/* Fonts loaded via <link> in HTML head for performance */

/* ==========================================================================
   CSS CUSTOM PROPERTIES
   ========================================================================== */
:root {
  --bg-1: #050505;
  --bg-2: #080808;
  --bg-3: #0A0A0A;
  --bg-4: #0D1117;
  --bg-5: #10141C;
  --bg-card: #0B0D11;

  --electric-blue-light: #008CFF;
  --electric-blue: #007BFF;
  --electric-blue-dark: #0066FF;

  --deep-blue-light: #002B73;
  --deep-blue: #001A4D;

  --cyan-glow-light: #DDFBFF;
  --cyan-glow: #8CEEFF;
  --cyan-glow-dark: #00D9FF;

  --text-primary: #FFFFFF;
  --text-secondary: #B8C0CC;
  --text-muted: #747C89;

  --warning-red: #FF2525;
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-blue: rgba(0, 123, 255, 0.3);

  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-editorial: 'Playfair Display', Georgia, serif;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  --shadow-glow: 0 0 20px rgba(0, 123, 255, 0.3);
  --shadow-glow-strong: 0 0 40px rgba(0, 140, 255, 0.5);
  --shadow-cyan-glow: 0 0 30px rgba(0, 217, 255, 0.4);
  --shadow-book: 0 25px 50px rgba(0, 0, 0, 0.6), 0 0 80px rgba(0, 123, 255, 0.08);

  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.8s cubic-bezier(0.16, 1, 0.3, 1);

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.5rem;
  --text-2xl: 2rem;
  --text-3xl: 2.5rem;
  --text-4xl: 3.5rem;

  --nav-height: 72px;
}

/* ==========================================================================
   RESET & BASE
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg-1);
  color: var(--text-primary);
  font-family: var(--font-primary);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

button {
  border: none;
  background: none;
  font-family: inherit;
  cursor: pointer;
  color: inherit;
}

ul, ol {
  list-style: none;
}

:focus-visible {
  outline: 2px solid var(--electric-blue);
  outline-offset: 4px;
}

::selection {
  background: rgba(0, 123, 255, 0.3);
  color: var(--text-primary);
}

/* ==========================================================================
   SKIP LINK
   ========================================================================== */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  background: var(--electric-blue);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  z-index: 999;
  font-weight: 600;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
}

/* ==========================================================================
   TYPOGRAPHY UTILITIES
   ========================================================================== */
.text-eyebrow {
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--electric-blue-light);
  margin-bottom: var(--space-4);
  text-align: center;
}

.text-display-accent {
  color: var(--electric-blue-light);
  font-family: var(--font-editorial);
  font-style: italic;
}

.text-lead {
  font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.4rem);
  color: var(--text-secondary);
  line-height: 1.7;
}

.text-muted {
  color: var(--text-muted);
}

.text-muted-inline {
  color: var(--text-muted);
}

.text-accent {
  color: var(--electric-blue-light);
}

.text-center {
  text-align: center;
}

/* ==========================================================================
   LAYOUT
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* ==========================================================================
   SECTIONS
   ========================================================================== */
.section {
  padding: clamp(4rem, 8vw, 7rem) 0;
  position: relative;
  z-index: 1;
}

.section--elevated {
  background-color: var(--bg-3);
}

.section--atmospheric {
  background: radial-gradient(ellipse at 50% 40%, rgba(0, 27, 73, 0.15) 0%, var(--bg-1) 70%);
}

.section--deep {
  background-color: var(--bg-4);
}

.section__title {
  font-size: clamp(1.8rem, 3vw + 0.5rem, 3rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  text-align: center;
  margin-bottom: var(--space-12);
  text-wrap: balance;
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: var(--text-base);
  letter-spacing: 0.02em;
  transition: all var(--transition-fast);
  text-align: center;
  white-space: nowrap;
  cursor: pointer;
  border: none;
}

.btn--primary {
  background-color: var(--electric-blue);
  color: #FFF;
  box-shadow: 0 4px 20px rgba(0, 123, 255, 0.25);
}

.btn--primary:hover {
  background-color: var(--electric-blue-light);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.btn--primary:active {
  transform: translateY(0) scale(0.97);
}

