:root {
  --paper: #fbfaf7;
  --paper-2: #ffffff;
  --pale-blue: #eef5f8;
  --pale-aqua: #f2f8f7;
  --ink: #0d2036;
  --ink-2: #34475a;
  --muted: #68788a;
  --line: #d7e0e7;
  --orange: #bf5b32;
  --orange-dark: #9f4727;
  --blue: #1c6b8f;
  --aqua: #4da7aa;
  --gold: #d5903e;
  --navy: #0c1f35;
  --navy-2: #132a44;
  --white: #ffffff;
  --header-h: 58px;
  --footer-h: 42px;
  --shell: min(78vw, 1120px);
  --radius: 14px;
  --shadow: 0 16px 44px rgba(13, 32, 54, 0.10);
  --accent-w: 3px;
  --accent-gap: 17px;
  --form-control-width: 76%;
  --hero-book-width: 390px;
}

* { box-sizing: border-box; }
html { height: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  height: 100%;
  min-height: 100dvh;
  overflow: hidden;
  display: grid;
  grid-template-rows: var(--header-h) minmax(0, 1fr) var(--footer-h);
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 14px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; }
button, input, select, textarea { font: inherit; }
button { color: inherit; }

.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 1000;
  background: var(--white);
  color: var(--navy);
  padding: 0.55rem 0.7rem;
  border-radius: 8px;
}
.skip-link:focus { top: 8px; }

.shell { width: var(--shell); margin-inline: auto; }

.site-header {
  position: relative;
  z-index: 300;
  height: var(--header-h);
  background: var(--navy);
  color: var(--white);
  border-bottom: 1px solid rgba(255,255,255,0.11);
  box-shadow: 0 5px 18px rgba(4, 15, 27, 0.11);
}
.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.header-branding { display: flex; align-items: center; gap: 13px; min-width: 0; }
.brand {
  color: var(--white);
  font-size: 0.69rem;
  font-weight: 820;
  letter-spacing: 0.14em;
  text-decoration: none;
  white-space: nowrap;
}
.brand:hover, .brand:focus-visible { color: #f5c28c; }
.header-utility {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: rgba(255,255,255,0.78);
  font-size: 0.66rem;
  font-weight: 700;
  text-decoration: none;
}
.header-utility:hover, .header-utility:focus-visible { color: var(--white); }

.menu-wrap { position: relative; }
.menu-trigger {
  width: 42px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: 999px;
  background: rgba(255,255,255,0.04);
  cursor: pointer;
  transition: background 150ms ease, border-color 150ms ease;
}
.menu-trigger:hover,
.menu-trigger:focus-visible,
.menu-trigger[aria-expanded="true"] {
  background: rgba(255,255,255,0.09);
  border-color: rgba(255,255,255,0.30);
  outline: none;
}
.menu-dots { display: flex; align-items: center; gap: 5px; }
.menu-dot { width: 7px; height: 7px; border-radius: 50%; display: block; }
.menu-dot:nth-child(1) { background: var(--orange); }
.menu-dot:nth-child(2) { background: var(--blue); }
.menu-dot:nth-child(3) { background: var(--gold); }

.menu-layer {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  width: min(320px, 82vw);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 14px;
  background: var(--navy);
  color: var(--white);
  box-shadow: 0 20px 60px rgba(4,15,27,0.30);
  overflow: hidden;
}
.menu-layer[hidden] { display: none; }
.menu-head {
  padding: 14px 16px 11px;
  border-bottom: 1px solid rgba(255,255,255,0.11);
  color: rgba(255,255,255,0.58);
  font-size: 0.58rem;
  font-weight: 850;
  letter-spacing: 0.15em;
}
.menu-links { display: grid; padding: 7px; }
.menu-links a {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 8px;
  align-items: center;
  padding: 10px 10px;
  border-radius: 9px;
  color: rgba(255,255,255,0.90);
  text-decoration: none;
  font-size: 0.76rem;
  font-weight: 720;
}
.menu-links a:hover, .menu-links a:focus-visible {
  background: rgba(255,255,255,0.07);
  color: var(--white);
  outline: none;
}
.menu-num { color: #efb16f; font-size: 0.56rem; font-weight: 850; letter-spacing: 0.06em; }
.menu-foot {
  padding: 11px 16px 13px;
  border-top: 1px solid rgba(255,255,255,0.11);
  color: rgba(255,255,255,0.58);
  font-size: 0.60rem;
}

