/*
 * neon.css — site chrome and game styling for The Neon Game.
 * Built on the gamekit design tokens (--gk-*) defined in gamekit.css. The
 * site is dark by design: the after-dark palette below overrides the gamekit
 * neutrals in BOTH color schemes, so the game always plays on a near-black
 * board where the eight symbol colors glow like neon tubes. Mobile-first;
 * the board fits a 390×844 viewport with no horizontal overflow.
 */

/* ----- after-dark reskin (dark in both schemes) ----- */

:root {
  color-scheme: dark;

  --gk-accent: #19e6ff;
  --gk-accent-strong: #7df3ff;
  --gk-accent-contrast: #06131a;
  --gk-accent-soft: #10344a;

  --gk-bg: #0a0714;
  --gk-surface: #140f24;
  --gk-surface-2: #1c1533;
  --gk-ink: #efe9ff;
  --gk-ink-soft: #a89fcf;
  --gk-line: #2a2147;
  --gk-line-strong: #3d3163;

  --gk-danger: #ff5c7a;
  --gk-warn: #ffd23c;
  --gk-ok: #3cff7a;

  --gk-shadow-sm: 0 1px 2px rgba(3, 1, 12, 0.5);
  --gk-shadow: 0 1px 2px rgba(3, 1, 12, 0.4), 0 6px 20px rgba(3, 1, 12, 0.5);
  --gk-shadow-lg: 0 24px 60px rgba(2, 0, 10, 0.7);

  /* The eight symbol colors. Each pair's symbols and line share one tube
   * color; the order mirrors internal/puzzle/model.go Symbols. */
  --neon-circle: #ff4d4d;
  --neon-star: #ffd23c;
  --neon-triangle: #19e6ff;
  --neon-square: #3cff7a;
  --neon-diamond: #ff8a1e;
  --neon-plus: #b45cff;
  --neon-heart: #ff2bd6;
  --neon-bolt: #4d7cff;

  --neon-cell: #0e0a1c;
  --neon-cell-line: #241c3d;
}

@media (prefers-color-scheme: dark) {
  :root {
    --gk-accent: #19e6ff;
    --gk-accent-strong: #7df3ff;
    --gk-accent-contrast: #06131a;
    --gk-accent-soft: #10344a;

    --gk-bg: #0a0714;
    --gk-surface: #140f24;
    --gk-surface-2: #1c1533;
    --gk-ink: #efe9ff;
    --gk-ink-soft: #a89fcf;
    --gk-line: #2a2147;
    --gk-line-strong: #3d3163;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--gk-font-sans);
  font-size: var(--gk-fs-md);
  line-height: 1.55;
  color: var(--gk-ink);
  background: var(--gk-bg);
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
}

h1,
h2,
h3 {
  font-family: var(--gk-font-display);
  line-height: 1.2;
  color: var(--gk-ink);
}

h1 {
  font-size: var(--gk-fs-2xl);
  margin: 0 0 var(--gk-space-3);
}

h2 {
  font-size: var(--gk-fs-xl);
  margin: var(--gk-space-6) 0 var(--gk-space-3);
}

h3 {
  font-size: var(--gk-fs-lg);
  margin: var(--gk-space-5) 0 var(--gk-space-2);
}

a {
  color: var(--gk-accent-strong);
}

a:hover {
  color: var(--gk-ink);
}

main {
  flex: 1 0 auto;
  width: 100%;
}

.wrap {
  width: 100%;
  max-width: var(--gk-maxw);
  margin: 0 auto;
  padding-left: max(var(--gk-space-4), env(safe-area-inset-left));
  padding-right: max(var(--gk-space-4), env(safe-area-inset-right));
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--gk-accent);
  color: var(--gk-accent-contrast);
  padding: var(--gk-space-2) var(--gk-space-4);
  border-radius: var(--gk-radius-sm);
  z-index: 100;
}

