/* Guardian Angel v2 — design system for informatics, AI, and healthcare policy audiences */

:root {
  --bg: #fafaf7;
  --surface: #ffffff;
  --surface-2: #f3f1ec;
  --ink: #15171c;
  --ink-2: #4a4d55;
  --ink-3: #7a7c83;
  --rule: #e5e2db;
  --rule-strong: #cfcbc0;
  --accent: #1f3a5f;
  --accent-2: #2a5283;
  --highlight: #b8853a;
  --positive: #2e6b3f;
  --warn: #8a3a2a;

  --serif: "Fraunces", Georgia, serif;
  --sans: "Manrope", "Inter", system-ui, sans-serif;
  --mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, monospace;

  --max: 1100px;
  --gutter: clamp(1.25rem, 3vw, 2.5rem);
  --radius-sm: 4px;
  --radius: 8px;
  --radius-lg: 14px;

  --shadow-1: 0 1px 2px rgba(0,0,0,0.04), 0 4px 16px rgba(0,0,0,0.04);
}

[data-theme="dark"] {
  --bg: #0e1014;
  --surface: #161a20;
  --surface-2: #1c2129;
  --ink: #ececec;
  --ink-2: #b7bbc2;
  --ink-3: #898d96;
  --rule: #2a2f38;
  --rule-strong: #3d434e;
  --accent: #7fb3e2;
  --accent-2: #a0c8eb;
  --highlight: #d8b574;
  --positive: #7ac28b;
  --warn: #d68866;
  --shadow-1: 0 1px 2px rgba(0,0,0,0.4), 0 4px 16px rgba(0,0,0,0.3);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--accent-2); }

p { margin: 0 0 0.9em; }

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 0 0 0.6em;
  color: var(--ink);
}

h1 { font-size: clamp(2.1rem, 4.4vw, 3.2rem); font-weight: 600; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.55rem, 2.6vw, 2.05rem); }
h3 { font-size: 1.18rem; font-family: var(--sans); font-weight: 700; letter-spacing: -0.005em; }
h4 { font-size: 1rem; font-family: var(--sans); font-weight: 700; }

code, .mono { font-family: var(--mono); font-size: 0.92em; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 0.8em;
  display: inline-block;
}

/* Header */
.site-header {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.4rem var(--gutter) 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--ink);
}

.brand-mark {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.6rem;
  border: 1.5px solid var(--ink);
  width: 2.2rem;
  height: 2.2rem;
  display: grid;
  place-items: center;
  line-height: 1;
  letter-spacing: -0.02em;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-copy span:first-child {
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 600;
}

.brand-copy span:last-child {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--ink-3);
  letter-spacing: 0.04em;
  margin-top: 2px;
}

.site-nav {
  display: flex;
  gap: 1.4rem;
  align-items: center;
  flex-wrap: wrap;
}

.site-nav a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink-2);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1.5px solid transparent;
}

.site-nav a:hover { color: var(--ink); }
.site-nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

.theme-toggle {
  background: none;
  border: 1px solid var(--rule);
  color: var(--ink-2);
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.theme-toggle:hover { color: var(--ink); border-color: var(--rule-strong); }

/* Layout */
main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter) 4rem;
}

.section {
  padding: 3.2rem 0;
  border-top: 1px solid var(--rule);
}

.section:first-of-type { border-top: none; padding-top: 2rem; }

.section-heading { margin-bottom: 1.8rem; max-width: 760px; }
.section-heading p { color: var(--ink-2); font-size: 1.05rem; }

/* Hero */
.hero {
  padding: 2.5rem 0 3rem;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.hero h1 { margin-bottom: 1rem; }
.hero-lede { font-size: 1.12rem; color: var(--ink-2); max-width: 36ch; }

.hero-actions { margin-top: 1.4rem; display: flex; gap: 0.8rem; flex-wrap: wrap; }

.button {
  display: inline-block;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.94rem;
  padding: 0.7rem 1.1rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  border: 1.5px solid transparent;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.button-primary { background: var(--accent); color: #fff; }
.button-primary:hover { background: var(--accent-2); color: #fff; }

