:root {
  --class-bg: #05070B;
  --class-surface: #0B0F16;
  --class-fg: #F4F6F8;
  --class-muted: #A9B0BA;
  --class-primary: #FF8A34;
  --class-secondary: #171D26;
  --class-success: #4FD18B;
  --class-on-primary: #FFFFFF;
  --class-border: rgba(255, 255, 255, 0.13);
  --class-card: rgba(255, 255, 255, 0.05);
  --class-destructive: #FF6B6B;
  --class-ring: rgba(255, 138, 52, 0.45);
  --class-scrim: rgba(5, 7, 11, 0.82);
  --class-space-1: 4px;
  --class-space-2: 8px;
  --class-space-3: 12px;
  --class-space-4: 16px;
  --class-space-5: 20px;
  --class-space-6: 24px;
  --class-space-8: 32px;
  --class-space-10: 40px;
  --class-space-12: 48px;
  --class-space-16: 64px;
  --class-space-20: 80px;
  --class-display-size: 3.5rem;
  --class-title-size: 2rem;
  --class-row-size: 1.25rem;
  --class-body-size: 1rem;
  --class-label-size: 0.875rem;
  --landing-radius-sm: 8px;
  --landing-radius-md: 20px;
  --class-motion: 180ms;
  --class-ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--class-bg);
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100svh;
  overflow-x: hidden;
  background: var(--class-bg);
  color: var(--class-fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans KR", sans-serif;
  font-size: var(--class-body-size);
  line-height: 1.65;
}

button,
a {
  font: inherit;
}

a.quiet-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  text-decoration: none;
}

button {
  min-height: 44px;
  border: 1px solid transparent;
  border-radius: var(--landing-radius-sm);
  cursor: pointer;
  transition: background var(--class-motion) var(--class-ease), border-color var(--class-motion) var(--class-ease), color var(--class-motion) var(--class-ease), opacity var(--class-motion) var(--class-ease), transform var(--class-motion) var(--class-ease);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

:focus-visible {
  outline: 3px solid var(--class-ring);
  outline-offset: 2px;
}

[hidden] {
  display: none !important;
}

.app-shell {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 100svh;
}

.play-header {
  display: flex;
  align-items: center;
  gap: var(--class-space-4);
  width: min(100%, 1440px);
  margin: 0 auto;
  padding: var(--class-space-5) var(--class-space-6);
  border-bottom: 1px solid var(--class-border);
}

.brand-link {
  color: var(--class-fg);
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

.brand-link span {
  color: var(--class-primary);
}

.header-context {
  flex: 1;
  color: var(--class-muted);
  font-size: var(--class-label-size);
}

.play-main {
  width: min(100%, 1440px);
  margin: 0 auto;
  padding: var(--class-space-6);
}

.spot-game-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  width: min(100%, 1800px);
  margin: 0 auto;
}

.spot-game-side-ad,
.spot-game-bottom-ad {
  display: none;
  color: var(--class-muted);
  font-size: var(--class-label-size);
}

.spot-game-side-ad {
  min-height: 320px;
  padding-top: var(--class-space-6);
}

.spot-game-side-ad > span,
.spot-game-bottom-ad > span {
  display: block;
  margin-bottom: var(--class-space-2);
  font-weight: 750;
}

.spot-game-side-ad > div,
.spot-game-bottom-ad > div {
  display: grid;
  place-items: center;
  border: 1px solid var(--class-border);
  border-radius: var(--landing-radius-sm);
  background: var(--class-surface);
}

.spot-game-side-ad > div {
  min-height: 320px;
}

.spot-game-bottom-ad > div {
  min-height: 104px;
}

.loading-state,
.error-view {
  display: grid;
  min-height: min(60svh, 520px);
  place-content: center;
  justify-items: center;
  gap: var(--class-space-4);
  text-align: center;
}

.loading-state p,
.error-view p {
  margin: 0;
  color: var(--class-muted);
}

.loading-mark {
  width: var(--class-space-8);
  height: var(--class-space-8);
  border: 3px solid var(--class-border);
  border-top-color: var(--class-primary);
  border-radius: 50%;
  animation: spin 800ms linear infinite;
}

.eyebrow {
  margin: 0 0 var(--class-space-3);
  color: var(--class-primary);
  font-size: var(--class-label-size);
  font-weight: 750;
  letter-spacing: 0.08em;
}

