/* ============================================
   ELEVATE AGENCY — High-signal lander
   ============================================ */

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --navy: #1E3A8A;
  --navy-deep: #0B1437;
  --navy-darker: #060B22;
  --blue: #3B82F6;
  --blue-light: #60A5FA;
  --sky: #93C5FD;
  --sky-50: #EFF6FF;

  --ink: #0F172A;
  --ink-700: #1E293B;
  --ink-500: #475569;
  --ink-400: #64748B;
  --ink-300: #94A3B8;
  --ink-200: #CBD5E1;
  --ink-100: #E2E8F0;
  --ink-50:  #F1F5F9;
  --bg: #FAFBFF;
  --white: #FFFFFF;

  --good: #10B981;
  --good-bg: #ECFDF5;
  --bad: #EF4444;
  --bad-bg: #FEF2F2;

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-pill: 999px;

  --shadow-sm: 0 2px 8px rgba(15,23,42,.05);
  --shadow:    0 8px 32px -8px rgba(15,23,42,.10);
  --shadow-lg: 0 24px 64px -16px rgba(30,58,138,.18);

  --transition: 280ms cubic-bezier(.2,.6,.2,1);
  --transition-slow: 600ms cubic-bezier(.2,.6,.2,1);
}

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; overflow-x: hidden; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-weight: 400;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
img, svg { display: block; max-width: 100%; height: auto; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
  position: relative;
}
.container-narrow {
  max-width: 960px;
}

/* --- Background ambient glow --- */
.bg-fx { position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.bg-glow {
  position: absolute;
  border-radius: 999px;
  filter: blur(100px);
  opacity: .45;
}
.bg-glow-1 {
  width: 700px; height: 700px;
  top: -250px; left: -150px;
  background: radial-gradient(circle, rgba(96,165,250,.55), transparent 65%);
}
.bg-glow-2 {
  width: 550px; height: 550px;
  top: 100px; right: -200px;
  background: radial-gradient(circle, rgba(147,197,253,.45), transparent 65%);
}

/* --- Typography --- */
h1, h2, h3, h4 {
  line-height: 1.15;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--ink);
}
h1 {
  font-size: clamp(1.85rem, 3.9vw, 3rem);
  font-weight: 500;
  letter-spacing: -0.028em;
  line-height: 1.12;
  text-wrap: balance;
}
h2 {
  font-size: clamp(1.55rem, 3vw, 2.25rem);
  font-weight: 500;
  letter-spacing: -0.022em;
  line-height: 1.18;
  text-wrap: balance;
}
h3 {
  font-size: clamp(1.05rem, 1.6vw, 1.175rem);
  font-weight: 600;
  letter-spacing: -0.015em;
}
p { line-height: 1.7; }
strong, b { font-weight: 600; color: var(--ink); }

.highlight { color: var(--navy); font-weight: 600; }

/* --- Section header --- */
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 80px;
}
.section-sub {
  font-size: 1.075rem;
  color: var(--ink-500);
  margin-top: 18px;
  line-height: 1.7;
}

/* --- Badge --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--sky-50);
  color: var(--navy);
  border: 1px solid rgba(59,130,246,.18);
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 22px;
}
.badge-on-dark {
  background: rgba(255,255,255,.06);
  color: var(--sky);
  border: 1px solid rgba(255,255,255,.15);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}
.btn .arrow { transition: transform var(--transition); font-weight: 700; }
.btn:hover .arrow { transform: translateX(3px); }
.btn-lg { padding: 18px 32px; font-size: 16px; }
.btn-full { width: 100%; }

.btn-primary {
  background: linear-gradient(180deg, var(--blue) 0%, var(--navy) 100%);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(30,58,138,.30), inset 0 1px 0 rgba(255,255,255,.18);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 32px rgba(30,58,138,.40), inset 0 1px 0 rgba(255,255,255,.25);
}
.btn-primary::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.20), transparent);
  transition: left .6s;
  pointer-events: none;
}
.btn-primary:hover::before { left: 100%; }

