/* ==========================================================================
   Kiz Survey Analysis: shared styles
   Sober editorial system. Neutral warm palette, one restrained accent.
   Light + dark themes. No external dependencies.
   ========================================================================== */

:root {
  /* Light theme */
  --bg: #f6f4ef;
  --surface: #fffdf8;
  --surface-2: #efece4;
  --ink: #22201c;
  --ink-soft: #55514a;
  --ink-faint: #8a857c;
  --line: #e0dcd2;
  --line-strong: #cfc9bc;
  --accent: #7a5c3e;         /* muted umber */
  --accent-soft: #efe6d9;
  --link: #6b4f34;

  /* Grade colors: muted, topic is serious */
  --grade-a: #3f6b4a;
  --grade-a-bg: #e4ede4;
  --grade-b: #5a6a3a;
  --grade-b-bg: #eaecdd;
  --grade-c: #8a6a2f;
  --grade-c-bg: #f0e7d3;
  --grade-d: #9a4436;
  --grade-d-bg: #f0dcd6;

  --maxw: 780px;
  --maxw-wide: 1040px;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "SFMono-Regular", ui-monospace, "JetBrains Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17161350;
    --bg: #1a1815;
    --surface: #211f1b;
    --surface-2: #262420;
    --ink: #ece8e0;
    --ink-soft: #b6b0a5;
    --ink-faint: #857f74;
    --line: #332f29;
    --line-strong: #423d35;
    --accent: #c9a37a;
    --accent-soft: #2e2820;
    --link: #d8b58c;
    --grade-a: #8fc09a;
    --grade-a-bg: #223026;
    --grade-b: #b6c489;
    --grade-b-bg: #2a2e1f;
    --grade-c: #d3ab63;
    --grade-c-bg: #322a1a;
    --grade-d: #e0897a;
    --grade-d-bg: #33211d;
  }
}
:root[data-theme="dark"] {
  --bg: #1a1815; --surface: #211f1b; --surface-2: #262420;
  --ink: #ece8e0; --ink-soft: #b6b0a5; --ink-faint: #857f74;
  --line: #332f29; --line-strong: #423d35;
  --accent: #c9a37a; --accent-soft: #2e2820; --link: #d8b58c;
  --grade-a: #8fc09a; --grade-a-bg: #223026;
  --grade-b: #b6c489; --grade-b-bg: #2a2e1f;
  --grade-c: #d3ab63; --grade-c-bg: #322a1a;
  --grade-d: #e0897a; --grade-d-bg: #33211d;
}
:root[data-theme="light"] {
  --bg: #f6f4ef; --surface: #fffdf8; --surface-2: #efece4;
  --ink: #22201c; --ink-soft: #55514a; --ink-faint: #8a857c;
  --line: #e0dcd2; --line-strong: #cfc9bc;
  --accent: #7a5c3e; --accent-soft: #efe6d9; --link: #6b4f34;
  --grade-a: #3f6b4a; --grade-a-bg: #e4ede4;
  --grade-b: #5a6a3a; --grade-b-bg: #eaecdd;
  --grade-c: #8a6a2f; --grade-c-bg: #f0e7d3;
  --grade-d: #9a4436; --grade-d-bg: #f0dcd6;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* -------- Header / nav -------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header__inner {
  max-width: var(--maxw-wide);
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 20px;
}
.brand {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .01em;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}
.brand span { color: var(--accent); }
.nav {
  display: flex;
  gap: 4px;
  margin-left: auto;
  font-family: var(--sans);
  font-size: 14px;
  align-items: center;
}
.nav a {
  color: var(--ink-soft);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 7px;
  transition: background .15s, color .15s;
}
.nav a:hover { background: var(--surface-2); color: var(--ink); }
.nav a.is-active { color: var(--accent); font-weight: 600; }
.theme-toggle {
  font-family: var(--sans);
  font-size: 13px;
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--ink-soft);
  padding: 5px 10px;
  border-radius: 7px;
  cursor: pointer;
  margin-left: 4px;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }
.header-note {
  font-family: var(--sans);
  font-size: 12px;
  line-height: 1.4;
  text-align: center;
  color: var(--ink-faint);
  background: var(--surface-2);
  border-top: 1px solid var(--line);
  padding: 7px 24px;
}

