:root {
  --ink: #eef7ff;
  --muted: #9fb2c5;
  --navy: #031326;
  --navy-deep: #020b15;
  --navy-soft: #08233c;
  --cyan: #28d9f1;
  --cyan-soft: #8af0ff;
  --line: rgba(127, 215, 239, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--navy-deep);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  align-items: center;
  background: rgba(2, 11, 21, 0.9);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  height: 84px;
  justify-content: space-between;
  left: 0;
  padding: 0 clamp(24px, 5vw, 76px);
  position: absolute;
  right: 0;
  top: 0;
  z-index: 20;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.brand-name {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.24em;
}

.brand-role {
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.header-nav {
  align-items: center;
  display: flex;
  font-size: 13px;
  font-weight: 700;
  gap: 34px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.header-nav > a:not(.header-cta) {
  color: #bac9d7;
  transition: color 180ms ease;
}

.header-nav > a:not(.header-cta):hover {
  color: var(--cyan);
}

.header-cta {
  border: 1px solid rgba(255, 255, 255, 0.65);
  border-radius: 8px;
  padding: 13px 20px;
  transition: border-color 180ms ease, color 180ms ease, background 180ms ease;
}

.header-cta:hover {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #01111e;
}

.hero {
  align-items: center;
  background:
    radial-gradient(circle at 78% 55%, rgba(18, 131, 182, 0.25), transparent 29%),
    radial-gradient(circle at 50% 110%, rgba(23, 157, 200, 0.16), transparent 35%),
    linear-gradient(135deg, #031326 0%, #020c18 64%, #03172b 100%);
  display: grid;
  gap: clamp(36px, 5vw, 96px);
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, 0.8fr);
  min-height: 900px;
  overflow: hidden;
  padding: 145px clamp(28px, 5vw, 76px) 78px;
  position: relative;
}

.hero-grid {
  background-image:
    linear-gradient(rgba(61, 180, 220, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(61, 180, 220, 0.055) 1px, transparent 1px);
  background-size: 44px 44px;
  inset: 84px 0 0;
  mask-image: linear-gradient(to right, black, transparent 75%);
  position: absolute;
}

.hero-orbit {
  border: 1px solid rgba(50, 208, 240, 0.09);
  border-radius: 50%;
  height: 420px;
  left: 41%;
  position: absolute;
  top: 230px;
  width: 420px;
}

.hero-orbit::before,
.hero-orbit::after {
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 16px var(--cyan);
  content: "";
  height: 5px;
  position: absolute;
  width: 5px;
}

.hero-orbit::before {
  right: 48px;
  top: 70px;
}

.hero-orbit::after {
  bottom: 39px;
  left: 76px;
}

.hero-orbit-two {
  height: 250px;
  left: 47%;
  top: 315px;
  transform: rotate(42deg);
  width: 250px;
}

.hero-copy {
  max-width: 760px;
  position: relative;
  z-index: 3;
}

.eyebrow {
  color: var(--cyan);
  font-family: "Courier New", ui-monospace, monospace;
  font-size: clamp(15px, 1.35vw, 20px);
  font-weight: 700;
  letter-spacing: 0.27em;
  margin: 0 0 34px;
  padding-bottom: 22px;
  position: relative;
}

.eyebrow::after {
  background: var(--cyan);
  bottom: 0;
  content: "";
  height: 3px;
  left: 0;
  position: absolute;
  width: 42px;
}

h1 {
  font-size: clamp(48px, 5.25vw, 82px);
  font-weight: 780;
  letter-spacing: -0.05em;
  line-height: 0.99;
  margin: 0;
  max-width: 860px;
}

h1 span {
  color: #dcecff;
  display: block;
  font-weight: 670;
  margin-top: 8px;
}

