/* Semantic Boundary — light instrument (Gemini base, locked v0 copy) */

:root {
  --bg: #fafafc;
  --surface: #ffffff;
  --surface-subtle: #f3f4f8;
  --border: #e2e4eb;
  --border-focus: #c4c8d4;
  --text-main: #0b132b;
  --text-muted: #4b5565;
  --text-tertiary: #6e7787;
  --teal-dim: #e6f6f6;
  --teal-border: #99dfdd;
  --teal-main: #0e8e89;
  --nn: #1a48cf;
  --nn-deep: #1639b8;
  --nn-dim: #e8eefc;
  --nn-border: #b7c5ef;
  --pf: #006874;
  --mark-orange: #b0480f;
  --mark-mid: #6e7787;
  --mark-green: #2c6b3f;
  --on-accent: #ffffff;
  --toggle-track: #e2e4eb;
  --toggle-knob: #ffffff;
  --header-bg: rgba(250, 250, 252, 0.92);
  --btn-fill: #0b132b;
  --btn-fill-hover: #1e294b;
  --btn-on-fill: #ffffff;
  --bloom-1: oklch(0.55 0.16 258 / 0.09);
  --bloom-2: oklch(0.65 0.13 55 / 0.1);
  --bloom-3: oklch(0.65 0.13 150 / 0.08);
  --bloom-4: oklch(0.55 0.16 258 / 0.07);
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --nav-height: 70px;
  --max-width: 1120px;
}

html[data-theme="dark"] {
  --bg: #0f1115;
  --surface: #16181c;
  --surface-subtle: #1c1f24;
  --border: #262a30;
  --border-focus: #3a4048;
  --text-main: #f4f5f6;
  --text-muted: #a8afb8;
  --text-tertiary: #767e87;
  --teal-dim: oklch(0.7 0.15 150 / 0.12);
  --teal-border: oklch(0.7 0.15 150 / 0.35);
  --teal-main: oklch(0.7 0.15 150);
  --nn: oklch(0.62 0.16 258);
  --nn-deep: oklch(0.72 0.16 258);
  --nn-dim: oklch(0.62 0.16 258 / 0.14);
  --nn-border: oklch(0.62 0.16 258 / 0.35);
  --mark-orange: oklch(0.72 0.14 55);
  --mark-mid: #767e87;
  --mark-green: oklch(0.7 0.15 150);
  --on-accent: #0d0f11;
  --toggle-track: oklch(0.62 0.16 258);
  --toggle-knob: #f4f5f6;
  --header-bg: rgba(15, 17, 21, 0.92);
  --btn-fill: #f4f5f6;
  --btn-fill-hover: #ffffff;
  --btn-on-fill: #0d0f11;
  --bloom-1: oklch(0.55 0.16 258 / 0.16);
  --bloom-2: oklch(0.7 0.14 55 / 0.14);
  --bloom-3: oklch(0.7 0.15 150 / 0.1);
  --bloom-4: oklch(0.55 0.16 258 / 0.12);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 12px);
}

section[id],
header[id] {
  scroll-margin-top: calc(var(--nav-height) + 12px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.page-blooms {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.bloom {
  position: absolute;
  background: radial-gradient(ellipse at center, var(--bloom-color) 0%, transparent 68%);
}

.bloom-1 {
  top: -6%;
  left: -8%;
  width: 700px;
  height: 520px;
  --bloom-color: var(--bloom-1);
}

.bloom-2 {
  top: 12%;
  right: -10%;
  width: 640px;
  height: 520px;
  --bloom-color: var(--bloom-2);
}

.bloom-3 {
  top: 60%;
  left: 15%;
  width: 760px;
  height: 600px;
  --bloom-color: var(--bloom-3);
}

.bloom-4 {
  bottom: -8%;
  right: 8%;
  width: 600px;
  height: 440px;
  --bloom-color: var(--bloom-4);
}

.site-header,
main,
.site-copyright,
.site-footer {
  position: relative;
  z-index: 1;
}

