:root {
  --bg: #ffffff;
  --app-bg-image: none;
  --app-bg-size: auto;
  --app-bg-position: center;
  --app-bg-repeat: repeat;
  --panel: #ffffff;
  --surface: #ffffff;
  --ink: #111111;
  --muted: #6a6a6a;
  --line: transparent;
  --soft: #f6f6f6;
  --control-bg: rgba(17, 17, 17, 0.04);
  --control-text: #111111;
  --shadow: none;
  --layout-gap: clamp(8px, 1vw, 14px);
  --app-pad-x: clamp(6px, 0.9vw, 10px);
  --app-pad-bottom: clamp(6px, 0.9vw, 10px);
  --panel-pad: clamp(6px, 0.8vw, 8px);
  --rail-width: clamp(168px, 17vw, 222px);
  --rail-side-bleed: 18px;
  --rail-stage-gap: clamp(14px, 1.5vw, 24px);
  --rail-top-pad: clamp(24px, 3vh, 38px);
  --rail-toggle-size: 32px;
  --rail-toggle-inset: 8px;
  --rail-stone-gap: 10px;
  --circle-size: clamp(48px, 5vw, 56px);
  --right-column-min: clamp(220px, 22vw, 320px);
  --board-stage-offset: calc(var(--rail-width) + var(--rail-stage-gap));
  --board-stage-height-limit: calc(100dvh - var(--app-pad-bottom) - (var(--panel-pad) * 2));
  --board-stage-width-limit: calc(100vw - (var(--app-pad-x) * 2) - var(--layout-gap) - var(--right-column-min) - var(--board-stage-offset) - (var(--panel-pad) * 2));
  --board-stage-size: clamp(280px, min(var(--board-stage-height-limit), var(--board-stage-width-limit)), var(--board-stage-height-limit));
  --board-main-width: calc(var(--board-stage-size) + var(--board-stage-offset));
  --status-offset: var(--board-stage-offset);
  --z-board-column: 20;
  --z-board-stage: 1;
  --z-board-status: 24;
  --z-palette-menu: 170;
  --z-control-rail: 220;
  --z-rail-toggle: 240;
  --z-library-backdrop: 190;
  --z-library-menu: 260;
  --button-border: #111111;
  --button-dark-bg: #111111;
  --button-dark-text: #ffffff;
  --button-light-bg: #ffffff;
  --button-light-text: #111111;
  --button-strong-bg: #111111;
  --button-strong-text: #ffffff;
  --button-strong-border: #111111;
  --button-label-light: #ffffff;
  --palette-grid-width: 344px;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--ink);
  background-color: var(--bg);
  background-image: var(--app-bg-image);
  background-size: var(--app-bg-size);
  background-position: var(--app-bg-position);
  background-repeat: var(--app-bg-repeat);
  background-attachment: fixed;
  overflow: hidden;
}

.app-shell {
  width: 100vw;
  height: 100vh;
  padding: 0 var(--app-pad-x) var(--app-pad-bottom);
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 0;
}

.runtime-error {
  margin-top: clamp(6px, 0.8vw, 10px);
  margin-bottom: clamp(6px, 0.8vw, 10px);
  padding: 14px 16px;
  border: 1px solid #b81f1f;
  border-radius: 18px;
  background: #fff5f5;
  color: #7a1414;
  line-height: 1.45;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, var(--board-main-width)) minmax(0, 1fr);
  gap: var(--layout-gap);
  align-items: stretch;
  min-height: 0;
  height: 100%;
}

.board-column,
.cloud-column {
  min-height: 0;
  height: 100%;
}

.board-column {
  position: relative;
  overflow: visible;
  z-index: var(--z-board-column);
}

.panel {
  border: 0;
  border-radius: 24px;
  background: transparent;
  box-shadow: none;
}

.board-panel,
.cloud-panel {
  padding: var(--panel-pad);
  height: 100%;
}

.board-panel {
  position: relative;
  display: grid;
  grid-template-rows: minmax(0, 1fr);
  gap: 0;
  justify-items: start;
  align-content: stretch;
  min-height: 100%;
  padding-top: 0;
  width: 100%;
  overflow: visible;
}

