/* ---------- Tokens ---------- */
:root {
  --bg: #ffffff;
  --bg-soft: #f1f5fb;          /* very light blue tint */
  --ink: #0f1e3d;              /* deep navy text */
  --ink-soft: #334a6e;          /* desaturated navy */
  --muted: #64748b;             /* slate-blue gray */
  --line: #dbe6f3;              /* soft blue line */
  --accent: #1d4ed8;            /* royal blue — academic feel */
  --accent-soft: #dbeafe;       /* light blue tint */
  --max: 880px;
  --radius: 6px;
  --shadow: 0 1px 2px rgba(15, 30, 61, .06), 0 4px 18px rgba(15, 30, 61, .06);
  --serif: "Source Serif 4", "Source Serif Pro", Georgia, "Times New Roman", serif;
  --sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a162a;               /* deep navy background */
    --bg-soft: #122038;           /* slightly lighter navy */
    --ink: #e8eefc;               /* near-white with blue tint */
    --ink-soft: #b4c2dd;          /* muted blue-gray */
    --muted: #7d8db0;             /* slate */
    --line: #1d2c4a;              /* dark blue line */
    --accent: #7ab2ff;            /* bright sky blue */
    --accent-soft: #1a2e57;       /* deep blue tint */
    --shadow: 0 1px 2px rgba(0,0,0,.5), 0 4px 18px rgba(0,0,0,.4);
  }
}

/* ---------- Base ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .15s ease, color .15s ease;
}
a:hover { border-bottom-color: var(--accent); }

h1, h2, h3, h4 {
  font-family: var(--serif);
  color: var(--ink);
  letter-spacing: -0.01em;
  line-height: 1.25;
  margin: 0 0 .5em 0;
  font-weight: 600;
}
h1 { font-size: 2.0rem; }
h2 { font-size: 1.4rem; margin-top: 2.2em; padding-bottom: .35em; border-bottom: 1px solid var(--line); }
h3 { font-size: 1.1rem; margin-top: 1.4em; }

/* Subsection label — styled like a lead paragraph (sans, soft ink, regular weight) */
.subhead {
  font-family: var(--sans);
  font-size: 1.08rem;
  font-weight: 400;
  color: var(--ink-soft);
  letter-spacing: 0;
  margin-top: 1.6em;
  margin-bottom: .8em;
}

/* Sub-section separator: rule above + extra space, used together with .subhead */
.subsection {
  margin-top: 2.6em;
  padding-top: 1.4em;
  border-top: 1px solid var(--line);
}

p, ul, ol { margin: 0 0 1em 0; }
ul, ol { padding-left: 1.2em; }
li { margin-bottom: .55em; }

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

code, .mono { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: .92em; }

/* ---------- Layout ---------- */
.page {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2.6rem 1.4rem 4rem 1.4rem;
}

/* ---------- Top nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: saturate(180%) blur(8px);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: .9rem 1.4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.nav-brand {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--ink);
  border: none;
}
.nav-brand:hover { color: var(--accent); border: none; }
.nav-links {
  display: flex;
  gap: 1.4rem;
  font-size: .96rem;
}
.nav-links a {
  color: var(--ink-soft);
  border: none;
  padding-bottom: 2px;
  border-bottom: 1.5px solid transparent;
}
.nav-links a:hover { color: var(--accent); border-bottom-color: var(--accent); }
.nav-links a.active { color: var(--ink); border-bottom-color: var(--accent); }

/* ---------- Hero / header (home) ---------- */
.hero {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 2.2rem;
  align-items: start;
  margin-top: .5rem;
  margin-bottom: 2.6rem;
}
.hero-photo {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.hero-photo.placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
  padding: 1rem;
  font-family: var(--serif);
  font-style: italic;
}
.hero-text h1 {
  margin-top: -4px;
  margin-bottom: .25em;
}
.hero-role {
  color: var(--ink-soft);
  font-size: 1.05rem;
  margin: 0 0 .4em 0;
}
.hero-affil {
  color: var(--muted);
  font-size: .98rem;
  margin: 0 0 1.2em 0;
}
.hero-affil a { color: var(--ink-soft); }

.icons {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  margin-top: .8em;
}
.icons a {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  padding: .35em .75em;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: .9rem;
  color: var(--ink-soft);
  background: var(--bg-soft);
}
.icons a:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-soft);
}
.icons svg { width: 16px; height: 16px; }

