/* =============================================================================
   RequestALab — assets/styles.css
   Hand-authored, framework-free visual system for requestalab.com

   DESIGN LANGUAGE
   ---------------
   Calm, editorial, credible medical directory. Warm bone paper, deep pine ink,
   coral for action, amber for accents. FLAT and border-forward: cards and
   panels are defined by 1px borders — never shadows. Typography is the hero:
   Sora (headings) + Public Sans (body), both loaded by the head template via
   Google Fonts. This file contains no CSS imports and performs no fetches.

   DESIGN TOKENS (exact contract)
   ------------------------------
   --ink:#12211C            primary text
   --ink-soft:#3D4F48       secondary text
   --pine:#0F5C4C           brand green (eyebrows, links, focus rules)
   --pine-700:#0B4638       dark pine (topbar, footer, banner CTA)
   --pine-100:#E4F0EA       pine tint (chips, hover fills, key points)
   --coral:#E0603C          accent (rules, card hover accent, focus ring)
   --coral-600:#C74E2C      accessible coral for solid buttons w/ white text
   --amber:#F2A73B          warm accent (footer column titles, price chip)
   --bone:#F6F3EC           page background
   --paper:#FFFFFF          surface background
   --line:#DAD5CA           1px borders
   --line-strong:#C3BCAC    hover borders, separators on bone
   --radius:8px             default corner
   --radius-sm:4px          small corner (chips, letters)
   --maxw:1200px            layout container
   --maxw-prose:760px       prose measure (used as min(760px, 68ch))

   CLASS CONTRACT (every class emitted by src/templates.js)
   --------------------------------------------------------
   Chrome:      skip-link, topbar(+__inner,__item,--right), site-header(+__inner),
                brand(+__mark,__text,__name,__tag), nav(+__list,__item,__link,
                .is-active,__toggle), breadcrumbs(+__list,__item,__link,
                __current,__sep), site-footer(+__grid,__col,--brand,__brand,
                __blurb,__title,__list,__link,__bottom,__legal)
   Buttons:     btn, btn--primary, btn--ghost, btn--sm, btn--lg, btn--block
   Layout:      main, section(+--prose,--faq,--citations,__head,__title,
                __lead,__more), grid(+--2,--3,--4), hero(+--home,__inner,
                __eyebrow,__title,__lead,__actions,__stats), stat(+__num,
                __label), search, search__input, page-head(+--404,__title,
                __lead), test-hero(+__title,__lead), test-facts, fact(+__label,
                __value), article(+__head,__title,__lead,__meta), keypoints
                (+__title,__list), citations, toc(+__list,__link),
                letter-group, test-index-wrap, test-index__summary,
                test-index(+--city), cta(+--inline,--banner,__inner,__title,
                __text,__actions,__note)
   Content:     eyebrow, steps, step(+__num,__title,__text), card(+--test,
                --state,--city,--guide,__accent,__title,__meta,__body,__link),
                chip(+--time,--price), prose, faq(+__item,__q,__a),
                visually-hidden
   ========================================================================== */

/* ---------------------------------------------------------------------------
   1. TOKENS
   --------------------------------------------------------------------------- */
:root {
  /* Palette — exact contract */
  --ink: #12211C;
  --ink-soft: #3D4F48;
  --pine: #0F5C4C;
  --pine-700: #0B4638;
  --pine-100: #E4F0EA;
  --coral: #E0603C;
  --coral-600: #C74E2C;
  --amber: #F2A73B;
  --bone: #F6F3EC;
  --paper: #FFFFFF;
  --line: #DAD5CA;
  --line-strong: #C3BCAC;
  --radius: 8px;
  --radius-sm: 4px;
  --maxw: 1200px;
  --maxw-prose: 760px;

  /* Spacing scale (4px base) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;
  --gutter: clamp(1rem, 3.5vw, 2rem);

  /* Type families */
  --font-head: "Sora", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: "Public Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;