.panel-row,
.cloud-toolbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}

.panel-row {
  width: var(--board-main-width);
}

.top-controls {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  justify-content: flex-start;
  width: 100%;
}

.appearance-controls {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  width: auto;
  max-width: 100%;
}

.mode-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  gap: 8px;
  padding: 8px 10px;
  width: auto;
  min-height: 40px;
  border-radius: 999px;
  background: var(--control-bg);
  color: var(--muted);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.mode-toggle input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--ink);
}

.status-text,
.analysis-meta,
.move-info,
.advanced-copy {
  color: var(--muted);
  line-height: 1.4;
}

.move-info {
  margin-top: 2px;
}

.size-picker label {
  display: block;
  margin-bottom: 4px;
  font-size: 0.66rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.size-picker select,
.advanced-panel input,
.advanced-panel select,
.auto-count-control input {
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--control-bg);
  color: var(--control-text);
  font: inherit;
}

.size-picker select,
.advanced-panel input,
.advanced-panel select {
  width: 100%;
  padding: 8px 12px;
}

.palette-picker {
  position: relative;
  min-width: 0;
}

.palette-trigger {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: 0;
  border: 1px solid rgba(127, 127, 127, 0.24);
  border-radius: 999px;
  background: color-mix(in srgb, var(--control-bg) 78%, var(--surface));
  color: var(--control-text);
  font: inherit;
  cursor: pointer;
  transition: transform 120ms ease;
}

.palette-swatch,
.palette-option-swatch {
  --swatch-tone-a: #111111;
  --swatch-tone-b: #ffffff;
  --swatch-ring: rgba(17, 17, 17, 0.25);
  width: 20px;
  height: 20px;
  border-radius: 999px;
  border: 1px solid var(--swatch-ring);
  background: linear-gradient(130deg, var(--swatch-tone-a) 0 50%, var(--swatch-tone-b) 50% 100%);
  flex-shrink: 0;
}

.palette-swatch {
  width: 24px;
  height: 24px;
}

.palette-menu {
  position: fixed;
  top: 0;
  left: 0;
  transform: translateY(-50%);
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  align-items: center;
  justify-items: center;
  gap: 8px;
  width: min(var(--palette-grid-width), calc(100vw - 24px));
  max-width: 0;
  padding: 6px 0;
  border: 1px solid transparent;
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 95%, transparent);
  backdrop-filter: blur(4px);
  z-index: var(--z-palette-menu);
  white-space: normal;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  transform-origin: left center;
  transition:
    max-width 320ms cubic-bezier(0.22, 1, 0.36, 1),
    padding 320ms cubic-bezier(0.22, 1, 0.36, 1),
    border-color 220ms ease,
    opacity 180ms ease;
}

.palette-picker.open .palette-menu,
.palette-menu.is-open {
  max-width: min(var(--palette-grid-width), calc(100vw - 24px));
  padding: 6px 8px;
  border-color: rgba(127, 127, 127, 0.24);
  opacity: 1;
  pointer-events: auto;
}

.palette-menu[data-side="left"] {
  transform: translate(-100%, -50%);
  transform-origin: right center;
}

.palette-menu[data-side="bottom"] {
  transform: none;
  transform-origin: top left;
  max-width: min(var(--palette-grid-width), calc(100vw - 24px));
}

.palette-option {
  width: 100%;
  max-width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0;
  font: inherit;
  color: var(--ink);
  background: color-mix(in srgb, var(--control-bg) 52%, transparent);
  cursor: pointer;
}

.palette-option:hover {
  background: var(--control-bg);
}

.palette-option.active {
  border-color: color-mix(in srgb, var(--ink) 34%, transparent);
  background: color-mix(in srgb, var(--control-bg) 80%, transparent);
}

.palette-option[data-palette-key]:not([data-palette-key="mono"]) .palette-option-swatch,
.palette-trigger[data-palette-key]:not([data-palette-key="mono"]) .palette-swatch {
  filter: saturate(0.8);
}

select {
  color: var(--control-text);
}

select option,
select optgroup {
  color: var(--ink);
  background: var(--surface);
}

