@font-face { font-family: 'Jost'; font-style: italic; font-weight: 400; font-display: swap; src: url("/assets/fonts/jost-latin-400-italic.woff2") format("woff2"); }
@font-face { font-family: 'Jost'; font-style: normal; font-weight: 400; font-display: swap; src: url("/assets/fonts/jost-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: 'Jost'; font-style: normal; font-weight: 500; font-display: swap; src: url("/assets/fonts/jost-latin-500-normal.woff2") format("woff2"); }
@font-face { font-family: 'Jost'; font-style: normal; font-weight: 600; font-display: swap; src: url("/assets/fonts/jost-latin-600-normal.woff2") format("woff2"); }
:root {
  --bg-light-base: #ffffff;
  --fg-light-base-body: #10223b;
  --fg-light-base-heading: #10223b;
  --fg-light-base-muted: #465872;
  --fg-light-base-link: #1b4aa0;
  --fg-light-base-inverse: #10223b;
  --bg-light-card: #f2f6fb;
  --fg-light-card-body: #10223b;
  --fg-light-card-heading: #10223b;
  --fg-light-card-muted: #465872;
  --fg-light-card-link: #1b4aa0;
  --fg-light-card-inverse: #10223b;
  --bg-light-elevated: #e5edf7;
  --fg-light-elevated-body: #10223b;
  --fg-light-elevated-heading: #10223b;
  --fg-light-elevated-muted: #465872;
  --fg-light-elevated-link: #1b4aa0;
  --fg-light-elevated-inverse: #10223b;
  --brand-light-accent: #1b4aa0;
  --brand-light-accent-hover: #0e3175;
  --brand-light-on-accent: #ffffff;
  --focus-light-ring: #1b4aa0;
  --border-light-default: #5b7393;
  --border-light-subtle: #cbd8e8;
}
.bg-surface-base { background: var(--bg-light-base); --fg-body: var(--fg-light-base-body); --fg-heading: var(--fg-light-base-heading); --fg-muted: var(--fg-light-base-muted); --fg-link: var(--fg-light-base-link); --fg-inverse: var(--fg-light-base-inverse); }
.bg-surface-card { background: var(--bg-light-card); --fg-body: var(--fg-light-card-body); --fg-heading: var(--fg-light-card-heading); --fg-muted: var(--fg-light-card-muted); --fg-link: var(--fg-light-card-link); --fg-inverse: var(--fg-light-card-inverse); }
.bg-surface-elevated { background: var(--bg-light-elevated); --fg-body: var(--fg-light-elevated-body); --fg-heading: var(--fg-light-elevated-heading); --fg-muted: var(--fg-light-elevated-muted); --fg-link: var(--fg-light-elevated-link); --fg-inverse: var(--fg-light-elevated-inverse); }
.text-role-body { color: var(--fg-body); overflow-wrap: anywhere; }
.text-role-heading { color: var(--fg-heading); overflow-wrap: anywhere; }
.text-role-muted { color: var(--fg-muted); }
.text-role-link { color: var(--fg-link); }
.text-role-inverse { color: var(--fg-inverse); }
.text-role-link { text-decoration: underline; }
.text-role-link:hover { color: var(--brand-light-accent-hover); }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--focus-light-ring); outline-offset: 2px; }
img { max-width: 100%; height: auto; }
.site-logo { max-width: 100%; height: auto; }
.site-menu > summary { list-style: none; cursor: pointer; }
.site-menu > summary::-webkit-details-marker { display: none; }
:where(section[data-section][style]) { background-size: cover; background-position: center; padding: clamp(1.5rem, 4vw, 3rem); }
:where(section[data-section][style] > .bg-surface-card) { padding: clamp(1rem, 3vw, 2rem); }
:where(section[data-section][style] > .bg-surface-card > :first-child) { margin-top: 0; }
:where(section[data-section][style] > .bg-surface-card > :last-child) { margin-bottom: 0; }
.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { position: static; padding: 0.25rem 0.5rem; outline: 2px solid var(--focus-light-ring); }

