:root {
  --ink: #15130f;
  --ink-soft: #3f3a32;
  --paper: #f4f0e8;
  --paper-light: #fbfaf7;
  --line: #d8d0c2;
  --ember: #ff5c2e;
  --amber: #ffb45e;
  --dark: #0c0b09;
  --dark-soft: #17140f;
  --serif: Georgia, "Times New Roman", serif;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --wrap: 1140px;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--paper-light);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.7;
}

body::before {
  background-image: radial-gradient(rgba(21, 19, 15, .07) .65px, transparent .65px);
  background-size: 7px 7px;
  content: "";
  inset: 0;
  opacity: .14;
  pointer-events: none;
  position: fixed;
  z-index: 20;
}

::selection {
  background: var(--ember);
  color: white;
}

a {
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
}

button,
input {
  font: inherit;
}

.skip-link {
  background: white;
  left: 1rem;
  padding: .75rem 1rem;
  position: fixed;
  top: -5rem;
  z-index: 100;
}

.skip-link:focus {
  top: 1rem;
}

.wrap {
  margin-inline: auto;
  max-width: var(--wrap);
  padding-inline: 28px;
}

.guide-hero {
  background: var(--dark);
  color: white;
  min-height: min(780px, 100svh);
  overflow: hidden;
  position: relative;
}

.guide-hero__image {
  height: 100%;
  inset: 0;
  object-fit: cover;
  object-position: 57% 44%;
  position: absolute;
  transform: scale(1.03);
  width: 100%;
}

.guide-hero::after {
  background:
    linear-gradient(90deg, rgba(12, 11, 9, .97) 0%, rgba(12, 11, 9, .87) 34%, rgba(12, 11, 9, .36) 67%, rgba(12, 11, 9, .05) 100%),
    linear-gradient(0deg, rgba(12, 11, 9, .88) 0%, transparent 42%);
  content: "";
  inset: 0;
  position: absolute;
}

.guide-nav,
.guide-hero__content {
  position: relative;
  z-index: 2;
}

.guide-nav {
  align-items: center;
  display: flex;
  justify-content: space-between;
  padding-block: 22px;
}

.brand {
  align-items: center;
  display: inline-flex;
  gap: 11px;
  text-decoration: none;
}

.brand img {
  background: white;
  border-radius: 10px;
  height: 38px;
  object-fit: contain;
  padding: 7px;
  width: 38px;
}

.brand strong {
  font-size: 1.2rem;
  letter-spacing: -.02em;
}

.guide-nav__links {
  align-items: center;
  display: flex;
  gap: 22px;
}

.guide-nav__links a {
  color: rgba(255, 255, 255, .76);
  font-size: .9rem;
  font-weight: 700;
  text-decoration: none;
}

.guide-nav__links a:hover,
.guide-nav__links a:focus-visible {
  color: white;
}

.button {
  align-items: center;
  background: linear-gradient(100deg, var(--ember), var(--amber));
  border: 0;
  border-radius: 999px;
  color: white;
  cursor: pointer;
  display: inline-flex;
  font-size: .95rem;
  font-weight: 800;
  justify-content: center;
  min-height: 48px;
  padding: 11px 23px;
  text-decoration: none;
  transition: transform .18s ease, box-shadow .18s ease;
}

.button:hover {
  box-shadow: 0 14px 34px -18px rgba(255, 92, 46, .9);
  transform: translateY(-2px);
}

.button--quiet {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, .25);
}

.guide-hero__content {
  align-items: flex-start;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: calc(min(780px, 100svh) - 90px);
  max-width: 700px;
  padding-block: 48px 88px;
}

.eyebrow {
  align-items: center;
  color: var(--amber);
  display: inline-flex;
  font-size: .76rem;
  font-weight: 800;
  gap: 10px;
  letter-spacing: .18em;
  margin: 0 0 22px;
  text-transform: uppercase;
}

.eyebrow::before {
  background: linear-gradient(90deg, var(--ember), var(--amber));
  content: "";
  height: 2px;
  width: 32px;
}

h1,
h2,
h3 {
  text-wrap: balance;
}

h1 {
  font-family: var(--serif);
  font-size: clamp(3rem, 7vw, 5.8rem);
  font-weight: 400;
  letter-spacing: -.055em;
  line-height: .98;
  margin: 0;
  max-width: 11ch;
}

