/* kalina.labs — local, dependency-free design system */

.no-js .js-only { display: none !important; }

.focus-components { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-3); margin-block: var(--space-3); }
.focus-components > * { min-width: 0; }
.focus-diagram { display: block; width: 100%; height: auto; padding: 1rem; }
.focus-diagram path { fill: none; stroke: var(--signal); stroke-width: 3; }
.focus-diagram rect { fill: var(--surface); stroke: var(--line-strong); stroke-width: 2; }
.focus-diagram text { fill: var(--ink); font: 28px var(--mono); }
.focus-diagram .focus-diagram-sub { fill: var(--ink-soft); font: 20px var(--sans); }
.archive-subheading { margin-block: var(--space-5) var(--space-3); scroll-margin-top: 7rem; }
@media (max-width: 960px) {
  .focus-components { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 620px) {
  .focus-diagram { padding: .25rem; }
}

/* ROS uses the site's existing tokens, with content-first grids and a small-screen
   text alternative to the generated architecture diagram. */
.ros-feature { background: var(--surface-muted); border-block: 1px solid var(--line); }
.ros-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: center; gap: var(--space-4); }
.ros-split > *, .ros-grid > * { min-width: 0; }
.ros-nav ul { display: flex; flex-wrap: wrap; gap: .6rem; padding: 0; list-style: none; }
.ros-nav a { display: inline-flex; align-items: center; min-height: 44px; padding: .65rem .9rem; border: 1px solid var(--line-strong); color: var(--ink-soft); background: var(--surface); text-decoration: none; }
.ros-nav a[aria-current="page"] { color: var(--accent-ink); border-color: var(--accent); background: var(--accent-soft); }
.ros-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-3); }
.ros-card { padding: var(--space-3); border: 1px solid var(--line); border-top: 2px solid var(--signal); background: var(--surface); overflow-wrap: anywhere; }
.ros-card h2 { font-size: var(--step-1); }
.ros-card h2 a { color: var(--ink); }
.ros-card h3 { font-size: var(--step-0); }
.ros-source, .ros-formats { font-size: var(--step--1); color: var(--ink-soft); }
.ros-source { margin-top: var(--space-3); }
.ros-formats { font-family: var(--mono); }
.ros-block { padding-block: var(--space-4); border-bottom: 1px solid var(--line); }
.ros-block:last-child { border-bottom: 0; }
.ros-block > p, .ros-content > p { max-width: 80ch; }
.ros-content .rule-list { margin-block: var(--space-3); }
.ros-context, .ros-notice { margin-block: var(--space-3); padding: var(--space-3); background: var(--surface-muted); border-left: 3px solid var(--accent); overflow-wrap: anywhere; }
.ros-inline-links { display: flex; gap: var(--space-3); flex-wrap: wrap; }
.ros-inline-links a, .ros-links a { display: inline-flex; align-items: center; min-height: 44px; }
.ros-links { padding-left: 1.2rem; }
.ros-source-list { padding-left: 1.2rem; }
.ros-model { width: 100%; max-width: 720px; }
.ros-diagram { display: block; width: 100%; height: auto; }
.ros-diagram rect { fill: var(--surface); stroke: var(--line-strong); stroke-width: 1.5; }
.ros-diagram text { fill: var(--ink); font: 23px var(--sans); }
.ros-diagram .ros-diagram-number { fill: var(--accent-ink); font-family: var(--mono); }
.ros-diagram-line { fill: none; stroke: var(--signal); stroke-width: 3; }
.ros-diagram-text { display: none; }
@media (max-width: 960px) {
  .ros-split { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 620px) {
  .ros-grid { grid-template-columns: minmax(0, 1fr); }
  .ros-diagram { display: none; }
  .ros-diagram-text { display: grid; gap: .6rem; padding-left: 2rem; }
  .ros-diagram-text li { padding: .7rem; background: var(--surface); border: 1px solid var(--line); }
  .ros-diagram-text li::marker { color: var(--accent-ink); font-family: var(--mono); }
}
@media print {
  .ros-nav { display: none; }
  .ros-grid, .ros-split { display: block; }
  .ros-card { break-inside: avoid; margin-block: 1rem; }
  .ros-diagram { max-height: 80mm; }
}