:root {
  --geo: 'Jost', 'Century Gothic', 'Avenir Next', Futura, system-ui, sans-serif;
  --paper: var(--bg-light-base);
  --pale: var(--bg-light-card);
  --pale-2: var(--bg-light-elevated);
  --ink: var(--fg-light-base-body);
  --blue: var(--brand-light-accent);
  --blue-deep: var(--brand-light-accent-hover);
  --red: #c3262f;
  --wire: var(--border-light-default);
  --wire-soft: var(--border-light-subtle);
  --grid: #e9f0f8;
  --code: var(--wire);
  --rail: 17.5rem;
  --gutter: clamp(1rem, 4vw, 2.75rem);
  --node-radius: 0.5rem;
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body.blueprint {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 24px 24px;
  font-family: var(--geo);
  font-size: 1.0625rem;
  font-weight: 400;
  line-height: 1.62;
}

h1,
h2,
h3 {
  font-family: var(--geo);
  font-weight: 500;
  line-height: 1.18;
  margin: 0;
}

p {
  margin: 0 0 1rem;
}

a {
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--blue-deep);
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

.visually-hidden {
  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: absolute;
  left: -999px;
  top: 0.75rem;
  z-index: 60;
  padding: 0.6rem 1rem;
  border: 1.5px solid var(--wire);
  border-radius: var(--node-radius);
  background: var(--paper);
}

.skip-link:focus {
  left: 1rem;
}

[data-code="artery"] {
  --code: var(--red);
}

[data-code="vein"] {
  --code: var(--blue);
}

/* ---------- Header: top bar on small screens, side rail on desktop ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1.5px solid var(--wire-soft);
}

.rail-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.5rem var(--gutter);
}

.brand {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  min-width: 0;
  text-decoration: none;
}

.brand .site-logo {
  display: block;
  width: auto;
  height: 3rem;
}

.rail-toggle {
  position: relative;
  flex: none;
}

.rail-branches,
.rail-key {
  display: none;
}

.site-menu > summary {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  min-height: 2.75rem;
  padding: 0.35rem 0.9rem;
  border: 1.5px solid var(--wire);
  border-radius: var(--node-radius);
  background: var(--paper);
  font-weight: 500;
}

.menu-icon {
  position: relative;
  display: inline-block;
  width: 0.7rem;
  height: 0.7rem;
  border: 2px solid currentColor;
  border-radius: 50%;
}

.menu-icon::before,
.menu-icon::after {
  content: "";
  position: absolute;
  width: 0.5rem;
  height: 2px;
  top: 50%;
  margin-top: -1px;
}

.menu-icon::before {
  right: 100%;
  background: var(--red);
}

.menu-icon::after {
  left: 100%;
  background: var(--blue);
}

.site-menu[open] .menu-icon {
  background: currentColor;
}

.site-menu > ul {
  position: absolute;
  right: 0;
  top: calc(100% + 0.5rem);
  width: min(20rem, calc(100vw - 2rem));
  max-height: calc(100vh - 6rem);
  overflow-y: auto;
  margin: 0;
  padding: 0.75rem;
  list-style: none;
  border: 1.5px solid var(--wire);
  border-radius: var(--node-radius);
  background: var(--paper);
}

.site-menu ul ul {
  list-style: none;
  margin: 0 0 0.5rem 0.9rem;
  padding: 0 0 0 0.75rem;
  border-left: 1.5px solid var(--wire-soft);
}

.site-menu li a {
  display: flex;
  align-items: center;
  min-height: 2.75rem;
  padding: 0.3rem 0.5rem;
  text-decoration: none;
}

.site-menu > ul > li > a {
  font-weight: 500;
}

.site-menu li a:hover {
  text-decoration: underline;
}

@media (min-width: 64rem) {
  body.blueprint {
    display: grid;
    grid-template-columns: var(--rail) minmax(0, 1fr);
    grid-template-rows: 1fr auto;
  }