.hero-description {
  color: #c0cfdd;
  font-size: clamp(18px, 1.65vw, 24px);
  line-height: 1.5;
  margin: 30px 0 0;
  max-width: 690px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  align-items: center;
  border-radius: 8px;
  display: inline-flex;
  font-size: 14px;
  font-weight: 850;
  justify-content: center;
  letter-spacing: 0.04em;
  min-height: 60px;
  padding: 0 28px;
  text-transform: uppercase;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: linear-gradient(90deg, #22c9e5, #35e1f4);
  box-shadow: 0 14px 42px rgba(27, 211, 237, 0.18);
  color: #01111e;
}

.button-primary:hover {
  box-shadow: 0 18px 46px rgba(27, 211, 237, 0.3);
}

.button-secondary {
  border: 1px solid rgba(167, 218, 232, 0.34);
  color: #d7e6f2;
}

.button-secondary:hover {
  background: rgba(255, 255, 255, 0.06);
}

.hero-benefits {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  list-style: none;
  margin: 42px 0 0;
  max-width: 680px;
  padding: 0;
}

.hero-benefits li {
  align-items: center;
  border-right: 1px solid rgba(255, 255, 255, 0.22);
  display: flex;
  font-size: 14px;
  gap: 12px;
  line-height: 1.25;
  padding: 0 22px;
}

.hero-benefits li:first-child {
  padding-left: 0;
}

.hero-benefits li:last-child {
  border: 0;
}

.benefit-number {
  color: var(--cyan);
  font-family: "Courier New", monospace;
  font-size: 13px;
  font-weight: 800;
}

.book-stage {
  align-items: center;
  align-self: stretch;
  display: flex;
  justify-content: center;
  min-height: 610px;
  perspective: 1400px;
  position: relative;
  z-index: 2;
}

.book-stage::before {
  background: radial-gradient(ellipse, rgba(44, 210, 244, 0.19), transparent 65%);
  content: "";
  height: 50%;
  inset: auto 0 4%;
  position: absolute;
}

.book-object {
  filter: drop-shadow(34px 38px 34px rgba(0, 0, 0, 0.48));
  position: relative;
  transform: rotateY(-9deg) rotateX(1deg);
  transform-style: preserve-3d;
  width: min(88%, 465px);
  z-index: 2;
}

.book-object img {
  border-radius: 3px 8px 8px 3px;
  display: block;
  height: auto;
  position: relative;
  width: 100%;
  z-index: 2;
}

.book-object::before {
  background: linear-gradient(90deg, #06111d, #102538 35%, #071522);
  border-radius: 3px 0 0 3px;
  bottom: 2%;
  box-shadow: inset -1px 0 rgba(255,255,255,.16);
  content: "";
  left: -13px;
  position: absolute;
  top: 2%;
  transform: rotateY(80deg);
  transform-origin: right;
  width: 22px;
  z-index: 1;
}

.book-pages {
  background: repeating-linear-gradient(90deg, #e4e0d5 0 2px, #bbb8af 2px 3px);
  border-radius: 0 4px 4px 0;
  bottom: 5px;
  position: absolute;
  right: -10px;
  top: 5px;
  transform: translateZ(-8px);
  width: 16px;
}

.book-shadow {
  background: rgba(0, 0, 0, 0.7);
  border-radius: 50%;
  bottom: 12%;
  filter: blur(22px);
  height: 40px;
  position: absolute;
  transform: rotate(-4deg);
  width: 76%;
}

.scan-line {
  animation: scan 5s ease-in-out infinite;
  background: linear-gradient(90deg, transparent, rgba(46, 218, 244, 0.7), transparent);
  box-shadow: 0 0 18px rgba(46, 218, 244, 0.6);
  height: 1px;
  left: 6%;
  position: absolute;
  right: 6%;
  top: 28%;
  z-index: 4;
}

.cover-note {
  bottom: 0;
  color: #86a7b8;
  font-family: "Courier New", monospace;
  font-size: 11px;
  letter-spacing: 0.16em;
  margin: 0;
  position: absolute;
}

