/* =====================================================================
   The Last-Mile Operator's Playbook: launch site
   Palette derived from the book cover:
     navy   #0E2034  (cover background)
     amber  #F2B705  (cover rule + truck)
     steel  #9AA7B5  (cover subtitle gray)
   System fonts only. Fully functional offline / JS-disabled.
   ===================================================================== */

:root {
  --navy:       oklch(0.245 0.045 252);   /* #0e2034 */
  --navy-deep:  oklch(0.205 0.042 252);   /* darker band */
  --navy-raise: oklch(0.30 0.05 252);     /* raised surface on navy */
  --navy-line:  oklch(0.38 0.05 252);     /* hairlines on navy */
  --accent:     oklch(0.811 0.166 85);    /* #f2b705 hi-vis amber */
  --accent-deep:oklch(0.518 0.106 77);    /* #8a5f06, for accent TEXT on paper:
                                             the bright amber is 2.1:1 on white and
                                             unreadable. 5.2:1. (The orange it replaced
                                             was 3.9:1 and already failed AA.) */
  --paper:      oklch(0.965 0.006 252);   /* cool off-white, tinted to navy hue */
  --paper-line: oklch(0.86 0.015 252);
  --ink:        oklch(0.26 0.04 252);     /* body ink on paper */
  --ink-soft:   oklch(0.42 0.035 252);
  --steel:      oklch(0.82 0.02 252);     /* light body text on navy */
  --steel-dim:  oklch(0.72 0.025 252);

  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --serif: Charter, "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;

  --measure: 68ch;
  --gutter: clamp(1.25rem, 4vw, 3rem);

  /* z-scale */
  --z-sticky: 10;
}

*, *::before, *::after { box-sizing: border-box; }

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--navy);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--sans);
  line-height: 1.08;
  letter-spacing: -0.015em;
  text-wrap: balance;
  margin: 0 0 1rem;
}

p { margin: 0 0 1rem; }
.prose { max-width: var(--measure); text-wrap: pretty; }

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

a { color: var(--accent-deep); }
a:hover { color: var(--accent); }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--accent);
  color: var(--navy);
  padding: 0.6rem 1rem;
  font-family: var(--sans);
  font-weight: 700;
}
.skip-link:focus { left: 0; }

/* ---------- shared bits ---------- */

.section-inner {
  max-width: 72rem;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.rule {
  width: 4.5rem;
  height: 5px;
  background: var(--accent);
  margin: 0 0 1.5rem;
}

.btn {
  display: inline-block;
  font-family: var(--sans);
  font-weight: 800;
  text-decoration: none;
  text-align: center;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color 160ms cubic-bezier(0.16, 1, 0.3, 1),
              color 160ms cubic-bezier(0.16, 1, 0.3, 1),
              transform 160ms cubic-bezier(0.16, 1, 0.3, 1);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--accent);
  color: var(--navy);
  padding: 0.9rem 1.9rem;
  font-size: 1.05rem;
}
.btn-primary:hover { background: oklch(0.861 0.159 86); color: var(--navy); }

.btn-ghost {
  background: transparent;
  color: var(--paper);
  border-color: var(--navy-line);
  padding: 0.9rem 1.9rem;
  font-size: 1.05rem;
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.btn-small {
  background: var(--accent);
  color: var(--navy);
  padding: 0.45rem 1rem;
  font-size: 0.9rem;
}
.btn-small:hover { background: oklch(0.861 0.159 86); color: var(--navy); }

.btn-big { font-size: 1.2rem; padding: 1.1rem 2.6rem; }

/* ---------- topbar ---------- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem var(--gutter);
  background: var(--navy-deep);
  border-bottom: 1px solid var(--navy-line);
}

.topbar-title {
  margin: 0;
  font-family: var(--sans);
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  color: var(--paper);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  min-width: 0;
}

.topbar-mark {
  flex: none;
  width: 1.5rem;
  height: 5px;
  background: var(--accent);
}

