/* TruffleTrace marketing site — dependency-free stylesheet.
   Palette: deep forest green, near-white paper, dark ink, warm copper. */

:root {
  --color-forest: #1f3d2f;
  --color-forest-dark: #14291f;
  --color-forest-line: #2c5240;
  --color-paper: #f7f3ea;
  --color-paper-dim: #efe8d8;
  --color-ink: #211d16;
  --color-ink-soft: #4a463c;
  --color-copper: #b8703c;
  --color-copper-dark: #925a2e;
  --color-copper-light: #d99a5b;
  --color-line: #ddd4bf;
  --color-white: #ffffff;

  --font-display: Georgia, 'Iowan Old Style', 'Palatino Linotype', Palatino, serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

  --max-width: 74rem;
  --radius-sm: 4px;
  --radius-md: 8px;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;

  --transition-fast: 160ms ease;
}

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-ink);
  background: var(--color-paper);
}

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

a {
  color: inherit;
}

ul,
ol {
  padding: 0;
  margin: 0;
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  line-height: 1.15;
  margin: 0 0 var(--space-2);
  color: var(--color-forest-dark);
}

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

button {
  font: inherit;
  color: inherit;
}

/* Accessibility helpers */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -3rem;
  left: var(--space-2);
  background: var(--color-forest);
  color: var(--color-paper);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  z-index: 100;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-2);
}

:focus-visible {
  outline: 3px solid var(--color-copper);
  outline-offset: 2px;
}

/* Layout */
.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.section {
  padding: var(--space-5) 0;
}

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

.section--forest {
  background: var(--color-forest);
  color: var(--color-paper);
}

.section--forest h2,
.section--forest h3 {
  color: var(--color-paper);
}

.section-head {
  max-width: 44rem;
  margin: 0 0 var(--space-4);
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-copper-dark);
  margin: 0 0 var(--space-1);
}

.section--forest .eyebrow {
  color: var(--color-copper-light);
}

.lede {
  font-size: 1.125rem;
  color: var(--color-ink-soft);
}

.section--forest .lede {
  color: #dfe6df;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-paper);
  border-bottom: 1px solid var(--color-line);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-2) var(--space-3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--color-forest-dark);
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
}

.brand-mark {
  width: 32px;
  height: 32px;
  flex: none;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-forest-dark);
  position: relative;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: '';
  position: absolute;
  left: 0;
}

.nav-toggle-bars::before {
  top: -6px;
}

.nav-toggle-bars::after {
  top: 6px;
}

.nav-toggle[aria-expanded='true'] .nav-toggle-bars {
  background: transparent;
}

.nav-toggle[aria-expanded='true'] .nav-toggle-bars::before {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded='true'] .nav-toggle-bars::after {
  transform: translateY(-6px) rotate(-45deg);
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.site-nav a {
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-ink-soft);
  padding: 0.35rem 0.1rem;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.site-nav a[aria-current='page'] {
  color: var(--color-forest-dark);
  border-bottom-color: var(--color-copper);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.btn-primary {
  background: var(--color-copper-dark);
  color: var(--color-white);
  border-color: var(--color-copper-dark);
}

.btn-primary:hover {
  background: var(--color-copper-dark);
  border-color: var(--color-copper-dark);
}

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

.btn-secondary:hover {
  background: var(--color-forest-dark);
  color: var(--color-paper);
}

.section--forest .btn-secondary {
  color: var(--color-paper);
  border-color: var(--color-paper);
}

.section--forest .btn-secondary:hover {
  background: var(--color-paper);
  color: var(--color-forest-dark);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

/* Hero */
.hero {
  padding: var(--space-5) 0 var(--space-4);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: var(--space-5);
  align-items: center;
}

.hero-eyebrow {
  color: var(--color-copper-dark);
}

.hero h1 {
  font-size: clamp(2.25rem, 4vw, 3.25rem);
  margin-bottom: var(--space-2);
}

.hero-copy {
  font-size: 1.15rem;
  color: var(--color-ink-soft);
  max-width: 34rem;
}

.hero-media {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-forest);
  aspect-ratio: 4 / 5;
  border: 1px solid var(--color-line);
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-note {
  margin-top: var(--space-2);
  font-size: 0.875rem;
  color: var(--color-ink-soft);
}

/* Feature rows (alternating composition, not repeated cards) */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  align-items: start;
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-line);
}

.feature-row:first-of-type {
  border-top: none;
}

.feature-row--reverse .feature-row-media {
  order: 2;
}

.feature-row-index {
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--color-copper-dark);
  margin-bottom: var(--space-1);
}

.feature-row h3 {
  font-size: 1.5rem;
}

.feature-row-example {
  margin-top: var(--space-2);
  padding: var(--space-2) var(--space-2);
  background: var(--color-paper-dim);
  border-left: 3px solid var(--color-copper);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
}

