/* Homepage (index.html) — scoped to html.index2 */
html.index2 {
  color-scheme: dark;
  --i2-fg: #ececec;
  --i2-muted: #9aa0a6;
  --i2-bg: #111111;
  --i2-surface: #181818;
  --i2-elevated: #1f1f1f;
  --i2-border: #2e2e2e;
  --i2-orange: #f7931a;
  --i2-orange-dim: #c97916;
}
html.index2 body {
  margin: 0;
  color: var(--i2-fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  background-color: var(--i2-bg);
}
/* Match index hero; keep commons visible on small screens (global style hides it). */
@media (max-width: 768px) {
  html.index2 .hero-background {
    display: block !important;
  }
  html.index2 .hero-content {
    background: none !important;
  }
}
.i2-wrap {
  max-width: 40rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 3.5rem;
}
.i2-paths {
  font-size: 0.8125rem;
  color: var(--i2-muted);
  margin: 0 0 2.5rem;
  line-height: 1.6;
}
.i2-paths ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: inline;
}
.i2-paths li {
  display: inline;
}
.i2-paths li + li::before {
  content: " · ";
  color: var(--i2-muted);
}
.i2-paths a {
  color: var(--i2-orange);
  text-decoration: none;
  font-weight: 600;
}
.i2-paths a:hover {
  text-decoration: underline;
}
.i2-paths-label {
  color: var(--i2-fg);
  font-weight: 600;
}
.i2-why-grid {
  display: grid;
  gap: 1rem;
  margin-top: 1rem;
}
@media (min-width: 640px) {
  .i2-why-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 960px) {
  .i2-why-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}
.i2-why-card {
  background: var(--i2-surface);
  border: 1px solid var(--i2-border);
  border-radius: 12px;
  padding: 1.1rem 1.15rem 1.2rem;
}
.i2-why-card h3 {
  margin: 0 0 0.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--i2-fg);
}
.i2-why-card p {
  margin: 0 0 0.85rem;
  font-size: 0.8125rem;
  color: var(--i2-muted);
  line-height: 1.5;
}
.i2-why-card .i2-why-cta {
  margin-top: 0.1rem;
}
.i2-why-card .i2-why-cta a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.45rem 0.9rem;
  border-radius: 8px;
  font-size: 0.75rem;
  font-weight: 700;
  text-decoration: none;
  color: #111;
  background: var(--i2-orange);
  border: 1px solid #e6820a;
  transition: filter 0.15s ease, transform 0.15s ease;
}
.i2-why-card .i2-why-cta a:hover {
  filter: brightness(1.06);
}
.i2-chart-embed {
  margin-top: 1rem;
  border-radius: 14px;
  border: 1px solid var(--i2-border);
  overflow: hidden;
  background: #0c0c0c;
}
.i2-chart-embed iframe {
  display: block;
  width: 100%;
  border: 0;
}
.i2-chart-embed--gov-spectrum iframe {
  min-height: 140px;
  height: 200px;
  max-height: 340px;
}
.i2-path,
#what-weve-built {
  scroll-margin-top: 4rem;
}
#main-content {
  scroll-margin-top: 0;
}
.i2-skip-link {
  position: absolute;
  left: 0.75rem;
  top: 0.5rem;
  z-index: 10001;
  padding: 0.5rem 0.85rem;
  background: var(--i2-orange);
  color: #111;
  font-weight: 700;
  font-size: 0.8125rem;
  text-decoration: none;
  border-radius: 6px;
  transform: translateY(-150%);
  transition: transform 0.15s ease;
}
.i2-skip-link:focus {
  transform: translateY(0);
  outline: 2px solid #fff;
  outline-offset: 2px;
}
html.index2 .i2-faq .i2-faq-intro {
  margin: -0.5rem 0 1.25rem;
}
html.index2 .i2-faq .faq-item[id] {
  scroll-margin-top: 4.5rem;
}
html.index2 #faq {
  scroll-margin-top: 4rem;
}
.i2-path .i2-learn-grid {
  margin-top: 0.85rem;
}
.i2-impl-grid {
  display: grid;
  gap: 1rem;
  margin-top: 1rem;
}
@media (min-width: 560px) {
  .i2-impl-grid {
    grid-template-columns: 1fr 1fr;
  }
}
.i2-impl-card {
  background: var(--i2-surface);
  border: 1px solid var(--i2-border);
  border-radius: 12px;
  padding: 1.15rem 1.2rem 1.25rem;
}
.i2-impl-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--i2-fg);
}
.i2-impl-card p {
  margin: 0 0 1rem;
  font-size: 0.8125rem;
  color: var(--i2-muted);
  line-height: 1.5;
}
.i2-impl-card .i2-impl-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.i2-impl-card .i2-impl-links a {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--i2-orange);
  text-decoration: none;
}
.i2-impl-card .i2-impl-links a:hover {