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

a {
  color: var(--teal-main);
  text-decoration: none;
}

a:hover {
  color: var(--text-main);
}

.container {
  width: min(100% - 3rem, var(--max-width));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  border-bottom: 1px solid var(--border);
  background: var(--header-bg);
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  color: var(--text-main);
  font-weight: 600;
  font-size: 0.9375rem;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.logo:hover {
  color: var(--text-main);
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  color: var(--text-main);
  line-height: 0;
}

.logo-mark svg {
  display: block;
  width: 40px;
  height: 26px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links {
  display: none;
  gap: 1.5rem;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.8125rem;
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--text-main);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  margin: 0;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text-muted);
  cursor: pointer;
  user-select: none;
}

.theme-toggle:hover {
  color: var(--text-main);
  border-color: var(--border-focus);
}

.theme-icon {
  display: none;
  line-height: 0;
}

.theme-icon svg {
  display: block;
}

html[data-theme="light"] .theme-icon-moon,
html:not([data-theme]) .theme-icon-moon {
  display: inline-flex;
}

html[data-theme="dark"] .theme-icon-sun {
  display: inline-flex;
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-brand {
  background: var(--teal-dim);
  color: var(--teal-main);
  border: 1px solid var(--teal-border);
}

.badge-cikm {
  background: var(--nn-dim);
  color: var(--nn);
  border: 1px solid var(--nn-border);
}

.badge-open-sbb {
  background: var(--teal-dim);
  color: var(--teal-main);
  border: 1px solid var(--teal-border);
}

.badge-illustrative {
  background: var(--surface);
  color: var(--text-tertiary);
  border: 1px solid var(--border);
  max-width: 100%;
  white-space: normal;
  text-align: left;
  line-height: 1.35;
}

.cta-group {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.65rem 1.25rem;
  border-radius: 6px;
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

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

.btn-primary:hover {
  background: var(--nn-deep);
  border-color: var(--nn-deep);
  color: #fff;
}

.btn-secondary {
  background: var(--surface);
  color: var(--text-main);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: var(--surface-subtle);
  border-color: var(--border-focus);
  color: var(--text-main);
}

.btn-fill-green {
  background: var(--mark-green);
  color: #fff;
  border-color: var(--mark-green);
}

.btn-fill-green:hover {
  background: #245a35;
  border-color: #245a35;
  color: #fff;
}

.btn-outline-blue {
  background: var(--surface);
  color: var(--nn);
  border-color: var(--nn);
}

.btn-outline-blue:hover {
  background: var(--nn-dim);
  color: var(--nn-deep);
  border-color: var(--nn-deep);
}

.btn-nav {
  border: 1px solid var(--nn);
  padding: 8px 14px;
  border-radius: 6px;
  background: var(--surface);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--nn);
  text-decoration: none;
}

.btn-nav:hover {
  color: var(--nn-deep);
  background: var(--nn-dim);
  border-color: var(--nn-deep);
}

.btn-nav-green {
  color: var(--mark-green);
  border-color: var(--mark-green);
}

.btn-nav-green:hover {
  color: var(--mark-green);
  background: color-mix(in srgb, var(--mark-green) 12%, var(--surface));
  border-color: var(--mark-green);
  filter: brightness(0.95);
}

.hero-section {
  padding: 5rem 0 4rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content h1 {
  font-size: clamp(1.85rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.15;
  margin: 1rem 0 1.25rem;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.hero-lead {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--text-muted);
  margin: 0 0 1.25rem;
  line-height: 1.45;
}

.hero-body {
  font-size: 1rem;
  color: var(--text-muted);
  margin: 0 0 1rem;
  line-height: 1.6;
}

.hero-access {
  margin-bottom: 0.35rem;
}

.hero-access strong {
  color: var(--teal-main);
  font-weight: 600;
}

.hero-access em {
  font-style: italic;
}

.hero-question {
  margin: 0 0 1rem;
  font-size: 1.05rem;
  line-height: 1.5;
  color: var(--text-main);
}

.hero-question em {
  font-style: italic;
  font-weight: 500;
}

.hero-diff {
  margin: 0 0 1.75rem;
}

.pipeline-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.pipeline-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mark-green);
}

