/* Design tokens. Single source of truth for the static pages and the app.
 *
 * Type scale: minor third (1.2) on mobile, major third (1.25) from 40rem,
 * anchored at 17px body. Spacing is a 4px base in named steps so the vertical
 * rhythm survives a font change.
 */

:root {
  /* ── ink and ground ───────────────────────────────────────────────── */
  --ink: #17181b;
  --ink-soft: #4d5058;
  --ink-faint: #767981;
  --paper: #fbfaf8;
  --card: #ffffff;
  --rule: #e4e2dd;
  --rule-strong: #cfccc5;

  --accent: #2d5b4e;
  --accent-ink: #ffffff;
  --accent-soft: #e7efeb;

  --warn: #7f4526;
  --warn-soft: #f9efe8;

  /* ── type ─────────────────────────────────────────────────────────── */
  --serif: "Source Serif 4 Variable", ui-serif, Georgia, Charter, "Times New Roman", serif;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --size-display: 1.95rem;
  --size-title: 1.6rem;
  --size-section: 1.25rem;
  --size-sub: 1.05rem;
  --size-lede: 1.15rem;
  --size-body: 1rem;
  --size-small: 0.875rem;
  --size-label: 0.75rem;

  --leading-display: 1.12;
  --leading-title: 1.2;
  --leading-heading: 1.28;
  --leading-lede: 1.5;
  --leading-body: 1.65;

  --tracking-display: -0.02em;
  --tracking-title: -0.015em;
  --tracking-label: 0.08em;

  /* ── spacing (4px base) ───────────────────────────────────────────── */
  --s1: 0.25rem;
  --s2: 0.5rem;
  --s3: 0.75rem;
  --s4: 1rem;
  --s6: 1.5rem;
  --s8: 2rem;
  --s12: 3rem;
  --s16: 4rem;
  --s24: 6rem;

  /* ── other ────────────────────────────────────────────────────────── */
  --measure: 34rem; /* ~62ch at body size */
  --measure-wide: 46rem;
  --radius: 10px;
  --radius-sm: 5px;
  --tap: 44px;

  color-scheme: light;
}

@media (min-width: 40rem) {
  :root {
    --size-display: 2.6rem;
    --size-title: 1.9rem;
    --size-section: 1.4rem;
    --size-sub: 1.1rem;
    --size-lede: 1.25rem;
    --size-body: 1.0625rem;
    --size-small: 0.9rem;
    --size-label: 0.78rem;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eeece8;
    --ink-soft: #b3b6bd;
    --ink-faint: #85888f;
    --paper: #131419;
    --card: #1a1c22;
    --rule: #2b2e36;
    --rule-strong: #3c404a;

    --accent: #8cc0ae;
    --accent-ink: #10201b;
    --accent-soft: #1d2b26;

    --warn: #e6a878;
    --warn-soft: #2b2119;

    color-scheme: dark;
  }
}

/* Element defaults built on the tokens. No component classes here. */

@font-face {
  font-family: "Source Serif 4 Variable";
  font-style: normal;
  font-display: swap;
  font-weight: 200 900;
  src: url("/fonts/source-serif-4-latin.woff2") format("woff2-variations");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+2074, U+20AC, U+2122, U+2191,
    U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: var(--size-body);
  line-height: var(--leading-body);
  font-synthesis-weight: none;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4,
h5 {
  font-weight: 600;
  text-wrap: balance;
  margin: 0;
}

h1 {
  font-size: var(--size-title);
  line-height: var(--leading-title);
  letter-spacing: var(--tracking-title);
}

h2 {
  font-size: var(--size-section);
  line-height: var(--leading-heading);
}

h3 {
  font-size: var(--size-sub);
  line-height: var(--leading-heading);
}

h4 {
  font-family: var(--sans);
  font-size: var(--size-label);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
  color: var(--ink-faint);
}

p {
  margin: 0 0 var(--s4);
  text-wrap: pretty;
}

a {
  color: var(--accent);
  text-underline-offset: 0.18em;
  text-decoration-thickness: from-font;
}

a:hover {
  text-decoration-thickness: 2px;
}

strong,
b {
  font-weight: 650;
}

ul,
ol {
  padding-left: 1.15rem;
  margin: 0 0 var(--s4);
}

li {
  margin-bottom: var(--s2);
}

li::marker {
  color: var(--ink-faint);
}

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: var(--s8) 0;
}

code {
  font-family: var(--mono);
  font-size: 0.9em;
}

button,
input,
select {
  font: inherit;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

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

/* ── print ──────────────────────────────────────────────────────────────
 * People will print or PDF their results. Keep the caveats, drop the
 * controls, and expand anything that was behind a toggle.
 */
@media print {
  :root {
    --paper: #fff;
    --card: #fff;
    --ink: #000;
    --ink-soft: #333;
    --ink-faint: #555;
    --rule: #bbb;
    --accent: #000;
    --accent-soft: #f2f2f2;
  }

  body {
    font-size: 11pt;
  }

  button,
  .page-nav,
  .results-nav,
  .flag,
  .evidence-toggle,
  nav.foot {
    display: none !important;
  }