.site-main {
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior-y: contain;
  scroll-behavior: smooth;
  background: var(--paper);
}

.site-footer {
  position: relative;
  z-index: 250;
  height: var(--footer-h);
  background: var(--navy);
  color: rgba(255,255,255,0.72);
  border-top: 1px solid rgba(255,255,255,0.11);
}
.footer-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.footer-copy { font-size: 0.61rem; white-space: nowrap; }
.footer-links { display: flex; align-items: center; gap: 14px; }
.footer-links a { color: rgba(255,255,255,0.72); font-size: 0.61rem; text-decoration: none; font-weight: 650; }
.footer-links a:hover, .footer-links a:focus-visible { color: var(--white); }

.page-hero, .section { padding: clamp(34px, 5vw, 74px) 0; }
.page-hero { background: var(--paper); }
.section-light { background: var(--paper-2); }
.section-blue { background: var(--pale-blue); border-block: 1px solid rgba(28,107,143,0.07); }
.section-aqua { background: var(--pale-aqua); border-block: 1px solid rgba(77,167,170,0.07); }
.section-compact { padding-block: clamp(24px, 3vw, 42px); }

.accent-frame, .section-frame {
  border-left: var(--accent-w) solid var(--section-accent, var(--orange));
  padding-left: var(--accent-gap);
}
.accent-orange { --section-accent: var(--orange); }
.accent-blue { --section-accent: var(--blue); }
.accent-aqua { --section-accent: var(--aqua); }
.accent-gold { --section-accent: var(--gold); }

.eyebrow, .card-kicker {
  margin: 0 0 0.55rem;
  color: var(--orange-dark);
  font-size: 0.60rem;
  font-weight: 860;
  letter-spacing: 0.15em;
}
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { letter-spacing: -0.018em; }
h1 {
  max-width: 760px;
  margin-bottom: 0.75rem;
  font-size: clamp(2rem, 4vw, 3.8rem);
  line-height: 0.96;
  font-weight: 790;
}
h2 {
  max-width: 780px;
  margin-bottom: 0.7rem;
  font-size: clamp(1.55rem, 2.6vw, 2.55rem);
  line-height: 1.02;
  font-weight: 760;
}
h3 { margin-bottom: 0.38rem; font-size: 1rem; line-height: 1.15; }
p { margin-bottom: 0.85rem; }
.lede, .section-intro, .large-copy {
  max-width: 780px;
  color: var(--ink-2);
  font-size: clamp(0.96rem, 1.15vw, 1.09rem);
  line-height: 1.55;
}
.lede { max-width: 690px; }
.small-copy { color: var(--muted); font-size: 0.78rem; }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.14fr) minmax(280px, 0.86fr);
  gap: clamp(30px, 5vw, 72px);
  align-items: center;
}
.hero-copy { min-width: 0; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 1.2rem; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  border: 1px solid var(--navy);
  border-radius: 999px;
  background: var(--navy);
  color: var(--white);
  padding: 0.62rem 1rem;
  font-size: 0.74rem;
  font-weight: 770;
  text-decoration: none;
  cursor: pointer;
  transition: transform 150ms ease, background 150ms ease, border-color 150ms ease;
}
.button:hover, .button:focus-visible { background: var(--navy-2); border-color: var(--navy-2); transform: translateY(-1px); outline: none; }
.button-secondary { background: transparent; color: var(--navy); }
.button-secondary:hover, .button-secondary:focus-visible { background: rgba(12,31,53,0.05); color: var(--navy); }
.button-disabled { opacity: 0.56; cursor: default; pointer-events: none; }
.text-link { color: var(--navy); font-size: 0.78rem; font-weight: 760; text-underline-offset: 0.2em; }
.text-link:hover { color: var(--orange-dark); }

.split, .signup-grid, .contact-grid, .press-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: start;
}

.feature-list { border-top: 1px solid var(--line); }
.feature {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.feature p { margin-bottom: 0; color: var(--ink-2); font-size: 0.86rem; line-height: 1.42; }
.feature-number { color: var(--orange-dark); font-size: 0.62rem; font-weight: 860; letter-spacing: 0.09em; padding-top: 2px; }