.btn--secondary {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn--secondary:hover {
  border-color: var(--electric-blue);
  color: var(--electric-blue-light);
}

.btn--large {
  padding: var(--space-4) var(--space-10);
  font-size: var(--text-lg);
  border-radius: var(--radius-md);
}

.btn--nav {
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-sm);
}

/* ==========================================================================
   NAVIGATION
   ========================================================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: var(--space-4) 0;
  transition: all var(--transition-normal);
  background: transparent;
}

.nav--scrolled {
  background: rgba(5, 5, 5, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  padding: var(--space-3) 0;
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.nav__logo {
  text-decoration: none;
  flex-shrink: 0;
}

.nav__logo-text {
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.nav__links {
  display: flex;
  gap: var(--space-8);
  align-items: center;
}

.nav__links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.nav__links a:hover {
  color: var(--text-primary);
}

.nav__cta {
  flex-shrink: 0;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  cursor: pointer;
  z-index: 201;
  padding: 10px;
  -webkit-tap-highlight-color: transparent;
  position: relative;
}

.nav__toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  transition: all 0.3s ease;
  border-radius: 2px;
  transform-origin: center;
}

/* Hamburger → X animation */
.nav__toggle--active .nav__toggle-bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.nav__toggle--active .nav__toggle-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav__toggle--active .nav__toggle-bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.nav__mobile {
  position: fixed;
  inset: 0;
  background-color: rgba(5, 5, 5, 0.98);
  z-index: 200;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

.nav__mobile--active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.nav__mobile-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-8);
  padding: var(--space-8);
}

.nav__mobile-links li {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.nav__mobile--active .nav__mobile-links li {
  opacity: 1;
  transform: translateY(0);
}

.nav__mobile--active .nav__mobile-links li:nth-child(1) { transition-delay: 0.05s; }
.nav__mobile--active .nav__mobile-links li:nth-child(2) { transition-delay: 0.1s; }
.nav__mobile--active .nav__mobile-links li:nth-child(3) { transition-delay: 0.15s; }
.nav__mobile--active .nav__mobile-links li:nth-child(4) { transition-delay: 0.2s; }
.nav__mobile--active .nav__mobile-links li:nth-child(5) { transition-delay: 0.25s; }

.nav__mobile-links a {
  font-size: clamp(1.25rem, 4vw, 1.75rem);
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.nav__mobile-links a:hover {
  color: var(--text-primary);
}

.nav__mobile-links .btn {
  margin-top: var(--space-4);
  white-space: normal;
  text-align: center;
  line-height: 1.4;
}

/* ==========================================================================
   HERO
   ========================================================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: calc(var(--nav-height) + var(--space-8));
  padding-bottom: var(--space-16);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
}

.hero__glow {
  position: absolute;
  top: 50%;
  right: 15%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 123, 255, 0.1) 0%, rgba(0, 123, 255, 0.03) 40%, transparent 70%);
  transform: translateY(-50%);
  pointer-events: none;
}

.hero__neural-lines {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(0, 217, 255, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(0, 123, 255, 0.04) 0%, transparent 40%);
  pointer-events: none;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

.hero__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.hero__eyebrow {
  text-align: left;
  margin-bottom: 0;
}

.hero__title {
  font-size: clamp(2.2rem, 4vw + 0.8rem, 4.2rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.hero__subtitle {
  color: var(--text-secondary);
  font-size: clamp(1rem, 1.2vw + 0.4rem, 1.2rem);
  line-height: 1.7;
  max-width: 540px;
}

.hero__offer {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.hero__author {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.hero__price {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
}

.hero__price-amount {
  font-size: clamp(2rem, 3vw, 3rem);
  font-weight: 900;
  letter-spacing: -0.02em;
}

.hero__price-note {
  font-size: var(--text-sm);
  color: var(--text-muted);
  font-weight: 500;
}

.hero__actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  align-items: flex-start;
}

.hero__trust {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

/* Hero Book */
.hero__book-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero__book {
  position: relative;
  perspective: 1000px;
  z-index: 1;
}