  .site-header {
    grid-column: 1;
    grid-row: 1 / span 2;
    align-self: start;
    height: 100vh;
    border-bottom: 0;
    border-right: 1.5px solid var(--wire-soft);
  }

  .rail-inner {
    height: 100%;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 1.75rem;
    padding: 1.5rem 1.25rem;
  }

  .brand .site-logo {
    width: 100%;
    height: auto;
  }

  .rail-toggle {
    display: none;
  }

  .rail-branches {
    display: block;
  }

  .rail-key {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-top: auto;
    font-size: 0.9rem;
  }

  .page-frame {
    grid-column: 2;
  }

  .site-footer {
    grid-column: 2;
  }
}

/* Grouped rail: each topic is a disclosure that flies out to the right */

.site-nav > ul {
  position: relative;
  margin: 0;
  padding: 0 0 0 1rem;
  list-style: none;
  border-left: 1.5px solid var(--wire-soft);
}

.site-nav > ul > li {
  position: relative;
}

.site-nav > ul > li::before {
  content: "";
  position: absolute;
  left: -1rem;
  top: 1.375rem;
  width: 0.7rem;
  height: 1.5px;
  background: var(--code);
}

.site-nav > ul > li:has(a[href^="/atherosclerosis"]),
.site-nav > ul > li:has(a[href^="/abdominal-aortic-aneurysm"]) {
  --code: var(--red);
}

.site-nav > ul > li:has(a[href^="/chronic-venous-insufficiency"]),
.site-nav > ul > li:has(a[href^="/endovenous-ablation"]) {
  --code: var(--blue);
}

.site-nav > ul > li > a,
.site-nav-group > summary {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 2.75rem;
  padding: 0.3rem 0.4rem;
  border-radius: var(--node-radius);
  font-weight: 500;
  text-decoration: none;
}

.site-nav-group > summary {
  list-style: none;
  cursor: pointer;
}

.site-nav-group > summary::-webkit-details-marker {
  display: none;
}

.site-nav-group > summary::before {
  content: "";
  flex: none;
  width: 0.6rem;
  height: 0.6rem;
  border: 2px solid var(--code);
  border-radius: 50%;
}

.site-nav-group[open] > summary {
  background: var(--pale-2);
}

.site-nav-group[open] > summary::before {
  background: var(--code);
}

.site-nav > ul > li > a:hover,
.site-nav-group > summary:hover {
  background: var(--pale);
  text-decoration: underline;
}

.site-nav a[aria-current="page"] {
  text-decoration: underline;
  text-decoration-thickness: 2px;
}

.site-nav-group > ul {
  position: absolute;
  left: calc(100% + 1.75rem);
  top: 0;
  z-index: 45;
  width: 20rem;
  max-height: calc(100vh - 2rem);
  overflow-y: auto;
  margin: 0;
  padding: 0.75rem 0.9rem;
  list-style: none;
  border: 1.5px solid var(--code);
  border-radius: var(--node-radius);
  background: var(--paper);
}

.site-nav-group > ul::before {
  content: "";
  position: absolute;
  left: -1.85rem;
  top: 1.35rem;
  width: 1.75rem;
  height: 1.5px;
  background: var(--code);
}

.site-nav-group > ul > li a {
  display: flex;
  align-items: center;
  min-height: 2.75rem;
  padding: 0.25rem 0.35rem 0.25rem 0.85rem;
  border-left: 1.5px solid var(--wire-soft);
  text-decoration: none;
}

.site-nav-group > ul > li:first-child a {
  border-left-color: var(--code);
  font-weight: 500;
}

.site-nav-group > ul > li a:hover {
  border-left-color: var(--code);
  text-decoration: underline;
}

.key-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.key-chip::before {
  content: "";
  width: 1.4rem;
  height: 2px;
  background: var(--code);
}

