/* Hallmark · pre-emit critique: P5 H4 E4 S5 R4 V5 · macrostructure: Workbench · tone: playful chess club · anchor hue: pear 95 · theme: Hum · nav: N7 · footer: Ft5 · contrast: pass (40–41) · slop: pass (42–45) · honest: pass (46) · chrome: pass (47) · tokens: pass (48) · responsive: pass (49) · icons: pass (30) · mobile: pass (34, 49, 50–57) */
@import url("/tokens.css");

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

html,
body {
  overflow-x: clip;
}

html {
  background: var(--color-paper);
}

body {
  min-height: 100dvh;
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.55;
  font-feature-settings: "ss01" on, "cv11" on;
}

button,
input,
select,
textarea {
  color: inherit;
  font: inherit;
}

button,
a,
select,
input,
textarea {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
}

h1,
h2,
p,
dl,
dd {
  margin: 0;
}

h1,
h2 {
  min-width: 0;
  overflow-wrap: anywhere;
  font-family: var(--font-display);
  font-style: normal;
}

h1 {
  font-size: var(--text-display);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 0.98;
}

h2 {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.hidden {
  display: none !important;
}

.club-bar {
  display: flex;
  min-height: 4.25rem;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-sm) var(--page-gutter);
  border-block-end: var(--rule-heavy) solid var(--color-ink);
  background: var(--color-paper-3);
}

.club-tools {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: var(--space-xs);
}

.language-switch {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  overflow: clip;
  border: var(--rule-hair) solid var(--color-ink);
  border-radius: var(--radius-pill);
  background: var(--color-paper);
}

.language-switch button {
  width: 2.75rem;
  min-height: 2.75rem;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  font-family: var(--font-label);
  font-size: var(--text-xs);
  font-weight: 700;
  line-height: 1;
}

.language-switch button[aria-pressed="true"] {
  background: var(--color-ink);
  color: var(--color-paper);
}

@media (hover: hover) and (pointer: fine) {
  .language-switch button:not([aria-pressed="true"]):hover {
    background: var(--color-paper-3);
  }
}

.language-switch button:focus-visible {
  position: relative;
  z-index: var(--z-raised);
  outline: 3px solid var(--color-focus);
  outline-offset: -3px;
}

.language-switch button:active {
  background: var(--color-accent-2-soft);
}

.language-switch button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.club-mark {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.035em;
  line-height: 1;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}

.club-mark__piece {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border: var(--rule-heavy) solid var(--color-ink);
  border-radius: var(--radius-pill);
  background: var(--color-paper);
  font-family: var(--font-symbol);
  font-size: var(--text-lg);
  transition: transform var(--dur-short) var(--ease-out);
}

.club-mark__long {
  display: none;
}

.club-mark__short {
  display: inline;
}

.club-mark:focus-visible {
  border-radius: var(--radius-input);
  outline: 3px solid var(--color-focus);
  outline-offset: var(--space-2xs);
}

.club-mark:hover .club-mark__piece {
  transform: rotate(-8deg);
}

.club-mark:active .club-mark__piece {
  transform: translateY(var(--space-2xs));
}

.capacity {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-label);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
}

.capacity__long {
  display: none;
}

.capacity__short {
  display: inline;
}

.capacity__dot {
  width: 0.625rem;
  height: 0.625rem;
  border: var(--rule-hair) solid var(--color-ink);
  border-radius: var(--radius-pill);
  background: var(--color-mint);
}

.capacity__dot.is-full {
  background: var(--color-accent-3);
}

.workbench {
  display: grid;
  max-width: var(--page-max);
  margin-inline: auto;
  gap: var(--space-xl);
  padding: var(--space-xl) var(--page-gutter) var(--space-2xl);
}

.board-column,
.control-column {
  min-width: 0;
}

.board-column {
  display: grid;
  align-content: start;
  gap: var(--space-md);
}

.board-intro {
  display: grid;
  gap: var(--space-sm);
}

.board-intro p {
  max-width: 48ch;
  color: var(--color-ink-soft);
}

.build-tag,
.engine-card__label,
.color-chip {
  font-family: var(--font-label);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.build-tag {
  align-self: end;
  justify-self: start;
  padding-block-end: var(--space-2xs);
  border-block-end: var(--rule-heavy) solid var(--color-accent-2);
  color: var(--color-ink);
}

.board-frame {
  overflow: clip;
  width: calc(100% + 2 * var(--page-gutter));
  max-width: 45rem;
  margin-inline: calc(var(--page-gutter) * -1);
  border: var(--rule-heavy) solid var(--color-ink);
  border-inline: 0;
  border-radius: 0;
  background: var(--color-board-dark);
  box-shadow: var(--shadow-card);
}