:root {
  color-scheme: light;
  --bg: #f4f6f7;
  --surface: #ffffff;
  --surface-raised: #ffffff;
  --surface-muted: #e9eef1;
  --surface-strong: #dbe3e7;
  --ink: #101820;
  --ink-soft: #45525d;
  --ink-faint: #687680;
  --line: #cbd5da;
  --line-strong: #9cabb3;
  --accent: #0b70e0;
  --accent-ink: #064b9b;
  --accent-soft: #dbeaff;
  --signal: #12b8a6;
  --signal-soft: #d9f5f0;
  --warning: #b96900;
  --header-bg: rgb(244 246 247 / 92%);
  --shadow: 0 18px 50px rgb(16 24 32 / 8%);
  --shadow-small: 0 8px 24px rgb(16 24 32 / 7%);
  --max: 1240px;
  --reading: 760px;
  --radius: 4px;
  --radius-large: 10px;
  --step--1: clamp(0.82rem, 0.78rem + 0.15vw, 0.92rem);
  --step-0: clamp(0.98rem, 0.93rem + 0.2vw, 1.08rem);
  --step-1: clamp(1.22rem, 1.08rem + 0.5vw, 1.55rem);
  --step-2: clamp(1.55rem, 1.3rem + 0.9vw, 2.18rem);
  --step-3: clamp(2rem, 1.5rem + 1.6vw, 3.2rem);
  --step-4: clamp(2.65rem, 1.85rem + 2.6vw, 4.8rem);
  --space-1: clamp(0.45rem, 0.35rem + 0.35vw, 0.75rem);
  --space-2: clamp(0.8rem, 0.65rem + 0.5vw, 1.2rem);
  --space-3: clamp(1.2rem, 0.95rem + 0.85vw, 1.8rem);
  --space-4: clamp(1.8rem, 1.25rem + 1.6vw, 3rem);
  --space-5: clamp(2.8rem, 1.9rem + 3vw, 5.5rem);
  --space-6: clamp(4rem, 2.4rem + 5vw, 8rem);
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "Cascadia Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0b1118;
  --surface: #111a23;
  --surface-raised: #15212c;
  --surface-muted: #182630;
  --surface-strong: #21313c;
  --ink: #edf4f7;
  --ink-soft: #aab8c1;
  --ink-faint: #81909a;
  --line: #293945;
  --line-strong: #41525e;
  --accent: #67a9ff;
  --accent-ink: #9bc8ff;
  --accent-soft: #132f50;
  --signal: #55d9c6;
  --signal-soft: #103934;
  --warning: #f1aa4f;
  --header-bg: rgb(11 17 24 / 90%);
  --shadow: 0 22px 60px rgb(0 0 0 / 24%);
  --shadow-small: 0 8px 28px rgb(0 0 0 / 20%);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 6.5rem;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-width: 280px;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: var(--step-0);
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(to right, color-mix(in srgb, var(--line) 38%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in srgb, var(--line) 22%, transparent) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: linear-gradient(to bottom, black, transparent 70%);
  content: "";
  pointer-events: none;
}

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

a {
  color: var(--accent-ink);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button,
input,
select {
  font: inherit;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

::selection {
  background: var(--accent);
  color: #07111b;
}

h1,
h2,
h3,
p,
ul,
ol,
dl {
  margin-top: 0;
}

h1,
h2,
h3 {
  line-height: 1.08;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 16ch;
  margin-bottom: var(--space-3);
  font-size: var(--step-4);
  font-weight: 690;
}

h2 {
  font-size: var(--step-2);
}

h3 {
  font-size: var(--step-1);
}

p {
  color: var(--ink-soft);
}

[hidden] {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 0.5rem;
  left: 0.5rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  background: var(--ink);
  color: var(--bg);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.section-shell {
  width: min(calc(100% - 2 * var(--space-3)), var(--max));
  margin-inline: auto;
  min-width: 0;
}

.content-section,
.detail-section {
  padding-block: var(--space-6);
}

.eyebrow,
.footer-label,
.card-topline,
.detail-kicker,
.tool-index,
.error-code {
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: var(--step--1);
  font-weight: 650;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  background: var(--header-bg);
  backdrop-filter: blur(18px);
}

.header-inner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-3);
  width: min(calc(100% - 2 * var(--space-3)), var(--max));
  min-height: 76px;
  margin-inline: auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink);
  font-size: 1rem;
  letter-spacing: -0.02em;
  text-decoration: none;
  white-space: nowrap;
}