.guide-hero__lead {
  color: rgba(255, 255, 255, .76);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  margin: 28px 0 32px;
  max-width: 38em;
}

.hero-actions {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-meta {
  color: rgba(255, 255, 255, .52);
  font-size: .82rem;
  margin-top: 22px;
}

.article-shell {
  display: grid;
  gap: 76px;
  grid-template-columns: minmax(0, 1fr) 270px;
  padding-block: 96px 120px;
}

.article {
  min-width: 0;
}

.article section {
  border-top: 1px solid var(--line);
  padding-block: 74px;
}

.article section:first-child {
  border-top: 0;
  padding-top: 0;
}

.article h2 {
  font-family: var(--serif);
  font-size: clamp(2.1rem, 4.3vw, 3.5rem);
  font-weight: 400;
  letter-spacing: -.04em;
  line-height: 1.05;
  margin: 0 0 22px;
}

.article h3 {
  font-size: 1.12rem;
  line-height: 1.35;
  margin: 32px 0 10px;
}

.article p {
  color: var(--ink-soft);
  max-width: 70ch;
}

.article p strong {
  color: var(--ink);
}

.answer {
  color: var(--ink) !important;
  font-family: var(--serif);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1.35;
  margin-top: 0;
  max-width: 30ch !important;
}

.note {
  border-left: 3px solid var(--ember);
  color: #5a5044;
  font-size: .92rem;
  margin-block: 28px;
  padding: 2px 0 2px 20px;
}

.guide-toc {
  align-self: start;
  position: sticky;
  top: 28px;
}

.guide-toc p {
  color: #81786c;
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: .15em;
  margin: 0 0 14px;
  text-transform: uppercase;
}

.guide-toc ol {
  border-left: 1px solid var(--line);
  list-style: none;
  margin: 0;
  padding: 0 0 0 20px;
}

.guide-toc li + li {
  margin-top: 11px;
}

.guide-toc a {
  color: #71695e;
  font-size: .86rem;
  font-weight: 650;
  text-decoration: none;
}

.guide-toc a:hover {
  color: var(--ember);
}

.table-scroll {
  margin-block: 34px;
  overflow-x: auto;
}

.comparison {
  border-collapse: collapse;
  font-size: .9rem;
  min-width: 720px;
  width: 100%;
}

.comparison th {
  background: var(--ink);
  color: white;
  font-size: .7rem;
  letter-spacing: .1em;
  padding: 15px 16px;
  text-align: left;
  text-transform: uppercase;
}

.comparison td {
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  padding: 17px 16px;
  vertical-align: top;
}

.comparison tbody tr {
  transition: background .15s ease, transform .15s ease;
}

.comparison tbody tr:hover {
  background: #fff5ef;
}

.comparison strong {
  color: var(--ink);
}

.cost-list {
  counter-reset: cost;
  list-style: none;
  margin: 38px 0 0;
  padding: 0;
}

.cost-list li {
  border-top: 1px solid var(--line);
  display: grid;
  gap: 12px 26px;
  grid-template-columns: 48px 1fr;
  padding-block: 25px;
}

.cost-list li::before {
  color: var(--ember);
  content: "0" counter(cost);
  counter-increment: cost;
  font-family: var(--serif);
  font-size: 1.25rem;
}

.cost-list h3 {
  margin: 0 0 5px;
}

.cost-list p {
  margin: 0;
}

.calculator {
  background: var(--dark);
  color: white;
  margin-block: 38px;
  overflow: hidden;
  padding: clamp(26px, 5vw, 48px);
  position: relative;
}

.calculator::after {
  background: radial-gradient(circle, rgba(255, 92, 46, .32), transparent 66%);
  content: "";
  height: 360px;
  pointer-events: none;
  position: absolute;
  right: -170px;
  top: -170px;
  width: 360px;
}

.calculator h3 {
  font-family: var(--serif);
  font-size: 2rem;
  font-weight: 400;
  margin: 0 0 8px;
}

.calculator__intro {
  color: rgba(255, 255, 255, .66) !important;
  margin: 0 0 30px;
}

.calculator__grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  position: relative;
  z-index: 1;
}

.field label,
.field legend {
  color: rgba(255, 255, 255, .74);
  display: block;
  font-size: .76rem;
  font-weight: 800;
  letter-spacing: .06em;
  margin-bottom: 7px;
  text-transform: uppercase;
}