.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 1.35rem; }
.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.75);
  padding: 19px;
  box-shadow: 0 8px 24px rgba(13,32,54,0.04);
}
.card p { margin-bottom: 0; color: var(--ink-2); font-size: 0.84rem; line-height: 1.45; }
.card-kicker { margin-bottom: 0.45rem; }

.signup-card, .contact-card {
  width: var(--form-control-width);
  justify-self: start;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.92);
  padding: clamp(20px, 2.6vw, 30px);
  box-shadow: var(--shadow);
}
.signup-form, .contact-form { display: grid; gap: 8px; }
.signup-form label, .contact-form label { margin-top: 4px; color: var(--ink-2); font-size: 0.70rem; font-weight: 780; }
input, select, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  color: var(--ink);
  padding: 0.66rem 0.72rem;
  outline: none;
  transition: border-color 150ms ease, box-shadow 150ms ease;
}
input:focus, select:focus, textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(28,107,143,0.09); }
textarea { resize: vertical; min-height: 120px; }
.signup-form input, .signup-form .button, .contact-form input, .contact-form select, .contact-form textarea, .contact-form .button { width: 100%; justify-self: start; }
.form-note { width: 100%; margin: 0.2rem 0 0; color: var(--muted); font-size: 0.66rem; line-height: 1.4; }
.turnstile-row { width: 100%; margin: 0.38rem 0 0.12rem; overflow: hidden; }
.turnstile-row .cf-turnstile { width: 100%; }

.book-stage { width: min(100%, var(--hero-book-width)); margin-inline: auto; }
.book-render { margin: 0; width: 100%; }
.book-render img {
  width: min(280px, 78vw);
  height: auto;
  margin-inline: auto;
  object-fit: contain;
  border-radius: 4px 10px 10px 4px;
  box-shadow: 18px 18px 42px rgba(13,32,54,0.20);
  transform: perspective(900px) rotateY(-6deg) rotateX(1deg);
  transform-origin: 50% 50%;
}
.book-fallback {
  position: relative;
  width: min(270px, 78vw);
  aspect-ratio: 0.67;
  margin-inline: auto;
  border-radius: 5px 11px 11px 5px;
  background: linear-gradient(145deg, #122b43, #0c1f35 62%, #071523);
  color: var(--white);
  box-shadow: 18px 18px 42px rgba(13,32,54,0.20);
  transform: perspective(900px) rotateY(-7deg) rotateX(2deg);
  overflow: hidden;
}
.book-fallback::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 13px; background: rgba(255,255,255,0.07); }
.book-fallback::after { content: ""; position: absolute; width: 150%; height: 1px; background: rgba(255,255,255,0.09); left: -20%; top: 64%; transform: rotate(-22deg); }
.book-fallback-inner { position: absolute; inset: 11% 10% 9% 14%; display: flex; flex-direction: column; }
.book-series { color: #efb16f; font-size: 0.54rem; font-weight: 850; letter-spacing: 0.14em; }
.book-title { margin-top: 14%; font-size: clamp(1.7rem, 4vw, 2.5rem); line-height: 0.9; font-weight: 790; letter-spacing: -0.04em; }
.book-subtitle { margin-top: 8%; color: rgba(255,255,255,0.72); font-size: 0.72rem; line-height: 1.35; }
.book-author { margin-top: auto; font-size: 0.67rem; font-weight: 750; letter-spacing: 0.08em; }
.book-dots { display:flex; gap:5px; margin-top: 12px; }
.book-dots span { width: 7px; height:7px; border-radius:50%; }
.book-dots span:nth-child(1){background:var(--orange)} .book-dots span:nth-child(2){background:var(--blue)} .book-dots span:nth-child(3){background:var(--gold)}

.guide-visual {
  width: min(340px, 90%);
  margin-inline: auto;
  border: 1px solid #cbd8df;
  border-radius: 12px;
  background: white;
  box-shadow: var(--shadow);
  padding: 18px;
}
.guide-tabs { display: grid; grid-template-columns: repeat(5,1fr); gap: 5px; margin-bottom: 18px; }
.guide-tabs span { border-radius: 999px; background: #e7f0f4; color: var(--blue); text-align:center; padding: 5px 2px; font-size: 0.46rem; font-weight: 830; letter-spacing: 0.05em; }
.guide-tabs span:first-child { background: var(--navy); color:white; }
.guide-line { height: 7px; border-radius: 999px; background: #dce8ed; margin-bottom: 9px; }
.guide-line.short { width: 64%; } .guide-line.mid { width: 82%; } .guide-line.orange { background: #efddd5; width: 48%; }
.guide-box { border: 1px solid #dbe5ea; border-radius: 9px; padding: 12px; margin-top: 14px; }
.guide-row { display:flex; gap:8px; align-items:center; margin: 8px 0; }
.guide-check { width:10px; height:10px; border:1px solid var(--blue); border-radius:2px; }
.guide-row .guide-line { margin:0; flex:1; height:6px; }