.brand img {
  width: 34px;
  height: 34px;
}

.brand strong {
  color: var(--accent-ink);
  font-weight: 750;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-width: 0;
  gap: var(--space-3);
}

.site-nav ul,
.site-footer ul {
  display: flex;
  align-items: center;
  gap: clamp(0.8rem, 1.6vw, 1.6rem);
  padding: 0;
  margin: 0;
  list-style: none;
}

.nav-link,
.utility-link {
  position: relative;
  color: var(--ink-soft);
  font-size: 0.92rem;
  font-weight: 620;
  text-decoration: none;
  white-space: nowrap;
}

.nav-link[aria-current="page"],
.nav-link:hover {
  color: var(--ink);
}

.nav-link[aria-current="page"]::after {
  position: absolute;
  right: 0;
  bottom: -0.72rem;
  left: 0;
  height: 2px;
  background: var(--accent);
  content: "";
}

.utility-link {
  padding: 0.5rem 0.72rem;
  border: 1px solid var(--line);
  color: var(--ink);
}

.theme-toggle,
.menu-toggle {
  display: inline-flex;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
}

.theme-toggle {
  gap: 0.55rem;
  padding: 0.4rem 0.6rem;
}

.theme-toggle__track {
  position: relative;
  width: 34px;
  height: 18px;
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  background: var(--surface-muted);
}

.theme-toggle__thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  transition: transform 160ms ease;
}

[data-theme="dark"] .theme-toggle__thumb {
  transform: translateX(16px);
}

.theme-toggle__label {
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
}

.menu-toggle {
  display: none;
  padding: 0;
}

.menu-toggle__lines,
.menu-toggle__lines::before,
.menu-toggle__lines::after {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  content: "";
}

.menu-toggle__lines::before {
  transform: translateY(-6px);
}

.menu-toggle__lines::after {
  transform: translateY(4px);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  align-items: center;
  min-height: calc(100vh - 76px);
  gap: var(--space-5);
  padding-block: var(--space-5);
}

.hero-copy,
.hero-visual,
.page-hero > *,
.section-heading > * {
  min-width: 0;
}

.hero .eyebrow,
.page-hero .eyebrow {
  margin-bottom: var(--space-2);
}

.hero-lead,
.detail-summary {
  max-width: 62ch;
  font-size: clamp(1.12rem, 1rem + 0.42vw, 1.4rem);
  line-height: 1.55;
}

.hero-actions,
.detail-actions,
.tool-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1rem;
  border: 1px solid var(--line-strong);
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 650;
  letter-spacing: 0.03em;
  text-decoration: none;
}

.button--primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #07111b;
}

.button--primary:hover {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--bg);
}

.button--ghost {
  background: var(--surface);
  color: var(--ink);
}

.button--ghost:hover {
  border-color: var(--accent);
  color: var(--accent-ink);
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: var(--space-5) 0 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.hero-facts div {
  min-width: 0;
  padding: 0.85rem;
  background: var(--surface);
}

.hero-facts dt {
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero-facts dd {
  margin: 0.2rem 0 0;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 1.15rem;
}

.hero-visual {
  position: relative;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero-visual img {
  width: 100%;
  height: auto;
}

.visual-caption {
  display: flex;
  justify-content: space-between;
  gap: var(--space-2);
  padding: 0.8rem 1rem;
  margin: 0;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.visual-caption span {
  color: var(--accent-ink);
  white-space: nowrap;
}

.statement-band {
  border-block: 1px solid var(--line);
  background: var(--surface);
}

.statement-band p {
  max-width: 1000px;
  padding-block: var(--space-4);
  margin: 0;
  color: var(--ink);
  font-size: var(--step-1);
  line-height: 1.5;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.45fr);
  align-items: end;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.section-heading h2,
.section-heading p,
.section-heading .text-link {
  margin-bottom: 0;
}

.section-heading > p {
  justify-self: end;
  max-width: 44ch;
}

.text-link {
  display: inline-flex;
  align-items: center;
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 650;
  text-decoration: none;
}

.text-link::after {
  margin-left: 0.45rem;
  content: "→";
}

.selected-grid,
.project-grid,
.publication-grid,
.method-grid,
.capability-grid,
.principle-grid,
.tool-grid,
.category-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
}

