:root {
  --navy: #12253f;
  --navy-deep: #091827;
  --teal: #0b7a75;
  --teal-light: #35a8a0;
  --gold: #d6a84b;
  --gold-soft: #efd9a2;
  --paper: #f7f4ec;
  --white: #ffffff;
  --ink: #172231;
  --slate: #556477;
  --line: #dcd7c9;
  --shadow: 0 28px 70px rgba(9, 24, 39, 0.17);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; }
.shell { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }
.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; left: 16px; top: -60px; z-index: 1000; background: var(--gold); color: var(--navy-deep); padding: 10px 16px; font-weight: 800; transition: top .2s; }
.skip-link:focus { top: 12px; }

.site-header { position: fixed; inset: 0 0 auto; z-index: 100; border-bottom: 1px solid transparent; transition: background .25s, border-color .25s, box-shadow .25s; }
.site-header.scrolled { background: rgba(9,24,39,.95); border-color: rgba(255,255,255,.1); box-shadow: 0 8px 30px rgba(0,0,0,.16); backdrop-filter: blur(12px); }
.header-inner { min-height: 88px; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.brand img { width: 275px; height: auto; }
.primary-nav { display: flex; align-items: center; gap: 34px; }
.primary-nav a { color: #f9fbfd; text-decoration: none; font-size: .91rem; font-weight: 700; letter-spacing: .02em; }
.primary-nav a:hover, .primary-nav a:focus-visible { color: var(--gold-soft); }
.nav-toggle { display: none; background: transparent; border: 0; padding: 8px; }
.nav-toggle span:not(.sr-only) { display: block; width: 25px; height: 2px; background: white; margin: 5px; }

.hero { position: relative; overflow: hidden; min-height: 760px; display: grid; align-items: center; background: radial-gradient(circle at 80% 20%, #1d5061 0, transparent 35%), linear-gradient(145deg, var(--navy-deep), var(--navy) 58%, #163d4c); color: white; }
.hero::after { content: ""; position: absolute; inset: auto 0 0; height: 100px; background: linear-gradient(to bottom right, transparent 49%, var(--paper) 50%); }
.circuit-field { position: absolute; inset: 0; opacity: .13; background-image: linear-gradient(rgba(255,255,255,.2) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.2) 1px, transparent 1px); background-size: 70px 70px; mask-image: radial-gradient(circle at 65% 45%, black, transparent 68%); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.18fr .82fr; gap: 80px; align-items: center; padding: 155px 0 135px; }
.eyebrow { margin: 0 0 18px; color: var(--gold-soft); font-size: .76rem; font-weight: 850; letter-spacing: .16em; text-transform: uppercase; }
.eyebrow.ink { color: var(--teal); }
h1,h2,h3,p { margin-top: 0; }
h1,h2 { font-family: var(--serif); font-weight: 650; letter-spacing: -.035em; line-height: 1.06; }
h1 { margin-bottom: 28px; font-size: clamp(3.1rem, 6.2vw, 6.25rem); }
h1 span { color: var(--gold-soft); }
h2 { font-size: clamp(2.4rem, 4.4vw, 4.6rem); }
.hero-lede { max-width: 670px; color: #dce7ec; font-size: 1.21rem; line-height: 1.75; }
.hero-actions, .book-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; margin-top: 34px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 0 24px; border: 1px solid transparent; border-radius: 3px; text-decoration: none; font-size: .88rem; font-weight: 800; letter-spacing: .015em; transition: transform .2s, background .2s, border-color .2s; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--gold); color: var(--navy-deep); }
.button-primary:hover { background: #e1b85d; }
.button-ghost { border-color: rgba(255,255,255,.32); color: white; }
.button-ghost:hover { border-color: var(--gold-soft); background: rgba(255,255,255,.06); }
.launch-note { display: flex; gap: 10px; align-items: center; margin-top: 32px; color: #b8ccd3; font-size: .85rem; font-weight: 650; }
.launch-note span { width: 7px; height: 7px; border-radius: 50%; background: var(--teal-light); box-shadow: 0 0 0 5px rgba(53,168,160,.15); }
.hero-symbol { position: relative; width: min(410px, 80vw); aspect-ratio: 1; margin-inline: auto; display: grid; place-items: center; }
.hero-symbol img { position: relative; z-index: 2; width: 58%; filter: drop-shadow(0 25px 30px rgba(0,0,0,.24)); }
.symbol-orbit { position: absolute; inset: 5%; border: 1px solid rgba(239,217,162,.34); border-radius: 50%; }
.orbit-two { inset: 18%; border-color: rgba(53,168,160,.35); }
.symbol-orbit::before, .symbol-orbit::after { content: ""; position: absolute; width: 9px; height: 9px; border-radius: 50%; background: var(--gold); }
.symbol-orbit::before { left: 10%; top: 22%; }
.symbol-orbit::after { right: 8%; bottom: 25%; background: var(--teal-light); }
.signal { position: absolute; width: 5px; height: 5px; background: var(--gold-soft); border-radius: 50%; }
.signal-a { top: 8%; right: 32%; }.signal-b { bottom: 18%; left: 8%; }.signal-c { right: 4%; top: 48%; }