.hero__book-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 120%;
  height: 120%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(0, 123, 255, 0.12) 0%, rgba(0, 217, 255, 0.04) 40%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

.hero__book-img {
  width: 100%;
  max-width: 380px;
  height: auto;
  border-radius: var(--radius-sm);
  filter: drop-shadow(0 30px 60px rgba(0, 0, 0, 0.5)) drop-shadow(0 0 40px rgba(0, 123, 255, 0.08));
}

.hero__book-shadow {
  position: absolute;
  bottom: -20px;
  left: 10%;
  width: 80%;
  height: 40px;
  background: radial-gradient(ellipse, rgba(0, 0, 0, 0.5) 0%, transparent 70%);
  filter: blur(15px);
  pointer-events: none;
}

/* ==========================================================================
   CURIOSITY SECTION
   ========================================================================== */
.curiosity {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.curiosity__headline {
  font-size: clamp(1.4rem, 2.5vw + 0.5rem, 2.4rem);
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: var(--space-8);
}

.curiosity__divider {
  width: 60px;
  height: 2px;
  background: var(--electric-blue);
  margin: var(--space-8) auto;
  box-shadow: 0 0 10px rgba(0, 123, 255, 0.4);
}

.curiosity__statement {
  font-family: var(--font-editorial);
  font-size: clamp(1.3rem, 2vw + 0.4rem, 2rem);
  font-style: italic;
  color: var(--text-secondary);
  margin-bottom: var(--space-12);
}

.curiosity__core {
  font-size: clamp(1.6rem, 3vw + 0.5rem, 3rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

/* ==========================================================================
   QUICK = QUACK
   ========================================================================== */
.quickquack-section {
  padding: clamp(3rem, 8vw, 6rem) 0;
}

.quickquack {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: clamp(0.5rem, 2vw, 1.5rem);
  flex-wrap: wrap;
  margin-bottom: var(--space-12);
}

.quickquack__word {
  font-size: clamp(4rem, 12vw, 11rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.05em;
  text-transform: uppercase;
}

.quickquack__equals {
  font-size: clamp(3rem, 8vw, 8rem);
  font-weight: 300;
  line-height: 1;
}

.quickquack__explanation {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* ==========================================================================
   PROBLEM SECTION
   ========================================================================== */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-6);
  max-width: 1000px;
  margin: 0 auto;
}

.problem-item {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  padding: var(--space-6);
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-lg);
  border: 1px solid transparent;
  transition: all var(--transition-normal);
}

.problem-item:hover {
  border-color: rgba(255, 37, 37, 0.15);
  background: rgba(255, 37, 37, 0.03);
}

.problem-item__icon {
  color: var(--warning-red);
  font-weight: 800;
  font-size: var(--text-lg);
  flex-shrink: 0;
  margin-top: 2px;
}

.problem-item p {
  color: var(--text-secondary);
  font-size: var(--text-base);
  line-height: 1.65;
}

/* ==========================================================================
   SELLING TO HUMANS
   ========================================================================== */
.humans-section {
  text-align: center;
  position: relative;
  padding: var(--space-8) 0;
}

.brain-ring {
  width: clamp(200px, 30vw, 300px);
  height: clamp(200px, 30vw, 300px);
  border-radius: 50%;
  margin: 0 auto var(--space-12);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brain-ring__circle {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid var(--cyan-glow);
  box-shadow:
    0 0 30px rgba(0, 217, 255, 0.15),
    inset 0 0 30px rgba(0, 217, 255, 0.08);
  animation: breathe 4s ease-in-out infinite alternate;
}

.brain-ring__glow {
  position: absolute;
  inset: -30%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 217, 255, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

@keyframes breathe {
  0% {
    transform: scale(1);
    box-shadow: 0 0 30px rgba(0, 217, 255, 0.15), inset 0 0 30px rgba(0, 217, 255, 0.08);
  }
  100% {
    transform: scale(1.03);
    box-shadow: 0 0 50px rgba(0, 217, 255, 0.3), inset 0 0 50px rgba(0, 217, 255, 0.15);
  }
}

