:root {
  color-scheme: light dark;
  --af-canvas: light-dark(#E6E3DB, #0F0F0E);
  --af-paper: light-dark(#F5F1E8, #1C1B18);
  --af-paper2: light-dark(#ECE7DA, #25241F);
  --af-ink: light-dark(#22221E, #ECE7DA);
  --af-ink2: light-dark(#5C5A52, #B0AB9F);
  --af-rule: light-dark(#D9D3C4, #3A382F);
  --af-accent: light-dark(#2F6B45, #8CC59B);
  --af-accent-hover: light-dark(#275A3A, #A3D4B0);
  --af-on-accent: light-dark(#F5F1E8, #14201A);
  --af-panel: var(--af-paper2);
  --af-soft: var(--af-ink2);
  --af-measure: 65ch;
  --af-sans: system-ui, -apple-system, "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --af-serif: Georgia, "Iowan Old Style", "Times New Roman", serif;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--af-sans);
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--af-ink);
  background: var(--af-canvas);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--af-ink);
  text-decoration: underline;
  text-decoration-color: var(--af-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
a:hover { color: var(--af-accent); }
a:focus-visible,
button:focus-visible,
.af-button:focus-visible {
  outline: 2px solid var(--af-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.af-skip {
  position: absolute;
  left: 1rem;
  top: -100px;
  background: var(--af-accent);
  color: var(--af-on-accent);
  padding: 0.6rem 1rem;
  z-index: 100;
  border-radius: 2px;
  text-decoration: none;
}
.af-skip:focus { top: 1rem; }

.af-wrap {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 3.25rem);
  background: var(--af-paper);
  min-height: 100vh;
  box-shadow: 0 0 0 1px var(--af-rule);
}

.af-header {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  align-items: center;
  justify-content: space-between;
  padding: 1.6rem 0 1.35rem;
  border-bottom: 1px solid var(--af-rule);
}

.af-wordmark {
  font-family: var(--af-serif);
  font-size: 1.55rem;
  letter-spacing: -0.02em;
  color: var(--af-ink);
  text-decoration: none;
}
.af-wordmark em {
  font-style: italic;
  font-weight: 400;
  color: var(--af-ink2);
}
.af-wordmark:hover { color: var(--af-accent); text-decoration: none; }

.af-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.98rem;
}
.af-nav a {
  color: var(--af-ink);
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.af-nav a:hover { color: var(--af-accent); text-decoration: underline; text-decoration-color: var(--af-accent); }
.af-nav a[aria-current="page"] {
  color: var(--af-accent);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 2px solid var(--af-accent);
}

.af-main { padding: 2.5rem 0 3.5rem; }

.af-prose { max-width: var(--af-measure); }
.af-prose > :first-child { margin-top: 0; }

h1, h2, h3 {
  font-family: var(--af-serif);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--af-ink);
  text-wrap: pretty;
}
h1 { font-size: clamp(2.1rem, 5vw, 3.25rem); margin: 0 0 1rem; max-width: 18ch; }
h2 { font-size: clamp(1.55rem, 3vw, 1.9rem); margin: 2.4rem 0 0.85rem; }
h3 { font-size: 1.25rem; margin: 1.6rem 0 0.6rem; }

.af-lede {
  font-size: 1.12rem;
  line-height: 1.6;
  margin: 0 0 1.5rem;
  max-width: var(--af-measure);
}

.af-soft { color: var(--af-ink2); }

.af-hero {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 2.5rem;
  align-items: end;
  padding: 1.5rem 0 2rem;
  border-bottom: 1px solid var(--af-rule);
  margin-bottom: 2rem;
}
@media (max-width: 720px) {
  .af-hero { grid-template-columns: 1fr; gap: 1.25rem; }
  h1 { max-width: 20ch; }
}

.af-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin: 1.25rem 0;
}

.af-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.75rem 1.1rem;
  border: 1px solid var(--af-accent);
  border-radius: 2px;
  font: inherit;
  font-size: 0.98rem;
  line-height: 1.3;
  text-decoration: none;
  color: var(--af-ink);
  background: transparent;
  cursor: pointer;
}
.af-button:hover {
  text-decoration: none;
  background: var(--af-paper2);
  color: var(--af-accent-hover);
  border-color: var(--af-accent-hover);
}
.af-button.af-primary {
  background: var(--af-accent);
  color: var(--af-on-accent);
  border-color: var(--af-accent);
}
.af-button.af-primary:hover {
  background: var(--af-accent-hover);
  border-color: var(--af-accent-hover);
  color: var(--af-on-accent);
  filter: none;
}

.af-entries {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin: 0.5rem 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.98rem;
}

