body.game-board-page .pgn-container {
  --game-board-size: clamp(420px, var(--preferred-board-size, min(56vw, calc(100vh - 366px))), 780px);
  display: grid;
  grid-template-columns: var(--game-board-size) minmax(320px, 430px);
  column-gap: 22px;
  row-gap: 0;
  align-items: start;
  justify-content: center;
  min-width: 0;
  padding: 20px;
  border: 1px solid rgba(0, 200, 255, 0.18);
  background: rgba(5, 13, 20, 0.74);
}

body.game-board-page .board-column {
  grid-column: 1;
  grid-row: 1;
  min-width: 0;
  width: 100%;
  max-width: var(--game-board-size);
  margin: 0 auto;
}

body.game-board-page .board-skin {
  position: relative;
}

body.game-board-page .engine-eval-gauge {
  position: absolute;
  top: 0;
  bottom: 0;
  right: -14px;
  width: 8px;
  z-index: 4;
  overflow: hidden;
  border: 1px solid rgba(0, 200, 255, 0.34);
  background: rgba(232, 241, 245, 0.88);
  box-shadow: 0 0 12px rgba(0, 200, 255, 0.16);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease, border-color 0.18s ease;
}

body.game-board-page .engine-eval-gauge.active {
  opacity: 1;
}

body.game-board-page .engine-eval-gauge.empty {
  opacity: 0;
}

body.game-board-page .engine-eval-gauge.active.empty {
  opacity: 0.32;
}

body.game-board-page .engine-eval-gauge.reverse {
  transform: rotateX(180deg);
}

body.game-board-page .engine-eval-gauge-black {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 50%;
  background: #101820;
  transition: height 0.3s ease;
}

body.game-board-page .engine-eval-gauge::after {
  content: '';
  position: absolute;
  inset: 0;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
}

body.game-board-page .engine-eval-gauge-tick {
  position: absolute;
  left: 0;
  width: 100%;
  border-bottom: 1px solid rgba(0, 200, 255, 0.38);
}

body.game-board-page .engine-eval-gauge-tick.tick-25 {
  top: 25%;
}

body.game-board-page .engine-eval-gauge-tick.tick-50 {
  top: 50%;
  border-bottom-color: rgba(255, 196, 77, 0.82);
}

body.game-board-page .engine-eval-gauge-tick.tick-75 {
  top: 75%;
}

body.game-board-page #chessground-node {
  box-sizing: border-box;
  width: 100%;
  aspect-ratio: 1;
  border: 1px solid rgba(0, 200, 255, 0.72);
  box-shadow: 0 0 18px rgba(0, 200, 255, 0.28);
  background-color: #161a1e;
  position: relative;
}

body.game-board-page #chessground-node:not(.cg-wrap) {
  background-color: var(--cg-light);
  background-image: conic-gradient(var(--cg-dark) 25%, var(--cg-light) 0 50%, var(--cg-dark) 0 75%, var(--cg-light) 0);
  background-size: 25% 25%;
}

body.game-board-page #chessground-node cg-board {
  background-color: var(--cg-light) !important;
  background-image: conic-gradient(var(--cg-dark) 25%, var(--cg-light) 0 50%, var(--cg-dark) 0 75%, var(--cg-light) 0) !important;
  background-size: 25% 25% !important;
}

body.game-board-page #promotion-choice {
  position: absolute;
  inset: 0;
  z-index: 25;
  background: rgba(2, 6, 10, 0.28);
}

body.game-board-page #promotion-choice .promotion-square {
  position: absolute;
  width: 12.5%;
  height: 12.5%;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid rgba(0, 200, 255, 0.52);
  border-radius: 50%;
  background: rgba(218, 229, 234, 0.92);
  box-shadow: inset 0 0 22px rgba(0, 0, 0, 0.28), 0 0 18px rgba(0, 200, 255, 0.22);
  cursor: pointer;
  transition: border-radius 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease, transform 0.16s ease;
}

body.game-board-page #promotion-choice .promotion-square:hover,
body.game-board-page #promotion-choice .promotion-square:focus-visible {
  border-color: var(--cyan);
  border-radius: 0;
  box-shadow: inset 0 0 26px rgba(0, 200, 255, 0.24), 0 0 24px rgba(0, 200, 255, 0.36);
  outline: none;
}

