:root {
  color-scheme: light;
  --color-canvas: #fffaf5;
  --color-surface: #ffffff;
  --color-surface-raised: #fffdfb;
  --color-surface-sunken: #f7eee6;
  --color-text: #2f231c;
  --color-text-muted: #75665a;
  --color-line: #eadbcf;
  --color-line-strong: #cdb7a5;
  --color-accent: #d96525;
  --color-accent-strong: #a94516;
  --color-accent-soft: #feead9;
  --color-blush: #f5c9bc;
  --color-success: #3f7450;
  --color-danger: #ad4033;
  --color-scrim: rgba(62, 43, 30, 0.34);
  --color-shadow: rgba(112, 70, 39, 0.14);
  --color-accent-shadow: rgba(169, 69, 22, 0.12);
  --color-highlight: rgba(255, 255, 255, 0.82);
  --shadow-panel:
    0 1.5rem 3.5rem var(--color-shadow),
    0 0.25rem 0.75rem var(--color-accent-shadow),
    inset 0 1px var(--color-highlight);
  --font-sans: "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", system-ui, sans-serif;
  --font-display: ui-rounded, "SF Pro Rounded", "Apple SD Gothic Neo", system-ui, sans-serif;
  --font-mono: "SFMono-Regular", "Roboto Mono", ui-monospace, monospace;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --radius-cell: 0.5rem;
  --radius-control: 0.75rem;
  --radius-panel: 1rem;
  --radius-dialog: 1.5rem;
  --duration-fast: 120ms;
  --duration-standard: 200ms;
  --duration-dialog: 260ms;
  --ease-out: cubic-bezier(0.2, 0.8, 0.2, 1);
  --focus-ring:
    0 0 0 2px var(--color-canvas),
    0 0 0 5px var(--color-accent-strong);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 20rem;
  background: var(--color-canvas);
  font-family: var(--font-sans);
  color: var(--color-text);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100dvh;
  background-color: var(--color-canvas);
  background-image:
    radial-gradient(circle at 1px 1px, var(--color-line) 1px, transparent 0),
    linear-gradient(180deg, var(--color-surface) 0, transparent 28rem);
  background-size: 2rem 2rem, 100% 100%;
  background-position: -0.2rem -0.2rem, 0 0;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  content: "";
  background:
    radial-gradient(circle at 8% 28%, var(--color-accent-soft), transparent 24rem),
    radial-gradient(circle at 92% 8%, var(--color-blush), transparent 22rem);
  opacity: 0.35;
}

button {
  font: inherit;
}

button,
[role="button"] {
  touch-action: manipulation;
}

button:focus-visible,
a:focus-visible {
  outline: 0;
  box-shadow: var(--focus-ring);
}

.skip-link {
  position: fixed;
  top: var(--space-4);
  left: var(--space-4);
  z-index: 100;
  padding: var(--space-3) var(--space-4);
  color: var(--color-canvas);
  background: var(--color-text);
  border-radius: var(--radius-control);
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: translateY(0);
}

.action-button {
  min-height: 2.75rem;
  padding: 0.65rem 1.1rem;
  color: var(--color-text);
  background: var(--color-surface-raised);
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-control);
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 650;
  letter-spacing: -0.01em;
  transition:
    background-color var(--duration-standard) var(--ease-out),
    border-color var(--duration-standard) var(--ease-out),
    color var(--duration-standard) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
}

.action-button:hover {
  background: var(--color-surface);
  border-color: var(--color-accent);
}

.action-button:active {
  transform: scale(0.97);
}

.action-button--primary {
  color: var(--color-surface);
  background: var(--color-accent-strong);
  border-color: var(--color-accent-strong);
}

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

.action-button--quiet {
  color: var(--color-text-muted);
  background: transparent;
  border-color: transparent;
}

.action-button--quiet:hover {
  color: var(--color-text);
  background: var(--color-surface-raised);
  border-color: var(--color-line);
}

.action-button:disabled {
  cursor: not-allowed;
  opacity: 0.44;
  transform: none;
}

.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-panel);
  box-shadow: var(--shadow-panel);
}