/* -------- Layout -------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.wrap-wide { max-width: var(--maxw-wide); margin: 0 auto; padding: 0 24px; }

main { padding-bottom: 96px; }

/* -------- Hero -------- */
.hero { padding: 72px 0 40px; border-bottom: 1px solid var(--line); }
.eyebrow {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 18px;
}
h1 {
  font-size: clamp(2.1rem, 5vw, 3.2rem);
  line-height: 1.08;
  letter-spacing: -0.015em;
  margin: 0 0 20px;
  font-weight: 700;
}
.lede {
  font-size: 1.25rem;
  color: var(--ink-soft);
  line-height: 1.55;
  margin: 0 0 8px;
}
.meta {
  font-family: var(--sans);
  font-size: 13.5px;
  color: var(--ink-faint);
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}
.meta strong { color: var(--ink-soft); font-weight: 600; }

/* -------- Typography -------- */
h2 {
  font-size: 1.9rem;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 68px 0 8px;
  font-weight: 700;
  scroll-margin-top: 84px;
}
h2 + .section-sub { margin-top: 0; }
.section-sub {
  font-family: var(--sans);
  color: var(--ink-faint);
  font-size: 14px;
  margin: 0 0 28px;
}
h3 {
  font-size: 1.32rem;
  margin: 44px 0 10px;
  font-weight: 700;
  letter-spacing: -0.005em;
  scroll-margin-top: 84px;
}
h4 {
  font-family: var(--sans);
  font-size: 1.02rem;
  margin: 30px 0 8px;
  font-weight: 700;
}
p { margin: 0 0 20px; }
a { color: var(--link); text-decoration: underline; text-underline-offset: 2px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
strong { font-weight: 700; }
em { font-style: italic; }
ul, ol { margin: 0 0 22px; padding-left: 1.4em; }
li { margin-bottom: 8px; }
hr { border: none; border-top: 1px solid var(--line); margin: 48px 0; }

.section-number {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: .04em;
}

/* -------- Callouts -------- */
.callout {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 10px;
  padding: 22px 26px;
  margin: 32px 0;
  font-size: .98rem;
}
.callout h4 { margin-top: 0; }
.callout--tldr { border-left-color: var(--grade-d); background: var(--surface); }
.callout p:last-child, .callout ul:last-child { margin-bottom: 0; }

/* -------- Verdict box -------- */
.verdict {
  background: var(--accent-soft);
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  padding: 32px 34px;
  margin: 40px 0;
}
.verdict h3 { margin-top: 0; }

/* -------- Side-by-side quote comparison -------- */
.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 26px 0;
}
.compare__col {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px 20px;
}
.compare__label {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 10px;
}
.compare__col--w .compare__label { color: var(--grade-d); }
.compare__col--m .compare__label { color: var(--grade-a); }
.compare blockquote {
  margin: 0;
  font-size: .96rem;
  line-height: 1.5;
  color: var(--ink);
}
@media (max-width: 640px) { .compare { grid-template-columns: 1fr; } }

/* -------- Grade badge + question cards -------- */
.grade {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--sans);
  font-weight: 800;
  font-size: 13px;
  min-width: 30px;
  height: 24px;
  padding: 0 7px;
  border-radius: 6px;
  letter-spacing: 0;
  vertical-align: middle;
}
.grade--A { color: var(--grade-a); background: var(--grade-a-bg); }
.grade--B { color: var(--grade-b); background: var(--grade-b-bg); }
.grade--C { color: var(--grade-c); background: var(--grade-c-bg); }
.grade--D { color: var(--grade-d); background: var(--grade-d-bg); }

.qcard {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px 20px;
  margin: 0 0 12px;
}
.qcard__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 6px;
}
.qcard__id {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 13px;
  color: var(--ink-faint);
  white-space: nowrap;
}
.qcard__q { font-weight: 700; font-size: 1.02rem; flex: 1; }
.qcard__body { font-size: .95rem; color: var(--ink-soft); margin: 0; }

/* Grade filter bar */
.gradekey {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  font-family: var(--sans);
  font-size: 13.5px;
  color: var(--ink-soft);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px 20px;
  margin: 24px 0 32px;
}
.gradekey div { display: flex; align-items: center; gap: 8px; }

/* -------- Prompt block with copy -------- */
.prompt {
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  margin: 26px 0;
  overflow: hidden;
}
.prompt__bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--line);
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
}
.prompt__label { flex: 1; }
.copy-btn {
  font-family: var(--sans);
  font-size: 12.5px;
  font-weight: 600;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  color: var(--ink-soft);
  padding: 5px 12px;
  border-radius: 7px;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}
.copy-btn:hover { border-color: var(--accent); color: var(--accent); }
.copy-btn.copied { color: var(--grade-a); border-color: var(--grade-a); }
.prompt pre {
  margin: 0;
  padding: 18px 20px;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.62;
  white-space: pre-wrap;
  word-wrap: break-word;
  color: var(--ink);
  overflow-x: auto;
}

