:root {
  --background: #f7f8fc;
  --surface: #ffffff;
  --text: #111111;
  --muted: #565d6d;
  --line: #d9deea;
  --line-strong: #111111;
  --accent: #2457d6;
  --accent-strong: #173e9f;
  --accent-soft: #edf3ff;
  --violet: #7558d7;
  --coral: #ff705d;
  --yellow: #ffd85e;
  --accent-text: #ffffff;
  --focus: #ffbf47;
  --candidate-size: 44px;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI",
    Roboto, system-ui, sans-serif;
  color: var(--text);
  background: var(--background);
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

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

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 8% 12%, rgb(255 216 94 / 22%), transparent 25rem),
    radial-gradient(circle at 92% 8%, rgb(117 88 215 / 14%), transparent 28rem),
    radial-gradient(circle at 82% 88%, rgb(255 112 93 / 12%), transparent 24rem),
    var(--background);
  color: var(--text);
}

button,
select,
input {
  font: inherit;
}

button,
select,
label {
  -webkit-tap-highlight-color: transparent;
}

button,
select,
input[type="radio"] {
  accent-color: var(--accent);
}

button:focus-visible,
select:focus-visible,
input:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 10px 14px;
  transform: translateY(-160%);
  border: 2px solid var(--text);
  background: var(--surface);
  color: var(--text);
}

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

.app-header {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 104px;
  padding: 20px clamp(16px, 4vw, 56px);
  overflow: hidden;
  border-bottom: 1px solid rgb(17 17 17 / 8%);
  background: rgb(255 255 255 / 72%);
  backdrop-filter: blur(18px);
}

.result-screen h2 {
  margin: 0;
  font-weight: 650;
  letter-spacing: -0.03em;
}

.title-stage {
  position: relative;
  display: flex;
  align-items: center;
  min-width: 0;
}

.title-decoration,
.brand-kicker,
.title-details {
  display: none;
}

.brand-title {
  display: flex;
  gap: 0.22em;
  margin: 0;
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  font-weight: 780;
  letter-spacing: -0.055em;
  line-height: 0.95;
}

.brand-title-accent {
  color: var(--accent);
}

body[data-screen="start"] .app-header {
  min-height: 248px;
  padding-top: 34px;
  padding-bottom: 66px;
  background:
    radial-gradient(circle at 12% 20%, rgb(255 216 94 / 38%), transparent 19rem),
    radial-gradient(circle at 74% 22%, rgb(117 88 215 / 17%), transparent 25rem),
    linear-gradient(112deg, rgb(255 255 255 / 92%), rgb(247 249 255 / 82%));
}

body[data-screen="start"] .title-stage {
  gap: clamp(22px, 4vw, 52px);
}

body[data-screen="start"] .title-decoration {
  position: relative;
  display: block;
  width: 142px;
  height: 142px;
  flex: 0 0 142px;
}

.target-ring {
  position: absolute;
  border-radius: 50%;
}

.target-ring-outer {
  inset: 0;
  border: 18px solid rgb(36 87 214 / 10%);
  box-shadow: inset 0 0 0 1px rgb(36 87 214 / 15%);
}

.target-ring-inner {
  inset: 36px;
  border: 12px solid var(--accent);
  background: var(--surface);
  box-shadow:
    0 15px 40px rgb(36 87 214 / 18%),
    inset 0 0 0 7px var(--surface);
}

.title-token {
  position: absolute;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid rgb(17 17 17 / 8%);
  border-radius: 13px;
  background: var(--surface);
  font-weight: 800;
  box-shadow: 0 12px 30px rgb(45 52 76 / 14%);
}

.title-token-number {
  top: -5px;
  right: -10px;
  color: var(--coral);
  transform: rotate(7deg);
}

.title-token-shape {
  bottom: -2px;
  left: -12px;
  color: var(--violet);
  transform: rotate(-8deg);
}

body[data-screen="start"] .brand-kicker {
  display: block;
  margin: 0 0 10px;
  color: var(--accent-strong);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.18em;
}

body[data-screen="start"] .brand-title {
  font-size: clamp(3.6rem, 7vw, 6.4rem);
  font-weight: 820;
}

body[data-screen="start"] .title-details {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  color: var(--muted);
}

.title-details p {
  margin: 0;
  font-size: 0.82rem;
  font-weight: 650;
}

.title-details > span {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--coral);
}

.language-control {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 6px;
  min-width: 140px;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.language-control select {
  min-height: 44px;
  padding: 8px 34px 8px 10px;
  border: 1px solid rgb(17 17 17 / 16%);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 6px 18px rgb(50 56 75 / 8%);
  text-transform: none;
}