.panel-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-line);
}

.panel-heading__eyebrow {
  display: block;
  margin-bottom: var(--space-1);
  color: var(--color-accent-strong);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.panel-heading h2,
.panel-heading h3 {
  margin: 0;
  font-size: 1.125rem;
  line-height: 1.4;
  letter-spacing: -0.02em;
}

.metric-readout {
  min-width: 0;
}

.metric-readout__label {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  font-weight: 600;
}

.metric-readout__value {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 650;
  line-height: 1;
  letter-spacing: -0.05em;
}

.metric-readout--emphasis .metric-readout__value {
  color: var(--color-accent-strong);
}

.metric-readout__suffix {
  color: var(--color-text-muted);
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0;
}

.mode-switch {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  min-height: 3.25rem;
  overflow: hidden;
  background: var(--color-line);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-control);
}

.mode-switch button {
  position: relative;
  min-width: 0;
  min-height: 3.25rem;
  padding: var(--space-2) var(--space-3);
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 0;
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 650;
  transition:
    color var(--duration-standard) var(--ease-out),
    background-color var(--duration-standard) var(--ease-out);
}

.mode-switch button:not(:disabled):hover {
  color: var(--color-text);
  background: var(--color-surface-raised);
}

.mode-switch button[aria-pressed="true"] {
  color: var(--color-surface);
  background: var(--color-accent-strong);
}

.mode-switch button:focus-visible {
  z-index: 1;
  box-shadow:
    inset 0 0 0 2px var(--color-canvas),
    inset 0 0 0 5px var(--color-accent-strong);
}

.mode-switch button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
  transform: none;
}

.board-preview,
.game-board {
  display: grid;
  gap: var(--cell-gap, 0.35rem);
  width: 100%;
  aspect-ratio: 1;
  padding: var(--space-3);
  background: var(--color-surface-sunken);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-panel);
}

.board-preview {
  grid-template-columns: repeat(6, 1fr);
  max-width: 30rem;
  aspect-ratio: auto;
}

.board-preview .board-cell {
  aspect-ratio: 1;
}

.board-cell {
  position: relative;
  display: grid;
  min-width: 0;
  min-height: 0;
  padding: 0;
  place-items: center;
  color: var(--color-text);
  background: var(--color-surface-raised);
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-cell);
  cursor: pointer;
  overflow: hidden;
  transition:
    background-color var(--duration-standard) var(--ease-out),
    border-color var(--duration-standard) var(--ease-out),
    color var(--duration-standard) var(--ease-out),
    opacity var(--duration-standard) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
}

.board-cell:not(:disabled):hover {
  background: var(--color-surface);
  border-color: var(--color-accent);
}

.board-cell:not(:disabled):active {
  transform: scale(0.97);
}

.board-cell:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.board-cell[data-state^="revealed"],
.board-cell[data-state="sensor"] {
  background: var(--color-surface-sunken);
  border-color: var(--color-line);
}

.board-cell[data-state="candidate"]::after {
  width: 22%;
  aspect-ratio: 1;
  content: "";
  background: var(--color-accent-strong);
  border-radius: 50%;
}

.board-cell[data-state="excluded"]::before,
.board-cell[data-state="excluded"]::after {
  position: absolute;
  width: 44%;
  height: 2px;
  content: "";
  background: var(--color-text-muted);
  border-radius: 999px;
}

.board-cell[data-state="excluded"]::before {
  transform: rotate(45deg);
}

.board-cell[data-state="excluded"]::after {
  transform: rotate(-45deg);
}

.board-cell[data-region="inside"] {
  background: var(--color-accent-soft);
  border-color: var(--color-accent);
}

.board-cell[data-region="outside"] {
  opacity: 1;
}

.board-cell[data-state="cat"] {
  overflow: hidden;
  color: var(--color-text);
  background: var(--color-accent-soft);
  border-color: var(--color-accent-strong);
  opacity: 1;
}

.board-cell--just-revealed .signal-glyph {
  animation: hint-reveal var(--duration-dialog) var(--ease-out) both;
}