body.game-board-page #promotion-choice piece {
  position: static;
  width: 100%;
  height: 100%;
  display: block;
  background-size: cover;
  pointer-events: none;
  transform: scale(0.82);
  transition: transform 0.16s ease;
}

body.game-board-page #promotion-choice .promotion-square:hover piece,
body.game-board-page #promotion-choice .promotion-square:focus-visible piece {
  transform: scale(0.96);
}

body.game-board-page .board-resize-handle {
  position: absolute;
  right: 3px;
  bottom: 3px;
  width: 24px;
  height: 24px;
  border: 0;
  background: transparent;
  cursor: nwse-resize;
  z-index: 5;
  touch-action: none;
}

body.game-board-page .board-resize-handle::before,
body.game-board-page .board-resize-handle::after {
  content: '';
  position: absolute;
  right: 4px;
  bottom: 4px;
  border-right: 2px solid rgba(0, 200, 255, 0.78);
  border-bottom: 2px solid rgba(0, 200, 255, 0.78);
}

body.game-board-page .board-resize-handle::before {
  width: 16px;
  height: 16px;
}

body.game-board-page .board-resize-handle::after {
  width: 9px;
  height: 9px;
}

body.game-board-page .result-strip {
  display: grid;
  place-items: center;
  min-height: 32px;
  margin-bottom: 6px;
  color: var(--gold);
  font-family: 'Orbitron', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 2px;
}

body.game-board-page .player-tag {
  height: 32px;
  display: flex;
  align-items: center;
  color: var(--white);
  font-family: 'Share Tech Mono', monospace;
  font-size: 15px;
  letter-spacing: 1px;
}

body.game-board-page .player-tag.top {
  margin-bottom: 4px;
}

body.game-board-page .player-tag.bottom {
  margin-top: 4px;
}

body.game-board-page .player-info-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

body.game-board-page .color-indicator {
  width: 14px;
  height: 14px;
  border-radius: 2px;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

body.game-board-page .color-indicator.white {
  background: #f0f0f0;
}

body.game-board-page .color-indicator.black {
  background: #1a1a1a;
  border-color: rgba(0, 200, 255, 0.3);
}

body.game-board-page .player-name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: 'Orbitron', sans-serif;
  font-weight: 600;
  color: var(--white);
  font-size: 15px;
}

body.game-board-page .player-rating {
  color: var(--muted);
  font-size: 13px;
}

body.game-board-page .history-column {
  --engine-panel-height: 52px;
  grid-column: 2;
  grid-row: 1;
  display: grid;
  grid-template-rows: var(--engine-panel-height) minmax(0, 1fr) 48px;
  gap: 0;
  height: var(--game-board-size);
  margin-top: 74px;
  min-width: 0;
  max-width: 430px;
  border: 1px solid rgba(0, 200, 255, 0.18);
  background: rgba(0, 0, 0, 0.46);
  overflow: hidden;
}

body.game-board-page .moves-list {
  flex: 1;
  min-height: 0;
  height: auto;
  overflow-y: auto;
  padding: 8px 0;
  border: 0;
  background: transparent;
  color: var(--cyan);
  font-family: 'Share Tech Mono', monospace;
  font-size: 15px;
  line-height: 1.35;
}

body.game-board-page .moves-list.moves-list-blank {
  color: transparent;
}

body.game-board-page .move-row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) minmax(0, 1fr);
  align-items: center;
  min-height: 34px;
  padding: 0 10px;
}

body.game-board-page .move-row:hover {
  background: rgba(0, 200, 255, 0.05);
}

body.game-board-page .move-link {
  display: block;
  width: 100%;
  min-width: 0;
  padding: 6px 8px;
  cursor: pointer;
  border: 0;
  border-radius: 2px;
  background: transparent;
  font: inherit;
  text-align: left;
  text-decoration: none;
  color: inherit;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

body.game-board-page .move-link:hover {
  background: rgba(0, 200, 255, 0.2);
}

body.game-board-page .move-link.active {
  background: var(--cyan);
  color: var(--void);
  font-weight: bold;
}

body.game-board-page .move-placeholder {
  display: block;
  width: 100%;
  min-width: 0;
  padding: 6px 8px;
  color: var(--muted);
  opacity: 0.7;
  white-space: nowrap;
}

body.game-board-page .move-num {
  color: var(--muted);
  font-size: 0.9em;
  text-align: right;
  padding-right: 8px;
}

body.game-board-page .move-result {
  padding: 8px 18px;
  color: var(--gold);
  font-weight: bold;
}

