 'Segoe UI Symbol', serif; }
.tracker__c {
  padding: 0.25rem 0;
  border-radius: 5px;
  background: var(--surface-2);
  font-variant-numeric: tabular-nums;
}
/* One left = one capture from losing */
.tracker__c--danger {
  background: color-mix(in srgb, var(--accent-3) 30%, var(--surface-2));
  color: var(--text);
  font-weight: 700;
}
.tracker__c--gone {
  background: var(--accent-3);
  color: #fff;
  font-weight: 700;
}

/* ─── Analysis ─── */
.analysis__body {
  padding: 0.85rem;
  font-size: 0.78rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-2);
}
.analysis__empty { color: var(--text-faint); margin: 0; }
.analysis__row {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.2rem 0;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}
.evalbar {
  height: 6px;
  border-radius: 3px;
  background: var(--border);
  overflow: hidden;
  margin: 0.4rem 0 0.6rem;
}
.evalbar__fill { height: 100%; background: var(--gradient); }

.play__msg { color: var(--text-muted); }

/* ─── Post-game review ─── */
.review {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-2);
  padding: 0.7rem 0.85rem;
}
.review__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: var(--step--1);
}
.review__nav { display: flex; gap: 0.3rem; }
.review__nav button {
  min-width: 30px;
  padding: 0.2rem 0.45rem;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  font: inherit;
  font-size: 0.8rem;
  cursor: pointer;
}
.review__nav button:hover:not(:disabled) { border-color: var(--accent-2); }
.review__nav button:disabled { opacity: 0.4; cursor: not-allowed; }

.review__hint {
  margin: 0.4rem 0 0.6rem;
  font-size: 0.72rem;
  color: var(--text-faint);
}

.movelist {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 260px;
  overflow-y: auto;
  font-size: 0.78rem;
}
.movelist li {
  display: grid;
  grid-template-columns: 1.8rem 1fr auto;
  gap: 0.4rem;
  align-items: baseline;
  padding: 0.3rem 0.4rem;
  border-radius: 5px;
  cursor: pointer;
  color: var(--text-muted);
}
.movelist li:hover { background: var(--surface); }
.movelist li.is-sel { background: var(--surface); color: var(--text); box-shadow: inset 2px 0 0 var(--accent-2); }
.movelist__n { color: var(--text-faint); font-variant-numeric: tabular-nums; }
.movelist__mv { font-family: 'Cascadia Code', Consolas, monospace; }
.movelist__ev { font-variant-numeric: tabular-nums; font-size: 0.72rem; }
.movelist li.is-you .movelist__mv { color: var(--text); }
/* Marks a move the engine disagreed with — its own pick differed */
.movelist__flag { color: var(--accent-3); }

.analysis__pref {
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
  color: var(--text-faint);
}
/* Every visited move, not a top-N slice — so it needs to scroll. */
.analysis__top {
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
  max-height: 300px;
  overflow-y: auto;
}
.analysis__cap {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--text-faint);
  margin-bottom: 0.3rem;
}
.analysis__mv {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 0.5rem;
  align-items: center;
  padding: 0.2rem 0.35rem;
  border-radius: 4px;
  font-variant-numeric: tabular-nums;
}
/* Visit share as a bar behind the row — makes the distribution readable
   at a glance instead of forcing you to compare numbers. */
.analysis__bar {
  position: absolute;
  inset: 0;
  border-radius: 4px;
  background: color-mix(in srgb, var(--accent-1) 26%, transparent);
  pointer-events: none;
}
.analysis__mv > * { position: relative; }
.analysis__mv--played { box-shadow: inset 0 0 0 1px var(--accent-2); }
.analysis__sq { font-family: 'Cascadia Code', Consolas, monospace; }
.analysis__pct { color: var(--text-muted); }
.analysis__v { color: var(--text-faint); font-size: 0.72rem; }

/* ─── Endangered toggle ─── */
.toggle {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: 0.7rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  cursor: pointer;
}
.toggle input { cursor: pointer; }
.toggle__key {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin: 0.35rem 0 0;
  font-size: 0.7rem;
  color: var(--text-faint);
}
.key {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}
.key--mine { border: 2px solid var(--accent-3); }
.key--foe { border: 2px solid #22c55e; }

/* Endangered rings. ::before is free here — ::after is the move-hint dot. */
.sq--endang::before {
  content: '';
  position: absolute;
  inset: 6%;
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
}
.sq--endang-mine::before { border: 3px solid var(--accent-3); }
.sq--endang-foe::before  { border: 3px solid #22c55e; }

/* Analysis drops below once three columns stop fitting */
@media (max-width: 1040px) {
  .play__main { grid-template-columns: minmax(0, 1fr) 232px; }
  .play__analysis { grid-column: 1 / -1; }
  .analysis__top { max-height: 220px; }
}
@media (max-width: 700px) {
  .play__main { grid-template-columns: 1fr; }
  .play__side { flex-direction: column; }
}