.skip-link:focus {
  left: var(--gk-space-3);
  top: var(--gk-space-3);
}

/* ----- buttons ----- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--gk-space-2);
  min-height: var(--gk-tap);
  padding: 0 var(--gk-space-5);
  border-radius: var(--gk-radius-pill);
  border: 1px solid transparent;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--gk-transition), border-color var(--gk-transition), color var(--gk-transition), box-shadow var(--gk-transition);
}

.btn-primary {
  background: var(--gk-accent);
  color: var(--gk-accent-contrast);
  box-shadow: 0 0 14px rgba(25, 230, 255, 0.35);
}

.btn-primary:hover {
  background: var(--gk-accent-strong);
  color: var(--gk-accent-contrast);
  box-shadow: 0 0 22px rgba(25, 230, 255, 0.55);
}

.btn-ghost {
  background: var(--gk-surface);
  border-color: var(--gk-line-strong);
  color: var(--gk-ink);
}

.btn-ghost:hover {
  background: var(--gk-surface-2);
  color: var(--gk-ink);
}

.btn:focus-visible {
  outline: 3px solid var(--gk-accent);
  outline-offset: 2px;
}

/* ----- header / nav ----- */

.site-header {
  background: var(--gk-surface);
  border-bottom: 1px solid var(--gk-line);
  position: sticky;
  top: 0;
  z-index: 40;
  padding-top: env(safe-area-inset-top);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--gk-space-3);
  min-height: 60px;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--gk-space-2);
  text-decoration: none;
  color: var(--gk-ink);
  font-family: var(--gk-font-display);
  font-weight: 700;
  margin-right: auto;
}

.brand:hover {
  color: var(--gk-ink);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--gk-radius-sm);
  background: var(--gk-bg);
  border: 2px solid var(--gk-accent);
  color: var(--gk-accent);
  font-weight: 800;
  box-shadow: 0 0 10px rgba(25, 230, 255, 0.55), inset 0 0 6px rgba(25, 230, 255, 0.35);
  text-shadow: 0 0 6px var(--gk-accent);
}

.brand-name {
  font-size: var(--gk-fs-lg);
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: var(--gk-tap);
  height: var(--gk-tap);
  padding: 0 10px;
  background: transparent;
  border: 1px solid var(--gk-line-strong);
  border-radius: var(--gk-radius-sm);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--gk-ink);
  border-radius: 2px;
}

.site-nav {
  display: none;
  width: 100%;
  flex-direction: column;
  gap: var(--gk-space-1);
  padding-bottom: var(--gk-space-3);
}

.site-nav.open {
  display: flex;
}

.site-nav a {
  padding: var(--gk-space-3);
  border-radius: var(--gk-radius-sm);
  text-decoration: none;
  color: var(--gk-ink);
  font-weight: 600;
}

.site-nav a:hover {
  background: var(--gk-surface-2);
}

.site-nav a.active {
  color: var(--gk-accent-strong);
}

.header-account {
  margin-left: auto;
}

.header-account[hidden] {
  display: none;
}

@media (min-width: 820px) {
  .nav-toggle {
    display: none;
  }
  .site-nav {
    display: flex;
    flex-direction: row;
    width: auto;
    align-items: center;
    gap: var(--gk-space-1);
    padding-bottom: 0;
  }
  .header-account {
    margin-left: var(--gk-space-3);
  }
}

/* ----- sections ----- */

.hero {
  padding: var(--gk-space-7) 0 var(--gk-space-4);
  text-align: center;
}

.hero h1 {
  text-shadow: 0 0 18px rgba(25, 230, 255, 0.35);
}

.hero-sub {
  color: var(--gk-ink-soft);
  font-size: var(--gk-fs-lg);
  max-width: 62ch;
  margin: 0 auto;
}

.copy-section {
  padding: var(--gk-space-5) 0 var(--gk-space-6);
  max-width: 78ch;
}

