/* ============================================================================
   EquitableDocs / Document Accessibility Checker
   Vanilla CSS, no preprocessor, no framework.
   Design tokens at :root. Editorial palette. System fonts only.
   WCAG 2.1 AA target for the site. Reduced-motion and forced-colors respected.
   ========================================================================= */

:root {
  /* Editorial palette, LOCKED. */
  --paper:        #f6f1e7;   /* cream */
  --paper-2:      #ece5d3;   /* slightly deeper cream for tinted sections */
  --paper-3:      #e3dcc7;   /* deeper still, for panels */
  --ink:          #1a1a1a;   /* body text on cream, ~16.5:1 contrast */
  --ink-soft:     #4a4a4a;   /* secondary text on cream, ~8.9:1 */
  --ink-faint:    #605b50;   /* meta text on cream, ~5.5:1 against paper, ~4.7:1 against paper-3, WCAG AA */
  --rule:         #c9bf9f;   /* paper-toned rule, decorative */
  --rule-strong:  #8a8270;   /* paper-toned rule, structural */
  --accent:       #8c2a14;   /* deep brick red, ~7.7:1 on cream */
  --accent-ink:   #f6f1e7;   /* cream on accent surfaces */
  --dark-bg:      #1a1a1a;
  --dark-fg:      #f6f1e7;
  --dark-faint:   #b8b1a3;
  --focus:        #5b3aa1;   /* high-contrast purple ring, distinguishable from accent */

  /* Type stacks. System fonts only, per standing rule. */
  --font-serif:   "Iowan Old Style", "Charter", "Bitstream Charter", "Sitka Text",
                  Cambria, Georgia, serif;
  --font-sans:    -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui,
                  Roboto, Helvetica, Arial, sans-serif;
  --font-mono:    ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  /* Scale. Step values, not arbitrary. */
  --t-xs:    0.8125rem;   /* 13px */
  --t-sm:    0.9375rem;   /* 15px */
  --t-base:  1.0625rem;   /* 17px body */
  --t-lg:    1.25rem;     /* 20px lede */
  --t-xl:    1.625rem;    /* 26px subhead */
  --t-2xl:   2.25rem;     /* 36px h2 */
  --t-3xl:   3.25rem;     /* 52px h1 */
  --t-4xl:   4.5rem;      /* 72px hero on wide viewports */

  --lh-tight:  1.12;
  --lh-snug:   1.3;
  --lh-body:   1.55;
  --lh-loose:  1.75;

  --measure:   38rem;      /* readable column for prose */
  --measure-w: 64rem;      /* wider column for headers and section eyebrows */

  --gutter:    clamp(1.25rem, 4vw, 2.5rem);

  --radius:    2px;        /* editorial, near-square */
}

/* --------------------------------------------------------- reset and base */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-serif);
  font-size: var(--t-base);
  line-height: var(--lh-body);
  color: var(--ink);
  background: var(--paper);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; height: auto; display: block; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 2rem 0; }

/* --------------------------------------------------------- skip link */
.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--paper);
  padding: 0.75rem 1rem; font-family: var(--font-sans); font-weight: 600;
  z-index: 1000;
}
.skip-link:focus { left: 1rem; top: 1rem; outline: 3px solid var(--focus); }

/* Visually hidden, available to screen readers. Standard pattern. */
.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;
}

/* --------------------------------------------------------- focus ring */
:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

/* --------------------------------------------------------- wraps */
.wrap {
  width: 100%;
  max-width: var(--measure-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.wrap.narrow { max-width: var(--measure-w); }