.key-artery {
  --code: var(--red);
}

.key-vein {
  --code: var(--blue);
}

/* ---------- Page frame ---------- */

.page-frame {
  flex: 1 0 auto;
  min-width: 0;
}

.breadcrumbs {
  max-width: 72rem;
  padding: 1.25rem var(--gutter) 0;
}

.breadcrumbs ol {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 0;
  font-size: 0.92rem;
}

.breadcrumbs li {
  display: inline-flex;
  align-items: center;
}

.breadcrumbs li + li::before {
  content: "";
  display: inline-block;
  width: 1.4rem;
  height: 1.5px;
  margin: 0 0.45rem;
  background: var(--wire);
}

.breadcrumbs a {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
}

.sheet {
  display: block;
  max-width: 72rem;
  padding: clamp(1.25rem, 3vw, 2.25rem) var(--gutter) clamp(2.5rem, 6vw, 4.5rem);
}

.node-title h1 {
  font-size: clamp(2rem, 1.4rem + 2.4vw, 3rem);
  font-weight: 500;
  letter-spacing: -0.015em;
  line-height: 1.08;
}

.map-head {
  margin-bottom: 1rem;
  font-size: clamp(1.2rem, 1.05rem + 0.6vw, 1.45rem);
}

.notes-node,
.answer-steps,
.statement-node,
.area-node,
.terminal-node,
.topic-node,
.question-node,
.legend-node,
.input-node {
  border: 1.5px solid var(--wire);
  border-radius: var(--node-radius);
}

/* Rendered bodies */

.prose {
  max-width: 40rem;
}

.prose h2 {
  margin: 2rem 0 0.65rem;
  font-size: clamp(1.25rem, 1.1rem + 0.6vw, 1.5rem);
}

.prose h3 {
  margin: 1.5rem 0 0.5rem;
  font-size: 1.15rem;
}

.prose ul,
.prose ol {
  margin: 0 0 1.25rem;
  padding-left: 1.3rem;
}

.prose li {
  margin-bottom: 0.4rem;
}

.prose ul li::marker {
  color: var(--wire);
}

.prose blockquote {
  margin: 1.25rem 0;
  padding: 0.75rem 1.1rem;
  border-left: 2px solid var(--wire);
}

.prose > :first-child {
  margin-top: 0;
}

.prose > :last-child {
  margin-bottom: 0;
}

figure.photo-hero {
  margin: 0 0 1.5rem;
  padding: 0.4rem;
  border: 1.5px solid var(--wire-soft);
  border-radius: var(--node-radius);
  background: var(--paper);
}

figure.photo-hero img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 0.25rem;
}

section[data-section][style] {
  margin: 1.5rem 0;
  padding: clamp(1.25rem, 4vw, 2.5rem);
  border-radius: var(--node-radius);
  background-size: cover;
  background-position: center;
}

/* ---------- Home: hub node branching to topic nodes ---------- */

.flow {
  display: grid;
  gap: 2.5rem;
}

.hub-node {
  position: relative;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 2.5px solid var(--ink);
  border-radius: 1rem;
}

.hub-title h1 {
  font-size: clamp(2.1rem, 1.3rem + 3vw, 3.4rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.04;
}

.hub-lines {
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1.5px solid var(--wire-soft);
}

.hub-lines .display-line {
  position: relative;
  margin: 0 0 0.75rem;
  padding-left: 1.4rem;
  font-size: 1.05rem;
  line-height: 1.5;
}

.hub-lines .display-line::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 0.55rem;
  height: 0.55rem;
  border: 2px solid var(--wire);
  border-radius: 50%;
}

.hub-lines .display-line:last-child {
  margin-bottom: 0;
}

.branches {
  position: relative;
  margin: 0;
  padding: 0 0 0 2rem;
  list-style: none;
  display: grid;
  gap: 1rem;
}

.branches::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.6rem;
  bottom: 1.6rem;
  width: 1.5px;
  background: var(--ink);
}

