:root {
  --book-ink: #0b1730;
  --book-muted: #5d6678;
  --book-blue: #123c73;
  --book-blue-2: #0c2c57;
  --book-saffron: #d97706;
  --book-green: #12805c;
  --book-line: #e2e8f0;
  --book-paper: #ffffff;
  --book-soft: #f6f8fb;
  --book-shadow: 0 24px 70px rgba(11, 23, 48, 0.12);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body.rti-book-body {
  margin: 0;
  color: var(--book-ink);
  background: #fff;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.6;
}
.rti-book-shell a { color: var(--book-blue); }
.rti-book-shell img { max-width: 100%; height: auto; }
.rti-book-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px clamp(18px, 4vw, 54px);
  background: rgba(255, 255, 255, 0.86);
  border-bottom: 1px solid rgba(226, 232, 240, 0.9);
  backdrop-filter: blur(18px);
}
.rti-book-brand { color: var(--book-ink); font-weight: 850; text-decoration: none; }
.rti-book-nav-links { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; justify-content: flex-end; }
.rti-book-nav-links a { color: var(--book-muted); font-size: 0.92rem; font-weight: 720; text-decoration: none; }
.rti-book-section, .rti-book-hero, .rti-toolkit, .rti-testimonials, .rti-faq, .rti-guide-article, .rti-promo-kit, .rti-scroll-story, .rti-inline-hook, .rti-book-video {
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(54px, 8vw, 110px) clamp(18px, 4vw, 54px);
}
.rti-book-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 480px);
  gap: clamp(28px, 6vw, 76px);
  align-items: center;
  min-height: calc(100vh - 78px);
  padding-top: clamp(44px, 7vw, 84px);
}
.rti-book-kicker {
  margin: 0 0 12px;
  color: var(--book-saffron);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.rti-book-hero h1, .rti-book-section h2, .rti-toolkit h2, .rti-testimonials h2, .rti-faq h2, .rti-guide-article h1, .rti-promo-kit h1, .rti-scroll-story h2, .rti-inline-hook h2, .rti-book-video h2 {
  margin: 0 0 18px;
  color: var(--book-ink);
  font-weight: 880;
  letter-spacing: 0;
  line-height: 1.02;
}
.rti-book-hero h1 { font-size: clamp(3rem, 7vw, 6.7rem); max-width: 820px; }
.rti-book-section h2, .rti-toolkit h2, .rti-testimonials h2, .rti-faq h2, .rti-scroll-story h2, .rti-book-video h2 { font-size: clamp(2rem, 4vw, 4.2rem); }
.rti-inline-hook h2 { font-size: clamp(1.65rem, 3vw, 3rem); }
.rti-book-subtitle, .rti-book-section p, .rti-toolkit p, .rti-guide-article p, .rti-promo-kit p, .rti-book-video p {
  color: var(--book-muted);
  font-size: clamp(1.02rem, 1.4vw, 1.2rem);
}
.rti-book-subtitle { max-width: 700px; margin: 0; }
.rti-book-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.rti-book-btn {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 12px 19px;
  font-weight: 850;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}
.rti-book-btn:hover { transform: translateY(-1px); text-decoration: none; }
.rti-book-btn-primary { background: var(--book-green); color: #fff !important; box-shadow: 0 12px 28px rgba(18, 128, 92, 0.24); }
.rti-book-btn-secondary { background: #fff; color: var(--book-blue) !important; border-color: #cbd5e1; }
.rti-book-trust { margin-top: 16px; color: #667085; font-size: 0.96rem; }
.rti-book-hero-visual { position: sticky; top: 92px; align-self: start; }
.rti-book-mockup {
  margin: 0;
  padding: 18px;
  border-radius: 28px;
  background: linear-gradient(155deg, #f8fafc, #fff 45%, #fff7ed);
  border: 1px solid rgba(18, 60, 115, 0.12);