/* --------------------------------------------------------- header */
.site-header {
  border-bottom: 1px solid var(--rule);
  padding: 1.25rem 0;
  background: var(--paper);
}
.site-header .wrap {
  display: flex; align-items: center; gap: 1.5rem;
  flex-wrap: wrap;
}
.site-name {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.01em;
  color: var(--ink);
  text-decoration: none;
}
.site-nav {
  flex: 1;
}
.site-nav ul {
  list-style: none; padding: 0; margin: 0;
  display: flex; gap: 1.5rem; flex-wrap: wrap;
  font-family: var(--font-sans);
  font-size: var(--t-sm);
}
.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  padding: 0.25rem 0;
  border-bottom: 1px solid transparent;
}
.site-nav a:hover { color: var(--ink); border-bottom-color: var(--ink); }
.cta-pill {
  font-family: var(--font-sans);
  font-size: var(--t-sm);
  font-weight: 600;
  color: var(--accent-ink);
  background: var(--accent);
  padding: 0.55rem 1rem;
  text-decoration: none;
  border-radius: var(--radius);
}
.cta-pill:hover { background: var(--ink); }

/* ----------------------------------------- partner-with-us disclosure */
.nav-pw { position: relative; }
.nav-pw__btn {
  font-family: var(--font-sans);
  font-size: var(--t-sm);
  color: var(--ink-soft);
  background: none;
  border: 0;
  border-bottom: 1px solid transparent;
  padding: 0.25rem 0;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}
.nav-pw__btn:hover { color: var(--ink); border-bottom-color: var(--ink); }
.nav-pw__caret { font-size: 0.7em; line-height: 1; transition: transform 0.15s ease; }
.nav-pw__btn[aria-expanded="true"] .nav-pw__caret { transform: rotate(180deg); }
.nav-pw__menu {
  list-style: none;
  margin: 0;
  padding: 0.4rem 0;
  position: absolute;
  top: calc(100% + 0.4rem);
  left: 0;
  min-width: 12rem;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
  z-index: 20;
}
.nav-pw__menu[hidden] { display: none; }
.nav-pw__menu li { margin: 0; }
.nav-pw__menu a {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 0;
  white-space: nowrap;
}
.nav-pw__menu a:hover,
.nav-pw__menu a:focus-visible { background: var(--paper-2); color: var(--ink); }
.nav-pw__menu a[aria-current="page"] { color: var(--ink); font-weight: 600; }
/* No-JS fallback: show the three links inline as plain nav links. */
.nav-pw noscript { display: inline-flex; gap: 1.5rem; }
.nav-pw noscript a {
  color: var(--ink-soft);
  text-decoration: none;
  padding: 0.25rem 0;
  border-bottom: 1px solid transparent;
}
.nav-pw noscript a:hover { color: var(--ink); border-bottom-color: var(--ink); }

/* --------------------------------------------------------- hero */
.hero {
  padding: clamp(3rem, 8vw, 6rem) 0 clamp(2.5rem, 6vw, 4.5rem);
  border-bottom: 1px solid var(--rule);
}
.hero-headline {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(2.25rem, 5.5vw, var(--t-4xl));
  line-height: var(--lh-tight);
  letter-spacing: -0.015em;
  margin: 0.5rem 0 1.25rem;
  max-width: 22ch;
  text-wrap: balance;
}
.hero-lede {
  font-family: var(--font-serif);
  font-size: var(--t-lg);
  line-height: var(--lh-body);
  color: var(--ink-soft);
  margin: 0 0 1.75rem;
  max-width: var(--measure);
  text-wrap: pretty;
}
.hero-actions {
  display: flex; gap: 1rem; flex-wrap: wrap;
  margin-bottom: 2.5rem;
}
.hero-note {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: var(--lh-body);
  color: var(--ink-soft);
  margin: -1.25rem 0 2rem;
  max-width: var(--measure);
}
.hero-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 1.25rem 2rem;
  margin: 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  font-family: var(--font-sans);
  font-size: var(--t-sm);
}
.hero-meta div { margin: 0; }
.hero-meta dt {
  font-size: var(--t-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  margin-bottom: 0.25rem;
}
.hero-meta dd { margin: 0; color: var(--ink); }