.app-layout {
  width: min(1240px, 100%);
  margin: 0 auto;
  padding: 24px clamp(16px, 4vw, 56px) 48px;
}

body[data-screen="start"] .app-layout {
  margin-top: -42px;
  padding-top: 0;
}

.workspace {
  overflow: hidden;
  border: 1px solid rgb(17 17 17 / 7%);
  border-radius: 28px;
  background: var(--surface);
  box-shadow:
    0 24px 70px rgb(45 52 76 / 10%),
    0 3px 12px rgb(45 52 76 / 5%);
}

body[data-screen="start"] .workspace {
  position: relative;
  background:
    radial-gradient(circle at 92% 12%, rgb(36 87 214 / 7%), transparent 18rem),
    var(--surface);
}

.screen {
  min-height: 640px;
  padding: clamp(20px, 4vw, 48px);
}

.screen[hidden] {
  display: none;
}

.start-screen {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 0;
  padding: clamp(30px, 4vw, 52px);
}

.result-heading h2 {
  font-size: clamp(1.7rem, 4vw, 3.4rem);
}

.setup-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  width: min(100%, 920px);
  gap: clamp(24px, 4vw, 48px);
  margin: 0 auto;
}

.setup-group {
  position: relative;
  display: grid;
  align-content: start;
  gap: 10px;
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.setup-heading {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 32px;
}

.setup-heading h2 {
  margin: 0;
  padding: 0;
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 32px;
  letter-spacing: 0.035em;
}

.info-button {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  padding: 0;
  border: 1px solid rgb(17 17 17 / 14%);
  border-radius: 50%;
  background: rgb(255 255 255 / 80%);
  color: var(--text);
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 800;
  line-height: 1;
  box-shadow: 0 5px 15px rgb(45 52 76 / 8%);
}

.info-button:hover,
.info-button[aria-expanded="true"] {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.info-panel {
  position: absolute;
  top: 40px;
  left: 0;
  z-index: 5;
  width: min(100%, 370px);
  padding: 14px 16px;
  border: 1px solid rgb(36 87 214 / 16%);
  border-radius: 16px;
  background: linear-gradient(135deg, #f7faff, #f7f4ff);
  color: #343a49;
  box-shadow: 0 10px 28px rgb(45 52 76 / 8%);
}

.info-panel[hidden] {
  display: none;
}

.info-panel p {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.55;
}

.info-panel p + p {
  margin-top: 5px;
}

.option-list {
  display: grid;
  gap: 5px;
  padding: 5px;
  border: 1px solid rgb(17 17 17 / 6%);
  border-radius: 18px;
  background: #f0f2f7;
  box-shadow: inset 0 1px 2px rgb(45 52 76 / 5%);
}

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

.difficulty-options {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.option-card {
  position: relative;
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  align-items: center;
  min-height: 52px;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: 14px;
  background: transparent;
  box-shadow: none;
  cursor: pointer;
  transition:
    border-color 140ms ease,
    box-shadow 140ms ease,
    transform 140ms ease,
    background-color 140ms ease;
}

.option-card:has(input:checked) {
  border-color: rgb(36 87 214 / 24%);
  background: var(--surface);
  box-shadow:
    0 0 0 1px rgb(36 87 214 / 8%),
    0 8px 20px rgb(45 52 76 / 10%);
}

.option-card:has(input:focus-visible) {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.option-card input:focus-visible {
  outline: 0;
}

.option-card:hover {
  background: rgb(255 255 255 / 62%);
}

.option-card input {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  margin: 0;
  appearance: none;
  border: 2px solid #7d8492;
  border-radius: 50%;
  background: var(--surface);
  flex: 0 0 auto;
}

.option-card input::after {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  content: "";
  transform: scale(0);
}

.option-card input:checked {
  border-color: var(--accent);
}

.option-card input:checked::after {
  transform: scale(1);
}

.option-card strong {
  font-size: 0.92rem;
  line-height: 1.15;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: auto;
}

.start-screen .action-row {
  justify-content: center;
  align-items: center;
  width: min(100%, 920px);
  margin: 28px auto 0;
}

.primary-button,
.secondary-button,
.text-button {
  min-height: 48px;
  border: 1px solid transparent;
  border-radius: 14px;
  cursor: pointer;
  font-weight: 700;
  transition:
    transform 140ms ease,
    box-shadow 140ms ease,
    background-color 140ms ease;
}