.feature-row-example strong {
  color: var(--color-forest-dark);
}

.feature-row-media {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-white);
  padding: var(--space-2);
  min-height: 100%;
}

/* Simple stat/summary strip (no fake metrics, structural facts only) */
.fact-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}

.fact {
  border-top: 3px solid var(--color-copper);
  padding-top: var(--space-1);
}

.fact h3 {
  font-size: 1.1rem;
  margin-bottom: 0.35rem;
}

.fact p {
  font-size: 0.95rem;
  color: var(--color-ink-soft);
  margin-bottom: 0;
}

/* Illustrative UI preview: static mock, not a live product surface */
.preview {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-white);
  overflow: hidden;
}

.preview-bar {
  background: var(--color-forest);
  color: var(--color-paper);
  padding: 0.6rem var(--space-2);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
}

.preview-body {
  padding: var(--space-2);
}

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

.preview-item {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  padding: var(--space-1) 0.6rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-paper);
}

.preview-check {
  flex: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid var(--color-forest);
  margin-top: 2px;
}

.preview-check.is-done {
  background: var(--color-forest);
}

.preview-item-body {
  flex: 1;
}

.preview-item-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-ink);
}

.preview-item-meta {
  font-size: 0.875rem;
  color: var(--color-ink-soft);
  margin-top: 0.15rem;
}

.preview-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  background: var(--color-paper-dim);
  color: var(--color-copper-dark);
  border: 1px solid var(--color-copper-light);
  margin-top: 0.35rem;
}

.preview-caption {
  margin-top: var(--space-1);
  font-size: 0.8125rem;
  font-style: italic;
  color: var(--color-ink-soft);
}

/* Steps (how it works) */
.step-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: var(--space-3);
}

.step {
  border-top: 3px solid var(--color-forest);
  padding-top: var(--space-2);
}

.step-number {
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--color-copper);
  display: block;
  margin-bottom: 0.35rem;
}

/* Platform availability */
.platform-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--space-2);
}

.platform-table caption {
  text-align: left;
  font-size: 0.875rem;
  color: var(--color-ink-soft);
  margin-bottom: var(--space-2);
}

.platform-table th,
.platform-table td {
  text-align: left;
  padding: 0.85rem var(--space-2);
  border-bottom: 1px solid var(--color-line);
  font-size: 0.95rem;
}

.platform-table th {
  font-family: var(--font-display);
  color: var(--color-forest-dark);
}

.status-pill {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 700;
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-sm);
}

.status-pill--building {
  background: #eadfc9;
  color: var(--color-copper-dark);
}

.status-pill--planned {
  background: var(--color-paper-dim);
  color: var(--color-ink-soft);
  border: 1px solid var(--color-line);
}

/* FAQ */
.faq-list {
  border-top: 1px solid var(--color-line);
}

.faq-item {
  border-bottom: 1px solid var(--color-line);
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: var(--space-2) 0;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-forest-dark);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--color-copper);
  flex: none;
  transition: transform var(--transition-fast);
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 0 var(--space-2);
  color: var(--color-ink-soft);
  max-width: 42rem;
}

/* Footer */
.site-footer {
  background: var(--color-forest-dark);
  color: #d9e2da;
  padding: var(--space-4) 0 var(--space-3);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: var(--space-3);
  align-items: start;
}

.footer-brand {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
}

.footer-brand p {
  color: #b9c6bb;
  font-size: 0.9rem;
  max-width: 22rem;
}

.footer-inner nav ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-inner nav a {
  text-decoration: none;
  color: #d9e2da;
  font-size: 0.95rem;
}

.footer-inner nav a:hover {
  color: var(--color-copper-light);
}

.footer-note {
  font-size: 0.875rem;
  color: #a9b7ab;
}

.footer-copy {
  font-size: 0.8125rem;
  color: #8fa091;
  margin-bottom: 0;
}

/* Responsive */
@media (max-width: 63.9375em) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-paper);
    border-bottom: 1px solid var(--color-line);
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: max-height var(--transition-fast), visibility var(--transition-fast);
  }

  .site-nav.is-open {
    max-height: 20rem;
    visibility: visible;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: var(--space-2) var(--space-3);
  }

  .site-nav li {
    width: 100%;
  }

  .site-nav a {
    display: block;
    padding: var(--space-2) 0;
    border-bottom: 1px solid var(--color-line);
  }

  .header-inner {
    position: relative;
    flex-wrap: wrap;
  }
}

@media (max-width: 56.25em) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-media {
    aspect-ratio: 16 / 10;
    order: -1;
  }

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

  .feature-row--reverse .feature-row-media {
    order: 0;
  }

  .fact-strip {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 30em) {
  .wrap {
    padding: 0 var(--space-2);
  }

  .btn {
    width: 100%;
  }

  .cta-row {
    flex-direction: column;
  }
}

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

  * ,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}