/**
 * Merokalam Bagh-Chal — visual design
 * ======================================
 * Deliberately distinct from the blue SaaS-tool palette used elsewhere on
 * Merokalam: warm ivory paper, charcoal ink, deep Nepali crimson, restrained
 * gold accents, a natural wooden board panel. The board is the hero — the
 * surrounding UI stays quiet.
 */

#bx-root {
  --bx-ivory: #ffffff;
  --bx-paper: #ffffff;
  --bx-ink: #2a2420;
  --bx-ink-soft: #5a5148;
  --bx-muted: #8a8073;
  --bx-border: #d9e3f2;
  --bx-blue: #2563eb;
  --bx-blue-dark: #1d4ed8;
  --bx-blue-soft: #eff6ff;
  --bx-crimson: #9c2b2b;
  --bx-crimson-dark: #7a1f1f;
  --bx-crimson-soft: #f3e2e2;
  --bx-gold: #c8a24a;
  --bx-gold-soft: #f3ead0;
  --bx-wood: #caa06b;
  --bx-wood-dark: #7a5a34;
  --bx-wood-line: #5c4326;
  --bx-tiger-dark: #211c19;
  --bx-goat-light: #f7efdc;
  --bx-success: #2f6f4f;
  --bx-shadow-sm: 0 1px 3px rgba(42, 36, 32, 0.08);
  --bx-shadow: 0 8px 28px rgba(42, 36, 32, 0.12);
  --bx-radius: 16px;
  --bx-radius-sm: 10px;
  --bx-dur: 220ms;
  font-family: 'Noto Sans Devanagari', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  color: var(--bx-ink);
  background: var(--bx-ivory);
}

#bx-root * { box-sizing: border-box; }

#bx-root button {
  font-family: inherit;
  cursor: pointer;
}

#bx-root .bx-visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

[data-theme="dark"] #bx-root {
  --bx-ivory: #0b1220;
  --bx-paper: #111827;
  --bx-ink: #f8fafc;
  --bx-ink-soft: #cbd5e1;
  --bx-muted: #94a3b8;
  --bx-border: #26364d;
  --bx-blue: #60a5fa;
  --bx-blue-dark: #3b82f6;
  --bx-blue-soft: #14233a;
  --bx-crimson: #f87171;
  --bx-crimson-dark: #ef4444;
  --bx-crimson-soft: #2c1720;
  --bx-wood-line: #8b7357;
  --bx-success: #34d399;
  --bx-shadow-sm: 0 1px 3px rgba(0,0,0,0.35);
  --bx-shadow: 0 12px 30px rgba(0,0,0,0.42);
  color-scheme: dark;
}

[data-theme="dark"] body {
  background: #0b1220;
  color: #f8fafc;
}

html:not([data-theme="dark"]) body {
  background: #e8e8eb;
}

[data-theme="dark"] .mk-nav {
  background: #0f172a;
  border-color: #1e293b;
  box-shadow: 0 1px 4px rgba(0,0,0,0.35);
}

.mk-nav .theme-btn {
  width: 34px;
  height: 34px;
  min-width: 34px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--bx-border);
  border-radius: 10px;
  background: var(--bx-paper);
  color: var(--bx-ink);
  line-height: 1;
}

.mk-nav .theme-btn svg {
  width: 17px;
  height: 17px;
  display: block;
  flex: 0 0 17px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.mk-nav .theme-btn svg path,
.mk-nav .theme-btn svg circle {
  fill: none;
  stroke: currentColor;
}

.mk-nav .theme-btn .icon-sun {
  display: none;
}

[data-theme="dark"] .mk-nav .theme-btn {
  background: #111827;
  border-color: #26364d;
  color: #e5edf7;
}

[data-theme="dark"] .mk-nav .theme-btn .icon-moon {
  display: none;
}

[data-theme="dark"] .mk-nav .theme-btn .icon-sun {
  display: block;
}

.mk-nav .theme-btn:hover {
  border-color: var(--bx-blue);
  background: var(--bx-blue-soft);
}

[data-theme="dark"] #bx-select-screen,
[data-theme="dark"] #bx-game-screen {
  background: #0f172a;
}