  .evidence-body {
    display: block !important;
  }

  .scale-card,
  .callout,
  .grid-cell {
    break-inside: avoid;
  }

  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 9pt;
    color: #555;
    word-break: break-all;
  }
}

/* Shared component vocabulary: used by the static pages and the app, so a
 * kicker or a callout looks the same wherever it appears. */

/* ── skip link ──────────────────────────────────────────────────────── */

.skip {
  position: absolute;
  left: -9999px;
  top: var(--s2);
  background: var(--card);
  color: var(--ink);
  font-family: var(--sans);
  font-size: var(--size-small);
  padding: var(--s3) var(--s4);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  z-index: 100;
}

.skip:focus {
  left: var(--s4);
}

/* ── site header ────────────────────────────────────────────────────── */

.site-head {
  max-width: var(--measure);
  margin: 0 auto;
  padding: var(--s6) var(--s4) 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--s3) var(--s6);
  font-family: var(--sans);
  font-size: var(--size-small);
}

.wordmark {
  font-weight: 650;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.site-head nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s3) var(--s4);
}

.site-head nav a {
  color: var(--ink-faint);
  text-decoration: none;
}

.site-head nav a:hover {
  color: var(--ink);
  text-decoration: underline;
}

.site-head nav a[aria-current="page"] {
  color: var(--ink);
}

/* ── layout ─────────────────────────────────────────────────────────── */

.wrap {
  max-width: var(--measure);
  margin: 0 auto;
  padding: var(--s12) var(--s4) var(--s16);
}

.site-foot {
  padding-top: 0;
  padding-bottom: var(--s16);
}

.read-next {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s3);
  margin-top: var(--s12);
  border-top: 1px solid var(--rule);
  padding-top: var(--s6);
}

.wrap-wide {
  max-width: var(--measure-wide);
}

/* ── page head ──────────────────────────────────────────────────────── */

.kicker {
  font-family: var(--sans);
  font-size: var(--size-label);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
  color: var(--ink-faint);
  margin: 0 0 var(--s3);
}

.display {
  font-size: var(--size-display);
  line-height: var(--leading-display);
  letter-spacing: var(--tracking-display);
  margin: 0 0 var(--s4);
}

.lede {
  font-size: var(--size-lede);
  line-height: var(--leading-lede);
  color: var(--ink-soft);
  margin-bottom: var(--s6);
}

.meta {
  font-family: var(--sans);
  font-size: var(--size-small);
  color: var(--ink-faint);
  display: flex;
  flex-wrap: wrap;
  gap: var(--s3);
  margin-bottom: var(--s8);
}

.meta .sep::before {
  content: "·";
  margin-right: var(--s3);
}

/* ── sections ───────────────────────────────────────────────────────── */

.section {
  border-top: 1px solid var(--rule);
  margin-top: var(--s12);
  padding-top: var(--s6);
}

.section > h2 {
  margin-bottom: var(--s4);
}

/* One sentence a section turns on. A claim, not a quotation. */
.pull {
  font-size: var(--size-lede);
  line-height: 1.45;
  color: var(--ink);
  border-left: 3px solid var(--accent);
  padding-left: var(--s4);
  margin: var(--s8) 0;
}

/* ── callouts ───────────────────────────────────────────────────────── */

.callout {
  border-left: 3px solid var(--rule-strong);
  background: var(--card);
  padding: var(--s4) var(--s4) var(--s1);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: var(--s6) 0;
  font-size: var(--size-small);
}

.callout > h4 {
  margin-bottom: var(--s2);
}

.callout-evidence {
  border-left-color: var(--accent);
  background: var(--accent-soft);
}

.callout-caveat {
  border-left-color: var(--warn);
  background: var(--warn-soft);
}

.callout-practical {
  border-left-color: var(--ink-faint);
}

/* ── evidence grades ────────────────────────────────────────────────── */

.grade {
  display: inline-block;
  font-family: var(--sans);
  font-size: var(--size-label);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.1em 0.5em;
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius-sm);
  color: var(--ink-faint);
  white-space: nowrap;
}

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

.grade-none {
  font-style: normal;
  opacity: 0.8;
}

/* ── the band display ───────────────────────────────────────────────────
 * A dot on a centred track, NOT a filled bar. A filled bar reads as
 * "percentage of a maximum", which is the population comparison this test
 * deliberately refuses to make. The centre tick is the person's own profile
 * mean, so the only available reading is the correct one.
 */

.track {
  position: relative;
  height: var(--s6);
  margin: var(--s3) 0 var(--s4);
}

.track-line {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--rule-strong);
}

.track-centre {
  position: absolute;
  top: 25%;
  bottom: 25%;
  left: 50%;
  width: 1px;
  background: var(--ink-faint);
}