.project-card,
.publication-card,
.method-card,
.capability,
.principle-card,
.tool-card {
  position: relative;
  display: flex;
  min-width: 0;
  min-height: 100%;
  flex-direction: column;
  padding: var(--space-3);
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-small);
}

.project-card::before,
.publication-card::before,
.method-card::before,
.tool-card::before {
  position: absolute;
  top: -1px;
  right: -1px;
  left: -1px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--signal), transparent 80%);
  content: "";
}

.project-card h3,
.publication-card h3,
.method-card h3,
.tool-card h2 {
  margin: var(--space-4) 0 var(--space-2);
}

.project-card h3 a,
.publication-card h3 a,
.method-card h3 a {
  color: var(--ink);
  text-decoration: none;
}

.project-card h3 a::after,
.publication-card h3 a::after,
.method-card h3 a::after {
  position: absolute;
  inset: 0;
  content: "";
}

.project-card .text-link,
.publication-card .text-link,
.method-card .text-link {
  position: relative;
  z-index: 1;
  align-self: flex-start;
  margin-top: auto;
  padding-top: var(--space-3);
}

.card-topline {
  display: flex;
  min-height: 1.6rem;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
  color: var(--ink-faint);
  font-size: 0.68rem;
}

.card-index {
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.status {
  display: inline-flex;
  min-height: 1.55rem;
  align-items: center;
  padding: 0.15rem 0.4rem;
  border: 1px solid var(--line);
  background: var(--surface-muted);
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  white-space: nowrap;
}

.status--active,
.status--active-method,
.status--public-demo {
  border-color: color-mix(in srgb, var(--signal) 45%, var(--line));
  background: var(--signal-soft);
  color: color-mix(in srgb, var(--signal) 70%, var(--ink));
}

.status--release-candidate {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-ink);
}

.status--experimental,
.status--working-paper {
  border-color: color-mix(in srgb, var(--warning) 45%, var(--line));
  color: var(--warning);
}

.tag-list,
.architecture-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0;
  margin: var(--space-2) 0;
  list-style: none;
}

.tag-list li,
.architecture-list li {
  padding: 0.22rem 0.48rem;
  border: 1px solid var(--line);
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 0.7rem;
  overflow-wrap: anywhere;
}

.record-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1rem;
  padding-top: var(--space-2);
  border-top: 1px solid var(--line);
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.process-section,
.graph-section,
.principle-statement {
  border-block: 1px solid var(--line);
  background: var(--surface-muted);
}

.process-list {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  padding: 0;
  margin: 0;
  list-style: none;
  counter-reset: step;
}

.process-list li {
  position: relative;
  min-width: 0;
  padding: var(--space-3);
  border-top: 2px solid var(--line-strong);
  background: var(--surface);
}

.process-list li + li {
  border-left: 1px solid var(--line);
}

.process-list li::before {
  position: absolute;
  top: -6px;
  left: var(--space-3);
  width: 10px;
  height: 10px;
  border: 2px solid var(--surface);
  border-radius: 50%;
  background: var(--accent);
  content: "";
}

.process-index {
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 0.7rem;
}

.process-list h3 {
  margin: 0.6rem 0;
  font-size: 1rem;
}

.process-list p {
  margin-bottom: 0;
  font-size: 0.85rem;
}

.recent-list {
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--line-strong);
  list-style: none;
}

.recent-list li {
  display: grid;
  grid-template-columns: 100px 160px minmax(0, 1fr) 60px;
  gap: var(--space-2);
  align-items: baseline;
  padding-block: 1rem;
  border-bottom: 1px solid var(--line);
}

.recent-list time,
.recent-list span {
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 0.75rem;
}

.recent-list a {
  color: var(--ink);
  font-weight: 650;
  text-decoration: none;
}

.graph-preview {
  padding-block: var(--space-6);
  border-top: 1px solid var(--line);
}

.section-action {
  margin-top: var(--space-3);
  text-align: center;
}

.page-hero {
  padding-block: var(--space-6) var(--space-5);
}

.page-hero h1 {
  max-width: 19ch;
}

.page-hero .hero-lead {
  max-width: 760px;
}

.page-hero--split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.7fr);
  align-items: center;
  gap: var(--space-5);
}

.page-hero--split img {
  width: 100%;
  max-height: 460px;
}

.capability-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.capability {
  box-shadow: none;
}

