:root {
  --page: #0d0d0d;
  --card: #1a1a19;
  --ink: #ffffff;
  --ink-soft: #c3c2b7;
  --muted: #898781;
  --hairline: rgba(255, 255, 255, 0.10);
  --accent: #3987e5;
  --accent-ink: #eaf2fd;
  --eco: #008300;
  --eco-ink: #b9f6b9;
  --radius: 14px;
  --measure: 68ch;
}

@media (prefers-color-scheme: light) {
  :root {
    --page: #f9f9f7;
    --card: #fcfcfb;
    --ink: #0b0b0b;
    --ink-soft: #52514e;
    --muted: #7a7972;
    --hairline: rgba(0, 0, 0, 0.10);
    --accent: #1f66c1;
    --accent-ink: #0b2e5c;
    --eco: #006b00;
    --eco-ink: #0f4d0f;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--ink-soft);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  max-width: 100%;
}

a {
  color: var(--accent);
  text-decoration-color: rgba(57, 135, 229, 0.4);
  text-underline-offset: 3px;
}

a:hover,
a:focus-visible {
  text-decoration-color: var(--accent);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

h1, h2, h3 {
  color: var(--ink);
  font-weight: 650;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

p {
  max-width: var(--measure);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 0.75em 1.25em;
  border-radius: 0 0 8px 0;
  z-index: 100;
}

.skip-link:focus {
  left: 0;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1.5rem;
  background: color-mix(in srgb, var(--page) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--hairline);
  flex-wrap: wrap;
}

.site-header .brand {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  color: var(--ink);
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
}

.site-header .brand .dot {
  color: var(--eco);
}

.site-nav {
  display: flex;
  gap: 1.1rem;
  flex-wrap: wrap;
  font-size: 0.92rem;
}

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

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--accent);
}

/* Layout */

main {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: 5rem 0;
  border-bottom: 1px solid var(--hairline);
}

section:last-of-type {
  border-bottom: none;
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.9rem;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  margin: 0 0 1.1rem;
}

h3 {
  font-size: 1.15rem;
  margin: 0 0 0.6rem;
}

section > p:first-of-type {
  margin-top: 0;
}

/* Hero */

.hero {
  padding-top: 4.5rem;
  border-bottom: 1px solid var(--hairline);
}

.hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  margin: 0 0 1.2rem;
  max-width: 18ch;
}

.hero .tese {
  font-size: 1.2rem;
  color: var(--ink-soft);
  max-width: var(--measure);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-size: 0.78rem;
  padding: 0.3em 0.75em;
  border-radius: 999px;
  border: 1px solid var(--hairline);
  color: var(--eco-ink);
  background: color-mix(in srgb, var(--eco) 14%, transparent);
  margin-bottom: 1.5rem;
}

.badge .pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--eco);
  box-shadow: 0 0 0 0 rgba(0, 131, 0, 0.6);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(0, 131, 0, 0.55); }
  70% { box-shadow: 0 0 0 8px rgba(0, 131, 0, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 131, 0, 0); }
}

.cta-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2.2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.85em 1.4em;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.98rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

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

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

.btn-primary:hover,
.btn-primary:focus-visible {
  background: #2c74cc;
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--hairline);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

/* Ecosystem callout */

.ecosystem-callout {
  margin: 2.5rem 0 0;
  padding: 1.3rem 1.5rem;
  background: var(--card);
  border: 1px solid var(--hairline);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  font-size: 0.98rem;
  color: var(--ink-soft);
  overflow-wrap: anywhere;
}

.ecosystem-callout strong {
  color: var(--ink);
}

/* Diagram */

.diagram-wrap {
  margin: 2.5rem 0;
  padding: 1.5rem;
  background: var(--card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow-x: auto;
}

.diagram-wrap svg {
  display: block;
  width: 100%;
  height: auto;
  min-width: 480px;
}

.diagram-caption {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0.8rem 0 0;
}

/* Cards / grids */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.1rem;
  margin-top: 1.8rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.card h3 {
  display: flex;
  align-items: center;
  gap: 0.5em;
}

.card p {
  margin: 0;
  font-size: 0.95rem;
}

.card .tag {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.card.eco .tag {
  color: var(--eco-ink);
}

/* Facts table */

.facts {
  margin-top: 1.8rem;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
}

.fact-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem 1.3rem;
  border-bottom: 1px solid var(--hairline);
  background: var(--card);
}

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

.fact-row .fact-text {
  font-size: 0.95rem;
  color: var(--ink-soft);
  overflow-wrap: anywhere;
}

.fact-row .fact-source {
  font-size: 0.78rem;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.fact-row .fact-source a {
  color: var(--muted);
}

.fact-row .fact-source a:hover {
  color: var(--accent);
}

/* Roadmap */

.roadmap {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.phase {
  background: var(--card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 1.8rem;
}

.phase header {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.phase h3 {
  margin: 0;
}

.phase ul {
  margin: 0;
  padding-left: 1.2rem;
  font-size: 0.93rem;
}

.phase li {
  margin-bottom: 0.5rem;
}

.badge-live {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.25em 0.6em;
  border-radius: 999px;
  background: color-mix(in srgb, var(--eco) 16%, transparent);
  color: var(--eco-ink);
  border: 1px solid color-mix(in srgb, var(--eco) 40%, transparent);
}

.badge-live .pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--eco);
  animation: pulse 2s infinite;
}

/* Governance steps */

.steps {
  counter-reset: step;
  margin-top: 1.8rem;
  display: grid;
  gap: 1rem;
}

.step {
  position: relative;
  padding: 1.3rem 1.3rem 1.3rem 3.6rem;
  background: var(--card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
}

.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 1.2rem;
  top: 1.3rem;
  width: 1.7rem;
  height: 1.7rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
}

.step h3 {
  margin: 0 0 0.35rem;
}

.step p {
  margin: 0;
  font-size: 0.93rem;
}

/* Footer */

footer.site-footer {
  padding: 3rem 1.5rem 4rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}

footer.site-footer .footer-links {
  margin-top: 0.8rem;
  display: flex;
  gap: 1.2rem;
  justify-content: center;
  flex-wrap: wrap;
}

.source-list {
  font-size: 0.85rem;
  color: var(--muted);
}

.source-list a {
  color: var(--muted);
}

.source-list a:hover {
  color: var(--accent);
}

code {
  background: color-mix(in srgb, var(--card) 100%, transparent);
  border: 1px solid var(--hairline);
  padding: 0.1em 0.4em;
  border-radius: 5px;
  font-size: 0.88em;
}

@media (max-width: 640px) {
  section {
    padding: 3.2rem 0;
  }
  .hero {
    padding-top: 3rem;
  }
  .fact-row {
    grid-template-columns: 1fr;
    align-items: start;
    gap: 0.4rem;
  }
}

@media (max-width: 480px) {
  .site-header {
    padding: 0.75rem 1rem;
  }
  main {
    padding: 0 1rem;
  }
  .btn {
    padding: 0.75em 1.1em;
    font-size: 0.92rem;
  }
}