:root {
  color-scheme: light;
  --ink: #111;
  --ink-soft: #444;
  --ink-faint: #777;
  --paper: #fdfdfb;
  --rule: #e5e3dd;
  --link: #1c4ed8;
  --link-hover: #0f2c8c;
  --measure: 38rem;
}

* { box-sizing: border-box; }

html {
  font-size: 17px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Iowan Old Style", "Charter", "Cambria", "Georgia", ui-serif, serif;
  line-height: 1.65;
  font-feature-settings: "kern", "liga", "onum";
}

main {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 5rem 1.5rem 6rem;
}

.paper-head {
  margin-bottom: 3rem;
}

.logo {
  width: 1em;
  height: 1em;
  filter: grayscale(1) contrast(0.92) brightness(0.95);
  opacity: 0.9;
}

.eyebrow {
  font-family: ui-monospace, "SF Mono", "Menlo", "Consolas", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 1.25rem;
}

h1 {
  font-size: 2.4rem;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 0.4rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.2em;
}

.subtitle {
  font-size: 1.15rem;
  color: var(--ink-soft);
  font-style: italic;
  margin: 0 0 1.2rem;
}

.meta {
  font-family: ui-monospace, "SF Mono", "Menlo", "Consolas", monospace;
  font-size: 0.82rem;
  color: var(--ink-faint);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.meta a { color: inherit; }

h2 {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  margin: 2.8rem 0 0.8rem;
}

section + section { margin-top: 0.5rem; }

p {
  margin: 0 0 1.1rem;
}

.abstract {
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 1.25rem 0;
  margin: 2rem 0 2.5rem;
}

.abstract h2 {
  font-family: ui-monospace, "SF Mono", "Menlo", "Consolas", monospace;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  margin: 0 0 0.6rem;
}

.abstract p {
  margin: 0;
  font-size: 0.98rem;
  color: var(--ink-soft);
}

ul, ol {
  padding-left: 1.25rem;
  margin: 0 0 1.1rem;
}

li { margin: 0.35rem 0; }

ul.areas li { margin: 0.7rem 0; }

ol.projects {
  list-style: none;
  padding: 0;
  border-top: 1px solid var(--rule);
}

ol.projects li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--rule);
  font-size: 0.95rem;
}

.project-title { font-weight: 500; }
.project-note { color: var(--ink-faint); font-style: italic; }

.muted { color: var(--ink-faint); font-style: italic; }

a {
  color: var(--link);
  text-decoration: underline;
  text-decoration-thickness: 0.5px;
  text-underline-offset: 2px;
}

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

em { font-style: italic; }
strong { font-weight: 600; color: var(--ink); }

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 3rem 0 1.5rem;
}

footer .colophon {
  font-size: 0.82rem;
  color: var(--ink-faint);
  font-style: italic;
}

/* ──────────────────────────────────────────────────────────
   Post pages
   ────────────────────────────────────────────────────────── */

article.post .post-head h1 {
  display: block;
  font-size: 2rem;
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin: 0 0 1rem;
}

.eyebrow .back-link {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px dotted var(--ink-faint);
}

.eyebrow .back-link:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

.post-body p {
  font-size: 1rem;
}

.post-body h2 {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.005em;
  margin: 2.4rem 0 0.9rem;
}

.post-body ul,
.post-body ol {
  padding-left: 1.4rem;
}

.post-body li {
  margin: 0.6rem 0;
}

.post-body hr {
  margin: 2.6rem auto;
  width: 4rem;
  border-top: 1px solid var(--rule);
}

.post-coda {
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin-top: 1.4rem;
}

.post-coda em { font-style: italic; }

/* Code */

code {
  font-family: ui-monospace, "SF Mono", "Menlo", "Consolas", monospace;
  font-size: 0.86em;
  background: #f1ecdb;
  padding: 0.05em 0.32em;
  border-radius: 3px;
  color: #2a2a2a;
}

a code {
  color: inherit;
  background: transparent;
  padding: 0;
}

pre {
  font-family: ui-monospace, "SF Mono", "Menlo", "Consolas", monospace;
  font-size: 0.82rem;
  line-height: 1.55;
  background: #f6f2e3;
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 0.95rem 1.1rem;
  overflow-x: auto;
  margin: 1.4rem 0;
  color: #2a2a2a;
}

pre code {
  background: none;
  padding: 0;
  font-size: inherit;
  color: inherit;
  border-radius: 0;
}

/* Tables */

.table-wrap {
  overflow-x: auto;
  margin: 1.4rem 0;
}

.post-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.post-body thead th {
  font-weight: 600;
  text-align: left;
  padding: 0.55rem 0.7rem;
  border-bottom: 1px solid var(--ink-faint);
  font-family: ui-monospace, "SF Mono", "Menlo", "Consolas", monospace;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  white-space: nowrap;
}

.post-body tbody td {
  padding: 0.55rem 0.7rem;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}

.post-body tbody tr:last-child td {
  border-bottom: none;
}

.post-body th:first-child,
.post-body td:first-child {
  padding-left: 0;
}

.post-body th:last-child,
.post-body td:last-child {
  padding-right: 0;
}

/* Mermaid diagrams */

figure.diagram {
  margin: 1.8rem 0;
  padding: 0;
  text-align: center;
}

figure.diagram .mermaid {
  display: inline-block;
  font-family: "Iowan Old Style", Charter, Cambria, Georgia, ui-serif, serif;
  font-size: 0.95rem;
  max-width: 100%;
  overflow-x: auto;
}

/* Subtle widen of diagrams on roomy viewports */
@media (min-width: 56rem) {
  figure.diagram {
    margin-left: -3rem;
    margin-right: -3rem;
  }
}

/* Post footer / back link */

.post-footer {
  margin-top: 3rem;
}

.post-footer .back {
  font-family: ui-monospace, "SF Mono", "Menlo", "Consolas", monospace;
  font-size: 0.82rem;
  margin-bottom: 1.5rem;
}

.post-footer .back a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px dotted var(--ink-faint);
}

.post-footer .back a:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

/* ──────────────────────────────────────────────────────────
   Responsive
   ────────────────────────────────────────────────────────── */

@media (max-width: 480px) {
  html { font-size: 16px; }
  main { padding: 3rem 1.2rem 4rem; }
  h1 { font-size: 2rem; }
  article.post .post-head h1 { font-size: 1.65rem; }
  .post-body table { font-size: 0.85rem; }
  pre { font-size: 0.78rem; }
}

::selection { background: #ffe98a; color: #111; }