  box-shadow: var(--book-shadow);
}
.rti-book-mockup img { display: block; border-radius: 20px; }
.rti-book-mockup figcaption { margin-top: 12px; color: var(--book-muted); font-size: 0.92rem; }
.rti-book-mockup-compact { max-width: 260px; padding: 10px; }
.rti-book-photos {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(360px, 1.28fr);
  gap: clamp(24px, 5vw, 52px);
  align-items: center;
}
.rti-book-photo-grid {
  display: grid;
  gap: 16px;
}
.rti-book-photo-grid figure, .rti-promo-assets figure {
  margin: 0;
}
.rti-book-photo-grid img, .rti-promo-assets img {
  display: block;
  width: 100%;
  border-radius: 18px;
  border: 1px solid rgba(18, 60, 115, 0.12);
  box-shadow: 0 18px 44px rgba(11, 23, 48, 0.12);
}
.rti-book-photo-grid figcaption, .rti-promo-assets figcaption {
  margin-top: 8px;
  color: var(--book-muted);
  font-size: 0.9rem;
  font-weight: 750;
}
.rti-book-video {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(360px, 1.28fr);
  gap: clamp(24px, 5vw, 52px);
  align-items: center;
}
.rti-book-video-frame {
  aspect-ratio: 16 / 9;
  border-radius: 22px;
  overflow: hidden;
  background: #0b1730;
  border: 1px solid rgba(18, 60, 115, 0.16);
  box-shadow: var(--book-shadow);
}
.rti-book-video-frame iframe {
  width: 100%;
  height: 100%;
  display: block;
  border: 0;
}
.rti-book-video, #reviews { scroll-margin-top: 120px; }
.rti-scroll-story {
  --scroll-progress: 0;
  display: grid;
  grid-template-columns: minmax(300px, 0.92fr) minmax(0, 1.08fr);
  gap: clamp(28px, 7vw, 86px);
  align-items: start;
}
.rti-scroll-visual {
  position: sticky;
  top: 96px;
  min-height: 72vh;
  display: grid;
  place-items: center;
}
.rti-scroll-device {
  width: min(100%, 430px);
  aspect-ratio: 0.74;
  border-radius: 42px;
  padding: 16px;
  background: linear-gradient(145deg, #09152b, #1f3151);
  box-shadow: 0 34px 90px rgba(11, 23, 48, 0.28);
  transform: translateY(calc((1 - var(--scroll-progress)) * 18px)) scale(calc(0.94 + (var(--scroll-progress) * 0.06)));
  transition: transform 0.18s linear;
}
.rti-scroll-screen {
  height: 100%;
  border-radius: 30px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
  color: #fff;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0)),
    linear-gradient(155deg, #143c6c, #12805c 58%, #d97706);
}
.rti-scroll-screen:before {
  content: "";
  display: block;
  width: 44%;
  height: 8px;
  margin: 0 auto auto;
  border-radius: 999px;
  background: rgba(255,255,255,0.72);
}
.rti-scroll-step-number {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(255,255,255,0.18);
  border: 1px solid rgba(255,255,255,0.34);
  font-size: 1.45rem;
  font-weight: 900;
}
.rti-scroll-screen strong { display: block; margin-top: 18px; font-size: clamp(2rem, 4vw, 3.8rem); line-height: 0.96; letter-spacing: 0; }
.rti-scroll-screen p { max-width: 290px; color: rgba(255,255,255,0.86); font-weight: 720; }
.rti-scroll-progress {
  height: 8px;
  border-radius: 999px;
  background: rgba(255,255,255,0.22);
  overflow: hidden;
}
.rti-scroll-progress span {
  display: block;
  height: 100%;
  width: calc(var(--scroll-progress) * 100%);
  border-radius: inherit;
  background: #fff;
}
.rti-scroll-copy { padding-top: 6vh; }
.rti-scroll-step {
  min-height: 62vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  opacity: 0.36;
  transform: translateY(24px);
  transition: opacity 0.35s ease, transform 0.35s ease;
}