/* --- Navbar --- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 18px 0;
  background: rgba(250,251,255,.80);
  backdrop-filter: saturate(150%) blur(20px);
  -webkit-backdrop-filter: saturate(150%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition);
}
.navbar.scrolled {
  border-bottom-color: var(--ink-100);
  padding: 12px 0;
}
.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo img { height: 32px; width: auto; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}
.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-500);
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--navy); }
.nav-cta { padding: 9px 18px; font-size: 14px; }
.nav-links a.btn-primary { color: var(--white); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: 0;
  padding: 6px;
}
.hamburger span {
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: all var(--transition);
}

/* --- Hero (minimal, signal-only) --- */
.hero {
  padding: 200px 0 160px;
  position: relative;
  z-index: 1;
}
.hero-content {
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 16px;
  background: rgba(255,255,255,.65);
  border: 1px solid var(--ink-100);
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-700);
  margin-bottom: 36px;
  backdrop-filter: blur(8px);
}
.eyebrow-dot {
  width: 7px; height: 7px;
  background: var(--good);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(16,185,129,.18);
  animation: pulse 2.2s infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .5; } }

.hero h1 { margin-bottom: 28px; }
.hero-sub {
  font-size: clamp(1.075rem, 1.4vw, 1.20rem);
  color: var(--ink-500);
  max-width: 600px;
  margin: 0 auto 44px;
  line-height: 1.65;
}
.hero-sub strong { color: var(--ink-700); font-weight: 600; }

.hero-cta { margin-bottom: 36px; }
.hero-trust {
  font-size: 13.5px;
  color: var(--ink-400);
  letter-spacing: 0.01em;
  font-weight: 500;
}

/* --- Thesis --- */
.thesis-section {
  padding: 140px 0;
  position: relative;
  z-index: 1;
}
.thesis-body {
  max-width: 680px;
  margin: 0 auto 80px;
  text-align: center;
}
.thesis-body p {
  font-size: 1.075rem;
  color: var(--ink-500);
  line-height: 1.8;
  margin-bottom: 20px;
}
.thesis-body p:last-child { margin-bottom: 0; }

.thesis-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--ink-100);
  border-bottom: 1px solid var(--ink-100);
  padding: 48px 0;
  max-width: 880px;
  margin: 0 auto;
}
.thesis-stat {
  text-align: center;
  padding: 0 24px;
  border-right: 1px solid var(--ink-100);
}
.thesis-stat:last-child { border-right: 0; }
.thesis-stat-num {
  font-size: clamp(2.25rem, 3.5vw, 2.75rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--navy);
  margin-bottom: 8px;
  font-feature-settings: 'tnum';
}
.thesis-stat-label {
  font-size: 14px;
  color: var(--ink-500);
  font-weight: 500;
  line-height: 1.4;
}

/* --- Stack section --- */
.stack-section {
  padding: 140px 0;
  position: relative;
  z-index: 1;
}
.stack-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.stack-card {
  background: var(--white);
  border: 1px solid var(--ink-100);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  transition: all var(--transition);
}
.stack-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: rgba(59,130,246,.20);
}
.stack-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--blue);
  margin-bottom: 20px;
}
.stack-card h3 {
  margin-bottom: 12px;
  font-size: 1.20rem;
}
.stack-card p {
  color: var(--ink-500);
  font-size: 15px;
  line-height: 1.65;
}