.featured { padding: 130px 0; }
.book-grid { display: grid; grid-template-columns: .75fr 1.25fr; gap: clamp(55px, 8vw, 110px); align-items: center; }
.book-visual { position: relative; }
.book-visual img { position: relative; z-index: 2; width: min(390px, 100%); margin-inline: auto; border-radius: 3px 10px 10px 3px; box-shadow: var(--shadow); transform: perspective(1100px) rotateY(7deg); }
.book-visual::after { content: ""; position: absolute; z-index: 3; inset: 0 auto 0 8%; width: 3%; background: linear-gradient(90deg, rgba(0,0,0,.2), transparent); border-radius: 3px; }
.book-glow { position: absolute; width: 90%; aspect-ratio: 1; left: 5%; top: 16%; border-radius: 50%; background: rgba(11,122,117,.15); filter: blur(30px); }
.book-copy h2 { margin-bottom: 35px; color: var(--navy); font-size: clamp(2.6rem, 4.4vw, 4.5rem); }
.book-copy h3 { margin-bottom: 4px; color: var(--navy); font-family: var(--serif); font-size: 1.48rem; }
.subtitle { margin-bottom: 6px; color: var(--slate); font-style: italic; }
.author-line { margin-bottom: 26px; color: var(--teal); font-weight: 800; }
.feature-list { list-style: none; padding: 0; margin: 30px 0; display: grid; grid-template-columns: 1fr 1fr; gap: 12px 26px; }
.feature-list li { display: flex; gap: 12px; align-items: baseline; border-top: 1px solid var(--line); padding-top: 11px; font-size: .9rem; font-weight: 700; }
.feature-list span { color: var(--teal); font-size: .72rem; letter-spacing: .1em; }
.book-meta { display: flex; gap: 50px; padding: 22px 0; border-block: 1px solid var(--line); }
.book-meta div { display: grid; gap: 3px; }
.book-meta span { color: var(--slate); font-size: .7rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.book-meta strong { color: var(--navy); font-family: var(--serif); }
.button-primary.dark { background: var(--navy); color: white; }
.button-primary.dark:hover { background: var(--teal); }
.text-link { color: var(--teal); text-decoration: none; font-weight: 800; font-size: .9rem; }

.principles { padding: 130px 0; background: var(--navy); color: white; }
.section-heading { max-width: 750px; }
.section-heading h2 { margin-bottom: 22px; }
.section-heading > p:last-child { max-width: 630px; color: #c9d6dd; font-size: 1.08rem; }
.principle-grid { display: grid; grid-template-columns: repeat(3,1fr); margin-top: 70px; border: 1px solid rgba(255,255,255,.12); }
.principle-card { position: relative; min-height: 300px; padding: 44px 36px; border-right: 1px solid rgba(255,255,255,.12); }
.principle-card:last-child { border-right: 0; }
.card-number { color: var(--gold-soft); font-size: .76rem; font-weight: 800; letter-spacing: .16em; }
.principle-card h3 { margin: 70px 0 15px; font-family: var(--serif); font-size: 1.62rem; }
.principle-card p { color: #bdccd4; font-size: .95rem; }