body.game-board-page .controls {
  display: grid;
  grid-template-columns: repeat(6, minmax(44px, 1fr));
  gap: 8px;
  margin-top: 12px;
}

body.game-board-page .move-navigation {
  align-self: stretch;
  min-height: 0;
  margin-top: 0;
  padding: 6px 10px;
  border-top: 1px solid rgba(0, 200, 255, 0.18);
}

body.game-board-page .move-navigation .btn-node {
  min-width: 0;
  height: 34px;
  padding: 0;
  font-size: 16px;
}

body.game-board-page .opening-explorer-nav-toggle.active {
  color: #00ff9f;
  border-color: rgba(0, 255, 159, 0.55);
  background: rgba(0, 255, 159, 0.12);
  box-shadow: 0 0 15px rgba(0, 255, 159, 0.22);
}

body.game-board-page .btn-node {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--cyan);
  padding: 9px 12px;
  cursor: pointer;
  font-family: 'Orbitron', sans-serif;
  font-size: 16px;
  text-decoration: none;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

body.game-board-page .btn-node:hover {
  border-color: var(--cyan);
  box-shadow: 0 0 15px var(--cyan-glow);
}

body.game-board-page .position-tools {
  grid-column: 1;
  grid-row: 2;
  justify-self: center;
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  max-width: var(--game-board-size);
  min-width: 0;
  margin-top: 12px;
  padding: 6px 10px;
  border: 1px solid rgba(0, 200, 255, 0.18);
  background: rgba(0, 0, 0, 0.28);
}

body.game-board-page .position-action {
  width: 34px;
  height: 34px;
  padding: 0;
  font-size: 15px;
  line-height: 1;
}

body.game-board-page .position-action.active {
  border-color: var(--cyan);
  background: rgba(0, 200, 255, 0.12);
  box-shadow: 0 0 15px var(--cyan-glow);
}

body.game-board-page .position-status {
  flex: 1;
  min-width: 0;
  min-height: 0;
  color: var(--muted);
  font-family: 'Share Tech Mono', monospace;
  font-size: 11px;
  letter-spacing: 1px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

body.game-board-page .mobile-move-navigation {
  display: none;
}

body.game-board-page .analysis-panel {
  height: var(--engine-panel-height);
  overflow: hidden;
  border-bottom: 1px solid rgba(0, 200, 255, 0.18);
  font-family: 'Share Tech Mono', monospace;
  color: var(--cyan);
  position: relative;
}

body.game-board-page .analysis-panel.engine-active,
body.game-board-page .history-column:has(.analysis-panel.engine-active) {
  --engine-panel-height: var(--engine-active-height, 258px);
}

body.game-board-page .analysis-panel.settings-open {
  overflow: visible;
  z-index: 30;
}

body.game-board-page .history-column:has(.analysis-panel.settings-open) {
  overflow: visible;
}

body.game-board-page .analysis-panel.engine-off .analysis-lines,
body.game-board-page .analysis-panel.engine-off .analysis-mode {
  display: none;
}

body.game-board-page .analysis-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 52px;
  padding: 0 12px;
  border-bottom: 1px solid rgba(0, 200, 255, 0.16);
}

body.game-board-page .engine-power {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-width: 96px;
  height: 32px;
  padding: 0 10px;
  border: 1px solid rgba(0, 200, 255, 0.35);
  background: rgba(0, 0, 0, 0.45);
  color: var(--muted);
  cursor: pointer;
  font-family: 'Share Tech Mono', monospace;
  font-size: 10px;
  letter-spacing: 1px;
}

body.game-board-page .engine-power::before {
  content: '';
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--muted);
  box-shadow: inset 0 0 4px rgba(255, 255, 255, 0.25);
}

body.game-board-page .engine-power.active {
  color: var(--white);
  border-color: rgba(0, 255, 159, 0.55);
  background: rgba(0, 255, 159, 0.08);
}

body.game-board-page .engine-power.active::before {
  background: #00ff9f;
  box-shadow: 0 0 12px rgba(0, 255, 159, 0.5);
}

body.game-board-page .engine-power:disabled,
body.game-board-page .engine-power.engine-unavailable {
  cursor: not-allowed;
  opacity: 0.48;
  border-color: rgba(119, 132, 145, 0.35);
  color: rgba(232, 244, 255, 0.42);
}