.pixi-stage {
  position: relative;
  overflow: hidden;
  border: 0;
  border-radius: 28px;
  background: transparent;
  min-height: 0;
  z-index: 0;
}

.pixi-stage canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.board-main-area {
  position: relative;
  isolation: isolate;
  width: var(--board-main-width);
  height: 100%;
  min-height: 0;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  padding-left: var(--board-stage-offset);
  padding-bottom: 0;
  overflow: visible;
}

.board-stage {
  width: var(--board-stage-size);
  height: var(--board-stage-size);
  aspect-ratio: 1 / 1;
  min-width: 280px;
  max-width: 100%;
  max-height: 100%;
  margin: 0;
  position: relative;
  z-index: var(--z-board-stage);
}

.board-status-box {
  position: absolute;
  top: 8px;
  left: 3vw;
  width: var(--board-main-width);
  height: 58px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  backdrop-filter: none;
  overflow: hidden;
  z-index: var(--z-board-status);
  pointer-events: none;
}

.board-status-box .status-text,
.board-status-box .move-info {
  margin: 0;
  color: var(--ink);
}

.board-status-box .status-text {
  width: 100%;
  padding-left: var(--status-offset);
  padding-top: 6px;
  padding-right: 6px;
  text-align: left;
  white-space: normal;
  max-height: 100%;
  overflow-x: hidden;
  overflow-y: auto;
  text-overflow: clip;
  overflow-wrap: anywhere;
}

.control-rail {
  position: absolute;
  left: calc(-1 * var(--rail-side-bleed));
  top: 0;
  bottom: 0;
  width: calc(var(--rail-width) + (var(--rail-side-bleed) * 2) + var(--rail-toggle-inset));
  height: 100%;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: 10px;
  padding: var(--rail-top-pad) calc(var(--rail-side-bleed) + var(--rail-toggle-inset)) 12px var(--rail-side-bleed);
  border: 0;
  border-radius: 0;
  background: transparent;
  transform: none;
  overflow-x: visible;
  overflow-y: auto;
  z-index: var(--z-control-rail);
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.control-rail::-webkit-scrollbar {
  display: none;
}

.control-rail > :nth-child(2) {
  --roll-index: 0;
}

.control-rail > :nth-child(3) {
  --roll-index: 1;
}

.control-rail > :nth-child(4) {
  --roll-index: 2;
}

.control-rail > :nth-child(5) {
  --roll-index: 3;
}

.control-rail > :not(.rail-toggle-btn) {
  --roll-index: 0;
  opacity: 1;
  transform: translate3d(0, 0, 0);
  transform-origin: right center;
  transition:
    opacity 140ms ease,
    transform 220ms cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: calc(var(--roll-index) * 24ms);
}

.rail-toggle-btn {
  position: absolute;
  top: var(--rail-top-pad);
  right: var(--rail-toggle-inset);
  transform: none;
  width: var(--rail-toggle-size);
  height: var(--rail-toggle-size);
  border: 1px solid rgba(127, 127, 127, 0.26);
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  backdrop-filter: blur(10px);
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  line-height: 1;
  cursor: pointer;
  z-index: var(--z-rail-toggle);
  isolation: isolate;
  transition:
    transform 220ms cubic-bezier(0.22, 1, 0.36, 1),
    opacity 140ms ease,
    background-color 180ms ease,
    border-color 180ms ease;
}

.rail-toggle-icon {
  position: relative;
  z-index: 1;
  display: inline-block;
  font-size: 0.82rem;
  transition: transform 280ms cubic-bezier(0.22, 1, 0.36, 1);
}

.board-main-area.rail-collapsed .control-rail > :not(.rail-toggle-btn) {
  opacity: 0;
  transform: translate3d(-26px, 0, 0);
  pointer-events: none;
  transition-delay: calc((3 - var(--roll-index)) * 18ms);
}

.board-main-area.rail-collapsed .rail-toggle-btn {
  transform: translate(calc(-1 * var(--rail-width) - var(--panel-pad) - var(--app-pad-x) + var(--rail-toggle-size) - var(--rail-toggle-inset)), 0);
}