/* ---------- hero ---------- */

.hero {
  background: var(--navy);
  color: var(--paper);
  overflow: hidden;
}

.hero-inner {
  max-width: 72rem;
  margin-inline: auto;
  padding: clamp(3rem, 8vh, 6rem) var(--gutter) clamp(3.5rem, 9vh, 6.5rem);
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}

.hero-kicker {
  font-family: var(--sans);
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1.4rem;
}

.hero h1 {
  font-size: clamp(2rem, 4.6vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
  margin: 0 0 1.4rem;
}
.hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.hero-sub {
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--steel);
  max-width: 34rem;
  margin-bottom: 1.9rem;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 1.8rem;
}

.hero-motto {
  font-family: var(--sans);
  font-size: 0.95rem;
  color: var(--steel-dim);
  border-top: 1px solid var(--navy-line);
  padding-top: 1.1rem;
  max-width: 34rem;
  margin: 0;
}
.hero-motto strong { color: var(--accent); font-weight: 800; }

/* 3D-ish book mockup */
.hero-book {
  display: flex;
  justify-content: center;
  perspective: 1400px;
}

.book {
  position: relative;
  width: min(310px, 72vw);
  transform: rotateY(-14deg) rotateX(2deg);
  transform-style: preserve-3d;
  transition: transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
}
.hero-book:hover .book { transform: rotateY(-8deg) rotateX(1deg); }

.book-cover {
  width: 100%;
  height: auto;
  border-radius: 3px 8px 8px 3px;
  box-shadow:
    0 2px 6px oklch(0 0 0 / 0.45),
    0 24px 48px -12px oklch(0 0 0 / 0.6),
    -6px 0 12px -6px oklch(0 0 0 / 0.5) inset;
}

/* page-block edge */
.book::after {
  content: "";
  position: absolute;
  top: 1.5%;
  bottom: 1.5%;
  right: -9px;
  width: 9px;
  background: repeating-linear-gradient(
    to bottom,
    oklch(0.96 0.005 90) 0 2px,
    oklch(0.85 0.008 90) 2px 3px
  );
  border-radius: 0 3px 3px 0;
  transform: rotateY(-38deg) translateZ(-4px);
  transform-origin: left center;
}

/* spine shadow */
.book::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 12%;
  background: linear-gradient(to right, oklch(0 0 0 / 0.35), transparent);
  border-radius: 3px 0 0 3px;
  pointer-events: none;
  z-index: 1;
}

/* ---------- credibility ---------- */

.cred {
  background: var(--paper);
  padding-block: clamp(3.5rem, 9vh, 6.5rem);
}

.cred-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}

.cred h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  font-weight: 800;
  color: var(--navy);
}

.cred-list {
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--sans);
  font-size: 1rem;
  border-top: 3px solid var(--navy);
}
.cred-list li {
  padding: 0.95rem 0.2rem;
  border-bottom: 1px solid var(--paper-line);
  color: var(--ink-soft);
}
.cred-list li strong { color: var(--navy); font-weight: 800; }

/* ---------- what's inside ---------- */

.inside {
  background: var(--paper);
  border-top: 1px solid var(--paper-line);
  padding-block: clamp(3.5rem, 9vh, 6.5rem);
}

.inside-head { margin-bottom: clamp(2rem, 5vh, 3.5rem); }

.inside h2 {
  display: flex;
  flex-direction: column;
  gap: 0.15em;
  font-size: clamp(1.9rem, 4.2vw, 3.1rem);
  font-weight: 800;
  margin-bottom: 1.4rem;
}
.inside-amateur {
  color: var(--ink-soft);
  text-decoration: line-through;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 0.09em;
}
.inside-operator { color: var(--navy); }

.inside-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: start;
}

.inside-col-title {
  font-size: 1.05rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-deep);
  border-bottom: 3px solid var(--navy);
  padding-bottom: 0.6rem;
  margin-bottom: 0;
}