.capability-mark {
  width: 36px;
  height: 3px;
  margin-bottom: var(--space-3);
  background: var(--accent);
}

.capability h2 {
  font-size: 1.1rem;
}

.capability p {
  margin-bottom: 0;
  font-size: 0.92rem;
}

.category-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  padding-bottom: var(--space-5);
}

.category-card {
  min-width: 0;
  padding: var(--space-3);
  border-top: 2px solid var(--line-strong);
  background: var(--surface);
  color: var(--ink);
  text-decoration: none;
}

.category-card:hover {
  border-color: var(--accent);
  color: var(--ink);
  transform: translateY(-2px);
}

.category-card > span {
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 0.65rem;
}

.category-card h2 {
  margin: var(--space-3) 0 var(--space-1);
  font-size: 1rem;
}

.category-card p {
  margin: 0;
  font-size: 0.82rem;
}

.research-group {
  padding-block: var(--space-5);
  scroll-margin-top: 5rem;
}

.research-group + .research-group {
  border-top: 1px solid var(--line);
}

.method-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.publication-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.filter-bar,
.graph-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: var(--space-3);
}

.chip {
  min-height: 44px;
  padding: 0.45rem 0.72rem;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-soft);
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.74rem;
}

.chip:hover,
.chip.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-ink);
}

.empty-state {
  padding: var(--space-4);
  border: 1px dashed var(--line-strong);
  text-align: center;
}

.research-graph-wrap {
  max-width: 100%;
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at center, color-mix(in srgb, var(--accent-soft) 70%, transparent), transparent 55%),
    var(--surface);
}

.research-graph {
  width: 100%;
  height: auto;
  aspect-ratio: 1000 / 560;
}

.graph-edge {
  stroke: var(--line-strong);
  stroke-width: 1.25;
  vector-effect: non-scaling-stroke;
  transition: opacity 160ms ease;
}

.graph-node circle {
  fill: var(--surface-raised);
  stroke: var(--line-strong);
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
  transition: fill 160ms ease, stroke 160ms ease, opacity 160ms ease;
}

.graph-node text {
  fill: var(--ink);
  font-family: var(--mono);
  font-size: 13px;
  pointer-events: none;
}

.graph-node--method circle {
  fill: var(--accent-soft);
  stroke: var(--accent);
}

.graph-node--project circle {
  fill: var(--signal-soft);
  stroke: var(--signal);
}

.graph-node a:hover circle,
.graph-node a:focus circle {
  fill: var(--accent);
  stroke: var(--ink);
}

.graph-node.is-muted,
.graph-edge.is-muted {
  opacity: 0.12;
}

.graph-fallback {
  margin-top: var(--space-2);
  font-size: 0.85rem;
}

.graph-fallback summary {
  min-height: 44px;
  cursor: pointer;
  font-family: var(--mono);
}

.graph-fallback ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.4rem 1rem;
}

.graph-fallback span {
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 0.7rem;
}

.principle-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.principle-card {
  display: grid;
  grid-template-columns: 50px minmax(0, 1fr);
  gap: 0 var(--space-2);
  box-shadow: none;
}

.principle-card > span {
  grid-row: 1 / 3;
  color: var(--accent-ink);
  font-family: var(--mono);
}

.principle-card h2 {
  font-size: 1.35rem;
}

.principle-card p {
  margin-bottom: 0;
}

.two-column-copy {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(0, 1fr);
  gap: var(--space-5);
  padding-block: var(--space-5);
}

.tool-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.tool-card {
  min-height: 320px;
}

.tool-card p {
  max-width: 50ch;
}

.tool-actions {
  margin-top: auto;
}

.external-note {
  margin-bottom: var(--space-5);
  padding: var(--space-3);
  border: 1px solid var(--line);
  background: var(--surface-muted);
}

.external-note p {
  margin: 0;
  font-size: 0.9rem;
}

.breadcrumbs {
  margin-bottom: var(--space-4);
  font-family: var(--mono);
  font-size: 0.74rem;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.breadcrumbs li:not(:last-child)::after {
  margin-left: 0.4rem;
  color: var(--ink-faint);
  content: "/";
}

.breadcrumbs li[aria-current="page"] {
  color: var(--ink-faint);
}

.detail-header {
  padding-block: var(--space-5);
}

.detail-kicker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.detail-header h1 {
  max-width: 18ch;
}