.trust-bar {
  background: #f3f8fb;
  color: #061a2a;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 28px clamp(28px, 5vw, 76px);
}

.trust-bar div {
  border-right: 1px solid #ccdce5;
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 0 clamp(16px, 3vw, 46px);
}

.trust-bar div:first-child {
  padding-left: 0;
}

.trust-bar div:last-child {
  border: 0;
}

.trust-bar strong {
  font-size: 18px;
}

.trust-bar span {
  color: #557184;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.section {
  margin: 0 auto;
  max-width: 1440px;
  padding: 118px clamp(28px, 6vw, 92px);
}

.section-kicker {
  color: #0d96b5;
  font-family: var(--font-geist-mono), "Courier New", monospace;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.2em;
  margin: 0 0 18px;
}

.section h2,
.author-section h2,
.buy-section h2,
.closing-section h2 {
  color: #061a2a;
  font-size: clamp(37px, 4.25vw, 62px);
  font-weight: 760;
  letter-spacing: -0.045em;
  line-height: 1.04;
  margin: 0;
}

.section-heading {
  margin-bottom: 58px;
}

.split-heading {
  align-items: end;
  display: grid;
  gap: clamp(36px, 7vw, 110px);
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.7fr);
}

.split-heading > p,
.section-lead,
.centered-heading > p,
.author-copy > p,
.buy-heading > p {
  color: #526c7d;
  font-size: 17px;
  line-height: 1.75;
  margin: 0;
}

.problem-section {
  background: #f6fafc;
  max-width: none;
}

.problem-section > * {
  margin-left: auto;
  margin-right: auto;
  max-width: 1256px;
}

.insight-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.insight-card {
  background: #fff;
  border: 1px solid #dce8ee;
  border-radius: 16px;
  box-shadow: 0 18px 55px rgba(10, 35, 54, 0.04);
  min-height: 300px;
  padding: 30px;
  position: relative;
}

.insight-card::after {
  background: linear-gradient(90deg, var(--cyan), transparent);
  bottom: 0;
  content: "";
  height: 3px;
  left: 30px;
  position: absolute;
  width: 60px;
}

.insight-card h3,
.audience-grid h3,
.process-track h3,
.offer-card h3 {
  color: #071d2d;
  font-size: 22px;
  letter-spacing: -0.025em;
  line-height: 1.2;
  margin: 54px 0 14px;
}

.insight-card p,
.audience-grid p,
.process-track p,
.offer-card p {
  color: #5c7382;
  font-size: 15px;
  line-height: 1.7;
  margin: 0;
}

.card-index {
  color: #0c94b2;
  font-family: var(--font-geist-mono), monospace;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.accent-card {
  background: #061b2e;
  border-color: #0a3853;
}

.accent-card h3 {
  color: #f0f9ff;
}

.accent-card p {
  color: #a9bfcd;
}

.topics-section {
  align-items: center;
  background: #fff;
  display: grid;
  gap: clamp(54px, 9vw, 130px);
  grid-template-columns: minmax(300px, 0.78fr) minmax(0, 1.05fr);
}

.topics-visual {
  align-items: center;
  background:
    linear-gradient(rgba(33, 203, 237, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(33, 203, 237, 0.08) 1px, transparent 1px),
    radial-gradient(circle at 50% 50%, #0a3a57, #041524 68%);
  background-size: 34px 34px, 34px 34px, auto;
  border-radius: 24px;
  display: flex;
  justify-content: center;
  min-height: 590px;
  overflow: hidden;
  padding: 44px;
  position: relative;
}

.topics-visual::after {
  border: 1px solid rgba(42, 218, 244, 0.17);
  border-radius: 50%;
  content: "";
  height: 410px;
  position: absolute;
  width: 410px;
}