.field input[type="number"] {
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .2);
  border-radius: 0;
  color: white;
  min-height: 48px;
  padding: 10px 13px;
  width: 100%;
}

.field input:focus-visible {
  border-color: var(--amber);
  outline: 2px solid transparent;
}

.periods {
  border: 0;
  grid-column: 1 / -1;
  margin: 0;
  padding: 0;
}

.periods__options {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.periods label {
  cursor: pointer;
}

.periods input {
  opacity: 0;
  position: absolute;
}

.periods span {
  border: 1px solid rgba(255, 255, 255, .2);
  display: block;
  padding: 8px 14px;
}

.periods input:checked + span,
.periods input:focus-visible + span {
  background: white;
  color: var(--ink);
}

.calculator__actions {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  grid-column: 1 / -1;
  margin-top: 6px;
}

.calculator__actions .button--quiet {
  color: white;
}

.calculator__result {
  border-top: 1px solid rgba(255, 255, 255, .18);
  display: grid;
  gap: 18px;
  grid-column: 1 / -1;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 14px;
  padding-top: 25px;
}

.result-label {
  color: rgba(255, 255, 255, .52);
  display: block;
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .07em;
  text-transform: uppercase;
}

.result-value {
  display: block;
  font-family: var(--serif);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1.2;
  margin-top: 5px;
}

.pagewren-tier {
  background: var(--paper);
  border-bottom: 3px solid var(--ember);
  display: grid;
  gap: 26px 50px;
  grid-template-columns: 1fr 1fr;
  margin-block: 36px;
  padding: clamp(28px, 5vw, 52px);
}

.pagewren-tier__price {
  color: var(--ember);
  font-family: var(--serif);
  font-size: clamp(3.3rem, 7vw, 5.6rem);
  letter-spacing: -.055em;
  line-height: .9;
  margin: 10px 0 18px;
}

.pagewren-tier__price small {
  color: var(--ink-soft);
  display: block;
  font-family: var(--sans);
  font-size: .75rem;
  letter-spacing: 0;
  line-height: 1.4;
  margin-top: 13px;
}

.check-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.check-list li {
  border-bottom: 1px solid var(--line);
  padding: 10px 0 10px 26px;
  position: relative;
}

.check-list li::before {
  color: var(--ember);
  content: "↳";
  left: 0;
  position: absolute;
}

.faq {
  border-top: 1px solid var(--line);
}

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

.faq summary {
  cursor: pointer;
  font-family: var(--serif);
  font-size: 1.25rem;
  list-style: none;
  padding: 22px 42px 22px 0;
  position: relative;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  color: var(--ember);
  content: "+";
  font-family: var(--sans);
  position: absolute;
  right: 5px;
}

.faq details[open] summary::after {
  content: "−";
}

.faq details p {
  margin: 0;
  padding: 0 36px 24px 0;
}

.source-list {
  font-size: .9rem;
  padding-left: 22px;
}

.source-list li + li {
  margin-top: 10px;
}

.source-list a {
  text-decoration-color: var(--amber);
  text-underline-offset: 3px;
}

.decision-cta {
  align-items: center;
  border-block: 1px solid var(--line);
  display: flex;
  gap: 28px;
  justify-content: space-between;
  margin-top: 36px;
  padding-block: 26px;
}

.decision-cta p {
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(1.15rem, 2.2vw, 1.45rem);
  line-height: 1.4;
  margin: 0;
  max-width: 39ch;
}

.decision-cta .button {
  flex: 0 0 auto;
}

.final-cta {
  background: var(--dark);
  color: white;
  overflow: hidden;
  padding-block: 94px;
  position: relative;
}

.final-cta::after {
  background: url("/assets/wren-poster.jpg") center 44% / cover no-repeat;
  content: "";
  inset: 0;
  opacity: .16;
  position: absolute;
}

.final-cta .wrap {
  position: relative;
  z-index: 1;
}

.final-cta h2 {
  font-family: var(--serif);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 400;
  letter-spacing: -.05em;
  line-height: 1;
  margin: 0 0 22px;
  max-width: 13ch;
}

.final-cta p {
  color: rgba(255, 255, 255, .7);
  margin-bottom: 28px;
  max-width: 42em;
}

.site-footer {
  background: var(--dark);
  border-top: 1px solid rgba(255, 255, 255, .12);
  color: rgba(255, 255, 255, .58);
  font-size: .82rem;
  padding-block: 35px;
}

