/* Usonian palette: Taliesin cream, Cherokee red, walnut, sage, copper */

:root {
  --cream: #f4ede4;
  --cream-deep: #e8dfd2;
  --cream-shadow: #ddd2c4;
  --walnut: #2c2419;
  --walnut-soft: #4a4035;
  --cherokee: #9b3a2e;
  --cherokee-deep: #7a2e24;
  --sage: #4a5d4a;
  --sage-light: #6b7f62;
  --copper: #b87333;
  --line: rgba(44, 36, 25, 0.12);

  --font-display: "Cormorant Garamond", "Georgia", serif;
  --font-body: "Source Sans 3", system-ui, sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.75rem;
  --space-lg: 3rem;
  --space-xl: 5rem;
  --space-2xl: 7rem;

  --max-width: 72rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--walnut-soft);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: rgba(155, 58, 46, 0.18);
  color: var(--walnut);
}

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

a {
  color: var(--cherokee);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color 0.2s var(--ease);
}

a:hover {
  color: var(--cherokee-deep);
}

/* Layout */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) clamp(1.25rem, 4vw, 2.5rem);
  background: rgba(244, 237, 228, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.site-logo {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--walnut);
  text-decoration: none;
}

.site-nav {
  display: flex;
  gap: clamp(1rem, 3vw, 2rem);
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-nav a {
  color: var(--walnut-soft);
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--cherokee);
}

main {
  padding-top: 4.5rem;
}

.section {
  padding: var(--space-xl) clamp(1.25rem, 4vw, 2.5rem);
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-label {
  display: block;
  margin-bottom: var(--space-sm);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sage);
}

.section-title {
  margin: 0 0 var(--space-md);
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 500;
  line-height: 1.15;
  color: var(--walnut);
}

.section-lead {
  max-width: 42rem;
  margin: 0 0 var(--space-lg);
  font-size: 1.125rem;
  color: var(--walnut-soft);
}

.section-copy {
  max-width: 42rem;
}

.section-copy p {
  margin: 0 0 var(--space-md);
  font-size: 1.125rem;
  color: var(--walnut-soft);
}

.section-copy p:last-child {
  margin-bottom: 0;
}

/* Hero */

.hero {
  position: relative;
  min-height: calc(100vh - 4.5rem);
  display: flex;
  align-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.hero-pattern {
  position: absolute;
  inset: 0;
  background-image: url("assets/pattern.svg");
  background-size: 480px 480px;
  background-position: center top;
  opacity: 0.35;
  mask-image: linear-gradient(to bottom, black 0%, transparent 85%);
  pointer-events: none;
}

.hero-horizon {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 28%;
  height: 3px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--cherokee) 8%,
    var(--cherokee) 92%,
    transparent 100%
  );
  opacity: 0.55;
}

.hero-horizon::after {
  content: "";
  position: absolute;
  left: 8%;
  right: 8%;
  top: 10px;
  height: 1px;
  background: var(--sage);
  opacity: 0.35;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-2xl) clamp(1.25rem, 4vw, 2.5rem);
}

.hero-eyebrow {
  margin: 0 0 var(--space-md);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--sage);
}

.hero-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(4.5rem, 14vw, 9rem);
  font-weight: 400;
  line-height: 0.92;
  letter-spacing: -0.02em;
  color: var(--walnut);
}

.hero-subhead {
  max-width: 36rem;
  margin: var(--space-md) 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.8vw, 1.85rem);
  font-weight: 500;
  line-height: 1.35;
  color: var(--walnut);
}

.hero-copy {
  max-width: 38rem;
  margin: var(--space-md) 0 0;
  font-size: 1.125rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.5rem;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid transparent;
  transition:
    background 0.25s var(--ease),
    color 0.25s var(--ease),
    border-color 0.25s var(--ease),
    transform 0.25s var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--cherokee);
  color: var(--cream);
  border-color: var(--cherokee);
}

.btn-primary:hover {
  background: var(--cherokee-deep);
  border-color: var(--cherokee-deep);
  color: var(--cream);
}

.btn-secondary {
  background: transparent;
  color: var(--walnut);
  border-color: var(--walnut);
}

.btn-secondary:hover {
  background: var(--walnut);
  color: var(--cream);
  border-color: var(--walnut);
}