.evidence-window {
  backdrop-filter: blur(12px);
  background: rgba(2, 15, 27, 0.83);
  border: 1px solid rgba(61, 224, 250, 0.35);
  border-radius: 14px;
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.36), inset 0 0 80px rgba(22, 180, 217, 0.06);
  color: #b9d4df;
  max-width: 400px;
  padding: 62px 30px 32px;
  position: relative;
  transform: rotate(-2deg);
  width: 100%;
  z-index: 2;
}

.window-top {
  align-items: center;
  border-bottom: 1px solid rgba(255,255,255,.1);
  display: flex;
  gap: 7px;
  height: 38px;
  left: 0;
  padding: 0 15px;
  position: absolute;
  right: 0;
  top: 0;
}

.window-top span {
  background: #466174;
  border-radius: 50%;
  height: 7px;
  width: 7px;
}

.window-top span:last-child {
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan);
}

.code-line {
  font-family: var(--font-geist-mono), monospace;
  font-size: 12px;
  letter-spacing: 0.04em;
  margin: 0 0 18px;
}

.code-line b {
  color: var(--cyan);
  display: inline-block;
  margin-right: 16px;
  width: 58px;
}

.hash-track {
  background: #17344a;
  height: 4px;
  margin: 30px 0 44px;
  overflow: hidden;
}

.hash-track i {
  background: linear-gradient(90deg, #16b7d5, #6ef0ff);
  display: block;
  height: 100%;
  width: 86%;
}

.fingerprint-mark {
  align-items: center;
  border: 1px solid rgba(47, 224, 249, .45);
  border-radius: 50%;
  color: var(--cyan);
  display: flex;
  font-family: var(--font-geist-mono), monospace;
  font-size: 42px;
  font-weight: 800;
  height: 170px;
  justify-content: center;
  margin: 0 auto 28px;
  text-shadow: 0 0 30px rgba(49, 226, 248, .4);
  width: 170px;
}

.fingerprint-mark::before,
.fingerprint-mark::after {
  border: 1px solid rgba(47, 224, 249, .3);
  border-radius: 50%;
  content: "";
  position: absolute;
}

.fingerprint-mark::before {
  height: 126px;
  width: 126px;
}

.fingerprint-mark::after {
  height: 84px;
  width: 84px;
}

.verified-label {
  color: #7ff1ff;
  font-family: var(--font-geist-mono), monospace;
  font-size: 11px;
  letter-spacing: .12em;
  margin: 0;
  text-align: center;
}

.topics-copy h2 {
  max-width: 670px;
}

.section-lead {
  margin-top: 24px;
  max-width: 650px;
}

.topic-list {
  display: grid;
  gap: 0 26px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  list-style: none;
  margin: 38px 0 0;
  padding: 0;
}

.topic-list li {
  align-items: center;
  border-top: 1px solid #dce6eb;
  color: #173246;
  display: flex;
  font-size: 14px;
  font-weight: 680;
  gap: 13px;
  line-height: 1.35;
  min-height: 68px;
}

.topic-list li span {
  color: #0b99b8;
  font-family: var(--font-geist-mono), monospace;
  font-size: 11px;
}

.process-section {
  background: #06192b;
  max-width: none;
}

.process-section > * {
  margin-left: auto;
  margin-right: auto;
  max-width: 1256px;
}

.centered-heading {
  margin-bottom: 64px;
  text-align: center;
}

.centered-heading h2 {
  color: #f2f9ff;
}

.centered-heading > p {
  color: #9cb1c0;
  margin: 22px auto 0;
  max-width: 690px;
}

.process-section .section-kicker {
  color: var(--cyan);
}

.process-track {
  display: grid;
  gap: 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.process-track article {
  border-left: 1px solid rgba(112, 193, 216, .22);
  min-height: 250px;
  padding: 18px 46px 24px;
  position: relative;
}

.process-track article:last-child {
  border-right: 1px solid rgba(112, 193, 216, .22);
}