.site-footer .wrap {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: space-between;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.site-footer a {
  text-decoration-color: rgba(255, 255, 255, .24);
  text-underline-offset: 3px;
}

.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .65s ease, transform .65s ease;
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

.guide-hero__content > * {
  animation: hero-rise .7s ease both;
}

.guide-hero__content > :nth-child(2) { animation-delay: .08s; }
.guide-hero__content > :nth-child(3) { animation-delay: .16s; }
.guide-hero__content > :nth-child(4) { animation-delay: .24s; }
.guide-hero__content > :nth-child(5) { animation-delay: .32s; }

@keyframes hero-rise {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
}

@media (max-width: 900px) {
  .article-shell {
    display: block;
  }

  .guide-toc {
    border-bottom: 1px solid var(--line);
    margin-bottom: 58px;
    padding-bottom: 30px;
    position: static;
  }

  .guide-toc ol {
    columns: 2;
  }
}

@media (max-width: 680px) {
  body {
    font-size: 16px;
  }

  .wrap {
    padding-inline: 19px;
  }

  .guide-nav__links > a:not(.button) {
    display: none;
  }

  .guide-nav__links {
    gap: 8px;
  }

  .guide-nav__links .button {
    min-height: 42px;
    padding: 8px 15px;
  }

  .guide-hero__image {
    object-position: 65% 44%;
  }

  .guide-hero::after {
    background:
      linear-gradient(90deg, rgba(12, 11, 9, .94), rgba(12, 11, 9, .55)),
      linear-gradient(0deg, rgba(12, 11, 9, .95), transparent 52%);
  }

  h1 {
    font-size: clamp(2.75rem, 12.5vw, 3.75rem);
    line-height: 1.04;
  }

  .guide-hero__content {
    min-height: calc(100svh - 82px);
    padding-block: 32px 56px;
  }

  .eyebrow {
    margin-bottom: 16px;
  }

  .guide-hero__lead {
    margin-block: 18px 22px;
  }

  .hero-meta {
    margin-top: 15px;
  }

  .article-shell {
    padding-block: 68px 82px;
  }

  .article section {
    padding-block: 56px;
  }

  .guide-toc ol {
    columns: 1;
  }

  .calculator__grid,
  .calculator__result,
  .pagewren-tier {
    grid-template-columns: 1fr;
  }

  .calculator__result {
    gap: 13px;
  }

  .cost-list li {
    grid-template-columns: 36px 1fr;
  }

  .decision-cta {
    align-items: flex-start;
    flex-direction: column;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ==========================================================================
   GUIDE FAMILY — Opus 5 visual direction

   Each chapter shares the same paper, sunset and typography, but earns its own
   editorial device. These are deliberately layout primitives rather than
   component cards: ledger, curtain, margin note, numbered gutter, salon rhythm,
   before/after seam and one continuous scroll spine.
   ========================================================================== */

.chapter {
  --chapter-accent: var(--ember);
  --chapter-mark: "01 / 08";
}

.chapter .guide-hero__content::after {
  color: rgba(255, 255, 255, .16);
  content: var(--chapter-mark);
  font-family: var(--serif);
  font-size: clamp(4.5rem, 12vw, 10rem);
  line-height: .8;
  pointer-events: none;
  position: absolute;
  right: 28px;
  top: 50%;
  transform: translateY(-50%);
  writing-mode: vertical-rl;
}

.chapter .article a:not(.button) {
  text-decoration-color: color-mix(in srgb, var(--chapter-accent) 60%, transparent);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  transition: text-decoration-color .15s ease, text-decoration-thickness .15s ease;
}

.chapter .article a:not(.button):hover,
.chapter .article a:not(.button):focus-visible {
  text-decoration-color: var(--chapter-accent);
  text-decoration-thickness: 2px;
}

.lede {
  border-top: 2px solid var(--chapter-accent);
  color: var(--ink) !important;
  font-family: var(--serif);
  font-size: clamp(1.28rem, 2.5vw, 1.7rem);
  letter-spacing: .01em;
  line-height: 1.45;
  margin-top: 0;
  max-width: 34ch !important;
  padding-top: 20px;
}

.aside--ember {
  border-left: 2px solid var(--chapter-accent);
  color: var(--ink-soft);
  font-size: .9rem;
  margin-block: 30px;
  max-width: 64ch;
  padding: 3px 0 3px 20px;
}