.ledger {
  list-style: none;
  margin: 0;
  padding: 0;
}
.ledger li {
  padding: 1.05rem 0.2rem;
  border-bottom: 1px solid var(--paper-line);
  color: var(--ink-soft);
  text-wrap: pretty;
}
.ledger li strong { color: var(--navy); }

/* ---------- toolkit ---------- */

.toolkit {
  background: var(--navy);
  color: var(--steel);
  padding-block: clamp(3.5rem, 9vh, 6.5rem);
}

.toolkit h2 {
  font-size: clamp(1.9rem, 3.8vw, 2.8rem);
  font-weight: 800;
  color: #fff;
}
.toolkit-head { margin-bottom: clamp(2rem, 5vh, 3rem); }
.toolkit-head .prose { color: var(--steel); }

.toolkit-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1px;
  background: var(--navy-line);
  border: 1px solid var(--navy-line);
}

.tool {
  background: var(--navy);
  padding: 1.6rem 1.5rem 1.5rem;
  position: relative;
  transition: background-color 200ms cubic-bezier(0.16, 1, 0.3, 1);
}
.tool:hover { background: var(--navy-raise); }

.tool-letter {
  display: inline-block;
  font-family: var(--sans);
  font-weight: 800;
  font-size: 0.95rem;
  line-height: 1;
  color: var(--navy);
  background: var(--accent);
  padding: 0.35rem 0.55rem;
  margin-bottom: 0.9rem;
}

.tool h3 {
  font-size: 1.08rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 0.5rem;
}

.tool p {
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--steel-dim);
  margin: 0;
}

/* ---------- opt-in ---------- */

.optin {
  background: var(--accent);
  color: var(--navy);
  padding-block: clamp(3.5rem, 9vh, 6rem);
}

.optin-grid {
  display: grid;
  grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.optin h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  font-weight: 800;
  color: var(--navy);
}
.optin .prose { color: oklch(0.28 0.05 50); }
.optin .prose strong { color: var(--navy); }

.optin-form label {
  display: block;
  font-family: var(--sans);
  font-weight: 800;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.optin-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.optin-row input[type="email"] {
  flex: 1 1 240px;
  font-family: var(--sans);
  font-size: 1rem;
  padding: 0.85rem 1rem;
  border: 2px solid var(--navy);
  border-radius: 0;
  background: var(--paper);
  color: var(--navy);
  min-width: 0;
}
.optin-row input::placeholder { color: var(--ink-soft); opacity: 1; }

.optin-row .btn-primary {
  background: var(--navy);
  color: var(--paper);
  border: 2px solid var(--navy);
}
.optin-row .btn-primary:hover { background: var(--navy-deep); color: #fff; }

.optin-note {
  font-family: var(--sans);
  font-weight: 800;
  margin: 0.9rem 0 0;
  padding: 0.7rem 1rem;
  background: var(--navy);
  color: var(--paper);
  display: inline-block;
}
.optin-note[hidden] { display: none; }

.optin-fineprint {
  font-size: 0.9rem;
  color: oklch(0.28 0.05 50);
  margin: 0.9rem 0 0;
}

/* ---------- author ---------- */

.author {
  background: var(--paper);
  padding-block: clamp(3.5rem, 9vh, 6rem);
}
.author h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  color: var(--navy);
}
.author-links {
  font-family: var(--sans);
  font-weight: 700;
  display: flex;
  gap: 0.7rem;
  align-items: center;
  margin: 0;
}

/* ---------- closer ---------- */

.closer {
  background: var(--navy-deep);
  color: #fff;
  text-align: center;
  padding-block: clamp(3.5rem, 10vh, 6.5rem);
}
.closer h2 {
  font-size: clamp(1.8rem, 4vw, 2.9rem);
  font-weight: 800;
  margin-bottom: 1.8rem;
}