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

h1 {
  margin-bottom: var(--class-space-4);
  font-size: var(--class-display-size);
  line-height: 1.05;
  letter-spacing: 0;
}

h2 {
  margin-bottom: var(--class-space-2);
  font-size: var(--class-title-size);
  line-height: 1.2;
}

.welcome-view {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.7fr);
  align-items: end;
  gap: var(--class-space-12);
  min-height: min(70svh, 660px);
  padding: var(--class-space-12) var(--class-space-6);
}

.welcome-copy {
  max-width: 780px;
}

.welcome-description {
  max-width: 680px;
  margin-bottom: var(--class-space-8);
  color: var(--class-muted);
  font-size: var(--class-body-size);
}

.welcome-actions,
.modal-actions,
.game-actions,
.zoom-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--class-space-2);
}

.primary-button {
  padding: var(--class-space-3) var(--class-space-5);
  background: var(--class-primary);
  color: var(--class-on-primary);
  font-weight: 750;
}

.primary-button:hover,
.primary-button:focus-visible {
  background: var(--class-on-primary);
  color: var(--class-bg);
}

.quiet-button,
.control-button {
  padding: var(--class-space-2) var(--class-space-3);
  background: transparent;
  border-color: var(--class-border);
  color: var(--class-fg);
}

.quiet-button:hover,
.control-button:hover,
.quiet-button:focus-visible,
.control-button:focus-visible {
  background: var(--class-secondary);
  border-color: var(--class-primary);
}

.rules-panel {
  padding: var(--class-space-5);
  border: 1px solid var(--class-border);
  border-radius: var(--landing-radius-md);
  background: var(--class-surface);
}

.rules-row {
  display: flex;
  justify-content: space-between;
  gap: var(--class-space-4);
  padding: var(--class-space-3) 0;
  border-bottom: 1px solid var(--class-border);
}

.rules-row span,
.rules-panel p {
  color: var(--class-muted);
}

.rules-row strong {
  color: var(--class-fg);
}

.rules-panel p {
  margin: var(--class-space-4) 0 0;
  font-size: var(--class-label-size);
}

.network-notice {
  margin-top: var(--class-space-4);
  padding: var(--class-space-3) var(--class-space-4);
  border-left: 3px solid var(--class-primary);
  color: var(--class-muted);
  font-size: var(--class-label-size);
}

.game-view {
  padding: var(--class-space-6) 0 var(--class-space-8);
}

.game-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--class-space-6);
  margin-bottom: var(--class-space-5);
}

.game-heading h1 {
  margin-bottom: 0;
  font-size: var(--class-title-size);
}

.hud {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 1px;
  margin-bottom: var(--class-space-4);
  border: 1px solid var(--class-border);
  background: var(--class-border);
}

.hud-cell {
  min-width: 0;
  padding: var(--class-space-3) var(--class-space-4);
  background: var(--class-surface);
}

.hud-label {
  display: block;
  margin-bottom: var(--class-space-1);
  color: var(--class-muted);
  font-size: var(--class-label-size);
}

.hud-cell strong {
  font-size: var(--class-row-size);
}

.hud-unit {
  margin-left: var(--class-space-1);
  color: var(--class-muted);
  font-size: var(--class-label-size);
}

.timer-track {
  display: block;
  height: var(--class-space-1);
  margin-top: var(--class-space-2);
  overflow: hidden;
  background: var(--class-secondary);
}

.timer-track span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--class-primary);
  transition: width var(--class-motion) linear, background var(--class-motion) var(--class-ease);
}

.timer-track.is-danger span {
  background: var(--class-destructive);
}

.compare-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--class-space-4);
  width: 100%;
}

.compare-board {
  min-width: 0;
  border: 1px solid var(--class-border);
  background: var(--class-surface);
}

.board-header {
  display: flex;
  align-items: center;
  gap: var(--class-space-3);
  padding: var(--class-space-3) var(--class-space-4);
  border-bottom: 1px solid var(--class-border);
}

.board-index {
  display: grid;
  width: var(--class-space-8);
  height: var(--class-space-8);
  place-items: center;
  border: 1px solid var(--class-primary);
  border-radius: 50%;
  color: var(--class-primary);
  font-weight: 800;
}