.rule--section {
  background: rgba(21, 19, 15, .12);
  border: 0;
  height: 1px;
  margin: 4.5rem 0 2rem;
  transform-origin: left center;
}

.js .rule--section {
  transform: scaleX(0);
  transition: transform .45s ease;
}

.js .rule--section.is-visible {
  transform: scaleX(1);
}

.article--wide {
  max-width: 880px;
}

.article-shell--wide {
  grid-template-columns: minmax(0, 1fr) 230px;
}

.fact-strip {
  border-block: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-block: 34px;
}

.fact-strip > div {
  padding: 24px 22px;
}

.fact-strip > div + div {
  border-left: 1px solid var(--line);
}

.fact-strip strong {
  display: block;
  font-family: var(--serif);
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  font-weight: 400;
  line-height: 1;
  margin-bottom: 8px;
}

.fact-strip span {
  color: var(--ink-soft);
  font-size: .82rem;
}

.source-stamp {
  color: #7b7267;
  display: block;
  font-size: .72rem;
  margin-top: 7px;
}

.source-stamp a {
  font-weight: 750;
}

.section-intro {
  color: var(--ink-soft);
  font-size: 1.05rem;
  margin-bottom: 36px;
  max-width: 62ch;
}

.guide-list {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
}

.guide-list li {
  border-top: 1px solid var(--line);
  display: grid;
  gap: 12px 30px;
  grid-template-columns: minmax(130px, .35fr) 1fr;
  padding-block: 24px;
}

.guide-list strong {
  font-family: var(--serif);
  font-size: 1.18rem;
  font-weight: 400;
}

.guide-list p {
  margin: 0;
}

.related-guides {
  border-top: 1px solid var(--line);
  margin-top: 52px;
  padding-top: 24px;
}

.related-guides h3 {
  font-size: .72rem;
  letter-spacing: .14em;
  margin: 0 0 16px;
  text-transform: uppercase;
}

.related-guides nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
}

.related-guides a {
  font-size: .9rem;
  font-weight: 750;
}

/* Chapter 02 — rental ledger */
.chapter--ledger {
  --chapter-mark: "02 / 08";
}

.chapter--ledger .guide-hero__image {
  object-position: 62% 45%;
}

.ledger {
  border-left: 2px solid var(--chapter-accent);
  margin: 38px 0;
  padding-left: clamp(18px, 4vw, 42px);
}

.ledger__head,
.ledger__row {
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(135px, 1.1fr) 90px 100px 1fr;
}

.ledger__head {
  color: #7f776c;
  font-size: .67rem;
  font-weight: 800;
  letter-spacing: .1em;
  padding: 0 0 12px;
  text-transform: uppercase;
}

.ledger__row {
  border-top: 1px solid var(--line);
  min-height: 104px;
  padding-block: 18px;
}

.ledger__provider strong {
  display: block;
}

.ledger__provider a {
  font-size: .78rem;
}

.ledger__price {
  color: var(--chapter-accent);
  font-family: var(--serif);
  font-size: 1.55rem;
  line-height: 1.1;
}

.ledger__price small,
.ledger__row > span,
.ledger__row > div:last-child {
  color: var(--ink-soft);
  font-family: var(--sans);
  font-size: .77rem;
  line-height: 1.45;
}

.ledger__price small {
  display: block;
  margin-top: 4px;
}

/* Chapter 03 — curtain / preview */
.chapter--curtain {
  --chapter-mark: "03 / 08";
}

.chapter--curtain .guide-hero__image {
  clip-path: inset(0 0 25% 0);
  object-position: 52% 40%;
  transition: clip-path 1s cubic-bezier(.2, .8, .2, 1);
}

.chapter--curtain .guide-hero::before {
  background: linear-gradient(90deg, transparent, var(--chapter-accent), transparent);
  bottom: 25%;
  content: "";
  height: 2px;
  left: 0;
  position: absolute;
  width: 100%;
  z-index: 2;
}

.browser-outline {
  border: 1px solid var(--ink);
  margin-block: 38px;
  min-height: 330px;
  overflow: hidden;
  position: relative;
}

.browser-outline__bar {
  align-items: center;
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 7px;
  height: 42px;
  padding-inline: 15px;
}

