/* =============================================================================
   GENERAL INFORMATION — Reading Room design system
   -----------------------------------------------------------------------------
   Bone paper, navy ink, one cinnabar hairline rule at every seam.
   Newsreader for display + long-form prose, Inter Tight for chrome and UI.
   Rules do the work that shadows and rounded cards do elsewhere.
   ============================================================================= */

:root {
  /* Palette (mirrors brand.json.palette) */
  --bg-page:          #F5F1E8;
  --bg-alt:           #EDE7D8;
  --bg-card:          #FBF8F1;
  --ink:              #1F2A3D;
  --ink-soft:         #4B5468;
  --ink-muted:        #7A8194;
  --rule:             #C9C0AB;
  --accent-primary:   #B24A2E;   /* cinnabar — used sparingly */
  --accent-secondary: #3A5A7C;   /* slate blue — links, secondary emphasis */

  /* Type */
  --font-serif: "Newsreader", "Iowan Old Style", Georgia, "Times New Roman", serif;
  --font-sans:  "Inter Tight", ui-sans-serif, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;

  /* Sizing (fluid) */
  --step--1: clamp(0.80rem, 0.78rem + 0.10vw, 0.86rem);
  --step-0:  clamp(1.00rem, 0.96rem + 0.20vw, 1.10rem);
  --step-1:  clamp(1.13rem, 1.06rem + 0.30vw, 1.30rem);
  --step-2:  clamp(1.32rem, 1.20rem + 0.55vw, 1.65rem);
  --step-3:  clamp(1.60rem, 1.38rem + 1.00vw, 2.20rem);
  --step-4:  clamp(2.00rem, 1.60rem + 1.80vw, 3.10rem);
  --step-5:  clamp(2.60rem, 2.00rem + 2.60vw, 4.20rem);

  /* Rhythm */
  --lh-tight: 1.15;
  --lh-snug:  1.32;
  --lh-body:  1.65;

  /* Layout */
  --measure-prose: 66ch;
  --container:     1120px;
  --container-narrow: 780px;
  --gutter: clamp(1rem, 2vw + 0.5rem, 2rem);

  /* Motion */
  --ease: cubic-bezier(0.2, 0.6, 0.2, 1);
}

/* Reset ------------------------------------------------------------------- */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, picture, svg { max-width: 100%; display: block; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
input, textarea, select { font: inherit; }
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid var(--accent-secondary); outline-offset: 3px; }

/* Base -------------------------------------------------------------------- */

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

body {
  background: var(--bg-page);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: var(--lh-body);
  font-feature-settings: "ss01" on, "ss02" on, "cv11" on;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--accent-primary); color: var(--bg-page); }

.skip-link {
  position: absolute; top: -100px; left: 8px;
  background: var(--ink); color: var(--bg-page);
  padding: 0.6rem 0.9rem; font-family: var(--font-sans); font-size: var(--step--1);
  letter-spacing: 0.08em; text-transform: uppercase;
  z-index: 100;
}
.skip-link:focus { top: 8px; }

/* Layout containers ------------------------------------------------------- */

.container       { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.container--narrow { width: 100%; max-width: var(--container-narrow); margin-inline: auto; padding-inline: var(--gutter); }
.container--prose  { width: 100%; max-width: var(--measure-prose); margin-inline: auto; padding-inline: var(--gutter); }

/* Typography -------------------------------------------------------------- */

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: var(--lh-snug);
  color: var(--ink);
  text-wrap: balance;
}
h1 { font-size: var(--step-5); line-height: var(--lh-tight); letter-spacing: -0.005em; font-weight: 500; }
h2 { font-size: var(--step-3); font-weight: 500; }
h3 { font-size: var(--step-2); font-weight: 500; }
h4 { font-size: var(--step-1); font-weight: 500; }

p  { line-height: var(--lh-body); }

.kicker {
  font-family: var(--font-sans);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 0.6rem 0;
}

.kicker--accent { color: var(--accent-primary); }

.eyebrow {
  font-family: var(--font-sans);
  font-size: var(--step--1);
  letter-spacing: 0.06em;
  color: var(--ink-muted);
}