/* ---------- Content blocks ---------- */
.lead { font-size: 1.08rem; color: var(--ink-soft); }

.research-line {
  margin-top: 1.2em;
  color: var(--ink-soft);
}
.research-line strong {
  color: var(--ink);
  font-weight: 600;
}
.research-line.upcoming {
  margin-top: .4em;
}
.upcoming-pin {
  display: inline-block;
  color: var(--accent);
  font-size: .65em;
  vertical-align: middle;
  margin-right: .35em;
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: .35; }
}

/* Publication / paper entry */
.paper {
  margin-bottom: 1.6em;
  padding-left: 0;
}
.paper-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.06rem;
  color: var(--ink);
  line-height: 1.35;
}
.paper-meta {
  color: var(--muted);
  font-size: .92rem;
  margin-top: .15em;
}
.paper-status {
  display: inline-block;
  font-style: italic;
  color: var(--ink-soft);
  margin-top: .15em;
}
.paper-links {
  margin-top: .25em;
  font-size: .88rem;
}
.paper-links a {
  text-transform: uppercase;
  letter-spacing: .04em;
  font-weight: 500;
  margin-right: .8em;
}

/* Awards list under a paper — discrete */
.paper-awards {
  margin-top: .55em;
  font-size: .82rem;
  color: var(--muted);
  line-height: 1.5;
}
.paper-awards-label {
  font-style: italic;
  margin-right: .25em;
}
.paper-awards ul {
  margin: .15em 0 0 0;
  padding-left: 1em;
  list-style: none;
}
.paper-awards li {
  position: relative;
  margin-bottom: .15em;
  padding-left: .8em;
}
.paper-awards li::before {
  content: "·";
  position: absolute;
  left: 0;
  color: var(--muted);
  font-size: 1em;
  top: -.05em;
}
.paper-awards li a {
  color: var(--ink-soft);
  border-bottom: 1px dotted var(--line);
  font-weight: 400;
}
.paper-awards li a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* Past Presentations — year on the left, list on the right */
.presentations {
  display: grid;
  grid-template-columns: 4em 1fr;
  gap: .8em 1.4em;
  margin: 1em 0 0 0;
}
.presentations dt {
  font-family: var(--serif);
  font-weight: 600;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.presentations dd {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.55;
}
@media (max-width: 640px) {
  .presentations {
    grid-template-columns: 1fr;
    gap: .25em 0;
  }
  .presentations dd { margin-bottom: .8em; }
}

/* Media coverage line — discrete, single line below awards */
.paper-media {
  margin-top: .55em;
  font-size: .82rem;
  color: var(--muted);
  line-height: 1.5;
}
.paper-media-label {
  font-style: italic;
  margin-right: .25em;
}
.paper-media a {
  color: var(--ink-soft);
  border-bottom: 1px dotted var(--line);
}
.paper-media a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* CV-style two-column entries */
.cv-entry {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  align-items: baseline;
  padding: .5em 0;
  border-bottom: 1px dashed transparent;
}
.cv-entry .when {
  color: var(--muted);
  font-size: .9rem;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.cv-entry .what strong { font-weight: 600; }
.cv-entry .what em { color: var(--ink-soft); }
.cv-entry .what .sub {
  display: block;
  color: var(--ink-soft);
  font-size: .94rem;
  margin-top: .1em;
}

/* References block */
.refs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.4rem 2rem;
  margin-top: 1em;
}
.ref strong { display: block; font-family: var(--serif); font-size: 1.02rem; }
.ref .ref-affil { color: var(--ink-soft); font-size: .92rem; }

/* ---------- Footer ---------- */
.footer {
  margin-top: 3rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .86rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: left;
  }
  .hero-photo {
    width: 140px;
    height: 140px;
  }
  .nav-links { gap: .9rem; font-size: .92rem; }
  .nav-inner { padding: .8rem 1.1rem; }
  .page { padding: 1.6rem 1.1rem 3rem 1.1rem; }
  h1 { font-size: 1.7rem; }
  .cv-entry {
    grid-template-columns: 1fr;
    gap: .15rem;
  }
  .cv-entry .when { font-size: .82rem; }
  .refs { grid-template-columns: 1fr; }
}

/* Print: clean CV-style print of the CV page */
@media print {
  .nav, .footer { display: none; }
  body { font-size: 11pt; color: #000; background: #fff; }
  a { color: #000; border-bottom: none; }
  .page { padding: 0; max-width: none; }
  h2 { border-color: #000; }
}