.browser-outline__bar i {
  border: 1px solid var(--ink);
  border-radius: 50%;
  display: block;
  height: 7px;
  opacity: .5;
  width: 7px;
}

.browser-outline__stage {
  align-items: center;
  background:
    linear-gradient(100deg, rgba(12, 11, 9, .96), rgba(12, 11, 9, .22)),
    url("/assets/wren-poster.jpg") 54% 43% / cover;
  color: white;
  display: flex;
  min-height: 287px;
  padding: 44px;
}

.browser-outline__stage strong {
  font-family: var(--serif);
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 400;
  line-height: 1;
  max-width: 10ch;
}

.process-line {
  counter-reset: process;
  list-style: none;
  margin: 38px 0 0;
  padding: 0;
}

.process-line li {
  border-top: 1px solid var(--line);
  display: grid;
  gap: 24px;
  grid-template-columns: 48px 1fr;
  padding-block: 27px;
}

.process-line li::before {
  color: var(--chapter-accent);
  content: "0" counter(process);
  counter-increment: process;
  font-family: var(--serif);
  font-size: 1.35rem;
}

.process-line h3 {
  margin-top: 0;
}

/* Chapter 04 — ZZP desk notes */
.chapter--desk {
  --chapter-mark: "04 / 08";
}

.chapter--desk .guide-hero__image {
  filter: saturate(.84) contrast(1.04);
  object-position: 69% 42%;
}

.desk-passage {
  display: grid;
  gap: 30px;
  grid-template-columns: minmax(0, 1fr) 210px;
  margin-block: 34px;
}

.desk-note {
  align-self: start;
  border-left: 2px solid var(--chapter-accent);
  color: #766d61;
  font-family: var(--serif);
  font-size: .92rem;
  font-style: italic;
  line-height: 1.55;
  padding-left: 16px;
}

.choice-lines {
  border-block: 1px solid var(--line);
  margin-block: 36px;
}

.choice-lines > div {
  display: grid;
  gap: 28px;
  grid-template-columns: 1fr 1fr;
  padding-block: 24px;
}

.choice-lines > div + div {
  border-top: 1px solid var(--line);
}

.choice-lines strong {
  font-family: var(--serif);
  font-size: 1.18rem;
  font-weight: 400;
}

/* Chapter 05 — plumber / numbered gutter */
.chapter--plumb {
  --chapter-mark: "05 / 08";
}

.chapter--plumb .guide-hero__image {
  filter: contrast(1.12) saturate(.72);
  object-position: 64% 48%;
}

.plumb-steps {
  counter-reset: plumb;
  list-style: none;
  margin: 42px 0 0;
  padding: 0;
}

.plumb-steps li {
  border-top: 1px solid var(--ink);
  display: grid;
  gap: 26px;
  grid-template-columns: 108px 1fr;
  padding-block: 30px;
}

.plumb-steps li::before {
  color: var(--chapter-accent);
  content: "0" counter(plumb);
  counter-increment: plumb;
  font-family: var(--serif);
  font-size: clamp(3rem, 7vw, 5.2rem);
  line-height: .8;
}

.plumb-steps h3 {
  font-size: 1.35rem;
  margin-top: 0;
}

.service-route {
  border-block: 1px solid var(--ink);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-block: 38px;
}

.service-route span {
  font-size: .78rem;
  font-weight: 800;
  padding: 20px 14px;
  text-align: center;
}

.service-route span + span {
  border-left: 1px solid var(--line);
}

/* Chapter 06 — salon rhythm */
.chapter--salon {
  --chapter-mark: "06 / 08";
}

.chapter--salon .guide-hero__image {
  filter: sepia(.14) saturate(.78) brightness(1.03);
  object-position: 72% 44%;
}

.salon-rhythm {
  margin-block: 38px;
}

.salon-beat {
  border-top: 1px solid var(--line);
  display: grid;
  gap: 36px;
  grid-template-columns: .8fr 1.2fr;
  padding-block: 42px;
}

.salon-beat:nth-child(even) {
  grid-template-columns: 1.2fr .8fr;
}

.salon-beat:nth-child(even) > :first-child {
  grid-column: 2;
  grid-row: 1;
}

.salon-beat::before {
  color: var(--chapter-accent);
  content: "● ─";
  font-size: .72rem;
  letter-spacing: .3em;
  position: absolute;
}