.board-cell--region-enter {
  animation: region-crossfade var(--duration-standard) var(--ease-out) both;
}

.board-cell__cat {
  width: 100%;
  height: 100%;
  max-width: 100%;
  aspect-ratio: 1;
  object-fit: contain;
  transform: translateY(4%) scale(1.12);
}

.board-cell--focus-demo {
  box-shadow: var(--focus-ring);
}

.signal-glyph {
  position: relative;
  display: grid;
  width: 54%;
  max-width: 2.75rem;
  aspect-ratio: 1;
  place-items: center;
  color: var(--color-accent-strong);
  border: 1px solid currentColor;
  border-radius: 50%;
}

.signal-glyph::before,
.signal-glyph::after {
  position: absolute;
  content: "";
  border: 1px solid currentColor;
  border-radius: 50%;
}

.signal-glyph::before {
  inset: 22%;
}

.signal-glyph::after {
  inset: 42%;
  background: currentColor;
}

.signal-glyph--mid::before {
  display: none;
}

.signal-glyph--far::before,
.signal-glyph--far::after {
  display: none;
}

.signal-glyph--far {
  width: 34%;
  opacity: 0.72;
}

.signal-glyph--sensor {
  animation: sensor-breathe 2.4s var(--ease-out) infinite;
}

.signal-glyph--sensor::after {
  inset: 36%;
}

.hint-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  min-height: 3.25rem;
  padding: var(--space-2) 0;
  color: var(--color-text);
  text-align: left;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--color-line);
  cursor: pointer;
  transition:
    color var(--duration-standard) var(--ease-out),
    background-color var(--duration-standard) var(--ease-out);
}

.hint-row:hover {
  background: var(--color-surface-raised);
}

.hint-row[aria-current="true"] {
  color: var(--color-accent-strong);
}

.hint-row__order {
  display: grid;
  width: 1.75rem;
  aspect-ratio: 1;
  color: var(--color-canvas);
  background: var(--color-text-muted);
  border-radius: 50%;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
}

.hint-row[aria-current="true"] .hint-row__order {
  background: var(--color-accent-strong);
}

.hint-row__main {
  min-width: 0;
}

.hint-row__coord {
  display: block;
  color: inherit;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 650;
}

.hint-row__meta {
  display: block;
  margin-top: 0.1rem;
  color: var(--color-text-muted);
  font-size: 0.75rem;
}

.hint-row__band {
  color: inherit;
  font-size: 0.8125rem;
  font-weight: 650;
  white-space: nowrap;
}

.status-banner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 3.25rem;
  padding: var(--space-3) var(--space-4);
  color: var(--color-text);
  background: var(--color-surface-sunken);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-control);
  font-size: 0.875rem;
  line-height: 1.5;
  text-wrap: pretty;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

.status-banner::before {
  flex: 0 0 auto;
  width: 0.6rem;
  aspect-ratio: 1;
  content: "";
  background: var(--color-accent);
  border-radius: 50%;
}

.status-banner[data-tone="success"]::before {
  background: var(--color-success);
}

.status-banner[data-tone="danger"]::before {
  background: var(--color-danger);
}

.result-card {
  max-width: 30rem;
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-dialog);
  box-shadow: var(--shadow-panel);
}

.result-card__label {
  margin: 0 0 var(--space-3);
  color: var(--color-accent-strong);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.result-card h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.035em;
  text-wrap: balance;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

.result-card h2:focus {
  outline: none;
}

.keep-together {
  white-space: nowrap;
}

.result-cat-reveal {
  display: grid;
  height: 9rem;
  margin: calc(var(--space-3) * -1) 0 var(--space-4);
  overflow: hidden;
  background:
    radial-gradient(circle, var(--color-surface) 0 30%, transparent 70%),
    var(--color-accent-soft);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-panel);
  place-items: center;
}

.result-cat-reveal img {
  width: 12rem;
  height: 12rem;
  object-fit: contain;
  filter: drop-shadow(0 0.75rem 0.75rem var(--color-shadow));
  transform: translateY(8%);
}