.humans-section__content {
  max-width: 700px;
  margin: 0 auto;
}

.humans-section__headline {
  font-size: clamp(1.6rem, 3vw + 0.4rem, 2.8rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.humans-section__headline--accent {
  margin-bottom: var(--space-12);
}

.humans-section__points {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.humans-point {
  font-size: clamp(1.1rem, 1.5vw + 0.3rem, 1.4rem);
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.humans-point:hover {
  color: var(--text-primary);
}

.humans-point strong {
  color: var(--text-primary);
}

/* ==========================================================================
   AUTHOR SECTION
   ========================================================================== */
.author {
  max-width: 720px;
  margin: 0 auto;
}

.author__story {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.author__block {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.author__block p {
  color: var(--text-secondary);
  line-height: 1.75;
}

.author__block .text-lead {
  font-family: var(--font-editorial);
  font-size: clamp(1.2rem, 1.5vw + 0.4rem, 1.6rem);
  font-style: italic;
  color: var(--text-primary);
  line-height: 1.5;
}

/* ==========================================================================
   WHAT YOU'LL DISCOVER
   ========================================================================== */
.discover-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

.discover-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.discover-item__number {
  font-family: var(--font-editorial);
  font-size: var(--text-2xl);
  font-weight: 700;
  opacity: 0.8;
}

.discover-item__title {
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1.3;
}

.discover-item p {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.7;
}

/* ==========================================================================
   CARDS
   ========================================================================== */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card:hover {
  border-color: var(--border-blue);
  box-shadow: 0 0 20px rgba(0, 123, 255, 0.08);
  transform: translateY(-3px);
}

/* ==========================================================================
   PSYCHOLOGY FRAMEWORK
   ========================================================================== */
.framework {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  max-width: 500px;
  margin: 0 auto;
  position: relative;
}

.framework__step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-6) 0;
  position: relative;
  z-index: 1;
}

.framework__node {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 2px solid var(--deep-blue-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  background: var(--bg-1);
  position: relative;
}

.framework__node-inner {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--deep-blue-light);
  transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.framework__node--active {
  border-color: var(--cyan-glow-dark);
  box-shadow: 0 0 20px rgba(0, 217, 255, 0.3), 0 0 40px rgba(0, 217, 255, 0.1);
}

.framework__node--active .framework__node-inner {
  background: var(--cyan-glow-dark);
  box-shadow: 0 0 10px rgba(0, 217, 255, 0.5);
}

.framework__label {
  font-size: var(--text-sm);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  transition: color 0.6s ease;
  margin-bottom: var(--space-1);
}

.framework__node--active ~ .framework__label {
  color: var(--text-primary);
}

/* Sibling selectors for active state text */
.framework__step:has(.framework__node--active) .framework__label {
  color: var(--text-primary);
}

.framework__step:has(.framework__node--active) .framework__desc {
  color: var(--text-secondary);
}

.framework__desc {
  font-size: var(--text-sm);
  color: var(--text-muted);
  max-width: 300px;
  transition: color 0.6s ease;
  opacity: 0.6;
}

.framework__line {
  width: 2px;
  height: 40px;
  background: linear-gradient(to bottom, var(--deep-blue-light), var(--cyan-glow-dark));
  opacity: 0.3;
}

/* ==========================================================================
   VIDEO PLAYER
   ========================================================================== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-12);
}

.video-player {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-card);
  cursor: pointer;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
  transition: all var(--transition-normal);
}

.video-player:hover {
  border-color: var(--border-blue);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4), var(--shadow-glow);
}

.video-player__poster {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.video-player__placeholder {
  text-align: center;
  color: var(--text-muted);
  font-size: var(--text-sm);
}

.video-player__placeholder p {
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.video-player__play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 64px;
  height: 64px;
  background-color: var(--electric-blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow-strong);
  transition: all var(--transition-fast);
  border: none;
  cursor: pointer;
  padding: 0;
}

.video-player:hover .video-player__play {
  transform: translate(-50%, -50%) scale(1.1);
}

.video-player__play svg {
  width: 20px;
  height: 20px;
  margin-left: 3px;
}

/* ==========================================================================
   TESTIMONIALS
   ========================================================================== */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