  text-decoration: underline;
}
.i2-impl-card.i2-impl-soon {
  opacity: 0.92;
}
.i2-block {
  margin-bottom: 2.75rem;
}
.i2-block-head {
  margin-bottom: 0.65rem;
}
.i2-eyebrow {
  display: block;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--i2-orange-dim);
  margin-bottom: 0.35rem;
}
.i2-block-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--i2-fg);
  margin: 0;
}
.i2-block-note {
  font-size: 0.875rem;
  color: var(--i2-muted);
  margin: 0.5rem 0 0;
  line-height: 1.5;
}
.i2-block-note a {
  color: var(--i2-orange);
  text-decoration: none;
}
.i2-block-note a:hover {
  text-decoration: underline;
}
.i2-spec-card {
  margin-top: 1rem;
  border-radius: 14px;
  border: 1px solid var(--i2-border);
  background: var(--i2-elevated);
  overflow: hidden;
}
.i2-spec-card .i2-spec-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.65rem 1rem;
  background: rgba(0, 0, 0, 0.35);
  border-bottom: 1px solid var(--i2-border);
  font-size: 0.8125rem;
  color: var(--i2-muted);
}
.i2-spec-card .i2-spec-head a {
  color: var(--i2-orange);
  text-decoration: none;
  font-weight: 600;
}
.i2-spec-card .i2-spec-head a:hover {
  text-decoration: underline;
}
.i2-spec-card .i2-spec-head--solo {
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
}
.i2-spec-card iframe {
  display: block;
  width: 100%;
  min-height: 300px;
  height: 680px;
  border: 0;
  overflow: hidden;
}
/* FAQ: no section-level fill; cards carry surface (matches other i2 blocks). */
html.index2 .i2-faq.faq-section {
  background: transparent;
  padding: 0;
}
html.index2 .i2-faq .faq-categories {
  margin-top: 0.75rem;
}
html.index2 .i2-faq .faq-category {
  margin-bottom: 2rem;
}
html.index2 .i2-faq .faq-category h3 {
  color: var(--i2-fg);
  font-size: 0.9375rem;
  font-weight: 600;
  border-bottom-color: var(--i2-border);
  margin-bottom: 1rem;
  padding-bottom: 0.4rem;
}
html.index2 .i2-faq .faq-item {
  background: var(--i2-surface);
  border-color: var(--i2-border);
}
html.index2 .i2-faq .faq-item:hover {
  border-color: rgba(247, 147, 26, 0.35);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
}
html.index2 .i2-faq .faq-question {
  color: var(--i2-fg);
  font-size: 0.9375rem;
}
html.index2 .i2-faq .faq-question:hover,
html.index2 .i2-faq .faq-question[aria-expanded="true"] {
  background: var(--i2-elevated);
  color: var(--i2-orange);
}
html.index2 .i2-faq .faq-question:focus {
  outline-color: var(--i2-orange);
}
html.index2 .i2-faq .faq-answer p {
  color: var(--i2-muted);
}
html.index2 .i2-faq .faq-answer a {
  color: var(--i2-orange);
}

.i2-footer-outer {
  width: 100%;
  box-sizing: border-box;
  margin-top: 1.5rem;
  padding: 2rem 1.25rem 2.25rem;
  border-top: 1px solid var(--i2-border);
  background: transparent;
}
.i2-footer-shell {
  max-width: 40rem;
  margin: 0 auto;
}
.i2-footer-brand {
  margin-bottom: 1.35rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--i2-border);
}
.i2-footer-name {
  display: block;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--i2-fg);
  letter-spacing: -0.02em;
}
.i2-footer-tag {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.75rem;
  color: var(--i2-muted);
  line-height: 1.4;
}
.i2-footer-nav {
  display: grid;
  gap: 1.25rem 1.5rem;
  grid-template-columns: 1fr 1fr;
}
@media (min-width: 480px) {
  .i2-footer-nav {
    grid-template-columns: 1fr 1fr 1fr;
  }
}
.i2-footer-col-title {
  display: block;
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--i2-muted);
  margin-bottom: 0.55rem;
}
.i2-footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}
.i2-footer-links a {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--i2-fg);
  text-decoration: none;
  line-height: 1.35;
}
.i2-footer-links a:hover {
  color: var(--i2-orange);
}
.i2-footer-meta {
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--i2-border);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1rem;
}
.i2-footer-copy {
  font-size: 0.6875rem;
  color: var(--i2-muted);
  line-height: 1.4;
}
.i2-footer-social {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.i2-footer-social a {