[data-theme="dark"] .bx-title-native {
  color: #60a5fa;
}

[data-theme="dark"] #bx-resume-banner,
[data-theme="dark"] .bx-diff-btn[aria-pressed="true"] {
  background: #13243b;
  border-color: #3b82f6;
}

[data-theme="dark"] .bx-side-card,
[data-theme="dark"] .bx-mode-card,
[data-theme="dark"] .bx-name-field,
[data-theme="dark"] .bx-diff-btn,
[data-theme="dark"] .bx-icon-btn,
[data-theme="dark"] .bx-panel,
[data-theme="dark"] .bx-board-wrap,
[data-theme="dark"] .bx-modal {
  background: #111827;
  border-color: #26364d;
  color: var(--bx-ink);
}

[data-theme="dark"] .bx-side-card[aria-pressed="true"] {
  background: #2b1720;
  border-color: #f87171;
}

[data-theme="dark"] .bx-mode-card[aria-pressed="true"] {
  background: #13243b;
  border-color: #60a5fa;
}

[data-theme="dark"] .bx-name-field input {
  background: #0f172a;
  border-color: #334155;
  color: #f8fafc;
}

[data-theme="dark"] .bx-icon-btn:hover {
  background: #172d4b;
  border-color: #60a5fa;
}

[data-theme="dark"] .bx-svg {
  background: #0b1220;
}

[data-theme="dark"] .bx-line {
  stroke: #8b7357;
}

[data-theme="dark"] .bx-dot {
  fill: #9a866f;
  opacity: 0.7;
}

[data-theme="dark"] .bx-piece-disc {
  fill: rgba(15, 23, 42, 0.9);
}

[data-theme="dark"] #bx-history-panel th,
[data-theme="dark"] #bx-history-panel td {
  border-color: #26364d;
}

[data-theme="dark"] .bx-field-row {
  border-color: #26364d;
}

[data-theme="dark"] .bx-field-row select,
[data-theme="dark"] .bx-modal-close {
  background: #0f172a;
  border-color: #26364d;
  color: var(--bx-ink);
}

/* ---------------------------------------------------------------------- */
/* Selection screen                                                       */
/* ---------------------------------------------------------------------- */

#bx-select-screen {
  max-width: 1040px;
  margin: 0.9rem auto 0;
  padding: 1.65rem 2.4rem 3rem;
  text-align: center;
  background: #fff;
  border: 1.5px solid var(--bx-blue-dark);
  box-shadow: none;
}

.bx-title-block { margin-bottom: 1.75rem; }

.bx-title-native {
  font-size: clamp(2.2rem, 6vw, 3.1rem);
  font-weight: 800;
  color: #0f8edb;
  margin: 0 0 0.15rem;
  letter-spacing: 0.01em;
}

.bx-title-en {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--bx-ink-soft);
  margin: 0 0 0.4rem;
}

.bx-tagline {
  color: var(--bx-muted);
  font-size: 1rem;
  margin: 0;
}

#bx-resume-banner {
  background: var(--bx-blue-soft);
  border: 1px solid #bfdbfe;
  border-radius: var(--bx-radius-sm);
  padding: 0.9rem 1.1rem;
  margin: 1.25rem 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1rem;
  align-items: center;
  justify-content: space-between;
  text-align: left;
}
#bx-resume-banner[hidden] { display: none; }
#bx-resume-info { font-size: 0.88rem; color: var(--bx-ink-soft); }
.bx-resume-actions { display: flex; gap: 0.5rem; }

.bx-section-label {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bx-muted);
  margin: 1.75rem 0 0.75rem;
}

.bx-side-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.bx-side-card {
  background: var(--bx-paper);
  border: 2px solid var(--bx-border);
  border-radius: var(--bx-radius);
  padding: 1.35rem 1rem 1.15rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  transition: border-color var(--bx-dur) ease, transform var(--bx-dur) ease, box-shadow var(--bx-dur) ease;
  box-shadow: var(--bx-shadow-sm);
}
.bx-side-card:hover { transform: translateY(-2px); box-shadow: var(--bx-shadow); }
.bx-side-card img { width: 60px; height: 60px; }
.bx-side-card strong { font-size: 1.05rem; }
.bx-side-card span { font-size: 0.82rem; color: var(--bx-muted); }
.bx-side-card[aria-pressed="true"] {
  border-color: var(--bx-crimson);
  background: var(--bx-crimson-soft);
}