.notice {
  border-left: 3px solid var(--blue);
  background: rgba(255,255,255,0.62);
  padding: 13px 15px;
  color: var(--ink-2);
  font-size: 0.82rem;
  line-height: 1.48;
}
.badge { display: inline-flex; align-items:center; gap:6px; border:1px solid var(--line); border-radius:999px; background:white; padding:6px 9px; color:var(--ink-2); font-size:0.66rem; font-weight:760; }
.badge-dot { width:6px;height:6px;border-radius:50%;background:var(--aqua); }

.contact-list { display:grid; gap: 10px; margin-top: 1rem; }
.contact-row { display:grid; grid-template-columns: 110px 1fr; gap: 14px; border-top:1px solid var(--line); padding-top:10px; }
.contact-row strong { color: var(--ink); font-size: 0.72rem; }
.contact-row a { color: var(--blue); font-weight: 730; text-decoration-thickness: 1px; text-underline-offset: 0.16em; }

.prose { max-width: 820px; }
.prose h2 { margin-top: 1.7rem; font-size: 1.25rem; }
.prose h3 { margin-top: 1.25rem; }
.prose p, .prose li { color: var(--ink-2); font-size: 0.90rem; line-height: 1.58; }
.prose ul { padding-left: 1.15rem; }

.status-block { display:flex; flex-wrap:wrap; gap:8px; margin-top:1.1rem; }

@media (max-width: 1120px) { :root { --shell: min(88vw, 980px); } }
@media (max-width: 860px) {
  :root { --shell: min(90vw, 760px); --form-control-width: 100%; }
  .hero-grid, .split, .signup-grid, .contact-grid, .press-grid { grid-template-columns: 1fr; }
  .hero-grid { gap: 34px; }
  .book-stage { margin-inline: 0; width: min(330px, 80vw); }
  .guide-visual { margin-inline: 0; }
  .card-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  :root { --shell: min(92vw, 600px); --header-h: 54px; --footer-h: 44px; --accent-gap: 13px; }
  body { font-size: 13.5px; }
  .header-inner { gap: 10px; }
  .brand { font-size: 0.62rem; letter-spacing: 0.11em; }
  .header-utility { display: none; }
  .menu-trigger { width: 39px; height: 32px; }
  .menu-layer { position: fixed; top: calc(var(--header-h) - 1px); left: 4vw; right: 4vw; width: auto; max-height: calc(100dvh - var(--header-h) - var(--footer-h) - 12px); overflow-y: auto; }
  .page-hero, .section { padding: 34px 0; }
  h1 { font-size: clamp(1.85rem, 10vw, 2.8rem); }
  h2 { font-size: clamp(1.4rem, 7.2vw, 2rem); }
  .footer-copy { font-size: 0.56rem; }
  .footer-links { gap: 10px; }
  .footer-links a { font-size: 0.56rem; }
  .contact-row { grid-template-columns: 1fr; gap: 3px; }
}
@media (max-width: 390px) {
  .footer-inner { gap: 8px; }
  .footer-copy, .footer-links a { font-size: 0.52rem; }
  .footer-links { gap: 7px; }
  .brand { font-size: 0.58rem; }
}
@media (max-width: 520px) {
  .guide-cycle-grid { grid-template-columns: 1fr; }
}

/* Production-readiness additions */
.menu-links a[aria-current="page"] {
  background: rgba(255,255,255,0.09);
  color: var(--white);
}
.menu-links a[aria-current="page"] .menu-num { color: #ffd09d; }

.form-trap {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
}
.form-status {
  width: var(--form-control-width);
  min-height: 1.1em;
  margin: 0.35rem 0 0;
  font-size: 0.69rem;
  line-height: 1.4;
  color: var(--muted);
}
.form-status.is-success { color: #2a6948; }
.form-status.is-error { color: #9f4727; }
button:disabled { opacity: 0.62; cursor: wait; transform: none !important; }