  color: var(--i2-muted);
  font-size: 1.125rem;
  text-decoration: none;
  line-height: 1;
}
.i2-footer-social a:hover {
  color: var(--i2-orange);
}
.i2-impl-card .i2-impl-links a.i2-impl-icon {
  font-size: 1.125rem;
  line-height: 1;
}
.i2-icon-github {
  display: inline-block;
  vertical-align: middle;
}

@media (prefers-reduced-motion: reduce) {
  .faq-answer {
    transition: none !important;
  }
  #sb-modal {
    animation: none !important;
  }
  @keyframes sb-modal-in {
    from { opacity: 1; transform: none; }
  }
  @keyframes sb-modal-up {
    from { transform: none; }
  }
}

/* ── Sunburst detail modal (managed by parent page) ── */
#sb-modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(8, 12, 24, 0.72);
  align-items: center;
  justify-content: center;
  padding: 1rem;
  backdrop-filter: blur(3px);
}
#sb-modal-overlay.sb-open {
  display: flex;
}
#sb-modal {
  background: var(--i2-surface, #141427);
  border: 1px solid var(--i2-border, #2a2a45);
  border-radius: 14px;
  box-shadow: 0 28px 56px rgba(0, 0, 0, 0.6);
  width: min(30rem, calc(100vw - 2rem));
  max-height: min(88vh, 640px);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--i2-fg, #e2e8f0);
  animation: sb-modal-in 0.18s cubic-bezier(0.22, 1, 0.36, 1);
}
@keyframes sb-modal-in {
  from { opacity: 0; transform: translateY(10px) scale(0.97); }
  to   { opacity: 1; transform: none; }
}
#sb-modal-head {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1rem 1.1rem 0.85rem;
  border-bottom: 1px solid var(--i2-border, #2a2a45);
  flex-shrink: 0;
}
#sb-modal-head-text {
  flex: 1;
  min-width: 0;
}
#sb-modal-meta {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--i2-orange, #f7931a);
  margin-bottom: 0.3rem;
}
#sb-modal-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--i2-fg, #f1f5f9);
  line-height: 1.35;
  word-break: break-word;
}
#sb-modal-close {
  flex-shrink: 0;
  width: 2.1rem;
  height: 2.1rem;
  padding: 0;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--i2-muted, #64748b);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.12s, color 0.12s;
}
#sb-modal-close:hover {
  background: var(--i2-border, #2a2a45);
  color: var(--i2-fg, #f1f5f9);
}
#sb-modal-body {
  padding: 0.9rem 1.1rem 1.1rem;
  overflow-y: auto;
  flex: 1;
  min-height: 0;
}
#sb-modal-linecount {
  font-size: 0.72rem;
  color: var(--i2-muted, #64748b);
  margin: 0 0 0.6rem;
}
#sb-modal-preview {
  margin: 0 0 0.75rem;
  font-size: 0.82rem;
  color: #cbd5e1;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
}
#sb-modal-preview.sb-modal-preview--katex {
  white-space: normal;
}
#sb-modal-preview .sunburst-preview-math-block {
  display: block;
  margin: 0.45rem 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  text-align: center;
}
#sb-modal-preview .sunburst-preview-math-block .katex-display {
  margin: 0.25rem 0;
}
#sb-modal-preview .katex {
  color: #e2e8f0;
}
#sb-modal-preview .sunburst-preview-math-inline .katex {
  font-size: 0.92em;
}
#sb-modal-path {
  margin: 0 0 0.9rem;
  font-size: 0.75rem;
  color: var(--i2-muted, #64748b);
  word-break: break-word;
}
#sb-modal-path code {
  font-size: 0.73em;
  background: rgba(255,255,255,0.07);
  border-radius: 4px;
  padding: 0.1em 0.35em;
  color: #e2e8f0;
}
#sb-modal-open-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.95rem;
  background: rgba(247, 147, 26, 0.13);
  border: 1px solid rgba(247, 147, 26, 0.5);
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--i2-orange, #f7931a);
  text-decoration: none;
  transition: background 0.13s, border-color 0.13s;
}
#sb-modal-open-btn:hover {
  background: rgba(247, 147, 26, 0.22);
  border-color: var(--i2-orange, #f7931a);
}
@media (max-width: 480px) {
  #sb-modal {
    border-radius: 12px 12px 0 0;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    max-width: 100%;
    max-height: 80dvh;
    animation: sb-modal-up 0.2s cubic-bezier(0.22, 1, 0.36, 1);
  }
  @keyframes sb-modal-up {
    from { transform: translateY(100%); }
    to   { transform: translateY(0); }
  }
  #sb-modal-overlay {
    align-items: flex-end;
    padding: 0;
  }
}