.bx-mode-grid,
.bx-name-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.bx-mode-card,
.bx-name-field {
  background: var(--bx-paper);
  border: 2px solid var(--bx-border);
  border-radius: var(--bx-radius);
  padding: 1rem;
  box-shadow: var(--bx-shadow-sm);
}

.bx-mode-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  transition: border-color var(--bx-dur) ease, background var(--bx-dur) ease, transform var(--bx-dur) ease;
}

.bx-mode-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--bx-shadow);
}

.bx-mode-card strong { font-size: 1rem; }

.bx-mode-card span,
.bx-name-field span {
  color: var(--bx-muted);
  font-size: 0.82rem;
}

.bx-mode-card[aria-pressed="true"] {
  border-color: #60a5fa;
  background: var(--bx-blue-soft);
}

.bx-name-field {
  display: grid;
  gap: 0.45rem;
  text-align: left;
}

.bx-name-field input {
  width: 100%;
  border: 1px solid var(--bx-border);
  border-radius: 10px;
  padding: 0.7rem 0.75rem;
  color: var(--bx-ink);
  background: #fff;
  font: inherit;
  font-weight: 700;
  box-sizing: border-box;
}

.bx-name-field input:focus {
  outline: 2px solid rgba(37, 99, 235, 0.22);
  border-color: #60a5fa;
}

[data-engine-only][hidden],
#bx-local-options[hidden] {
  display: none;
}

.bx-diff-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.6rem;
}

.bx-diff-btn {
  background: var(--bx-paper);
  border: 2px solid var(--bx-border);
  border-radius: var(--bx-radius-sm);
  padding: 0.65rem 0.4rem;
  font-weight: 700;
  font-size: 0.88rem;
  transition: border-color var(--bx-dur) ease, background var(--bx-dur) ease;
}
.bx-diff-btn small { display: block; font-weight: 500; font-size: 0.68rem; color: var(--bx-muted); margin-top: 0.15rem; }
.bx-diff-btn[aria-pressed="true"] { border-color: #60a5fa; background: var(--bx-blue-soft); }

.bx-start-btn {
  margin-top: 2rem;
  background: var(--bx-crimson);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 0.9rem 2.6rem;
  font-weight: 800;
  font-size: 1.02rem;
  letter-spacing: 0.02em;
  box-shadow: var(--bx-shadow);
  transition: background var(--bx-dur) ease, transform var(--bx-dur) ease;
}
.bx-start-btn:hover { background: var(--bx-crimson-dark); transform: translateY(-1px); }

.bx-howto-link {
  display: inline-block;
  margin-top: 1.1rem;
  color: var(--bx-ink-soft);
  font-size: 0.88rem;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------------------------------------------------------------------- */
/* Game screen layout                                                     */
/* ---------------------------------------------------------------------- */

#bx-game-screen[hidden], #bx-select-screen[hidden] { display: none; }

#bx-game-screen {
  max-width: 900px;
  margin: clamp(1.75rem, 5vh, 3.5rem) auto 0;
  padding: 0.9rem 1.35rem 1.25rem;
  background: #fff;
  border: 1.5px solid var(--bx-blue-dark);
  box-shadow: none;
}

.bx-game-toolbar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 0.65rem;
  flex-wrap: wrap;
}

.bx-toolbar-actions {
  display: flex;
  justify-content: center;
  gap: 0.4rem;
  flex-wrap: wrap;
  width: 100%;
}

.bx-icon-btn {
  background: var(--bx-paper);
  border: 1px solid var(--bx-border);
  border-radius: var(--bx-radius-sm);
  padding: 0.5rem 0.85rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--bx-ink);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: border-color var(--bx-dur) ease, background var(--bx-dur) ease;
}
.bx-icon-btn:hover { border-color: var(--bx-blue); background: var(--bx-blue-soft); }
.bx-icon-btn:disabled { opacity: 0.45; cursor: not-allowed; }
.bx-icon-btn.bx-loading { opacity: 0.6; }