  /* Fluid type scale */
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1.0625rem;
  --fs-lg: clamp(1.0625rem, 1rem + 0.3vw, 1.1875rem);
  --fs-h3: clamp(1.2rem, 1.08rem + 0.55vw, 1.45rem);
  --fs-h2: clamp(1.55rem, 1.25rem + 1.3vw, 2.15rem);
  --fs-h1: clamp(2.1rem, 1.45rem + 2.9vw, 3.15rem);
  --fs-hero: clamp(2.5rem, 1.55rem + 4.6vw, 4.4rem);

  /* Line heights */
  --lh-tight: 1.1;
  --lh-heading: 1.18;
  --lh-body: 1.62;

  /* Motion */
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --dur: 0.18s;

  /* Composite tints (alpha helpers) */
  --pine-15: rgba(15, 92, 76, 0.15);
  --pine-25: rgba(15, 92, 76, 0.25);
  --coral-35: rgba(224, 96, 60, 0.35);
  --ink-05: rgba(18, 33, 28, 0.05);
  --ink-28: rgba(18, 33, 28, 0.028);
  --bone-66: rgba(246, 243, 236, 0.66);
  --bone-78: rgba(246, 243, 236, 0.78);
  --bone-85: rgba(246, 243, 236, 0.85);
  --bone-55: rgba(246, 243, 236, 0.55);
  --bone-18: rgba(246, 243, 236, 0.18);
}

/* ---------------------------------------------------------------------------
   2. RESET / BASE
   --------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bone);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  font-weight: 400;
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-head);
  font-weight: 600;
  line-height: var(--lh-heading);
  letter-spacing: -0.015em;
}

h1 {
  font-size: var(--fs-h1);
}

h2 {
  font-size: var(--fs-h2);
}

h3 {
  font-size: var(--fs-h3);
}

p {
  margin: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
}

img,
picture,
video,
canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

svg {
  display: block;
}

a {
  color: inherit;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
}

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: var(--space-6) 0;
}

::selection {
  background: var(--pine-100);
  color: var(--pine-700);
}

/* ---------------------------------------------------------------------------
   3. ACCESSIBILITY PRIMITIVES
   --------------------------------------------------------------------------- */
:focus-visible {
  outline: 3px solid var(--coral);
  outline-offset: 2px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0 0 0 0) !important;
  clip-path: inset(50%) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.skip-link {
  position: absolute;
  top: -4rem;
  left: var(--space-4);
  z-index: 200;
  padding: 0.65rem 1rem;
  background: var(--pine-700);
  color: var(--bone);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: top var(--dur) var(--ease);
}

.skip-link:focus {
  top: var(--space-4);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .card:hover {
    transform: none;
  }

  .skip-link {
    transition: none;
  }
}

/* ---------------------------------------------------------------------------
   4. CONTAINERS
   --------------------------------------------------------------------------- */
.topbar__inner,
.site-header__inner,
.breadcrumbs,
.main > section:not(.hero),
.cta,
.footer__grid,
.footer__bottom {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.main {
  display: block;
  min-height: 50vh;
}

/* ---------------------------------------------------------------------------
   5. TOPBAR
   --------------------------------------------------------------------------- */
.topbar {
  background: var(--pine-700);
  color: var(--bone);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
}

.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: 0.5rem;
}

.topbar__item {
  color: var(--bone-85);
}

.topbar__item--right {
  margin-left: auto;
  text-align: right;
}

@media (max-width: 600px) {
  .topbar__item--right {
    display: none;
  }
}

/* ---------------------------------------------------------------------------
   6. SITE HEADER / BRAND / NAV
   --------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.site-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding-block: 0.8rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--ink);
}

.brand__mark {
  display: grid;
  place-items: center;
  flex: none;
  line-height: 0;
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.brand__name {
  font-family: var(--font-head);
  font-size: 1.12rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--ink);
}

.brand__tag {
  font-size: 0.72rem;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  margin-left: auto;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}

