:root {
  --paper: #f4f0e7;
  --paper-deep: #e8e1d3;
  --ink: #182026;
  --muted: #677076;
  --line: #c9c2b4;
  --blue: #1d4e63;
  --blue-light: #dce8e8;
  --ochre: #b46e2d;
  --white: #fcfaf5;
  --shadow: 0 20px 60px rgba(36, 34, 29, 0.08);
  --serif: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Noto Sans CJK SC", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 4%, rgba(180, 110, 45, 0.08), transparent 22rem),
    linear-gradient(90deg, rgba(29, 78, 99, 0.025) 1px, transparent 1px),
    var(--paper);
  background-size: auto, 24px 24px, auto;
  font-family: var(--sans);
  line-height: 1.65;
}

button { font: inherit; }

button:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(180, 110, 45, 0.65);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 12px;
  left: 12px;
  transform: translateY(-150%);
  padding: 8px 14px;
  color: var(--white);
  background: var(--ink);
}

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

.site-header,
main {
  width: min(1160px, calc(100% - 48px));
  margin-inline: auto;
}

body:not([data-view="intro"]) .site-header { display: none; }

.site-header {
  display: flex;
  align-items: center;
  min-height: 68px;
}

.brand {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.brand-mark { color: var(--ochre); font-size: 26px; }
.intro-view {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.86fr);
  gap: 70px;
  padding: 58px 0 72px;
}

.intro-copy { padding-top: 28px; }
.eyebrow,
.small-label {
  margin: 0 0 16px;
  color: var(--ochre);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.intro-copy h1,
.result-hero h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(42px, 5.3vw, 72px);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: -0.035em;
}

.lede {
  max-width: 580px;
  margin: 32px 0 0;
  color: #424b50;
  font-size: 19px;
  line-height: 1.9;
}

.version-picker {
  position: relative;
  padding: 24px;
  border: 1px solid var(--line);
  background: rgba(252, 250, 245, 0.6);
}

.picker-heading { margin-bottom: 20px; }
.picker-heading h2 { margin: 0 0 4px; font-family: var(--serif); font-size: 24px; }
.picker-heading p,
.section-heading p { margin: 0; color: var(--muted); font-size: 14px; }

.version-option {
  position: relative;
  display: grid;
  grid-template-columns: 70px 1fr auto;
  gap: 2px 16px;
  width: 100%;
  padding: 22px 10px;
  color: var(--ink);
  text-align: left;
  border: 0;
  border-top: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
  transition: background-color 160ms ease, padding 160ms ease;
}

.version-option:last-child { border-bottom: 1px solid var(--line); }
.version-option:hover { padding-inline: 16px; background: var(--blue-light); }
.version-meta { grid-row: span 2; color: var(--ochre); font-family: var(--serif); font-size: 18px; }
.version-name { font-size: 18px; font-weight: 700; }
.version-desc { grid-column: 2; color: var(--muted); font-size: 13px; }
.version-action { grid-row: span 2; align-self: center; color: var(--blue); font-weight: 700; font-size: 14px; }
.recommended-label {
  position: absolute;
  top: -1px;
  right: 8px;
  padding: 1px 8px;
  color: var(--white);
  background: var(--blue);
  font-size: 10px;
  letter-spacing: 0.1em;
}

.test-view {
  width: min(780px, 100%);
  min-height: 100dvh;
  margin: 0 auto;
  padding: 22px 0 92px;
}

.test-toolbar { display: flex; min-height: 42px; align-items: center; justify-content: space-between; }
.icon-button {
  display: inline-grid;
  width: 42px;
  height: 42px;
  padding: 0;
  place-items: center;
  color: var(--muted);
  border: 0;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  font-size: 28px;
  line-height: 1;
}
.icon-button:hover { color: var(--ink); background: rgba(24, 32, 38, 0.05); }
.progress-copy { color: var(--muted); font-variant-numeric: tabular-nums; }
.progress-track { height: 2px; margin-top: 8px; overflow: hidden; background: var(--paper-deep); }
.progress-track span { display: block; width: 0; height: 100%; background: var(--ochre); transition: width 220ms ease; }