.track-dot {
  position: absolute;
  top: 50%;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--accent);
  transform: translate(-50%, -50%);
  transition: left 0.25s ease;
}

.track-ends {
  display: flex;
  justify-content: space-between;
  font-family: var(--sans);
  font-size: var(--size-label);
  color: var(--ink-faint);
  margin-top: calc(var(--s6) * -1);
  padding-top: var(--s6);
}

/* ── tables ─────────────────────────────────────────────────────────────
 * The scoring tables are the single most useful thing on the pillar page for
 * someone who arrived looking for the original rules, so they get real styling
 * rather than browser defaults. Wrapped for horizontal scroll on phones.
 */

.table-wrap {
  /* max-width is load-bearing: without it the table's min-content width leaks
     out and scrolls the whole page sideways on a phone instead of scrolling
     inside its own box. */
  max-width: 100%;
  overflow-x: auto;
  margin: var(--s6) 0;
  -webkit-overflow-scrolling: touch;
}

table {
  border-collapse: collapse;
  width: 100%;
  font-family: var(--sans);
  font-size: var(--size-small);
  line-height: 1.45;
}

thead th {
  text-align: left;
  font-weight: 600;
  font-size: var(--size-label);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  border-bottom: 1px solid var(--rule-strong);
  padding: 0 var(--s4) var(--s2) 0;
  /* Headers wrap rather than forcing a wide min-content on small screens. */
  text-wrap: balance;
}

tbody td {
  border-bottom: 1px solid var(--rule);
  padding: var(--s3) var(--s4) var(--s3) 0;
  vertical-align: top;
}

tbody tr:last-child td {
  border-bottom: 0;
}

td:last-child,
th:last-child {
  padding-right: 0;
}

/* Numeric-looking first columns read better aligned and tabular. */
tbody td:first-child {
  font-variant-numeric: tabular-nums;
  color: var(--ink);
}

/* ── tables of contents and footnotes ───────────────────────────────── */

.toc {
  font-family: var(--sans);
  font-size: var(--size-small);
  border-left: 2px solid var(--rule);
  padding-left: var(--s4);
  margin: var(--s6) 0 var(--s8);
}

.toc ol {
  list-style: none;
  padding: 0;
  margin: var(--s2) 0 0;
}

.toc li {
  margin-bottom: var(--s1);
}

.footnotes {
  border-top: 1px solid var(--rule);
  margin-top: var(--s12);
  padding-top: var(--s6);
  font-size: var(--size-small);
  color: var(--ink-soft);
}

.footnotes ol {
  padding-left: 1.3rem;
}

a.fn {
  font-size: 0.72em;
  vertical-align: super;
  text-decoration: none;
  padding: 0 0.1em;
}

/* ── source list ────────────────────────────────────────────────────── */

.sources {
  list-style: none;
  padding: 0;
  font-size: var(--size-small);
}

.sources li {
  border-left: 2px solid var(--rule);
  padding-left: var(--s4);
  margin-bottom: var(--s4);
}

.sources .claim {
  display: block;
  color: var(--ink-faint);
  margin-top: var(--s1);
}

/* ── buttons and links ──────────────────────────────────────────────── */

/* One selector, not `.btn, button.btn`: the element-qualified form has higher
   specificity (0-1-1) than `.btn-primary` (0-1-0), so it silently beat the
   primary background on <button> elements while working fine on <a>. Every
   property is set explicitly here, so no UA-style tiebreaker is needed. */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s2);
  font-family: var(--sans);
  font-size: var(--size-body);
  min-height: var(--tap);
  padding: var(--s3) var(--s6);
  /* Quieter than the old --rule-strong: the secondary action shouldn't compete
     with the primary one sitting next to it. */
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: transparent;
  color: var(--ink);
  text-decoration: none;
  cursor: pointer;
  transition:
    border-color 0.12s ease,
    background 0.12s ease;
}

.btn:hover {
  border-color: var(--ink-faint);
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

.btn-primary:hover {
  border-color: var(--accent);
  filter: brightness(1.08);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* The primary action keeps its colour while disabled. At 0.45 opacity the green
   washed out to grey, which read as "this button is broken" rather than "finish
   the page first". */
.btn-primary:disabled {
  opacity: 1;
  background: color-mix(in oklab, var(--accent) 38%, var(--paper));
  border-color: color-mix(in oklab, var(--accent) 38%, var(--paper));
  color: color-mix(in oklab, var(--accent-ink) 70%, transparent);
}

/* ── footer nav ─────────────────────────────────────────────────────── */

.foot-nav {
  border-top: 1px solid var(--rule);
  margin-top: var(--s16);
  padding-top: var(--s6);
  font-family: var(--sans);
  font-size: var(--size-small);
  display: flex;
  gap: var(--s6);
  flex-wrap: wrap;
}

.colophon {
  color: var(--ink-faint);
  font-size: var(--size-small);
  margin-top: var(--s4);
}