:root {
  color-scheme: light;
  --paper: #fff;
  --ink: #000;
  --urgency: #bd251a;
  --button: #17672b;
  --button-hover: #104d1e;
  --line: #dedede;
  font-family: Arial, Helvetica, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-padding-top: 24px; }
body { margin: 0; color: var(--ink); background: var(--paper); font-size: 19px; line-height: 1.7; }
::selection { color: #fff; background: #000; }
a { color: inherit; text-underline-offset: 4px; }
img { display: block; max-width: 100%; height: auto; }
figure, h1, h2, h3, p { margin: 0; }
h1, h2, h3 { color: var(--ink); line-height: 1.2; }
h1 { font-size: clamp(35px, 3.8vw, 48px); font-weight: 800; letter-spacing: -.035em; text-wrap: balance; }
h2 { font-size: clamp(28px, 3vw, 36px); font-weight: 800; letter-spacing: -.025em; margin-bottom: 26px; text-wrap: balance; }
h3 { font-size: 23px; font-weight: 750; margin-bottom: 14px; }
p { max-width: 65ch; }
p + p { margin-top: 20px; }
strong { font-weight: 700; }
.wide { width: min(1040px, calc(100% - 64px)); margin-inline: auto; }
.letter { width: min(760px, calc(100% - 48px)); margin-inline: auto; }
.letter-section { padding-block: 58px; border-top: 1px solid var(--line); }
a:focus-visible, summary:focus-visible { outline: 3px solid #000; outline-offset: 5px; }
.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; }
.skip-link { position: fixed; top: -100px; left: 16px; z-index: 10; padding: 12px 20px; border: 1px solid #000; background: #fff; }
.skip-link:focus { top: 16px; }
.urgency-strip { padding: 13px 24px; color: #fff; background: var(--urgency); text-align: center; font-size: 15px; line-height: 1.5; }
.urgency-strip p { max-width: 950px; margin-inline: auto; }
.hero { padding-block: 38px 56px; }
.book-introduction { max-width: none; margin-bottom: 18px; text-align: center; font-size: 17px; }
.hero h1 { max-width: 1020px; margin-inline: auto; text-align: center; }
.headline-emphasis { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 6px; }
.hero-product { display: grid; grid-template-columns: 264px minmax(0, 1fr); grid-template-rows: auto auto; gap: 20px 55px; max-width: 840px; margin: 34px auto 0; }
.hero-cover { grid-row: 1 / 3; }
.book-cover img { width: 100%; object-fit: contain; box-shadow: 0 6px 22px #00000018; }
.hero-pitch { align-self: end; }
.hero-pitch p { font-size: 20px; line-height: 1.6; }
.hero-action { align-self: start; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 20px; width: min(100%, 370px); min-height: 62px; padding: 16px 22px; border: 1px solid var(--button); border-radius: 5px; background: var(--button); color: #fff; box-shadow: 0 3px 0 #00000024; text-align: center; font-size: 18px; font-weight: 750; line-height: 1.35; text-decoration: none; transition: background .15s; }
.button:hover { background: var(--button-hover); border-color: var(--button-hover); }
.button > span[aria-hidden] { font-size: 24px; font-weight: 400; line-height: 1; }
.link-note { margin-top: 12px; font-size: 13px; line-height: 1.5; }
.purchase-block { margin-top: 32px; text-align: center; }
.purchase-block .link-note { margin-inline: auto; }
.sales-bullets { padding: 0; margin: 0; list-style: none; }
.sales-bullets li { display: grid; grid-template-columns: 24px minmax(0, 1fr); gap: 14px; padding-block: 12px; }
.bullet { color: var(--urgency); font-size: 23px; line-height: 1.4; font-weight: 700; }
.section-conclusion { margin-top: 26px; font-size: 22px; }
.problem-layout { max-width: 760px; }
.method-list { list-style: none; padding: 0; margin: 30px 0 0; }
.method-list li { border-top: 1px solid var(--line); padding-block: 26px; }
.method-list li:last-child { padding-bottom: 0; }
.step-number { color: var(--urgency); padding-right: 5px; }
.audience-exclusion { margin-top: 32px; padding-top: 28px; border-top: 1px solid var(--line); }
.author-layout { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 32px; align-items: center; margin-bottom: 25px; }
.author-portrait img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; object-position: center 26%; }
.offer > h2 { text-align: center; }
.offer-layout { display: grid; grid-template-columns: 190px minmax(0, 1fr); align-items: center; gap: 44px; margin-top: 32px; }
.offer-action .button { margin-top: 26px; }
.faq-list { border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); }
summary { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 76px; padding: 20px 4px; list-style: none; font-size: 18px; font-weight: 700; line-height: 1.4; cursor: pointer; }
summary::-webkit-details-marker { display: none; }
summary > span { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; flex-shrink: 0; border: 1px solid #000; border-radius: 50%; font-size: 23px; font-weight: 400; line-height: 1; }
details[open] summary > span { transform: rotate(45deg); }
details p { padding: 0 4px 24px; font-size: 17px; }
.final-cta { text-align: center; padding-bottom: 65px; }
.final-cta > p { margin-inline: auto; }
.site-footer { padding-block: 25px; border-top: 1px solid var(--line); font-size: 13px; text-align: center; }
@media (max-width: 800px) {
  .hero-product { grid-template-columns: 230px minmax(0, 1fr); column-gap: 30px; }
  .hero-pitch p { font-size: 18px; }
}
@media (max-width: 600px) {
  body { font-size: 18px; }
  .wide, .letter { width: calc(100% - 40px); }
  .letter-section { padding-block: 42px; }
  .urgency-strip { padding: 12px 20px; font-size: 13px; }
  .hero { padding-block: 25px 42px; }
  .book-introduction { margin-bottom: 15px; font-size: 14px; line-height: 1.5; }
  h1 { font-size: clamp(25px, 6.8vw, 34px); line-height: 1.22; }
  h2 { font-size: 28px; margin-bottom: 22px; }
  h3 { font-size: 22px; }
  .hero-product { grid-template-columns: 112px minmax(0, 1fr); gap: 22px 20px; margin-top: 25px; }
  .hero-cover { grid-row: 1; }
  .hero-pitch { align-self: center; }
  .hero-pitch p { font-size: 16px; line-height: 1.55; }
  .hero-action { grid-column: 1 / -1; text-align: center; }
  .hero-action .link-note { margin-inline: auto; }
  .button { width: 100%; font-size: 17px; }
  .link-note { font-size: 12px; }
  .sales-bullets li { gap: 10px; padding-block: 11px; }
  .section-conclusion { font-size: 21px; }
  .method-list li { padding-block: 25px; }
  .method-list li:last-child { padding-bottom: 0; }
  .author-layout { grid-template-columns: 1fr; gap: 25px; }
  .author-portrait { width: 220px; margin-inline: auto; }
  .author-portrait img { aspect-ratio: 1; object-position: center 18%; }
  .offer-layout { grid-template-columns: 1fr; gap: 28px; }
  .offer-cover { width: 175px; margin-inline: auto; }
  .offer-action { text-align: center; }
  summary { font-size: 17px; }
  .final-cta { padding-bottom: 45px; }
}
@media (max-width: 360px) {
  .wide, .letter { width: calc(100% - 32px); }
  .hero-product { grid-template-columns: 100px minmax(0, 1fr); gap: 20px 15px; }
  .hero-pitch p { font-size: 15px; }
  .button { padding-inline: 15px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}