.process-track article::before {
  background: var(--cyan);
  box-shadow: 0 0 16px rgba(40, 217, 241, .6);
  content: "";
  height: 2px;
  left: 0;
  position: absolute;
  top: 0;
  width: 70px;
}

.process-track span {
  color: var(--cyan);
  font-family: var(--font-geist-mono), monospace;
  font-size: 13px;
}

.process-track h3 {
  color: #edf8ff;
  font-size: 28px;
  margin-top: 46px;
}

.process-track p {
  color: #9cb1c0;
}

.audience-section {
  background: #f7fafc;
  max-width: none;
}

.audience-section > * {
  margin-left: auto;
  margin-right: auto;
  max-width: 1256px;
}

.audience-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.audience-grid article {
  border: 1px solid #d7e5eb;
  border-radius: 14px;
  min-height: 270px;
  padding: 28px;
  transition: border-color 180ms ease, transform 180ms ease, background 180ms ease;
}

.audience-grid article:hover {
  background: white;
  border-color: #8edbe9;
  transform: translateY(-4px);
}

.audience-grid article > span {
  color: #0b95b2;
  font-family: var(--font-geist-mono), monospace;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .16em;
}

.audience-grid h3 {
  margin-top: 48px;
}

.author-section {
  align-items: stretch;
  background: #fff;
  display: grid;
  grid-template-columns: minmax(330px, 0.82fr) minmax(420px, 1.18fr);
  margin: 0 auto;
  max-width: 1440px;
  min-height: 720px;
}

.author-photo {
  background: #061a2d;
  min-height: 640px;
  overflow: hidden;
  position: relative;
}

.author-photo::after {
  background:
    linear-gradient(90deg, #061a2d 0 10%, rgba(6, 26, 45, .84) 16%, transparent 32%),
    linear-gradient(90deg, transparent 68%, rgba(6, 26, 45, .14)),
    linear-gradient(0deg, rgba(5, 19, 33, .4), transparent 35%);
  content: "";
  inset: 0;
  position: absolute;
}

.author-photo img {
  height: 100%;
  object-fit: cover;
  object-position: center;
  transform: scale(1.72);
  transform-origin: right center;
  width: 100%;
}

.author-copy {
  align-self: center;
  padding: 90px clamp(42px, 7vw, 108px);
}

.author-copy h2 {
  margin-bottom: 10px;
}

.author-role {
  color: #0b94b2 !important;
  font-size: 14px !important;
  font-weight: 760;
  letter-spacing: .08em;
  margin-bottom: 32px !important;
  text-transform: uppercase;
}

.author-copy > p:not(.author-role) {
  margin-bottom: 18px;
}

.text-link {
  border-bottom: 1px solid #9fc5d1;
  color: #082b40;
  display: inline-flex;
  font-size: 14px;
  font-weight: 780;
  gap: 10px;
  margin-top: 18px;
  padding-bottom: 6px;
}

.text-link span {
  color: #0b99b8;
}

.buy-section {
  background:
    linear-gradient(rgba(45, 198, 233, .04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 198, 233, .04) 1px, transparent 1px),
    #031326;
  background-size: 48px 48px;
  padding: 120px clamp(28px, 6vw, 92px);
}

.buy-heading,
.buy-layout,
.price-note {
  margin-left: auto;
  margin-right: auto;
  max-width: 1180px;
}

.buy-heading {
  margin-bottom: 64px;
  text-align: center;
}

.buy-heading h2 {
  color: #f2f9ff;
  margin-left: auto;
  margin-right: auto;
  max-width: 860px;
}

.buy-heading > p {
  color: #9db2c2;
  margin-top: 20px;
}

.buy-layout {
  align-items: center;
  display: grid;
  gap: clamp(56px, 8vw, 120px);
  grid-template-columns: minmax(250px, .6fr) minmax(420px, 1.2fr);
}

.buy-cover {
  justify-self: center;
  perspective: 1200px;
  width: min(100%, 340px);
}