.lead {
  font-family: var(--font-serif);
  font-size: var(--step-2);
  line-height: var(--lh-snug);
  color: var(--ink);
  font-weight: 400;
  max-width: 40ch;
}

/* Prose (long-form reading passages) */
.prose {
  font-family: var(--font-serif);
  font-size: var(--step-1);
  line-height: 1.7;
  color: var(--ink);
  max-width: var(--measure-prose);
}
.prose p + p    { margin-top: 1.1em; }
.prose h2       { margin-top: 2.4em; font-size: var(--step-2); }
.prose h3       { margin-top: 2.0em; font-size: var(--step-1); }
.prose h2 + p,
.prose h3 + p   { margin-top: 0.6em; }
.prose em       { font-style: italic; }
.prose a        { color: var(--accent-secondary); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 0.15em; }
.prose a:hover  { color: var(--accent-primary); }
.prose ol,
.prose ul       { margin-top: 1em; padding-left: 1.2em; }
.prose ol       { list-style: decimal; }
.prose ul       { list-style: disc; }
.prose li + li  { margin-top: 0.4em; }

/* Links (general) */
a.link,
.link-inline {
  color: var(--accent-secondary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
  transition: color 200ms var(--ease);
}
a.link:hover,
.link-inline:hover { color: var(--accent-primary); }

/* Arrow link ("See the guides →") */
.link-arrow {
  font-family: var(--font-sans);
  font-size: var(--step-0);
  color: var(--accent-secondary);
  text-decoration: none;
  border-bottom: 1px solid var(--accent-secondary);
  padding-bottom: 2px;
  display: inline-block;
  transition: color 200ms var(--ease), border-color 200ms var(--ease), transform 200ms var(--ease);
}
.link-arrow:hover { color: var(--accent-primary); border-color: var(--accent-primary); }
.link-arrow .arrow { display: inline-block; margin-left: 0.2em; transition: transform 200ms var(--ease); }
.link-arrow:hover .arrow { transform: translateX(3px); }

/* Buttons ----------------------------------------------------------------- */

.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: var(--step-0);
  font-weight: 500;
  color: var(--accent-primary);
  background: transparent;
  border: 1px solid var(--accent-primary);
  padding: 0.72rem 1.15rem;
  text-decoration: none;
  transition: color 200ms var(--ease), background-color 200ms var(--ease);
}
.btn:hover {
  background: var(--accent-primary);
  color: var(--bg-page);
}
.btn:focus-visible { outline-offset: 2px; }

.btn--ghost {
  color: var(--accent-secondary);
  border: 0;
  border-bottom: 1px solid var(--accent-secondary);
  padding: 0.72rem 0.1rem;
  background: transparent;
}
.btn--ghost:hover {
  color: var(--accent-primary);
  border-bottom-color: var(--accent-primary);
  background: transparent;
}

.btn-row { display: flex; flex-wrap: wrap; gap: 1rem 1.6rem; align-items: baseline; }

/* Seam rule --------------------------------------------------------------- */

hr.seam {
  border: 0;
  border-top: 1px solid var(--accent-primary);
  max-width: var(--container);
  margin: 0 auto;
  width: calc(100% - (var(--gutter) * 2));
  opacity: 0.85;
}

hr.rule {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 2rem 0;
}

/* Nav / Header ------------------------------------------------------------ */

.site-header {
  position: sticky; top: 0; z-index: 40;
  background: var(--bg-page);
  border-bottom: 1px solid var(--rule);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem var(--gutter);
  max-width: var(--container);
  margin-inline: auto;
}

.nav__brand {
  font-family: var(--font-serif);
  font-size: var(--step-1);
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.005em;
  text-decoration: none;
  line-height: 1;
}
.nav__brand em {
  color: var(--accent-primary);
  font-style: normal;
  font-weight: 500;
}
.nav__brand-mark {
  font-family: var(--font-sans);
  font-size: var(--step--1);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
  display: block;
  margin-top: 2px;
}