.af-panel {
  background: var(--af-paper2);
  border-radius: 2px;
  padding: 1.35rem 1.4rem;
  margin: 1.5rem 0;
  max-width: var(--af-measure);
  box-shadow: 0 0 0 1px var(--af-rule);
}
.af-panel h2 { margin-top: 0; font-size: 1.45rem; }

.af-toc {
  max-width: var(--af-measure);
  margin: 0 0 2rem;
  padding: 1rem 1.2rem;
  border: 1px solid var(--af-rule);
  border-radius: 2px;
  background: var(--af-paper);
}
.af-toc h2 { margin: 0 0 0.6rem; font-size: 1.15rem; }
.af-toc ol { margin: 0; padding-left: 1.25rem; }
.af-toc li { margin: 0.25rem 0; }

.af-callout {
  border-left: 3px solid var(--af-accent);
  padding: 0.35rem 0 0.35rem 1rem;
  margin: 1.25rem 0;
  color: var(--af-ink2);
  font-size: 0.98rem;
  max-width: var(--af-measure);
}

.af-flag {
  max-width: var(--af-measure);
  margin: 0 0 1.25rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--af-rule);
  border-left: 3px solid var(--af-accent);
  background: var(--af-paper2);
  color: var(--af-ink);
  font-size: 0.98rem;
}

.af-placeholder {
  border: 1px dashed var(--af-rule);
  border-radius: 2px;
  padding: 1.5rem;
  max-width: var(--af-measure);
  color: var(--af-ink2);
}

.af-footer {
  border-top: 1px solid var(--af-rule);
  padding: 1.5rem 0 2.5rem;
  color: var(--af-ink2);
  font-size: 0.95rem;
}
.af-footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  list-style: none;
  margin: 0 0 0.85rem;
  padding: 0;
}
.af-footer a {
  color: var(--af-ink2);
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.af-footer a:hover { color: var(--af-accent); text-decoration: underline; text-decoration-color: var(--af-accent); }

.af-downloads {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin: 1.25rem 0;
}

.af-meta {
  font-size: 0.9rem;
  color: var(--af-ink2);
  margin: 0 0 1.5rem;
}

.af-commitments > section {
  max-width: var(--af-measure);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--af-rule);
  margin-bottom: 1.25rem;
}
.af-commitments > section:last-child { border-bottom: 0; }

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

/* --- AION-002 logo variants (default 2a) --- */
.af-logo-lockup {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--af-ink);
  text-decoration: none;
  min-height: 44px;
}
.af-logo-lockup:hover { color: var(--af-accent); text-decoration: none; }

.af-logo-wordmark {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  align-items: flex-start;
}
.af-logo-wordmark .af-logo-rule {
  display: none;
  width: 100%;
  height: 1px;
  background: currentColor;
}
.af-logo-type {
  font-family: var(--af-serif);
  font-size: 1.45rem;
  line-height: 1;
  letter-spacing: -0.02em;
  white-space: nowrap;
}
.af-logo-type em {
  font-style: italic;
  font-weight: 400;
  color: inherit;
}

.af-logo-mark {
  display: none;
  width: 2.5rem;
  height: 1.75rem;
  flex: 0 0 auto;
  color: var(--af-ink);
}
.af-logo-mark svg { width: 100%; height: 100%; display: block; }
.af-logo-accent-fill { fill: var(--af-accent) !important; color: var(--af-accent); }

/* 2a default: rule + type only */
body[data-logo="2a"] .af-logo-wordmark .af-logo-rule { display: block; }
body[data-logo="2a"] .af-logo-mark { display: none; }

/* 2b lens */
body[data-logo="2b"] .af-logo-mark-2b { display: block; }
body[data-logo="2b"] .af-logo-wordmark .af-logo-rule { display: none; }

/* 2c common ground */
body[data-logo="2c"] .af-logo-mark-2c { display: block; }
body[data-logo="2c"] .af-logo-wordmark .af-logo-rule { display: none; }

.af-logo-switcher {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: center;
  font-size: 0.75rem;
  color: var(--af-ink2);
  margin: 0.35rem 0 0;
}
.af-logo-switcher span { margin-right: 0.25rem; }
.af-logo-switcher a {
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.45rem;
  border: 1px solid var(--af-rule);
  border-radius: 2px;
  color: var(--af-ink);
  text-decoration: none;
  min-height: 28px;
  display: inline-flex;
  align-items: center;
}
.af-logo-switcher a:hover { border-color: var(--af-accent); color: var(--af-accent); }
.af-logo-switcher a[aria-current="true"] {
  border-color: var(--af-ink);
  background: var(--af-paper2);
}
@media (max-width: 720px) {
  .af-logo-type { font-size: 1.25rem; }
  .af-logo-mark { width: 2.1rem; height: 1.5rem; }
}