.pipeline-diagram {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.75rem;
  box-shadow: 0 4px 18px rgba(11, 19, 43, 0.03);
}

.diagram-step {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  position: relative;
}

.diagram-step:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 17px;
  top: 36px;
  bottom: -16px;
  width: 2px;
  background: var(--border);
}

.step-icon {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  background: var(--surface-subtle);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  z-index: 2;
}

.step-icon.is-boundary {
  border-color: var(--teal-main);
  color: var(--teal-main);
}

.step-content {
  padding-bottom: 1.25rem;
}

.diagram-step:last-child .step-content {
  padding-bottom: 0;
}

.step-label {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
}

.step-title {
  font-size: 0.95rem;
  font-weight: 600;
}

.step-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.step-points {
  list-style: none;
  margin: 0.45rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.35rem;
}

.step-points li {
  position: relative;
  padding-left: 0.85rem;
  font-size: 0.85rem;
  line-height: 1.4;
  color: var(--text-muted);
}

.step-points li::before {
  content: "·";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--teal-main);
  font-weight: 700;
}

.boundary-highlight {
  background: var(--bg);
  border: 1px dashed var(--teal-main);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  margin: 0.25rem 0 0;
}

.boundary-highlight .step-label {
  color: var(--teal-main);
}

.examples-section {
  padding: 5rem 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-head {
  margin-bottom: 2.5rem;
  max-width: 720px;
}

.section-head h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: -0.02em;
  font-weight: 700;
  margin: 0.5rem 0 0.75rem;
}

.section-head .hero-lead {
  margin: 0 0 1rem;
}

.section-head .hero-body {
  margin: 0;
}

.section-head .hero-lead strong {
  color: var(--text-main);
  font-weight: 600;
}

.examples-section {
  padding: 4.5rem 0;
}

.example-opener {
  margin: 0;
  max-width: 42rem;
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--text-muted);
}

.example-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--border);
  border-bottom: 0;
  background: var(--surface);
}

.example-tab {
  appearance: none;
  border: 0;
  border-right: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  padding: 1.05rem 1rem 1rem;
  text-align: left;
  font: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  position: relative;
}

.example-tab:last-child {
  border-right: 0;
}

.example-tab-num {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--text-tertiary);
  margin-right: 0.65rem;
}

.example-tab-copy {
  display: inline-block;
  vertical-align: top;
}

.example-tab small {
  display: block;
  margin-top: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.example-tab:hover {
  color: var(--text-main);
}

.example-tab[aria-selected="true"] {
  color: var(--text-main);
  background: var(--surface-subtle);
}

.example-tab[data-tab="journal"] small {
  color: var(--teal-main);
  font-weight: 600;
}

.example-tab[aria-selected="true"]::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 3px;
  background: linear-gradient(90deg, var(--nn), var(--mark-green));
}

.example-panel {
  border: 1px solid var(--border);
  border-top: 0;
  background: var(--surface-subtle);
  padding: 1.75rem 1.5rem 1.5rem;
  min-height: 24rem;
}

.example-status {
  margin: 0 0 1rem;
}

.example-status .badge-illustrative {
  background: var(--surface);
}

.example-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.925fr 0.925fr;
  gap: 1rem;
  animation: example-enter 0.35s ease;
}

@keyframes example-enter {
  from {
    opacity: 0;
    transform: translateY(5px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.source-card,
.purpose-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.35rem 1.25rem;
  min-height: 20rem;
}

.source-card {
  display: flex;
  flex-direction: column;
}

.block-header {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  margin: 0 0 0.85rem;
}

.source-card blockquote {
  margin: 0 0 1.25rem;
  padding-left: 0.9rem;
  border-left: 2px solid var(--mark-green);
  color: var(--text-main);
  font-size: 0.95rem;
  line-height: 1.55;
}

.source-note {
  margin: auto 0 0;
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.source-footnote {
  margin: 0.65rem 0 0;
  font-size: 0.72rem;
  line-height: 1.4;
  color: var(--text-tertiary);
}