.result-card p {
  margin: var(--space-4) 0 var(--space-6);
  color: var(--color-text-muted);
  line-height: 1.65;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.showcase-shell {
  width: min(calc(100% - 2rem), 80rem);
  margin-inline: auto;
  padding-block: var(--space-8) var(--space-16);
}

.showcase-shell p,
.showcase-shell li {
  word-break: keep-all;
  overflow-wrap: anywhere;
}

.showcase-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-6);
  margin-bottom: var(--space-10);
}

.showcase-header__kicker {
  margin: 0 0 var(--space-2);
  color: var(--color-accent-strong);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.showcase-header h1 {
  margin: 0;
  font-size: clamp(2rem, 6vw, 3.5rem);
  line-height: 1;
  letter-spacing: -0.05em;
}

.showcase-header p {
  max-width: 34rem;
  margin: 0;
  color: var(--color-text-muted);
  line-height: 1.6;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-6);
}

.showcase-section {
  grid-column: span 6;
  padding: var(--space-6);
}

.showcase-section--wide {
  grid-column: 1 / -1;
}

.showcase-section h2 {
  margin: 0 0 var(--space-6);
  font-size: 1rem;
  letter-spacing: -0.01em;
}

.showcase-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.showcase-row--stack {
  flex-direction: column;
}

.showcase-caption {
  margin: var(--space-4) 0 var(--space-2);
  color: var(--color-text-muted);
  font-size: 0.75rem;
}

.showcase-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.showcase-hints {
  max-width: 30rem;
}

.showcase-cat-portrait {
  max-width: 15rem;
  margin: 0;
}

.dialog-showcase {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr));
  gap: var(--space-4);
}

.game-dialog--demo {
  position: static;
  display: block;
  width: 100%;
  margin: 0;
}

.game-dialog.game-dialog--demo .result-card {
  width: 100%;
  height: 100%;
}

.game-dialog--demo[open] .result-card {
  animation: none;
}

.game-dialog--demo h3 {
  margin: 0;
  font-size: 1.5rem;
  line-height: 1.25;
  letter-spacing: -0.03em;
  text-wrap: balance;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

@keyframes sensor-breathe {
  50% {
    transform: scale(1.08);
    opacity: 0.82;
  }
}

@keyframes hint-reveal {
  from {
    opacity: 0;
    transform: scale(0.72);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes region-crossfade {
  from {
    opacity: 0.58;
  }

  to {
    opacity: 1;
  }
}

@media (max-width: 47.99rem) {
  body {
    background-size: 1.5rem 1.5rem, 100% 100%;
  }

  .showcase-shell {
    width: min(calc(100% - 1.5rem), 80rem);
    padding-block: var(--space-6) var(--space-12);
  }

  .showcase-header {
    align-items: flex-start;
    flex-direction: column;
    margin-bottom: var(--space-8);
  }

  .showcase-section {
    grid-column: 1 / -1;
    padding: var(--space-4);
  }

  .showcase-metrics {
    gap: var(--space-3);
  }

  .metric-readout__value {
    font-size: 1.75rem;
  }

  .result-card {
    padding: var(--space-6);
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.game-page {
  padding-bottom: var(--space-12);
}

.game-page p,
.game-dialog li {
  word-break: keep-all;
  overflow-wrap: anywhere;
}

.game-header {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-6);
  width: min(calc(100% - 3rem), 90rem);
  min-height: 5.25rem;
  margin-inline: auto;
  border-bottom: 1px solid var(--color-line);
}

.wordmark {
  display: inline-flex;
  gap: var(--space-2);
  align-items: baseline;
  color: var(--color-text);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 700;
  letter-spacing: -0.045em;
}

.wordmark__mark {
  width: 2rem;
  height: 2rem;
  align-self: center;
  color: var(--color-accent-strong);
  fill: var(--color-accent-soft);
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.6;
}

.wordmark strong {
  color: var(--color-accent);
}

.game-header__tagline {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.game-header__actions {
  display: flex;
  gap: var(--space-2);
  justify-content: flex-end;
}