/* --- Steps section --- */
.steps-section {
  padding: 140px 0;
  position: relative;
  z-index: 1;
}
.steps-rail {
  max-width: 760px;
  margin: 0 auto;
  position: relative;
}
.steps-rail::before {
  content: '';
  position: absolute;
  left: 28px;
  top: 28px;
  bottom: 28px;
  width: 1px;
  background: linear-gradient(180deg, var(--blue), var(--sky), transparent);
  opacity: .25;
}
.step-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 32px;
  align-items: start;
  margin-bottom: 40px;
}
.step-row:last-child { margin-bottom: 0; }
.step-marker { position: relative; }
.step-num {
  width: 56px;
  height: 56px;
  background: var(--white);
  color: var(--navy);
  border: 1px solid var(--ink-100);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  font-weight: 600;
  position: relative;
  z-index: 1;
  box-shadow: var(--shadow-sm);
}
.step-label {
  margin-top: 10px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--ink-400);
  text-transform: uppercase;
}
.step-content {
  padding-top: 6px;
}
.step-content h3 {
  margin-bottom: 10px;
  font-size: 1.20rem;
}
.step-content p {
  color: var(--ink-500);
  font-size: 15px;
  line-height: 1.7;
}

/* --- Versus section --- */
.versus-section {
  padding: 140px 0;
  background: linear-gradient(180deg, var(--navy-deep), var(--navy-darker));
  color: var(--white);
  position: relative;
  z-index: 1;
  overflow: hidden;
}
.versus-section::before {
  content: '';
  position: absolute;
  top: -30%; left: 50%;
  width: 800px; height: 800px;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(96,165,250,.10), transparent 60%);
  pointer-events: none;
}
.versus-section .section-header h2 { color: var(--white); }
.versus-section .section-sub { color: rgba(255,255,255,.62); }

.compare-table {
  max-width: 880px;
  margin: 0 auto;
  border: 1px solid rgba(255,255,255,.10);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(255,255,255,.02);
  backdrop-filter: blur(8px);
  position: relative;
}
.compare-row {
  display: grid;
  grid-template-columns: 1fr 1.2fr 1.2fr;
  border-top: 1px solid rgba(255,255,255,.07);
}
.compare-row:first-child { border-top: 0; }
.compare-cell {
  padding: 20px 24px;
  font-size: 14.5px;
  font-weight: 400;
  color: rgba(255,255,255,.78);
  display: flex;
  align-items: center;
  line-height: 1.5;
}
.compare-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sky);
}
.compare-header .compare-cell {
  background: rgba(255,255,255,.03);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--white);
  padding: 18px 24px;
}
.compare-col-bad { color: #FCA5A5; }
.compare-col-good { color: #86EFAC; }
.compare-good {
  color: #86EFAC;
  font-weight: 500;
}

/* --- Results section --- */
.results-section {
  padding: 140px 0;
  position: relative;
  z-index: 1;
}
.results-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 64px;
}
.result-card {
  background: var(--white);
  border: 1px solid var(--ink-100);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
}
.result-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.result-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}
.result-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-weight: 600;
  font-size: 14px;
  flex-shrink: 0;
}
.result-name { font-weight: 600; font-size: 15px; color: var(--ink); }
.result-meta { font-size: 13px; color: var(--ink-400); }
.result-numbers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding: 18px 0;
  border-top: 1px dashed var(--ink-100);
  border-bottom: 1px dashed var(--ink-100);
  margin-bottom: 20px;
}
.result-num-block { text-align: center; }
.result-num {
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--navy);
  font-feature-settings: 'tnum';
}
.result-num-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  color: var(--ink-400);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-top: 4px;
}
.result-quote {
  font-size: 14.5px;
  color: var(--ink-700);
  line-height: 1.65;
  font-style: italic;
  flex: 1;
}

.results-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--ink-100);
  border-bottom: 1px solid var(--ink-100);
  padding: 40px 0;
  max-width: 880px;
  margin: 0 auto;
}
.results-bar-item {
  text-align: center;
  border-right: 1px solid var(--ink-100);
  padding: 0 16px;
}
.results-bar-item:last-child { border-right: 0; }
.results-bar-num {
  font-size: clamp(1.75rem, 2.6vw, 2.15rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--navy);
  font-feature-settings: 'tnum';
}
.results-bar-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--ink-400);
  text-transform: uppercase;
  margin-top: 6px;
}