.example-closer {
  margin: 1.15rem 0 0;
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--text-main);
  font-weight: 500;
}

.example-evidence {
  margin: 0.85rem 0 0;
  padding: 0.85rem 1rem;
  border-left: 2px solid var(--mark-green);
  background: var(--surface);
  font-size: 0.84rem;
  line-height: 1.5;
  color: var(--text-muted);
}

.example-evidence strong {
  color: var(--teal-main);
  font-weight: 600;
}

.purpose-card {
  display: flex;
  flex-direction: column;
}

.purpose-kicker {
  margin: 0 0 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.purpose-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.purpose-question {
  margin: 0 0 1.25rem;
  font-size: 0.84rem;
  color: var(--text-muted);
}

.may-need {
  margin: 0 0 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mark-green);
}

.tokens {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.15rem;
}

.token {
  background: var(--teal-dim);
  border: 1px solid var(--teal-border);
  padding: 0.35rem 0.55rem;
  border-radius: 4px;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--teal-main);
}

.omit-block {
  margin-top: auto;
  padding-top: 0.9rem;
  border-top: 1px solid var(--border);
}

.may-not-need {
  margin: 0 0 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mark-orange);
}

.not-need {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.45;
}

.example-finding {
  margin-top: 1.25rem;
  background: #0b132b;
  color: #fff;
  border-radius: 8px;
  padding: 2rem 2.25rem;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 2.5rem;
  align-items: center;
}

.mini-flow {
  display: grid;
  grid-template-columns: 1fr 52px 1fr 1fr;
  gap: 0.55rem;
  align-items: center;
}

.mini-source,
.mini-flow > div:nth-child(n + 3) {
  border: 1px solid #3a4566;
  padding: 0.8rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.04em;
}

.mini-flow > div:nth-child(n + 3) {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.mini-flow span {
  color: #99dfdd;
}

.mini-flow strong {
  font-size: 0.62rem;
  color: #fff;
}

.mini-split {
  display: flex;
  align-items: center;
  justify-content: center;
  color: inherit;
}

.mini-logo {
  display: block;
  width: 48px;
  height: 31px;
}

.example-finding-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #99dfdd;
  margin: 0 0 0.75rem;
}

.example-finding p {
  margin: 0 0 0.65rem;
  font-size: 1.05rem;
  line-height: 1.5;
  color: #fff;
}

.example-finding-evidence {
  font-size: 0.8rem !important;
  color: #8e98b0 !important;
  margin: 0 !important;
}

html[data-theme="dark"] .example-finding {
  background: #fff;
  color: #0b132b;
}

html[data-theme="dark"] .example-finding-eyebrow {
  color: var(--mark-green);
}

html[data-theme="dark"] .example-finding p {
  color: #0b132b;
}

html[data-theme="dark"] .example-finding-evidence {
  color: #5c6578 !important;
}

html[data-theme="dark"] .mini-source,
html[data-theme="dark"] .mini-flow > div:nth-child(n + 3) {
  border-color: #d5dae6;
}

html[data-theme="dark"] .mini-flow span {
  color: var(--mark-green);
}

html[data-theme="dark"] .mini-flow strong {
  color: #0b132b;
}

@media (max-width: 900px) {
  .example-tabs {
    grid-template-columns: 1fr 1fr;
  }

  .example-tab:nth-child(2n) {
    border-right: 0;
  }

  .example-tab:nth-child(-n + 2) {
    border-bottom: 1px solid var(--border);
  }

  .example-layout {
    grid-template-columns: 1fr 1fr;
  }

  .source-card {
    grid-column: 1 / -1;
    min-height: auto;
  }

  .example-finding {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

@media (max-width: 620px) {
  .example-tabs {
    grid-template-columns: 1fr;
  }

  .example-tab {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .example-tab:last-child {
    border-bottom: 0;
  }