.board-main-area.rail-collapsed .rail-toggle-icon {
  transform: translateX(1px);
}

.play-controls {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  justify-content: stretch;
  justify-items: center;
  gap: var(--rail-stone-gap);
  align-items: center;
  padding: var(--rail-stone-gap);
  border: 1px solid color-mix(in srgb, var(--ink) 12%, transparent);
  border-radius: 18px;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(14px);
  box-shadow: 0 16px 34px color-mix(in srgb, var(--ink) 10%, transparent);
  position: relative;
  align-self: stretch;
  z-index: 6;
}

.play-controls .stone-button,
.autoplay-controls .stone-button,
.board-export-actions .mini-pill-button {
  justify-self: center;
  text-align: center;
}

.appearance-box {
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--rail-stone-gap);
  padding: var(--rail-stone-gap);
  border: 1px solid color-mix(in srgb, var(--ink) 12%, transparent);
  border-radius: 16px;
  background: color-mix(in srgb, var(--surface) 90%, transparent);
  backdrop-filter: blur(14px);
  box-shadow: 0 16px 32px color-mix(in srgb, var(--ink) 9%, transparent);
}

.appearance-box .mode-toggle {
  width: 100%;
  min-height: 36px;
  justify-content: center;
  gap: 6px;
  font-size: 0.6rem;
  letter-spacing: 0.05em;
  padding: 6px 8px;
}

.stone-size-picker {
  width: 100%;
  grid-column: 1 / -1;
}

.stone-size-picker select {
  text-align: center;
}

.sgf-library-menu {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: min(520px, 88vw);
  max-height: min(84vh, 760px);
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px;
  border: 1px solid rgba(127, 127, 127, 0.25);
  border-radius: 12px;
  background: color-mix(in srgb, var(--surface) 96%, transparent);
  z-index: var(--z-library-menu);
  pointer-events: auto;
  overflow: hidden;
}

body.library-menu-open::before {
  content: "";
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.08);
  z-index: var(--z-library-backdrop);
  pointer-events: none;
}

.sgf-library-menu[hidden] {
  display: none !important;
}

.sgf-library-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.sgf-library-title {
  margin: 0;
  font-size: 0.7rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.sgf-library-close {
  width: 24px;
  height: 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--control-bg);
  color: var(--ink);
  line-height: 1;
  cursor: pointer;
}

.sgf-library-search {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: var(--control-bg);
  color: var(--control-text);
  font: inherit;
}

.sgf-library-list {
  min-height: 120px;
  max-height: min(62vh, 500px);
  flex: 1 1 auto;
  min-width: 0;
  overflow: auto;
  border: 1px solid rgba(127, 127, 127, 0.2);
  border-radius: 10px;
  background: color-mix(in srgb, var(--surface) 90%, transparent);
  padding: 6px;
}

.sgf-library-empty {
  margin: 0;
  padding: 10px 8px;
  color: var(--muted);
  font-size: 0.85rem;
}

.sgf-folder {
  margin: 0;
}

.sgf-folder summary {
  list-style: none;
  cursor: pointer;
  padding: 5px 8px;
  border-radius: 8px;
  color: var(--ink);
  font-size: 0.84rem;
}

.sgf-folder summary:hover {
  background: var(--control-bg);
}

.sgf-folder summary::-webkit-details-marker {
  display: none;
}

.sgf-folder-children {
  margin-left: 12px;
  border-left: 1px dashed rgba(127, 127, 127, 0.25);
  padding-left: 8px;
}

.sgf-file-btn {
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-size: 0.82rem;
  padding: 5px 8px;
  cursor: pointer;
}

.sgf-file-btn:hover {
  background: var(--control-bg);
}

.stone-button {
  width: var(--circle-size);
  height: var(--circle-size);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--button-border);
  font: inherit;
  font-weight: 550;
  font-size: 0.9rem;
  text-align: center;
  line-height: 1;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease;
}

.stone-button:hover,
.pill-button:hover {
  transform: translateY(-1px);
}

.stone-button-black {
  background: color-mix(in srgb, var(--button-dark-bg) 82%, var(--surface));
  color: color-mix(in srgb, var(--button-dark-text) 92%, var(--ink));
  box-shadow: none;
}