.game-shell {
  display: grid;
  grid-template-columns: minmax(13rem, 15.5rem) minmax(28rem, 1fr) minmax(15rem, 17rem);
  gap: clamp(1rem, 2vw, 1.5rem);
  width: min(calc(100% - 3rem), 90rem);
  margin: var(--space-6) auto 0;
}

.status-rail,
.evidence-rail {
  min-width: 0;
  padding: var(--space-6);
}

.status-rail {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 44rem;
  overflow: hidden;
}

.cat-portrait {
  position: relative;
  display: grid;
  margin: calc(var(--space-6) * -1) calc(var(--space-6) * -1) var(--space-6);
  padding: var(--space-4);
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 48%, var(--color-surface) 0 32%, transparent 66%),
    var(--color-accent-soft);
  border-bottom: 1px solid var(--color-line);
  isolation: isolate;
}

.cat-portrait__halo {
  position: absolute;
  inset: 1rem 1.4rem auto;
  z-index: 0;
  aspect-ratio: 1;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: 50%;
  box-shadow:
    0 1.25rem 2.5rem var(--color-accent-shadow),
    inset 0 -1rem 2rem var(--color-accent-soft);
}

.cat-portrait img {
  position: relative;
  z-index: 1;
  display: block;
  width: 116%;
  max-width: none;
  height: auto;
  margin: -6% 0 -14% -8%;
  filter: drop-shadow(0 0.9rem 0.9rem var(--color-shadow));
}

.cat-portrait figcaption {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-1);
  margin-top: var(--space-2);
  text-align: center;
}

.cat-portrait figcaption span {
  color: var(--color-accent-strong);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.cat-portrait figcaption strong {
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: -0.02em;
}

.status-metrics {
  display: grid;
  gap: var(--space-6);
  margin-top: var(--space-6);
}

.status-metrics .metric-readout {
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-line);
}

.difficulty-note {
  margin-top: var(--space-6);
}

.difficulty-note__label {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--color-text-muted);
  font-size: 0.75rem;
  font-weight: 600;
}

.difficulty-note strong {
  display: block;
  font-size: 1rem;
}

.difficulty-note p {
  margin: var(--space-2) 0 0;
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  line-height: 1.6;
}

.status-rail .status-banner {
  margin-top: var(--space-6);
}

.vertical-note {
  display: flex;
  flex: 1;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-3);
  margin: var(--space-8) 0 0;
  padding-top: var(--space-6);
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-line);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
}

.vertical-note::after {
  align-self: stretch;
  width: 1px;
  margin-left: auto;
  content: "";
  background: var(--color-accent);
  opacity: 0.72;
}

.board-panel {
  min-width: 0;
  align-self: start;
}

.board-panel__header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-6);
  min-height: 4.75rem;
  padding: 0 var(--space-2) var(--space-4);
}

.board-panel__header h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  line-height: 1.2;
  letter-spacing: -0.035em;
}

.board-panel__header p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  text-align: right;
}

.board-panel__header p strong {
  color: var(--color-text);
  font-family: var(--font-mono);
}

.game-board {
  grid-template-columns: repeat(var(--board-size, 7), 1fr);
  grid-template-rows: repeat(var(--board-size, 7), minmax(0, 1fr));
  width: min(100%, 43rem);
  margin-inline: auto;
}

.game-board .board-cell {
  container-type: inline-size;
}

.game-board .board-cell:disabled {
  cursor: default;
}

.cell-coordinate {
  position: absolute;
  top: 0.3rem;
  left: 0.35rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: clamp(0.48rem, 14cqi, 0.65rem);
  line-height: 1;
  opacity: 1;
  transition: opacity var(--duration-standard) var(--ease-out);
}

.board-cell:hover .cell-coordinate,
.board-cell:focus-visible .cell-coordinate {
  opacity: 1;
}

.board-panel .mode-switch {
  width: min(100%, 43rem);
  margin: var(--space-4) auto 0;
}

.mode-switch button span,
.mode-switch button small {
  display: block;
}

.mode-switch button small {
  margin-top: 0.15rem;
  font-size: 0.675rem;
  font-weight: 500;
  opacity: 1;
}