.board-header h2 {
  margin: 0;
  font-size: var(--class-row-size);
}

.board-header p {
  margin: var(--class-space-1) 0 0;
  color: var(--class-muted);
  font-size: var(--class-label-size);
}

.board-viewport {
  position: relative;
  min-height: clamp(16rem, 36vw, 28rem);
  overflow: hidden;
  background: var(--class-bg);
  cursor: crosshair;
  touch-action: none;
  user-select: none;
}

.board-viewport.is-locked {
  cursor: wait;
}

.image-shell {
  position: absolute;
  top: 50%;
  left: 50%;
  overflow: visible;
  transform-origin: center;
  will-change: transform;
}

.image-shell img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
  user-select: none;
}

.marker-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.found-marker {
  position: absolute;
  width: clamp(2.75rem, 6vw, 4.25rem);
  aspect-ratio: 1;
  border: 3px solid var(--class-success);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  animation: marker-in var(--class-motion) var(--class-ease) both;
}

.hint-ring {
  position: absolute;
  min-width: 4rem;
  min-height: 4rem;
  box-sizing: border-box;
  border: 4px solid #f59e0b;
  border-radius: 50%;
  background: rgb(245 158 11 / 10%);
  box-shadow: 0 0 0 8px rgb(245 158 11 / 16%);
  pointer-events: none;
  transform: translate(-50%, -50%);
  animation: hint-pulse 700ms ease-in-out infinite alternate;
}

.wrong-mark {
  position: absolute;
  color: var(--class-destructive);
  font-size: var(--class-title-size);
  font-weight: 800;
  line-height: 1;
  pointer-events: none;
  transform: translate(-50%, -50%);
  animation: wrong-pop 520ms var(--class-ease) both;
}

.compare-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--class-space-4);
  margin-top: var(--class-space-4);
}

.game-status {
  min-height: 1.65em;
  margin: 0;
  color: var(--class-muted);
}

.game-status.is-good {
  color: var(--class-success);
}

.game-status.is-bad {
  color: var(--class-destructive);
}

.zoom-controls {
  justify-content: flex-end;
  flex-shrink: 0;
}

.zoom-controls span {
  min-width: 4.5rem;
  color: var(--class-muted);
  font-size: var(--class-label-size);
  text-align: center;
}

.input-hint {
  margin: var(--class-space-3) 0 0;
  color: var(--class-muted);
  font-size: var(--class-label-size);
}

.modal-layer {
  position: fixed;
  z-index: 20;
  inset: 0;
  display: grid;
  place-items: center;
  padding: var(--class-space-6);
  background: var(--class-scrim);
}

.modal-panel {
  width: min(100%, 520px);
  padding: var(--class-space-8);
  border: 1px solid var(--class-border);
  border-radius: var(--landing-radius-md);
  background: var(--class-surface);
}

.modal-panel h2 {
  margin-bottom: var(--class-space-3);
}

.modal-panel p:not(.eyebrow) {
  color: var(--class-muted);
}

.modal-actions {
  margin-top: var(--class-space-6);
}

.result-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--class-space-2);
  margin-top: var(--class-space-6);
}

.result-stats div {
  padding: var(--class-space-3);
  border: 1px solid var(--class-border);
  background: var(--class-card);
}

.result-stats span,
.result-stats strong {
  display: block;
}

.result-stats span {
  color: var(--class-muted);
  font-size: var(--class-label-size);
}

.result-stats strong {
  margin-top: var(--class-space-1);
  font-size: var(--class-row-size);
}

.play-footer {
  display: flex;
  justify-content: space-between;
  gap: var(--class-space-4);
  width: min(100%, 1440px);
  margin: 0 auto;
  padding: var(--class-space-5) var(--class-space-6);
  border-top: 1px solid var(--class-border);
  color: var(--class-muted);
  font-size: var(--class-label-size);
}

body.is-busy .board-viewport {
  pointer-events: none;
}

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

@keyframes marker-in {
  from { opacity: 0; transform: translate(-50%, -50%) scale(0.8); }
  to { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

@keyframes wrong-pop {
  0% { opacity: 0; transform: translate(-50%, -50%) scale(0.7); }
  24% { opacity: 1; transform: translate(-50%, -50%) scale(1); }
  100% { opacity: 0; transform: translate(-50%, -50%) scale(1.05); }
}

