/* ============================================================
   Jack, personal site
   Forked from the andyzeng.github.io academic template:
   two-column masthead, rule dividers, blue/orange link colors.
   Body type set in Times New Roman on white per Jack's request.
   ============================================================ */

:root {
  --bg:        #ffffff;
  --ink:       #111111;
  --ink-soft:  #333333;
  --ink-faint: #6a6a6a;
  --line:      #dddddd;
  --link:      #1772d0;   /* legible link blue */
  --link-hov:  #0d2749;   /* darker blue on hover */
  --max:       50rem;
  --serif: 'Times New Roman', Times, Georgia, serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.5;
  text-rendering: optimizeLegibility;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(2rem, 5vw, 3.5rem) 1.5rem 4.5rem;
}

/* ---------- Links ---------- */
a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hov); text-decoration: none; }

/* ---------- Masthead (two-column: bio left, photo right) ---------- */
.masthead {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  margin-bottom: 0.5rem;
}
.masthead .intro { flex: 1 1 auto; min-width: 0; }
.masthead h1 {
  font-weight: 700;
  font-size: clamp(2.2rem, 5vw, 2.9rem);
  line-height: 1.05;
  margin: 0 0 0.2rem;
}
.masthead .role {
  font-size: 1.1rem;
  color: var(--ink-soft);
  margin: 0 0 0.9rem;
}
.masthead .role a { color: var(--link); }
.masthead .role a:hover { color: var(--link-hov); }
.masthead .links { margin-top: 1.05rem; }
.masthead .photo {
  flex: 0 0 auto;
  width: 200px;
  height: 200px;
  overflow: hidden;
  background: #f2f2f2;
  border: 1px solid var(--line);
  border-radius: 4px;
}
.masthead .photo img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* ---------- Section headers with rule ---------- */
section { margin-top: 1.8rem; }
.section-label {
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 0.6rem;
}

.prose p { margin: 0 0 0.9rem; color: var(--ink); }
.prose p:last-child { margin-bottom: 0; }
.prose strong { font-weight: 700; }
.list-lead { margin: 0 0 0.4rem; color: var(--ink); }

/* ---------- Bulleted lists (portfolio + prose) ---------- */
.bullets { margin: 0.2rem 0 0; padding-left: 1.25rem; }
.bullets li { margin: 0 0 0.4rem; }
.bullets .b-name { font-weight: 400; }
.bullets .b-name a { color: var(--link); }
.bullets .b-name a:hover { color: var(--link-hov); }

/* ---------- Contact / links row ---------- */
.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 1.4rem;
  font-size: 1.05rem;
}
.links a { display: inline-flex; align-items: center; gap: 0.4rem; }
.links svg { width: 16px; height: 16px; flex: 0 0 auto; }

/* ---------- Company / venture lists ---------- */
.holdings { list-style: none; margin: 0.2rem 0 0; padding: 0; }
.holdings li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 0.4rem 0;
}
.holdings .h-name { font-weight: 700; }
.holdings .h-name a { color: var(--link); }
.holdings .h-name a:hover { color: var(--link-hov); }
.holdings .h-desc { color: var(--ink-soft); font-weight: 400; }
.holdings .h-role {
  flex: 0 0 auto;
  font-style: italic;
  font-size: 0.92rem;
  color: var(--ink-faint);
  white-space: nowrap;
}

/* ---------- Writings list ---------- */
.posts { list-style: none; margin: 0; padding: 0; }
.posts a.post-link {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1.25rem;
  padding: 0.55rem 0;
}
.posts .post-main { display: flex; flex-direction: column; gap: 0.12rem; }
.posts .post-title { font-size: 1.1rem; }
.posts .post-dek { font-size: 0.9rem; color: var(--ink-faint); line-height: 1.35; }
.posts .post-date {
  flex: 0 0 auto;
  font-size: 0.95rem;
  color: var(--ink-faint);
  white-space: nowrap;
}

/* ---------- Footer ---------- */
.site-foot {
  margin-top: 3rem;
  font-size: 0.92rem;
  color: var(--ink-faint);
}

/* ============================================================
   Post pages
   ============================================================ */
.post-nav { margin-bottom: 1.8rem; font-size: 1rem; }

.post-head { margin-bottom: 1.7rem; }
.post-head .post-meta {
  font-size: 0.95rem;
  color: var(--ink-faint);
  margin: 0 0 0.6rem;
}
.post-head h1 {
  font-weight: 700;
  font-size: clamp(1.95rem, 4.5vw, 2.5rem);
  line-height: 1.12;
  margin: 0 0 0.5rem;
}
.post-head .standfirst {
  font-size: 1.2rem;
  font-style: italic;
  line-height: 1.42;
  color: var(--ink-soft);
  margin: 0;
}

.article { font-size: 1.06rem; line-height: 1.6; }
.article h2 {
  font-weight: 700;
  font-size: 1.4rem;
  line-height: 1.25;
  margin: 2rem 0 0.6rem;
}
.article p { margin: 0 0 1.1rem; }
.article ul { margin: 0 0 1.1rem; padding-left: 1.3rem; }
.article li { margin: 0 0 0.4rem; }
.article a { text-decoration: underline; }

.article blockquote {
  margin: 1.2rem 0;
  padding-left: 1.5rem;
  color: var(--ink);
}
.article blockquote cite {
  display: block;
  margin-top: 0.3rem;
  font-style: normal;
  font-size: 0.92rem;
  color: var(--ink-faint);
}

/* ---------- Figures / visualizations ---------- */
.figure { margin: 1.9rem 0; }
.figure svg {
  width: 100%;
  height: auto;
  display: block;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 4px;
}
.figure figcaption {
  margin-top: 0.55rem;
  font-size: 0.9rem;
  font-style: italic;
  color: var(--ink-faint);
}

.source-note {
  margin-top: 2rem;
  font-size: 0.92rem;
  color: var(--ink-faint);
}

/* ---------- Small screens ---------- */
@media (max-width: 620px) {
  body { font-size: 18px; }
  .masthead { flex-direction: column-reverse; align-items: flex-start; gap: 1rem; }
  .masthead .photo { width: 150px; height: 150px; }
  .holdings li,
  .posts a.post-link { flex-direction: column; gap: 0.1rem; }
  .holdings .h-role { font-size: 0.88rem; }
}