/* ---------- footer ---------- */

.footer {
  background: var(--navy-deep);
  border-top: 1px solid var(--navy-line);
  color: var(--steel-dim);
  font-family: var(--sans);
  font-size: 0.9rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
  justify-content: space-between;
  padding: 1.4rem var(--gutter);
}
.footer p { margin: 0; }
.footer a { color: var(--steel); }
.footer a:hover { color: var(--accent); }

/* ---------- scroll reveal (progressive enhancement) ----------
   Content is fully visible by default; the .js class (added by script.js)
   opts elements in, and IntersectionObserver reveals them. */

html.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 700ms cubic-bezier(0.16, 1, 0.3, 1),
              transform 700ms cubic-bezier(0.16, 1, 0.3, 1);
}
html.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  html.js [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .btn, .tool, .book { transition: none; }
  .btn:hover { transform: none; }
  .hero-book:hover .book { transform: rotateY(-14deg) rotateX(2deg); }
}

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  .hero-inner {
    grid-template-columns: 1fr;
    padding-top: 2.5rem;
  }
  .hero-book { order: -1; }
  .book { width: min(220px, 60vw); }

  .cred-grid,
  .optin-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  body { font-size: 1rem; }
  .hero-ctas .btn { flex: 1 1 100%; }
  .topbar-title { font-size: 0.85rem; }
}


/* Honeypot: off-screen for people, still in the DOM for bots. Not display:none,
   which some bots skip. */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  clip: rect(0 0 0 0); clip-path: inset(50%);
  overflow: hidden; white-space: nowrap;
}

/* ==========================================================================
   The math (Chapter 3 excerpt)
   ========================================================================== */
.math {
  background: var(--navy);
  color: var(--steel);
  padding-block: clamp(3.5rem, 9vh, 6.5rem);
}
.math h2 {
  font-size: clamp(1.7rem, 3.6vw, 2.6rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: #fff;
  max-width: 22ch;
}
.math-head { margin-bottom: clamp(2rem, 5vh, 3rem); }
.math .prose { color: var(--steel-dim); max-width: var(--measure); }

/* wide tables scroll inside their own box rather than the page */
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--navy-line);
  border-radius: 2px;
  background: var(--navy-deep);
}
.math-table {
  width: 100%;
  min-width: 34rem;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
  font-size: clamp(0.85rem, 1.6vw, 0.98rem);
}
.math-table th,
.math-table td { padding: 0.7rem 1rem; text-align: right; }
.math-table thead th {
  color: #fff;
  font-weight: 700;
  border-bottom: 2px solid var(--navy-line);
  vertical-align: bottom;
}
.math-table thead th span {
  display: block;
  font-weight: 400;
  font-size: 0.8em;
  color: var(--steel-dim);
}
.math-table tbody th,
.math-table thead th:first-child { text-align: left; font-weight: 400; color: var(--steel); }
.math-table tbody tr + tr th,
.math-table tbody tr + tr td { border-top: 1px solid color-mix(in oklch, var(--navy-line) 55%, transparent); }
.math-table .is-subtotal th,
.math-table .is-subtotal td { font-weight: 700; color: #fff; }
.math-table .is-total th,
.math-table .is-total td {
  font-weight: 800;
  color: var(--accent);
  border-top: 2px solid var(--navy-line);
  font-size: 1.08em;
}
.math-kicker {
  margin-top: 1.75rem;
  max-width: var(--measure);
  color: var(--steel);
  font-size: clamp(1rem, 2vw, 1.15rem);
}
.math-kicker strong { color: #fff; }

/* ==========================================================================
   Cash trough calculator
   ========================================================================== */
.calc-sec {
  background: var(--paper);
  border-top: 1px solid var(--paper-line);
  padding-block: clamp(3.5rem, 9vh, 6.5rem);
}
.calc-sec h2 {
  font-size: clamp(1.7rem, 3.6vw, 2.6rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--ink);
  max-width: 20ch;
}
.calc-head { margin-bottom: clamp(2rem, 5vh, 3rem); }
.calc-grid {
  display: grid;
  grid-template-columns: minmax(0, 20rem) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}
@media (max-width: 54rem) { .calc-grid { grid-template-columns: 1fr; } }