body.game-board-page .engine-power:disabled::before,
body.game-board-page .engine-power.engine-unavailable::before {
  background: rgba(119, 132, 145, 0.55);
  box-shadow: none;
}

body.game-board-page .analysis-title {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
  flex: 1;
  font-size: 10px;
  letter-spacing: 1px;
}

body.game-board-page .engine-summary {
  color: var(--white);
  font-family: 'Orbitron', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0;
}

body.game-board-page .analysis-status {
  color: var(--muted);
  display: block;
  font-size: 10px;
  letter-spacing: 1px;
  width: auto;
  white-space: nowrap;
}

body.game-board-page .mobile-engine-actions {
  display: none;
}

body.game-board-page .engine-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

body.game-board-page .engine-icon-toggle,
body.game-board-page .engine-settings-toggle {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 1px solid rgba(0, 200, 255, 0.35);
  background: rgba(0, 0, 0, 0.45);
  color: var(--cyan);
  cursor: pointer;
  font-family: 'Share Tech Mono', monospace;
  font-size: 14px;
}

body.game-board-page .engine-icon-toggle svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

body.game-board-page .engine-icon-toggle.active svg {
  opacity: 0.42;
}

body.game-board-page .engine-icon-toggle:hover,
body.game-board-page .engine-icon-toggle.active,
body.game-board-page .engine-settings-toggle:hover,
body.game-board-page .engine-settings-toggle[aria-expanded="true"] {
  border-color: var(--cyan);
  box-shadow: 0 0 12px rgba(0, 200, 255, 0.22);
}

body.game-board-page .engine-settings-popover {
  position: absolute;
  top: 50px;
  right: 12px;
  z-index: 20;
  width: min(340px, calc(100% - 24px));
  padding: 14px;
  border: 1px solid rgba(0, 200, 255, 0.42);
  background: rgba(4, 11, 17, 0.98);
}

body.game-board-page .engine-settings-popover[hidden] {
  display: none;
}

body.game-board-page .engine-setting-row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  align-items: center;
  gap: 14px;
  min-height: 38px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
}

body.game-board-page .engine-setting-row + .engine-setting-row {
  margin-top: 8px;
}

body.game-board-page .engine-setting-row select {
  width: 92px;
  height: 30px;
  border: 1px solid rgba(0, 200, 255, 0.35);
  background: rgba(0, 0, 0, 0.45);
  color: var(--cyan);
  font-family: 'Share Tech Mono', monospace;
}

body.game-board-page .engine-setting-check input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--cyan);
  justify-self: end;
}

body.game-board-page .engine-range-control {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 34px;
  align-items: center;
  gap: 10px;
}

body.game-board-page .engine-range-control input[type="range"] {
  width: 100%;
  accent-color: var(--cyan);
}

body.game-board-page .engine-range-control output {
  color: var(--white);
  text-align: right;
  font-weight: bold;
}

body.game-board-page .engine-setting-check input {
  justify-self: end;
  width: 18px;
  height: 18px;
  accent-color: var(--cyan);
}

body.game-board-page .analysis-row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 10px;
  padding: 7px 10px;
  border-bottom: 1px solid rgba(0, 200, 255, 0.08);
}

body.game-board-page .analysis-value {
  color: var(--white);
  min-width: 0;
}

body.game-board-page .analysis-lines {
  display: grid;
  gap: 1px;
  padding: 6px;
  grid-auto-rows: auto;
  overflow: hidden;
}

body.game-board-page .analysis-line {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 4px;
  min-height: 30px;
  align-items: center;
  padding: 3px 4px;
  color: var(--muted);
  font-size: 13px;
  background: rgba(0, 0, 0, 0.18);
  overflow: hidden;
}

body.game-board-page .analysis-line.expanded {
  align-items: start;
  min-height: 0;
}

body.game-board-page .analysis-line.placeholder {
  opacity: 0.55;
}

body.game-board-page .analysis-line.primary {
  background: rgba(0, 200, 255, 0.08);
}

body.game-board-page .analysis-score {
  color: var(--white);
  font-weight: bold;
  text-align: right;
}

body.game-board-page .analysis-line.expanded .analysis-score {
  padding-top: 1px;
}

body.game-board-page .analysis-pv {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: center;
  gap: 6px;
  min-width: 0;
  overflow: hidden;
}

body.game-board-page .analysis-pv.has-toggle {
  grid-template-columns: minmax(0, 1fr) 12px;
  gap: 3px;
}

