/* ============================================
   PCOI - Portable, Company-Owned Operational Intelligence
   Design System & Styles
   ============================================ */

/* --- CSS Variables --- */
:root {
  --color-bg: #0C0C14;
  --color-bg-alt: #111120;
  --color-bg-card: #16162a;
  --color-bg-card-hover: #1c1c38;
  --color-surface: #1a1a2e;
  --color-border: rgba(255, 255, 255, 0.06);
  --color-border-hover: rgba(255, 255, 255, 0.12);

  --color-text: #E8E8F0;
  --color-text-secondary: #9595B0;
  --color-text-muted: #6565805e;

  --color-accent: #D4A44C;
  --color-accent-glow: rgba(212, 164, 76, 0.15);
  --color-accent-hover: #E0B560;
  --color-accent-dim: rgba(212, 164, 76, 0.08);

  --color-highlight: rgba(212, 164, 76, 0.06);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --container-max: 1200px;
  --container-narrow: 800px;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
}

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

img {
  max-width: 100%;
  display: block;
}

/* --- Container --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 24px;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.nav.scrolled {
  background: rgba(12, 12, 20, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--color-border);
}

.nav-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-text);
}

.logo-mark {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 450;
  color: var(--color-text-secondary);
  transition: color 0.2s ease;
}

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

.nav-links .nav-cta {
  background: var(--color-accent);
  color: var(--color-bg);
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: background 0.2s ease, transform 0.2s ease;
}

.nav-links .nav-cta:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}

/* Mobile menu button */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translateY(5px) translateX(5px);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translateY(-5px) translateX(5px);
}

.nav.menu-open {
  background: var(--color-bg);
}

.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 0;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 8px 24px 24px;
  background: var(--color-bg);
  position: relative;
  z-index: 100;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6);
}

.mobile-menu.active {
  display: flex;
}

.mobile-menu a {
  padding: 14px 0;
  font-size: 1rem;
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border);
  transition: color 0.2s ease;
}

.mobile-menu a:hover {
  color: var(--color-text);
}

.mobile-menu .nav-cta {
  margin-top: 12px;
  background: var(--color-accent);
  color: var(--color-bg);
  padding: 14px 22px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-align: center;
  border: none;
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 70%);
  pointer-events: none;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-accent-dim);
  border: 1px solid rgba(212, 164, 76, 0.15);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 28px;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero-accent {
  color: var(--color-accent);
}

.hero-sub {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  max-width: 520px;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: var(--font-sans);
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-bg);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(212, 164, 76, 0.25);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border-hover);
}

.btn-ghost:hover {
  color: var(--color-text);
  border-color: rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.03);
}

.btn-lg {
  padding: 18px 36px;
  font-size: 1rem;
}

/* --- Hero Visual / Brain Diagram --- */
.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.brain-diagram {
  position: relative;
  width: 420px;
  height: 420px;
}

.brain-core {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 130px;
  height: 130px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-accent-dim), transparent);
  border: 1.5px solid rgba(212, 164, 76, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}

.brain-core span {
  font-size: 0.8rem;
  font-weight: 600;
  text-align: center;
  line-height: 1.3;
  color: var(--color-accent);
}

.brain-pulse {
  position: absolute;
  inset: -10px;
  border-radius: 50%;
  border: 1px solid rgba(212, 164, 76, 0.1);
  animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.15); opacity: 0; }
}

.brain-orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  border-radius: 50%;
  border: 1px solid var(--color-border);
}

.orbit-1 {
  width: 260px;
  height: 260px;
  transform: translate(-50%, -50%);
  animation: orbit-rotate 40s linear infinite;
}

.orbit-2 {
  width: 380px;
  height: 380px;
  transform: translate(-50%, -50%);
  animation: orbit-rotate 60s linear infinite reverse;
}

@keyframes orbit-rotate {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

.orbit-node {
  position: absolute;
  font-size: 0.7rem;
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  white-space: nowrap;
}