/*
 * The board leads. It spans the full row up top, sized generously, and the
 * two supporting panels (turn/status info, match stats) sit in a light row
 * underneath it rather than squeezing it between two side columns.
 */
.bx-game-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-areas:
    "board board"
    "info  match";
  gap: 1.1rem;
  align-items: start;
  justify-items: center;
  max-width: 560px;
  margin: 0 auto;
}

.bx-panel {
  background: var(--bx-paper);
  border: 1px solid var(--bx-border);
  border-radius: var(--bx-radius);
  padding: 1rem 1.1rem;
  box-shadow: var(--bx-shadow-sm);
  width: 100%;
  box-sizing: border-box;
}

.bx-info-panel { grid-area: info; }
.bx-match-panel { grid-area: match; }

.bx-info-panel .bx-role { font-size: 0.82rem; color: var(--bx-muted); margin-bottom: 0.15rem; }
.bx-info-panel .bx-role strong { color: var(--bx-ink); }
.bx-status-line { font-weight: 800; font-size: 1.05rem; margin: 0.65rem 0 0.15rem; }
.bx-status-detail { font-size: 0.85rem; color: var(--bx-ink-soft); min-height: 1.2em; }

#bx-thinking {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.6rem;
  font-size: 0.82rem;
  color: var(--bx-crimson);
  font-weight: 700;
}
#bx-thinking[hidden] { display: none; }
.bx-thinking-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--bx-crimson);
  animation: bx-pulse 1s ease-in-out infinite;
}
@keyframes bx-pulse { 0%, 100% { opacity: 0.25; transform: scale(0.8); } 50% { opacity: 1; transform: scale(1.1); } }

.bx-match-stat { display: flex; justify-content: space-between; font-size: 0.86rem; padding: 0.35rem 0; border-bottom: 1px dashed var(--bx-border); }
.bx-match-stat:last-child { border-bottom: none; }
.bx-match-stat strong { color: var(--bx-crimson); }

.bx-board-wrap {
  grid-area: board;
  background: #fff;
  border: 1px solid var(--bx-border);
  border-radius: 12px;
  padding: 0.65rem;
  box-shadow: none;
  position: relative;
  width: 100%;
  max-width: 560px;
  margin: 0 auto;
  box-sizing: border-box;
}

.bx-svg {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  background: #ffffff;
  border-radius: 8px;
  touch-action: manipulation;
}
.bx-svg.bx-shake { animation: bx-shake 0.24s ease; }
@keyframes bx-shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

.bx-line { stroke: var(--bx-wood-line); stroke-width: 2.5; stroke-linecap: round; }

.bx-node { outline: none; cursor: pointer; }
.bx-hit { fill: transparent; }
.bx-ring { fill: none; stroke: transparent; stroke-width: 3; transition: stroke var(--bx-dur) ease; }
.bx-dot { fill: var(--bx-wood-line); opacity: 0.55; transition: opacity var(--bx-dur) ease; }
.bx-node-occupied .bx-dot { opacity: 0; }

.bx-node:focus-visible .bx-ring { stroke: var(--bx-gold); stroke-width: 4; }
.bx-node-selected .bx-ring { stroke: var(--bx-crimson); }
.bx-node-legal .bx-dot { opacity: 1; fill: var(--bx-success); r: 7; }
.bx-node-legal .bx-ring { stroke: var(--bx-success); opacity: 0.55; }
.bx-node-capture .bx-ring { stroke: var(--bx-crimson); stroke-width: 4.5; }
.bx-node-capture .bx-dot { opacity: 1; fill: var(--bx-crimson); }
.bx-node-lastmove .bx-ring { stroke: var(--bx-gold); opacity: 0.9; }
.bx-node-hint .bx-ring { stroke: #2f6fbf; stroke-width: 4.5; stroke-dasharray: 4 3; }

.bx-coords { pointer-events: none; }
.bx-coord-text { font-size: 8px; fill: var(--bx-wood-line); opacity: 0; font-weight: 700; transition: opacity var(--bx-dur) ease; }
.bx-coords-visible .bx-coord-text { opacity: 0.55; }