.board {
  display: grid;
  aspect-ratio: 1;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  grid-template-rows: repeat(8, minmax(0, 1fr));
}

.square {
  position: relative;
  display: grid;
  min-width: 0;
  min-height: 0;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: var(--color-board-light);
  cursor: default;
  isolation: isolate;
}

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

.square.can-move,
.square.is-target {
  cursor: pointer;
}

.square:disabled {
  cursor: default;
  opacity: 1;
}

.square.is-last::before,
.square.is-selected::before {
  position: absolute;
  z-index: var(--z-base);
  inset: 0;
  background: var(--color-board-last);
  content: "";
  opacity: 0.46;
}

.square.is-selected::before {
  background: var(--color-board-selected);
  opacity: 0.72;
}

.square.is-target::after {
  position: absolute;
  z-index: var(--z-raised);
  width: 24%;
  aspect-ratio: 1;
  border: var(--rule-heavy) solid var(--color-ink);
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  content: "";
  opacity: 0.8;
  pointer-events: none;
}

.square:focus-visible {
  z-index: var(--z-raised);
  outline: 3px solid var(--color-focus);
  outline-offset: -3px;
}

.piece {
  position: relative;
  z-index: var(--z-raised);
  font-family: var(--font-symbol);
  font-size: clamp(1.85rem, 8vw, 4.4rem);
  line-height: 1;
  pointer-events: none;
  transition: transform var(--dur-micro) var(--ease-out);
}

.piece.is-white {
  color: var(--color-piece-light);
  -webkit-text-stroke: var(--rule-hair) var(--color-piece-dark);
}

.piece.is-black {
  color: var(--color-piece-dark);
}

@media (hover: hover) and (pointer: fine) {
  .square.can-move:hover .piece {
    transform: translateY(calc(var(--space-2xs) * -1));
  }
}

.square:not(:disabled):active .piece {
  transform: translateY(var(--space-2xs));
}

.position-strip {
  display: flex;
  max-width: 45rem;
  min-height: 3.25rem;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border: var(--rule-heavy) solid var(--color-ink);
  border-radius: var(--radius-input);
  background: var(--color-accent-2-soft);
}

.position-strip__turn {
  font-weight: 600;
}

.position-strip__eval {
  flex: 0 0 auto;
  font-family: var(--font-label);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.control-column {
  display: grid;
  align-content: start;
  gap: var(--space-lg);
}

.panel {
  padding: var(--space-lg);
  border: var(--rule-heavy) solid var(--color-ink);
  border-radius: var(--radius-card);
  background: var(--color-paper-2);
  box-shadow: var(--shadow-card);
}

.panel__heading {
  display: grid;
  gap: var(--space-2xs);
  margin-block-end: var(--space-lg);
}

.panel__heading p,
.field__help,
.consent small,
.research-note p,
.game-heading p {
  color: var(--color-muted);
}

form,
.field,
.research-tools {
  display: grid;
}

form {
  gap: var(--space-md);
}

.field,
.research-tools {
  gap: var(--space-xs);
}

.field-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-md);
}

label {
  font-weight: 600;
}

label span {
  color: var(--color-muted);
  font-size: var(--text-sm);
  font-weight: 400;
}

label .label-main {
  color: inherit;
  font-size: inherit;
  font-weight: inherit;
}

input,
select,
textarea {
  width: 100%;
  min-height: 2.875rem;
  padding: var(--space-sm) var(--space-md);
  border: var(--rule-hair) solid var(--color-rule-strong);
  border-radius: var(--radius-input);
  outline: 2px solid transparent;
  outline-offset: 1px;
  background: var(--color-paper);
}

textarea {
  min-height: 6rem;
  resize: vertical;
}

input::placeholder,
textarea::placeholder {
  color: var(--color-muted);
  opacity: 1;
}

@media (hover: hover) and (pointer: fine) {
  input:hover,
  select:hover,
  textarea:hover {
    background: var(--color-paper-3);
  }
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  border-color: var(--color-ink);
  outline-color: var(--color-focus);
}

input:disabled,
select:disabled,
textarea:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

input[aria-invalid="true"],
textarea[aria-invalid="true"] {
  border-color: var(--color-error);
  background: var(--color-error-soft);
}

.field__help {
  min-height: 1lh;
  font-size: var(--text-sm);
}

.consent {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: var(--space-sm);
  padding: var(--space-md);
  border-radius: var(--radius-input);
  background: var(--color-accent-2-soft);
  cursor: pointer;
}