/* Inner orbit nodes - evenly spaced at 120° apart */
.orbit-1 .node-1 {
  top: -12px; left: 50%;
  transform: translateX(-50%);
  animation: counter-rotate 40s linear infinite;
}
.orbit-1 .node-2 {
  bottom: 20px; left: -30px;
  animation: counter-rotate 40s linear infinite;
}
.orbit-1 .node-3 {
  bottom: 20px; right: -40px;
  animation: counter-rotate 40s linear infinite;
}

/* Outer orbit nodes - evenly spaced at 120° apart */
.orbit-2 .node-4 {
  top: -12px; left: 50%;
  transform: translateX(-50%);
  animation: counter-rotate-reverse 60s linear infinite;
}
.orbit-2 .node-5 {
  bottom: 55px; left: -30px;
  animation: counter-rotate-reverse 60s linear infinite;
}
.orbit-2 .node-6 {
  bottom: 55px; right: -40px;
  animation: counter-rotate-reverse 60s linear infinite;
}

@keyframes counter-rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(-360deg); }
}

@keyframes counter-rotate-reverse {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* --- Sections --- */
.section {
  padding: 120px 0;
}

.section-dark {
  background: var(--color-bg-alt);
}

.section-header {
  text-align: center;
  max-width: var(--container-narrow);
  margin: 0 auto 64px;
}

.section-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.75rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-header h2 em {
  font-style: normal;
  color: var(--color-accent);
}

.section-desc {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* --- Problem Grid --- */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.problem-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 36px;
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.problem-card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-2px);
}

.problem-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: var(--color-accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--color-accent);
}

.problem-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.problem-card p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* --- Problem Callout --- */
.problem-callout {
  text-align: center;
  position: relative;
  padding: 40px;
}

.callout-line {
  width: 60px;
  height: 2px;
  background: var(--color-accent);
  margin: 0 auto 24px;
}

.problem-callout p {
  font-size: 1.35rem;
  font-weight: 600;
  font-style: italic;
  color: var(--color-text);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.5;
}

/* Chamath callout variant */
.chamath-callout {
  background: transparent;
  border: none;
  border-radius: 0;
  margin-bottom: 0;
}

.chamath-callout .callout-quote {
  font-size: 1.1rem;
  font-weight: 300;
  color: var(--color-text-secondary);
  max-width: 640px;
}

.chamath-callout .callout-attribution {
  font-size: 0.85rem;
  font-style: normal;
  font-weight: 300;
  color: var(--color-text-secondary);
  margin-top: 12px;
}

.chamath-callout .callout-attribution a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s ease;
}

.chamath-callout .callout-attribution a:hover {
  color: var(--color-accent-hover);
}

/* --- How It Works --- */
.how-steps {
  max-width: var(--container-narrow);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.how-step {
  display: flex;
  gap: 32px;
  padding: 40px 0;
  border-bottom: 1px solid var(--color-border);
  align-items: flex-start;
}

.how-step:last-child {
  border-bottom: none;
}

.step-number {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-accent);
  background: var(--color-accent-dim);
  border: 1px solid rgba(212, 164, 76, 0.12);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.step-content p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* --- Learning Curve Section --- */
.curve-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.curve-text .section-label {
  display: inline-block;
  margin-bottom: 16px;
}

.curve-text h2 {
  font-size: clamp(1.6rem, 3vw, 2.25rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
}

.curve-text p {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
}

.curve-stats {
  display: flex;
  gap: 32px;
}

.curve-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-number {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

.curve-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.curve-chart {
  width: 100%;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
}

.curve-chart-inner {
  width: 100%;
}

.curve-svg {
  width: 100%;
  height: auto;
}

/* --- Comparison Table --- */
.comparison-table {
  max-width: 900px;
  margin: 0 auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.comparison-header {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
}

.comparison-header .comparison-col {
  padding: 18px 24px;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-secondary);
}

.comparison-header .comparison-col.highlight {
  color: var(--color-accent);
  background: var(--color-accent-dim);
}

