:root {
  color-scheme: light;
  --bg: #f6f7f3;
  --surface: #ffffff;
  --surface-strong: #f1f3ed;
  --ink: #20251f;
  --muted: #6d7669;
  --line: #d9dfd3;
  --accent: #6a8d42;
  --accent-strong: #466226;
  --warn: #9f3a2f;
  --page-tint: rgb(246 247 243 / 96%);
  --page-pattern: rgb(115 149 82 / 6%);
  --drop-hover: #eaf4ef;
  --light-square: #ebecd0;
  --dark-square: #739552;
  --variant-surface: #fbfcf8;
  --variant-line: #b9caa4;
  --variant-ink: var(--accent-strong);
  --shadow: 0 18px 40px rgb(27 42 31 / 12%);
  --coord-size: 18px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
  print-color-adjust: exact;
  -webkit-print-color-adjust: exact;
}

html {
  overflow-y: scroll;
  scrollbar-gutter: stable both-edges;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgb(255 255 255 / 86%), var(--page-tint)),
    repeating-linear-gradient(45deg, var(--page-pattern) 0 16px, transparent 16px 32px);
}

body.board-blue {
  --bg: #f3f7fb;
  --surface-strong: #edf4fa;
  --muted: #667889;
  --line: #d3e0eb;
  --accent: #4d7fa9;
  --accent-strong: #2f5d82;
  --page-tint: rgb(243 247 251 / 96%);
  --page-pattern: rgb(77 127 169 / 7%);
  --drop-hover: #e8f2fa;
  --light-square: #dee9f4;
  --dark-square: #5b87ad;
  --variant-surface: #f3f8fc;
  --variant-line: #9ebbd3;
  --variant-ink: #2f5d82;
}

body.board-gray {
  --bg: #f5f5f3;
  --surface-strong: #eeeeeb;
  --muted: #686863;
  --line: #d5d5cf;
  --accent: #555555;
  --accent-strong: #242424;
  --page-tint: rgb(245 245 243 / 96%);
  --page-pattern: rgb(0 0 0 / 5%);
  --drop-hover: #eeeeeb;
  --light-square: #f2f2ee;
  --dark-square: #9c9c96;
  --variant-surface: #f8f8f5;
  --variant-line: #b8b8b0;
  --variant-ink: #242424;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  width: min(1440px, 100%);
  margin: 0 auto;
  padding: 32px;
}

.page-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
}

.settings-anchor {
  position: relative;
  flex: 0 0 auto;
  margin-right: 16px;
}

.page-settings-button {
  width: 36px;
  height: 36px;
}

.page-settings-button.is-active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--surface-strong);
}

.settings-popover {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 20;
  width: min(320px, calc(100vw - 32px));
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.settings-popover[hidden] {
  display: none !important;
}

.settings-popover-title {
  margin: 0 0 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 0.95rem;
  font-weight: 800;
}

.settings-popover-section + .settings-popover-section {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.settings-popover-section {
  display: grid;
  gap: 10px;
  overflow: visible;
}

.settings-popover-section h3 {
  margin: 0 0 8px;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.settings-popover-section .settings-popover-field {
  width: 100%;
}

.settings-popover-field.control-field {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  min-width: 0;
  white-space: normal;
}

.settings-popover-field > span {
  flex: 1 1 0;
  min-width: 0;
  white-space: normal;
  line-height: 1.25;
}

.settings-popover-field select,
.settings-popover-field .custom-select {
  width: 168px;
  min-width: 168px;
  max-width: 168px;
  flex-shrink: 0;
}

.settings-popover-divider {
  margin: 14px 0 10px;
  border-top: 1px solid var(--line);
}

.settings-popover-reset {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 6px;
  border: 0;
  border-radius: 6px;
  color: var(--accent);
  background: transparent;
  font-size: 0.92rem;
  font-weight: 650;
  text-align: left;
}

.settings-popover-reset svg {
  display: block;
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.settings-popover-reset:hover {
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}

.settings-popover-reset:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.hero {
  padding: 12px 0 28px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 12px;
  font-size: clamp(2.4rem, 7vw, 5.4rem);
  line-height: 0.96;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: 1rem;
}

.intro {
  max-width: 680px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.06rem;
  line-height: 1.55;
}