.publisher-story { padding: 135px 0; }
.story-grid { display: grid; grid-template-columns: .72fr 1.28fr; align-items: center; gap: 90px; }
.story-mark { display: grid; place-items: center; min-height: 420px; background: linear-gradient(145deg,#0d3444,var(--navy)); border-radius: 50% 50% 6px 50%; }
.story-mark img { width: 54%; }
.story-copy h2 { margin-bottom: 30px; color: var(--navy); }
.story-copy p { font-size: 1.06rem; color: #49596a; }

.instructors { padding: 110px 0; background: linear-gradient(135deg, #096d68, #0b7a75 55%, #125d68); color: white; }
.instructor-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 90px; align-items: center; }
.instructor-copy h2 { margin-bottom: 24px; }
.instructor-copy > p:last-child { color: #d9eeee; font-size: 1.05rem; }
.resource-panel { padding: 36px; background: rgba(3,37,41,.32); border: 1px solid rgba(255,255,255,.18); }
.resource-panel ul { list-style: none; padding: 0; margin: 0 0 28px; display: grid; gap: 14px; }
.resource-panel li { display: flex; gap: 12px; align-items: center; font-weight: 700; }
.resource-panel li span { display: grid; place-items: center; width: 23px; height: 23px; border-radius: 50%; background: var(--gold); color: var(--navy-deep); font-size: .72rem; }
.button-light { background: white; color: var(--navy); }

.contact { padding: 115px 0; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 90px; }
.contact h2 { color: var(--navy); font-size: clamp(2.4rem,4vw,4rem); }
.contact-links { border-top: 1px solid var(--line); }
.contact-links a { display: grid; gap: 3px; padding: 22px 0; border-bottom: 1px solid var(--line); text-decoration: none; }
.contact-links a:hover strong { color: var(--teal); }
.contact-links span { color: var(--slate); font-size: .72rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.contact-links strong { color: var(--navy); font-family: var(--serif); font-size: 1.08rem; transition: color .2s; }

.site-footer { padding: 50px 0; background: var(--navy-deep); color: #b8c7cf; }
.footer-inner { display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 35px; font-size: .76rem; }
.footer-inner img { width: 230px; }
.footer-inner p { margin: 0; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .reveal { opacity: 1; transform: none; transition: none; } }

@media (max-width: 900px) {
  .hero-grid, .book-grid, .story-grid, .instructor-grid, .contact-grid { grid-template-columns: 1fr; }
  .hero-grid { gap: 20px; text-align: center; }
  .hero-copy { display: grid; justify-items: center; }
  .hero-symbol { width: 280px; }
  .book-grid, .story-grid, .instructor-grid, .contact-grid { gap: 55px; }
  .book-visual img { width: 330px; }
  .principle-grid { grid-template-columns: 1fr; }
  .principle-card { border-right: 0; border-bottom: 1px solid rgba(255,255,255,.12); }
  .principle-card:last-child { border-bottom: 0; }
  .footer-inner { grid-template-columns: 1fr; }
  .nav-toggle { display: block; }
  .primary-nav { display: none; position: absolute; inset: 88px 0 auto; padding: 22px 20px 30px; background: var(--navy-deep); flex-direction: column; align-items: flex-start; }
  .primary-nav.open { display: flex; }
}

@media (max-width: 600px) {
  .shell { width: min(100% - 28px, 1160px); }
  .header-inner { min-height: 76px; }
  .brand img { width: 218px; }
  .primary-nav { top: 76px; }
  .hero { min-height: 0; }
  .hero-grid { padding: 125px 0 115px; }
  h1 { font-size: 3.2rem; }
  .hero-symbol { display: none; }
  .featured, .principles, .publisher-story, .instructors, .contact { padding: 86px 0; }
  .feature-list { grid-template-columns: 1fr; }
  .book-meta { flex-direction: column; gap: 16px; }
  .book-actions { align-items: flex-start; flex-direction: column; }
  .story-mark { min-height: 320px; }
  .contact-links strong { font-size: .92rem; overflow-wrap: anywhere; }
}