.calc-form fieldset { border: 0; padding: 0; margin: 0 0 1.5rem; }
.calc-form legend {
  padding: 0;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 0.75rem;
}
.calc-field { display: flex; flex-direction: column; gap: 0.3rem; margin-bottom: 0.85rem; }
.calc-field label { font-size: 0.88rem; color: var(--ink-soft); }
.calc-field input {
  font: inherit;
  font-variant-numeric: tabular-nums;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--paper-line);
  border-radius: 2px;
  background: #fff;
  color: var(--ink);
  min-height: 44px;                       /* comfortable touch target */
}
.calc-field input:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}

.calc-out {
  background: var(--navy);
  color: var(--steel);
  padding: clamp(1.25rem, 3vw, 2rem);
  border-radius: 2px;
}
.calc-lead { margin: 0 0 1.25rem; color: var(--steel-dim); }
.calc-lead strong { color: #fff; font-variant-numeric: tabular-nums; }
.calc-figures {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9.5rem, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.calc-fig { display: flex; flex-direction: column; gap: 0.15rem; }
.calc-label {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--steel-dim);
}
.calc-value {
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  font-weight: 800;
  color: #fff;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}
.calc-fig.is-headline .calc-value { color: var(--accent); }
.calc-sub { font-size: 0.8rem; color: var(--steel-dim); }

.calc-chart { margin: 0.5rem 0 0.75rem; }
.calc-chart svg { width: 100%; height: clamp(110px, 20vw, 160px); display: block; }
.spark-fill { fill: color-mix(in oklch, var(--accent) 18%, transparent); stroke: none; }
.spark-line { fill: none; stroke: var(--accent); stroke-width: 2.5; stroke-linejoin: round; }
.spark-zero { stroke: var(--navy-line); stroke-width: 1; stroke-dasharray: 4 4; }
.spark-dot { fill: #fff; stroke: var(--accent); stroke-width: 2.5; }

.calc-caption, .calc-fineprint { font-size: 0.82rem; color: var(--steel-dim); margin: 0 0 0.75rem; }
.calc-fineprint { margin-bottom: 0; }
.calc-warning {
  margin: 0 0 0.9rem;
  padding: 0.7rem 0.9rem;
  border-left: 3px solid var(--accent);
  background: var(--navy-raise);
  color: #fff;
  font-size: 0.88rem;
}
.calc-noscript { margin-top: 1.5rem; }

/* ==========================================================================
   Contents
   ========================================================================== */
.toc-sec {
  background: var(--navy-deep);
  color: var(--steel);
  padding-block: clamp(3.5rem, 9vh, 6.5rem);
}
.toc-sec h2 {
  font-size: clamp(1.7rem, 3.6vw, 2.6rem);
  font-weight: 800; letter-spacing: -0.02em; color: #fff;
}
.toc-head { margin-bottom: clamp(1.75rem, 4vh, 2.5rem); }
.toc-sec .prose { color: var(--steel-dim); max-width: var(--measure); }
.toc-list {
  list-style: none;
  margin: 0; padding: 0;
  columns: 2;
  column-gap: clamp(1.5rem, 5vw, 4rem);
}
@media (max-width: 46rem) { .toc-list { columns: 1; } }
.toc-part {
  break-inside: avoid;
  margin: 1.5rem 0 0.6rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--navy-line);
  font-weight: 700;
  color: #fff;
}
.toc-list > .toc-part:first-child { margin-top: 0; border-top: 0; padding-top: 0; }
.toc-part-label {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
}
.toc-chapter {
  break-inside: avoid;
  display: grid;
  grid-template-columns: 2.1rem 1fr;
  gap: 0.4rem;
  padding: 0.3rem 0;
  font-size: 0.94rem;
}
.toc-num { color: var(--steel-dim); font-variant-numeric: tabular-nums; }