/* --- Fit (yes/no) --- */
.fit-section {
  padding: 60px 0 140px;
  position: relative;
  z-index: 1;
}
.fit-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 880px;
  margin: 0 auto;
}
.fit-col {
  background: var(--white);
  border: 1px solid var(--ink-100);
  border-radius: var(--radius-lg);
  padding: 36px 36px;
}
.fit-col-yes { border-color: rgba(16,185,129,.22); }
.fit-col-no  { border-color: rgba(239,68,68,.18); }
.fit-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}
.fit-icon-wrap {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.fit-icon-yes { background: var(--good-bg); color: var(--good); }
.fit-icon-no  { background: var(--bad-bg);  color: var(--bad);  }
.fit-list { list-style: none; }
.fit-list li {
  padding: 14px 0;
  border-top: 1px dashed var(--ink-100);
  color: var(--ink-700);
  font-size: 14.5px;
  line-height: 1.55;
}
.fit-list li:first-child { border-top: 0; padding-top: 0; }
.fit-list li:last-child  { padding-bottom: 0; }

/* --- FAQ --- */
.faq-section {
  padding: 140px 0;
  position: relative;
  z-index: 1;
}
.faq-list {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.faq-item {
  background: var(--white);
  border: 1px solid var(--ink-100);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
}
.faq-item.is-open {
  border-color: rgba(59,130,246,.30);
  box-shadow: var(--shadow-sm);
}
.faq-question {
  width: 100%;
  padding: 22px 26px;
  background: transparent;
  border: 0;
  text-align: left;
  font-size: 15.5px;
  font-weight: 500;
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
}
.faq-question:hover { color: var(--navy); }
.faq-chevron {
  width: 18px;
  height: 18px;
  color: var(--ink-400);
  transition: transform var(--transition);
  flex-shrink: 0;
}
.faq-item.is-open .faq-chevron { transform: rotate(180deg); color: var(--blue); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}
.faq-answer-inner {
  padding: 0 26px 24px;
  color: var(--ink-500);
  font-size: 14.5px;
  line-height: 1.75;
}
.faq-item.is-open .faq-answer { max-height: 600px; }

/* --- Book --- */
.book-section {
  padding: 140px 0;
  background: linear-gradient(180deg, var(--navy-deep), var(--navy-darker));
  position: relative;
  z-index: 1;
  overflow: hidden;
}
.book-section::before {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  width: 800px; height: 600px;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(96,165,250,.12), transparent 60%);
  pointer-events: none;
}
.book-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.10);
  border-radius: var(--radius-xl);
  padding: 64px;
  backdrop-filter: blur(8px);
  position: relative;
}
.book-left h2 { color: var(--white); margin-bottom: 18px; }
.book-sub { color: rgba(255,255,255,.68); margin-bottom: 32px; line-height: 1.7; font-size: 15px; }
.book-checks { list-style: none; display: flex; flex-direction: column; gap: 14px; }
.book-checks li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: rgba(255,255,255,.85);
  font-size: 14.5px;
  font-weight: 500;
}
.book-checks li svg {
  color: var(--good);
  flex-shrink: 0;
  margin-top: 2px;
}
.book-form { display: flex; flex-direction: column; gap: 16px; }
.form-row { display: flex; flex-direction: column; gap: 8px; }
.form-row label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sky);
}
.form-row input,
.form-row select {
  padding: 13px 15px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius);
  color: var(--white);
  font-family: inherit;
  font-size: 15px;
  transition: all var(--transition);
}
.form-row input::placeholder { color: rgba(255,255,255,.35); }
.form-row input:focus,
.form-row select:focus {
  outline: none;
  border-color: var(--blue-light);
  background: rgba(255,255,255,.08);
  box-shadow: 0 0 0 4px rgba(59,130,246,.18);
}
.form-row select option { background: var(--navy-deep); color: var(--white); }