.consent input {
  width: 1.25rem;
  min-height: 1.25rem;
  margin-block-start: var(--space-2xs);
  padding: 0;
  accent-color: var(--color-focus);
}

.consent span {
  display: grid;
  gap: var(--space-2xs);
  color: var(--color-ink);
  font-size: var(--text-base);
}

.consent small {
  font-size: var(--text-sm);
  font-weight: 400;
  line-height: 1.45;
}

@media (hover: hover) and (pointer: fine) {
  .consent:hover {
    background: var(--color-paper-3);
  }
}

.consent:has(input:focus-visible) {
  outline: 2px solid var(--color-focus);
  outline-offset: var(--space-2xs);
}

.consent:active {
  background: var(--color-paper-3);
}

.consent:has(input:disabled) {
  cursor: not-allowed;
  opacity: 0.55;
}

.form-error {
  min-height: 1.5lh;
  color: var(--color-error);
  font-size: var(--text-sm);
  font-weight: 600;
}

.btn {
  --btn-face: var(--color-accent);
  --btn-ink: var(--color-accent-ink);
  --btn-edge: var(--color-accent-deep);
  position: relative;
  display: inline-flex;
  min-height: 2.875rem;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-lg);
  border: 0;
  border-radius: var(--radius-pill);
  background: var(--btn-face);
  box-shadow: var(--shadow-button);
  color: var(--btn-ink);
  cursor: pointer;
  font-weight: 700;
  isolation: isolate;
  transform: translateY(0);
  transition: transform var(--dur-micro) var(--ease-out), opacity var(--dur-micro) var(--ease-out);
  white-space: nowrap;
}

@media (hover: hover) and (pointer: fine) {
  .btn:hover {
    transform: translateY(calc(var(--space-3xs) * -1));
  }
}

.btn:active {
  box-shadow: none;
  transform: translateY(var(--space-2xs));
}

.btn:focus-visible,
.text-action:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

.btn:disabled,
.btn[aria-disabled="true"] {
  box-shadow: var(--shadow-button);
  cursor: not-allowed;
  opacity: 0.5;
  transform: none;
}

.btn[data-state="error"] {
  --btn-face: var(--color-error-soft);
  --btn-edge: var(--color-error);
}

.btn[data-state="success"] {
  --btn-face: var(--color-success-soft);
  --btn-edge: var(--color-success);
}

.btn[data-state="loading"] .btn__label {
  opacity: 0;
}

.btn__loader {
  position: absolute;
  display: none;
  width: 1.25rem;
  height: 1.25rem;
  border: var(--rule-heavy) solid var(--color-ink);
  border-block-start-color: transparent;
  border-radius: var(--radius-pill);
  animation: spin 900ms linear infinite;
}

.btn[data-state="loading"] .btn__loader {
  display: block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.btn--soft {
  --btn-face: var(--color-accent-2-soft);
  --btn-edge: var(--color-accent-2);
  box-shadow: none;
}

.game-heading {
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

.color-chip {
  justify-self: start;
  padding: var(--space-xs) var(--space-sm);
  border: var(--rule-hair) solid var(--color-ink);
  border-radius: var(--radius-pill);
  background: var(--color-paper);
}

.move-list {
  display: grid;
  max-height: 15rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2xs) var(--space-md);
  margin: 0;
  padding: var(--space-sm) var(--space-md) var(--space-sm) var(--space-xl);
  overflow-y: auto;
  border-block: var(--rule-hair) solid var(--color-rule);
  background: var(--color-paper);
  font-family: var(--font-label);
  font-size: var(--text-sm);
}

.move-list li::marker {
  color: var(--color-muted);
}

.engine-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-xs) var(--space-md);
  align-items: baseline;
  margin-block: var(--space-lg);
  padding: var(--space-md);
  border-radius: var(--radius-input);
  background: var(--color-accent-2-soft);
  color: var(--color-accent-ink);
}

.engine-card > strong {
  justify-self: end;
  font-family: var(--font-label);
  font-size: var(--text-md);
}

.engine-card dl {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-sm);
  padding-block-start: var(--space-sm);
  border-block-start: var(--rule-hair) solid var(--color-ink);
}

.engine-card dl div {
  display: grid;
  gap: var(--space-2xs);
}

.engine-card dt {
  font-size: var(--text-xs);
  text-transform: uppercase;
}

.engine-card dd {
  font-family: var(--font-label);
  font-variant-numeric: tabular-nums;
}

.research-tools {
  margin-block-end: var(--space-lg);
  padding: var(--space-md);
  border-radius: var(--radius-input);
  background: var(--color-accent-2-soft);
}

