:root {
  --bg: #ffffff;
  --surface: #f3f7ff;
  --card: #ffffff;
  --ink: #0b1b3f;
  --muted: #4a5a7d;
  --border: #e1e9f7;
  --accent: #1d5bff;
  --accent-fill: #1d5bff;
  --accent-soft: #e8efff;
  --navy: #0a1c4a;
  --ink-rgb: 11, 27, 63;
  --accent-rgb: 29, 91, 255;
}

html[data-theme="dark"] {
  --bg: #071022;
  --surface: #0a1530;
  --card: #0e1c3f;
  --ink: #f1f5ff;
  --muted: #aab8d8;
  --border: #1f2f5a;
  --accent: #4a86ff;
  --accent-fill: #2d62e8;
  --accent-soft: #14275a;
  --navy: #0a1c4a;
  --ink-rgb: 255, 255, 255;
  --accent-rgb: 74, 134, 255;
}

.pg-insights-readiness {
  --fr-font: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --fr-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --fr-maxw: 1060px;
  --fr-gutter: clamp(20px, 6vw, 56px);
  --fr-railw: 64px;
  --fr-measure: 60ch;
  --fr-progress: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--fr-font);
  font-size: clamp(15px, 0.5vw + 13.8px, 17px);
  line-height: 1.6;
  padding-top: 100px;
  padding-bottom: clamp(48px, 8vw, 96px);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

:where(.pg-insights-readiness) *,
:where(.pg-insights-readiness) *::before,
:where(.pg-insights-readiness) *::after { box-sizing: border-box; }

:where(.pg-insights-readiness) p { margin: 0; }
:where(.pg-insights-readiness) h1,
:where(.pg-insights-readiness) h2,
:where(.pg-insights-readiness) h3 { margin: 0; font-weight: 600; }
:where(.pg-insights-readiness) ul,
:where(.pg-insights-readiness) ol { margin: 0; padding: 0; list-style: none; }

:where(.pg-insights-readiness) a:focus-visible,
:where(.pg-insights-readiness) button:focus-visible,
.pg-insights-readiness summary:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

/* Slim top bar */
.fr-top { border-bottom: 1px solid var(--border); }
.fr-top__wrap {
  max-width: var(--fr-maxw);
  margin-inline: auto;
  padding: 12px var(--fr-gutter) 0;
}
.fr-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-family: var(--fr-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.fr-crumb a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 6px;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.fr-crumb a:hover,
.fr-crumb a:focus-visible { color: var(--accent); border-bottom-color: currentColor; }
.fr-crumb [aria-current="page"] { color: var(--ink); }
.fr-crumb__sep { color: rgba(var(--ink-rgb), 0.35); }
.fr-top__bar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 0 16px;
}
.fr-top__kick {
  font-family: var(--fr-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
}
.fr-top__mid {
  font-family: var(--fr-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  padding-left: 14px;
  border-left: 1px solid var(--border);
}
.fr-top__mark {
  margin-left: auto;
  font-family: var(--fr-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink);
}

/* Page grid: rail + document */
.fr-page {
  max-width: var(--fr-maxw);
  margin-inline: auto;
  padding-inline: var(--fr-gutter);
  display: grid;
  grid-template-columns: var(--fr-railw) minmax(0, 1fr);
  column-gap: clamp(20px, 4vw, 56px);
}
.fr-rail { grid-column: 1; grid-row: 1; }
.fr-doc { grid-column: 2; grid-row: 1; min-width: 0; }

/* Progress rail */
.fr-rail {
  --fr-progress: 0;
  position: relative;
}
.fr-rail__inner { position: sticky; top: 120px; }
.fr-rail__list {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.fr-rail__list::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 21px;
  bottom: 21px;
  width: 2px;
  border-radius: 2px;
  background: var(--border);
}
.fr-rail__line {
  position: absolute;
  left: 6px;
  top: 21px;
  width: 2px;
  border-radius: 2px;
  background: var(--accent);
  height: calc(var(--fr-progress) * (100% - 42px));
  transition: height 0.18s linear;
}
.fr-rail__link {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  text-decoration: none;
  color: var(--muted);
}
.fr-rail__dot {
  flex: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--bg);
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}
.fr-rail__n {
  font-family: var(--fr-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
}
.fr-rail__link:hover .fr-rail__dot,
.fr-rail__link:focus-visible .fr-rail__dot { border-color: var(--accent); }
.fr-rail__link:hover .fr-rail__n { color: var(--ink); }
.fr-rail__item.is-active .fr-rail__dot {
  background: var(--accent);
  border-color: var(--accent);
  transform: scale(1.12);
}
.fr-rail__item.is-active .fr-rail__n { color: var(--ink); }
.fr-rail__bar { display: none; }