.nav__links {
  display: flex;
  gap: 1.6rem;
  align-items: center;
}
.nav__links a {
  font-family: var(--font-sans);
  font-size: var(--step-0);
  color: var(--ink);
  text-decoration: none;
  padding: 0.3rem 0;
  border-bottom: 1px solid transparent;
  transition: border-color 200ms var(--ease), color 200ms var(--ease);
}
.nav__links a:hover,
.nav__links a[aria-current="page"] {
  border-bottom-color: var(--accent-primary);
  color: var(--ink);
}

.nav__toggle {
  display: none;
  width: 44px; height: 44px;
  border: 1px solid var(--rule);
  position: relative;
  background: transparent;
}
.nav__toggle::before,
.nav__toggle::after {
  content: "";
  position: absolute;
  left: 10px; right: 10px;
  height: 1.5px;
  background: var(--ink);
  transition: transform 200ms var(--ease), top 200ms var(--ease);
}
.nav__toggle::before { top: 15px; }
.nav__toggle::after  { top: 25px; }
.nav.is-open .nav__toggle::before { top: 20px; transform: rotate(45deg); }
.nav.is-open .nav__toggle::after  { top: 20px; transform: rotate(-45deg); }

@media (max-width: 720px) {
  .nav__toggle { display: block; }
  .nav__links {
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: var(--bg-page);
    border-bottom: 1px solid var(--rule);
    padding: 0.5rem var(--gutter) 1.2rem;
    display: none;
  }
  .nav.is-open .nav__links { display: flex; }
  .nav__links a {
    width: 100%; padding: 0.7rem 0;
    border-bottom: 1px solid var(--rule);
  }
  .nav__links li:last-child a { border-bottom: 0; }
}

/* Hero -------------------------------------------------------------------- */

.hero {
  padding: clamp(3.5rem, 8vw, 6.5rem) 0 clamp(3rem, 6vw, 5rem);
}
.hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
}
@media (min-width: 900px) {
  .hero__inner {
    grid-template-columns: 12ch minmax(0, 1fr);
    gap: 2rem;
  }
  .hero__folio { text-align: right; padding-top: 0.65rem; }
}
.hero__folio { color: var(--ink-muted); }
.hero__folio .kicker { margin: 0; }
.hero__body { max-width: 32ch; }
.hero__title {
  font-family: var(--font-serif);
  font-size: var(--step-5);
  line-height: var(--lh-tight);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0 0 1.2rem 0;
  max-width: 22ch;
}
.hero__title em {
  color: var(--accent-primary);
  font-style: italic;
  font-weight: 500;
}
.hero__sub {
  font-family: var(--font-serif);
  font-size: var(--step-1);
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 46ch;
  margin-bottom: 1.8rem;
}

/* Hero-lite (interior pages) */
.hero-lite {
  padding: clamp(2.4rem, 5vw, 3.6rem) 0 clamp(2rem, 4vw, 3rem);
}
.hero-lite__title {
  font-family: var(--font-serif);
  font-size: var(--step-4);
  line-height: var(--lh-tight);
  font-weight: 500;
  color: var(--ink);
  margin: 0 0 0.9rem 0;
  max-width: 26ch;
}
.hero-lite__sub {
  font-family: var(--font-serif);
  font-size: var(--step-1);
  color: var(--ink-soft);
  max-width: 52ch;
}

/* Sections ---------------------------------------------------------------- */

.section {
  padding: clamp(3rem, 6vw, 5rem) 0;
}
.section--tight {
  padding: clamp(2rem, 4vw, 3rem) 0;
}

/* Two-column: folio kicker on the left, content on the right.
   Desktop grid: narrow left column (like a page-margin marginal). */
.section__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.2rem;
}
@media (min-width: 900px) {
  .section__row {
    grid-template-columns: 12ch minmax(0, 1fr);
    gap: 2.4rem;
  }
  .section__folio {
    text-align: right;
    padding-top: 0.4rem;
    position: sticky; top: 5.2rem;
    align-self: start;
  }
  .section__folio .kicker { display: inline-block; }
}

