/* ---------- tokens ---------- */
:root {
  --text:      #1f2328;
  --text-soft: #57606a;
  --text-faint:#8c959f;
  --bg:        #ffffff;
  --rule:      #e6e8eb;
  --link:      #1a56a8;
  --link-hover:#0f3d7d;

  --measure: 58rem;          /* text column width */
  --pad: 1.5rem;

  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}
[id] { scroll-margin-top: 1.5rem; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; }

a {
  color: var(--link);
  text-decoration: none;
}
a:hover { color: var(--link-hover); text-decoration: underline; }

/* ---------- header ---------- */
.site-header {
  width: 100%;
  max-width: var(--measure);
  margin: 0 auto;
  padding: 2.25rem var(--pad) 0;
  flex: 0 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
}

.site-name {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-soft);
  letter-spacing: -0.005em;
}
.site-name:hover { color: var(--text); text-decoration: none; }

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}
.site-nav a {
  color: var(--text-soft);
  font-size: 0.9375rem;
}
.site-nav a:hover { color: var(--text); text-decoration: none; }

/* ---------- main ---------- */
.site-main {
  width: 100%;
  max-width: var(--measure);
  margin: 0 auto;
  padding: 2.5rem var(--pad) 4rem;
  flex: 1 0 auto;
}

h1, h2, h3 {
  line-height: 1.3;
  letter-spacing: -0.015em;
  font-weight: 600;
}

.page-title { font-size: 1.875rem; margin: 0 0 1.25rem; }

h2 {
  font-size: 0.9375rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 3rem 0 1.1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--rule);
}

h3 { font-size: 1.0625rem; margin: 1.75rem 0 0.5rem; }

p { margin: 0 0 1.1rem; }

ul, ol { margin: 0 0 1.1rem; padding-left: 1.25rem; }
li { margin-bottom: 0.4rem; }

hr { border: 0; border-top: 1px solid var(--rule); margin: 2.5rem 0; }

blockquote {
  margin: 1.5rem 0;
  padding-left: 1rem;
  border-left: 3px solid var(--rule);
  color: var(--text-soft);
}

code {
  font-family: var(--mono);
  font-size: 0.875em;
  background: #f5f6f7;
  padding: 0.15em 0.35em;
  border-radius: 3px;
}
pre {
  background: #f5f6f7;
  padding: 1rem;
  border-radius: 6px;
  overflow-x: auto;
}
pre code { background: none; padding: 0; font-size: 0.875rem; }

table { width: 100%; border-collapse: collapse; margin: 0 0 1.1rem; }
th, td { text-align: left; padding: 0.5rem 0.75rem; border-bottom: 1px solid var(--rule); }

/* ---------- intro (photo + text) ---------- */
.intro {
  display: flex;
  align-items: center;
  gap: 3.5rem;
  margin-bottom: 0.5rem;
}

.intro-text { flex: 1 1 auto; min-width: 0; }
.intro-text > :first-child { margin-top: 0; }

.intro-photo {
  flex: 0 0 auto;
  width: 260px;
  order: 2;
}
.intro-photo img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 6px;
  display: block;
}

.intro h1 {
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin: 0 0 1.25rem;
}

/* ---------- inline link row ---------- */
.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.85rem;
  margin: 0 0 1.1rem;
  font-size: 0.9375rem;
}
.links .sep { color: var(--text-faint); }

/* ---------- lists of things (projects / publications / posts) ---------- */
.entry-list { list-style: none; margin: 0; padding: 0; }

.entry {
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--rule);
}
.entry:last-child { border-bottom: 0; }

.entry-title {
  display: block;
  font-size: 1.0625rem;
  font-weight: 600;
  margin: 0 0 0.25rem;
}
.entry-title a { color: var(--text); }
.entry-title a:hover { color: var(--link); text-decoration: none; }

.entry-meta {
  color: var(--text-faint);
  font-size: 0.875rem;
  margin: 0 0 0.35rem;
}

.entry-desc { display: block; margin: 0 0 0.4rem; color: var(--text-soft); }

.entry-links { margin: 0; font-size: 0.875rem; }
.entry-links a { margin-right: 0.85rem; }
.entry-links:empty { display: none; }

/* ---------- posts ---------- */
.post-meta {
  color: var(--text-faint);
  font-size: 0.9375rem;
  margin: -0.75rem 0 2rem;
}

.post-list .entry { display: flex; gap: 1.25rem; align-items: baseline; }
.post-list .entry-date {
  flex: 0 0 6.5rem;
  color: var(--text-faint);
  font-size: 0.875rem;
  font-variant-numeric: tabular-nums;
}
.post-list .entry-body { flex: 1 1 auto; min-width: 0; }

.back-link { margin-top: 3rem; font-size: 0.9375rem; }

/* ---------- footer ---------- */
.site-footer {
  width: 100%;
  max-width: var(--measure);
  margin: 0 auto;
  flex: 0 0 auto;
  padding: 1.75rem var(--pad) 3rem;
  border-top: 1px solid var(--rule);
  color: var(--text-faint);
  font-size: 0.875rem;
}
.site-footer .social { display: flex; flex-wrap: wrap; gap: 1.1rem; margin-bottom: 0.6rem; }
.site-footer p { margin: 0; }

/* ---------- small screens ---------- */
@media (max-width: 40rem) {
  body { font-size: 16px; }

  .site-header { padding-top: 1.75rem; }

  .intro {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.5rem;
  }
  .intro-photo { order: -1; width: 200px; }
  .intro .links { justify-content: center; }
  .intro-text { text-align: left; }
  .intro h1 { font-size: 2.25rem; text-align: center; }

  .post-list .entry { flex-direction: column; gap: 0.15rem; }
  .post-list .entry-date { flex: none; }
}