.keyboard-help {
  margin: var(--space-3) 0 0;
  color: var(--color-text-muted);
  font-size: 0.75rem;
  text-align: center;
}

.evidence-rail {
  align-self: start;
}

.hint-count {
  display: grid;
  width: 2rem;
  aspect-ratio: 1;
  color: var(--color-canvas);
  background: var(--color-accent-strong);
  border-radius: 50%;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
}

.selected-hint {
  padding: var(--space-6) 0;
  border-bottom: 1px solid var(--color-line);
}

.selected-hint__topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.selected-hint__topline h3 {
  margin: 0;
  font-size: 0.875rem;
}

.selected-hint__topline strong {
  color: var(--color-accent-strong);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.selected-hint__signal {
  display: grid;
  grid-template-columns: 3.25rem 1fr;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.selected-hint__signal .signal-glyph {
  width: 3.25rem;
}

.selected-hint__signal strong,
.selected-hint__signal span {
  display: block;
}

.selected-hint__signal strong {
  font-size: 1.125rem;
}

.selected-hint__signal div > span {
  margin-top: var(--space-1);
  color: var(--color-text-muted);
  font-size: 0.75rem;
}

.selected-hint p,
.evidence-note {
  margin: var(--space-4) 0 0;
  color: var(--color-text-muted);
  font-size: 0.75rem;
  line-height: 1.6;
}

.band-legend {
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-line);
}

.band-legend > div {
  display: grid;
  grid-template-columns: 1.5rem 1fr auto;
  align-items: center;
  gap: var(--space-2);
  min-height: 2rem;
}

.band-legend strong {
  font-size: 0.75rem;
}

.band-legend span:last-child {
  color: var(--color-text-muted);
  font-size: 0.6875rem;
}

.legend-rings {
  position: relative;
  width: 1.125rem;
  aspect-ratio: 1;
  border: 1px solid var(--color-accent-strong);
  border-radius: 50%;
}

.legend-rings::before,
.legend-rings::after {
  position: absolute;
  content: "";
  border: 1px solid var(--color-accent-strong);
  border-radius: 50%;
}

.legend-rings::before {
  inset: 23%;
}

.legend-rings::after {
  inset: 44%;
  background: var(--color-accent-strong);
}

.legend-rings--mid::before {
  display: none;
}

.legend-rings--far::before,
.legend-rings--far::after {
  display: none;
}

.history-list {
  max-height: 17rem;
  overflow-y: auto;
  scrollbar-color: var(--color-line-strong) transparent;
}

.evidence-note {
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-line);
}

.game-dialog {
  max-width: none;
  padding: 0;
  color: var(--color-text);
  background: transparent;
  border: 0;
}

.game-dialog:focus {
  outline: 0;
}

.game-dialog:focus-visible .result-card {
  box-shadow:
    var(--focus-ring),
    var(--shadow-panel);
}

.game-dialog::backdrop {
  background: var(--color-scrim);
}

.game-dialog[open] .result-card {
  animation: dialog-enter var(--duration-dialog) var(--ease-out) both;
}

.tutorial-card {
  width: min(calc(100vw - 2rem), 35rem);
  max-height: calc(100dvh - var(--space-8));
  padding: var(--space-6);
  overflow-y: auto;
  scrollbar-color: var(--color-line-strong) transparent;
}

.tutorial-card:focus {
  outline: 0;
}

.tutorial-card:focus-visible {
  box-shadow:
    var(--focus-ring),
    var(--shadow-panel);
}

.tutorial-card__summary {
  margin-bottom: var(--space-4) !important;
}

.rulebook {
  border-top: 1px solid var(--color-line);
}

.rulebook__section {
  padding-block: var(--space-4);
}

.rulebook__section + .rulebook__section {
  border-top: 1px solid var(--color-line);
}

.rulebook h3,
.rulebook h4 {
  margin: 0;
  color: var(--color-text);
  font-size: 0.875rem;
  line-height: 1.5;
}

.rulebook p {
  margin: var(--space-2) 0 0;
  font-size: 0.8125rem;
  line-height: 1.65;
  word-break: keep-all;
  overflow-wrap: break-word;
}