.nav__item {
  display: inline-flex;
}

.nav__link {
  display: inline-block;
  padding: 0.5rem 0.65rem;
  color: var(--ink-soft);
  font-size: 0.93rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.nav__link:hover {
  color: var(--pine);
  background: var(--pine-100);
}

.nav__link.is-active {
  color: var(--pine-700);
  font-weight: 600;
  box-shadow: inset 0 -2px 0 var(--coral);
}

.nav__toggle {
  display: none;
  margin-left: auto;
  padding: 0.5rem 0.95rem;
  background: var(--paper);
  color: var(--pine);
  border: 1.5px solid var(--pine);
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 600;
}

.nav__toggle:hover {
  background: var(--pine-100);
}

@media (max-width: 920px) {
  .nav__toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-4);
    margin: 0;
    padding: var(--space-3) var(--gutter) var(--space-5);
    background: var(--paper);
    border-bottom: 1px solid var(--line);
  }

  .nav__toggle[aria-expanded="true"] ~ .nav {
    display: flex;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav__item {
    display: block;
  }

  .nav__link {
    display: block;
    padding: 0.7rem 0.5rem;
    border-bottom: 1px solid var(--line);
  }

  .nav__link.is-active {
    box-shadow: none;
    color: var(--pine-700);
  }

  .nav .btn {
    width: 100%;
  }
}

@media (max-width: 560px) {
  .brand__tag {
    display: none;
  }
}

/* ---------------------------------------------------------------------------
   7. BUTTONS
   --------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.72rem 1.3rem;
  border: 1.5px solid transparent;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    color var(--dur) var(--ease),
    transform var(--dur) var(--ease),
    filter var(--dur) var(--ease);
}

/* Solid coral (coral-600 keeps white text at AA contrast) */
.btn--primary {
  background: var(--coral-600);
  border-color: var(--coral-600);
  color: #ffffff;
}

.btn--primary:hover {
  background: var(--coral);
  border-color: var(--coral);
  filter: brightness(0.92);
}

.btn--primary:active {
  transform: translateY(1px);
}

/* Outlined pine */
.btn--ghost {
  background: transparent;
  border-color: var(--pine);
  color: var(--pine);
}

.btn--ghost:hover {
  background: var(--pine-100);
  color: var(--pine-700);
}

.btn--ghost:active {
  transform: translateY(1px);
}

.btn--sm {
  padding: 0.5rem 0.95rem;
  font-size: 0.85rem;
}

.btn--lg {
  padding: 0.9rem 1.6rem;
  font-size: 1.02rem;
}

.btn--block {
  width: 100%;
}

/* ---------------------------------------------------------------------------
   8. BREADCRUMBS
   --------------------------------------------------------------------------- */
.breadcrumbs {
  padding-block: var(--space-3);
  font-size: 0.83rem;
}

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.45rem;
  list-style: none;
}

.breadcrumbs__item {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--ink-soft);
}

.breadcrumbs__link {
  color: var(--ink-soft);
  text-decoration: none;
}

.breadcrumbs__link:hover {
  color: var(--pine);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.breadcrumbs__current {
  color: var(--ink);
  font-weight: 600;
}

.breadcrumbs__sep {
  color: var(--line-strong);
  user-select: none;
}

/* ---------------------------------------------------------------------------
   9. HERO / STATS / SEARCH
   --------------------------------------------------------------------------- */
.hero {
  position: relative;
  padding-block: clamp(3.5rem, 8vw, 6.5rem);
}

.hero--home {
  background-color: var(--bone);
  background-image:
    radial-gradient(58rem 30rem at 88% -12%, var(--coral-35), transparent 62%),
    radial-gradient(52rem 30rem at 4% -4%, var(--pine-15), transparent 66%),
    repeating-linear-gradient(0deg, var(--ink-28) 0 1px, transparent 1px 34px),
    repeating-linear-gradient(90deg, var(--ink-28) 0 1px, transparent 1px 34px);
  background-repeat: no-repeat, no-repeat, repeat, repeat;
  border-bottom: 1px solid var(--line);
}

