:root {
  color-scheme: light;
  --ink: oklch(27% 0.045 248);
  --ink-soft: oklch(42% 0.035 248);
  --navy: oklch(31% 0.075 248);
  --navy-strong: oklch(24% 0.075 248);
  --blue: oklch(53% 0.12 246);
  --teal: oklch(58% 0.105 181);
  --paper: oklch(98% 0.006 245);
  --surface: oklch(99.3% 0.004 245);
  --surface-blue: oklch(95% 0.018 245);
  --line: oklch(84% 0.023 245);
  --line-strong: oklch(69% 0.045 245);
  --error: oklch(47% 0.18 27);
  --error-bg: oklch(95% 0.035 27);
  --focus: oklch(66% 0.13 191);
  --radius: 6px;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --font-ui: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", system-ui, sans-serif;
}

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

html {
  min-width: 20rem;
  background: var(--paper);
  font-family: var(--font-ui);
  font-size: 100%;
  scroll-behavior: smooth;
  text-size-adjust: 100%;
}

body {
  min-width: 20rem;
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background-color: var(--paper);
  background-image: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent 47px,
    oklch(91% 0.012 245) 48px
  );
  font-size: 1rem;
  line-height: 1.5;
  font-kerning: normal;
}

button,
input {
  font: inherit;
}

button {
  touch-action: manipulation;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: var(--space-3);
  left: var(--space-3);
  padding: var(--space-3) var(--space-4);
  transform: translateY(-180%);
  color: var(--surface);
  background: var(--navy-strong);
  border-radius: var(--radius);
}

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

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

.site-header {
  color: var(--surface);
  background: var(--navy-strong);
  border-bottom: 4px solid var(--teal);
}

.header-inner,
.assessment-shell,
.site-footer {
  width: min(100% - 2rem, 48rem);
  margin-inline: auto;
}

.header-inner {
  display: flex;
  min-height: 5.25rem;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-4);
}

.eyebrow,
.site-title,
.privacy-badge,
.section-kicker,
.section-name,
.progress-count,
.question-number,
.question-help,
.result-label,
.score-note,
.section-intro,
.action-status,
.site-footer p,
.privacy-note p {
  margin: 0;
}

.eyebrow,
.section-kicker,
.result-label {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.eyebrow {
  color: oklch(82% 0.065 187);
}

.site-title {
  margin-top: var(--space-1);
  font-size: 1.25rem;
  font-weight: 720;
  letter-spacing: 0.02em;
}

.privacy-badge {
  flex: none;
  padding: var(--space-2) var(--space-3);
  color: oklch(92% 0.025 187);
  border: 1px solid oklch(68% 0.07 187);
  border-radius: 999px;
  font-size: 1rem;
  white-space: nowrap;
}

.assessment-shell {
  min-height: calc(100vh - 13rem);
  padding-block: var(--space-8) 7.5rem;
}

.progress-region {
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--line);
}

.progress-copy {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-3);
}

.section-kicker,
.result-label {
  color: var(--teal);
}

.section-name {
  margin-top: var(--space-1);
  font-size: 1.25rem;
  font-weight: 760;
}

.progress-count {
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.progress-divider {
  margin-inline: var(--space-2);
  color: var(--line-strong);
}

progress {
  display: block;
  width: 100%;
  height: 0.625rem;
  overflow: hidden;
  appearance: none;
  border: 0;
  border-radius: 999px;
  background: var(--surface-blue);
}

.progress-region progress {
  margin-top: var(--space-4);
}

progress::-webkit-progress-bar {
  background: var(--surface-blue);
  border-radius: 999px;
}

progress::-webkit-progress-value {
  background: var(--teal);
  border-radius: 999px;
}

progress::-moz-progress-bar {
  background: var(--teal);
  border-radius: 999px;
}

.question-panel {
  margin-top: var(--space-8);
  padding: clamp(1.25rem, 5vw, 2.5rem);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-top: 4px solid var(--navy);
  border-radius: var(--radius);
}

.question-fieldset {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.question-number {
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
}