/* ==========================================================================
   FAQ
   ========================================================================== */
.faq-sec {
  background: var(--paper);
  border-top: 1px solid var(--paper-line);
  padding-block: clamp(3.5rem, 9vh, 6.5rem);
}
.faq-sec h2 {
  font-size: clamp(1.7rem, 3.6vw, 2.6rem);
  font-weight: 800; letter-spacing: -0.02em; color: var(--ink);
}
.faq-head { margin-bottom: clamp(1.5rem, 4vh, 2.25rem); }
.faq-list { max-width: var(--measure); }
.faq-item { border-bottom: 1px solid var(--paper-line); }
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 1rem 2rem 1rem 0;
  font-weight: 700;
  color: var(--ink);
  position: relative;
  min-height: 44px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute; right: 0.25rem; top: 50%;
  transform: translateY(-50%);
  /* accent-deep, not accent: this marker sits on paper and carries the
     open/closed state, so it needs 3:1 non-text contrast. The bright amber is
     1.65:1 there. */
  font-size: 1.4rem; font-weight: 400; color: var(--accent-deep);
  line-height: 1;
}
.faq-item[open] summary::after { content: "\2013"; }
.faq-item summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.faq-body { padding: 0 0 1.15rem; color: var(--ink-soft); max-width: 62ch; }
.faq-body p { margin: 0; }
.calc-hint {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-deep);
  margin-left: 0.35rem;
}
.calc-cta { display: inline-block; margin-top: 1rem; }
.faq-group {
  margin: 2.25rem 0 0.25rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-deep);
}
.faq-list + .faq-group { margin-top: 2.75rem; }
.faq-note {
  margin-top: 1.75rem;
  max-width: var(--measure);
  font-size: 0.82rem;
  color: var(--ink-soft);
}

/* ==========================================================================
   Bid readiness checker
   ========================================================================== */
.ready-sec {
  background: var(--navy);
  color: var(--steel);
  padding-block: clamp(3.5rem, 9vh, 6.5rem);
}
.ready-sec h2 {
  font-size: clamp(1.7rem, 3.6vw, 2.6rem);
  font-weight: 800; letter-spacing: -0.02em; color: #fff;
  max-width: 18ch;
}
.ready-head { margin-bottom: clamp(1.5rem, 4vh, 2.25rem); }
.ready-sec .prose { color: var(--steel-dim); max-width: var(--measure); }

.ready-scope {
  display: flex; flex-wrap: wrap; align-items: center; gap: 1.25rem;
  padding: 0.9rem 1.1rem;
  background: var(--navy-raise);
  border-radius: 2px;
  margin-bottom: 1.75rem;
}
.ready-scope-label {
  font-size: 0.72rem; letter-spacing: 0.09em; text-transform: uppercase;
  color: var(--steel-dim); font-weight: 700;
}
.ready-scope label { display: flex; align-items: center; gap: 0.5rem; cursor: pointer; }

.ready-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 19rem);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}
@media (max-width: 58rem) { .ready-grid { grid-template-columns: 1fr; } }

.ready-group + .ready-group { margin-top: 1.75rem; }
.ready-group-title {
  font-size: 0.74rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent); font-weight: 700;
  padding-bottom: 0.5rem; margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--navy-line);
}
.ready-items { list-style: none; margin: 0; padding: 0; }
.ready-items li {
  display: grid; grid-template-columns: 1.4rem 1fr; gap: 0.65rem;
  padding: 0.5rem 0;
  align-items: start;
}
.ready-items input[type="checkbox"] {
  width: 1.15rem; height: 1.15rem; margin-top: 0.15rem;
  accent-color: var(--accent); cursor: pointer;
}
.ready-items label { cursor: pointer; display: block; }
.ready-items label strong { display: block; color: #fff; font-weight: 600; font-size: 0.95rem; }
.ready-note { display: block; color: var(--steel-dim); font-size: 0.84rem; margin-top: 0.1rem; }
.ready-items input:focus-visible + label strong { outline: 3px solid var(--accent); outline-offset: 2px; }