.summary {
  display: grid;
  align-content: center;
  min-width: 160px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.summary span {
  color: var(--muted);
  font-size: 0.88rem;
}

.summary strong {
  margin-top: 4px;
  font-size: 1.45rem;
}

.summary strong + span {
  display: block;
  margin-top: 4px;
}

.toolbar {
  margin-bottom: 18px;
}

.toolbar-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: stretch;
}


.file-drop {
  display: flex;
  gap: 14px;
  align-items: center;
  min-height: 86px;
  padding: 18px;
  border: 1px dashed var(--accent);
  border-radius: 8px;
  background: rgb(255 255 255 / 82%);
  cursor: pointer;
}

.file-drop.dragover {
  background: var(--drop-hover);
  border-style: solid;
}

.file-drop input {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.upload-icon {
  display: grid;
  place-items: center;
  flex: 0 0 42px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  color: white;
  background: var(--accent);
  font-size: 1.6rem;
  line-height: 1;
  padding-bottom: 3px;
}

.file-drop strong,
.file-drop small {
  display: block;
}

.file-drop small {
  margin-top: 4px;
  color: var(--muted);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: flex-end;
  align-items: center;
  padding: 12px;
  border-radius: 8px;
  background: var(--surface);
  border: 1px solid var(--line);
}

.secondary {
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: var(--surface-strong);
}

.secondary:hover {
  border-color: var(--accent);
}

.control-field {
  display: inline-flex;
  flex-direction: column;
  gap: 5px;
  align-items: flex-start;
  white-space: nowrap;
  cursor: pointer;
  overflow: visible;
}

.control-field > span {
  color: color-mix(in srgb, var(--ink) 45%, var(--muted));
  font-size: 0.72rem;
  font-weight: 800;
  line-height: 1;
}

.control-field select {
  min-width: 112px;
  min-height: 34px;
  appearance: none;
  padding: 0 32px 0 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--muted);
  background:
    linear-gradient(45deg, transparent 50%, var(--muted) 50%) right 13px center / 5px 5px no-repeat,
    linear-gradient(135deg, var(--muted) 50%, transparent 50%) right 8px center / 5px 5px no-repeat,
    var(--surface);
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 400;
}

.custom-select {
  position: relative;
  min-width: 112px;
}

.custom-select.is-open {
  z-index: 31;
}

.custom-select-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 36px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--muted);
  background: var(--surface);
  cursor: pointer;
  font: inherit;
  font-size: 0.84rem;
  font-weight: 400;
  line-height: 1.3;
  text-align: left;
}

.custom-select.is-open .custom-select-trigger {
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
  border-bottom-color: transparent;
  color: var(--ink);
  background: var(--surface);
}

.custom-select-value {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 400;
  color: inherit;
}

.custom-select-chevron {
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-left: 8px;
  color: var(--muted);
}

.custom-select-native {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.custom-select-list {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 32;
  display: none;
  margin: 0;
  padding: 6px;
  list-style: none;
  border: 1px solid var(--line);
  border-top: 0;
  border-radius: 0 0 8px 8px;
  background: var(--surface);
  box-shadow: 0 10px 24px rgb(27 42 31 / 10%);
  max-height: 220px;
  overflow-y: auto;
  overflow-x: hidden;
}

.custom-select.is-open .custom-select-list {
  display: block;
}

.custom-select-option {
  padding: 9px 10px;
  border-radius: 6px;
  color: var(--ink);
  font-size: 0.84rem;
  font-weight: 400;
  line-height: 1.35;
  cursor: pointer;
}

.custom-select-option:hover {
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}

.custom-select-option.is-selected {
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  color: var(--accent-strong);
}

.custom-select-option.is-active {
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}

.custom-select-option.is-selected.is-active {
  background: color-mix(in srgb, var(--accent) 14%, transparent);
}

.custom-select-option.is-selected:hover {
  background: color-mix(in srgb, var(--accent) 14%, transparent);
}

.control-field select:hover {
  border-color: var(--line);
  color: var(--ink);
  background:
    linear-gradient(45deg, transparent 50%, var(--muted) 50%) right 13px center / 5px 5px no-repeat,
    linear-gradient(135deg, var(--muted) 50%, transparent 50%) right 8px center / 5px 5px no-repeat,
    var(--drop-hover);
}