.hero__inner {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.eyebrow,
.hero__eyebrow {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 var(--space-3);
  color: var(--pine);
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow::before,
.hero__eyebrow::before {
  content: "";
  flex: none;
  width: 28px;
  height: 2px;
  background: var(--coral);
}

.hero__title {
  max-width: 13ch;
  margin: var(--space-4) 0 var(--space-5);
  font-family: var(--font-head);
  font-size: var(--fs-hero);
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

.hero__lead {
  max-width: 52ch;
  color: var(--ink-soft);
  font-size: var(--fs-lg);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5) var(--space-7);
  margin-top: var(--space-7);
  padding-top: var(--space-5);
  border-top: 1px solid var(--line-strong);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.stat__num {
  font-family: var(--font-head);
  font-size: clamp(1.7rem, 1.4rem + 1vw, 2.2rem);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--pine-700);
  font-variant-numeric: tabular-nums;
}

.stat__label {
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.search {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  max-width: 660px;
  margin-top: var(--space-5);
}

.search__input {
  flex: 1 1 260px;
  min-width: 0;
  padding: 0.78rem 1.15rem;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.3;
}

.search__input::placeholder {
  color: var(--ink-soft);
  opacity: 0.72;
}

.search__input:focus {
  border-color: var(--pine);
}

.search .btn {
  flex: 0 0 auto;
}

@media (max-width: 480px) {
  .search .btn {
    width: 100%;
  }
}

/* ---------------------------------------------------------------------------
   10. SECTIONS / GRID / STEPS
   --------------------------------------------------------------------------- */
.section {
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
}

.section__head {
  max-width: 62ch;
  margin-bottom: var(--space-6);
}

.section__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: var(--fs-h2);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.section__lead {
  margin-top: var(--space-3);
  max-width: 62ch;
  color: var(--ink-soft);
  font-size: 1.03rem;
}

.section__lead a {
  color: var(--pine);
}

.section__more {
  margin-top: var(--space-6);
}

.section--prose {
  padding-block: clamp(2rem, 5vw, 3.5rem);
}

.section--faq {
  padding-block: clamp(2.5rem, 6vw, 4rem);
}

.section--citations {
  padding-block: var(--space-6) 0;
}

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 560px) {
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .grid--3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .grid--4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  list-style: none;
}

@media (min-width: 780px) {
  .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.step {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: var(--space-5);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.1rem;
  height: 2.1rem;
  margin-bottom: var(--space-4);
  background: var(--pine);
  color: var(--paper);
  border-radius: 999px;
  font-family: var(--font-head);
  font-size: 0.95rem;
  font-weight: 600;
}

.step__title {
  margin: 0 0 var(--space-2);
  font-size: 1.08rem;
}

.step__text {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

/* ---------------------------------------------------------------------------
   11. CARDS / CHIPS
   --------------------------------------------------------------------------- */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  height: 100%;
  padding: calc(var(--space-5) + 3px) var(--space-5) var(--space-5);
  overflow: hidden;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.card:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.card__accent {
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--line);
  transition: background-color var(--dur) var(--ease);
}

.card:hover .card__accent {
  background: var(--coral);
}

.card__title {
  display: block;
  font-family: var(--font-head);
  font-size: 1.06rem;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.card__body {
  display: block;
  color: var(--ink-soft);
  font-size: 0.92rem;
  line-height: 1.55;
}

.card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  margin-top: auto;
  padding-top: var(--space-2);
  color: var(--pine);
  font-size: 0.9rem;
  font-weight: 600;
}

.card:hover .card__link {
  color: var(--coral-600);
}

.card--test .card__body {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  overflow: hidden;
}

.card--state .card__title,
.card--city .card__title {
  font-size: 1.02rem;
}

.card--guide .eyebrow {
  margin-bottom: 0;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.26rem 0.55rem;
  background: var(--bone);
  color: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
}