/* --------------------------------------------------------- eyebrow */
.eyebrow, .section-eyebrow {
  font-family: var(--font-sans);
  font-size: var(--t-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
  margin: 0 0 1.25rem;
  display: flex; align-items: baseline; gap: 0.75rem;
}
.eyebrow-num, .section-eyebrow .num {
  font-family: var(--font-serif);
  font-style: italic;
  text-transform: none;
  letter-spacing: 0;
  color: var(--accent);
  font-size: var(--t-sm);
}

/* --------------------------------------------------------- buttons */
.btn-primary {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: var(--t-sm);
  font-weight: 600;
  color: var(--accent-ink);
  background: var(--accent);
  padding: 0.85rem 1.5rem;
  text-decoration: none;
  border: 0;
  border-radius: var(--radius);
  cursor: pointer;
}
.btn-primary:hover { background: var(--ink); }
.btn-primary.inverted { background: var(--paper); color: var(--ink); }
.btn-primary.inverted:hover { background: var(--accent); color: var(--accent-ink); }
.btn-link {
  font-family: var(--font-sans);
  font-size: var(--t-sm);
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  padding: 0.85rem 0.25rem;
  border-bottom: 2px solid var(--ink);
}
.btn-link:hover { color: var(--accent); border-bottom-color: var(--accent); }
.btn-secondary {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: var(--t-sm);
  font-weight: 600;
  color: var(--accent);
  background: transparent;
  padding: 0.7rem 1.35rem;
  text-decoration: none;
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  cursor: pointer;
}
.btn-secondary:hover { background: var(--accent); color: var(--accent-ink); }

/* --------------------------------------------------------- sections */
.section {
  padding: clamp(3rem, 7vw, 5.5rem) 0;
  border-bottom: 1px solid var(--rule);
}
.section-tinted { background: var(--paper-2); }
.section-paper  { background: var(--paper-3); }
.section-dark   { background: var(--dark-bg); color: var(--dark-fg); border-bottom: 0; }
.section-dark a { color: var(--dark-fg); }
.section-dark .section-eyebrow,
.section-dark .section-eyebrow .num { color: var(--dark-faint); }
.section-headline {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.75rem, 3.5vw, var(--t-2xl));
  line-height: var(--lh-snug);
  letter-spacing: -0.01em;
  margin: 0 0 1.25rem;
  max-width: 26ch;
  text-wrap: balance;
}
.section-headline.inverted { color: var(--dark-fg); }
.section-lede {
  font-family: var(--font-serif);
  font-size: var(--t-lg);
  line-height: var(--lh-body);
  color: var(--ink-soft);
  margin: 0 0 1.5rem;
  max-width: var(--measure);
  text-wrap: pretty;
}
.section-lede.inverted { color: var(--dark-faint); }
.section-after-cards {
  font-family: var(--font-serif);
  font-size: var(--t-lg);
  line-height: var(--lh-body);
  color: var(--ink-soft);
  margin: 2rem 0 0;
  max-width: var(--measure);
  text-wrap: pretty;
}

/* --------------------------------------------------------- prose */
.prose p {
  font-size: var(--t-base);
  line-height: var(--lh-loose);
  margin: 0 0 1.1rem;
  max-width: var(--measure);
  text-wrap: pretty;
}
.in-short {
  font-family: var(--font-sans);
  font-size: var(--t-sm);
  color: var(--ink-soft);
  border-left: 3px solid var(--accent);
  padding: 0.5rem 0 0.5rem 1rem;
  margin: 1.75rem 0 0;
  max-width: var(--measure);
}
.in-short.panel {
  border-left: 0;
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 0.75rem 1rem;
  margin: 0 0 2rem;
  max-width: 100%;
}
.in-short strong { color: var(--ink); font-weight: 600; }

/* --------------------------------------------------------- cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}
.card {
  border-top: 2px solid var(--ink);
  padding-top: 1.25rem;
}
.card-num {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--accent);
  margin: 0 0 0.5rem;
  font-size: var(--t-base);
}
.card-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: var(--t-xl);
  margin: 0 0 0.75rem;
  line-height: var(--lh-snug);
}
.card p {
  font-size: var(--t-sm);
  line-height: var(--lh-loose);
  color: var(--ink-soft);
  margin: 0;
}