@keyframes hint-pulse {
  from { opacity: 0.62; transform: translate(-50%, -50%) scale(0.94); }
  to { opacity: 1; transform: translate(-50%, -50%) scale(1.04); }
}

@media (max-width: 800px) {
  :root {
    --class-display-size: 2.5rem;
  }

  .play-header,
  .play-main,
  .play-footer {
    padding-right: var(--class-space-4);
    padding-left: var(--class-space-4);
  }

  .welcome-view {
    grid-template-columns: 1fr;
    align-items: start;
    gap: var(--class-space-8);
    min-height: auto;
    padding: var(--class-space-10) 0 var(--class-space-8);
  }

  .game-view {
    padding-top: var(--class-space-4);
  }

  .compare-grid {
    grid-template-columns: 1fr;
  }

  .board-viewport {
    min-height: clamp(16rem, 66vw, 24rem);
  }
}

@media (min-width: 721px) {
  .spot-game-layout {
    grid-template-columns: clamp(72px, 11vw, 180px) minmax(0, 1440px) clamp(72px, 11vw, 180px);
    gap: var(--class-space-4);
    padding-inline: var(--class-space-4);
  }

  .spot-game-side-ad {
    display: block;
  }

  .spot-game-layout .play-main {
    grid-column: 2;
    width: 100%;
  }
}

@media (max-width: 560px) {
  .play-header {
    gap: var(--class-space-2);
  }

  .header-context {
    display: none;
  }

  .play-main {
    padding-top: var(--class-space-4);
  }

  .spot-game-bottom-ad {
    display: grid;
    gap: var(--class-space-2);
    margin: 0 var(--class-space-4) var(--class-space-8);
  }

  .game-heading,
  .compare-toolbar,
  .play-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .game-actions,
  .zoom-controls {
    width: 100%;
    justify-content: flex-start;
  }

  .hud {
    grid-template-columns: repeat(3, 1fr);
  }

  .hud-timer {
    grid-column: 1 / -1;
  }

  .rules-panel,
  .modal-panel {
    border-radius: var(--landing-radius-sm);
  }

  .modal-panel {
    padding: var(--class-space-6);
  }

  .result-stats {
    gap: var(--class-space-1);
  }
}

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

  .loading-mark {
    animation: none;
  }

  .hint-ring {
    animation: none;
  }
}

/* Gomgom Match-integrated game surface. */
:root {
  --class-bg: #f5f6f8;
  --class-surface: #ffffff;
  --class-fg: #17191f;
  --class-muted: #71747d;
  --class-primary: #ff4f68;
  --class-secondary: #eef0f4;
  --class-success: #148a52;
  --class-on-primary: #ffffff;
  --class-border: #dedfe4;
  --class-card: #ffffff;
  --class-destructive: #cf3348;
  --class-ring: rgba(23, 25, 31, .24);
  --class-scrim: rgba(17, 18, 22, .48);
}

html,
body {
  background: var(--class-bg);
  color: var(--class-fg);
}

.app-shell { min-height: 100svh; }

.play-header {
  position: sticky;
  z-index: 30;
  top: 0;
  min-height: 68px;
  width: 100%;
  padding: 10px max(20px, calc((100vw - 1440px) / 2));
  border-bottom: 1px solid var(--class-border);
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(16px) saturate(150%);
}

.brand-link {
  padding: 9px 11px;
  border-radius: 10px;
  color: var(--class-fg);
}

.brand-link:hover { background: var(--class-secondary); }
.brand-link span { color: inherit; }

.spot-game-layout {
  display: grid;
  grid-template-columns: minmax(0, 1120px);
  justify-content: center;
  width: 100%;
  padding: 18px 20px 56px;
}

.spot-game-layout .play-main {
  grid-column: 1;
  width: 100%;
  padding: 0;
}

.spot-game-side-ad,
.spot-game-bottom-ad { display: none !important; }

.game-view { padding: 10px 0 0; }

.game-heading {
  align-items: center;
  margin-bottom: 14px;
}

.game-heading h1 {
  font-size: clamp(1.45rem, 3vw, 2rem);
  letter-spacing: -.04em;
}

.eyebrow { color: var(--class-muted); letter-spacing: 0; }

.quiet-button,
.control-button {
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid #d8d9df;
  border-radius: 10px;
  background: #fff;
  color: var(--class-fg);
  font-weight: 800;
}