.stone-button-white {
  background: color-mix(in srgb, var(--button-light-bg) 86%, var(--surface));
  color: color-mix(in srgb, var(--button-light-text) 88%, var(--ink));
  box-shadow: none;
}

.stone-button.active:not(.computer-button) {
  outline: 3px solid color-mix(in srgb, var(--ink) 58%, transparent);
  outline-offset: 2px;
}

.computer-button.active {
  box-shadow: none;
  outline: 3px solid color-mix(in srgb, var(--ink) 72%, transparent);
  outline-offset: 4px;
}

.autoplay-controls .computer-button.active {
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--bg) 85%, transparent);
}

.autoplay-box {
  display: grid;
  gap: var(--rail-stone-gap);
  padding: var(--rail-stone-gap);
  border: 1px solid color-mix(in srgb, var(--ink) 14%, transparent);
  border-radius: 16px;
  background: color-mix(in srgb, var(--surface) 84%, var(--control-bg));
  backdrop-filter: blur(14px);
  box-shadow: 0 16px 32px color-mix(in srgb, var(--ink) 9%, transparent);
}

.cpu-controls-panel {
  width: 100%;
}

.autoplay-title {
  margin: 0;
  color: var(--muted);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.autoplay-controls {
  display: grid;
  align-items: center;
  gap: var(--rail-stone-gap);
  grid-template-columns: repeat(2, minmax(0, 1fr));
  justify-content: stretch;
  justify-items: center;
}

.computer-icon {
  position: relative;
  display: block;
  width: 22px;
  height: 15px;
  border: 2px solid currentColor;
  border-radius: 4px;
}

.computer-icon::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -7px;
  width: 10px;
  height: 2px;
  background: currentColor;
  transform: translateX(-50%);
}

.computer-icon::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -11px;
  width: 18px;
  height: 2px;
  background: currentColor;
  transform: translateX(-50%);
}

.auto-count-control {
  display: grid;
  grid-column: 1 / -1;
  gap: 4px;
  padding: 4px 6px;
  border: 0;
  border-radius: 12px;
  background: transparent;
  color: var(--muted);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-align: left;
}

.auto-count-control input {
  width: 62px;
  padding: 6px 8px;
  text-align: left;
}

.auto-strength-control {
  grid-column: 1 / -1;
  width: 100%;
  display: grid;
  gap: 4px;
  color: var(--muted);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-align: left;
}

.auto-strength-control span {
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  gap: 8px;
}

.auto-strength-control strong {
  color: var(--ink);
  font-weight: 700;
  min-width: 2.2ch;
  text-align: right;
}

.auto-strength-control input[type="range"] {
  width: 100%;
  accent-color: var(--ink);
}

.board-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 4px 6px;
}

.board-display-box {
  width: 100%;
  display: grid;
  grid-template-columns: 1fr;
  justify-items: stretch;
  align-items: start;
  gap: 8px;
  padding: var(--rail-stone-gap);
  border: 1px solid color-mix(in srgb, var(--ink) 12%, transparent);
  border-radius: 16px;
  background: color-mix(in srgb, var(--surface) 86%, transparent);
  backdrop-filter: blur(14px);
  box-shadow: 0 16px 32px color-mix(in srgb, var(--ink) 9%, transparent);
  margin-top: 0;
}

.board-export-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--rail-stone-gap);
  margin-top: 0;
}

.mini-pill-button {
  border: 1px solid rgba(127, 127, 127, 0.36);
  border-radius: 999px;
  background: var(--control-bg);
  color: var(--control-text);
  font: inherit;
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 6px 8px;
  cursor: pointer;
}

.board-notation-control {
  display: grid;
  gap: 4px;
  color: var(--muted);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 0;
  padding: 0;
  text-align: left;
}

.board-notation-control select {
  width: 100%;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--control-bg);
  color: var(--control-text);
  font: inherit;
  font-size: 0.68rem;
  padding: 6px 10px;
}