body.game-board-page .analysis-pv-moves {
  display: grid;
  gap: 3px;
  min-width: 0;
  overflow: hidden;
}

body.game-board-page .analysis-line.expanded .analysis-pv {
  align-items: flex-start;
}

body.game-board-page .analysis-line.expanded .analysis-pv-moves {
  overflow: visible;
}

body.game-board-page .analysis-pv-row {
  display: flex;
  flex-wrap: nowrap;
  justify-content: flex-start;
  align-items: center;
  gap: 2px;
  font-size: 13px;
  line-height: 1.35;
  min-width: 0;
  overflow: hidden;
}

body.game-board-page .analysis-pv-text {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

body.game-board-page .analysis-pv-move {
  flex: 0 0 auto;
  width: auto;
  max-width: none;
  min-width: 0;
  padding: 0;
  border: 0;
  border-radius: 2px;
  background: transparent;
  color: inherit;
  font: inherit;
  line-height: inherit;
  text-align: left;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: clip;
  cursor: pointer;
}

body.game-board-page .analysis-pv-move:hover,
body.game-board-page .analysis-pv-move:focus-visible {
  color: var(--cyan);
  background: rgba(0, 200, 255, 0.16);
  outline: none;
}

body.game-board-page .analysis-pv-toggle {
  display: grid;
  place-items: center;
  width: 12px;
  height: 20px;
  padding: 0;
  border: 0;
  border-radius: 2px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  line-height: 1;
  cursor: pointer;
}

body.game-board-page .analysis-pv-toggle:hover,
body.game-board-page .analysis-pv-toggle:focus-visible {
  color: var(--cyan);
  background: rgba(0, 200, 255, 0.16);
  outline: none;
}

body.game-board-page .analysis-mode {
  padding: 0 14px 10px;
  height: 36px;
  color: var(--gold);
  font-size: 11px;
  letter-spacing: 1px;
  overflow: hidden;
}

body.game-board-page .analysis-mode:empty {
  display: none;
}

body.game-board-page .move-panel {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
}

body.game-board-page .history-column.explorer-visible .move-panel {
  display: none;
}

body.game-board-page .move-panel-title {
  display: none;
}

body.game-board-page .opening-explorer-panel {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  padding: 12px;
  font-family: 'Share Tech Mono', monospace;
  color: var(--muted);
}

body.game-board-page .opening-explorer-panel[hidden] {
  display: none;
}

body.game-board-page .opening-explorer-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
  color: var(--cyan);
  font-size: 0.72rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

body.game-board-page .opening-explorer-source {
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.8px;
  text-align: right;
}

body.game-board-page .opening-explorer-filters {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) auto auto;
  gap: 6px;
  align-items: end;
  margin-bottom: 12px;
}

body.game-board-page .opening-explorer-filters[hidden] {
  display: none;
}

body.game-board-page .opening-explorer-filters label {
  display: grid;
  gap: 3px;
  min-width: 0;
  color: var(--gold);
  font-size: 0.64rem;
  letter-spacing: 0;
  text-transform: uppercase;
}

body.game-board-page .opening-explorer-filters input,
body.game-board-page .opening-explorer-filters button {
  height: 30px;
  border: 1px solid rgba(0, 200, 255, 0.2);
  background: rgba(0, 0, 0, 0.22);
  color: var(--white);
  font: inherit;
}

body.game-board-page .opening-explorer-filters input {
  width: 100%;
  min-width: 0;
  padding: 0 7px;
}

body.game-board-page .opening-explorer-filters button {
  padding: 0 9px;
  cursor: pointer;
}

body.game-board-page .opening-explorer-filters button:hover {
  border-color: rgba(0, 200, 255, 0.62);
  color: var(--cyan);
}

body.game-board-page .opening-explorer-filters[aria-disabled="true"] {
  opacity: 0.5;
  pointer-events: none;
}

body.game-board-page .opening-explorer-body {
  min-height: 0;
  overflow-y: auto;
  display: grid;
  gap: 14px;
  padding-right: 4px;
}

body.game-board-page .opening-explorer-summary {
  color: var(--white);
  font-size: 0.82rem;
  line-height: 1.35;
}

body.game-board-page .opening-explorer-section-title {
  margin: 0 0 8px;
  color: var(--gold);
  font-size: 0.72rem;
  letter-spacing: 1.3px;
  text-transform: uppercase;
}