/* --------------------------------------------------------- steps */
.steps {
  list-style: none;
  padding: 0;
  margin: 2rem 0 0;
  display: grid; gap: 2rem;
  counter-reset: step;
}
.steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem 1.5rem;
  align-items: start;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
}
.steps li h3 {
  font-family: var(--font-serif);
  font-size: var(--t-xl);
  margin: 0 0 0.5rem;
  font-weight: 600;
  line-height: var(--lh-snug);
}
.steps li p {
  font-size: var(--t-base);
  line-height: var(--lh-loose);
  margin: 0;
  color: var(--ink-soft);
}
.step-num {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--accent);
  font-size: var(--t-lg);
  grid-row: span 2;
}
.steps code {
  font-family: var(--font-mono);
  font-size: 0.95em;
  background: var(--paper);
  padding: 0.05em 0.4em;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

/* --------------------------------------------------------- scope panel */
.scope-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 2.5rem;
}
.scope-col h3 {
  font-family: var(--font-sans);
  font-size: var(--t-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink);
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--rule-strong);
}
.scope-col ul {
  list-style: none; padding: 0; margin: 0;
}
.scope-col li {
  font-family: var(--font-serif);
  font-size: var(--t-base);
  line-height: var(--lh-snug);
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--rule);
}
.scope-col li:last-child { border-bottom: 0; }

/* --------------------------------------------------------- standards list */
.standards-list {
  list-style: none;
  padding: 0;
  margin: 2rem 0 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 2rem;
}
.standards-list li {
  border-top: 2px solid var(--ink);
  padding-top: 1.25rem;
}
.standards-list h3 {
  font-family: var(--font-serif);
  font-size: var(--t-xl);
  margin: 0.5rem 0 0.5rem;
  line-height: var(--lh-snug);
  font-weight: 600;
}
.standards-list p {
  font-size: var(--t-sm);
  line-height: var(--lh-loose);
  margin: 0;
  color: var(--ink-soft);
}
.std-num {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--accent);
  font-size: var(--t-base);
  margin: 0;
}

/* --------------------------------------------------------- FAQ */
.faq {
  margin: 2rem 0 0;
  display: grid;
  gap: 1.25rem;
}
.faq dt {
  font-family: var(--font-serif);
  font-size: var(--t-xl);
  font-weight: 600;
  line-height: var(--lh-snug);
  margin: 1rem 0 0.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
}
.faq dd {
  margin: 0;
  font-size: var(--t-base);
  line-height: var(--lh-loose);
  color: var(--ink-soft);
}
.faq dd p { margin: 0 0 0.75rem; }
.faq dd ol, .faq dd ul {
  margin: 0 0 0.75rem 1.25rem;
  padding: 0;
}
.faq dd li { margin-bottom: 0.5rem; }

/* --------------------------------------------------------- signup form */
.signup {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1rem 1.5rem;
  margin-top: 2rem;
}
.signup .field { display: grid; gap: 0.4rem; }
.signup .field.full { grid-column: 1 / -1; }
.signup label {
  font-family: var(--font-sans);
  font-size: var(--t-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--dark-faint);
}
.signup input,
.signup select,
.signup textarea {
  font-family: var(--font-serif);
  font-size: var(--t-base);
  background: transparent;
  color: var(--dark-fg);
  border: 0;
  border-bottom: 1px solid var(--dark-faint);
  padding: 0.6rem 0;
}
.signup input:focus,
.signup select:focus,
.signup textarea:focus {
  outline: 0;
  border-bottom-color: var(--paper);
}
.signup .actions {
  grid-column: 1 / -1;
  margin-top: 1rem;
}
.signup select option { background: var(--dark-bg); color: var(--dark-fg); }