/* Document intro */
.fr-intro {
  padding-bottom: clamp(26px, 4vw, 48px);
  border-bottom: 1px solid var(--border);
}
.fr-h1 {
  font-size: clamp(2.3rem, 5.4vw, 4.3rem);
  font-weight: 500;
  letter-spacing: -0.032em;
  line-height: 1.02;
  max-width: 15ch;
}
.fr-intro__p {
  margin-top: 20px;
  max-width: 56ch;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  line-height: 1.62;
}

/* Chapters */
.fr-chapter {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 190px;
  gap: clamp(20px, 4vw, 48px);
  padding-block: clamp(32px, 5vw, 62px);
  border-top: 1px solid var(--border);
}
.fr-chapter__body { position: relative; min-width: 0; }
.fr-chapter__num {
  position: absolute;
  top: 0.02em;
  left: -0.06em;
  z-index: 0;
  font-size: clamp(5.4rem, 11vw, 10rem);
  font-weight: 800;
  line-height: 0.78;
  letter-spacing: -0.05em;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(var(--ink-rgb), 0.2);
  pointer-events: none;
  user-select: none;
  will-change: transform;
}
.fr-chapter__h {
  position: relative;
  z-index: 1;
  font-size: clamp(1.45rem, 3vw, 2.05rem);
  font-weight: 600;
  letter-spacing: -0.022em;
  line-height: 1.1;
  max-width: 22ch;
}
.fr-chapter__p {
  position: relative;
  z-index: 1;
  margin-top: 16px;
  max-width: var(--fr-measure);
  color: var(--muted);
  font-size: clamp(1.02rem, 1.35vw, 1.14rem);
  line-height: 1.72;
}

/* Margin note */
.fr-note { align-self: start; padding-top: 8px; }
.fr-note__k {
  display: block;
  font-family: var(--fr-mono);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}
.fr-note__p {
  position: relative;
  padding-left: 14px;
  font-size: 0.95rem;
  line-height: 1.45;
  color: var(--ink);
}
.fr-note__p::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  border-top: 2px solid var(--accent);
}

/* Pull quote */
.fr-quote {
  grid-column: 1 / -1;
  grid-row: 2;
  margin-top: clamp(20px, 3vw, 34px);
  padding: clamp(30px, 5vw, 60px) clamp(24px, 5vw, 64px);
  border-radius: 22px;
  background: var(--navy);
  color: #ffffff;
}
.fr-quote__mark {
  display: block;
  font-size: clamp(3rem, 6vw, 4.6rem);
  line-height: 0.6;
  color: var(--accent);
  margin-bottom: 6px;
}
.fr-quote__text {
  font-size: clamp(1.35rem, 3vw, 2.25rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.28;
  max-width: 34ch;
}

/* Stages ladder */
.fr-stages {
  grid-column: 1 / -1;
  grid-row: 3;
  padding-top: clamp(48px, 7vw, 92px);
}
.fr-stages__h {
  font-size: clamp(1.5rem, 3.2vw, 2.3rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.12;
  max-width: 20ch;
}
.fr-ladder {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(12px, 1.6vw, 20px);
  align-items: end;
  margin-top: clamp(40px, 6vw, 68px);
}
.fr-step {
  position: relative;
  padding: 18px 16px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--card);
}
.fr-step--1 { margin-bottom: 0; }
.fr-step--2 { margin-bottom: clamp(18px, 3vw, 34px); }
.fr-step--3 { margin-bottom: clamp(36px, 6vw, 68px); }
.fr-step--4 { margin-bottom: clamp(54px, 9vw, 102px); }
.fr-step__n {
  display: block;
  font-family: var(--fr-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin-bottom: 10px;
}
.fr-step__h {
  font-size: clamp(1.02rem, 1.5vw, 1.16rem);
  font-weight: 600;
  letter-spacing: -0.01em;
}
.fr-step__p { margin-top: 6px; color: var(--muted); font-size: 0.9rem; line-height: 1.5; }
.fr-marker {
  position: absolute;
  bottom: calc(100% + 10px);
  left: 0;
  transform: translateX(-50%);
  white-space: nowrap;
  font-family: var(--fr-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(var(--accent-rgb), 0.4);
  border-radius: 999px;
  padding: 5px 10px;
}