body.game-board-page .opening-explorer-moves,
body.game-board-page .opening-explorer-games {
  display: grid;
  gap: 7px;
}

body.game-board-page .opening-explorer-move {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr) 46px;
  gap: 8px;
  align-items: center;
  width: 100%;
  border: 1px solid rgba(0, 200, 255, 0.2);
  background: rgba(0, 200, 255, 0.04);
  color: var(--muted);
  padding: 7px;
  cursor: pointer;
  font: inherit;
  text-align: left;
}

body.game-board-page .opening-explorer-move:hover {
  border-color: rgba(0, 200, 255, 0.62);
  background: rgba(0, 200, 255, 0.1);
}

body.game-board-page .opening-explorer-san {
  color: var(--cyan);
  font-weight: 700;
}

body.game-board-page .opening-explorer-pct {
  color: var(--white);
  text-align: right;
  font-size: 0.76rem;
}

body.game-board-page .opening-explorer-bar {
  display: flex;
  min-width: 0;
  height: 8px;
  overflow: hidden;
  background: rgba(0, 0, 0, 0.36);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

body.game-board-page .opening-explorer-white {
  background: rgba(0, 255, 159, 0.72);
}

body.game-board-page .opening-explorer-draw {
  background: rgba(255, 196, 77, 0.68);
}

body.game-board-page .opening-explorer-black {
  background: rgba(255, 106, 106, 0.7);
}

body.game-board-page .opening-explorer-game {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
  min-height: 34px;
  border-top: 1px solid rgba(0, 200, 255, 0.14);
  color: var(--muted);
  text-decoration: none;
  padding: 7px 2px;
}

body.game-board-page .opening-explorer-game:hover {
  color: var(--white);
}

body.game-board-page .opening-explorer-game strong {
  min-width: 0;
  color: var(--white);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

body.game-board-page .opening-explorer-game span {
  color: var(--gold);
  font-size: 0.76rem;
}

body.game-board-page .opening-explorer-empty {
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.45;
}

body.game-board-page .variation-forest {
  grid-column: 1 / -1;
  margin: 0;
  padding: 5px 0;
  border-top: 1px solid rgba(255, 196, 77, 0.22);
  border-bottom: 1px solid rgba(255, 196, 77, 0.16);
  background: rgba(255, 196, 77, 0.035);
  overflow: hidden;
}

body.game-board-page .variation-forest + .variation-forest {
  border-top: 0;
}

body.game-board-page .variation-line {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 3px 7px;
  min-height: 30px;
  margin: 0;
  padding: 3px 10px 3px calc(30px + (var(--variation-depth, 1) - 1) * 24px);
  border: 0;
  background: transparent;
  color: var(--muted);
  font-family: 'Share Tech Mono', monospace;
  font-size: 14px;
  line-height: 1.55;
}

body.game-board-page .variation-line::before,
body.game-board-page .variation-line::after {
  content: '';
  position: absolute;
  pointer-events: none;
  border-color: rgba(255, 196, 77, 0.38);
}

body.game-board-page .variation-line::before {
  left: calc(13px + (var(--variation-depth, 1) - 1) * 24px);
  top: 0;
  bottom: 0;
  border-left: 2px solid rgba(255, 196, 77, 0.38);
}

body.game-board-page .variation-line::after {
  left: calc(13px + (var(--variation-depth, 1) - 1) * 24px);
  top: 1.02em;
  width: 12px;
  border-top: 2px solid rgba(255, 196, 77, 0.38);
}

body.game-board-page .variation-line:hover {
  background: rgba(255, 196, 77, 0.055);
}

body.game-board-page .sandbox-variation {
  background: rgba(0, 200, 255, 0.035);
}

body.game-board-page .sandbox-variation::before,
body.game-board-page .sandbox-variation::after {
  border-color: rgba(0, 200, 255, 0.48);
}

body.game-board-page .variation-prefix {
  color: var(--gold);
}

body.game-board-page .variation-move {
  border: 0;
  background: transparent;
  color: var(--cyan);
  cursor: pointer;
  font: inherit;
  line-height: 1.35;
  padding: 0 4px;
  border-radius: 6px;
  text-decoration: none;
}

body.game-board-page .variation-move:hover,
body.game-board-page .variation-move.active {
  color: var(--white);
  background: rgba(0, 200, 255, 0.62);
  text-shadow: none;
}

body.game-board-page .variation-menu {
  position: fixed;
  z-index: 1000;
  min-width: 112px;
  border: 1px solid rgba(255, 196, 77, 0.55);
  background: rgba(5, 13, 20, 0.96);
  box-shadow: 0 0 18px rgba(255, 196, 77, 0.18);
  padding: 4px;
  font-family: 'Share Tech Mono', monospace;
}

body.game-board-page .variation-menu button {
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--gold);
  cursor: pointer;
  padding: 8px 10px;
  font: inherit;
  text-align: left;
}

body.game-board-page .variation-menu button:hover {
  background: rgba(255, 196, 77, 0.12);
}