.question-title {
  max-width: 26ch;
  margin: var(--space-4) 0 var(--space-2);
  overflow-wrap: anywhere;
  color: var(--navy-strong);
  font-size: clamp(1.5rem, 7vw, 2rem);
  line-height: 1.35;
  letter-spacing: -0.025em;
}

.question-title.statement {
  max-width: 31ch;
}

.question-help {
  color: var(--ink-soft);
}

.choice-list,
.scale-list {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.choice-card,
.scale-choice {
  display: grid;
  min-width: 0;
  min-height: 4rem;
  align-items: center;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 120ms cubic-bezier(0.25, 1, 0.5, 1), background-color 120ms cubic-bezier(0.25, 1, 0.5, 1), transform 120ms cubic-bezier(0.25, 1, 0.5, 1);
}

.choice-card {
  grid-template-columns: auto auto minmax(0, 1fr);
  gap: var(--space-3);
  padding: var(--space-4);
}

.choice-card input,
.scale-choice input {
  width: 1.25rem;
  height: 1.25rem;
  margin: 0;
  accent-color: var(--teal);
}

.choice-letter {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  color: var(--navy);
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  font-weight: 800;
  text-transform: uppercase;
}

.choice-text {
  min-width: 0;
  overflow-wrap: anywhere;
}

.scale-list {
  grid-template-columns: 1fr;
}

.scale-choice {
  grid-template-columns: auto 2.25rem minmax(0, 1fr);
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
}

.scale-number {
  color: var(--navy);
  font-size: 1.25rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  text-align: center;
}

.scale-label {
  min-width: 0;
  overflow-wrap: anywhere;
}

.choice-card:has(input:checked),
.scale-choice:has(input:checked) {
  background: oklch(94% 0.026 187);
  border-color: var(--teal);
  box-shadow: inset 4px 0 0 var(--teal);
}

.choice-card:active,
.scale-choice:active,
.button:active {
  transform: translateY(1px);
}

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

.answer-error {
  margin: var(--space-6) 0 0;
  padding: var(--space-3) var(--space-4);
  color: var(--error);
  background: var(--error-bg);
  border-left: 4px solid var(--error);
  font-weight: 650;
}

.answer-error[hidden] {
  display: none;
}

.question-nav {
  position: fixed;
  z-index: 10;
  right: 0;
  bottom: 0;
  left: 0;
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  gap: var(--space-3);
  padding: var(--space-3) max(1rem, env(safe-area-inset-right)) max(0.75rem, env(safe-area-inset-bottom)) max(1rem, env(safe-area-inset-left));
  background: var(--surface);
  border-top: 1px solid var(--line);
}

.button {
  min-height: 3rem;
  padding: var(--space-3) var(--space-4);
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 730;
  cursor: pointer;
  transition: background-color 120ms cubic-bezier(0.25, 1, 0.5, 1), border-color 120ms cubic-bezier(0.25, 1, 0.5, 1), transform 120ms cubic-bezier(0.25, 1, 0.5, 1);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.46;
}

.button-primary {
  color: var(--surface);
  background: var(--navy);
  border-color: var(--navy);
}

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

.button-secondary {
  color: var(--navy);
  background: var(--surface);
  border-color: var(--line-strong);
}

.button-secondary:hover {
  background: var(--surface-blue);
  border-color: var(--navy);
}

.button-quiet {
  color: var(--error);
  background: transparent;
  border-color: transparent;
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.privacy-note {
  margin-top: var(--space-6);
  color: var(--ink-soft);
}

.results-header {
  max-width: 40rem;
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--line);
}

.results-header h1 {
  margin: var(--space-2) 0 var(--space-3);
  color: var(--navy-strong);
  font-size: clamp(2rem, 9vw, 3rem);
  line-height: 1.2;
}

.results-header > p:last-child,
.section-intro {
  color: var(--ink-soft);
}

.mbti-result,
.interaction-results,
.diagnostic-note {
  margin-top: var(--space-12);
}

.type-lockup {
  display: grid;
  gap: var(--space-6);
  margin-top: var(--space-4);
  padding-block: var(--space-6);
  border-block: 1px solid var(--line-strong);
}