.button-secondary {
  background: transparent;
  color: var(--ink);
  border-color: var(--rule-strong);
}
.button-secondary:hover { border-color: var(--ink); }

[data-theme="dark"] .button-primary { color: var(--bg); }

/* In-page nav */
.page-nav-shell {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.page-nav-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 0.4rem;
}

.page-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--rule);
}

.page-nav a {
  font-size: 0.88rem;
  color: var(--ink-2);
  text-decoration: none;
  padding: 0.2rem 0;
  border-bottom: 1.5px solid transparent;
}
.page-nav a:hover { color: var(--ink); }
.page-nav a.is-active { color: var(--ink); border-bottom-color: var(--accent); }

/* Replacement map */
.replacement-map {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
}

.replacement-map > div {
  padding: 1.6rem 1.4rem;
}

.replacement-map .col-keep {
  background: var(--surface-2);
}

.replacement-map h3 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.9rem;
}

.replacement-map h3 .tag {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--ink);
  color: var(--bg);
  padding: 0.2rem 0.45rem;
  border-radius: 3px;
}

.replacement-map .col-take h3 .tag { background: var(--accent); color: #fff; }

.replacement-map ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.replacement-map li {
  padding: 0.45rem 0;
  border-top: 1px dashed var(--rule);
  color: var(--ink-2);
  font-size: 0.96rem;
}
.replacement-map li:first-child { border-top: none; }

.replacement-map .arrow {
  display: grid;
  place-items: center;
  background: var(--surface-2);
  border-left: 1px solid var(--rule);
  border-right: 1px solid var(--rule);
  font-family: var(--mono);
  color: var(--ink-3);
  font-size: 1.2rem;
}

/* Forces grid (the five forces) */
.forces {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.2rem;
  margin-top: 1.4rem;
}

.force {
  border-left: 2px solid var(--accent);
  padding: 0.2rem 0 0.4rem 1rem;
}

.force .n {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--ink-3);
  letter-spacing: 0.08em;
}

.force h3 {
  margin: 0.3rem 0 0.45rem;
  font-size: 1.05rem;
}

.force p {
  font-size: 0.96rem;
  color: var(--ink-2);
  margin: 0;
}

/* Proposition list */
.proposition {
  display: grid;
  gap: 1.2rem;
}

.proposition-row {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 1.4rem;
  align-items: baseline;
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--rule);
}

.proposition-row:last-child { border-bottom: none; padding-bottom: 0; }

.proposition-row h3 {
  font-family: var(--serif);
  font-size: 1.18rem;
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.01em;
}

.proposition-row p {
  color: var(--ink-2);
  margin: 0;
}

/* Vignettes */
.vignette {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 1.6rem;
  margin-bottom: 1.2rem;
}

.vignette .scenario-tag {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}

.vignette h3 {
  font-family: var(--serif);
  font-size: 1.3rem;
  margin: 0.3rem 0 0.8rem;
}

.vignette .ehr-vs-ga {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
}

.vignette .panel {
  padding: 1rem;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  font-size: 0.94rem;
}

.vignette .panel h4 {
  font-size: 0.82rem;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-3);
  margin: 0 0 0.5rem;
}

.vignette .panel.ga {
  background: linear-gradient(180deg, rgba(31,58,95,0.06), transparent);
  border: 1px solid rgba(31,58,95,0.2);
}

/* Citations */
.cit {
  font-family: var(--mono);
  font-size: 0.72em;
  vertical-align: super;
  color: var(--accent);
  text-decoration: none;
  padding: 0 0.1em;
}
.cit:hover { color: var(--accent-2); }

.references {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 1.4rem 1.6rem;
  font-size: 0.92rem;
}

.references ol { padding-left: 1.3rem; margin: 0.4rem 0 0; }
.references li { color: var(--ink-2); margin-bottom: 0.6rem; }