.testimonial {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-6);
  transition: all var(--transition-normal);
}

.testimonial:hover {
  border-color: var(--border-blue);
}

.testimonial__quote {
  font-family: var(--font-editorial);
  font-size: clamp(1rem, 1.2vw + 0.3rem, 1.25rem);
  font-style: italic;
  color: var(--text-primary);
  line-height: 1.6;
}

.testimonial__footer {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.testimonial__author {
  font-weight: 700;
  font-size: var(--text-base);
  font-style: normal;
}

.testimonial__role {
  color: var(--text-muted);
  font-size: var(--text-sm);
}

.testimonial__context {
  font-size: var(--text-xs);
}

/* ==========================================================================
   AI / CHATGPT SECTION
   ========================================================================== */
.ai-section {
  max-width: 900px;
  margin: 0 auto;
}

.ai-section__content {
  margin-top: var(--space-8);
}

.ai-section__argument {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-8);
  align-items: stretch;
}

.ai-section__side {
  padding: var(--space-6);
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
}

.ai-section__side p {
  color: var(--text-secondary);
  margin-top: var(--space-3);
  line-height: 1.7;
}

.ai-section__label {
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.ai-section__divider {
  width: 2px;
  background: linear-gradient(to bottom, transparent, var(--electric-blue), transparent);
  align-self: stretch;
}

/* ==========================================================================
   NUMBERED LIST (WHY THE BASICS)
   ========================================================================== */
.numbered-list {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.numbered-item {
  display: flex;
  gap: var(--space-6);
  align-items: flex-start;
}

.numbered-item__number {
  font-family: var(--font-editorial);
  font-size: clamp(2rem, 3vw, 3rem);
  font-weight: 700;
  line-height: 1;
  flex-shrink: 0;
  min-width: 60px;
}

.numbered-item__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.numbered-item__content h3 {
  font-size: var(--text-lg);
  font-weight: 700;
}

.numbered-item__content p {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ==========================================================================
   OBJECTION HANDLING
   ========================================================================== */
.objection-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-6);
  max-width: 1000px;
  margin: 0 auto;
}

.objection-card h3 {
  font-family: var(--font-editorial);
  font-size: var(--text-lg);
  font-style: italic;
  color: var(--electric-blue-light);
  margin-bottom: var(--space-4);
}

.objection-card p {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ==========================================================================
   AUDIENCE SECTION
   ========================================================================== */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
  max-width: 1000px;
  margin: 0 auto;
}

.audience-item {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-normal);
}

.audience-item:hover {
  border-color: var(--border-blue);
  background: rgba(0, 123, 255, 0.03);
}

.audience-item__icon {
  color: var(--electric-blue-light);
  font-weight: 700;
  font-size: var(--text-lg);
  flex-shrink: 0;
  margin-top: 2px;
}

.audience-item h3 {
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.audience-item p {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.65;
}

/* ==========================================================================
   VALUE SECTION
   ========================================================================== */
.value-section {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-12);
  align-items: center;
  max-width: 900px;
  margin: 0 auto;
}

.value-section__book {
  display: flex;
  justify-content: center;
}

.value-section__book-img {
  max-width: 260px;
  border-radius: var(--radius-sm);
  filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.4));
}

.value-section__details {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.value-section__product-name {
  font-size: clamp(1.5rem, 2vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.value-section__product-type {
  font-size: var(--text-sm);
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.feature-list__item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  color: var(--text-secondary);
  font-size: var(--text-base);
  line-height: 1.6;
}

.feature-list__check {
  color: var(--electric-blue-light);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ==========================================================================
   OFFER SECTION
   ========================================================================== */
.offer {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.offer__intro {
  margin-bottom: var(--space-12);
}

.offer__headline {
  font-size: clamp(1.6rem, 3vw + 0.4rem, 2.8rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-6);
}

.offer__card {
  background: linear-gradient(180deg, var(--bg-4) 0%, var(--bg-card) 100%);
  border: 1px solid var(--border-subtle);
  border-top: 3px solid var(--electric-blue);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.4);
}

.offer__card-inner {
  padding: var(--space-10) var(--space-8);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