.rti-scroll-step.is-active { opacity: 1; transform: none; }
.rti-scroll-step > span {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  margin-bottom: 16px;
  border-radius: 50%;
  color: #fff;
  background: var(--book-blue);
  font-weight: 900;
}
.rti-scroll-step h3 {
  margin: 0 0 12px;
  color: var(--book-ink);
  font-size: clamp(1.6rem, 3vw, 3rem);
  line-height: 1.04;
}
.rti-scroll-step p { margin: 0; color: var(--book-muted); font-size: clamp(1.02rem, 1.4vw, 1.2rem); }
.rti-scroll-step .rti-book-actions { margin-top: 24px; }
.rti-inline-hook {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 22px;
  align-items: center;
  margin-block: clamp(10px, 3vw, 32px);
  border-block: 1px solid var(--book-line);
  background: linear-gradient(90deg, #f8fafc, #fff 56%, #fff7ed);
}
.rti-inline-hook p { margin: 0; color: var(--book-muted); font-size: 1.04rem; }
.rti-inline-hook-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 12px; min-width: min(100%, 390px); }
.rti-scroll-story, .rti-inline-hook, #free-rti-toolkit { scroll-margin-top: 130px; }
.rti-feature-grid, .rti-audience-grid, .rti-mistake-grid, .rti-promo-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 28px;
}
.rti-feature, .rti-audience, .rti-mistake, .rti-promo-box, .rti-book-card, .rti-toolkit-mini {
  border: 1px solid var(--book-line);
  border-radius: 18px;
  background: #fff;
  padding: 22px;
  box-shadow: 0 10px 32px rgba(11, 23, 48, 0.05);
}
.rti-feature strong, .rti-audience strong, .rti-mistake strong { display: block; margin-bottom: 8px; color: var(--book-ink); font-size: 1.08rem; }
.rti-book-band { background: linear-gradient(180deg, #fff, var(--book-soft)); border-block: 1px solid var(--book-line); }
.rti-toolkit {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 430px);
  gap: 38px;
  align-items: center;
}
.rti-check-list { list-style: none; margin: 20px 0 0; padding: 0; display: grid; gap: 10px; }
.rti-check-list li { position: relative; padding-left: 30px; color: #243047; font-weight: 700; }
.rti-check-list li:before { content: ""; position: absolute; left: 0; top: 0.35em; width: 17px; height: 17px; border-radius: 50%; background: var(--book-green); box-shadow: inset 0 0 0 5px #dff7ef; }
.rti-lead-form { display: grid; gap: 12px; margin-top: 24px; padding: 16px; border: 1px solid var(--book-line); border-radius: 16px; background: #fff; }
.rti-lead-form label span { display: block; color: #475569; font-size: 0.78rem; font-weight: 850; text-transform: uppercase; letter-spacing: 0.08em; }
.rti-lead-form input { width: 100%; margin-top: 4px; padding: 12px; border: 1px solid #cbd5e1; border-radius: 10px; font: inherit; }
.rti-lead-form button { border: 0; border-radius: 999px; padding: 13px 16px; color: #fff; background: var(--book-blue); font: inherit; font-weight: 850; cursor: pointer; }
.rti-lead-form button:disabled { cursor: wait; opacity: 0.72; }
.rti-lead-form small { color: var(--book-muted); }
.rti-lead-form small.is-success { color: var(--book-green); font-weight: 800; }
.rti-lead-form small.is-error { color: #b42318; font-weight: 800; }
.rti-hp-field { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.rti-testimonial-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.rti-testimonial-grid blockquote { margin: 0; padding: 22px; border: 1px solid var(--book-line); border-radius: 18px; background: #fff; }
.rti-testimonial-grid p { margin: 0 0 14px; color: #27364d; font-size: 1.05rem; }