/* -------- Steps -------- */
.step {
  display: flex;
  gap: 20px;
  margin: 0 0 8px;
  padding: 26px 0;
  border-top: 1px solid var(--line);
}
.step__num {
  flex: none;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--sans);
  font-weight: 800;
  font-size: 17px;
  display: flex; align-items: center; justify-content: center;
}
.step__body { flex: 1; }
.step__body h3 { margin-top: 0; }
.step__body > *:last-child { margin-bottom: 0; }

/* why-box */
.why {
  font-family: var(--sans);
  font-size: .92rem;
  color: var(--ink-soft);
  background: var(--surface-2);
  border-radius: 9px;
  padding: 14px 18px;
  margin: 16px 0;
  line-height: 1.55;
}
.why strong { color: var(--ink); }

/* -------- Questionnaire tables -------- */
.qform { margin: 24px 0 40px; }
.qform__item {
  border-top: 1px solid var(--line);
  padding: 16px 0;
}
.qform__item:last-child { border-bottom: 1px solid var(--line); }
.qform__q {
  font-weight: 700;
  font-size: 1rem;
  margin: 0 0 4px;
}
.qform__q .qn { color: var(--accent); font-family: var(--sans); font-size: .85em; margin-right: 6px; }
.qform__tags {
  font-family: var(--sans);
  font-size: 11.5px;
  color: var(--ink-faint);
  margin: 0 0 10px;
  display: flex; gap: 10px; flex-wrap: wrap;
}
.qform__tags .req { color: var(--grade-d); font-weight: 600; }
.qform__opts {
  list-style: none;
  margin: 0; padding: 0;
  font-family: var(--sans);
  font-size: .9rem;
  color: var(--ink-soft);
}
.qform__opts li {
  padding: 3px 0 3px 22px;
  position: relative;
  margin: 0;
}
.qform__opts li::before {
  content: "";
  position: absolute; left: 2px; top: 9px;
  width: 11px; height: 11px;
  border: 1.5px solid var(--line-strong);
  border-radius: 50%;
}
.qform__opts.is-open li::before { display: none; }
.qform__opts.is-open li {
  padding-left: 0;
  font-style: italic;
  color: var(--ink-faint);
}

/* tabs for two forms */
.tabs {
  display: flex;
  gap: 6px;
  margin: 24px 0 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--sans);
}
/* main section tabs (Analysis / How to replicate) */
.tabs--main {
  position: sticky;
  top: var(--header-h, 84px);
  z-index: 15;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  gap: 4px;
  margin: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.tabs--main::-webkit-scrollbar { display: none; }
.tabs--main .tab-btn { white-space: nowrap; flex: none; }
.tabs--main .tab-btn {
  font-size: 15.5px;
  padding: 16px 22px;
  border-bottom-width: 3px;
}
.tabs--main .tab-btn.is-active { color: var(--ink); border-bottom-color: var(--accent); }
.tab-btn {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--ink-faint);
  font-size: 14px;
  font-weight: 600;
  padding: 10px 16px;
  cursor: pointer;
  margin-bottom: -1px;
}
.tab-btn.is-active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-panel { display: none; }
.tab-panel.is-active { display: block; }

/* -------- TOC (analysis page) -------- */
.toc {
  font-family: var(--sans);
  font-size: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 22px 26px;
  margin: 40px 0;
}
.toc h4 { margin: 0 0 12px; font-size: 12px; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-faint); }
.toc ol { margin: 0; padding-left: 1.3em; }
.toc li { margin-bottom: 6px; }
.toc a { color: var(--ink-soft); text-decoration: none; }
.toc a:hover { color: var(--accent); }

/* -------- Footer -------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 40px 0 60px;
  font-family: var(--sans);
  font-size: 13.5px;
  color: var(--ink-faint);
}
.site-footer a { color: var(--ink-soft); }
.site-footer p { margin: 0 0 8px; }

/* trigger note */
.disclaimer {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--ink-faint);
  background: var(--surface-2);
  border-radius: 9px;
  padding: 14px 18px;
  margin: 28px 0;
  line-height: 1.5;
}