.branch {
  position: relative;
  padding: 1rem 1.15rem 1.1rem;
  border: 1.5px solid var(--code);
  border-left-width: 4px;
  border-radius: var(--node-radius);
}

.branch::before {
  content: "";
  position: absolute;
  left: calc(-2rem - 4px);
  top: 1.55rem;
  width: 2rem;
  height: 2px;
  background: var(--code);
}

.branch::after {
  content: "";
  position: absolute;
  left: calc(-2rem - 8px);
  top: calc(1.55rem - 4px);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--code);
}

.branch-head {
  font-size: 1.25rem;
}

.branch-head a {
  text-decoration: none;
}

.branch-head a:hover {
  text-decoration: underline;
}

.branch-code {
  margin: 0.15rem 0 0.6rem;
  font-size: 0.9rem;
}

.leaf-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.leaf-list li {
  position: relative;
  padding-left: 1.25rem;
}

.leaf-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1.5px;
  background: var(--wire-soft);
}

.leaf-list li::after {
  content: "";
  position: absolute;
  left: 0;
  top: 1.375rem;
  width: 0.8rem;
  height: 1.5px;
  background: var(--wire-soft);
}

.leaf-list a {
  display: flex;
  align-items: center;
  min-height: 2.75rem;
  padding: 0.2rem 0;
}

.notes-node {
  margin-top: clamp(2rem, 5vw, 3rem);
  padding: clamp(1.25rem, 4vw, 2.25rem);
}

@media (min-width: 56rem) {
  .flow {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: center;
    gap: 0 3.5rem;
  }

  .hub-node::after {
    content: "";
    position: absolute;
    left: 100%;
    top: 50%;
    width: calc(3.5rem + 2.5px);
    height: 2px;
    background: var(--ink);
  }
}

/* ---------- Topic cluster: stepped branch map ---------- */

.topic-node,
.question-node {
  position: relative;
  display: inline-block;
  max-width: 52rem;
  padding: clamp(1.1rem, 3vw, 1.75rem) clamp(1.25rem, 3.5vw, 2.25rem);
  border-width: 2.5px;
  border-color: var(--code);
}

.page-topic:has(.step-nodes a[href^="/atherosclerosis/"]),
.page-topic:has(.step-nodes a[href^="/abdominal-aortic-aneurysm/"]),
.page-frame:has(.breadcrumbs a[href="/atherosclerosis"]),
.page-frame:has(.breadcrumbs a[href="/abdominal-aortic-aneurysm"]) {
  --code: var(--red);
}

.page-topic:has(.step-nodes a[href^="/chronic-venous-insufficiency/"]),
.page-topic:has(.step-nodes a[href^="/endovenous-ablation/"]),
.page-frame:has(.breadcrumbs a[href="/chronic-venous-insufficiency"]),
.page-frame:has(.breadcrumbs a[href="/endovenous-ablation"]) {
  --code: var(--blue);
}

.branch-map {
  position: relative;
  margin: 0;
  padding: 2rem 0 0 1.5rem;
  border-left: 2px solid var(--code);
  margin-left: 1.5rem;
}

.step-nodes ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.6rem;
  max-width: 46rem;
}

.step-nodes ul:empty {
  display: none;
}

.step-nodes li {
  position: relative;
}

.step-nodes li::before {
  content: "";
  position: absolute;
  left: -1.5rem;
  top: 50%;
  width: 1.5rem;
  height: 1.5px;
  background: var(--code);
}

.step-nodes li a {
  display: flex;
  align-items: center;
  min-height: 3rem;
  padding: 0.55rem 1rem;
  border: 1.5px solid var(--wire);
  border-radius: var(--node-radius);
  background: var(--paper);
  text-decoration: none;
}

.step-nodes li a:hover {
  border-color: var(--code);
  text-decoration: underline;
}

@media (min-width: 48rem) {
  .step-nodes li:nth-child(4n + 2) {
    margin-left: 2.5rem;
  }