.primary-button,
.secondary-button {
  min-width: 150px;
  padding: 12px 18px;
}

.primary-button {
  background: linear-gradient(135deg, var(--accent), var(--violet));
  color: var(--surface);
  box-shadow: 0 12px 30px rgb(36 87 214 / 24%);
}

.start-screen .primary-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100%, 440px);
  min-height: 64px;
  padding: 14px 20px 14px 26px;
  border-radius: 20px;
  font-size: 1.08rem;
  letter-spacing: 0.01em;
}

.button-arrow {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgb(255 255 255 / 18%);
  font-size: 1.25rem;
  line-height: 1;
}

.secondary-button {
  border-color: rgb(17 17 17 / 10%);
  background: rgb(255 255 255 / 72%);
  color: var(--text);
}

.text-button {
  padding: 8px 12px;
  background: transparent;
  color: var(--text);
}

.primary-button:hover,
.primary-button:active {
  background: linear-gradient(135deg, var(--accent-strong), #5938ae);
  box-shadow: 0 16px 34px rgb(36 87 214 / 30%);
  transform: translateY(-1px);
}

.secondary-button:hover,
.text-button:hover {
  background: var(--accent-soft);
}

.game-screen {
  padding: 0;
}

.game-toolbar {
  display: grid;
  grid-template-columns: minmax(170px, 1fr) auto auto;
  align-items: center;
  gap: 24px;
  min-height: 106px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--line);
}

.find-control {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.find-label {
  flex: 0 0 auto;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.target-display {
  display: grid;
  place-items: center;
  min-width: 76px;
  min-height: 56px;
  padding: 6px 14px;
  border: 2px solid var(--text);
  background: var(--surface);
  color: var(--text);
  font-size: 1.55rem;
  font-variant-numeric: tabular-nums;
  font-weight: 750;
  line-height: 1;
}

.target-display.shape-target {
  font-size: 1.8rem;
}

.game-metrics {
  display: flex;
  margin: 0;
  border-left: 1px solid var(--line);
}

.game-metrics div {
  min-width: 92px;
  padding: 8px 16px;
  border-right: 1px solid var(--line);
}

.game-metrics dt {
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.game-metrics dd {
  margin: 8px 0 0;
  font-size: 1rem;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  white-space: nowrap;
}

.board-viewport {
  max-width: 100%;
  overflow: auto;
  background:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-color: var(--background);
  background-size: 40px 40px;
  scrollbar-gutter: stable;
}

.search-board {
  position: relative;
  width: 100%;
  min-width: 300px;
  height: 560px;
  min-height: 560px;
  isolation: isolate;
}

.question-board {
  position: absolute;
  inset: 0;
}

.question-board[hidden] {
  display: none;
}

.candidate-button {
  position: absolute;
  display: grid;
  place-items: center;
  width: var(--candidate-size);
  height: var(--candidate-size);
  padding: 0;
  border: 1px solid var(--text);
  border-radius: 0;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  font-size: 1.25rem;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  line-height: 1;
  text-align: center;
  user-select: none;
  touch-action: manipulation;
}

.candidate-button.shape-candidate {
  color: #1a1a1a;
  font-size: 1.35rem;
}

.shape-glyph {
  display: inline-block;
  line-height: 1;
  transform: scale(var(--shape-optical-scale, 1));
  transform-origin: center;
}

.candidate-button:hover {
  border-width: 2px;
}

.candidate-button.is-correct {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--accent-text);
}

.candidate-button.is-miss {
  outline: 2px solid var(--text);
  outline-offset: 2px;
}

.game-instruction {
  min-height: 48px;
  margin: 0;
  padding: 14px 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.82rem;
}

.result-screen {
  max-width: 820px;
  min-height: 640px;
  margin: 0 auto;
}

.result-heading {
  text-align: center;
}

.result-context {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 38px 0 30px;
}

.result-context div {
  text-align: center;
}

.result-context div + div {
  border-left: 1px solid var(--line);
}

.result-context dt,
.time-summary p,
.result-supporting dt {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.result-context dd {
  margin: 10px 0 0;
  font-size: clamp(1.25rem, 3vw, 1.8rem);
  font-weight: 700;
}

.time-summary {
  display: grid;
  justify-items: center;
  padding: 38px 20px;
  text-align: center;
}

.time-summary p {
  margin: 0;
}

.time-summary output {
  margin-top: 12px;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  letter-spacing: -0.05em;
}

.total-time-summary output {
  font-size: clamp(4.25rem, 12vw, 7.5rem);
  line-height: 1;
}

.best-time-summary output {
  font-size: clamp(2.25rem, 7vw, 4rem);
  line-height: 1.05;
}