.rti-testimonial-grid cite { color: var(--book-muted); font-style: normal; font-weight: 800; }
.rti-placeholder-note { color: var(--book-muted); font-size: 0.92rem; }
.rti-faq details { border-top: 1px solid var(--book-line); padding: 18px 0; }
.rti-faq summary { cursor: pointer; color: var(--book-ink); font-size: 1.08rem; font-weight: 850; }
.rti-faq details p { max-width: 820px; margin: 12px 0 0; color: var(--book-muted); }
.rti-sticky-book-cta {
  position: static;
  z-index: 25;
  max-width: 900px;
  margin: 20px auto;
  padding: 10px 12px 10px 18px;
  border: 1px solid rgba(18, 60, 115, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 16px 44px rgba(11, 23, 48, 0.16);
  backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}
.rti-sticky-book-cta span { font-weight: 850; color: var(--book-ink); }
.rti-mobile-book-cta {
  display: none;
  position: fixed;
  left: 16px;
  right: 16px;
  bottom: 14px;
  z-index: 40;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: var(--book-green);
  color: #fff !important;
  font-weight: 900;
  text-decoration: none;
  box-shadow: 0 12px 34px rgba(18, 128, 92, 0.34);
}
.rti-book-card {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
}
.rti-book-card img { border-radius: 12px; box-shadow: 0 12px 30px rgba(11, 23, 48, 0.14); }
.rti-book-card h2 { margin: 0 0 8px; font-size: clamp(1.35rem, 2.5vw, 2.1rem); line-height: 1.1; }
.rti-home-book-funnel { margin: 18px 0 24px; }
.rti-home-book-hero, .rti-home-footer-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 22px;
  align-items: center;
  border: 1px solid var(--book-line);
  border-radius: 22px;
  padding: clamp(22px, 4vw, 38px);
  background: linear-gradient(135deg, #fff, #f8fbff 62%, #fff7ed);
  box-shadow: 0 16px 46px rgba(11, 23, 48, 0.08);
}
.rti-home-book-hero h2, .rti-home-footer-cta strong { margin: 0 0 10px; font-size: clamp(1.7rem, 3vw, 3rem); line-height: 1.08; color: var(--book-ink); }
.rti-home-book-grid { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr); gap: 16px; margin-top: 16px; }
.rti-home-footer-cta { margin-top: 16px; grid-template-columns: minmax(0, 1fr) auto; }
.rti-home-footer-cta span { color: var(--book-muted); }
body.claude-shell .wiki-body .rti-home-book-strip,
.rti-home-book-strip {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  border: 1px solid var(--book-line);
  border-radius: 14px;
  padding: 10px 12px;
  background: linear-gradient(135deg, #fff 0%, #f8fbff 100%);
  box-shadow: 0 8px 20px rgba(11, 23, 48, 0.05);
}
.rti-home-book-cover {
  display: block;
  width: 58px;
  line-height: 0;
}
.rti-home-book-strip img {
  display: block;
  width: 58px;
  height: 76px;
  object-fit: cover;
  object-position: center top;
  border-radius: 6px;
  box-shadow: 0 6px 14px rgba(11, 23, 48, 0.14);
}
.rti-home-book-copy { min-width: 0; }
body.claude-shell .wiki-body .rti-home-book-strip h2,
.rti-home-book-strip h2 {
  margin: 0 0 3px;
  color: var(--book-ink);
  font-size: 1.08rem;
  line-height: 1.2;
  letter-spacing: 0;
}
body.claude-shell .wiki-body .rti-home-book-strip p:not(.rti-book-kicker),
.rti-home-book-strip p:not(.rti-book-kicker) {
  margin: 0;
  color: var(--book-muted);
  font-size: 0.92rem;
  line-height: 1.45;
}
body.claude-shell .wiki-body .rti-home-book-strip .rti-book-kicker,
.rti-home-book-strip .rti-book-kicker {
  margin-bottom: 3px;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