.buy-cover img {
  border-radius: 4px 8px 8px 4px;
  box-shadow: 30px 40px 55px rgba(0,0,0,.48);
  display: block;
  height: auto;
  transform: rotateY(-10deg);
  width: 100%;
}

.offer-stack {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.offer-card {
  align-items: center;
  background: rgba(255,255,255,.045);
  border: 1px solid rgba(148, 210, 226, .22);
  border-radius: 16px;
  display: flex;
  gap: 28px;
  justify-content: space-between;
  padding: 30px;
}

.featured-offer {
  background: rgba(23, 154, 188, .1);
  border-color: rgba(52, 217, 244, .55);
}

.offer-tag {
  color: var(--cyan);
  font-family: var(--font-geist-mono), monospace;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .14em;
}

.offer-card h3 {
  color: #f2f9ff;
  font-size: 27px;
  margin: 9px 0 8px;
}

.offer-card p {
  color: #9fb3c1;
  max-width: 400px;
}

.offer-actions {
  align-items: center;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 268px;
}

.offer-actions .button {
  font-size: 12px;
  min-height: 54px;
  padding: 0 20px;
  text-align: center;
  width: 100%;
}

.store-link {
  color: #b2c6d2;
  font-size: 12px;
  font-weight: 700;
}

.store-link:hover {
  color: var(--cyan);
}

.light-button {
  border-color: rgba(180, 220, 230, .38);
}

.price-note {
  color: #708a9b;
  font-size: 11px;
  margin-top: 32px;
  text-align: center;
}

.faq-section {
  background: #fff;
  display: grid;
  gap: clamp(50px, 9vw, 130px);
  grid-template-columns: minmax(260px, .75fr) minmax(420px, 1.25fr);
}

.faq-list {
  border-top: 1px solid #d5e3e9;
}

.faq-list details {
  border-bottom: 1px solid #d5e3e9;
  color: #122f42;
  padding: 24px 0;
}

.faq-list summary {
  cursor: pointer;
  font-size: 17px;
  font-weight: 740;
  list-style: none;
  padding-right: 40px;
  position: relative;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  color: #0a98b7;
  content: "+";
  font-family: var(--font-geist-mono), monospace;
  font-size: 24px;
  position: absolute;
  right: 4px;
  top: -5px;
}

.faq-list details[open] summary::after {
  content: "−";
}

.faq-list details p {
  color: #607887;
  font-size: 15px;
  line-height: 1.75;
  margin: 18px 40px 0 0;
}

.closing-section {
  background: #f1f8fa;
  padding: 100px 28px;
  text-align: center;
}

.closing-section h2 {
  margin: 0 auto;
  max-width: 840px;
}

.closing-section .button {
  margin-top: 34px;
}

footer {
  align-items: center;
  background: #020c16;
  color: #91a8b7;
  display: flex;
  font-size: 11px;
  justify-content: space-between;
  padding: 36px clamp(28px, 6vw, 92px);
}

footer p {
  margin: 0;
}

footer > a:last-child {
  color: #bed0dc;
}

.mobile-buy {
  display: none;
}

@keyframes scan {
  0%, 100% { opacity: 0; transform: translateY(-80px); }
  20%, 80% { opacity: 0.6; }
  50% { opacity: 0.9; transform: translateY(250px); }
}

@media (max-width: 940px) {
  .header-nav > a:not(.header-cta) {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    padding-top: 138px;
    text-align: center;
  }

  .hero-copy {
    margin: 0 auto;
  }

  .eyebrow::after {
    left: 50%;
    transform: translateX(-50%);
  }

  .hero-actions,
  .hero-benefits {
    justify-content: center;
    margin-left: auto;
    margin-right: auto;
  }

  .book-stage {
    min-height: 640px;
  }

  .book-object {
    width: min(76vw, 400px);
  }

  .split-heading,
  .topics-section,
  .faq-section {
    grid-template-columns: 1fr;
  }