.utility-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 1.2rem; }
.error-code {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--white);
  color: var(--muted);
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

@media (max-width: 860px) {
  .form-status { width: 100%; }
}


/* REVIEW BUILD ONLY: lemonchiffon marks copy that is temporary, provisional, or dependent on launch plumbing. */
.review-placeholder-inline {
  background: lemonchiffon !important;
  color: var(--ink) !important;
  box-shadow: 0 0 0 3px lemonchiffon;
  border-color: #e4d68c !important;
  border-radius: 3px;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}
.review-placeholder-block {
  background: lemonchiffon;
  border-left: 3px solid #d8bd4a;
  border-radius: 6px;
  padding: 10px 12px;
}
.review-backend-pending {
  background: lemonchiffon;
  border-color: #e4d68c;
}
.review-backend-label {
  display: inline-flex;
  margin: 0 0 .55rem;
  border-radius: 999px;
  background: #fff1a8;
  color: #695600;
  padding: .30rem .52rem;
  font-size: .54rem;
  font-weight: 860;
  letter-spacing: .10em;
}
.press-wordmark {
  margin-bottom: .24rem;
  font-size: clamp(2.15rem, 5vw, 4.65rem);
  line-height: .9;
  letter-spacing: .055em;
  font-weight: 850;
}
.press-tagline {
  margin-bottom: .72rem;
  color: var(--ink-2);
  font-size: clamp(1.05rem, 1.7vw, 1.42rem);
  font-weight: 720;
  line-height: 1.08;
}
.callout-stack {
  display: grid;
  gap: 20px;
}
.callout-panel {
  border-left: 3px solid var(--callout-accent);
  border-radius: 0 10px 10px 0;
  background: var(--paper);
  padding: clamp(16px, 2vw, 24px);
  box-shadow: 0 8px 24px rgba(13, 32, 54, 0.045);
}
.callout-panel .section-intro:last-child { margin-bottom: 0; }
.callout-orange { --callout-accent: var(--orange); }
.callout-blue { --callout-accent: var(--blue); }
.contact-cta { align-self: start; }
.obfuscated-email { color: var(--blue); font-weight: 730; text-underline-offset: .16em; }