  .step-nodes li:nth-child(4n + 3) {
    margin-left: 5rem;
  }

  .step-nodes li:nth-child(4n + 4) {
    margin-left: 2.5rem;
  }

  .step-nodes li:nth-child(4n + 2)::before,
  .step-nodes li:nth-child(4n + 4)::before {
    left: -4rem;
    width: 4rem;
  }

  .step-nodes li:nth-child(4n + 3)::before {
    left: -6.5rem;
    width: 6.5rem;
  }
}

.page-topic .notes-node {
  margin-left: 0;
}

/* ---------- Geo cluster: area node split against a topic network ---------- */

.area-split {
  display: grid;
  gap: 2rem;
}

.area-node {
  padding: clamp(1.25rem, 4vw, 2.25rem);
  border-width: 2.5px;
  border-color: var(--ink);
}

.area-node .prose {
  margin-top: 1.25rem;
}

.area-network {
  position: relative;
}

.area-grid {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
}

.area-link {
  display: grid;
  gap: 0.25rem;
  padding: 0.85rem 1rem 0.95rem;
  border: 1.5px solid var(--code);
  border-top-width: 4px;
  border-radius: var(--node-radius);
}

.area-link a {
  display: flex;
  align-items: center;
  min-height: 2.75rem;
}

.area-topic {
  font-weight: 500;
  font-size: 1.1rem;
}

@media (min-width: 60rem) {
  .area-split {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
    gap: 3rem;
  }

  .area-network {
    position: sticky;
    top: 1.5rem;
  }

  .area-network::before {
    content: "";
    position: absolute;
    right: 100%;
    top: 1rem;
    width: 3rem;
    height: 1.5px;
    background: var(--ink);
  }

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

/* ---------- Question detail: answer steps on a connector line ---------- */

.answer-steps {
  margin-top: 1.5rem;
  padding: clamp(1.25rem, 4vw, 2.25rem);
}

.answer-steps .prose {
  position: relative;
  padding-left: 1.75rem;
  border-left: 1.5px solid var(--wire-soft);
}

.answer-steps .prose h2 {
  position: relative;
}

.answer-steps .prose h2::before {
  content: "";
  position: absolute;
  left: calc(-1.75rem - 7px);
  top: 0.3em;
  width: 9px;
  height: 9px;
  border: 2px solid var(--code);
  border-radius: 50%;
  background: var(--paper);
}

.answer-steps .prose > figure.photo-hero:first-child {
  margin-left: -0.5rem;
}

.linked-nodes {
  margin-top: 2.25rem;
}

.linked-row {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.linked-node {
  position: relative;
  border: 1.5px solid var(--code);
  border-radius: var(--node-radius);
}

.linked-node + .linked-node::before {
  content: "";
  position: absolute;
  right: 100%;
  top: 50%;
  width: 0.75rem;
  height: 1.5px;
  background: var(--wire);
}

.linked-node a {
  display: flex;
  align-items: center;
  min-height: 2.75rem;
  padding: 0.35rem 1rem;
  text-decoration: none;
}

.linked-node a:hover {
  text-decoration: underline;
}

/* ---------- About: legend sheet beside the statement ---------- */

.about-split {
  display: grid;
  gap: 2rem;
}

.legend-node {
  padding: clamp(1.25rem, 3vw, 1.75rem);
}

.legend-head {
  margin-bottom: 1rem;
  font-size: 1.2rem;
}

.legend-list {
  margin: 0;
  display: grid;
  gap: 1.1rem;
}

.legend-row {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  gap: 0 0.75rem;
}

.legend-row::before {
  content: "";
  grid-row: 1 / span 2;
  align-self: start;
  margin-top: 0.75rem;
  height: 3px;
  background: var(--code);
}

.legend-row[data-code="neutral"]::before {
  height: 1.5px;
  background: var(--wire);
}