.bx-piece {
  pointer-events: none;
  transition: transform var(--bx-dur) cubic-bezier(0.34, 1.1, 0.64, 1);
}
.bx-piece-shadow { fill: rgba(0,0,0,0.24); }
.bx-piece-disc { fill: rgba(255, 250, 239, 0.92); }
.bx-piece-image { pointer-events: none; }
.bx-piece-tiger .bx-piece-rim { fill: none; stroke: var(--bx-gold); stroke-width: 2; opacity: 0.95; }
.bx-piece-goat .bx-piece-rim { fill: none; stroke: var(--bx-crimson); stroke-width: 1.8; opacity: 0.82; }

.bx-piece-enter { animation: bx-enter 220ms ease; }
@keyframes bx-enter { from { transform: scale(0.35); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.bx-piece-captured { transition: transform 380ms ease, opacity 380ms ease; transform: scale(0.15) !important; opacity: 0; }

@media (prefers-reduced-motion: reduce) {
  .bx-piece, .bx-piece-enter, .bx-piece-captured, .bx-svg.bx-shake { transition: none !important; animation: none !important; }
}
#bx-root[data-animation="reduced"] .bx-piece,
#bx-root[data-animation="reduced"] .bx-piece-enter,
#bx-root[data-animation="reduced"] .bx-piece-captured { transition: none !important; animation: none !important; }

/* ---------------------------------------------------------------------- */
/* Move history / tutorial                                                */
/* ---------------------------------------------------------------------- */

#bx-history-panel[hidden] { display: none; }
#bx-history-panel {
  margin-top: 1rem;
  max-height: 260px;
  overflow: auto;
}
#bx-history-panel table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
#bx-history-panel th, #bx-history-panel td { padding: 0.35rem 0.5rem; text-align: left; border-bottom: 1px solid var(--bx-border); }
#bx-history-panel th { color: var(--bx-muted); font-weight: 700; text-transform: uppercase; font-size: 0.68rem; letter-spacing: 0.08em; }

#bx-tutorial-tip[hidden] { display: none; }
#bx-tutorial-tip {
  position: fixed;
  left: 50%;
  bottom: 1.25rem;
  transform: translateX(-50%);
  background: var(--bx-ink);
  color: #fff;
  padding: 0.7rem 1.1rem;
  border-radius: 999px;
  font-size: 0.85rem;
  max-width: 90vw;
  box-shadow: var(--bx-shadow);
  z-index: 60;
}

/* ---------------------------------------------------------------------- */
/* Modals: settings + game over                                           */
/* ---------------------------------------------------------------------- */

.bx-modal-overlay {
  position: fixed; inset: 0;
  background: rgba(30, 24, 18, 0.5);
  display: flex; align-items: center; justify-content: center;
  z-index: 80;
  padding: 1rem;
}
.bx-modal-overlay[hidden] { display: none; }
.bx-modal {
  background: var(--bx-paper);
  border-radius: var(--bx-radius);
  padding: 1.5rem;
  max-width: 420px;
  width: 100%;
  box-shadow: var(--bx-shadow);
  max-height: 88vh;
  overflow: auto;
}
.bx-modal h2 { margin: 0 0 1rem; font-size: 1.1rem; color: var(--bx-crimson); }
.bx-field-row { display: flex; align-items: center; justify-content: space-between; padding: 0.55rem 0; border-bottom: 1px solid var(--bx-border); font-size: 0.9rem; }
.bx-field-row:last-of-type { border-bottom: none; }
.bx-field-row select { padding: 0.3rem 0.5rem; border-radius: 8px; border: 1px solid var(--bx-border); background: var(--bx-ivory); }
.bx-modal-close { margin-top: 1.1rem; width: 100%; padding: 0.7rem; border-radius: var(--bx-radius-sm); border: 1px solid var(--bx-border); background: var(--bx-ivory); font-weight: 700; }