.salon-beat h3 {
  font-family: var(--serif);
  font-size: clamp(1.65rem, 3.5vw, 2.5rem);
  font-weight: 400;
  margin: 28px 0 0;
}

/* Chapter 07 — switching seam */
.chapter--seam {
  --chapter-mark: "07 / 08";
}

.chapter--seam .guide-hero__image {
  filter: grayscale(.2) contrast(1.08);
  object-position: 58% 43%;
}

.before-after {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin-block: 38px;
}

.before-after > div {
  padding: clamp(24px, 4vw, 42px);
}

.before-after > div:first-child {
  border-right: 1px solid var(--chapter-accent);
  color: #756d62;
  font-family: var(--serif);
}

.before-after > div:last-child {
  color: var(--ink);
}

.before-after h3 {
  font-family: var(--serif);
  font-size: 1.55rem;
  font-weight: 400;
  margin-top: 0;
}

.before-after ol {
  padding-left: 22px;
}

.before-after li + li {
  margin-top: 12px;
}

.handover-list {
  counter-reset: handover;
  list-style: none;
  margin: 34px 0;
  padding: 0;
}

.handover-list li {
  border-top: 1px solid var(--line);
  display: grid;
  gap: 26px;
  grid-template-columns: 44px 1fr;
  padding-block: 22px;
}

.handover-list li::before {
  color: var(--chapter-accent);
  content: counter(handover);
  counter-increment: handover;
  font-family: var(--serif);
  font-size: 1.4rem;
}

/* Chapter 08 — continuous one-page spine */
.chapter--spine {
  --chapter-mark: "08 / 08";
}

.chapter--spine .guide-hero__image {
  object-position: 76% 44%;
}

.scroll-spine {
  border-left: 2px solid var(--chapter-accent);
  margin-left: 14px;
  padding-left: clamp(28px, 5vw, 58px);
  position: relative;
}

.scroll-spine section {
  border-top: 0;
  padding-block: 56px;
  position: relative;
}

.scroll-spine section::before {
  background: var(--paper-light);
  border: 2px solid var(--chapter-accent);
  border-radius: 50%;
  content: "";
  height: 11px;
  left: calc(clamp(28px, 5vw, 58px) * -1 - 7px);
  position: absolute;
  top: 66px;
  width: 11px;
}

.fit-check {
  border-block: 1px solid var(--ink);
  margin-block: 38px;
  padding-block: 10px;
}

.fit-check label {
  align-items: flex-start;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  display: grid;
  gap: 15px;
  grid-template-columns: 24px 1fr;
  padding-block: 16px;
}

.fit-check label:last-of-type {
  border-bottom: 0;
}

.fit-check input {
  accent-color: var(--chapter-accent);
  height: 18px;
  margin-top: 4px;
  width: 18px;
}

.fit-result {
  border-left: 3px solid var(--chapter-accent);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.25rem;
  margin-block: 26px;
  padding: 8px 0 8px 20px;
}

@media (max-width: 760px) {
  .chapter .guide-hero__content::after {
    display: none;
  }

  .fact-strip {
    grid-template-columns: 1fr;
  }

  .fact-strip > div + div {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .guide-list li,
  .desk-passage,
  .choice-lines > div,
  .salon-beat,
  .salon-beat:nth-child(even),
  .before-after {
    grid-template-columns: 1fr;
  }

  .desk-note {
    margin-left: 18px;
    max-width: 32ch;
  }

  .salon-beat:nth-child(even) > :first-child {
    grid-column: auto;
    grid-row: auto;
  }

  .ledger__head {
    display: none;
  }

  .ledger__row {
    gap: 9px;
    grid-template-columns: 1fr auto;
  }

  .ledger__provider,
  .ledger__row > div:last-child {
    grid-column: 1 / -1;
  }

  .plumb-steps li {
    grid-template-columns: 68px 1fr;
  }

  .service-route {
    grid-template-columns: 1fr 1fr;
  }

  .service-route span:nth-child(3) {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .service-route span:nth-child(4) {
    border-top: 1px solid var(--line);
  }

  .before-after > div:first-child {
    border-bottom: 1px solid var(--chapter-accent);
    border-right: 0;
  }

  .chapter--curtain .guide-hero__image {
    clip-path: inset(0 0 18% 0);
  }

  .chapter--curtain .guide-hero::before {
    bottom: 18%;
  }

  .browser-outline__stage {
    min-height: 245px;
    padding: 28px;
  }
}