.score-summary-box {
  position: absolute;
  left: var(--board-stage-offset);
  bottom: 0;
  width: min(var(--board-stage-size), calc(100% - var(--board-stage-offset)));
  max-width: calc(100% - var(--board-stage-offset));
  margin: 0;
  display: grid;
  gap: 4px;
  padding: 8px 10px;
  min-height: 74px;
  border: 1px solid transparent;
  border-radius: 12px;
  background: transparent;
  color: var(--ink);
  overflow-wrap: anywhere;
  visibility: hidden;
  z-index: 24;
}

.score-summary-box.is-visible {
  border-color: rgba(127, 127, 127, 0.28);
  background: color-mix(in srgb, var(--surface) 84%, transparent);
  visibility: visible;
}

.score-summary-line {
  margin: 0;
  font-size: 0.72rem;
  line-height: 1.35;
  color: var(--muted);
}

.score-summary-result {
  color: var(--ink);
  font-weight: 700;
}

.board-toggle input[type="checkbox"] {
  width: 14px;
  height: 14px;
  accent-color: #111111;
}

.cloud-column {
  position: relative;
  min-width: 0;
  z-index: 1;
}

.cloud-panel {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto auto;
  gap: 8px;
  min-height: 0;
  width: 100%;
}

.cloud-toolbar {
  display: none;
}

.tree-jump-dock {
  position: absolute;
  top: 12px;
  left: 12px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  z-index: 4;
}

.tree-jump-btn {
  min-height: 30px;
  font-size: 0.58rem;
  padding: 6px 10px;
}

.branch-end-control {
  display: inline-flex;
  align-items: stretch;
}

.tree-end-main {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
  border-right: 0;
}

.tree-end-cycle-btn {
  width: 22px;
  border: 1px solid rgba(127, 127, 127, 0.36);
  border-left: 0;
  background: var(--control-bg);
  color: var(--control-text);
  font: inherit;
  font-size: 0.62rem;
  padding: 0;
  cursor: pointer;
}

#tree-end-next-btn {
  border-radius: 0 999px 999px 0;
}

.tree-controls {
  display: grid;
  gap: 8px;
  padding: 2px 10px 12px;
}

.tree-control {
  display: grid;
  gap: 4px;
  min-width: 0;
  color: var(--muted);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.tree-control input,
.tree-control select {
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--control-bg);
  color: var(--control-text);
  font: inherit;
  padding: 9px 12px;
}

.tree-control input[type="range"] {
  padding: 0;
  width: 110px;
  accent-color: currentColor;
}

.tree-control-toggle {
  min-width: 76px;
}

.tree-control-toggle input[type="checkbox"] {
  width: 18px;
  height: 18px;
  padding: 0;
  border-radius: 4px;
  accent-color: var(--ink);
  background: transparent;
}

.tree-tip {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 2px 4px 0;
}

.arrow-keys {
  display: inline-flex;
  gap: 4px;
}

.arrow-key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  border-radius: 6px;
  border: 1px solid rgba(17, 17, 17, 0.18);
  background: var(--control-bg);
  color: var(--ink);
  font-size: 0.72rem;
  line-height: 1;
}

.pill-button {
  border: 1px solid color-mix(in srgb, var(--button-strong-border) 78%, var(--surface));
  border-radius: 999px;
  background: color-mix(in srgb, var(--button-strong-bg) 72%, var(--surface));
  color: var(--button-strong-text);
  padding: 10px 16px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  box-shadow: none;
  transition: transform 120ms ease, box-shadow 120ms ease;
}

.pill-button:disabled {
  opacity: 0.55;
  cursor: wait;
}

#analyze-btn {
  color: var(--button-label-light);
}

.cloud-stage-wrap {
  position: relative;
  min-height: 0;
  height: 100%;
}

.tree-popout-panel {
  position: absolute;
  top: 54px;
  right: 82px;
  width: 44px;
  max-height: 44px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  backdrop-filter: none;
  z-index: 4;
  overflow: hidden;
  transition:
    max-height 240ms cubic-bezier(0.2, 0, 0, 1),
    width 260ms cubic-bezier(0.2, 0, 0, 1) 140ms,
    border-radius 260ms cubic-bezier(0.2, 0, 0, 1) 140ms,
    border-color 180ms ease,
    background-color 180ms ease;
}