.copy-section p {
  color: var(--gk-ink);
}

.cta-line {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gk-space-3);
  margin: var(--gk-space-4) 0;
}

.feature-list,
.howto-steps,
.rank-list,
.tip-list {
  padding-left: var(--gk-space-5);
}

.feature-list li,
.howto-steps li,
.rank-list li,
.tip-list li {
  margin: var(--gk-space-2) 0;
}

.disclaimer {
  background: var(--gk-surface-2);
  border-left: 3px solid var(--gk-accent);
  padding: var(--gk-space-3) var(--gk-space-4);
  border-radius: var(--gk-radius-sm);
  color: var(--gk-ink-soft);
  font-size: var(--gk-fs-sm);
}

/* ----- FAQ ----- */

.faq-item {
  border: 1px solid var(--gk-line);
  border-radius: var(--gk-radius);
  padding: var(--gk-space-3) var(--gk-space-4);
  margin: var(--gk-space-3) 0;
  background: var(--gk-surface);
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  font-family: var(--gk-font-display);
}

.faq-answer {
  color: var(--gk-ink-soft);
  margin-top: var(--gk-space-2);
}

/* ----- comparison table ----- */

.compare-wrap {
  overflow-x: auto;
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--gk-space-3) 0;
  min-width: 480px;
}

.compare-table th,
.compare-table td {
  border: 1px solid var(--gk-line);
  padding: var(--gk-space-3);
  text-align: left;
  vertical-align: top;
}

.compare-table thead th {
  background: var(--gk-surface-2);
  font-family: var(--gk-font-display);
}

.compare-table th[scope="row"] {
  font-weight: 600;
}

/* ----- archive + library lists ----- */

.archive-list {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--gk-space-2);
}

.archive-list a {
  display: block;
  padding: var(--gk-space-3);
  border: 1px solid var(--gk-line);
  border-radius: var(--gk-radius-sm);
  background: var(--gk-surface);
  text-decoration: none;
  text-align: center;
  color: var(--gk-ink);
}

.archive-list a:hover {
  border-color: var(--gk-accent);
  color: var(--gk-accent-strong);
}

.lib-band-title {
  color: var(--gk-ink-soft);
  font-size: var(--gk-fs-md);
}

.lib-grid {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(64px, 1fr));
  gap: var(--gk-space-2);
}

.lib-grid a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: var(--gk-tap);
  border: 1px solid var(--gk-line);
  border-radius: var(--gk-radius-sm);
  background: var(--gk-surface);
  text-decoration: none;
  color: var(--gk-ink);
  font-weight: 600;
}

.lib-grid a:hover {
  border-color: var(--gk-accent);
  color: var(--gk-accent-strong);
}

.archive-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gk-space-2);
  margin-top: var(--gk-space-4);
  align-items: center;
}

/* ----- play sections ----- */

.play-section {
  padding: var(--gk-space-5) 0 var(--gk-space-6);
}

.play-head {
  text-align: center;
  max-width: 64ch;
  margin: 0 auto var(--gk-space-4);
}

.play-intro {
  color: var(--gk-ink-soft);
}

.play-switch {
  text-align: center;
  margin-top: var(--gk-space-4);
}

/* ----- board shell ----- */

.neon {
  max-width: 560px;
  margin: 0 auto;
  background: var(--gk-surface);
  border: 1px solid var(--gk-line);
  border-radius: var(--gk-radius-lg);
  box-shadow: var(--gk-shadow);
  padding: var(--gk-space-4);
}

.neon-toolbar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--gk-space-3);
  margin-bottom: var(--gk-space-4);
  flex-wrap: wrap;
}

.neon-stats {
  display: flex;
  gap: var(--gk-space-4);
  flex-wrap: wrap;
  justify-content: center;
}

.neon-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.neon-stat-label {
  font-size: var(--gk-fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--gk-ink-soft);
}

.neon-stat-val {
  font-family: var(--gk-font-display);
  font-size: var(--gk-fs-lg);
  font-variant-numeric: tabular-nums;
}

