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

:root {
  --color-dark: #0a0a0b;
  --color-charcoal: #1a1a1c;
  --color-gray: #505052;
  --color-light-gray: #a8a8aa;
  --color-off-white: #f4f4f5;
  --color-white: #ffffff;
  --color-teal: #2dd4bf;
  --color-amber: #fbbf24;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  --spacing-xxl: 8rem;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--color-dark);
  background: var(--color-white);
  overflow-x: hidden;
}

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-off-white);
  padding: var(--spacing-sm) var(--spacing-md);
  z-index: 1000;
}

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  max-width: 1400px;
  margin: 0 auto;
}

nav a {
  text-decoration: none;
  color: var(--color-dark);
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  font-weight: 500;
  transition: color 0.2s;
}

nav a:hover {
  color: var(--color-teal);
}

main {
  margin-top: 4rem;
  padding: var(--spacing-lg) var(--spacing-md);
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
}

h1 {
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--spacing-md);
  color: var(--color-dark);
}

h2 {
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  color: var(--color-charcoal);
}

h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 600;
  line-height: 1.3;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  color: var(--color-charcoal);
}

p {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--color-gray);
  margin-bottom: var(--spacing-md);
  max-width: 65ch;
}

.lead {
  font-size: 1.5rem;
  line-height: 1.6;
  color: var(--color-charcoal);
  font-weight: 400;
  margin-bottom: var(--spacing-lg);
  max-width: 55ch;
}

.highlight {
  background: linear-gradient(to right, var(--color-teal), var(--color-amber));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 600;
}

.hero {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--spacing-xl) 0;
}

.section {
  padding: var(--spacing-lg) 0;
}

.section-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

@media (min-width: 768px) {
  .section-split {
    grid-template-columns: 1fr 1fr;
  }

  .section-split.asymmetric {
    grid-template-columns: 2fr 1fr;
  }

  .section-split.asymmetric-reverse {
    grid-template-columns: 1fr 2fr;
  }
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 4px;
}

.image-wrapper {
  margin: var(--spacing-xl) 0;
  position: relative;
}

.image-full {
  width: 100%;
  max-width: 100%;
}

.image-offset {
  margin-left: var(--spacing-lg);
}

.callout {
  background: var(--color-off-white);
  padding: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
  border-left: 4px solid var(--color-teal);
}

.callout p {
  font-size: 1.25rem;
  color: var(--color-charcoal);
  max-width: 100%;
  margin: 0;
}

.quote {
  font-size: 1.75rem;
  line-height: 1.5;
  font-weight: 300;
  font-style: italic;
  color: var(--color-charcoal);
  margin: var(--spacing-xl) 0;
  padding-left: var(--spacing-lg);
  border-left: 3px solid var(--color-gray);
  max-width: 50ch;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.card {
  padding: var(--spacing-md);
  background: var(--color-white);
  border: 1px solid var(--color-off-white);
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.card h3 {
  margin-top: 0;
  font-size: 1.25rem;
}

.card p {
  font-size: 1rem;
  color: var(--color-gray);
}

.timeline {
  position: relative;
  padding-left: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-teal), var(--color-amber));
}

.timeline-item {
  position: relative;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
}

.timeline-marker {
  position: absolute;
  left: calc(-1 * var(--spacing-lg) - 6px);
  top: 0;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-teal);
  border: 3px solid var(--color-white);
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

@media (min-width: 768px) {
  .comparison-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.comparison-item {
  padding: var(--spacing-md);
  border: 2px solid var(--color-off-white);
}

.comparison-item h3 {
  margin-top: 0;
}

.tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--color-charcoal);
  color: var(--color-white);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.tag.primary {
  background: var(--color-teal);
}

.tag.secondary {
  background: var(--color-amber);
  color: var(--color-dark);
}

.divider {
  height: 1px;
  background: var(--color-off-white);
  margin: var(--spacing-xl) 0;
}

.divider-thick {
  height: 4px;
  background: linear-gradient(to right, var(--color-teal), var(--color-amber));
  margin: var(--spacing-xxl) 0;
}

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

.text-large {
  font-size: 1.5rem;
  line-height: 1.6;
}

.spacer {
  height: var(--spacing-xl);
}

footer {
  margin-top: var(--spacing-xxl);
  padding: var(--spacing-lg) var(--spacing-md);
  border-top: 1px solid var(--color-off-white);
  text-align: center;
  color: var(--color-light-gray);
  font-size: 0.875rem;
}

.layered-section {
  background: var(--color-off-white);
  padding: var(--spacing-xl) var(--spacing-lg);
  margin: var(--spacing-xl) calc(-1 * var(--spacing-md));
}

ul {
  list-style: none;
  margin: var(--spacing-md) 0;
}

ul li {
  position: relative;
  padding-left: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--color-gray);
}

ul li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-teal);
  font-weight: 600;
}

a {
  color: var(--color-teal);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--color-amber);
}