.tree-popout-panel summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  width: 44px;
  height: 44px;
  margin: 0 0 0 auto;
  padding: 0;
  cursor: pointer;
  border: 1px solid rgba(127, 127, 127, 0.24);
  border-radius: 999px;
  background: var(--surface);
  backdrop-filter: blur(2px);
  color: var(--muted);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.tree-popout-panel summary::-webkit-details-marker {
  display: none;
}

.popout-arrow {
  display: inline-block;
  font-size: 1.48rem;
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
  transition: transform 360ms cubic-bezier(0.22, 1, 0.36, 1);
}

.tree-popout-panel[open] .popout-arrow {
  transform: rotate(90deg);
}

.tree-popout-panel[open] {
  width: min(300px, calc(100% - 24px));
  max-height: min(520px, calc(100% - 20px));
  border: 1px solid rgba(127, 127, 127, 0.24);
  border-radius: 14px;
  background: var(--surface);
  backdrop-filter: blur(2px);
  overflow: hidden;
  transition:
    width 300ms cubic-bezier(0.22, 1, 0.36, 1),
    max-height 380ms cubic-bezier(0.22, 1, 0.36, 1) 240ms,
    border-radius 300ms cubic-bezier(0.22, 1, 0.36, 1),
    border-color 180ms ease,
    background-color 180ms ease;
}

.tree-popout-panel[open] summary {
  width: 100%;
  height: auto;
  margin: 0;
  justify-content: flex-end;
  padding: 10px 12px;
  border: 0;
  border-radius: 0;
  background: transparent;
  backdrop-filter: none;
}

.tree-popout-panel .tree-controls {
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  transition: opacity 220ms ease, transform 420ms cubic-bezier(0.22, 1, 0.36, 1);
}

.tree-popout-panel[open] .tree-controls {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
  transition-delay: 130ms;
}

.cloud-stage {
  height: 100%;
  border: 0;
  border-radius: 0;
  background: transparent;
  min-height: 0;
  width: 100%;
}

.suggest-dock {
  position: absolute;
  left: 12px;
  bottom: 12px;
  display: grid;
  gap: 8px;
  width: min(260px, calc(100% - 24px));
  padding: 10px 12px;
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid rgba(127, 127, 127, 0.24);
  backdrop-filter: blur(3px);
  z-index: 3;
}

.suggest-slider {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.node-notch-slider {
  --node-size: 14px;
  position: relative;
  height: 20px;
  display: block;
}

.node-notch-line,
.node-notch-marks {
  position: absolute;
  left: calc(var(--node-size) / 2);
  right: calc(var(--node-size) / 2);
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
}

.node-notch-line {
  height: 2px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--ink) 28%, transparent);
}

.node-notch-marks {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 10px;
}

.node-notch-marks span {
  width: 1px;
  height: 8px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--ink) 50%, transparent);
}

.suggest-slider input[type="range"] {
  position: absolute;
  inset: 0;
  width: 100%;
  margin: 0;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  cursor: pointer;
}

.suggest-slider input[type="range"]::-webkit-slider-runnable-track {
  height: 2px;
  background: transparent;
}

.suggest-slider input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: var(--node-size);
  height: var(--node-size);
  border-radius: 999px;
  margin-top: calc((2px - var(--node-size)) / 2);
  border: 1px solid var(--ink);
  background: var(--ink);
  box-shadow: none;
}

.suggest-slider input[type="range"]::-moz-range-track {
  height: 2px;
  background: transparent;
  border: 0;
}

.suggest-slider input[type="range"]::-moz-range-thumb {
  width: var(--node-size);
  height: var(--node-size);
  border-radius: 999px;
  border: 1px solid var(--ink);
  background: var(--ink);
  box-shadow: none;
}


.advanced-panel {
  border: 0;
  border-radius: 22px;
  background: transparent;
  padding: 14px 16px;
}

.advanced-panel summary {
  cursor: pointer;
  font-weight: 600;
}

.advanced-fields {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

.advanced-field {
  display: grid;
  gap: 6px;
  font-size: 0.66rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.advanced-field span {
  display: block;
}