@media(max-width: 1180px) {
  body.game-board-page .pgn-container {
    --game-board-size: clamp(360px, var(--preferred-board-size, min(52vw, calc(100vh - 350px))), 620px);
    grid-template-columns: var(--game-board-size) minmax(300px, 400px);
    column-gap: 18px;
  }
}

@media(max-width: 900px) {
  body.game-board-page .page {
    padding-left: 0;
    padding-right: 0;
  }

  body.game-board-page .pgn-container {
    --game-board-size: clamp(300px, min(100vw, calc(100svh - 204px)), 520px);
    grid-template-columns: var(--game-board-size);
    gap: 0;
    width: 100vw;
    margin-left: calc(50% - 50vw);
    padding: 0;
    border: 0;
    background: transparent;
  }

  @supports not (height: 100svh) {
    body.game-board-page .pgn-container {
      --game-board-size: clamp(300px, min(100vw, calc(100vh - 204px)), 520px);
    }
  }

  body.game-board-page .board-column,
  body.game-board-page .history-column {
    max-width: var(--game-board-size);
    width: 100%;
    justify-self: center;
  }

  body.game-board-page .board-column {
    grid-column: 1;
    grid-row: 1;
  }

  body.game-board-page .history-column {
    grid-column: 1;
    grid-row: 2;
    grid-template-rows: 40px var(--engine-panel-height) minmax(130px, 32vh);
    height: auto;
    margin-top: 0;
    overflow: visible;
  }

  body.game-board-page .result-strip {
    min-height: 22px;
    margin-bottom: 2px;
    font-size: 0.82rem;
    letter-spacing: 1px;
  }

  body.game-board-page .player-tag {
    height: 22px;
    font-size: 12px;
    letter-spacing: 0;
  }

  body.game-board-page .player-tag.top {
    margin-bottom: 2px;
  }

  body.game-board-page .player-tag.bottom {
    margin-top: 2px;
  }

  body.game-board-page .player-info-wrapper {
    gap: 7px;
  }

  body.game-board-page .color-indicator {
    width: 10px;
    height: 10px;
  }

  body.game-board-page .player-name {
    font-size: 12px;
  }

  body.game-board-page .player-rating {
    font-size: 11px;
  }

  body.game-board-page .position-tools {
    display: none;
  }

  body.game-board-page .move-navigation {
    grid-row: 1;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 0;
    margin-top: 0;
    padding: 0;
    border-top: 0;
    border-bottom: 1px solid rgba(0, 200, 255, 0.18);
    background: rgba(0, 0, 0, 0.46);
  }

  body.game-board-page .move-navigation .btn-node {
    height: 40px;
    min-height: 40px;
    border-width: 0 0 0 1px;
    background: rgba(5, 18, 30, 0.78);
    box-shadow: none;
    font-size: 15px;
  }

  body.game-board-page .move-navigation .btn-node:first-child {
    border-left: 0;
  }

  body.game-board-page .analysis-panel {
    grid-row: 2;
    --engine-active-height: 208px;
    background: rgba(0, 0, 0, 0.46);
  }

  body.game-board-page .analysis-panel.engine-active {
    height: max(var(--engine-panel-height), 208px);
  }

  body.game-board-page .move-panel,
  body.game-board-page .opening-explorer-panel {
    grid-row: 3;
  }

  body.game-board-page .history-column:has(.analysis-panel.engine-active) {
    grid-template-rows: 40px max(var(--engine-panel-height), 208px) 0;
  }

  body.game-board-page .history-column:has(.analysis-panel.engine-active) .move-panel {
    display: none;
  }

  body.game-board-page .engine-eval-gauge {
    display: none;
  }

  body.game-board-page .analysis-header {
    min-height: 44px;
    gap: 8px;
    padding: 0 8px;
  }