.custom-select-trigger:hover {
  border-color: var(--line);
  color: var(--ink);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}

.control-field select:focus {
  border-color: var(--accent);
  color: var(--ink);
  background:
    linear-gradient(45deg, transparent 50%, var(--muted) 50%) right 13px center / 5px 5px no-repeat,
    linear-gradient(135deg, var(--muted) 50%, transparent 50%) right 8px center / 5px 5px no-repeat,
    var(--surface);
  outline: 0;
}

.custom-select-trigger:focus-visible {
  border-color: var(--accent);
  color: var(--ink);
  background: var(--surface);
  outline: 0;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 12%, transparent);
}

.custom-select.is-open .custom-select-trigger {
  border-color: var(--accent);
  color: var(--ink);
  background: var(--surface);
  outline: 0;
  box-shadow: none;
}

.message {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 18px;
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid rgb(159 58 47 / 35%);
  color: var(--warn);
  background: rgb(159 58 47 / 8%);
}

.message[hidden] {
  display: none !important;
}

.message.is-warning {
  border-color: rgb(30 111 92 / 35%);
  color: var(--accent-strong);
  background: rgb(30 111 92 / 9%);
}

.message-body {
  flex: 1;
  min-width: 0;
}

.message-title {
  display: block;
  margin-bottom: 4px;
  font-size: 0.95rem;
  font-weight: 800;
  line-height: 1.35;
}

.message-detail,
.message-note {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.45;
}

.message-note {
  margin-top: 6px;
  color: inherit;
  opacity: 0.88;
}

.message-close {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  margin: -2px -2px 0 0;
  padding: 0;
  border: 0;
  border-radius: 6px;
  color: inherit;
  background: transparent;
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
}

.message-close:hover {
  background: rgb(0 0 0 / 6%);
}

.message-close:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 2px;
}

.workspace {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.game-list,
.positions {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgb(255 255 255 / 86%);
  box-shadow: var(--shadow);
}

.positions {
  min-height: 260px;
}

.game-list {
  position: sticky;
  top: 18px;
  overflow: hidden;
}

.panel-heading {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  min-height: 54px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}

.panel-heading span {
  color: var(--muted);
  font-size: 0.88rem;
  text-align: right;
}

.positions-header-meta {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  min-width: 0;
}

.positions-header-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.positions-action-button svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.page-settings-button svg {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

#toggleVariants .variant-icon-collapse {
  display: none;
}

#toggleVariants.is-variants-expanded .variant-icon-expand {
  display: none;
}

#toggleVariants.is-variants-expanded .variant-icon-collapse {
  display: block;
}

.positions-action-button {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--muted);
}

.positions-action-button:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.positions-action-button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.positions-action-button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

#games {
  display: grid;
  gap: 6px;
  padding: 10px;
}

.game-button {
  width: 100%;
  padding: 12px;
  border: 1px solid transparent;
  border-radius: 8px;
  text-align: left;
  color: var(--ink);
  background: transparent;
}

.game-button:hover,
.game-button.active {
  border-color: var(--line);
  background: var(--surface-strong);
}

.game-button strong,
.game-button span {
  display: block;
}

.game-button span {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.84rem;
}

.positions {
  padding-bottom: 16px;
  overflow-x: hidden;
}

.position-grid {
  --positions-per-row: 5;
  --grid-gap: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 16px;
  min-width: 0;
}

body.positions-per-row-2 .position-grid {
  --positions-per-row: 2;
}

body.positions-per-row-3 .position-grid {
  --positions-per-row: 3;
}

body.positions-per-row-4 .position-grid {
  --positions-per-row: 4;
}

body.positions-per-row-5 .position-grid {
  --positions-per-row: 5;
}

.position-line {
  --grid-gap: 16px;
  display: grid;
  grid-template-columns: repeat(var(--positions-per-row), minmax(0, var(--position-cell-width, 1fr)));
  grid-auto-flow: row;
  gap: var(--grid-gap);
  width: 100%;
  min-width: 0;
}

.position-card {
  container-type: inline-size;
  min-width: 0;
  width: 100%;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.position-card.variant-card {
  border-color: var(--variant-line);
  border-style: dashed;
  background: var(--variant-surface);
}

.position-card.variant-card .position-meta strong {
  color: var(--variant-ink);
  font-style: italic;
}