.legend-row dt {
  font-weight: 500;
}

.legend-row dd {
  margin: 0;
}

.statement-node {
  padding: clamp(1.25rem, 4vw, 2.25rem);
}

.statement-node .prose {
  margin-top: 1.25rem;
}

@media (min-width: 60rem) {
  .about-split {
    grid-template-columns: 19rem minmax(0, 1fr);
    align-items: start;
    gap: 3rem;
  }

  .legend-node {
    position: sticky;
    top: 1.5rem;
  }
}

/* ---------- Contact: a single input node ---------- */

.contact-column {
  max-width: 42rem;
  display: grid;
  gap: 1.5rem;
}

.input-node {
  position: relative;
  display: grid;
  gap: 1.1rem;
  margin: 0.5rem 0 0;
  padding: clamp(1.25rem, 4vw, 2rem);
  border-width: 2.5px;
  border-color: var(--ink);
}

.input-node::before {
  content: "";
  position: absolute;
  left: 2rem;
  bottom: 100%;
  width: 1.5px;
  height: 1.5rem;
  background: var(--ink);
}

.field {
  display: grid;
  gap: 0.35rem;
  margin: 0;
}

.field label {
  font-weight: 500;
}

.field input,
.field textarea {
  width: 100%;
  min-height: 3rem;
  padding: 0.7rem 0.9rem;
  border: 1.5px solid var(--wire);
  border-radius: var(--node-radius);
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  font-size: 1.0625rem;
}

.field textarea {
  min-height: 9rem;
  resize: vertical;
}

.field input:focus-visible,
.field textarea:focus-visible {
  border-color: var(--blue);
}

.form-actions {
  margin: 0;
}

.node-button {
  min-height: 3rem;
  padding: 0.65rem 1.75rem;
  border: 2px solid var(--blue);
  border-radius: var(--node-radius);
  background: var(--blue);
  color: var(--brand-light-on-accent);
  font: inherit;
  font-weight: 500;
  cursor: pointer;
}

.node-button:hover {
  background: var(--blue-deep);
  border-color: var(--blue-deep);
}

/* ---------- Thank you: terminal node with three exits ---------- */

.terminal-split {
  display: grid;
  gap: 2rem;
}

.terminal-node {
  padding: clamp(1.25rem, 4vw, 2.25rem);
  border-width: 2.5px;
  border-color: var(--ink);
}

.terminal-node .prose {
  margin-top: 1.25rem;
}

.exit-list {
  position: relative;
  margin: 0;
  padding: 0 0 0 1.75rem;
  list-style: none;
  display: grid;
  gap: 0.9rem;
  border-left: 1.5px solid var(--ink);
}

.exit-node {
  position: relative;
  border: 1.5px solid var(--code);
  border-left-width: 4px;
  border-radius: var(--node-radius);
}

.exit-node::before {
  content: "";
  position: absolute;
  left: calc(-1.75rem - 4px);
  top: 50%;
  width: 1.75rem;
  height: 2px;
  background: var(--code);
}

.exit-node a {
  display: flex;
  align-items: center;
  min-height: 3rem;
  padding: 0.5rem 1rem;
  font-weight: 500;
  text-decoration: none;
}

.exit-node a:hover {
  text-decoration: underline;
}

@media (min-width: 60rem) {
  .terminal-split {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: center;
    gap: 3rem;
  }
}

/* ---------- Footer ---------- */

.site-footer {
  margin-top: auto;
  padding: clamp(1.5rem, 4vw, 2.25rem) var(--gutter);
  border-top: 1.5px solid var(--wire-soft);
}

.footer-inner {
  max-width: 68rem;
  display: grid;
  gap: 0.4rem;
}

.footer-name {
  margin: 0;
  font-weight: 500;
  font-size: 1.1rem;
}

.footer-line {
  margin: 0;
}

.footer-area-list {
  margin: 0.25rem 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0 1.5rem;
}

.footer-area-list a {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
}

.footer-key {
  margin: 0.5rem 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  font-size: 0.92rem;
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
}