.chip--time {
  background: var(--pine-100);
  color: var(--pine-700);
  border-color: var(--pine-25);
}

.chip--price {
  background: rgba(242, 167, 59, 0.18);
  color: var(--ink);
  border-color: rgba(242, 167, 59, 0.5);
}

/* ---------------------------------------------------------------------------
   12. CTA BLOCKS
   --------------------------------------------------------------------------- */
.cta {
  padding-block: clamp(2rem, 4.5vw, 3.25rem);
}

.cta__inner {
  padding: clamp(1.5rem, 4vw, 3rem);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.cta--inline .cta__inner {
  border-left: 4px solid var(--coral);
}

.cta--banner .cta__inner {
  position: relative;
  overflow: hidden;
  background: var(--pine-700);
  color: var(--bone);
  border-color: var(--pine-700);
}

.cta--banner .cta__inner::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--coral);
}

.cta__title {
  max-width: 34ch;
  font-family: var(--font-head);
  font-size: clamp(1.35rem, 1.15rem + 0.9vw, 1.9rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.cta__text {
  max-width: 58ch;
  margin-top: var(--space-3);
  color: var(--ink-soft);
}

.cta--banner .cta__text {
  color: var(--bone-78);
}

.cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.cta--banner .btn--ghost {
  color: var(--bone);
  border-color: var(--bone-55);
}

.cta--banner .btn--ghost:hover {
  background: var(--bone-18);
  color: var(--paper);
}

.cta__note {
  max-width: 68ch;
  margin-top: var(--space-4);
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--ink-soft);
}

.cta--banner .cta__note {
  color: var(--bone-66);
}

/* ---------------------------------------------------------------------------
   13. PAGE HEAD / TEST HERO / FACTS
   --------------------------------------------------------------------------- */
.page-head {
  padding-block: clamp(2.5rem, 5.5vw, 4rem) clamp(1rem, 2.5vw, 1.75rem);
}

.page-head__title {
  max-width: 24ch;
  margin-top: var(--space-4);
  font-size: var(--fs-h1);
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.page-head__lead {
  max-width: 62ch;
  margin-top: var(--space-4);
  color: var(--ink-soft);
  font-size: var(--fs-lg);
}

.page-head--404 {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 52vh;
  text-align: left;
}

.test-hero {
  padding-block: clamp(2.5rem, 6vw, 4.5rem) clamp(1.5rem, 3vw, 2.25rem);
}

.test-hero__title {
  max-width: 26ch;
  margin-top: var(--space-4);
  font-size: var(--fs-h1);
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.test-hero__lead {
  max-width: 62ch;
  margin-top: var(--space-4);
  color: var(--ink-soft);
  font-size: var(--fs-lg);
}

.test-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px;
  margin-top: var(--space-6);
  overflow: hidden;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.fact {
  padding: var(--space-4) var(--space-4) var(--space-4) var(--space-5);
  background: var(--paper);
}

.fact__label {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--ink-soft);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.fact__value {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
}

/* ---------------------------------------------------------------------------
   14. PROSE
   --------------------------------------------------------------------------- */
.prose {
  max-width: min(var(--maxw-prose), 68ch);
  color: var(--ink);
  font-size: var(--fs-base);
  line-height: 1.72;
}

.prose > :first-child {
  margin-top: 0;
}

.prose > * + * {
  margin-top: var(--space-4);
}

.prose h2 {
  margin-top: var(--space-7);
  padding-top: var(--space-4);
  border-top: 1px solid var(--line);
  font-family: var(--font-head);
  font-size: clamp(1.35rem, 1.2rem + 0.6vw, 1.6rem);
  font-weight: 600;
  letter-spacing: -0.015em;
}

.prose h3 {
  margin-top: var(--space-6);
  font-family: var(--font-head);
  font-size: 1.15rem;
  font-weight: 600;
}