.rulebook__example {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-3);
  color: var(--color-text) !important;
  background: var(--color-surface-sunken);
  border-radius: var(--radius-control);
}

.rulebook__example strong {
  flex: 0 0 auto;
  color: var(--color-accent-strong);
}

.rulebook__example span {
  min-width: 0;
}

.rulebook__bands {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: var(--space-3);
  overflow: hidden;
  background: var(--color-line);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-control);
}

.rulebook__bands span {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-2);
  color: var(--color-text-muted);
  text-align: center;
  background: var(--color-surface);
  font-size: 0.75rem;
}

.rulebook__bands strong {
  color: var(--color-text);
}

.rulebook__modes {
  margin: var(--space-2) 0 0;
}

.rulebook__modes > div {
  display: grid;
  grid-template-columns: var(--space-16) 1fr;
  gap: var(--space-3);
  padding-block: var(--space-2);
}

.rulebook__modes > div + div {
  border-top: 1px solid var(--color-line);
}

.rulebook__modes dt {
  color: var(--color-accent-strong);
  font-size: 0.8125rem;
  font-weight: 700;
}

.rulebook__modes dd {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  line-height: 1.6;
  word-break: keep-all;
  overflow-wrap: break-word;
}

.rulebook__modes dd .keep-together {
  display: inline-block;
}

.tutorial-card > .button-row {
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-line);
}

.result-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin: 0 0 var(--space-6);
  overflow: hidden;
  background: var(--color-line);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-control);
}

.result-stats span {
  padding: var(--space-3);
  color: var(--color-text-muted);
  text-align: center;
  background: var(--color-surface-sunken);
  font-size: 0.75rem;
}

.result-stats strong {
  display: block;
  margin-bottom: var(--space-1);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 1rem;
}

@keyframes dialog-enter {
  from {
    opacity: 0;
    transform: translateY(0.5rem);
  }
}

@media (max-width: 68.74rem) {
  .game-shell {
    grid-template-columns: minmax(0, 1fr) minmax(14rem, 17rem);
  }

  .status-rail {
    grid-column: 1 / -1;
    min-height: auto;
  }

  .cat-portrait {
    grid-template-columns: 12rem 1fr;
    align-items: center;
    min-height: 10rem;
    padding: var(--space-3) var(--space-6);
  }

  .cat-portrait__halo {
    inset: var(--space-3) auto var(--space-3) var(--space-6);
    width: 9rem;
  }

  .cat-portrait img {
    width: 12rem;
    margin: -10% 0 -16% -8%;
  }

  .cat-portrait figcaption {
    margin: 0;
    text-align: left;
  }

  .status-metrics {
    grid-template-columns: repeat(3, 1fr);
    margin-top: var(--space-4);
  }

  .status-metrics .metric-readout {
    padding: 0;
    border: 0;
  }

  .difficulty-note {
    display: grid;
    grid-template-columns: auto 1fr;
    column-gap: var(--space-4);
    align-items: baseline;
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-line);
  }

  .difficulty-note__label {
    grid-column: 1 / -1;
  }

  .difficulty-note p {
    margin: 0;
  }

  .status-rail .status-banner {
    margin-top: var(--space-4);
  }

  .vertical-note {
    display: none;
  }
}

@media (max-width: 47.99rem) {
  body {
    background-size: 1.5rem 1.5rem, 100% 100%;
  }

  .game-page {
    padding-bottom: var(--space-8);
  }

  .game-header {
    grid-template-columns: 1fr auto;
    width: min(calc(100% - 1.5rem), 90rem);
    min-height: 4.5rem;
  }

  .wordmark {
    font-size: 1.45rem;
  }

  .game-header__tagline {
    display: none;
  }

  .game-header__actions {
    gap: var(--space-1);
  }

  .game-header__actions .action-button {
    padding-inline: var(--space-3);
  }

  .game-shell {
    grid-template-columns: minmax(0, 1fr);
    width: min(calc(100% - 1.5rem), 90rem);
    margin-top: var(--space-4);
  }