.bx-gameover-card { text-align: center; }
.bx-gameover-card h2 { font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--bx-muted); margin: 0 0 0.4rem; }
.bx-gameover-title { font-size: 1.7rem; font-weight: 800; color: var(--bx-crimson); margin: 0 0 0.5rem; }
.bx-gameover-reason { color: var(--bx-ink-soft); margin: 0 0 0.9rem; }
.bx-gameover-stats { font-size: 0.85rem; color: var(--bx-muted); margin: 0 0 1.25rem; }
.bx-gameover-actions { display: flex; flex-direction: column; gap: 0.55rem; }
.bx-gameover-actions .bx-start-btn { margin: 0; }

.bx-review-bar {
  position: fixed; left: 0; right: 0; bottom: 0;
  background: var(--bx-ink); color: #fff;
  display: flex; align-items: center; justify-content: center; gap: 1rem;
  padding: 0.7rem 1rem; z-index: 55;
}
.bx-review-bar[hidden] { display: none; }
.bx-review-bar button { background: transparent; border: 1px solid rgba(255,255,255,0.3); color: #fff; border-radius: 8px; padding: 0.4rem 0.8rem; }

/* ---------------------------------------------------------------------- */
/* Responsive                                                             */
/* ---------------------------------------------------------------------- */

@media (max-width: 640px) {
  #bx-select-screen,
  #bx-game-screen {
    margin-top: 1rem;
    width: min(100% - 16px, 900px);
    padding-left: 0.55rem;
    padding-right: 0.55rem;
  }

  .bx-game-toolbar {
    margin-bottom: 0.5rem;
  }

  .bx-toolbar-actions {
    flex-wrap: nowrap;
    gap: 0.25rem;
  }

  .bx-toolbar-actions .bx-icon-btn {
    flex: 1 1 0;
    min-width: 0;
    justify-content: center;
    padding: 0.45rem 0.25rem;
    font-size: clamp(0.66rem, 2.7vw, 0.78rem);
    line-height: 1.1;
    white-space: nowrap;
    border-radius: 9px;
  }

  /* Phones: board, then info, then match stats, each full width and stacked. */
  .bx-game-grid {
    grid-template-columns: 1fr;
    grid-template-areas: "board" "info" "match";
    gap: 0.8rem;
    width: 100%;
    max-width: 100%;
  }
  .bx-board-wrap {
    width: 100%;
    max-width: 100%;
    padding: 0.45rem;
    overflow: hidden;
  }
  .bx-svg {
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
    display: block;
  }
  .bx-panel {
    max-width: 100%;
    padding: 0.85rem;
  }
  .bx-side-grid { grid-template-columns: 1fr 1fr; gap: 0.6rem; }
  .bx-mode-grid,
  .bx-name-grid { grid-template-columns: 1fr; gap: 0.6rem; }
  .bx-diff-grid { grid-template-columns: repeat(2, 1fr); }
  .bx-toolbar-actions .bx-icon-btn span.bx-btn-label { display: none; }
}

/* ---------------------------------------------------------------------- */
/* Title as semantic H1 (visually identical to the old two-line title)    */
/* ---------------------------------------------------------------------- */

.bx-title-h1 {
  margin: 0;
  font-weight: 400;
  line-height: 1.1;
}
.bx-title-h1 .bx-title-en,
.bx-title-h1 .bx-title-native {
  display: block;
}

/* ---------------------------------------------------------------------- */
/* "How to Play" control (button, not link)                               */
/* ---------------------------------------------------------------------- */

button.bx-howto-link {
  background: none;
  border: none;
  padding: 0;
  font-family: inherit;
}
button.bx-howto-link[aria-expanded="true"] {
  color: var(--bx-crimson);
  font-weight: 700;
}

/* ---------------------------------------------------------------------- */
/* Guide / Game Manual                                                    */
/* ---------------------------------------------------------------------- */

.bx-guide[hidden] { display: none; }

.bx-guide {
  background: var(--bx-ivory, #fff);
  border-top: 1px solid var(--bx-border, #d9e3f2);
  margin-top: 2.5rem;
  padding: 2.5rem 1.35rem 4rem;
  font-family: 'Noto Sans Devanagari', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  color: var(--bx-ink, #2a2420);
}