.prose h4 {
  margin-top: var(--space-5);
  font-family: var(--font-head);
  font-size: 1.02rem;
  font-weight: 600;
}

.prose p {
  margin: 0;
}

.prose ul,
.prose ol {
  padding-left: 1.3rem;
}

.prose li + li {
  margin-top: 0.45rem;
}

.prose li > ul,
.prose li > ol {
  margin-top: 0.45rem;
}

.prose strong {
  color: var(--pine-700);
  font-weight: 600;
}

.prose a {
  color: var(--pine);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.prose a:hover {
  color: var(--coral-600);
  text-decoration-thickness: 2px;
}

.prose blockquote {
  margin: var(--space-5) 0;
  padding: var(--space-2) 0 var(--space-2) var(--space-5);
  border-left: 3px solid var(--coral);
  color: var(--ink-soft);
  font-style: italic;
}

.prose code {
  padding: 0.1rem 0.35rem;
  background: var(--pine-100);
  border-radius: var(--radius-sm);
  font-size: 0.92em;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.prose th,
.prose td {
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.prose th {
  background: var(--pine-100);
  font-family: var(--font-head);
  font-weight: 600;
}

.prose hr {
  margin: var(--space-6) 0;
}

/* ---------------------------------------------------------------------------
   15. FAQ
   --------------------------------------------------------------------------- */
.faq {
  max-width: min(var(--maxw-prose), 68ch);
  border-top: 1px solid var(--line);
}

.faq__item {
  border-bottom: 1px solid var(--line);
}

.faq__q {
  position: relative;
  padding: var(--space-4) 2.25rem var(--space-4) 0;
  color: var(--ink);
  font-family: var(--font-head);
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.35;
  cursor: pointer;
  list-style: none;
}

.faq__q::-webkit-details-marker {
  display: none;
}

.faq__q::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 0.15rem;
  transform: translateY(-50%);
  color: var(--coral);
  font-family: var(--font-head);
  font-size: 1.35rem;
  font-weight: 500;
  line-height: 1;
}

.faq__item[open] .faq__q::after {
  content: "\2212";
}

.faq__a {
  max-width: 64ch;
  padding: 0 0 var(--space-5);
  color: var(--ink-soft);
}

.faq__a > * + * {
  margin-top: var(--space-3);
}

/* ---------------------------------------------------------------------------
   16. KEY POINTS / ARTICLE / CITATIONS / TOC
   --------------------------------------------------------------------------- */
.keypoints {
  max-width: min(var(--maxw-prose), 68ch);
  margin: var(--space-6) 0;
  padding: var(--space-5);
  background: var(--pine-100);
  border: 1px solid var(--pine-25);
  border-left: 4px solid var(--pine);
  border-radius: var(--radius);
}

.keypoints__title {
  font-size: 1rem;
  letter-spacing: 0.02em;
}

.keypoints__list {
  margin-top: var(--space-3);
  padding-left: 1.15rem;
}

.keypoints__list li + li {
  margin-top: 0.45rem;
}

.article {
  width: 100%;
  max-width: var(--maxw-prose);
  margin-inline: auto;
  padding: clamp(2.5rem, 5vw, 4rem) var(--gutter) clamp(1rem, 2vw, 1.5rem);
}

.article__head {
  padding-bottom: var(--space-5);
  margin-bottom: var(--space-6);
  border-bottom: 1px solid var(--line);
}

.article__title {
  margin-top: var(--space-4);
  font-size: var(--fs-h1);
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.article__lead {
  max-width: 62ch;
  margin-top: var(--space-4);
  color: var(--ink-soft);
  font-size: 1.12rem;
}

.article__meta {
  margin-top: var(--space-4);
  color: var(--ink-soft);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
}

.citations {
  max-width: min(var(--maxw-prose), 68ch);
  margin-top: var(--space-4);
  padding-left: 1.25rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.citations li + li {
  margin-top: 0.45rem;
}