/* --------------------------------------------------------- footer */
.site-footer {
  background: var(--paper-3);
  padding: 3rem 0 2rem;
  border-top: 1px solid var(--rule);
}
.site-footer .wrap {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem 2rem;
  align-items: start;
}
.footer-brand {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: var(--t-lg);
  margin: 0;
}
.site-footer nav ul {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-wrap: wrap; gap: 1.25rem;
  font-family: var(--font-sans);
  font-size: var(--t-sm);
}
.site-footer nav a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding: 0.5rem 0;
  display: inline-block;
  min-height: 1.5rem;
}
.site-footer nav a:hover { color: var(--ink); border-bottom-color: var(--ink); }
.footer-contact {
  font-family: var(--font-sans);
  font-size: var(--t-sm);
  font-style: normal;
  color: var(--ink-soft);
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  align-items: center;
}
.footer-contact__label {
  font-weight: 600;
  color: var(--ink);
}
.footer-contact a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.footer-contact a:hover { color: var(--ink); }
.footer-note {
  grid-column: 1 / -1;
  font-family: var(--font-sans);
  font-size: var(--t-xs);
  color: var(--ink-faint);
  margin: 1.5rem 0 0;
  max-width: 50rem;
}

/* "For students, faculty, library staff" card. Slim band between hero and §01. */
.for-students {
  background: var(--paper-2);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 2.25rem 0;
}
.for-students .wrap {
  max-width: var(--measure-w);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem 2rem;
  align-items: center;
}
.for-students__eyebrow {
  font-family: var(--font-sans);
  font-size: var(--t-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 0.4rem;
  grid-column: 1;
}
.for-students__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: var(--t-xl);
  line-height: var(--lh-snug);
  color: var(--ink);
  margin: 0 0 0.5rem;
  grid-column: 1;
}
.for-students__body {
  font-family: var(--font-sans);
  font-size: var(--t-sm);
  line-height: var(--lh-body);
  color: var(--ink-soft);
  margin: 0;
  grid-column: 1;
  max-width: var(--measure);
}
.for-students__cta {
  grid-column: 2;
  grid-row: 1 / span 3;
  align-self: center;
  margin: 0;
}
@media (max-width: 48rem) {
  .for-students .wrap { grid-template-columns: 1fr; }
  .for-students__cta { grid-column: 1; grid-row: auto; margin-top: 0.75rem; }
}

/* Community of Practice block. Dominant footer element, leads above brand and links. */
.footer-cop {
  grid-column: 1 / -1;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--accent);
  padding: 1.75rem 1.75rem 1.5rem;
  margin: 0 0 1.5rem;
}
.footer-cop__eyebrow {
  font-family: var(--font-sans);
  font-size: var(--t-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 0.5rem;
}
.footer-cop__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: var(--t-xl);
  line-height: var(--lh-snug);
  color: var(--ink);
  margin: 0 0 0.75rem;
}
.footer-cop__body {
  font-family: var(--font-sans);
  font-size: var(--t-sm);
  line-height: var(--lh-body);
  color: var(--ink-soft);
  margin: 0 0 1rem;
  max-width: 50rem;
}
.footer-cop__cta {
  margin: 0;
}

/* --------------------------------------------------------- responsive */
@media (max-width: 48rem) {
  .site-header .wrap { gap: 0.75rem 1rem; }
  .site-nav { order: 3; flex-basis: 100%; }
  .cta-pill { margin-left: auto; }
  .hero-meta { grid-template-columns: 1fr; }
}

/* --------------------------------------------------------- reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* --------------------------------------------------------- forced colors */
@media (forced-colors: active) {
  .btn-primary, .btn-secondary, .cta-pill {
    forced-color-adjust: none;
    background: ButtonFace;
    color: ButtonText;
    border: 1px solid ButtonText;
  }
  .card, .standards-list li { border-top-color: CanvasText; }
  .in-short { border-left-color: CanvasText; }
}