/* Evaluation v4 refinements */
.series-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(310px, .85fr);
  gap: clamp(34px, 5vw, 76px);
  align-items: center;
}
.series-framework {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,.72);
  padding: clamp(20px, 2.6vw, 30px);
  box-shadow: var(--shadow);
}
.framework-row {
  display: grid;
  grid-template-columns: 12px minmax(125px, .7fr) 1.3fr;
  gap: 12px;
  align-items: start;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}
.framework-row:first-of-type { margin-top: 8px; }
.framework-row strong { font-size: .82rem; color: var(--ink); }
.framework-row span:last-child { color: var(--ink-2); font-size: .80rem; line-height: 1.42; }
.framework-dot, .concept-mark, .process-mark, .principle-mark { width: 9px; height: 9px; border-radius: 50%; display: inline-block; margin-top: 4px; flex: 0 0 auto; }
.dot-orange, .mark-orange { background: var(--orange); }
.dot-blue, .mark-blue { background: var(--blue); }
.dot-gold, .mark-gold { background: var(--gold); }
.dot-aqua, .mark-aqua { background: var(--aqua); }
.book-feature-grid {
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(420px, 1.05fr);
  gap: clamp(30px, 5vw, 72px);
  align-items: center;
}
.book-one-flag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  border-radius: 999px;
  background: var(--navy);
  color: var(--white);
  padding: 8px 12px;
  font-size: .62rem;
  font-weight: 850;
  letter-spacing: .095em;
}
.flag-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--orange); }
.central-idea-card {
  margin-top: 18px;
  border-left: 3px solid var(--orange);
  border-radius: 0 10px 10px 0;
  background: rgba(255,255,255,.62);
  padding: 16px 18px;
}
.central-idea-card p:last-child { margin-bottom: 0; color: var(--ink-2); }
.book-mockup-stage {
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.book-mockup-stage img {
  display: block;
  width: auto;
  height: 420px;
  max-width: 100%;
  object-fit: contain;
  mix-blend-mode: multiply;
}
.book-page-mockup img { height: 420px; }
.concept-stack { border-top: 1px solid var(--line); }
.concept-item {
  display: grid;
  grid-template-columns: 16px 1fr;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.concept-item p { margin-bottom: 0; color: var(--ink-2); font-size: .86rem; line-height: 1.42; }
.concept-grid, .principle-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 1.4rem;
}
.concept-card, .principle-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,.76);
  padding: 20px;
  box-shadow: 0 8px 24px rgba(13,32,54,.04);
}
.concept-card .concept-mark, .principle-card .principle-mark { margin: 0 0 14px; }
.concept-card p, .principle-card p { margin-bottom: 0; color: var(--ink-2); font-size: .84rem; line-height: 1.45; }
.concept-orange, .principle-orange { border-top: 3px solid var(--orange); }
.concept-blue, .principle-blue { border-top: 3px solid var(--blue); }
.concept-gold, .principle-gold { border-top: 3px solid var(--gold); }
.principle-orange .principle-mark { background: var(--orange); }
.principle-blue .principle-mark { background: var(--blue); }
.principle-gold .principle-mark { background: var(--gold); }
.process-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 28px minmax(0, 1fr) 28px minmax(0, 1fr) 28px minmax(0, 1fr);
  gap: 12px;
  align-items: stretch;
  margin-top: 1.5rem;
}
.process-step {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,.78);
  padding: 20px;
  min-height: 190px;
}
.process-step .process-mark { margin: 0 0 12px; }
.process-label { margin: 0 0 .45rem; color: var(--orange-dark); font-size: .60rem; font-weight: 860; letter-spacing: .15em; }
.process-step p:last-child { margin-bottom: 0; color: var(--ink-2); font-size: .84rem; line-height: 1.45; }
.process-arrow { display: flex; align-items: center; justify-content: center; color: var(--blue); font-size: 1.4rem; font-weight: 800; }
.section-tech-note { background: #fff4e9; border-block: 1px solid rgba(191,91,50,.10); }
.section-medical-note { background: #eaf4f8; border-block: 1px solid rgba(28,107,143,.10); }
.compact-cards .card { min-height: 118px; padding: 16px; }
.guide-cycle-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.subscription-kicker { font-size: .70rem; letter-spacing: .13em; margin-bottom: .65rem; }
.book-title-row { display: flex; align-items: flex-start; flex-wrap: wrap; gap: 12px 16px; }
.book-title-row h1 { margin-bottom: .75rem; }
.badge-coming-soon { background: var(--white); color: var(--ink-2); }
.book-title-row .badge-coming-soon { margin-top: .48rem; }
.book-page-author { margin: -0.2rem 0 1rem; color: var(--ink-2); font-size: 0.78rem; font-weight: 780; letter-spacing: 0.045em; }

@media (max-width: 980px) {
  .series-hero-grid, .book-feature-grid { grid-template-columns: 1fr; }
  .book-feature-grid .book-mockup-stage { order: -1; }
  .book-mockup-stage { min-height: 320px; justify-content: flex-start; }
  .book-mockup-stage img, .book-page-mockup img { height: 320px; }
}
@media (max-width: 860px) {
  .signup-card, .contact-card { width: 100%; }
  .concept-grid, .principle-grid { grid-template-columns: 1fr; }
  .guide-cycle-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .process-flow { grid-template-columns: 1fr; }
  .process-arrow { transform: rotate(90deg); min-height: 20px; }
  .process-step { min-height: 0; }
  .framework-row { grid-template-columns: 12px 1fr; }
  .framework-row span:last-child { grid-column: 2; }
}
@media (max-width: 640px) {
  .book-one-flag { font-size: .56rem; letter-spacing: .075em; }
  .book-mockup-stage { min-height: 260px; }
  .book-mockup-stage img, .book-page-mockup img { height: 260px; }
}

/* v11 subscription preferences */
.subscription-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, .72fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: start;
}
.subscription-card {
  width: min(100%, 520px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,.92);
  padding: clamp(20px, 2.6vw, 30px);
  box-shadow: var(--shadow);
}
.subscription-email {
  margin-bottom: .55rem;
  color: var(--muted);
  font-size: .78rem;
  font-weight: 700;
}
.subscription-status-copy {
  margin-bottom: .8rem;
  color: var(--ink-2);
  line-height: 1.55;
}
.subscription-actions { margin-top: 1rem; }
.subscription-actions .button[hidden] { display: none; }
@media (max-width: 860px) {
  .subscription-layout { grid-template-columns: 1fr; }
  .subscription-card { width: 100%; }
}