.position-card.has-variants {
  cursor: pointer;
}

.position-card.has-variants:hover {
  border-color: var(--accent);
}

.position-card.has-variants:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.variant-toggle {
  flex: 0 0 auto;
  min-height: 24px;
  padding: 0 8px;
  border: 1px solid var(--variant-line);
  border-radius: 999px;
  background: var(--variant-surface);
  color: var(--variant-ink);
  font-size: 0.72rem;
  font-weight: 800;
  line-height: 1;
  white-space: nowrap;
}

.variant-toggle-label {
  display: none;
}

.variant-toggle.is-expanded-label .variant-toggle-label {
  display: inline;
}

.position-card.variant-card .variant-toggle {
  background: var(--surface);
}

.variant-toggle::before {
  content: "+";
  display: inline-block;
  margin-right: 5px;
}

.position-card.is-open .variant-toggle::before {
  content: "-";
}

.variation-accordion {
  display: none;
  --variant-block-padding: 10px;
  --variant-indent-step: 36px;
  box-sizing: border-box;
  max-width: 100%;
}

.position-line.main-line {
  width: 100%;
}

.variation-accordion .position-line {
  display: flex;
  flex-wrap: wrap;
  gap: var(--grid-gap);
  width: var(--variant-line-width, fit-content);
  max-width: var(--variant-line-max-width, 100%);
  min-width: 0;
  padding: 0;
  border: none;
  background: transparent;
  box-sizing: border-box;
}

.variation-accordion .position-line > .position-card {
  flex: 0 0 var(--position-cell-width);
  width: var(--position-cell-width);
  min-width: 0;
  box-sizing: border-box;
}

.variation-accordion.is-open {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  align-self: flex-start;
  gap: var(--grid-gap);
  width: fit-content;
  max-width: var(--variant-block-max-width, 100%);
  min-width: 0;
  padding: var(--variant-block-padding);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--current-variant-surface, var(--variant-surface));
  box-sizing: border-box;
}

.variation-accordion.variant-tone-themed {
  --current-variant-surface: var(--variant-surface);
}

.variation-accordion.variant-tone-main {
  --current-variant-surface: var(--surface);
}

.position-grid > .variation-accordion.is-open {
  margin-left: var(--variant-indent-step);
}

.variation-accordion.is-open .position-line > .position-card.variant-card {
  border: 1px dashed var(--variant-line);
  border-radius: 8px;
  background: var(--current-variant-surface, var(--variant-surface));
}

.variation-accordion .variation-accordion.is-open {
  margin-left: var(--variant-indent-step);
  max-width: calc(100% - var(--variant-indent-step));
}

.board-wrap {
  width: 100%;
  max-width: 100%;
  margin-inline: auto;
}

.board-frame {
  --coord-size: clamp(12px, 9cqi, 24px);
  display: grid;
  grid-template-columns: var(--coord-size) minmax(0, 1fr) var(--coord-size);
  grid-template-rows: var(--coord-size) minmax(0, 1fr) var(--coord-size);
  width: 100%;
  margin-inline: auto;
  background: transparent;
}

.board {
  position: relative;
  display: grid;
  grid-template-columns: repeat(8, 12.5%);
  grid-template-rows: repeat(8, 12.5%);
  min-width: 0;
  width: 100%;
  aspect-ratio: 1;
  grid-column: 2;
  grid-row: 2;
  border-radius: 2px;
  overflow: hidden;
  background: var(--light-square);
}

.square {
  position: relative;
  display: grid;
  place-items: center;
  min-width: 0;
  min-height: 0;
  aspect-ratio: auto;
  overflow: hidden;
  user-select: none;
}

.square.dark {
  background: var(--dark-square);
}

.square.light {
  background: var(--light-square);
}

.move-arrows-overlay {
  position: absolute;
  inset: 0;
  z-index: 3;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: visible;
  shape-rendering: geometricPrecision;
}

.coords {
  display: grid;
  color: #6b735f;
  font-size: clamp(0.5rem, 4.8cqi, 0.72rem);
  font-weight: 800;
  line-height: 1;
}

.coords.files {
  grid-column: 2;
  grid-template-columns: repeat(8, 1fr);
  align-items: center;
  justify-items: center;
}