.bx-guide-inner {
  max-width: 900px;
  margin: 0 auto;
}

.bx-back-to-game {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--bx-paper, #fff);
  border: 1.5px solid var(--bx-border, #d9e3f2);
  border-radius: 999px;
  padding: 0.55rem 1.15rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--bx-crimson, #9c2b2b);
  margin-bottom: 1.5rem;
  font-family: inherit;
  transition: border-color 220ms ease, background 220ms ease;
}
.bx-back-to-game:hover { border-color: var(--bx-crimson, #9c2b2b); background: var(--bx-crimson-soft, #f3e2e2); }
.bx-back-to-game:last-of-type { margin-top: 2.25rem; margin-bottom: 0; }

.bx-guide-title {
  font-size: clamp(1.4rem, 3.4vw, 1.9rem);
  font-weight: 800;
  color: var(--bx-ink, #2a2420);
  margin: 0 0 0.6rem;
  line-height: 1.25;
}

.bx-guide-lede {
  color: var(--bx-ink-soft, #5a5148);
  font-size: 1rem;
  margin: 0 0 2.25rem;
  max-width: 62ch;
}

.bx-guide-h2 {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--bx-crimson, #9c2b2b);
  margin: 2.4rem 0 0.85rem;
  padding-top: 0.25rem;
  border-top: 1px solid var(--bx-border, #d9e3f2);
}
.bx-guide-inner > .bx-guide-h2:first-of-type { border-top: none; padding-top: 0; margin-top: 0; }

.bx-guide p {
  line-height: 1.7;
  font-size: 0.96rem;
  color: var(--bx-ink, #2a2420);
  margin: 0 0 1rem;
}

/* Rules-at-a-glance table */
.bx-rule-table-wrap { overflow-x: auto; margin: 0.5rem 0 1rem; }
.bx-rule-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bx-paper, #fff);
  border: 1px solid var(--bx-border, #d9e3f2);
  border-radius: var(--bx-radius-sm, 10px);
  overflow: hidden;
  font-size: 0.9rem;
}
.bx-rule-table th {
  background: var(--bx-blue-soft, #eff6ff);
  color: var(--bx-ink, #2a2420);
  font-weight: 800;
  text-align: left;
  padding: 0.65rem 0.9rem;
}
.bx-rule-table td {
  padding: 0.6rem 0.9rem;
  border-top: 1px solid var(--bx-border, #d9e3f2);
}

/* Sub-cards: How Goats Play, How to Win */
.bx-subcard-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.85rem;
  margin: 0.5rem 0 1rem;
}
.bx-subcard-grid-2 { grid-template-columns: repeat(2, 1fr); }
.bx-subcard {
  background: var(--bx-paper, #fff);
  border: 1px solid var(--bx-border, #d9e3f2);
  border-radius: var(--bx-radius, 16px);
  padding: 1rem 1.1rem;
}
.bx-subcard strong { display: block; color: var(--bx-crimson, #9c2b2b); font-size: 0.92rem; margin-bottom: 0.35rem; }
.bx-subcard p { font-size: 0.88rem; margin: 0; color: var(--bx-ink-soft, #5a5148); }

/* Capture example diagram */
.bx-capture-example {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.9rem;
  flex-wrap: wrap;
  background: var(--bx-paper, #fff);
  border: 1px solid var(--bx-border, #d9e3f2);
  border-radius: var(--bx-radius, 16px);
  padding: 1.35rem 1rem;
  margin: 0.5rem 0 0.75rem;
}
.bx-capture-step { display: flex; flex-direction: column; align-items: center; gap: 0.4rem; font-size: 0.8rem; font-weight: 700; color: var(--bx-ink-soft, #5a5148); }
.bx-capture-step img { display: block; }
.bx-capture-empty {
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 2.5px dashed var(--bx-wood-line, #5c4326);
  opacity: 0.6;
}
.bx-capture-arrow { font-size: 1.5rem; color: var(--bx-gold, #c8a24a); font-weight: 900; }
.bx-capture-caption { font-size: 0.85rem; color: var(--bx-ink-soft, #5a5148); text-align: center; }