.comparison-row {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  border-bottom: 1px solid var(--color-border);
}

.comparison-row:last-child {
  border-bottom: none;
}

.comparison-col {
  padding: 18px 24px;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.comparison-col.label {
  font-weight: 600;
  color: var(--color-text);
}

.comparison-col.highlight {
  color: var(--color-text);
  background: var(--color-accent-dim);
}

/* --- Principles Grid --- */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.principle {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 36px;
  transition: border-color 0.3s ease;
}

.principle:hover {
  border-color: rgba(212, 164, 76, 0.15);
}

.principle-number {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.principle h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.principle p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* --- Who Section --- */
.who-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.who-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 36px;
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.who-card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-2px);
}

.who-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--color-accent);
}

.who-card p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.who-signals {
  max-width: var(--container-narrow);
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 40px 48px;
}

.who-signals h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--color-accent);
}

.who-signals ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.who-signals li {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  padding-left: 24px;
  position: relative;
}

.who-signals li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  opacity: 0.5;
}

/* --- CTA Section --- */
.section-cta {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.cta-content {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.cta-content h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
}

.cta-content > p {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 48px;
}

.cta-form-wrapper {
  text-align: left;
}

.cta-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group.full-width {
  grid-column: 1 / -1;
}

.form-group label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.form-group input,
.form-group textarea {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 0.95rem;
  color: var(--color-text);
  font-family: var(--font-sans);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: rgba(212, 164, 76, 0.4);
  box-shadow: 0 0 0 3px rgba(212, 164, 76, 0.08);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.cta-form .btn {
  width: 100%;
  margin-top: 8px;
}

.form-note {
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 16px;
}

/* --- Footer --- */
.footer {
  padding: 60px 0 40px;
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 40px;
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-top: 12px;
  line-height: 1.5;
}

.footer-links {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  transition: color 0.2s ease;
}

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

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.footer-bottom p {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* --- Scroll Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-visual {
    order: 2;
  }

  .brain-diagram {
    width: 320px;
    height: 320px;
  }

  .brain-core {
    width: 100px;
    height: 100px;
  }

  .orbit-1 {
    width: 200px;
    height: 200px;
  }

  .orbit-2 {
    width: 300px;
    height: 300px;
  }

  .curve-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .section {
    padding: 80px 0;
  }

  .hero {
    min-height: auto;
    padding: 100px 0 60px;
  }

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

  .hero-sub {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-visual {
    order: 2;
    margin-top: 8px;
  }

  .brain-diagram {
    width: 260px;
    height: 260px;
  }

  .brain-core {
    width: 85px;
    height: 85px;
  }

  .brain-core span {
    font-size: 0.65rem;
  }

  .orbit-1 {
    width: 170px;
    height: 170px;
  }

  .orbit-2 {
    width: 245px;
    height: 245px;
  }

  .orbit-node {
    font-size: 0.55rem;
    padding: 4px 8px;
  }

  .problem-grid {
    grid-template-columns: 1fr;
  }

  .how-step {
    flex-direction: column;
    gap: 16px;
  }

  .comparison-table {
    overflow-x: auto;
  }

  .comparison-header,
  .comparison-row {
    grid-template-columns: 1fr 1fr 1fr;
    min-width: 600px;
  }

  .principles-grid {
    grid-template-columns: 1fr;
  }

  .who-grid {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    gap: 32px;
  }

  .footer-links {
    gap: 20px;
  }

  .curve-stats {
    flex-direction: column;
    gap: 16px;
  }

  .who-signals {
    padding: 32px;
  }

  .cta-form {
    padding: 28px;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero-badge {
    font-size: 0.65rem;
    padding: 6px 12px;
  }

  .btn {
    padding: 12px 22px;
    font-size: 0.9rem;
  }

  .problem-callout p {
    font-size: 1.1rem;
  }

  .chamath-callout .callout-quote {
    font-size: 1rem;
  }
}