/* Three ideas */

.triad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: var(--space-lg);
  background: var(--line);
  border: 1px solid var(--line);
}

.triad-item {
  padding: var(--space-md);
  background: var(--cream);
}

.triad-num {
  display: block;
  margin-bottom: var(--space-xs);
  font-family: var(--font-display);
  font-size: 2rem;
  line-height: 1;
  color: var(--cherokee);
  opacity: 0.85;
}

.triad-item p {
  margin: 0;
  font-size: 0.975rem;
  color: var(--walnut-soft);
}

/* Category breakdown */

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-md);
}

.category-card {
  padding: var(--space-md);
  background: var(--cream-deep);
  border-left: 3px solid var(--cherokee);
}

.category-card h3 {
  margin: 0 0 var(--space-xs);
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--walnut);
}

.category-card p {
  margin: 0;
  font-size: 0.975rem;
}

/* Behavioral strategy examples */

.strategy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.strategy-card {
  padding: var(--space-md);
  background: var(--cream);
  border-left: 3px solid var(--sage);
}

.strategy-card h3 {
  margin: 0 0 var(--space-xs);
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--walnut);
}

.strategy-card p {
  margin: 0;
  font-size: 0.9375rem;
}

/* How it works / lifecycle */

.lifecycle {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0;
  padding: var(--space-md);
  background: var(--cream-deep);
  border: 1px solid var(--line);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--walnut);
}

.lifecycle-step {
  padding: 0.35rem 0.65rem;
  background: var(--cream);
  border: 1px solid var(--line);
}

.lifecycle-arrow {
  color: var(--copper);
  font-size: 0.75rem;
  padding: 0 0.15rem;
}

.lifecycle-arrow--return {
  color: var(--sage);
  font-size: 1rem;
  padding-left: 0.35rem;
}

.lifecycle + .section-copy {
  margin-top: var(--space-md);
}

.agent-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-sm);
  margin-top: var(--space-md);
  padding: 0;
  list-style: none;
}

.agent-list li {
  padding: var(--space-sm);
  font-size: 0.9375rem;
  border-bottom: 2px solid var(--sage);
  background: var(--cream);
}

.agent-list strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--walnut);
}

/* Comparison table */

.compare-wrap {
  overflow-x: auto;
  margin-top: var(--space-md);
  border: 1px solid var(--line);
}

.compare {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.compare th,
.compare td {
  padding: var(--space-sm) var(--space-md);
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.compare th {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--sage);
  background: var(--cream-deep);
}

.compare tr:last-child td {
  border-bottom: none;
}

.compare td:first-child {
  font-weight: 600;
  color: var(--walnut);
  white-space: nowrap;
}

/* Trust */

.trust-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-md);
}

.trust-card {
  padding: var(--space-md);
  border: 1px solid var(--line);
  background: var(--cream);
}

.trust-card h3 {
  margin: 0 0 var(--space-xs);
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--walnut);
}

.trust-card p {
  margin: 0;
  font-size: 0.975rem;
}

/* Status band */

.status-band {
  padding: var(--space-lg) clamp(1.25rem, 4vw, 2.5rem);
  background: var(--walnut);
  color: var(--cream-shadow);
}

.status-band-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.status-band p {
  margin: 0;
  max-width: 36rem;
  font-size: 1rem;
}

.status-band .btn-primary {
  background: var(--copper);
  border-color: var(--copper);
}

.status-band .btn-primary:hover {
  background: #a6652d;
  border-color: #a6652d;
}

.status-label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--copper);
}

/* Footer */

.site-footer {
  padding: var(--space-lg) clamp(1.25rem, 4vw, 2.5rem);
  border-top: 1px solid var(--line);
}

.site-footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-sm);
  font-size: 0.875rem;
}

.site-footer a {
  color: var(--walnut-soft);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--cherokee);
}

/* Reveal animation */

.reveal {
  opacity: 0;
  transform: translateY(1.25rem);
  transition:
    opacity 0.7s var(--ease),
    transform 0.7s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

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

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

  .hero-horizon {
    bottom: 22%;
  }

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

  .lifecycle-arrow {
    align-self: center;
    transform: rotate(90deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .btn:hover {
    transform: none;
  }
}