/* =========================================================
   Bar Weinstein — personal site
   Palette : ink #1b1b1d · paper #ffffff · panel #f7f7f5
             accent #355070 (slate-blue) · muted #6b7078 · hairline #e7e7e3
   Type    : Newsreader (display/serif) · Inter (body) · JetBrains Mono (labels)
   ========================================================= */

:root {
  --ink:      #1b1b1d;
  /* --paper:    #ffffff; */
  --paper:    #faf8f3;
  /* --panel:    #f7f7f5; */
  --panel:    #f1efe9;
  --accent:   #355070;
  --accent-2: #2a4159;
  --muted:    #6b7078;
  --hairline: #e7e7e3;

  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans:  "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono:  "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --maxw: 940px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-2); text-decoration: underline; text-underline-offset: 2px; }

/* ---------- shell ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- top bar / nav ---------- */
.topbar {
  border-bottom: 1px solid var(--hairline);
}
.topbar .wrap {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-top: 22px;
  padding-bottom: 22px;
  flex-wrap: wrap;
}
.brand {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: .2px;
  color: var(--ink);
}
.brand:hover { text-decoration: none; color: var(--ink); }
.nav {
  display: flex;
  gap: 22px;
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.nav a { color: var(--muted); }
.nav a:hover { color: var(--accent); text-decoration: none; }
.nav a.active { color: var(--ink); }
.nav a.active::after {
  content: ""; display: block; height: 2px; margin-top: 4px;
  background: var(--accent);
}

/* ---------- layout: sidebar + main ---------- */
.layout {
  display: grid;
  grid-template-columns: 232px 1fr;
  gap: 48px;
  padding-top: 48px;
  padding-bottom: 72px;
}

/* ---------- sidebar ---------- */
.side { align-self: start; position: sticky; top: 32px; }
.photo {
  width: 168px; height: 168px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--hairline);
  display: block;
}
.side h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.7rem;
  line-height: 1.15;
  margin: 20px 0 2px;
  letter-spacing: .2px;
}
.side .role {
  color: var(--muted);
  font-size: .95rem;
  margin: 0 0 18px;
}
.contacts { list-style: none; margin: 0; padding: 0; }
.contacts li { margin: 0; }
.contacts a {
  display: flex; align-items: center; gap: 10px;
  padding: 5px 0;
  font-family: var(--mono);
  font-size: .8rem;
  letter-spacing: .02em;
  color: var(--ink);
}
.contacts a:hover { color: var(--accent); text-decoration: none; }
.contacts svg { width: 15px; height: 15px; flex: none; stroke: var(--accent); }

/* ---------- main content ---------- */
.main { min-width: 0; }
.eyebrow {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 14px;
}
.main h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.55rem;
  margin: 0 0 18px;
  letter-spacing: .2px;
}
.main p { margin: 0 0 18px; max-width: 64ch; }
.main p:last-child { margin-bottom: 0; }

/* subtle network motif used as a divider / header accent */
.net { display: block; width: 100%; height: 56px; opacity: .5; margin: 8px 0 34px; }
.net line { stroke: var(--hairline); stroke-width: 1; }
.net circle { fill: var(--accent); }

/* ---------- research list ---------- */
.papers { list-style: none; margin: 0; padding: 0; }
.paper {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 26px 0;
  border-top: 1px solid var(--hairline);
}
.paper:first-child { border-top: 0; padding-top: 0; }
.paper-head { display: flex; gap: 18px; align-items: flex-start; }
.paper-body { flex: 1; min-width: 0; }
.paper .tag {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .05em;
  color: var(--muted);
  margin: 0 0 6px;
}
.paper h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.18rem;
  line-height: 1.3;
  margin: 0 0 8px;
}
.paper .authors { font-size: .92rem; color: var(--muted); margin: 0 0 10px; }
.paper .authors .me { color: var(--ink); font-weight: 600; }
.paper .desc { font-size: .96rem; margin: 0 0 12px; max-width: 60ch; }
.links {
  display: flex; flex-wrap: wrap; gap: 8px;
  font-family: var(--mono); font-size: .74rem; letter-spacing: .03em;
}
.links a {
  border: 1px solid var(--hairline);
  border-radius: 4px;
  padding: 3px 10px;
  color: var(--ink);
}
.links a:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.fig {
  width: 132px; flex: none;
}
.fig img {
  width: 132px; height: auto; border: 1px solid var(--hairline); border-radius: 4px;
  display: block;
}

/* ---------- footer ---------- */
.foot {
  border-top: 1px solid var(--hairline);
  padding: 22px 0 36px;
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--muted);
  letter-spacing: .02em;
}

/* ---------- responsive ---------- */
@media (max-width: 760px) {
  .layout { grid-template-columns: 1fr; gap: 28px; padding-top: 32px; }
  .side { position: static; text-align: left; }
  .photo { width: 120px; height: 120px; }
  .side h1 { font-size: 1.5rem; }
  .paper-head { flex-direction: column; }
  .fig, .fig img { width: 100%; max-width: 280px; }
  .net { display: none; }
}

@media (prefers-reduced-motion: no-preference) {
  .net circle { transition: r .3s ease; }
}