.question-card { padding: 44px 0 36px; }
.question-card h1 { margin: 0; color: #343c41; font-family: inherit; font-size: 20px; font-weight: 500; line-height: 1.65; white-space: pre-line; }
.question-card h1:focus,
.result-hero h1:focus { outline: none; }

.question-arguments {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 22px;
}

.argument {
  padding: 16px 18px;
  border-left: 3px solid var(--line);
  background: rgba(252, 250, 245, 0.56);
}

.argument:first-child { border-color: var(--blue); }
.argument:last-child { border-color: var(--ochre); }
.argument-label { display: block; margin-bottom: 6px; color: var(--muted); font-size: 12px; font-weight: 700; }
.argument p { margin: 0; }

.answer-options { display: grid; gap: 10px; margin-top: 22px; }
.likert-options { grid-template-columns: repeat(5, 1fr); }
.answer-button {
  min-height: 58px;
  padding: 12px 14px;
  color: var(--ink);
  text-align: left;
  border: 1px solid var(--line);
  background: rgba(252, 250, 245, 0.72);
  cursor: pointer;
  transition: border-color 140ms ease, background-color 140ms ease, transform 140ms ease;
}

.answer-button:hover { border-color: var(--blue); transform: translateY(-1px); }
.answer-button[aria-pressed="true"] { color: var(--white); border-color: var(--blue); background: var(--blue); }
.answer-key { display: inline-flex; align-items: center; justify-content: center; width: 28px; height: 28px; margin-right: 10px; border: 1px solid currentColor; border-radius: 50%; font-size: 12px; }
.likert-options .answer-button { text-align: center; font-size: 13px; }
.question-nav {
  position: relative;
  display: flex;
  justify-content: center;
  gap: 16px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.question-nav .secondary-button { position: absolute; left: 0; }
.primary-button,
.secondary-button {
  min-width: 132px;
  min-height: 48px;
  padding: 11px 22px;
  border: 1px solid var(--blue);
  cursor: pointer;
}

.primary-button { color: var(--white); background: var(--blue); }
.primary-button:hover:not(:disabled) { background: #153d4e; }
.primary-button:disabled { color: #939693; border-color: var(--line); background: var(--paper-deep); cursor: not-allowed; }
.secondary-button { color: var(--blue); background: transparent; }
.secondary-button:hover:not(:disabled) { background: var(--blue-light); }
.secondary-button:disabled { visibility: hidden; }

.analysis-view {
  display: grid;
  min-height: 100dvh;
  place-items: center;
  text-align: center;
}

.analysis-content { padding: 60px 20px 110px; }
.analysis-content .eyebrow { margin-top: 28px; }
.analysis-content h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 600;
}

.analysis-content h1:focus { outline: none; }

.analysis-spinner {
  width: 62px;
  height: 62px;
  margin: 0 auto;
  border: 2px solid var(--line);
  border-top-color: var(--blue);
  border-radius: 50%;
  animation: spin 850ms linear infinite;
}

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

.result-view { padding: 82px 0 96px; }
.result-hero { max-width: 850px; padding-bottom: 70px; }
.result-code { margin: 0 0 8px; color: var(--blue); font-size: 18px; font-weight: 700; letter-spacing: 0.24em; }
.result-portrait { max-width: 720px; margin: 28px 0 0; color: #3f484d; font-size: 20px; line-height: 1.8; }
.result-section { display: grid; grid-template-columns: 270px 1fr; gap: 52px; padding: 54px 0; border-top: 1px solid var(--line); }
.section-heading { display: grid; grid-template-columns: 38px 1fr; gap: 12px; align-content: start; }
.section-heading .section-index { color: var(--ochre); font-family: var(--serif); font-size: 18px; }
.section-heading h2 { margin: 0 0 8px; font-family: var(--serif); font-size: 25px; line-height: 1.3; }