/* Size picker (unlimited mode only). */
.neon-sizes {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--gk-space-2);
  margin-bottom: var(--gk-space-3);
}

.neon-size-btn {
  min-height: 36px;
  padding: 0 var(--gk-space-3);
  border-radius: var(--gk-radius-pill);
  border: 1px solid var(--gk-line-strong);
  background: var(--gk-surface);
  color: var(--gk-ink-soft);
  font: inherit;
  font-size: var(--gk-fs-sm);
  font-weight: 600;
  cursor: pointer;
  transition: border-color var(--gk-transition), color var(--gk-transition), box-shadow var(--gk-transition);
}

.neon-size-btn:hover {
  color: var(--gk-ink);
  border-color: var(--gk-accent);
}

.neon-size-btn.active {
  color: var(--gk-accent);
  border-color: var(--gk-accent);
  box-shadow: 0 0 10px rgba(25, 230, 255, 0.45);
}

.neon-size-btn:focus-visible {
  outline: 3px solid var(--gk-accent);
  outline-offset: 2px;
}

.neon-boardwrap {
  background: var(--gk-bg);
  border-radius: var(--gk-radius);
  padding: var(--gk-space-3);
  border: 1px solid var(--gk-line);
}

.neon-board {
  max-width: 480px;
  margin: 0 auto;
}

.neon-board svg {
  display: block;
  width: 100%;
  height: auto;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  border-radius: var(--gk-radius-sm);
}

.neon-board.shake {
  animation: neon-shake 0.4s ease;
}

/* ----- board pieces (SVG) -----
 * Every symbol and line carries a .neon-sym-<name> class that sets --c, the
 * pair's tube color; the geometry rules below read --c so one rule covers
 * all eight colors. */

.neon-sym-circle { --c: var(--neon-circle); }
.neon-sym-star { --c: var(--neon-star); }
.neon-sym-triangle { --c: var(--neon-triangle); }
.neon-sym-square { --c: var(--neon-square); }
.neon-sym-diamond { --c: var(--neon-diamond); }
.neon-sym-plus { --c: var(--neon-plus); }
.neon-sym-heart { --c: var(--neon-heart); }
.neon-sym-bolt { --c: var(--neon-bolt); }

.neon-cell {
  fill: var(--neon-cell);
  stroke: var(--neon-cell-line);
  stroke-width: 1.5;
  transition: fill var(--gk-transition);
}

.neon-cell.lit {
  fill: #1c1535;
  fill: color-mix(in srgb, var(--c) 18%, var(--neon-cell));
}

.neon-cell.blocked {
  animation: neon-blocked 0.45s ease;
}

/* The glowing tube: a wide soft halo under a narrower bright core. */
.neon-line {
  fill: none;
  stroke: var(--c);
  stroke-width: 30;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.92;
  pointer-events: none;
  filter: drop-shadow(0 0 6px var(--c));
}

.neon-line.dim {
  opacity: 0.55;
  filter: none;
}

.neon-line.astray {
  animation: neon-astray 0.7s ease;
}

.neon-line-core {
  fill: none;
  stroke: #ffffff;
  stroke-width: 8;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.55;
  pointer-events: none;
}

.neon-line.done {
  opacity: 1;
  filter: drop-shadow(0 0 10px var(--c));
}

/* Symbol glyphs sit on a dark puck so the tube reads as passing under them. */
.neon-puck {
  fill: var(--neon-cell);
  stroke: var(--c);
  stroke-width: 4;
  pointer-events: none;
  filter: drop-shadow(0 0 5px var(--c));
}

.neon-puck.done {
  fill: var(--c);
}

.neon-glyph {
  fill: var(--c);
  stroke: var(--c);
  stroke-width: 3;
  stroke-linejoin: round;
  pointer-events: none;
}

.neon-puck.done + .neon-glyph {
  fill: var(--neon-cell);
  stroke: var(--neon-cell);
}