.detail-subtitle {
  max-width: 46ch;
  color: var(--ink);
  font-size: var(--step-2);
  line-height: 1.3;
}

.detail-summary {
  max-width: var(--reading);
}

.metadata-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  max-width: 920px;
  margin: var(--space-4) 0 0;
  border: 1px solid var(--line);
  background: var(--line);
}

.metadata-strip div {
  min-width: 0;
  padding: 0.8rem;
  background: var(--surface);
}

.metadata-strip dt {
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.metadata-strip dd {
  margin: 0.2rem 0 0;
  overflow-wrap: anywhere;
  font-size: 0.9rem;
  font-weight: 620;
}

.stage-list {
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--line-strong);
  list-style: none;
}

.stage-list li {
  display: grid;
  grid-template-columns: 80px minmax(0, 1fr);
  gap: var(--space-3);
  padding-block: var(--space-3);
  border-bottom: 1px solid var(--line);
}

.stage-list > li > span,
.case-section__index {
  color: var(--accent-ink);
  font-family: var(--mono);
}

.stage-list h2, .stage-list h3 {
  margin-bottom: 0.5rem;
  font-size: 1.3rem;
}

.stage-list p {
  margin-bottom: 0;
}

.detail-section--tinted {
  border-block: 1px solid var(--line);
  background: var(--surface-muted);
}

.rule-list {
  padding-left: 1.2rem;
  margin-bottom: 0;
}

.rule-list li {
  padding: 0.35rem 0 0.8rem 0.4rem;
  color: var(--ink-soft);
}

.case-sections {
  padding-top: 0;
}

.case-section {
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr);
  gap: var(--space-3);
  padding-block: var(--space-4);
  border-top: 1px solid var(--line);
}

.case-section > div {
  max-width: var(--reading);
}

.case-section h2 {
  font-size: 1.55rem;
}

.evidence-note {
  padding: var(--space-3);
  margin-block: 0 var(--space-5);
  border-left: 4px solid var(--warning);
  background: var(--surface);
}

.evidence-note p:last-child {
  margin-bottom: 0;
}

.detail-next {
  padding-bottom: var(--space-5);
}

.legal-page {
  max-width: 900px;
  padding-block: var(--space-5);
}

.legal-page h1 {
  max-width: none;
}

.legal-page section {
  padding-block: var(--space-3);
  border-top: 1px solid var(--line);
}

.legal-page section h2 {
  font-size: 1.3rem;
}

.legal-page address {
  color: var(--ink-soft);
  font-style: normal;
}

.not-found {
  display: grid;
  min-height: 70vh;
  align-content: center;
  justify-items: start;
}

.site-footer {
  border-top: 1px solid var(--line-strong);
  background: var(--surface);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(220px, 1.5fr) minmax(130px, 0.6fr) minmax(130px, 0.6fr) minmax(220px, 1fr);
  gap: var(--space-4);
  width: min(calc(100% - 2 * var(--space-3)), var(--max));
  padding-block: var(--space-5);
  margin-inline: auto;
}

.footer-brand {
  margin-bottom: 0.2rem;
  color: var(--ink);
  font-weight: 750;
}

.footer-note,
.footer-meta p {
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 0.7rem;
}

.site-footer ul {
  align-items: flex-start;
  flex-direction: column;
  gap: 0.35rem;
}

.site-footer a {
  font-size: 0.85rem;
}

.footer-meta {
  align-self: end;
}

.footer-meta p {
  margin-bottom: 0.35rem;
}

@media (max-width: 1080px) {
  .header-inner {
    grid-template-columns: auto minmax(0, 1fr) auto;
  }

  .site-nav {
    gap: 0.8rem;
  }

  .site-nav ul {
    gap: 0.8rem;
  }

  .theme-toggle__label {
    display: none;
  }

  .process-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    background: var(--line);
  }

  .process-list li {
    border-left: 0 !important;
  }

  .category-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .capability-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 960px) {
  .js .header-inner {
    grid-template-columns: auto 44px 44px;
  }