.citations a {
  color: var(--pine);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.citations a:hover {
  color: var(--coral-600);
}

.toc {
  display: inline-block;
  max-width: 100%;
  margin: var(--space-5) 0 var(--space-6);
  padding: var(--space-3) var(--space-4);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.toc__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 0.3rem;
  list-style: none;
}

.toc__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2rem;
  padding: 0.3rem 0.45rem;
  color: var(--pine);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
}

.toc__link:hover {
  background: var(--pine-100);
  color: var(--pine-700);
}

.letter-group {
  scroll-margin-top: 96px;
}

.letter-group + .letter-group {
  margin-top: var(--space-7);
}

/* ---------------------------------------------------------------------------
   17. TEST INDEX (collapsible multi-column link directory)
   --------------------------------------------------------------------------- */
.test-index-wrap {
  margin-top: var(--space-6);
  border-top: 3px solid var(--pine);
}

.test-index__summary {
  position: relative;
  padding: var(--space-4) 2.25rem var(--space-4) 0;
  color: var(--ink);
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

.test-index__summary::-webkit-details-marker {
  display: none;
}

.test-index__summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 0.25rem;
  transform: translateY(-50%);
  color: var(--coral);
  font-family: var(--font-head);
  font-size: 1.35rem;
  line-height: 1;
}

.test-index-wrap[open] .test-index__summary::after {
  content: "\2212";
}

.test-index {
  column-count: 1;
  column-gap: var(--space-6);
  margin: 0 0 var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--line);
  list-style: none;
}

.test-index li {
  break-inside: avoid;
  margin-bottom: 0.3rem;
}

.test-index a {
  color: var(--pine-700);
  font-size: 0.9rem;
  line-height: 1.45;
  text-decoration: none;
}

.test-index a:hover {
  color: var(--coral-600);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (min-width: 640px) {
  .test-index {
    column-count: 2;
  }
}

@media (min-width: 980px) {
  .test-index {
    column-count: 3;
  }

  .test-index--city {
    column-count: 4;
  }
}

/* ---------------------------------------------------------------------------
   18. FOOTER
   --------------------------------------------------------------------------- */
.site-footer {
  margin-top: clamp(3rem, 7vw, 5.5rem);
  background: var(--pine-700);
  color: var(--bone);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  padding-block: clamp(2.5rem, 5.5vw, 4rem);
}

.footer__col {
  min-width: 0;
}

.footer__col--brand {
  max-width: 36rem;
}

.footer__brand {
  display: block;
  margin-bottom: var(--space-3);
  font-family: var(--font-head);
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--bone);
}

.footer__blurb {
  max-width: 44ch;
  color: var(--bone-78);
  font-size: 0.88rem;
  line-height: 1.6;
}

.footer__blurb + .footer__blurb {
  margin-top: var(--space-3);
}

.footer__title {
  margin-bottom: var(--space-3);
  color: var(--amber);
  font-family: var(--font-head);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.footer__list {
  list-style: none;
}

.footer__list li + li {
  margin-top: 0.55rem;
}

.footer__link {
  color: var(--bone-85);
  font-size: 0.9rem;
  text-decoration: none;
}

.footer__link:hover {
  color: var(--paper);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer__bottom {
  display: grid;
  gap: var(--space-2);
  padding-block: var(--space-5);
  border-top: 1px solid var(--bone-18);
}

.footer__legal {
  max-width: 95ch;
  color: var(--bone-66);
  font-size: 0.75rem;
  line-height: 1.55;
}

@media (min-width: 640px) {
  .footer__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

/* =============================================================================
   END OF FILE — RequestALab styles.css
   Class contract above matches src/templates.js exactly. No frameworks, no
   preprocessor syntax, no CSS imports, no external assets other than the Sora and
   Public Sans webfonts loaded by the HTML head. Icons are inline SVG in the
   templates; all decoration is border- and gradient-based.
   ========================================================================== */