.quiet-button:hover,
.control-button:hover,
.quiet-button:focus-visible,
.control-button:focus-visible {
  border-color: #aeb0b8;
  background: var(--class-secondary);
}

#hintButton:not(:disabled) {
  border-color: var(--class-primary);
  color: var(--class-primary);
}

.compare-toggle-button[hidden] { display: none; }

.hud {
  gap: 0;
  overflow: hidden;
  margin-bottom: 16px;
  border: 1px solid var(--class-border);
  border-radius: 14px;
  background: #fff;
}

.hud-cell {
  border-right: 1px solid var(--class-border);
  background: #fff;
}

.hud-cell:last-child { border-right: 0; }
.hud-label { color: var(--class-muted); }
.timer-track { border-radius: 999px; background: #e3e4e8; }
.timer-track span { border-radius: inherit; background: var(--class-primary); }

.compare-grid { gap: 18px; }

.compare-board {
  overflow: hidden;
  border: 1px solid var(--class-border);
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 10px 28px rgba(23,25,31,.08);
}

.board-header {
  border-bottom: 1px solid var(--class-border);
  background: #fff;
}

.board-index {
  border: 0;
  background: var(--class-fg);
  color: #fff;
}

.board-viewport { background: #eceef2; }

.compare-toolbar {
  min-height: 52px;
  margin-top: 14px;
}

.game-status.is-good { color: var(--class-success); }

.hint-ring {
  border-color: var(--class-primary);
  background: rgb(255 79 104 / 10%);
  box-shadow: 0 0 0 8px rgb(255 79 104 / 15%);
}

.modal-layer { background: var(--class-scrim); backdrop-filter: blur(5px); }
.modal-panel { border-color: var(--class-border); background: #fff; color: var(--class-fg); box-shadow: 0 28px 90px rgba(23,25,31,.24); }
.primary-button { border: 0; border-radius: 10px; background: var(--class-primary); }
.primary-button:hover,
.primary-button:focus-visible { background: #e52f4c; color: #fff; }

.play-footer {
  width: min(calc(100% - 40px), 1120px);
  border-top-color: var(--class-border);
}

@media (max-width: 800px) {
  .spot-game-layout { padding: 12px 14px 40px; }
  .game-heading { align-items: flex-start; }
  .compare-grid { gap: 12px; }
  .board-viewport { min-height: clamp(16rem, 66vw, 24rem); }
}

/* Keep the comparison, remaining time and zoom controls together. */
.play-header { padding-block: 6px; min-height: 56px; }
.spot-game-layout { padding-block: 8px; }
.game-view { padding: 0 0 12px; }
.game-heading { align-items: center; gap: 10px; margin-bottom: 8px; }
.game-heading > div:first-child { display: flex; align-items: center; gap: 12px; }
.game-heading .eyebrow, .game-heading h1 { margin: 0; }
.game-heading h1 { font-size: 22px; }
.hud { grid-template-columns: repeat(4,1fr); margin-bottom: 10px; }
.hud-timer { grid-column: auto; }
.hud-cell { padding: 6px 10px; }
.hud-label { font-size: 12px; margin-bottom: 0; }
.timer-track { margin-top: 2px; }
.board-header { padding: 6px 12px; gap: 8px; }
.board-header h2 { font-size: 16px; }
.board-index { width: 24px; height: 24px; font-size: 14px; }
.board-viewport { min-height: 0; height: clamp(120px,calc(100dvh - 280px),460px); }
.compare-toolbar { margin-top: 8px; min-height: 44px; }
@media(max-width:800px) {
  .game-heading { display: grid; grid-template-columns: 1fr; }
  .game-actions { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 5px; width: 100%; }
  .game-actions .control-button { min-width: 0; padding: 0 4px; font-size: 12px; }
  .board-viewport { height: min(66vw,calc(100dvh - 330px)); min-height: 120px; }
  .compare-toolbar { align-items: center; gap: 4px; flex-wrap: wrap; }
  .game-status:empty { display: none; }
  .zoom-controls { margin-left: auto; }
}
@media(orientation:landscape) and (max-height:520px) {
  .play-header { display: none; }
  .spot-game-layout { padding-block: 4px; }
  .hud-cell { padding: 2px 10px; }
  .board-viewport { height: calc(100dvh - 234px); min-height: 110px; }
  .board-header { padding-block: 2px; }
}