/* =========================================================
   leochlon.github.io — minimalist personal homepage
   Design system:
   - Serif headings (Crimson Pro) + sans body (Inter)
   - Warm paper background, ink text, single rust accent
   - Restrained: hairline rules, generous line-height,
     no boxes/cards/gradients
   - Bold = proof points (numbers, named collaborators)
   - Italic = paper titles, emphasis moments
   ========================================================= */

:root {
  --bg:        #fbfaf6;          /* warm paper */
  --ink:       #18171a;          /* near-black ink */
  --ink-soft:  #2c2a2d;
  --muted:     #6e6862;
  --line:      #e7e3da;
  --line-soft: #efece4;
  --accent:    #b73e1e;          /* rust — distinctive, not slop */
  --accent-soft:#e8c4b6;

  --serif:     "Crimson Pro", "Iowan Old Style", Georgia, serif;
  --sans:      "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --mono:      "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --pad-x:     clamp(20px, 5vw, 56px);
  --max:       720px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  font-feature-settings: "kern", "liga", "calt";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(40px, 7vw, 80px) var(--pad-x) 80px;
}

/* ---------- typography ---------- */

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: -0.005em;
  color: var(--ink);
}

h1 {
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  line-height: 1.05;
  margin: 0 0 18px;
  font-weight: 500;
}

h2 {
  font-size: 1.6rem;
  line-height: 1.2;
  margin: 0 0 22px;
  font-weight: 500;
}

p {
  margin: 0 0 14px;
}

a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--accent-soft);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: text-decoration-color 0.15s ease, color 0.15s ease;
}
a:hover {
  color: var(--accent);
  text-decoration-color: var(--accent);
}

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

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 48px 0;
}

.muted { color: var(--muted); }
.muted a { color: var(--muted); }
.muted a:hover { color: var(--accent); }
.small { font-size: 0.88rem; }

.dot {
  display: inline-block;
  margin: 0 6px;
  color: var(--muted);
}

/* ---------- HERO ---------- */

.hero {
  display: grid;
  grid-template-columns: 168px 1fr;
  gap: clamp(20px, 4vw, 36px);
  align-items: start;
  margin-bottom: 48px;
}

.hero-photo img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 50%;
  border: 1px solid var(--line);
}

.hero-text h1 {
  margin-top: -6px;
}

.lede {
  font-family: var(--serif);
  font-size: clamp(1.15rem, 2.4vw, 1.35rem);
  line-height: 1.5;
  color: var(--ink);
  margin-bottom: 14px;
}

.lede-secondary {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink-soft);
  margin-bottom: 18px;
}

.contact-row {
  font-family: var(--sans);
  font-size: 0.95rem;
  color: var(--muted);
  margin-top: 18px;
}
.contact-row a { color: var(--ink-soft); }

@media (max-width: 600px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 22px;
  }
  .hero-photo {
    width: 140px;
  }
}

/* ---------- NEWS ---------- */

.news {
  list-style: none;
  margin: 0;
  padding: 0;
}
.news li {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 16px;
  padding: 8px 0;
  align-items: baseline;
  border-bottom: 1px solid var(--line-soft);
}
.news li:last-child { border-bottom: 0; }
.news .when {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--muted);
  letter-spacing: 0.02em;
  padding-top: 2px;
}
.news .what {
  font-size: 1rem;
  line-height: 1.6;
}

@media (max-width: 480px) {
  .news li {
    grid-template-columns: 50px 1fr;
    gap: 10px;
  }
}

/* ---------- PUBLICATIONS ---------- */

.pubs {
  list-style: decimal;
  padding-left: 1.4em;
  margin: 0;
}
.pubs li {
  margin-bottom: 22px;
  padding-left: 4px;
}
.pubs li::marker {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.85em;
}
.pub-title {
  font-family: var(--serif);
  font-size: 1.12rem;
  line-height: 1.35;
  margin: 0 0 4px;
  color: var(--ink);
}
.pub-meta {
  font-size: 0.92rem;
  color: var(--muted);
  margin: 0 0 4px;
}
.pub-links {
  font-family: var(--mono);
  font-size: 0.82rem;
  margin: 0;
}
.pub-links a {
  color: var(--ink-soft);
}

/* ---------- OPEN SOURCE ---------- */

.oss {
  list-style: none;
  margin: 0;
  padding: 0;
}
.oss li {
  display: grid;
  grid-template-columns: minmax(120px, 160px) 80px 1fr;
  gap: 14px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 0.97rem;
  line-height: 1.55;
  align-items: baseline;
}
.oss li:last-child { border-bottom: 0; }
.oss-name {
  font-family: var(--mono);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink);
  text-decoration-color: var(--accent-soft);
}
.oss-stars {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
  white-space: nowrap;
}
.oss-desc {
  color: var(--ink-soft);
}

@media (max-width: 600px) {
  .oss li {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 12px 0;
  }
  .oss-stars { font-size: 0.8rem; }
}

/* ---------- WORK ---------- */

.work, .education {
  list-style: none;
  margin: 0;
  padding: 0;
}
.work li, .education li {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line-soft);
}
.work li:last-child, .education li:last-child { border-bottom: 0; }

.role-where, .edu-where {
  font-size: 1rem;
  color: var(--ink);
}
.role-when, .edu-when {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--muted);
  white-space: nowrap;
  text-align: right;
}
.role-what, .edu-what {
  grid-column: 1 / -1;
  font-size: 0.94rem;
  color: var(--ink-soft);
  line-height: 1.55;
}

/* ---------- TALKS / BARE LIST ---------- */

ul.bare {
  list-style: none;
  margin: 0;
  padding: 0;
}
ul.bare li {
  padding: 8px 0;
  font-size: 0.97rem;
  color: var(--ink-soft);
  line-height: 1.6;
  border-bottom: 1px solid var(--line-soft);
}
ul.bare li:last-child { border-bottom: 0; }

/* ---------- FOOTER ---------- */

footer {
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  font-size: 0.92rem;
  color: var(--muted);
}
footer p { margin: 0 0 4px; }

/* ---------- SELECTION + FOCUS ---------- */

::selection {
  background: var(--accent-soft);
  color: var(--ink);
}
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- DARK MODE (subtle, opt-in via prefers-color-scheme) ---------- */

@media (prefers-color-scheme: dark) {
  :root {
    --bg:        #15141a;
    --ink:       #ece8df;
    --ink-soft:  #d4cfc4;
    --muted:     #8b857a;
    --line:      #2a2830;
    --line-soft: #1f1d24;
    --accent:    #d4654a;
    --accent-soft:#5a3324;
  }
  .hero-photo img { border-color: var(--line); }
}