.axes-result { display: grid; gap: 26px; }
.axis-row { display: grid; gap: 8px; }
.axis-top { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; }
.axis-name { font-weight: 700; }
.axis-track { position: relative; height: 2px; margin: 12px 8px 5px; background: var(--line); }
.axis-track::before { content: ""; position: absolute; top: -4px; bottom: -4px; left: 50%; border-left: 1px solid rgba(103, 112, 118, 0.4); }
.axis-marker { position: absolute; top: 50%; left: var(--position); width: 16px; height: 16px; transform: translate(-50%, -50%); border: 3px solid var(--paper); border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 1px var(--blue); }
.axis-labels { display: flex; justify-content: space-between; color: var(--muted); font-size: 12px; }
.axis-labels strong { color: var(--ink); font-variant-numeric: tabular-nums; }

.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; }
.detail-grid h3 { margin: 0 0 8px; color: var(--blue); font-size: 14px; }
.detail-grid p { margin: 0; }
.type-detail blockquote { grid-column: 2; margin: 30px 0 0; padding: 22px 26px; border-left: 3px solid var(--ochre); background: rgba(252, 250, 245, 0.62); font-family: var(--serif); font-size: 20px; }

.auxiliary-result { display: grid; gap: 28px; }
.aux-row { display: grid; grid-template-columns: 100px 1fr; gap: 20px; align-items: start; }
.aux-row h3 { margin: 2px 0 0; font-size: 14px; }
.distribution { display: flex; height: 9px; overflow: hidden; background: var(--paper-deep); }
.distribution span:nth-child(1) { background: #1d4e63; }
.distribution span:nth-child(2) { background: #5d8794; }
.distribution span:nth-child(3) { background: #b46e2d; }
.distribution span:nth-child(4) { background: #d7a064; }
.distribution span:nth-child(5) { background: #8e7966; }
.distribution-labels { display: flex; flex-wrap: wrap; gap: 8px 16px; margin-top: 8px; color: var(--muted); font-size: 12px; }
.distribution-labels strong { color: var(--ink); }

.philosopher-layout { display: grid; grid-template-columns: minmax(190px, 0.42fr) 1fr; gap: 42px; }
.philosopher-name-block h3 { margin: 0 0 20px; font-family: var(--serif); font-size: 36px; }
.philosopher-name-block .also-close { margin: -10px 0 18px; }
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.tag { padding: 4px 9px; color: var(--blue); border: 1px solid rgba(29, 78, 99, 0.35); font-size: 12px; }
.philosopher-copy > p:first-child { margin-top: 0; font-size: 18px; }
.philosopher-copy ul { padding-left: 20px; }
.also-close { color: var(--muted); font-size: 13px; }
.also-close:empty { display: none; }
.result-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; padding-top: 58px; border-top: 1px solid var(--line); }

.share-view { min-height: 100dvh; padding: 34px 0 72px; }
.share-shell { width: min(680px, 100%); min-width: 0; margin: 0 auto; }
.share-back {
  padding: 8px 0;
  color: var(--blue);
  border: 0;
  background: transparent;
  cursor: pointer;
  font-weight: 700;
}
.share-heading { padding: 34px 0 28px; text-align: center; }
.share-heading .eyebrow { margin-bottom: 10px; }
.share-heading h1 { margin: 0; font-family: var(--serif); font-size: 42px; line-height: 1.25; }
.share-heading h1:focus { outline: none; }
.share-heading > p:last-child { margin: 12px 0 0; color: var(--muted); }
.share-preview {
  display: grid;
  min-width: 0;
  min-height: 420px;
  padding: 18px;
  overflow: hidden;
  place-items: center;
  border: 1px solid var(--line);
  background: rgba(252, 250, 245, 0.58);
  box-shadow: var(--shadow);
}
.share-preview p { margin: 0; color: var(--muted); }
.share-image { display: block; width: 540px; max-width: 100%; height: auto; }
.share-actions { display: flex; justify-content: center; margin-top: 24px; }
.share-feedback { min-height: 1.65em; margin: 10px 0 0; color: var(--blue); text-align: center; font-size: 13px; }