  body.game-board-page .engine-power {
    min-width: 74px;
    height: 30px;
    padding: 0 8px;
    font-size: 10px;
  }

  body.game-board-page .analysis-title {
    gap: 2px;
  }

  body.game-board-page .engine-summary {
    font-size: 1rem;
  }

  body.game-board-page .analysis-status {
    font-size: 9px;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  body.game-board-page .engine-controls {
    gap: 6px;
  }

  body.game-board-page .mobile-engine-actions {
    display: flex;
    align-items: center;
    gap: 6px;
  }

  body.game-board-page .mobile-engine-actions .save-popover-shell,
  body.game-board-page .mobile-engine-actions .share-popover-shell {
    width: 30px;
    height: 30px;
  }

  body.game-board-page .mobile-engine-actions .position-action {
    width: 30px;
    height: 30px;
    min-height: 30px;
    border-color: rgba(0, 200, 255, 0.35);
    background: rgba(0, 0, 0, 0.45);
  }

  body.game-board-page .analysis-panel:has(.mobile-engine-actions .save-popover:not([hidden])),
  body.game-board-page .analysis-panel:has(.mobile-engine-actions .share-popover:not([hidden])) {
    overflow: visible;
    z-index: 35;
  }

  body.game-board-page .mobile-engine-actions .save-popover,
  body.game-board-page .mobile-engine-actions .share-popover {
    position: fixed;
    top: auto;
    right: auto;
    bottom: auto;
    left: 10px;
    width: min(320px, calc(100vw - 20px));
    max-height: min(310px, calc(100svh - 20px));
    overscroll-behavior: contain;
  }

  body.game-board-page .mobile-engine-actions .share-popover {
    width: min(260px, calc(100vw - 20px));
  }

  body.game-board-page .engine-icon-toggle,
  body.game-board-page .engine-settings-toggle {
    width: 30px;
    height: 30px;
  }

  body.game-board-page .engine-settings-popover {
    top: 42px;
    right: 8px;
    width: min(320px, calc(100% - 16px));
    padding: 10px;
  }

  body.game-board-page .analysis-lines {
    padding: 4px;
  }

  body.game-board-page .analysis-line {
    grid-template-columns: 42px minmax(0, 1fr);
    min-height: 28px;
    padding: 3px 4px;
    font-size: 12px;
  }

  body.game-board-page .analysis-pv-row {
    font-size: 12px;
    line-height: 1.32;
  }

  body.game-board-page .move-row {
    min-height: 30px;
    padding: 0 8px;
  }

  body.game-board-page .move-link,
  body.game-board-page .move-placeholder {
    padding: 5px 6px;
  }
}

@media(max-width: 560px) {
  body.game-board-page .pgn-container {
    --game-board-size: clamp(300px, min(100vw, calc(100svh - 188px)), 420px);
  }

  @supports not (height: 100svh) {
    body.game-board-page .pgn-container {
      --game-board-size: clamp(300px, min(100vw, calc(100vh - 188px)), 420px);
    }
  }

  body.game-board-page .result-strip,
  body.game-board-page .player-tag {
    display: none;
  }

  body.game-board-page .analysis-panel {
    --engine-active-height: 198px;
  }

  body.game-board-page .analysis-panel.engine-active {
    height: max(var(--engine-panel-height), 198px);
  }

  body.game-board-page .history-column:has(.analysis-panel.engine-active) {
    grid-template-rows: 40px max(var(--engine-panel-height), 198px) 0;
  }

  body.game-board-page .analysis-header {
    min-height: 42px;
    align-items: center;
    flex-direction: row;
    padding: 0 6px;
  }

  body.game-board-page .engine-power {
    min-width: 68px;
    width: auto;
    justify-content: center;
  }

  body.game-board-page .engine-controls {
    justify-content: flex-end;
  }

  body.game-board-page .engine-settings-popover {
    top: 40px;
    left: 8px;
    right: 8px;
    width: auto;
  }

  body.game-board-page .analysis-line {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 3px;
    padding: 3px 4px;
    font-size: 12px;
  }

  body.game-board-page .analysis-pv.has-toggle {
    grid-template-columns: minmax(0, 1fr) 12px;
    gap: 3px;
  }

  body.game-board-page .analysis-pv-row {
    gap: 2px;
    font-size: 12px;
  }

  body.game-board-page .analysis-pv-move {
    padding: 0;
  }

  body.game-board-page .analysis-pv-toggle {
    width: 12px;
  }
}