.offer__card-inner .text-eyebrow {
  margin-bottom: 0;
}

.offer__product-name {
  font-size: clamp(1.5rem, 2.5vw, 2.2rem);
  font-weight: 900;
  letter-spacing: -0.02em;
}

.offer__author {
  font-size: var(--text-sm);
}

.offer__price {
  margin: var(--space-2) 0;
}

.offer__price-amount {
  font-size: clamp(2.5rem, 4vw, 4rem);
  font-weight: 900;
  letter-spacing: -0.02em;
}

.offer__access {
  font-size: var(--text-sm);
}

.offer__cta {
  margin-top: var(--space-4);
}

.offer__reassurance {
  font-size: var(--text-xs);
  margin-top: var(--space-2);
}

/* ==========================================================================
   REFUND SECTION
   ========================================================================== */
.refund a {
  transition: opacity var(--transition-fast);
}

.refund a:hover {
  opacity: 0.8;
}

/* ==========================================================================
   FAQ ACCORDION
   ========================================================================== */
.accordion {
  display: flex;
  flex-direction: column;
}

.accordion__item {
  border-bottom: 1px solid var(--border-subtle);
}

.accordion__trigger {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-6) 0;
  font-size: clamp(1rem, 1.2vw + 0.3rem, 1.2rem);
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  transition: color var(--transition-fast);
  cursor: pointer;
}

.accordion__trigger:hover {
  color: var(--electric-blue-light);
}

.accordion__icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  position: relative;
}

.accordion__icon::before,
.accordion__icon::after {
  content: '';
  position: absolute;
  background-color: var(--electric-blue);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: transform var(--transition-fast);
}

.accordion__icon::before {
  width: 2px;
  height: 14px;
}

.accordion__icon::after {
  width: 14px;
  height: 2px;
}

.accordion__item--active .accordion__icon::before {
  transform: translate(-50%, -50%) rotate(90deg);
}

.accordion__content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.accordion__content p {
  padding-bottom: var(--space-6);
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ==========================================================================
   FINAL CTA
   ========================================================================== */
.final-cta-section {
  padding: clamp(5rem, 10vw, 9rem) 0;
  background: radial-gradient(ellipse at 50% 60%, rgba(0, 27, 73, 0.2) 0%, var(--bg-1) 70%);
}

.final-cta {
  text-align: center;
  position: relative;
  max-width: 700px;
  margin: 0 auto;
}

.final-cta__glow {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 400px;
  height: 400px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(0, 123, 255, 0.08) 0%, transparent 60%);
  pointer-events: none;
  z-index: -1;
}

.final-cta__headline {
  font-size: clamp(1.8rem, 3vw + 0.5rem, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-10);
}

.final-cta__book {
  display: flex;
  justify-content: center;
  margin-bottom: var(--space-8);
}

.final-cta__book-img {
  max-width: 200px;
  border-radius: var(--radius-sm);
  filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.5)) drop-shadow(0 0 30px rgba(0, 123, 255, 0.06));
}

.final-cta__offer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-10);
}

.final-cta__product {
  font-size: var(--text-lg);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.final-cta__price {
  font-size: clamp(2.5rem, 4vw, 4rem);
  font-weight: 900;
  letter-spacing: -0.02em;
}

.final-cta__reassurance {
  font-size: var(--text-xs);
  margin-top: var(--space-2);
}

.final-cta__closing {
  font-family: var(--font-editorial);
  font-size: clamp(1.05rem, 1.3vw + 0.3rem, 1.25rem);
  font-style: italic;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 560px;
  margin: 0 auto;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  padding: var(--space-12) 0 var(--space-8);
  border-top: 1px solid var(--border-subtle);
  background-color: var(--bg-1);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
  text-align: center;
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.footer__logo {
  font-weight: 800;
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
  text-transform: uppercase;
}

.footer__author {
  font-size: var(--text-sm);
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4) var(--space-6);
}

.footer__link {
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--text-primary);
}

.footer__copyright {
  font-size: var(--text-xs);
}

/* ==========================================================================
   STICKY MOBILE CTA
   ========================================================================== */
.sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: rgba(5, 5, 5, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--border-subtle);
  z-index: 90;
  text-align: center;
  display: none;
  transform: translateY(100%);
  transition: transform var(--transition-normal);
}