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
}

.stat {
  padding: 1.3rem 1.4rem;
  border-right: 1px solid var(--rule);
}
.stat:last-child { border-right: none; }

.stat .figure {
  font-family: var(--serif);
  font-size: 2.05rem;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.02em;
  line-height: 1;
  display: block;
}

.stat .figure-sub {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--ink-3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-top: 0.4rem;
  display: block;
}

.stat .figure-label {
  font-size: 0.9rem;
  color: var(--ink-2);
  margin-top: 0.6rem;
}

/* Architecture diagram container */
.arch-figure {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 1.4rem;
  overflow: auto;
}

.arch-figure svg { max-width: 100%; height: auto; display: block; margin: 0 auto; }

.arch-figure figcaption {
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--ink-3);
  letter-spacing: 0.04em;
  margin-top: 0.8rem;
  text-align: center;
}

/* Tagged list (used for governance, engage) */
.tagged-list { display: grid; gap: 0.9rem; }

.tagged-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 1.2rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
}

.tagged-row:last-child { border-bottom: none; }

.tagged-row .tag {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--surface-2);
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-sm);
  align-self: start;
  text-align: center;
}

.tagged-row h3 { margin: 0 0 0.3rem; font-size: 1.05rem; }
.tagged-row p { margin: 0; color: var(--ink-2); font-size: 0.97rem; }

/* Pull quote */
.pull {
  font-family: var(--serif);
  font-size: 1.5rem;
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--ink);
  padding: 1.4rem 1.6rem;
  border-left: 3px solid var(--accent);
  background: var(--surface);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.6rem 0;
}

.pull em { font-style: italic; }

/* Compared-with-what */
.compared {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.4rem 0;
}

.compared .col {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 1.4rem;
}

.compared .col.now { background: var(--surface-2); }
.compared .col.ga { border-color: rgba(31,58,95,0.35); }

.compared h4 {
  font-family: var(--mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-3);
  margin-bottom: 0.6rem;
}

.compared h5 {
  font-family: var(--serif);
  font-size: 1.1rem;
  margin: 0 0 0.6rem;
  font-weight: 600;
}

.compared ul {
  margin: 0;
  padding-left: 1rem;
  color: var(--ink-2);
}

.compared ul li { margin-bottom: 0.3rem; font-size: 0.94rem; }

/* Footer */
.site-footer {
  max-width: var(--max);
  margin: 2rem auto 0;
  padding: 2rem var(--gutter) 3rem;
  border-top: 1px solid var(--rule);
  font-size: 0.9rem;
  color: var(--ink-3);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: end;
}

.site-footer p { margin: 0; }
.site-footer a { color: var(--ink-2); }

/* Engage form */
.engage-form {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 1.4rem;
  display: grid;
  gap: 0.8rem;
  max-width: 540px;
}

.engage-form label {
  font-size: 0.82rem;
  font-family: var(--mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.engage-form input,
.engage-form select,
.engage-form textarea {
  font-family: var(--sans);
  font-size: 0.95rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--ink);
}

.engage-form button {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.7rem 1rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  justify-self: start;
}

.engage-form button:hover { background: var(--accent-2); }

/* Mobile */
@media (max-width: 720px) {
  .hero { grid-template-columns: 1fr; gap: 1.4rem; }
  .replacement-map { grid-template-columns: 1fr; }
  .replacement-map .arrow { padding: 0.6rem; border-left: none; border-right: none; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
  .proposition-row { grid-template-columns: 1fr; gap: 0.4rem; }
  .vignette .ehr-vs-ga { grid-template-columns: 1fr; }
  .compared { grid-template-columns: 1fr; }
  .tagged-row { grid-template-columns: 1fr; gap: 0.4rem; }
  .stat { border-right: none; border-bottom: 1px solid var(--rule); }
  .stat:last-child { border-bottom: none; }
  .site-footer { grid-template-columns: 1fr; }
}

/* Reveal */
.reveal { opacity: 0; transform: translateY(8px); transition: opacity 0.5s ease, transform 0.5s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* ===== Manifesto page (the 1994 technical report) ===== */