/* --- Footer --- */
.footer {
  padding: 64px 0 32px;
  background: var(--navy-darker);
  color: rgba(255,255,255,.5);
  position: relative;
  z-index: 1;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,.08);
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.footer-logo img { height: 32px; }
.footer-links {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
}
.footer-links a {
  font-size: 14px;
  color: rgba(255,255,255,.62);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--white); }
.footer-disclaimer p {
  font-size: 12.5px;
  color: rgba(255,255,255,.42);
  line-height: 1.7;
  max-width: 760px;
  margin-bottom: 12px;
}
.footer-disclaimer strong { color: rgba(255,255,255,.62); font-weight: 600; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 28px;
  border-top: 1px solid rgba(255,255,255,.08);
  font-size: 13px;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-legal { display: flex; gap: 20px; }
.footer-legal a { color: rgba(255,255,255,.5); }
.footer-legal a:hover { color: var(--white); }

/* --- Sticky mobile CTA --- */
.sticky-cta {
  display: none;
  position: fixed;
  bottom: 16px;
  left: 16px;
  right: 16px;
  z-index: 90;
}
.sticky-cta .btn {
  width: 100%;
  box-shadow: 0 12px 32px rgba(30,58,138,.40);
}

/* --- Scroll reveal --- */
.fade-in-up {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 700ms cubic-bezier(.2,.6,.2,1), transform 700ms cubic-bezier(.2,.6,.2,1);
}
.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 980px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .nav-links.open {
    display: flex;
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 16px;
    background: var(--white);
    border-bottom: 1px solid var(--ink-100);
    box-shadow: var(--shadow);
  }
  .nav-links.open li { width: 100%; }
  .nav-links.open a { padding: 12px 16px; display: block; }
  .nav-links.open a.btn-primary { text-align: center; margin-top: 8px; }

  .hero { padding: 160px 0 120px; }
  .thesis-section,
  .stack-section,
  .steps-section,
  .versus-section,
  .results-section,
  .faq-section,
  .book-section { padding: 100px 0; }
  .fit-section { padding: 40px 0 100px; }

  .stack-grid { grid-template-columns: 1fr; }
  .results-grid { grid-template-columns: 1fr; }
  .thesis-stats {
    grid-template-columns: 1fr;
    padding: 28px 0;
  }
  .thesis-stat {
    border-right: 0;
    border-bottom: 1px solid var(--ink-100);
    padding: 24px 0;
  }
  .thesis-stat:last-child { border-bottom: 0; }
  .results-bar { grid-template-columns: 1fr 1fr; gap: 24px; padding: 28px 0; }
  .results-bar-item { border-right: 0; padding: 8px 0; }
  .results-bar-item:nth-child(odd) { border-right: 1px solid var(--ink-100); }
  .fit-grid { grid-template-columns: 1fr; }
  .book-card { grid-template-columns: 1fr; gap: 40px; padding: 40px 28px; }
  .step-row { grid-template-columns: 90px 1fr; gap: 20px; }
  .steps-rail::before { left: 22px; }
  .step-num { width: 44px; height: 44px; font-size: 12px; }
  .compare-row { grid-template-columns: 1fr; }
  .compare-cell { padding: 14px 18px; }
  .compare-label { background: rgba(255,255,255,.04); font-size: 10.5px; }

  .sticky-cta { display: block; }
}

@media (max-width: 640px) {
  .container { padding: 0 22px; }
  .hero { padding: 140px 0 96px; }
  .thesis-section,
  .stack-section,
  .steps-section,
  .versus-section,
  .results-section,
  .faq-section,
  .book-section { padding: 80px 0; }
  .section-header { margin-bottom: 56px; }
  .stack-card { padding: 32px 26px; }
  .fit-col { padding: 28px 26px; }
  .step-row { grid-template-columns: 1fr; gap: 12px; }
  .step-marker { display: flex; align-items: center; gap: 14px; }
  .step-label { margin-top: 0; }
  .steps-rail::before { display: none; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 20px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}