:root {
  /* Brand: navy, yellow, bordeaux, black, white */
  --navy: #14213d;
  --yellow: #c9a646;   /* muted gold */
  --bordeaux: #6d1f2b; /* wine red, no pink cast */
  --bg: #ffffff;
  --bg-alt: #f4f6fa;
  --surface: #ffffff;
  --ink: #111111;
  --muted: #4a4f5c;
  --line: #e3e6ec;
  --accent: var(--navy);        /* buttons, links */
  --accent-ink: #ffffff;
  --label: var(--bordeaux);     /* small section labels, step numbers */
  --rule: var(--navy);
  --mark: var(--yellow);        /* non-text accents only: yellow text on white is unreadable */
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --radius: 14px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1322; --bg-alt: #111a2d; --surface: #141c30; --ink: #f5f6f8; --muted: #a9b0c0; --line: #242d45;
    --accent: #eef0f4; --accent-ink: var(--navy); --label: var(--yellow); --rule: #5b6a8f; color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.65 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--label); }
:focus-visible { outline: 3px solid var(--mark); outline-offset: 2px; }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; line-height: 1.18; letter-spacing: -0.01em; margin: 0 0 .5em; }
h1 { font-size: clamp(2.3rem, 5.5vw, 3.9rem); }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.3rem); margin-bottom: 1.2em; }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 720px) { .wrap { padding: 0 32px; } }
.wrap.narrow { max-width: 760px; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); }
.bar { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; flex-wrap: wrap; }
.brand { font-family: var(--serif); font-weight: 600; font-size: 1.15rem; color: var(--ink); text-decoration: none; }
nav { display: flex; gap: 18px; font-size: .95rem; flex-wrap: wrap; }
nav a { color: var(--muted); text-decoration: none; }
nav a:hover { color: var(--ink); }
nav .nav-cta { color: var(--accent); font-weight: 600; }
@media (max-width: 640px) { nav a:not(.nav-cta):not([href="/writing/"]) { display: none; } }
.site-header { border-bottom: 1px solid var(--line); }

/* Hero */
.hero { padding: clamp(56px, 10vw, 120px) 0 clamp(48px, 7vw, 88px); }
.eyebrow { font-size: .8rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--label); margin-bottom: 1em; display: flex; align-items: center; gap: 10px; }
.eyebrow::before { content: ""; width: 22px; height: 3px; background: var(--mark); border-radius: 2px; flex: none; }
.eyebrow a { color: inherit; text-decoration: none; }
.lead { font-size: clamp(1.08rem, 2vw, 1.25rem); color: var(--muted); max-width: 44em; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 28px 0; }
.btn { display: inline-block; padding: 12px 22px; border-radius: 999px; background: var(--accent); color: var(--accent-ink); font-weight: 600; text-decoration: none; border: 1.5px solid var(--accent); transition: transform .15s ease, opacity .15s; }
.btn:hover { transform: translateY(-1px); opacity: .92; color: var(--accent-ink); }
.btn.ghost:hover { color: var(--accent); }
.btn.ghost { background: transparent; color: var(--accent); }
.creds { list-style: none; padding: 0; margin: 36px 0 0; display: flex; flex-wrap: wrap; gap: 8px 10px; }
.creds li { font-size: .88rem; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 5px 13px; background: var(--surface); }

/* Sections */
.section { padding: clamp(56px, 8vw, 96px) 0; }
.section.alt { background: var(--bg-alt); }
.grid { display: grid; gap: 20px; }
.grid.three { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid.two { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.card, .work, .quote { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; }
.card .q { font-family: var(--serif); font-style: italic; font-size: 1.12rem; color: var(--ink); }
.card h3 { font-family: var(--sans); font-size: 1rem; letter-spacing: .01em; }
.card p:not(.q):not(.for) { color: var(--muted); font-size: .97rem; }
.for { font-size: .85rem; font-weight: 600; color: var(--accent); margin: 0; }
.tag { font-size: .78rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-bottom: .6em; }
.work p { color: var(--muted); font-size: .97rem; }
.more { font-weight: 600; text-decoration: none; }
.steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); counter-reset: s; }
.steps li { counter-increment: s; border-top: 2px solid var(--rule); padding-top: 18px; }
.steps li::before { content: "0" counter(s); font-family: var(--mono); font-size: .85rem; color: var(--label); }
.steps p { color: var(--muted); font-size: .97rem; }
.quotes { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.quote { margin: 0; }
.quote blockquote { margin: 0 0 16px; font-family: var(--serif); font-size: 1.1rem; }
.quote figcaption { display: flex; flex-direction: column; font-size: .92rem; }
.quote figcaption span { color: var(--muted); }
.contact h2 { margin-bottom: .6em; }
.socials a { margin-right: 16px; }