.neon-puck.pulse {
  animation: neon-puck-pulse 0.9s ease-in-out 2;
}

.neon-hintmark {
  fill: none;
  stroke: var(--gk-warn);
  stroke-width: 6;
  stroke-dasharray: 10 8;
  pointer-events: none;
  animation: neon-hint-spin 2.4s linear infinite;
  transform-box: fill-box;
  transform-origin: center;
  filter: drop-shadow(0 0 6px var(--gk-warn));
}

/* Invisible hit layer over everything so pointer math stays simple. */
.neon-hit {
  fill: transparent;
  stroke: none;
}

/* ----- actions + message ----- */

.neon-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gk-space-2);
  justify-content: center;
  margin-top: var(--gk-space-4);
}

.neon-hint-btn.cooldown {
  opacity: 0.55;
  cursor: default;
}

.neon-message {
  text-align: center;
  min-height: 1.5em;
  margin: var(--gk-space-3) 0 0;
  color: var(--gk-ink-soft);
  font-size: var(--gk-fs-sm);
}

.neon-noscript {
  color: var(--gk-ink-soft);
  text-align: center;
}

/* ----- win overlay ----- */

.neon-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--gk-space-4);
  background: rgba(4, 1, 14, 0.72);
  z-index: 60;
}

.neon-overlay[hidden] {
  display: none;
}

.neon-overlay-card {
  background: var(--gk-surface);
  border: 1px solid var(--gk-line-strong);
  border-radius: var(--gk-radius-lg);
  box-shadow: var(--gk-shadow-lg), 0 0 40px rgba(25, 230, 255, 0.12);
  padding: var(--gk-space-6);
  max-width: 440px;
  width: 100%;
  text-align: center;
  max-height: calc(100dvh - 2 * var(--gk-space-4));
  overflow-y: auto;
}

.neon-overlay-close {
  position: sticky;
  top: calc(-1 * var(--gk-space-6));
  float: right;
  margin: calc(-1 * var(--gk-space-6)) calc(-1 * var(--gk-space-6)) 0 0;
  border: 0;
  background: none;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--gk-ink-soft);
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
  z-index: 1;
}

/* Three staggered glowing bars — the win cheer. */
.neon-cheer {
  display: flex;
  gap: var(--gk-space-2);
  justify-content: center;
  align-items: flex-end;
  height: 34px;
  margin-bottom: var(--gk-space-2);
}

.neon-cheer span {
  display: block;
  width: 12px;
  height: 22px;
  border-radius: var(--gk-radius-pill);
  background: var(--neon-triangle);
  box-shadow: 0 0 10px var(--neon-triangle);
  animation: neon-cheer-bob 1.1s ease-in-out infinite;
}

.neon-cheer span:nth-child(2) {
  animation-delay: 0.15s;
  background: var(--neon-circle);
  box-shadow: 0 0 10px var(--neon-circle);
}

.neon-cheer span:nth-child(3) {
  animation-delay: 0.3s;
  background: var(--neon-star);
  box-shadow: 0 0 10px var(--neon-star);
}

.neon-overlay-sub {
  color: var(--gk-ink-soft);
}

.neon-overlay-stats {
  display: flex;
  justify-content: center;
  gap: var(--gk-space-5);
  margin: var(--gk-space-4) 0;
  flex-wrap: wrap;
}

.neon-overlay-stats div {
  display: flex;
  flex-direction: column;
}

.neon-overlay-stats dt {
  font-size: var(--gk-fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--gk-ink-soft);
}

.neon-overlay-stats dd {
  margin: 0;
  font-family: var(--gk-font-display);
  font-size: var(--gk-fs-lg);
  font-variant-numeric: tabular-nums;
}

.neon-overlay-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gk-space-2);
  justify-content: center;
  margin-top: var(--gk-space-4);
}