.type-lockup p {
  margin: 0;
}

.type-lockup h2 {
  margin: var(--space-2) 0 0;
  color: var(--navy-strong);
  font-size: clamp(3.25rem, 18vw, 5.5rem);
  line-height: 0.95;
  letter-spacing: 0.05em;
}

.type-description {
  align-self: end;
  max-width: 32rem;
  font-size: 1.125rem;
  line-height: 1.65;
}

.dimensions {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.dimension-row {
  display: grid;
  grid-template-columns: minmax(3.25rem, auto) minmax(0, 1fr) minmax(3.25rem, auto);
  align-items: center;
  gap: var(--space-3);
}

.dimension-score {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  font-variant-numeric: tabular-nums;
}

.dimension-score span {
  color: var(--navy);
  font-weight: 800;
}

.dimension-score strong {
  font-size: 1.25rem;
}

.align-end {
  justify-content: end;
}

.dimension-track progress {
  height: 0.75rem;
}

.score-note {
  margin-top: var(--space-4);
  color: var(--ink-soft);
}

.interaction-results h2,
.diagnostic-note h2 {
  margin: var(--space-2) 0 var(--space-3);
  color: var(--navy-strong);
  font-size: 1.75rem;
}

.interaction-result {
  padding-block: var(--space-6);
  border-bottom: 1px solid var(--line);
}

.interaction-result:first-of-type {
  margin-top: var(--space-4);
  border-top: 1px solid var(--line);
}

.result-row-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
}

.result-row-heading h3,
.result-row-heading p,
.interaction-result > p,
.diagnostic-note p {
  margin: 0;
}

.result-row-heading h3 {
  font-size: 1.25rem;
}

.result-row-heading strong {
  color: var(--navy);
  font-size: 1.5rem;
  font-variant-numeric: tabular-nums;
}

.level-badge {
  display: inline-block;
  margin-left: var(--space-2);
  padding: 0.125rem var(--space-2);
  color: var(--navy);
  background: var(--surface-blue);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-weight: 700;
}

.interaction-result progress {
  margin-block: var(--space-4);
}

.interaction-result > p {
  color: var(--ink-soft);
}

.diagnostic-note {
  padding: var(--space-6);
  background: var(--surface-blue);
  border-left: 4px solid var(--blue);
}

.result-actions {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-8);
}

.action-status {
  min-height: 1.5rem;
  margin-top: var(--space-3);
  color: var(--ink-soft);
}

.site-footer {
  display: grid;
  gap: var(--space-2);
  padding-block: var(--space-6) calc(var(--space-6) + env(safe-area-inset-bottom));
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
}

.loading-state,
.noscript-message {
  padding: var(--space-6);
  background: var(--surface);
  border: 1px solid var(--line);
}

.noscript-message {
  width: min(100% - 2rem, 48rem);
  margin: var(--space-6) auto;
  color: var(--error);
}

.clipboard-fallback {
  position: fixed;
  top: -100vh;
  left: -100vw;
}

.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;
}

@media (hover: hover) {
  .choice-card:hover,
  .scale-choice:hover {
    border-color: var(--blue);
    transform: translateY(-1px);
  }
}

@media (min-width: 40rem) {
  .header-inner,
  .assessment-shell,
  .site-footer {
    width: min(100% - 3rem, 48rem);
  }

  .assessment-shell {
    padding-block: var(--space-12);
  }

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

  .question-nav {
    position: static;
    grid-template-columns: 1fr 1.35fr;
    max-width: 26rem;
    margin: var(--space-6) 0 0 auto;
    padding: 0;
    background: transparent;
    border: 0;
  }

  .type-lockup {
    grid-template-columns: minmax(12rem, 0.8fr) minmax(0, 1.2fr);
  }

  .result-actions {
    grid-template-columns: 1.2fr 1fr 1fr;
  }
}

@media (min-width: 52rem) {
  .question-panel {
    padding: var(--space-12);
  }
}

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

@media print {
  body {
    background: var(--surface);
  }

  .site-header,
  .site-footer,
  .question-nav,
  .result-actions,
  .action-status {
    display: none !important;
  }

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