.advanced-panel input,
.advanced-panel select {
  margin-top: 12px;
}

.advanced-field input,
.advanced-field select {
  margin-top: 0;
}

.advanced-panel input:disabled,
.advanced-panel select:disabled {
  opacity: 0.56;
  cursor: not-allowed;
}

.advanced-copy {
  margin-top: 10px;
  font-size: 0.92rem;
}

@media (max-width: 1100px) {
  .layout {
    grid-template-columns: 1fr;
    grid-template-rows: minmax(0, 1fr) minmax(360px, 44vh);
  }

  .board-panel {
    grid-template-rows: auto minmax(0, 1fr) auto;
    gap: 6px;
  }

  .cloud-column {
    position: static;
    min-height: 0;
  }

  .board-stage {
    width: min(100%, 760px);
    height: auto;
    min-width: 0;
    max-height: min(62dvh, 760px);
  }

  .board-main-area {
    width: 100%;
    min-height: min(62dvh, 760px);
    height: auto;
  }

  .board-display-box {
    width: 100%;
  }

  .score-summary-box {
    position: static;
    width: 100%;
    max-width: 100%;
    margin: 8px 0 0 0;
  }

  .board-status-box {
    position: static;
    width: 100%;
    pointer-events: auto;
  }
}

@media (max-width: 720px) {
  .app-shell {
    padding: 0 8px 8px;
  }

  .panel-row,
  .cloud-toolbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .top-controls {
    width: 100%;
    justify-content: flex-start;
  }

  .appearance-controls,
  .palette-picker {
    width: auto;
  }

  .appearance-controls {
    flex-direction: row;
    align-items: center;
    gap: 8px;
  }

  .mode-toggle {
    width: auto;
    justify-content: flex-start;
  }

  .palette-menu {
    flex-wrap: wrap;
  }

  .palette-picker.open .palette-menu {
    max-width: calc(100vw - 26px);
  }

  .suggest-dock {
    left: 8px;
    right: 8px;
    bottom: 8px;
    width: auto;
  }

  .tree-popout-panel {
    top: 8px;
    right: 8px;
    left: auto;
    width: 44px;
    height: 44px;
  }

  .tree-popout-panel[open] {
    left: 8px;
    right: 8px;
    width: auto;
    top: 8px;
    height: auto;
  }

  .tree-jump-dock {
    top: 8px;
    left: 8px;
    gap: 6px;
  }

  .board-main-area {
    display: grid;
    grid-template-columns: 1fr;
    align-items: start;
    min-height: 0;
    height: auto;
    padding-left: 0;
  }

  .control-rail {
    display: flex;
    position: static;
    inset: auto;
    transform: none;
    order: 2;
    height: auto;
    width: 100%;
    flex-direction: row;
    align-items: flex-start;
    justify-content: center;
    flex-wrap: wrap;
    border: 0;
    border-radius: 0;
    background: transparent;
    padding: 0;
    overflow: visible;
  }

  .control-rail > :not(.rail-toggle-btn) {
    opacity: 1 !important;
    filter: none !important;
    transform: none !important;
    pointer-events: auto !important;
  }

  .rail-toggle-btn {
    display: none;
  }

  .board-stage {
    order: 1;
  }

  .play-controls {
    width: auto;
    max-width: 100%;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
  }

  .board-display-box {
    margin-top: 0;
  }

  .stone-size-picker {
    width: auto;
    min-width: 88px;
  }

  .cpu-controls-panel {
    width: auto;
  }

  .sgf-library-menu {
    left: 50%;
    right: auto;
    top: 50%;
    bottom: auto;
    transform: translate(-50%, -50%);
    width: min(92vw, 520px);
    max-height: min(84vh, 760px);
  }

  .autoplay-controls {
    grid-template-columns: repeat(2, minmax(0, 56px));
  }

  .stone-button {
    width: 56px;
    height: 56px;
  }

  .board-stage {
    width: 100%;
    min-height: min(92vw, 52dvh);
    max-height: min(92vw, 52dvh);
  }

  .board-status-box .status-text {
    padding-left: 0;
  }

  .cloud-stage {
    min-height: 320px;
  }
}