.section__body { max-width: 68ch; }
.section__body--wide { max-width: none; }

.section__title {
  font-family: var(--font-serif);
  font-size: var(--step-3);
  font-weight: 500;
  color: var(--ink);
  line-height: var(--lh-snug);
  margin: 0 0 1rem 0;
  max-width: 30ch;
}
.section__intro {
  font-family: var(--font-serif);
  font-size: var(--step-1);
  color: var(--ink-soft);
  max-width: 52ch;
  margin-bottom: 1.6rem;
}

/* Pillars grid ------------------------------------------------------------ */

.pillars {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem 3rem;
}
@media (min-width: 720px) {
  .pillars { grid-template-columns: 1fr 1fr; gap: 2.4rem 3.2rem; }
}
.pillar {
  border-top: 1px solid var(--rule);
  padding-top: 1.2rem;
}
.pillar__title {
  font-family: var(--font-serif);
  font-size: var(--step-2);
  font-weight: 500;
  margin: 0 0 0.5rem 0;
}
.pillar__one-liner {
  font-family: var(--font-serif);
  font-size: var(--step-0);
  color: var(--ink-soft);
  line-height: 1.55;
  margin-bottom: 0.9rem;
  max-width: 42ch;
}

/* Guide card -------------------------------------------------------------- */

.guides-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.2rem;
}
@media (min-width: 720px) {
  .guides-grid { grid-template-columns: 1fr 1fr; gap: 2.4rem 2rem; }
}
@media (min-width: 1080px) {
  .guides-grid--four { grid-template-columns: repeat(4, 1fr); gap: 2rem 1.8rem; }
  .guides-grid--three { grid-template-columns: repeat(3, 1fr); }
}

.guide-card {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
}
.guide-card__plate {
  background: var(--bg-card);
  border: 1px solid var(--rule);
  aspect-ratio: 3 / 4;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1rem;
  color: var(--ink);
}
.guide-card__plate-title {
  font-family: var(--font-serif);
  font-size: var(--step-1);
  line-height: 1.2;
  font-weight: 500;
  color: var(--ink);
  max-width: 14ch;
}
.guide-card__plate-mark {
  font-family: var(--font-sans);
  font-size: var(--step--1);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.guide-card__pillar {
  font-family: var(--font-sans);
  font-size: var(--step--1);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-primary);
  margin: 0;
}
.guide-card__title {
  font-family: var(--font-serif);
  font-size: var(--step-2);
  line-height: 1.2;
  font-weight: 500;
  margin: 0;
  color: var(--ink);
}
.guide-card__subtitle {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--step-0);
  color: var(--ink-soft);
  line-height: 1.4;
  margin: 0;
}
.guide-card__meta {
  font-family: var(--font-sans);
  font-size: var(--step--1);
  letter-spacing: 0.06em;
  color: var(--ink-muted);
  display: flex;
  gap: 0.6rem;
  align-items: baseline;
}
.guide-card__meta .dot { color: var(--rule); }
.guide-card__desc {
  font-family: var(--font-serif);
  font-size: var(--step-0);
  color: var(--ink-soft);
  line-height: 1.55;
  margin: 0;
  max-width: 42ch;
}
.guide-card__order {
  font-family: var(--font-sans);
  font-size: var(--step--1);
  color: var(--ink-muted);
  margin-top: auto;
  padding-top: 0.4rem;
}
.guide-card__order a { color: var(--accent-secondary); border-bottom: 1px solid var(--accent-secondary); }
.guide-card__order a:hover { color: var(--accent-primary); border-bottom-color: var(--accent-primary); }

/* Editorial process (numbered list) --------------------------------------- */

.editorial-list {
  counter-reset: step;
  display: grid;
  gap: 1.4rem;
  max-width: 60ch;
}
.editorial-list li {
  counter-increment: step;
  padding-left: 3rem;
  position: relative;
  font-family: var(--font-serif);
  font-size: var(--step-1);
  color: var(--ink);
  line-height: 1.55;
}
.editorial-list li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0; top: 0.15em;
  font-family: var(--font-sans);
  font-size: var(--step--1);
  letter-spacing: 0.14em;
  color: var(--accent-primary);
}