  .example-layout {
    grid-template-columns: 1fr;
  }

  .source-card,
  .purpose-card {
    min-height: auto;
  }

  .mini-flow {
    grid-template-columns: 1fr 48px 1fr;
  }

  .mini-flow > div:last-child {
    grid-column: 3;
  }
}

.caption {
  margin: 0.75rem 0 0;
  font-size: 0.85rem;
  color: var(--text-tertiary);
  font-style: italic;
}

.proof-section {
  padding: 5rem 0 2rem;
}

.not-line {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.artifacts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin: 2.5rem 0 1.25rem;
}

.scope-line {
  margin: 0 0 1.75rem;
  max-width: 760px;
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--text-tertiary);
}

.scope-line strong {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 600;
}

.artifact-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.25rem;
}

.artifact-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0.75rem 0 0.5rem;
  line-height: 1.3;
}

.artifact-meta {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.proof-points {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
}

.proof-points li {
  position: relative;
  padding-left: 1.25rem;
  margin: 0 0 0.45rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.45;
}

.proof-points li::before {
  content: "→";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--mark-green);
  font-weight: 600;
}

.code-snippet {
  background: var(--surface-subtle);
  border: 1px solid var(--border);
  padding: 0.65rem 0.85rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  margin: 1rem 0 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  color: var(--text-main);
}

.code-snippet-note {
  color: var(--text-tertiary);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.artifact-actions {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.paper-availability {
  margin: 0;
  font-size: 0.6875rem;
  line-height: 1.4;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

.governance-strip {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.75rem;
  margin-bottom: 3.5rem;
}

.governance-strip h3 {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  font-weight: 600;
}

.governance-text {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.governance-text a {
  color: var(--nn);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.governance-text a:hover {
  color: var(--nn-deep);
}

.governance-text-emphasis {
  color: var(--text-main);
  font-weight: 500;
}

.governance-caveat {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--text-tertiary);
  font-style: italic;
}

.discovery-box {
  background: var(--text-main);
  color: var(--bg);
  border-radius: 10px;
  padding: 3.25rem 2.75rem;
  margin-bottom: 2.5rem;
  text-align: center;
}

.discovery-box h2 {
  margin: 0 0 0.875rem;
  font-size: clamp(1.6rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: inherit;
}

.discovery-box > p {
  margin: 0 auto 1.625rem;
  font-size: 1rem;
  color: color-mix(in srgb, var(--bg) 75%, var(--text-main));
  max-width: 640px;
  line-height: 1.55;
}

.discovery-box > p strong {
  color: var(--bg);
  font-weight: 600;
}

.horizon {
  margin: 1.5rem 0 0;
  font-size: 0.9rem;
  color: color-mix(in srgb, var(--bg) 55%, var(--text-main));
}

.horizon p {
  margin: 0 0 0.35rem;
}

.horizon strong {
  color: var(--bg);
  font-weight: 600;
}

.intake {
  margin: 0 auto 1.5rem;
  max-width: 36rem;
  text-align: center;
}

.intake fieldset {
  margin: 0 0 1.25rem;
  padding: 0;
  border: 0;
  text-align: left;
}

.intake legend {
  margin: 0 0 0.75rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--bg);
  text-align: center;
  width: 100%;
}

.intake label {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin: 0 0 0.45rem;
  padding: 0.55rem 0.75rem;
  font-size: 0.9375rem;
  color: color-mix(in srgb, var(--bg) 82%, var(--text-main));
  border: 1px solid color-mix(in srgb, var(--bg) 28%, var(--text-main));
  border-radius: 8px;
  cursor: pointer;
}

.intake label:hover,
.intake label:has(input:checked) {
  color: var(--bg);
  border-color: var(--mark-green);
  background: color-mix(in srgb, var(--mark-green) 14%, transparent);
}

.intake input[type="checkbox"] {
  accent-color: var(--mark-green);
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
}

.other-detail {
  margin: 0.25rem 0 0.75rem;
}

.other-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.75rem 1rem;
  margin-top: 0.75rem;
}

.btn-send-note {
  /* Real control on the dark discovery panel: NN blue outline + solid surface fill */
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.2;
  padding: 0.7rem 1.35rem;
  min-width: 12.5rem;
  border-width: 2px;
  box-shadow: 0 1px 0 color-mix(in srgb, var(--nn) 18%, transparent);
}