.sticky-cta--visible {
  transform: translateY(0);
}

.sticky-cta__btn {
  width: 100%;
  max-width: 400px;
}

/* ==========================================================================
   SCROLL REVEAL ANIMATIONS
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal--visible,
.reveal-left.reveal--visible,
.reveal-right.reveal--visible,
.reveal-scale.reveal--visible {
  opacity: 1;
  transform: none;
}

/* ==========================================================================
   RESPONSIVE: MOBILE (< 768px)
   ========================================================================== */
@media (max-width: 767px) {
  :root {
    --nav-height: 60px;
  }

  /* Container tighter padding on small screens */
  .container {
    padding: 0 var(--space-4);
  }

  /* Nav */
  .nav {
    padding: var(--space-2) 0;
  }

  .nav__links,
  .nav__cta {
    display: none;
  }

  .nav__toggle {
    display: flex;
  }

  .nav__logo-text {
    font-size: 1rem;
  }

  /* Hero */
  .hero {
    padding-top: calc(var(--nav-height) + var(--space-4));
    padding-bottom: var(--space-8);
    min-height: auto;
  }

  .hero__grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
    text-align: center;
  }

  .hero__content {
    align-items: center;
    order: 1;
  }

  .hero__eyebrow {
    text-align: center;
  }

  .hero__title {
    font-size: clamp(1.8rem, 7vw, 2.8rem);
  }

  .hero__subtitle {
    font-size: var(--text-base);
    max-width: 100%;
  }

  .hero__book-wrapper {
    order: 0;
  }

  .hero__book-img {
    max-width: 220px;
    margin: 0 auto;
  }

  .hero__price-amount {
    font-size: 2rem;
  }

  .hero__actions {
    align-items: center;
    width: 100%;
  }

  .hero__actions .btn--large {
    width: 100%;
    max-width: 100%;
    padding: var(--space-4) var(--space-6);
    font-size: var(--text-base);
  }

  .hero__trust {
    text-align: center;
  }

  /* Sections */
  .section {
    padding: clamp(2.5rem, 6vw, 4rem) 0;
  }

  .section__title {
    font-size: clamp(1.4rem, 5vw, 1.8rem);
    margin-bottom: var(--space-8);
  }

  /* Curiosity */
  .curiosity__headline {
    font-size: clamp(1.1rem, 4vw, 1.6rem);
  }

  .curiosity__core {
    font-size: clamp(1.3rem, 5vw, 1.8rem);
  }

  .curiosity__statement {
    font-size: clamp(1.1rem, 3.5vw, 1.4rem);
  }

  /* Quick = Quack */
  .quickquack {
    flex-direction: column;
    gap: 0;
  }

  .quickquack__word {
    font-size: clamp(2.5rem, 16vw, 5rem);
  }

  .quickquack__equals {
    font-size: clamp(1.5rem, 8vw, 3rem);
  }

  .quickquack__explanation {
    padding: 0 var(--space-2);
  }

  .quickquack__explanation .text-lead {
    font-size: var(--text-base);
  }

  /* Problem */
  .problem-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .problem-item {
    padding: var(--space-4);
  }

  /* Humans */
  .brain-ring {
    width: 160px;
    height: 160px;
    margin-bottom: var(--space-8);
  }

  .humans-section__headline {
    font-size: clamp(1.3rem, 5vw, 1.8rem);
  }

  .humans-point {
    font-size: var(--text-base);
  }

  /* Author */
  .author__block p {
    font-size: var(--text-sm);
  }

  /* Discover */
  .discover-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .card {
    padding: var(--space-6);
  }

  /* Framework */
  .framework {
    padding: var(--space-4) 0;
  }

  .framework__step {
    padding: var(--space-4) 0;
  }

  .framework__node {
    width: 44px;
    height: 44px;
  }

  .framework__line {
    height: 24px;
  }

  /* Testimonials */
  .testimonial-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .video-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .testimonial {
    padding: var(--space-6);
  }