.coords.files:first-child {
  grid-row: 1;
}

.coords.files:last-child {
  grid-row: 3;
}

.coords.ranks {
  grid-row: 2;
  grid-template-rows: repeat(8, 1fr);
  align-items: center;
  justify-items: center;
}

.coords.ranks:nth-child(2) {
  grid-column: 1;
}

.coords.ranks:nth-child(4) {
  grid-column: 3;
}

.piece {
  display: block;
  min-width: 0;
  width: 94%;
  height: 94%;
  object-fit: contain;
  filter: drop-shadow(0 2px 1px rgb(0 0 0 / 18%));
  position: relative;
  z-index: 2;
  pointer-events: none;
}

.piece.white[data-piece="p"] {
  background-image: url("https://lichess1.org/assets/piece/cburnett/wP.svg");
}

.piece.white[data-piece="n"] {
  background-image: url("https://lichess1.org/assets/piece/cburnett/wN.svg");
}

.piece.white[data-piece="b"] {
  background-image: url("https://lichess1.org/assets/piece/cburnett/wB.svg");
}

.piece.white[data-piece="r"] {
  background-image: url("https://lichess1.org/assets/piece/cburnett/wR.svg");
}

.piece.white[data-piece="q"] {
  background-image: url("https://lichess1.org/assets/piece/cburnett/wQ.svg");
}

.piece.white[data-piece="k"] {
  background-image: url("https://lichess1.org/assets/piece/cburnett/wK.svg");
}

.piece.black[data-piece="p"] {
  background-image: url("https://lichess1.org/assets/piece/cburnett/bP.svg");
}

.piece.black[data-piece="n"] {
  background-image: url("https://lichess1.org/assets/piece/cburnett/bN.svg");
}

.piece.black[data-piece="b"] {
  background-image: url("https://lichess1.org/assets/piece/cburnett/bB.svg");
}

.piece.black[data-piece="r"] {
  background-image: url("https://lichess1.org/assets/piece/cburnett/bR.svg");
}

.piece.black[data-piece="q"] {
  background-image: url("https://lichess1.org/assets/piece/cburnett/bQ.svg");
}

.piece.black[data-piece="k"] {
  background-image: url("https://lichess1.org/assets/piece/cburnett/bK.svg");
}

.position-meta {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: space-between;
  margin-top: 10px;
}

.position-meta strong {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.position-card code {
  display: none;
  margin-top: 8px;
  padding: 8px;
  overflow-wrap: anywhere;
  border-radius: 6px;
  color: var(--muted);
  background: #f4f6f2;
  font-size: 0.74rem;
  line-height: 1.45;
}

@media (max-width: 900px) {
  .app-shell {
    padding: 20px;
  }

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

  .toolbar-top {
    grid-template-columns: 1fr;
  }

  .summary {
    width: auto;
  }

  .controls {
    justify-content: flex-start;
  }

  .game-list {
    position: static;
  }
}

@media (max-width: 520px) {
  .app-shell {
    padding: 14px;
  }

  .page-header {
    grid-template-columns: 1fr auto;
    gap: 10px;
  }

  .file-drop,
  .controls {
    align-items: flex-start;
  }

  .position-grid {
    gap: 8px;
    padding: 8px;
  }

  .position-card {
    padding: 4px;
  }
}

@page {
  size: A4 portrait;
  margin: 10mm;
}

@media print {
  body {
    background: white;
  }

  .app-shell {
    width: 100%;
    padding: 0;
  }

  .hero,
  .toolbar,
  .message,
  .game-list,
  .settings-anchor,
  .positions-header-actions,
  #positions-title,
  .position-card code,
  .variant-toggle {
    display: none !important;
  }

  .workspace,
  .positions {
    display: block;
    min-height: 0;
    border: 0;
    background: white;
    box-shadow: none;
  }

  .positions {
    padding: 0;
    overflow: visible;
  }

  .positions > .panel-heading {
    display: flex;
    min-height: 0;
    padding: 0 0 8px;
    border: 0;
  }

  .positions-header-meta {
    width: 100%;
    justify-content: flex-start;
  }

  #activeGameLabel {
    text-align: left;
    font-size: 10pt;
  }

  .position-grid {
    display: flex;
    flex-direction: column;
    gap: var(--grid-gap);
    width: 100%;
    padding: 0;
    min-width: 0;
  }