.af-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.15rem;
}
.af-header { align-items: flex-start; }

.af-video {
  position: relative;
  width: 100%;
  max-width: 40rem;
  aspect-ratio: 16 / 9;
  margin: 1rem 0;
  background: var(--af-paper2);
  border: 1px solid var(--af-rule);
  border-radius: 2px;
  overflow: hidden;
}
.af-video iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* --- AION-004 visual alignment to Fable frames (chrome/spacing only) --- */
body {
  font-size: 17px;
  line-height: 1.65;
  background: var(--af-canvas);
}

.af-wrap {
  width: min(1280px, 100%);
  margin: 0 auto;
  padding: 0;
  background: var(--af-paper);
  min-height: 100vh;
  box-shadow: 0 0 0 1px var(--af-rule), 0 12px 40px rgba(0, 0, 0, 0.08);
}

.af-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  min-height: 64px;
  padding: 0 32px;
  border-bottom: 1px solid var(--af-rule);
}

.af-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.2rem;
  padding: 0.55rem 0;
}

.af-logo-type {
  font-size: 20px;
  letter-spacing: -0.01em;
}

.af-nav {
  gap: 28px;
  font-size: 15px;
  line-height: 1;
}
.af-nav a {
  color: var(--af-ink2);
  text-decoration: none;
  min-height: 44px;
}
.af-nav a:hover { color: var(--af-ink); text-decoration: none; }
.af-nav a[aria-current="page"] {
  color: var(--af-ink);
  font-weight: 400;
  text-decoration: underline;
  text-decoration-color: var(--af-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 6px;
  border-bottom: 0;
}

.af-main {
  padding: 64px 32px 56px;
}

.af-prose,
.af-lede,
.af-panel,
.af-toc,
.af-callout,
.af-flag,
.af-placeholder,
.af-commitments > section {
  max-width: 65ch;
}

h1 {
  font-size: clamp(2rem, 4.5vw, 2.6rem);
  letter-spacing: -0.005em;
  max-width: 18ch;
}
h2 { font-size: clamp(1.45rem, 2.5vw, 1.7rem); margin-top: 2.75rem; }
h3 { font-size: 1.2rem; }

.af-hero {
  gap: 2.5rem 3rem;
  padding: 0 0 2.5rem;
  margin-bottom: 2.5rem;
}

.af-button {
  border-radius: 2px;
  padding: 0.8rem 1.15rem;
  font-size: 15px;
}
.af-button.af-primary {
  box-shadow: none;
}

.af-downloads {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  margin: 0 0 2rem;
  padding: 0.85rem 0 1rem;
  border-bottom: 1px solid var(--af-rule);
  max-width: 65ch;
}
.af-downloads .af-button[aria-disabled="true"] {
  opacity: 0.7;
  cursor: not-allowed;
  border-style: dashed;
}

.af-footer {
  padding: 1.35rem 32px 2.5rem;
  border-top: 1px solid var(--af-rule);
}
.af-footer-nav { gap: 1.5rem; }
.af-footer a { font-size: 15px; }

.af-logo-switcher {
  margin-top: 0.15rem;
}

.af-skip:focus {
  top: 0.75rem;
  left: 32px;
}

@media (max-width: 720px) {
  .af-header { padding: 0 20px; min-height: 56px; }
  .af-main { padding: 40px 20px 48px; }
  .af-footer { padding: 1.25rem 20px 2rem; }
  .af-nav { gap: 1rem 1.25rem; }
  .af-logo-type { font-size: 18px; }
}

/* MVP-002 argument map */
.af-argument-map {
  margin: 1.5rem 0 2rem;
  padding: 1.1rem 1.25rem 1.2rem;
  border: 1px solid color-mix(in srgb, var(--af-ink) 14%, transparent);
  border-radius: 6px;
  background: color-mix(in srgb, var(--af-cream) 92%, var(--af-green));
}
.af-argument-map h2 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
  font-weight: 600;
}
.af-argument-map > .af-soft {
  margin: 0 0 0.85rem;
  font-size: 0.92rem;
}
.af-argument-map ol {
  margin: 0;
  padding-left: 1.25rem;
}
.af-argument-map li {
  margin: 0.45rem 0;
  line-height: 1.45;
}
.af-claim-label {
  display: inline-block;
  margin-left: 0.25rem;
  padding: 0.05rem 0.4rem;
  font-size: 0.78rem;
  letter-spacing: 0.01em;
  color: var(--af-green);
  border: 1px solid color-mix(in srgb, var(--af-green) 35%, transparent);
  border-radius: 999px;
  white-space: nowrap;
}