.btn-send-note:hover:not(:disabled) {
  background: var(--nn-dim);
  color: var(--nn-deep);
  border-color: var(--nn-deep);
  box-shadow: 0 1px 0 color-mix(in srgb, var(--nn-deep) 22%, transparent);
}

.btn-send-note:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  box-shadow: none;
}

.note-status {
  margin: 0;
  font-size: 0.875rem;
  color: color-mix(in srgb, var(--bg) 72%, var(--text-main));
}

.note-status.is-error {
  color: #f0b4a0;
}

.other-detail-label {
  display: block;
  margin: 0;
  padding: 0;
  border: 0;
  background: none;
  cursor: text;
}

.other-detail-label:hover,
.other-detail-label:has(input:focus) {
  border: 0;
  background: none;
}

.other-detail input[type="text"] {
  width: 100%;
  box-sizing: border-box;
  margin: 0;
  padding: 0.7rem 0.85rem;
  border: 1px solid color-mix(in srgb, var(--bg) 28%, var(--text-main));
  border-radius: 8px;
  background: color-mix(in srgb, var(--bg) 6%, var(--text-main));
  color: var(--bg);
  font: inherit;
  font-size: 0.9375rem;
}

.other-detail input[type="text"]::placeholder {
  color: color-mix(in srgb, var(--bg) 45%, var(--text-main));
}

.other-detail input[type="text"]:focus {
  outline: 2px solid var(--mark-green);
  outline-offset: 1px;
}

.building-line {
  margin: 0 0 1rem;
  font-size: 0.95rem;
  line-height: 1.5;
  color: color-mix(in srgb, var(--bg) 72%, var(--text-main));
}

.building-line code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  font-weight: 500;
}

.btn-discovery {
  background: var(--mark-green);
  color: var(--on-accent);
  border-color: var(--mark-green);
}

.btn-discovery:hover {
  background: var(--mark-green);
  color: var(--on-accent);
  filter: brightness(1.08);
}

.contact-topics {
  margin: 0.85rem 0 0;
  font-size: 0.8125rem;
  line-height: 1.45;
  color: color-mix(in srgb, var(--bg) 55%, var(--text-main));
  font-family: var(--font-mono);
}

.contact-meta {
  margin: 1.25rem 0 0;
  font-size: 0.85rem;
  color: color-mix(in srgb, var(--bg) 55%, var(--text-main));
  font-family: var(--font-mono);
}

.contact-meta a {
  color: inherit;
}

.contact-meta a:hover {
  color: var(--bg);
}

.site-copyright {
  margin: 2rem 0 0;
  padding: 0 1.25rem;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-tertiary);
}

.site-footer {
  border-top: 1px solid #e2e0da;
  padding: 0.75rem 0;
  margin-top: 1.5rem;
  background: #ffffff;
}

.footer-collab {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #6b675f;
}

.collab-lockup {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  line-height: 0;
  text-decoration: none;
  color: #0b132b;
}

.collab-lockup:hover {
  color: var(--nn);
}

.collab-lockup img {
  display: block;
  width: auto;
  max-width: none;
  object-fit: contain;
}

.collab-text {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.2;
  white-space: nowrap;
}

.nn-lockup img {
  height: 26px;
  aspect-ratio: 157 / 78;
}

.pf-lockup img {
  height: 22px;
  aspect-ratio: 199 / 66;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.btn:focus-visible,
.btn-nav:focus-visible,
.theme-toggle:focus-visible,
.example-tab:focus-visible,
.nav-links a:focus-visible,
.collab-lockup:focus-visible,
.intake label:has(input:focus-visible) {
  outline: 2px solid var(--nn);
  outline-offset: 2px;
}

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

  .example-layout {
    animation: none;
  }

  .btn {
    transition: none;
  }
}

@media (max-width: 860px) {
  .hero-grid,
  .artifacts-grid {
    grid-template-columns: 1fr;
  }
}