  .status-rail,
  .evidence-rail {
    padding: var(--space-4);
  }

  .cat-portrait {
    grid-template-columns: 7rem 1fr;
    min-height: 7.25rem;
    margin: calc(var(--space-4) * -1) calc(var(--space-4) * -1) var(--space-4);
    padding: var(--space-2) var(--space-4);
  }

  .cat-portrait__halo {
    inset: var(--space-2) auto var(--space-2) var(--space-4);
    width: 6.25rem;
  }

  .cat-portrait img {
    width: 8rem;
    margin: -12% 0 -18% -12%;
  }

  .cat-portrait figcaption strong {
    font-size: 0.875rem;
  }

  .status-rail .panel-heading {
    display: none;
  }

  .status-metrics {
    margin-top: 0;
  }

  .status-metrics .metric-readout__label {
    font-size: 0.6875rem;
  }

  .status-metrics .metric-readout__value {
    font-size: 1.5rem;
  }

  .difficulty-note {
    display: none;
  }

  .board-panel {
    grid-row: 2;
  }

  .board-panel__header {
    min-height: 3.75rem;
    padding-inline: 0;
  }

  .board-panel__header p {
    max-width: 9rem;
    font-size: 0.6875rem;
  }

  .game-board {
    --cell-gap: 0.25rem;
    padding: var(--space-2);
    border-radius: var(--radius-control);
  }

  .game-board[data-size="11"] {
    --cell-gap: 1px;
    padding: var(--space-1);
  }

  .game-board .signal-glyph {
    width: 62%;
  }

  .cell-coordinate {
    display: none;
  }

  .board-panel .mode-switch {
    position: static;
  }

  .keyboard-help {
    display: none;
  }

  .evidence-rail {
    grid-row: 3;
  }

  .history-list {
    max-height: none;
  }

  .game-dialog .result-card {
    width: min(calc(100vw - 1.5rem), 30rem);
  }
}

figure.showcase-cat-portrait {
  grid-template-columns: 1fr;
  min-height: auto;
  margin: 0;
  padding: var(--space-4);
}

.showcase-cat-portrait .cat-portrait__halo {
  inset: var(--space-4) var(--space-4) auto;
  width: auto;
}

.showcase-cat-portrait img {
  width: 116%;
  margin: -6% 0 -14% -8%;
}

.showcase-cat-portrait figcaption {
  margin-top: var(--space-2);
  text-align: center;
}

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

/* 연속 성공 랭킹 */
.ranking-card {
  max-width: 26rem;
}

.ranking-card__summary {
  margin: var(--space-3) 0 var(--space-4);
  color: var(--color-text-muted);
  word-break: keep-all;
}

.ranking-name-form {
  display: flex;
  gap: var(--space-2);
}

.ranking-name-form input {
  flex: 1;
  min-width: 0;
  padding: 0.6rem 0.85rem;
  color: var(--color-text);
  font-family: inherit;
  font-size: 1rem;
  background: var(--color-surface-sunken);
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-control);
}

.ranking-name-form input:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.ranking-mine {
  margin: var(--space-2) 0 var(--space-4);
  color: var(--color-text-muted);
  font-size: 0.8125rem;
}

.ranking-status {
  margin: 0 0 var(--space-3);
  color: var(--color-accent-strong);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}

.ranking-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  max-height: 18rem;
  overflow-y: auto;
  background: var(--color-line);
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-panel);
}

.ranking-row {
  display: grid;
  grid-template-columns: 2.25rem 1fr auto;
  gap: var(--space-3);
  align-items: center;
  padding: 0.6rem 0.85rem;
  background: var(--color-surface);
}

.ranking-row--mine {
  background: var(--color-accent-soft);
}

.ranking-row__rank {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-align: right;
}

.ranking-row__name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ranking-row__score {
  color: var(--color-text-muted);
  font-size: 0.8125rem;
}

.ranking-row__score strong {
  margin-right: 0.15em;
  color: var(--color-accent-strong);
  font-size: 1rem;
}

.ranking-empty {
  margin: 0;
  padding: var(--space-6) var(--space-4);
  color: var(--color-text-muted);
  text-align: center;
  background: var(--color-surface);
}