.ready-out {
  background: var(--navy-deep);
  border: 1px solid var(--navy-line);
  border-radius: 2px;
  padding: 1.25rem;
  position: sticky; top: 4.5rem;   /* below the section nav */
}
@media (max-width: 58rem) { .ready-out { position: static; } }
.ready-summary { margin: 0 0 0.6rem; font-weight: 700; color: #fff; }
.ready-track {
  height: 8px; background: var(--navy-raise); border-radius: 99px;
  overflow: hidden; margin-bottom: 1rem;
}
.ready-bar { height: 100%; width: 0; background: var(--accent); transition: width 0.25s ease; }
.ready-verdict { margin: 0 0 0.75rem; font-size: 0.9rem; }
.ready-verdict.is-clear { color: #fff; }
.ready-verdict.is-blocked { color: var(--steel); }
.ready-blockers { list-style: none; margin: 0 0 1rem; padding: 0; font-size: 0.86rem; }
.ready-blockers li { padding: 0.3rem 0; border-top: 1px solid var(--navy-line); color: var(--steel-dim); }
.ready-blockers li strong { color: var(--accent); font-weight: 600; }
.ready-blockers .is-more { font-style: italic; }
.ready-fine { margin: 0.9rem 0 0; font-size: 0.8rem; color: var(--steel-dim); }

@media (prefers-reduced-motion: reduce) { .ready-bar { transition: none; } }

/* ==========================================================================
   Glossary
   ========================================================================== */
.gloss-sec {
  background: var(--paper);
  border-top: 1px solid var(--paper-line);
  padding-block: clamp(3.5rem, 9vh, 6.5rem);
}
.gloss-sec h2 {
  font-size: clamp(1.7rem, 3.6vw, 2.6rem);
  font-weight: 800; letter-spacing: -0.02em; color: var(--ink);
}
.gloss-head { margin-bottom: clamp(1.5rem, 4vh, 2.25rem); }
.gloss-sec .prose { color: var(--ink-soft); max-width: var(--measure); }
.gloss-list {
  margin: 0; padding: 0;
  columns: 2;
  column-gap: clamp(1.5rem, 5vw, 3.5rem);
}
@media (max-width: 52rem) { .gloss-list { columns: 1; } }
.gloss-item {
  break-inside: avoid;
  padding: 0.85rem 0;
  border-top: 1px solid var(--paper-line);
}
.gloss-item dt { font-weight: 700; color: var(--ink); margin-bottom: 0.2rem; }
.gloss-item dd { margin: 0; color: var(--ink-soft); font-size: 0.92rem; }

/* ==========================================================================
   Section nav
   ========================================================================== */
.sectionnav {
  /* the topbar scrolls away, so this pins to the very top on its own */
  position: sticky;
  top: 0;
  z-index: calc(var(--z-sticky) - 1);
  background: var(--navy-deep);
  border-bottom: 1px solid var(--navy-line);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.sectionnav::-webkit-scrollbar { display: none; }
.sectionnav ul {
  display: flex;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0 var(--gutter);
  white-space: nowrap;
}
.sectionnav a {
  display: block;
  padding: 0.7rem 0.75rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--steel-dim);
  text-decoration: none;
  border-bottom: 2px solid transparent;
}
.sectionnav a:hover { color: #fff; }
.sectionnav a:focus-visible { outline: 3px solid var(--accent); outline-offset: -3px; }
.sectionnav a.is-current { color: #fff; border-bottom-color: var(--accent); }

/* anchored sections must clear both sticky bars when jumped to */
#the-math, #cash-model, #bid-readiness, #contents, #faq, #glossary, #starter-kit {
  scroll-margin-top: 4rem;   /* clear the sticky section nav on jump */
}
/* focus lands on the section heading after a nav jump; show it, but do not
   draw a ring for mouse users who never see the focus move */
.sectionnav-target:focus { outline: none; }
[id] > .section-inner h2:focus-visible,
h2[tabindex="-1"]:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }