/* chess.css - CHESS/64 Chess Lab: page shell, controls, analysis panel.
   Loaded after base.css, which owns the tokens, the header and the footer.
   Board, squares, pieces and the promotion dialog live in chess-board.css.

   The site's game.css is deliberately NOT loaded here: this page ships as a
   two-stylesheet page, so the shared .game-* vocabulary it borrows from
   /ultimate-tic-tac-toe is restated below rather than imported. Keep the
   restated values in step with personal_website/game.css. */

[hidden] {
  display: none;
}
.chess-main {
  padding-top: 94px;
}

/* ---------------------------------------------------------------- hero */

.game-hero {
  width: min(1152px, calc(100% - 48px));
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.7fr);
  gap: clamp(30px, 7vw, 96px);
  align-items: end;
  margin: 0 auto;
  padding: clamp(72px, 10vw, 118px) 0 clamp(54px, 8vw, 88px);
  border-bottom: 1px solid var(--line);
}

.game-hero h1 {
  max-width: 760px;
  margin-top: 14px;
  font-size: clamp(3.4rem, 7.5vw, 6rem);
  line-height: 0.95;
}

.game-hero-copy > p {
  color: var(--muted);
  font-size: 1.05rem;
  font-weight: 300;
  line-height: 1.7;
}

.page-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 24px;
}

.page-actions a {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  padding: 11px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  font-size: 0.82rem;
  font-weight: 800;
}

.page-actions a:first-child {
  color: white;
  border-color: var(--teal-dark);
  background: var(--teal-dark);
}
/* --------------------------------------------------------------- shell */

.game-shell {
  width: min(1240px, calc(100% - 44px));
  display: grid;
  grid-template-columns: minmax(206px, 0.46fr) minmax(0, 1fr) minmax(238px, 0.64fr);
  gap: clamp(20px, 2.6vw, 38px);
  margin: 52px auto 30px;
  padding: clamp(18px, 2.6vw, 36px);
  border: 1px solid var(--line);
  border-radius: 40px;
  background: var(--panel);
  box-shadow: var(--shadow);
  scroll-margin-top: 100px;
}

.game-controls {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.game-kicker {
  color: var(--cardinal);
}

.game-kicker,
.game-controls legend,
.game-label,
.game-history-head,
.chess-depth,
.chess-captured-tag {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.game-controls h2 {
  margin-top: 12px;
  font-size: clamp(2rem, 3.6vw, 3.2rem);
}

.game-intro,
.chess-note {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.6;
}

.game-intro {
  margin-top: 16px;
  font-size: 0.88rem;
}

.chess-note {
  margin-top: 8px;
  font-size: 0.76rem;
}

.game-controls fieldset {
  margin: 20px 0 0;
  padding: 0;
  border: 0;
  min-width: 0;
}

.game-controls legend,
.game-label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
}

.game-label {
  margin-top: 20px;
}

.game-segmented {
  display: grid;
  grid-template-columns: 1fr 1fr;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 999px;
}

.game-segmented button {
  min-height: 40px;
  border: 0;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.72rem;
  font-weight: 800;
}

.game-segmented button[aria-pressed="true"] {
  color: white;
  background: var(--ink);
}

.game-controls select,
.chess-input {
  width: 100%;
  min-width: 0;
  min-height: 42px;
  padding: 0 14px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  font: inherit;
  font-size: 0.84rem;
}

.game-primary {
  min-height: 46px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 16px;
  padding: 0 18px;
  color: white;
  border: 0;
  border-radius: 999px;
  background: var(--teal-dark);
  cursor: pointer;
  font-family: inherit;
  font-weight: 800;
}

.chess-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-top: 12px;
}

.chess-btn {
  min-height: 38px;
  padding: 0 12px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.74rem;
  font-weight: 800;
}

.chess-btn:hover:enabled {
  border-color: var(--ink);
}

.chess-btn:disabled {
  color: var(--line);
  cursor: not-allowed;
}

.chess-btn-wide {
  grid-column: 1 / -1;
}

@media (prefers-reduced-motion: no-preference) {
  .page-actions a, .game-primary, .chess-btn {
    transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
  }
}

.page-actions a:hover, .game-primary:hover, .chess-btn:hover:enabled {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(41, 37, 36, 0.1);
}

/* ---- responsive overrides (media queries last so they win) ---- */

/* Overrides for .chess-analysis, .game-notes, .game-history and .chess-captured
   live in the stylesheet that defines them: those files load after this one, so
   a media rule here would lose the cascade to their base rules. */
@media (max-width: 1140px) {
  .game-shell {
    grid-template-columns: minmax(200px, 0.52fr) minmax(0, 1fr);
  }
}

@media (max-width: 900px) {
  .chess-main {
    padding-top: 0;
  }

  .game-hero,
  .game-shell {
    grid-template-columns: 1fr;
  }

  .game-controls {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-content: start;
    gap: 0 18px;
  }

  .chess-controls-head,
  .chess-actions {
    grid-column: 1 / -1;
  }
}

@media (max-width: 650px) {
  .game-hero { width: min(100% - 28px, 1152px); }

  .game-shell {
    width: min(100% - 24px, 1240px);
    padding: 16px;
    border-radius: 28px;
  }

  .game-controls {
    grid-template-columns: 1fr;
  }

  .game-controls > * {
    grid-column: 1;
  }

  .chess-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}