[hidden] { display: none !important; }

@media (max-width: 900px) {
  .intro-view { grid-template-columns: 1fr; gap: 48px; padding-top: 60px; }
  .intro-copy { padding-top: 0; }
  .result-section { grid-template-columns: 1fr; gap: 30px; }
  .section-heading { max-width: 560px; }
  .type-detail blockquote { grid-column: 1; }
}

@media (max-width: 640px) {
  .site-header,
  main { width: min(100% - 28px, 1160px); }
  .site-header { min-height: 56px; }
  .brand { font-size: 18px; }
  .brand-mark { font-size: 22px; }
  .intro-view { padding: 28px 0 44px; }
  .intro-copy h1,
  .result-hero h1 { font-size: 36px; }
  .lede { margin-top: 22px; font-size: 17px; }
  .version-picker { padding: 18px 14px; }
  .version-option { grid-template-columns: 56px 1fr; padding: 20px 6px; }
  .version-action { grid-column: 2; grid-row: auto; margin-top: 7px; }
  .recommended-label { right: 0; }
  .test-view { width: 100%; padding: 4px 0 76px; }
  .test-toolbar { min-height: 32px; }
  .icon-button { width: 32px; height: 32px; font-size: 24px; }
  .progress-copy { font-size: 13px; }
  .progress-track { margin-top: 2px; }
  .question-card { padding: 14px 0 18px; }
  .question-card h1 { font-size: 16px; line-height: 1.55; }
  .question-arguments { grid-template-columns: 1fr 1fr; gap: 6px; margin-top: 12px; }
  .argument { padding: 9px 10px; font-size: 13px; line-height: 1.5; }
  .argument-label { margin-bottom: 3px; font-size: 10px; }
  .answer-options { gap: 6px; margin-top: 12px; }
  .answer-button { min-height: 44px; padding: 8px 10px; font-size: 13px; line-height: 1.4; }
  .likert-options { grid-template-columns: 1fr; gap: 5px; }
  .likert-options .answer-button { min-height: 44px; padding: 7px 12px; text-align: left; font-size: 13px; line-height: 1.35; }
  .question-nav {
    position: fixed;
    z-index: 4;
    right: 0;
    bottom: 0;
    left: 0;
    margin: 0;
    padding: 12px 14px max(12px, env(safe-area-inset-bottom));
    border-top-color: rgba(201, 194, 180, 0.75);
    background: rgba(244, 240, 231, 0.97);
    backdrop-filter: blur(8px);
  }
  .question-nav .primary-button,
  .question-nav .secondary-button { min-width: 116px; }
  .question-nav .secondary-button { left: 14px; }

  .result-view { padding-top: 54px; }
  .result-hero { padding-bottom: 48px; }
  .result-portrait { font-size: 17px; }
  .result-section { padding: 42px 0; }
  .result-actions { flex-direction: column; }
  .result-actions .primary-button,
  .result-actions .secondary-button { width: 100%; }
  .detail-grid,
  .philosopher-layout { grid-template-columns: 1fr; gap: 26px; }
  .aux-row { grid-template-columns: 1fr; gap: 8px; }
  .share-view { padding: 18px 0 48px; }
  .share-heading { padding: 24px 0 20px; }
  .share-heading h1 { font-size: 32px; }
  .share-heading > p:last-child { font-size: 13px; }
  .share-preview { min-height: 360px; padding: 8px; }
  .share-actions .primary-button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
  .analysis-spinner { animation: none; }
}