/* Definition list --------------------------------------------------------- */

.dl {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.2rem;
}
@media (min-width: 720px) {
  .dl { grid-template-columns: 18ch minmax(0, 1fr); gap: 1.6rem 2rem; }
}
.dl__row {
  display: contents;
}
.dl dt {
  font-family: var(--font-sans);
  font-size: var(--step--1);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding-top: 0.35em;
}
.dl dd {
  font-family: var(--font-serif);
  font-size: var(--step-1);
  line-height: 1.5;
  color: var(--ink);
  margin: 0;
}
.dl dd + dt { border-top: 1px solid var(--rule); padding-top: 1.2rem; }
.dl dd + dt + dd { border-top: 1px solid var(--rule); padding-top: 1.2rem; }
.dl dd a { color: var(--accent-secondary); border-bottom: 1px solid var(--accent-secondary); }
.dl dd a:hover { color: var(--accent-primary); border-bottom-color: var(--accent-primary); }

/* FAQ (dl with cinnabar seams) ------------------------------------------- */

.faq {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--rule);
}
.faq__item {
  padding: 1.3rem 0;
  border-bottom: 1px solid var(--rule);
}
.faq__q {
  font-family: var(--font-serif);
  font-size: var(--step-1);
  font-weight: 500;
  color: var(--ink);
  margin: 0 0 0.4rem 0;
}
.faq__a {
  font-family: var(--font-serif);
  font-size: var(--step-0);
  color: var(--ink-soft);
  line-height: 1.55;
  margin: 0;
  max-width: 60ch;
}

/* Pull quote -------------------------------------------------------------- */

.pull {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--step-3);
  line-height: 1.35;
  color: var(--ink);
  max-width: 26ch;
  margin: 0 auto;
  text-align: center;
  position: relative;
  padding: 1rem 0;
}
.pull::before,
.pull::after {
  content: "";
  display: block;
  width: 4rem;
  height: 1px;
  background: var(--accent-primary);
  margin: 1.4rem auto;
}
.pull__attr {
  font-family: var(--font-sans);
  font-style: normal;
  font-size: var(--step--1);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
  display: block;
}

/* Bands (libraries, contact) --------------------------------------------- */

.band {
  background: var(--bg-alt);
  padding: clamp(2.4rem, 5vw, 3.6rem) 0;
}
.band__inner {
  max-width: 60ch;
}
.band__title {
  font-family: var(--font-serif);
  font-size: var(--step-2);
  font-weight: 500;
  margin: 0 0 0.6rem 0;
}
.band__body {
  font-family: var(--font-serif);
  font-size: var(--step-1);
  color: var(--ink-soft);
  margin-bottom: 1rem;
}

/* Tiles (for-libraries: what we license) --------------------------------- */

.tiles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.6rem;
}
@media (min-width: 720px) {
  .tiles { grid-template-columns: repeat(3, 1fr); gap: 2rem; }
}
.tile {
  background: var(--bg-card);
  border: 1px solid var(--rule);
  padding: 1.4rem 1.3rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.tile__mark {
  font-family: var(--font-sans);
  font-size: var(--step--1);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-primary);
}
.tile__title {
  font-family: var(--font-serif);
  font-size: var(--step-1);
  font-weight: 500;
  color: var(--ink);
  margin: 0;
}
.tile__body {
  font-family: var(--font-serif);
  font-size: var(--step-0);
  color: var(--ink-soft);
  line-height: 1.55;
  margin: 0;
}