.manifesto { max-width: 940px; margin: 0 auto; }

.manifesto-hero { padding-top: 2.4rem; }
.manifesto-hero h1 {
  font-family: var(--serif);
  font-size: clamp(1.9rem, 3.6vw, 2.8rem);
  line-height: 1.15;
  margin: 0.6rem 0 0.9rem;
}
.manifesto-byline {
  font-family: var(--sans);
  font-weight: 600;
  color: var(--ink);
  margin: 0 0 0.3rem;
}
.manifesto-meta {
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  color: var(--ink-3);
  text-transform: uppercase;
  margin: 0 0 1.4rem;
}
.manifesto-context {
  font-size: 1.02rem;
  color: var(--ink-2);
  max-width: 64ch;
  border-left: 3px solid var(--accent);
  padding: 0.1rem 0 0.1rem 1rem;
  margin: 0 0 1.4rem;
}

.manifesto-toc { padding-top: 1.4rem; }
.manifesto-toc ul {
  margin: 0;
  padding-left: 1.1rem;
  font-family: var(--sans);
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--ink-2);
}
.manifesto-toc ul ul { margin-top: 0.25rem; margin-bottom: 0.4rem; }
.manifesto-toc li { margin: 0.18rem 0; }
.manifesto-toc a {
  text-decoration: none;
  color: var(--ink-2);
  border-bottom: 1px solid transparent;
}
.manifesto-toc a:hover {
  color: var(--ink);
  border-bottom-color: var(--rule-strong);
}

.manifesto-body {
  font-family: var(--serif);
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--ink);
}
.manifesto-body p { margin: 0 0 1.05em; max-width: 72ch; }
.manifesto-body h2 {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 2.4vw, 1.9rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 2.4rem 0 0.7rem;
  scroll-margin-top: 1.2rem;
}
.manifesto-body h3 {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 600;
  margin: 1.8rem 0 0.5rem;
  scroll-margin-top: 1.2rem;
}
.manifesto-body h4 {
  font-family: var(--sans);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0;
  margin: 1.3rem 0 0.4rem;
  scroll-margin-top: 1.2rem;
}
.manifesto-body h5, .manifesto-body h6 {
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-2);
  margin: 1.1rem 0 0.35rem;
}
.manifesto-body ul, .manifesto-body ol {
  margin: 0 0 1.05em;
  padding-left: 1.4rem;
  max-width: 72ch;
}
.manifesto-body li { margin: 0.25rem 0; }
.manifesto-body blockquote {
  margin: 1em 0;
  padding: 0.2em 1em;
  border-left: 3px solid var(--rule-strong);
  color: var(--ink-2);
  font-style: italic;
  max-width: 72ch;
}
.manifesto-body hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 2rem 0;
}
.manifesto-body code {
  font-family: var(--mono);
  font-size: 0.92em;
  background: var(--surface-2);
  padding: 0.05em 0.35em;
  border-radius: 3px;
}
.manifesto-body pre {
  font-family: var(--mono);
  font-size: 0.88rem;
  background: var(--surface-2);
  border: 1px solid var(--rule);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1rem;
  overflow-x: auto;
  max-width: 72ch;
}
.manifesto-body table {
  border-collapse: collapse;
  margin: 1em 0;
  font-family: var(--sans);
  font-size: 0.95rem;
}
.manifesto-body th, .manifesto-body td {
  border: 1px solid var(--rule-strong);
  padding: 0.45rem 0.7rem;
  text-align: left;
}
.manifesto-body th { background: var(--surface-2); font-weight: 700; }
.manifesto-body a { color: var(--accent); }
.manifesto-body sup a { text-decoration: none; }

.manifesto-body .footnotes {
  margin-top: 2.5rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--rule);
  font-size: 0.92rem;
  color: var(--ink-2);
}
.manifesto-body .footnotes ol { padding-left: 1.3rem; }
.manifesto-body .footnote-back { margin-left: 0.3em; text-decoration: none; }