/* -------- Side-by-side questionnaire -------- */
:root { --diff-bg: #f7e6bf; --diff-line: #d9b877; }
@media (prefers-color-scheme: dark) { :root { --diff-bg: #423619; --diff-line: #6b551f; } }
:root[data-theme="dark"] { --diff-bg: #423619; --diff-line: #6b551f; }
:root[data-theme="light"] { --diff-bg: #f7e6bf; --diff-line: #d9b877; }

mark.diff {
  background: var(--diff-bg);
  color: inherit;
  border-radius: 3px;
  padding: 0 2px;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}
.qpair__opts li.diff {
  background: var(--diff-bg);
  border-radius: 6px;
  padding-right: 8px;
  color: var(--ink);
}
.qpair__opts li.diff::before { border-color: var(--diff-line); }

.qcompare { margin: 22px 0 40px; }
.qcompare__head {
  position: sticky;
  top: calc(var(--header-h, 84px) + var(--tabs-h, 52px));
  z-index: 10;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  background: color-mix(in srgb, var(--bg) 93%, transparent);
  backdrop-filter: saturate(1.4) blur(8px);
  padding: 10px 0;
  border-bottom: 1.5px solid var(--line-strong);
}
.qcompare__head > div {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: .01em;
}
.qcompare__head .side-w { color: var(--grade-d); }
.qcompare__head .side-h { color: var(--grade-a); }
.qpair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  border-top: 1px solid var(--line);
  padding: 16px 0;
  align-items: start;
}
.qpair__q { font-weight: 700; font-size: .97rem; margin: 0 0 8px; line-height: 1.35; }
.qpair__q .qn {
  color: var(--accent);
  font-family: var(--sans);
  font-size: .78em;
  font-weight: 700;
  margin-right: 6px;
}
.qpair__opts { list-style: none; margin: 0; padding: 0; font-family: var(--sans); font-size: .85rem; color: var(--ink-soft); }
.qpair__opts li { padding: 2px 0 2px 20px; position: relative; margin: 0; }
.qpair__opts li::before {
  content: ""; position: absolute; left: 2px; top: 8px;
  width: 10px; height: 10px; border: 1.5px solid var(--line-strong); border-radius: 50%;
}
.qpair__note { font-family: var(--sans); font-size: .82rem; color: var(--ink-faint); font-style: italic; margin: 4px 0 0; }
.qpair__cell--empty {
  border: 1px dashed var(--line-strong);
  border-radius: 9px;
  color: var(--ink-faint);
  font-family: var(--sans);
  font-size: 12.5px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  padding: 12px;
  text-align: center;
}
@media (max-width: 720px) {
  .qcompare__head > div { font-size: 12.5px; }
  .qpair { grid-template-columns: 1fr 1fr; gap: 10px; }
  .qpair__q { font-size: .84rem; }
  .qpair__opts { font-size: .76rem; }
  .qpair__cell--empty { font-size: 11px; min-height: 40px; }
}

/* -------- Download card -------- */
.dl-card {
  background: var(--accent-soft);
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  padding: 24px 26px;
  margin: 28px 0 40px;
}
.dl-card h4 { margin: 0 0 6px; font-family: var(--sans); font-size: 1.05rem; }
.dl-card p { margin: 0 0 18px; font-family: var(--sans); font-size: .95rem; color: var(--ink-soft); }
.dl-row { display: flex; flex-wrap: wrap; gap: 10px; }
.dl-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  color: var(--ink);
  padding: 10px 16px;
  border-radius: 9px;
  cursor: pointer;
  transition: border-color .15s, color .15s, background .15s;
}
.dl-btn:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.dl-btn.copied { color: var(--grade-a); border-color: var(--grade-a); }
.dl-btn svg { width: 16px; height: 16px; flex: none; }
.dl-btn--primary { background: var(--accent); color: #fff; border-color: var(--accent); }
:root[data-theme="dark"] .dl-btn--primary { color: #1a1815; }
@media (prefers-color-scheme: dark) { .dl-btn--primary { color: #1a1815; } }
:root[data-theme="light"] .dl-btn--primary { color: #fff; }
.dl-btn--primary:hover { filter: brightness(1.06); color: #fff; }
:root[data-theme="dark"] .dl-btn--primary:hover { color: #1a1815; }

/* pill */
.pill {
  display: inline-block;
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 20px;
  background: var(--surface-2);
  color: var(--ink-soft);
  border: 1px solid var(--line);
}

@media (max-width: 560px) {
  body { font-size: 18px; }
  .hero { padding: 48px 0 32px; }
  .nav a { padding: 6px 8px; }
  .brand { font-size: 14px; }
}