  .testimonial__quote {
    font-size: var(--text-base);
  }

  /* AI section */
  .ai-section__argument {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .ai-section__divider {
    width: 100%;
    height: 2px;
    background: linear-gradient(to right, transparent, var(--electric-blue), transparent);
  }

  .ai-section__side {
    padding: var(--space-4);
  }

  /* Numbered list */
  .numbered-item {
    flex-direction: column;
    gap: var(--space-3);
  }

  .numbered-item__number {
    font-size: var(--text-2xl);
  }

  /* Value section */
  .value-section {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-8);
  }

  .value-section__book-img {
    max-width: 180px;
    margin: 0 auto;
  }

  .feature-list {
    align-items: flex-start;
  }

  .feature-list__item {
    font-size: var(--text-sm);
  }

  /* Objections */
  .objection-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .objection-card h3 {
    font-size: var(--text-base);
  }

  /* Audience */
  .audience-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .audience-item {
    padding: var(--space-4);
  }

  /* Offer */
  .offer__headline {
    font-size: clamp(1.3rem, 5vw, 1.8rem);
  }

  .offer__card-inner {
    padding: var(--space-6) var(--space-4);
  }

  .offer__price-amount {
    font-size: clamp(2rem, 8vw, 3rem);
  }

  .offer__cta {
    width: 100%;
    white-space: normal;
  }

  /* FAQ */
  .accordion__trigger {
    font-size: var(--text-base);
    padding: var(--space-4) 0;
  }

  .accordion__content p {
    font-size: var(--text-sm);
  }

  /* Final CTA */
  .final-cta__headline {
    font-size: clamp(1.4rem, 5vw, 2rem);
  }

  .final-cta__book-img {
    max-width: 140px;
  }

  .final-cta__price {
    font-size: clamp(2rem, 8vw, 3rem);
  }

  .final-cta__closing {
    font-size: var(--text-base);
  }

  /* Sticky CTA */
  .sticky-cta {
    display: block;
  }

  .sticky-cta__btn {
    white-space: normal;
    font-size: var(--text-sm);
    padding: var(--space-3) var(--space-4);
  }

  /* Footer */
  .footer__links {
    gap: var(--space-3) var(--space-4);
  }

  .footer__link {
    font-size: var(--text-xs);
  }

  /* Bottom padding for sticky CTA */
  body {
    padding-bottom: 70px;
  }
}

/* Extra small screens (320px) */
@media (max-width: 374px) {
  .container {
    padding: 0 var(--space-3);
  }

  .hero__title {
    font-size: 1.6rem;
  }

  .hero__book-img {
    max-width: 180px;
  }

  .quickquack__word {
    font-size: 2.2rem;
  }

  .quickquack__equals {
    font-size: 1.5rem;
  }

  .btn--large {
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-sm);
  }

  .nav__logo-text {
    font-size: 0.85rem;
  }
}

/* ==========================================================================
   RESPONSIVE: TABLET (768px+)
   ========================================================================== */
@media (min-width: 768px) and (max-width: 1023px) {
  .hero__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }

  .hero__book-img {
    max-width: 300px;
  }

  .discover-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ==========================================================================
   RESPONSIVE: DESKTOP (1024px+)
   ========================================================================== */
@media (min-width: 1024px) {
  .section {
    padding: clamp(5rem, 8vw, 8rem) 0;
  }

  .hero {
    min-height: 100vh;
  }

  .hero__grid {
    gap: var(--space-16);
  }

  .hero__book-img {
    max-width: 380px;
  }

  .discover-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ==========================================================================
   RESPONSIVE: LARGE (1440px+)
   ========================================================================== */
@media (min-width: 1440px) {
  .container {
    max-width: 1280px;
  }
}

/* ==========================================================================
   ACCESSIBILITY: REDUCED MOTION
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal,
  .reveal-left,
  .reveal-right,
  .reveal-scale {
    opacity: 1;
    transform: none;
  }

  .brain-ring__circle {
    animation: none;
  }
}

/* ==========================================================================
   PRINT
   ========================================================================== */
@media print {
  .nav, .sticky-cta, .nav__mobile {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .section {
    padding: 2rem 0;
  }
}