.result-divider {
  height: 1px;
  background: var(--line-strong);
}

.result-supporting {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0;
}

.result-supporting div {
  min-width: 0;
  padding: 26px 20px;
  text-align: center;
}

.result-supporting div + div {
  border-left: 1px solid var(--line);
}

.result-supporting dd {
  margin: 12px 0 0;
  font-size: clamp(1.1rem, 2.6vw, 1.5rem);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.result-actions {
  display: grid;
  justify-items: center;
  gap: 14px;
  margin-top: 42px;
}

.replay-button {
  width: min(100%, 420px);
  min-height: 60px;
  font-size: 1.05rem;
}

.settings-button {
  min-width: 0;
  min-height: 44px;
  padding: 8px 16px;
  border-color: transparent;
}

@media (max-width: 1120px) {
  .game-toolbar {
    grid-template-columns: minmax(160px, 1fr) auto;
  }

  .game-metrics {
    grid-column: 1 / -1;
    grid-row: 2;
    border-top: 1px solid var(--line);
  }

  .game-metrics div {
    flex: 1 1 0;
  }
}

@media (max-width: 640px) {
  .app-header {
    min-height: 82px;
    padding: 14px 16px;
  }

  .language-control {
    min-width: 108px;
  }

  .language-control > span {
    display: none;
  }

  .language-control select {
    width: 108px;
    min-height: 40px;
  }

  body[data-screen="start"] .app-header {
    align-items: flex-end;
    min-height: 210px;
    padding: 38px 18px 52px;
  }

  body[data-screen="start"] .title-stage {
    width: 100%;
    padding-top: 16px;
  }

  body[data-screen="start"] .title-decoration {
    position: absolute;
    top: 50%;
    right: -32px;
    width: 112px;
    height: 112px;
    opacity: 0.82;
    transform: translateY(-42%);
  }

  .target-ring-outer {
    border-width: 15px;
  }

  .target-ring-inner {
    inset: 29px;
    border-width: 10px;
  }

  .title-token {
    width: 36px;
    height: 36px;
    border-radius: 11px;
    font-size: 0.88rem;
  }

  body[data-screen="start"] .title-copy {
    position: relative;
    z-index: 1;
  }

  body[data-screen="start"] .brand-kicker {
    margin-bottom: 8px;
    font-size: 0.65rem;
  }

  body[data-screen="start"] .brand-title {
    font-size: clamp(3.15rem, 15vw, 3.8rem);
  }

  body[data-screen="start"] .title-details {
    margin-top: 10px;
  }

  body[data-screen="start"] .language-control {
    position: absolute;
    top: 14px;
    right: 16px;
  }

  body[data-screen="start"] .app-layout {
    margin-top: -34px;
  }

  .app-layout {
    padding-inline: 12px;
  }

  .screen {
    min-height: 0;
    padding: 24px 18px;
  }

  .start-screen {
    padding: 22px 18px 24px;
  }

  .setup-grid {
    grid-template-columns: 1fr;
    gap: 16px;
    margin: 0;
  }

  .setup-group {
    gap: 10px;
  }

  .option-list {
    gap: 4px;
  }

  .option-card {
    min-height: 50px;
    padding-inline: 10px;
  }

  .start-screen .action-row {
    margin-top: 22px;
  }

  .start-screen .primary-button {
    min-height: 58px;
    min-width: 0;
    border-radius: 18px;
  }

  .game-screen {
    padding: 0;
  }

  .game-toolbar {
    grid-template-columns: 1fr auto;
    gap: 12px;
    padding: 12px;
  }

  .find-control {
    gap: 8px;
  }

  .target-display {
    min-width: 64px;
    min-height: 52px;
    font-size: 1.4rem;
  }

  .game-metrics {
    width: 100%;
  }

  .game-metrics div {
    min-width: 0;
    padding-inline: 10px;
  }

  .search-board {
    min-width: 300px;
  }

  .result-screen {
    padding-inline: 20px;
  }

  .result-context {
    margin-block: 32px 24px;
  }

  .time-summary {
    padding-block: 30px;
  }

  .result-supporting {
    grid-template-columns: 1fr;
  }

  .result-supporting div {
    padding-block: 18px;
  }

  .result-supporting div + div {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .primary-button,
  .secondary-button {
    flex: 1 1 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}

@media (forced-colors: active) {
  .option-card:has(input:checked) {
    outline: 3px solid Highlight;
    outline-offset: 2px;
  }

  .option-card input:checked {
    background: Highlight;
  }

  .candidate-button.is-correct {
    forced-color-adjust: none;
    background: Highlight;
    color: HighlightText;
  }
}