/* Footer: closing, keep reading, end mark CTA */
.fr-foot {
  grid-column: 2;
  grid-row: 4;
  padding-top: clamp(48px, 7vw, 92px);
}
.fr-close {
  font-size: clamp(1.05rem, 1.4vw, 1.16rem);
  line-height: 1.62;
  color: var(--muted);
  max-width: 56ch;
  padding-bottom: clamp(28px, 4vw, 46px);
  border-bottom: 1px solid var(--border);
}
.fr-keep { padding-top: clamp(24px, 3vw, 36px); }
.fr-keep__k {
  font-family: var(--fr-mono);
  font-size: 0.66rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}
.fr-keep__list { display: flex; flex-wrap: wrap; gap: 10px; }
.fr-keep__list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--ink);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: border-color 0.22s ease, background 0.22s ease;
}
.fr-keep__list a:hover,
.fr-keep__list a:focus-visible {
  border-color: var(--accent);
  background: var(--accent-soft);
}
.fr-end {
  margin-top: clamp(36px, 5vw, 64px);
  text-align: center;
}
.fr-end__mark {
  display: block;
  width: 12px;
  height: 12px;
  margin: 0 auto 16px;
  border-radius: 2px;
  background: var(--accent);
}
.fr-end__p {
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  color: var(--ink);
  letter-spacing: -0.01em;
}
.fr-end__link {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 2px;
}
.fr-end__link:hover,
.fr-end__link:focus-visible { color: var(--ink); }

/* Responsive: reflow rail to a pinned horizontal strip */
@media (max-width: 940px) {
  .fr-page { grid-template-columns: 1fr; column-gap: 0; }
  .fr-rail,
  .fr-doc,
  .fr-quote,
  .fr-stages,
  .fr-foot { grid-column: 1 / -1; grid-row: auto; }
  .fr-rail {
    position: sticky;
    top: 84px;
    z-index: 6;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    margin-inline: calc(-1 * var(--fr-gutter));
    padding: 8px var(--fr-gutter);
  }
  .fr-rail__inner { position: static; }
  .fr-rail__list {
    flex-direction: row;
    gap: 0;
    justify-content: space-between;
  }
  .fr-rail__list::before,
  .fr-rail__line { display: none; }
  .fr-rail__link {
    flex-direction: column;
    gap: 6px;
    min-width: 44px;
    justify-content: center;
    padding: 4px 0;
  }
  .fr-rail__bar {
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;
    height: 3px;
    background: var(--border);
  }
  .fr-rail__barfill {
    display: block;
    height: 100%;
    width: calc(var(--fr-progress) * 100%);
    background: var(--accent);
    transition: width 0.18s linear;
  }
  .fr-chapter { grid-template-columns: 1fr; gap: 18px; }
  .fr-note { padding-top: 0; border-top: 1px solid var(--border); padding-block: 14px 0; }
  .fr-quote__text { max-width: none; }
}

@media (max-width: 720px) {
  .fr-ladder {
    grid-template-columns: 1fr;
    align-items: start;
    gap: 12px;
    margin-top: 26px;
  }
  .fr-step { margin-bottom: 0 !important; }
  .fr-marker {
    position: static;
    transform: none;
    display: inline-flex;
    margin-bottom: 8px;
  }
  .fr-stages { padding-top: clamp(38px, 8vw, 60px); }
}

@media (max-width: 460px) {
  .pg-insights-readiness { padding-top: 88px; }
  .fr-top__mid { padding-left: 10px; }
  .fr-chapter__num { font-size: 4.6rem; }
}

@media (prefers-reduced-motion: reduce) {
  :where(.pg-insights-readiness) *,
  :where(.pg-insights-readiness) *::before,
  :where(.pg-insights-readiness) *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}