/* Difficulty explainer */
.bx-diff-explain-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.7rem;
  margin: 0.5rem 0 1rem;
}
.bx-diff-explain {
  background: var(--bx-blue-soft, #eff6ff);
  border: 1px solid var(--bx-border, #d9e3f2);
  border-radius: var(--bx-radius-sm, 10px);
  padding: 0.8rem 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.bx-diff-explain strong { font-size: 0.88rem; color: var(--bx-ink, #2a2420); }
.bx-diff-explain span { font-size: 0.78rem; color: var(--bx-ink-soft, #5a5148); }

/* Common mistakes */
.bx-mistake-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.9rem;
  margin: 0.5rem 0 1rem;
}
.bx-mistake-card {
  background: var(--bx-paper, #fff);
  border: 1px solid var(--bx-border, #d9e3f2);
  border-radius: var(--bx-radius, 16px);
  padding: 1rem 1.1rem;
}
.bx-mistake-card strong { display: block; color: var(--bx-crimson, #9c2b2b); font-size: 0.92rem; margin-bottom: 0.5rem; }
.bx-mistake-card ul { margin: 0; padding-left: 1.15rem; font-size: 0.87rem; color: var(--bx-ink-soft, #5a5148); line-height: 1.6; }
.bx-mistake-card li { margin-bottom: 0.25rem; }

/* Bilingual terms box */
.bx-terms-wrap { margin: 0.5rem 0 1rem; }
.bx-terms-label { font-size: 0.85rem; color: var(--bx-ink-soft, #5a5148); margin: 0 0 0.5rem; }
.bx-terms-table {
  width: 100%;
  max-width: 420px;
  border-collapse: collapse;
  background: var(--bx-paper, #fff);
  border: 1px solid var(--bx-border, #d9e3f2);
  border-radius: var(--bx-radius-sm, 10px);
  overflow: hidden;
  font-size: 0.88rem;
}
.bx-terms-table th {
  background: var(--bx-gold-soft, #f3ead0);
  text-align: left;
  padding: 0.5rem 0.8rem;
  font-weight: 800;
}
.bx-terms-table td { padding: 0.5rem 0.8rem; border-top: 1px solid var(--bx-border, #d9e3f2); }

/* FAQ accordion */
.bx-faq { margin: 0.5rem 0 1rem; border-top: 1px solid var(--bx-border, #d9e3f2); }
.bx-faq-item { border-bottom: 1px solid var(--bx-border, #d9e3f2); }
.bx-faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 0.9rem 0.1rem;
  font-size: 0.94rem;
  font-weight: 700;
  color: var(--bx-ink, #2a2420);
  font-family: inherit;
  gap: 1rem;
}
.bx-faq-q::after {
  content: '+';
  flex: 0 0 auto;
  font-size: 1.2rem;
  font-weight: 900;
  color: var(--bx-crimson, #9c2b2b);
}
.bx-faq-q[aria-expanded="true"]::after { content: '\2212'; }
.bx-faq-a[hidden] { display: none; }
.bx-faq-a { padding: 0 0.1rem 1rem; }
.bx-faq-a p { margin: 0; font-size: 0.9rem; color: var(--bx-ink-soft, #5a5148); }

@media (max-width: 640px) {
  .bx-subcard-grid { grid-template-columns: 1fr; }
  .bx-diff-explain-grid { grid-template-columns: repeat(2, 1fr); }
  .bx-mistake-grid { grid-template-columns: 1fr; }
  .bx-guide { padding: 2rem 1rem 3rem; }
}

[data-theme="dark"] .bx-guide { background: var(--bx-ivory); }
[data-theme="dark"] .bx-rule-table th,
[data-theme="dark"] .bx-diff-explain,
[data-theme="dark"] .bx-terms-table th { background: var(--bx-blue-soft); }
[data-theme="dark"] .bx-subcard,
[data-theme="dark"] .bx-capture-example,
[data-theme="dark"] .bx-mistake-card,
[data-theme="dark"] .bx-rule-table,
[data-theme="dark"] .bx-terms-table,
[data-theme="dark"] .bx-back-to-game {
  background: var(--bx-paper);
  border-color: var(--bx-border);
}