/* Pricing tiers (definition list styling for the library page) ---------- */

.tiers {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--rule);
}
.tier {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--rule);
}
@media (min-width: 720px) {
  .tier {
    grid-template-columns: 16ch minmax(0, 1fr) auto;
    gap: 2rem;
    align-items: baseline;
  }
}
.tier__name {
  font-family: var(--font-serif);
  font-size: var(--step-2);
  font-weight: 500;
  color: var(--ink);
}
.tier__scope {
  font-family: var(--font-sans);
  font-size: var(--step--1);
  letter-spacing: 0.06em;
  color: var(--ink-muted);
  display: block;
  margin-top: 0.15em;
}
.tier__body {
  font-family: var(--font-serif);
  font-size: var(--step-0);
  color: var(--ink-soft);
  line-height: 1.55;
  max-width: 52ch;
}
.tier__cta {
  font-family: var(--font-sans);
  font-size: var(--step-0);
  color: var(--accent-secondary);
  border-bottom: 1px solid var(--accent-secondary);
  white-space: nowrap;
}
.tier__cta:hover { color: var(--accent-primary); border-bottom-color: var(--accent-primary); }

/* Ordered plain list (for-libraries "what arrives", refund flow) --------- */

.plain-list {
  counter-reset: item;
  display: grid;
  gap: 0.8rem;
  max-width: 60ch;
}
.plain-list li {
  counter-increment: item;
  padding-left: 2.2rem;
  position: relative;
  font-family: var(--font-serif);
  font-size: var(--step-0);
  color: var(--ink);
  line-height: 1.55;
}
.plain-list li::before {
  content: counter(item) ".";
  position: absolute;
  left: 0; top: 0;
  font-family: var(--font-sans);
  color: var(--accent-primary);
  font-size: var(--step--1);
  letter-spacing: 0.06em;
}

/* Footer ----------------------------------------------------------------- */

.site-footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--rule);
  padding: clamp(2.5rem, 5vw, 4rem) 0 clamp(1.6rem, 3vw, 2.4rem);
  margin-top: clamp(3rem, 6vw, 5rem);
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem 3rem;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
@media (min-width: 720px) {
  .site-footer__grid { grid-template-columns: 2fr repeat(3, 1fr); }
}
.site-footer h4 {
  font-family: var(--font-sans);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 0.9rem 0;
}
.site-footer ul { display: grid; gap: 0.4rem; }
.site-footer li a {
  font-family: var(--font-sans);
  font-size: var(--step-0);
  color: var(--ink);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: border-color 200ms var(--ease);
}
.site-footer li a:hover { border-bottom-color: var(--accent-primary); }
.site-footer__colophon {
  font-family: var(--font-serif);
  font-size: var(--step-0);
  color: var(--ink-soft);
  line-height: 1.5;
  max-width: 40ch;
}
.site-footer__colophon .mark {
  font-family: var(--font-serif);
  font-size: var(--step-1);
  color: var(--ink);
  display: block;
  margin-bottom: 0.4rem;
}
.site-footer__colophon .mark em {
  color: var(--accent-primary);
  font-style: normal;
}
.site-footer__legal {
  max-width: var(--container);
  margin: 2.5rem auto 0;
  padding: 1.2rem var(--gutter) 0;
  border-top: 1px solid var(--rule);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.6rem;
  font-family: var(--font-sans);
  font-size: var(--step--1);
  color: var(--ink-muted);
}

/* Reveal on scroll ------------------------------------------------------- */

[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 600ms var(--ease), transform 600ms var(--ease);
  will-change: opacity, transform;
}
[data-reveal].is-in {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}

/* Small helpers ---------------------------------------------------------- */

.mt-1  { margin-top: 0.5rem; }
.mt-2  { margin-top: 1rem; }
.mt-3  { margin-top: 1.6rem; }
.mt-4  { margin-top: 2.4rem; }
.mb-1  { margin-bottom: 0.5rem; }
.mb-2  { margin-bottom: 1rem; }
.mb-3  { margin-bottom: 1.6rem; }
.mb-4  { margin-bottom: 2.4rem; }
.txt-center { text-align: center; }
.muted { color: var(--ink-muted); }
.soft  { color: var(--ink-soft); }

/* Print ------------------------------------------------------------------ */

@media print {
  body { background: #fff; color: #000; }
  .site-header, .site-footer, .band, .nav__toggle, hr.seam { display: none; }
  a { color: #000; text-decoration: underline; }
  .prose, .guide-card, .tier { break-inside: avoid; }
}