}
.rti-home-book-strip-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.rti-book-btn-compact {
  min-height: 42px;
  padding: 10px 14px;
  font-size: 0.9rem;
  box-shadow: none;
}
.rti-guide-article { max-width: 980px; }
.rti-guide-article h1 { font-size: clamp(2.3rem, 5vw, 4.8rem); }
.rti-guide-article h2 { margin-top: 42px; color: var(--book-ink); font-size: clamp(1.45rem, 2.5vw, 2.25rem); line-height: 1.12; }
.rti-guide-article li { margin: 9px 0; }
.rti-promo-copy { border: 1px solid var(--book-line); border-radius: 16px; padding: 18px; background: var(--book-soft); }
.rti-promo-assets {
  display: grid;
  grid-template-columns: 0.55fr 1fr 1fr;
  gap: 16px;
  align-items: end;
  margin: 28px 0;
}
.rti-promo-copy pre {
  white-space: pre-wrap;
  margin: 10px 0 0;
  padding: 14px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--book-line);
  color: #243047;
  font-family: inherit;
}
.rti-share-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.rti-share-row a { border: 1px solid var(--book-line); border-radius: 999px; padding: 10px 14px; text-decoration: none; font-weight: 850; }
[data-reveal] { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
[data-reveal].is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  .rti-book-btn:hover { transform: none; }
  .rti-scroll-device, .rti-scroll-step { transform: none; transition: none; }
  .rti-scroll-step { opacity: 1; }
}
@media (max-width: 880px) {
  .rti-book-nav { align-items: flex-start; flex-direction: column; }
  .rti-book-hero, .rti-toolkit, .rti-book-photos, .rti-book-video, .rti-home-book-hero, .rti-home-book-grid, .rti-home-footer-cta, .rti-scroll-story, .rti-inline-hook { grid-template-columns: 1fr; }
  .rti-home-book-strip { grid-template-columns: 54px minmax(0, 1fr); padding: 12px; }
  .rti-home-book-cover { width: 54px; }
  .rti-home-book-strip img { width: 54px; height: 72px; }
  .rti-home-book-strip-actions { grid-column: 1 / -1; justify-content: flex-start; }
  .rti-book-hero { min-height: auto; }
  .rti-book-hero-visual, .rti-scroll-visual { position: static; min-height: auto; }
  .rti-scroll-device { max-width: 320px; }
  .rti-scroll-step { min-height: auto; padding: 34px 0; opacity: 1; transform: none; }
  .rti-inline-hook-actions { justify-content: flex-start; min-width: 0; }
  .rti-feature-grid, .rti-audience-grid, .rti-mistake-grid, .rti-promo-grid, .rti-testimonial-grid, .rti-promo-assets { grid-template-columns: 1fr; }
  .rti-book-card { grid-template-columns: 90px 1fr; padding: 16px; }
  .rti-sticky-book-cta { display: none; }
  .rti-mobile-book-cta { display: flex; }
  body.rti-book-body { padding-bottom: 76px; }
  body.claude-shell:has(.rti-mobile-book-cta) { padding-bottom: 76px; }
}
@media (max-width: 560px) {
  .rti-book-actions { flex-direction: column; }
  .rti-book-btn { width: 100%; }
  .rti-home-book-strip { gap: 10px; }
  .rti-home-book-strip p:not(.rti-book-kicker) { font-size: 0.88rem; line-height: 1.38; }
  .rti-home-book-strip .rti-book-btn {
    width: auto;
    min-width: 0;
    flex: 1 1 calc(50% - 4px);
    padding: 9px 8px;
  }
  .rti-book-hero h1 { font-size: 2.8rem; }
  .rti-book-section, .rti-book-hero, .rti-toolkit, .rti-testimonials, .rti-faq, .rti-guide-article, .rti-promo-kit, .rti-scroll-story, .rti-inline-hook, .rti-book-video { padding-inline: 16px; }
  .rti-scroll-screen { padding: 22px; }
}