.path { border-top: 3px solid var(--mark) !important; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; display: flex; flex-direction: column; scroll-margin-top: 90px; }
.path > .btn, .path .actions { margin-top: auto; }
.path > .btn { align-self: flex-start; }
.path h3 { font-size: 1.4rem; }
.path > p { color: var(--muted); }
.steps.compact { grid-template-columns: 1fr; gap: 14px; margin-bottom: 24px; }
.steps.compact li { border-top-width: 1px; padding-top: 12px; }
.steps h4 { font-size: 1rem; margin: 4px 0 4px; }
.steps.compact p { margin: 0; }
.facts { list-style: none; padding: 0; margin: 0 0 24px; }
.facts li { display: grid; grid-template-columns: 8.5em 1fr; gap: 12px; padding: 10px 0; border-top: 1px solid var(--line); font-size: .95rem; }
.facts strong { font-weight: 600; }
.facts span { color: var(--muted); }
@media (max-width: 520px) { .facts li { grid-template-columns: 1fr; gap: 2px; } }
.actions.tight { margin: 0; }

/* Writing */
.post-list { list-style: none; padding: 0; margin: 0 0 1.5em; }
.post-list li { border-top: 1px solid var(--line); }
.post-list li:last-child { border-bottom: 1px solid var(--line); }
.post-list a { display: flex; flex-direction: column; gap: 2px; padding: 16px 0 4px; text-decoration: none; }
.post-title { font-family: var(--serif); font-size: 1.2rem; color: var(--ink); font-weight: 600; }
.post-desc { color: var(--muted); font-size: .95rem; }
.post-list time { display: block; font-size: .82rem; color: var(--muted); padding-bottom: 14px; }
.draft { font: 600 .7rem var(--sans); text-transform: uppercase; letter-spacing: .08em; color: var(--label); border: 1px solid var(--label); border-radius: 4px; padding: 1px 5px; vertical-align: middle; }
.page { padding-top: clamp(40px, 7vw, 80px); padding-bottom: 80px; }
.page h1 { font-size: clamp(2rem, 4.5vw, 2.9rem); }
.prose { font-size: 1.06rem; }
.prose h2 { font-size: 1.55rem; margin: 1.8em 0 .6em; }
.prose h3 { margin-top: 1.5em; }
.prose img { max-width: 100%; height: auto; border-radius: 8px; }
.prose pre { background: var(--bg-alt); border: 1px solid var(--line); border-radius: 10px; padding: 16px; overflow-x: auto; font-size: .9rem; }
.prose code { font-family: var(--mono); font-size: .9em; }
.prose table { border-collapse: collapse; width: 100%; display: block; overflow-x: auto; font-size: .95rem; }
.prose th, .prose td { border-bottom: 1px solid var(--line); padding: 8px 10px; text-align: left; }
.prose blockquote { margin: 1.2em 0; padding-left: 18px; border-left: 3px solid var(--mark); color: var(--muted); }
.prose .katex-display { overflow-x: auto; overflow-y: hidden; }
.post-cta { margin-top: 48px; padding: 20px 24px; border-radius: var(--radius); background: var(--bg-alt); border: 1px solid var(--line); }
.post-cta p { margin: 0; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; padding: 12px 0; }
.site-footer a { color: var(--muted); }