.game-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xs) var(--space-md);
  margin-block-end: var(--space-md);
}

.text-action {
  min-height: 2.75rem;
  padding: var(--space-xs) 0;
  border: 0;
  border-block-end: var(--rule-heavy) solid var(--color-accent-2);
  border-radius: 0;
  background: transparent;
  color: var(--color-ink);
  cursor: pointer;
  font-weight: 700;
  text-align: start;
  white-space: nowrap;
}

.text-action:hover {
  border-block-end-color: var(--color-ink);
}

.text-action:active {
  background: var(--color-accent-2-soft);
}

.text-action:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.text-action--danger {
  color: var(--color-error);
}

.research-note {
  display: grid;
  gap: var(--space-sm);
  padding: var(--space-lg) var(--space-md) var(--space-xl);
  border-block-start: var(--rule-heavy) dashed var(--color-ink);
}

.site-footer {
  display: grid;
  gap: var(--space-xl);
  padding: var(--space-2xl) var(--page-gutter) var(--space-xl);
  background: var(--color-ink);
  color: var(--color-paper);
}

.site-footer__line {
  max-width: 28ch;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1;
}

.site-footer__meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-sm) var(--space-lg);
  padding-block-start: var(--space-sm);
  border-block-start: var(--rule-hair) solid var(--color-rule);
  color: var(--color-paper-2);
  font-family: var(--font-label);
  font-size: var(--text-xs);
}

.promotion-dialog {
  position: fixed;
  inset: 0;
  width: min(90%, 26rem);
  height: fit-content;
  max-height: min(80dvh, 32rem);
  margin: auto;
  padding: var(--space-lg);
  border: var(--rule-heavy) solid var(--color-ink);
  border-radius: var(--radius-card);
  background: var(--color-paper);
  color: var(--color-ink);
}

.promotion-dialog::backdrop {
  background: var(--color-overlay);
}

.promotion-dialog form {
  gap: var(--space-lg);
}

.promotion-options {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-xs);
}

.promotion-option {
  display: grid;
  min-height: 4rem;
  place-items: center;
  border: var(--rule-heavy) solid var(--color-ink);
  border-radius: var(--radius-input);
  background: var(--color-accent);
  cursor: pointer;
  font-family: var(--font-symbol);
  font-size: var(--text-xl);
}

.promotion-option.is-white {
  color: var(--color-piece-light);
  -webkit-text-stroke: var(--rule-hair) var(--color-piece-dark);
}

.promotion-option.is-black {
  color: var(--color-piece-dark);
}

.promotion-option:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

@media (hover: hover) and (pointer: fine) {
  .promotion-option:hover {
    background: var(--color-board-selected);
  }
}

.promotion-option:active {
  transform: translateY(var(--space-2xs));
}

.promotion-option:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.toast {
  position: fixed;
  z-index: var(--z-toast);
  right: max(var(--space-md), env(safe-area-inset-right));
  bottom: max(var(--space-md), env(safe-area-inset-bottom));
  max-width: min(24rem, calc(100% - 2 * var(--space-md)));
  padding: var(--space-md) var(--space-lg);
  border: var(--rule-heavy) solid var(--color-ink);
  border-radius: var(--radius-input);
  background: var(--color-error-soft);
  box-shadow: var(--shadow-card);
  color: var(--color-error);
  font-weight: 700;
}

@media (min-width: 40rem) {
  .club-mark__long {
    display: inline;
  }

  .club-mark__short {
    display: none;
  }

  .capacity__long {
    display: inline;
  }

  .capacity__short {
    display: none;
  }

  .field-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 60rem) {
  .workbench {
    grid-template-columns: minmax(0, 6fr) minmax(23rem, 5fr);
    gap: var(--space-xl);
    padding-block-start: var(--space-lg);
  }

  .control-column {
    padding-block-start: 0;
  }

  .panel {
    padding: var(--space-md);
  }

  .panel__heading {
    margin-block-end: var(--space-md);
  }

  form {
    gap: var(--space-xs);
  }

  .field {
    gap: var(--space-2xs);
  }

  .consent {
    padding: var(--space-sm);
  }

  .form-error {
    min-height: 1lh;
  }
}

@media (min-width: 25rem) {
  .board-frame {
    width: 100%;
    margin-inline: 0;
    border-inline: var(--rule-heavy) solid var(--color-ink);
    border-radius: var(--radius-board);
  }
}

@media (pointer: coarse) {
  .btn,
  .text-action,
  input,
  select {
    min-height: 3rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}