  .position-line {
    display: grid;
    grid-template-columns: repeat(var(--positions-per-row), minmax(0, var(--position-cell-width)));
    grid-auto-flow: row;
    gap: var(--grid-gap);
    width: 100%;
    min-width: 0;
  }

  .position-line.main-line {
    width: 100%;
  }

  .position-card {
    break-inside: avoid;
    page-break-inside: avoid;
    width: 100%;
    padding: 6px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--surface);
  }

  .position-card.variant-card {
    border-color: var(--variant-line);
    border-style: dashed;
    background: var(--variant-surface);
  }

  .variation-accordion,
  .variation-accordion.is-open {
    display: flex !important;
    flex-direction: column;
    align-items: flex-start;
    align-self: flex-start;
    gap: var(--grid-gap);
    width: var(--variant-block-width, auto) !important;
    max-width: var(--variant-block-max-width, 100%);
    min-width: 0;
    padding: var(--variant-block-padding);
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--current-variant-surface, var(--variant-surface));
    box-sizing: border-box;
    overflow: visible;
  }

  .position-grid > .variation-accordion,
  .position-grid > .variation-accordion.is-open {
    margin-left: var(--variant-indent-step);
  }

  .variation-accordion .variation-accordion,
  .variation-accordion .variation-accordion.is-open {
    margin-left: var(--variant-indent-step);
    max-width: calc(100% - var(--variant-indent-step));
  }

  .variation-accordion .position-line {
    display: flex !important;
    flex-wrap: wrap;
    gap: var(--grid-gap);
    width: var(--variant-line-width, fit-content);
    max-width: var(--variant-line-max-width, 100%);
    min-width: 0;
    padding: 0;
    border: none;
    background: transparent;
    box-sizing: border-box;
  }

  .variation-accordion .position-line > .position-card {
    flex: 0 0 var(--position-cell-width);
    width: var(--position-cell-width);
    min-width: 0;
    box-sizing: border-box;
  }

  .variation-accordion .position-line > .position-card.variant-card {
    border: 1px dashed var(--variant-line);
    border-radius: 8px;
    background: var(--current-variant-surface, var(--variant-surface));
  }

  .board-frame {
    --coord-size: 3.2mm;
  }

  .coords {
    font-size: 5.5pt;
  }

  .board {
    background: var(--light-square);
  }

  .square.light {
    background-color: var(--light-square);
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }

  .square.dark {
    background-color: var(--dark-square);
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }

  .move-arrows-overlay,
  .move-arrows-overlay path,
  .move-arrows-overlay circle {
    display: block !important;
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }

  .square {
    overflow: hidden;
  }

  .piece {
    filter: none;
  }

  .position-meta {
    margin-top: 6px;
    padding-inline: 0;
    justify-content: space-between;
    font-size: 7pt;
  }

  .position-meta strong {
    overflow: visible;
    text-overflow: clip;
    white-space: nowrap;
  }
}

body.is-printing .move-arrows-overlay,
body.is-printing .move-arrows-overlay path,
body.is-printing .move-arrows-overlay circle {
  display: block !important;
  print-color-adjust: exact;
  -webkit-print-color-adjust: exact;
}

body.is-printing .square {
  overflow: hidden;
}

.confirm-dialog {
  border: 0;
  padding: 0;
  background: transparent;
  max-width: min(420px, calc(100vw - 32px));
  color: var(--ink);
}

.confirm-dialog::backdrop {
  background: rgb(32 37 31 / 42%);
}

.confirm-dialog-panel {
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.confirm-dialog-title {
  margin: 0 0 10px;
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1.3;
}

.confirm-dialog-message {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.confirm-dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.confirm-dialog-button {
  min-height: 36px;
  padding: 0 14px;
  border-radius: 6px;
  font-weight: 650;
}

.confirm-dialog-button-secondary {
  border: 1px solid var(--line);
  background: var(--surface-strong);
  color: var(--ink);
}

.confirm-dialog-button-secondary:hover {
  border-color: var(--accent);
}

.confirm-dialog-button-primary {
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
}

.confirm-dialog-button-primary:hover {
  border-color: var(--accent-strong);
  background: var(--accent-strong);
}

.confirm-dialog-button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}