.neon-share-status {
  color: var(--gk-ink-soft);
  font-size: var(--gk-fs-sm);
  min-height: 1.2em;
}

/* ----- leaderboard panel + page ----- */

.neon-lb-panel {
  margin-top: var(--gk-space-4);
  text-align: left;
}

.neon-lb-title {
  font-size: var(--gk-fs-lg);
  margin: 0 0 var(--gk-space-2);
}

.neon-lb-signin {
  color: var(--gk-ink-soft);
  font-size: var(--gk-fs-sm);
}

.lb-page {
  margin-top: var(--gk-space-4);
}

.lb-controls {
  margin-bottom: var(--gk-space-4);
}

.lb-date-label {
  display: inline-flex;
  flex-direction: column;
  gap: var(--gk-space-1);
  font-size: var(--gk-fs-sm);
  color: var(--gk-ink-soft);
}

.lb-date {
  min-height: var(--gk-tap);
  padding: 0 var(--gk-space-3);
  border: 1px solid var(--gk-line-strong);
  border-radius: var(--gk-radius-sm);
  background: var(--gk-surface);
  color: var(--gk-ink);
  font: inherit;
}

/* ----- footer ----- */

.site-footer {
  flex-shrink: 0;
  background: var(--gk-surface);
  border-top: 1px solid var(--gk-line);
  margin-top: var(--gk-space-7);
  padding: var(--gk-space-6) 0 calc(var(--gk-space-6) + env(safe-area-inset-bottom));
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--gk-space-5);
}

.footer-col h2 {
  font-size: var(--gk-fs-md);
  margin: 0 0 var(--gk-space-2);
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col li {
  margin: var(--gk-space-1) 0;
}

.footer-col a {
  color: var(--gk-ink-soft);
  text-decoration: none;
}

.footer-col a:hover {
  color: var(--gk-accent-strong);
}

.footer-note {
  margin-top: var(--gk-space-5);
  color: var(--gk-ink-soft);
  font-size: var(--gk-fs-sm);
}

.error-page {
  text-align: center;
}

/* ----- animations ----- */

@keyframes neon-shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-5px); }
  40% { transform: translateX(5px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

@keyframes neon-blocked {
  0% { fill: var(--gk-danger); }
  100% { fill: var(--neon-cell); }
}

@keyframes neon-astray {
  0%, 100% { stroke: var(--c); }
  30%, 70% { stroke: var(--gk-danger); }
}

@keyframes neon-puck-pulse {
  0%, 100% { stroke-width: 4; }
  50% { stroke-width: 9; }
}

@keyframes neon-hint-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes neon-cheer-bob {
  0%, 100% { height: 14px; }
  50% { height: 30px; }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ----- fullscreen board layout (neon-specific) -----
 * The generic fullscreen shell lives in gamekit.css. .neon and
 * .neon-boardwrap carry data-gk-fs-fit; the board scales to the available
 * height so the whole grid stays visible. */
html.gk-fullscreen .neon { display: flex; flex-direction: column; flex: 1; min-height: 0; max-width: none; }
html.gk-fullscreen .neon-boardwrap { flex: 1; min-height: 0; display: flex; align-items: center; justify-content: center; }
html.gk-fullscreen .neon-board { width: 100%; max-width: min(92vw, calc(100dvh - 240px)); }
html.gk-fullscreen .play-section > *:not(.neon) { display: none; }
html.gk-fullscreen.gk-fs-tight .neon-toolbar { margin-bottom: var(--gk-space-2); }
html.gk-fullscreen.gk-fs-tight .neon-stat-val { font-size: var(--gk-fs-md); }
html.gk-fullscreen.gk-fs-tight .neon-boardwrap { padding: var(--gk-space-2); }
html.gk-fullscreen.gk-fs-tight .neon-actions .btn { min-height: 34px; padding: 4px 14px; font-size: var(--gk-fs-sm); }
html.gk-fullscreen.gk-fs-tight .neon { padding: var(--gk-space-3); }