/* Multi-page layout */
.page-head { padding: clamp(48px, 8vw, 96px) 0 8px; }
.page-head h1 { font-size: clamp(2.1rem, 4.8vw, 3.2rem); max-width: 18em; }
.section.tight-top { padding-top: clamp(28px, 4vw, 48px); }
h2.small { font-size: 1.35rem; margin-bottom: .7em; }
.pillars { display: grid; gap: 0; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); border-top: 1px solid var(--line); }
.pillars a { display: block; padding: 22px 24px 22px 0; text-decoration: none; color: inherit; border-bottom: 1px solid var(--line); }
.pillars a:hover h3 { color: var(--label); }
.pillars h3 { font-size: 1.15rem; margin-bottom: .35em; color: var(--ink); }
.pillars p { color: var(--muted); font-size: .96rem; margin: 0; }
.after-grid { margin: 24px 0 0; }
.service { display: grid; gap: 24px 48px; grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr); padding: 40px 0; border-top: 1px solid var(--line); scroll-margin-top: 80px; }
.service:first-child { border-top: 0; padding-top: 8px; }
.service h2 { font-size: 1.6rem; margin-bottom: .5em; }
.service .q { font-family: var(--serif); font-style: italic; font-size: 1.1rem; color: var(--muted); }
.service h4 { font-size: .8rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin: 0 0 .6em; }
.service p { color: var(--muted); }
@media (max-width: 760px) { .service { grid-template-columns: 1fr; } }
.bullets { margin: 0 0 1.4em; padding-left: 1.1em; color: var(--ink); }
.bullets li { margin-bottom: .35em; }
.bullets li::marker { color: var(--label); }
.expect > div { border-left: 3px solid var(--mark); padding-left: 18px; }
.expect h3 { font-family: var(--sans); font-size: 1.02rem; margin-bottom: .3em; }
.expect p { color: var(--muted); margin: 0; }
.timeline { list-style: none; padding: 0; margin: 32px 0 0; border-top: 1px solid var(--line); }
.timeline li { display: grid; grid-template-columns: 8.5em 1fr; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.timeline span { font-family: var(--mono); font-size: .85rem; color: var(--label); padding-top: 3px; }
.timeline p { margin: 0; color: var(--muted); font-size: .95rem; }
@media (max-width: 520px) { .timeline li { grid-template-columns: 1fr; gap: 2px; } }
.topics { display: grid; gap: 24px; }
.topics h3 { font-size: 1.15rem; margin-bottom: .3em; }
.topics p { color: var(--muted); margin: 0; }
.section .btn { margin-top: 8px; }
.cta-band { background: var(--navy); color: #fff; padding: 40px 0; }
.cta-band h2 { color: #fff; margin: 0; font-size: clamp(1.4rem, 3vw, 1.9rem); }
.cta-band .btn { background: #fff; color: var(--navy); border-color: #fff; }
.cta-band .btn:hover { color: var(--navy); }
@media (prefers-color-scheme: dark) { .cta-band { background: #182443; } }
.contact-actions { margin-top: 32px; }
.note { color: var(--muted); font-style: italic; }
.path .tag { color: var(--label); }
.grid.expect { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 40px; max-width: 860px; }
@media (max-width: 640px) { .grid.expect { grid-template-columns: 1fr; } }

.cta-band .actions.tight { margin: 0; }
.btn.ghost-light { background: transparent; color: #fff; border-color: rgba(255,255,255,.6); }
.btn.ghost-light:hover { color: #fff; border-color: #fff; }
.prose figure { margin: 2em 0; }
.prose figure img { display: block; margin: 0 auto; }
.prose figcaption { margin-top: 10px; font-size: .9rem; color: var(--muted); text-align: center; }

.muted-lead { color: var(--muted); }
.pubs { padding-left: 1.3em; margin: 24px 0; }
.pubs li { margin-bottom: 18px; padding-left: 4px; }
.pubs li::marker { color: var(--label); font-family: var(--mono); font-size: .85rem; }
.pubs a { font-weight: 600; text-decoration: none; color: var(--ink); }
.pubs a:hover { color: var(--label); }
.pubs .authors, .pubs .venue { display: block; font-size: .92rem; color: var(--muted); }
.pubs .authors strong { color: var(--ink); font-weight: 600; }
.thesis { font-size: .95rem; color: var(--muted); }
.projects { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.projects li { padding: 14px 0; border-bottom: 1px solid var(--line); }
.projects a { font-weight: 600; text-decoration: none; color: var(--ink); display: block; }
.projects a:hover { color: var(--label); }
.projects span { color: var(--muted); font-size: .95rem; }