  .js .menu-toggle {
    display: inline-flex;
  }

  .js .site-nav {
    position: absolute;
    top: calc(100% + 1px);
    right: 0;
    left: 0;
    display: none;
    max-height: calc(100dvh - 80px);
    overflow-y: auto;
    align-items: stretch;
    padding: var(--space-3);
    border-bottom: 1px solid var(--line-strong);
    background: var(--surface);
    box-shadow: var(--shadow);
  }

  .js .site-nav.is-open {
    display: block;
  }

  .js .site-nav ul {
    align-items: stretch;
    flex-direction: column;
    gap: 0;
  }

  .js .site-nav li {
    border-bottom: 1px solid var(--line);
  }

  .js .nav-link,
  .js .utility-link {
    display: flex;
    min-height: 48px;
    align-items: center;
  }

  .js .nav-link[aria-current="page"]::after {
    display: none;
  }

  .js .utility-link {
    margin-top: 0.7rem;
    padding-inline: 0.72rem;
  }

  .no-js .header-inner {
    grid-template-columns: auto auto;
    padding-block: 0.7rem;
  }

  .no-js .site-nav {
    grid-column: 1 / -1;
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .no-js .site-nav ul {
    flex-wrap: wrap;
  }

  .hero,
  .page-hero--split {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-visual {
    max-width: 680px;
  }

  .selected-grid,
  .project-grid,
  .principle-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: var(--space-2);
  }

  .section-heading > p {
    justify-self: start;
  }

  .recent-list li {
    grid-template-columns: 90px minmax(0, 1fr) 50px;
  }

  .recent-list li > span:nth-child(2) {
    display: none;
  }

  .two-column-copy {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .section-shell,
  .header-inner,
  .footer-grid {
    width: min(calc(100% - 2rem), var(--max));
  }

  .header-inner {
    gap: 0.5rem;
  }

  .brand-wordmark {
    font-size: 0.92rem;
  }

  .hero {
    gap: var(--space-4);
    padding-block: var(--space-4);
  }

  .hero h1,
  .page-hero h1,
  .detail-header h1 {
    max-width: none;
    overflow-wrap: anywhere;
  }

  .hero-facts {
    grid-template-columns: 1fr;
  }

  .visual-caption {
    align-items: flex-start;
    flex-direction: column;
  }

  .selected-grid,
  .project-grid,
  .publication-grid,
  .method-grid,
  .capability-grid,
  .principle-grid,
  .tool-grid,
  .category-grid {
    grid-template-columns: 1fr;
  }

  .process-list {
    grid-template-columns: 1fr;
  }

  .recent-list li {
    grid-template-columns: 78px minmax(0, 1fr);
  }

  .recent-list li > span:last-child {
    display: none;
  }

  .category-grid {
    padding-bottom: var(--space-4);
  }

  .filter-bar {
    flex-wrap: nowrap;
    padding-bottom: 0.5rem;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
  }

  .filter-bar .chip {
    flex: 0 0 auto;
  }

  .research-graph-wrap {
    overflow-x: auto;
  }

  .research-graph {
    width: 760px;
    max-width: none;
  }

  .graph-fallback ul {
    grid-template-columns: 1fr;
  }

  .metadata-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stage-list li,
  .case-section {
    grid-template-columns: 48px minmax(0, 1fr);
  }

  .principle-card {
    grid-template-columns: 42px minmax(0, 1fr);
  }

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

@media (max-width: 360px) {
  .brand-wordmark {
    display: none;
  }

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

  .stage-list li,
  .case-section {
    grid-template-columns: 1fr;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media print {
  :root,
  :root[data-theme="dark"] {
    color-scheme: light;
    --bg: #fff;
    --surface: #fff;
    --surface-muted: #f2f2f2;
    --ink: #000;
    --ink-soft: #222;
    --ink-faint: #444;
    --line: #bbb;
    --line-strong: #777;
    --accent: #000;
    --accent-ink: #000;
  }

  body::before,
  .site-header,
  .site-footer,
  .hero-actions,
  .filter-bar,
  .graph-controls,
  .detail-actions,
  .detail-next,
  .section-action {
    display: none !important;
  }

  body {
    font-size: 10pt;
  }

  a {
    color: inherit;
  }

  .section-shell {
    width: 100%;
  }

  .content-section,
  .detail-section,
  .detail-header {
    padding-block: 1.2rem;
  }

  .project-card,
  .publication-card,
  .method-card,
  .tool-card {
    break-inside: avoid;
    box-shadow: none;
  }
}