  .insight-grid,
  .audience-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .topics-visual {
    min-height: 520px;
  }

  .author-section {
    grid-template-columns: .82fr 1fr;
  }

  .author-copy {
    padding: 70px 42px;
  }

  .buy-layout {
    grid-template-columns: 280px minmax(0, 1fr);
  }

  .offer-card {
    align-items: stretch;
    flex-direction: column;
  }

  .offer-actions {
    min-width: 0;
  }
}

@media (max-width: 620px) {
  .site-header {
    height: 72px;
    padding: 0 20px;
  }

  .brand-role {
    display: none;
  }

  .brand-name {
    font-size: 13px;
  }

  .header-cta {
    font-size: 10px;
    padding: 11px 13px;
  }

  .hero {
    min-height: 0;
    padding: 118px 20px 46px;
  }

  .eyebrow {
    font-size: 12px;
    letter-spacing: 0.2em;
    margin-bottom: 26px;
  }

  h1 {
    font-size: clamp(40px, 12.8vw, 56px);
  }

  .hero-description {
    font-size: 17px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .hero-benefits {
    gap: 20px;
    grid-template-columns: 1fr;
  }

  .hero-benefits li,
  .hero-benefits li:first-child {
    border: 0;
    justify-content: center;
    padding: 0;
  }

  .book-stage {
    min-height: 500px;
  }

  .trust-bar {
    gap: 22px;
    grid-template-columns: repeat(2, 1fr);
  }

  .trust-bar div,
  .trust-bar div:first-child {
    border: 0;
    padding: 0;
  }

  .section {
    padding: 78px 20px;
  }

  .section-heading {
    margin-bottom: 38px;
  }

  .section h2,
  .author-section h2,
  .buy-section h2,
  .closing-section h2 {
    font-size: 37px;
  }

  .split-heading {
    gap: 24px;
  }

  .insight-grid,
  .audience-grid,
  .process-track,
  .topic-list {
    grid-template-columns: 1fr;
  }

  .insight-card {
    min-height: 250px;
  }

  .topics-section {
    gap: 44px;
  }

  .topics-visual {
    min-height: 440px;
    padding: 24px;
  }

  .evidence-window {
    padding-left: 20px;
    padding-right: 20px;
  }

  .fingerprint-mark {
    font-size: 70px;
    height: 130px;
    width: 130px;
  }

  .topic-list {
    gap: 0;
  }

  .process-track article,
  .process-track article:last-child {
    border-bottom: 1px solid rgba(112, 193, 216, .22);
    border-left: 0;
    border-right: 0;
    min-height: 0;
    padding: 30px 4px 36px;
  }

  .process-track h3 {
    margin-top: 26px;
  }

  .audience-grid article {
    min-height: 230px;
  }

  .author-section {
    grid-template-columns: 1fr;
  }

  .author-photo {
    min-height: 520px;
  }

  .author-photo img {
    transform: scale(1.55);
    transform-origin: right center;
  }

  .author-copy {
    padding: 70px 20px;
  }

  .buy-section {
    padding: 82px 20px;
  }

  .buy-layout {
    gap: 62px;
    grid-template-columns: 1fr;
  }

  .buy-cover {
    width: min(78vw, 300px);
  }

  .offer-card {
    padding: 26px 22px;
  }

  .faq-section {
    gap: 30px;
  }

  .closing-section {
    padding: 80px 20px 120px;
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 20px;
    padding-bottom: 100px;
    
  }

  .mobile-buy {
    background: var(--cyan);
    bottom: 12px;
    box-shadow: 0 12px 35px rgba(0,0,0,.4);
    color: #03111c;
    display: block;
    font-size: 13px;
    font-weight: 850;
    left: 12px;
    letter-spacing: .05em;
    padding: 17px;
    position: fixed;
    right: 12px;
    text-align: center;
    text-transform: uppercase;
    z-index: 30;
  }
  
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .scan-line { animation: none; }
}