/* Homepage stylesheet: light, cool, quiet.
   Icons in _includes/icons are from Font Awesome Free (CC BY 4.0). */

:root {
  --bg: #f4f6f9;          /* cool mist page */
  --surface: #ffffff;
  --ink: #15202c;
  --muted: #566474;
  --rule: #dde3ea;
  --grid: #e3e8ef;
  --accent: #1f4fd1;      /* cobalt: links, path, highlights */
  --accent-soft: #e7edfb;
  --note: #b7791f;        /* amber: publication notes only */

  --sans: "Instrument Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;

  --step--1: 0.875rem;
  --step-0: 1.0625rem;
  --step-1: 1.25rem;
  --step-2: 1.5rem;
  --step-3: 2rem;
}

*, *::before, *::after { 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(--serif);
  font-size: var(--step-0);
  line-height: 1.65;
  font-optical-sizing: auto;
  text-rendering: optimizeLegibility;
}

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

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px; }

.skip-link {
  position: absolute; left: 1rem; top: -3rem;
  background: var(--ink); color: #fff; padding: 0.5rem 0.9rem;
  font-family: var(--sans); font-size: var(--step--1); border-radius: 4px; z-index: 10;
}
.skip-link:focus { top: 1rem; }

/* ---------- Page grid ---------- */

.page {
  display: grid;
  grid-template-columns: 19.5rem minmax(0, 43rem);
  gap: 4rem;
  justify-content: center;
  max-width: 72rem;
  margin: 0 auto;
  padding: 4rem 2rem 3rem;
}

/* ---------- Profile column ---------- */

.profile { font-family: var(--sans); }

.profile-photo {
  width: 12rem; height: auto;
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid var(--rule);
}

.profile-name {
  margin: 1.5rem 0 0.25rem;
  font-size: 1.75rem;
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.015em;
}

.profile-tagline {
  display: flex; gap: 0.5rem; align-items: center;
  white-space: nowrap;
  margin: 0 0 1.5rem;
  color: var(--accent);
  font-size: var(--step-0);
  font-weight: 600;
}

.affiliations { list-style: none; margin: 0 0 1.5rem; padding: 0; }
.affiliations li {
  padding: 0.1rem 0 0.1rem 0.85rem;
  border-left: 2px solid var(--accent);
  margin-bottom: 0.9rem;
  line-height: 1.35;
}
.affiliations a { color: var(--ink); font-weight: 600; text-decoration: none; }
.affiliations a:hover { color: var(--accent); }
.affiliations span { display: block; color: var(--muted); font-size: var(--step--1); margin-top: 0.15rem; }
.affiliations-label { margin: 0 0 0.6rem; color: var(--muted); font-size: var(--step--1); font-weight: 600; }
.affiliations.past li { border-left-color: var(--rule); }
.affiliations li.has-logo { display: flex; gap: 0.75rem; align-items: center; border-left: 0; padding-left: 0; }
.org-logo {
  width: 2.75rem; height: 2.75rem; flex: none;
  object-fit: contain; padding: 0.25rem;
  background: var(--surface); border: 1px solid var(--rule); border-radius: 8px;
}

.icon { width: 1.05em; height: 1.05em; flex: none; fill: currentColor; color: var(--muted); }

.profile-email {
  display: inline-flex; align-items: center; gap: 0.5rem;
  color: var(--ink); font-size: var(--step--1); text-decoration: none;
  margin-bottom: 1rem;
}
.profile-email:hover { color: var(--accent); }

.profile-links {
  list-style: none; margin: 0 0 2rem; padding: 0;
  display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; gap: 0.4rem;
}
.profile-links a {
  display: flex; align-items: center; justify-content: center; gap: 0.45rem;
  padding: 0.45rem 0.5rem;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  font-size: var(--step--1);
  font-weight: 500;
  text-decoration: none;
  transition: border-color 0.15s, color 0.15s;
}
.profile-links a:hover { border-color: var(--accent); color: var(--accent); }
.profile-links a:hover .icon, .profile-email:hover .icon { color: var(--accent); }

.toc {
  position: sticky; top: 2rem;
  display: flex; flex-direction: column; gap: 0.2rem;
  border-top: 1px solid var(--rule); padding-top: 1.25rem;
}
.toc a {
  color: var(--ink); text-decoration: none;
  font-size: 1.3rem; font-weight: 600; letter-spacing: -0.01em;
  padding: 0.3rem 0 0.3rem 0.85rem;
  border-left: 2px solid transparent;
}
.toc a:hover { color: var(--accent); border-left-color: var(--accent); }

/* Visitor map (MapMyVisitors widget) */
.visitors {
  margin: 0 0 2rem;
  padding: 0.75rem 0.75rem 0.6rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 12px;
}
.visitors figcaption {
  margin: 0 0 0.5rem;
  color: var(--muted);
  font-size: var(--step--1);
  font-weight: 600;
}
.visitors-map { border-radius: 8px; overflow: hidden; background: var(--accent-soft); min-height: 7rem; }
.visitors-map img, .visitors-map canvas, .visitors-map iframe { display: block; max-width: 100%; height: auto; }

/* ---------- Content column ---------- */

.content > section { margin-bottom: 3.5rem; }
.content > section { scroll-margin-top: 2rem; }

h2 {
  font-family: var(--sans);
  font-size: var(--step-2);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.25;
  margin: 0 0 1.25rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--rule);
}

h3 { font-family: var(--sans); font-weight: 600; line-height: 1.3; }

p { margin: 0 0 1.1rem; }

/* ---------- Off the clock ---------- */

.off-clock {
  margin-top: 2rem;
  padding: 1.5rem 1.75rem 0.4rem;
  background: var(--accent-soft);
  border-radius: 14px;
}
.off-clock h3 { font-size: var(--step-1); margin: 0 0 0.75rem; color: var(--accent); }
.off-clock p { font-size: 1rem; line-height: 1.6; }

/* ---------- Research interests ---------- */

.interests {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem 2rem;
}
.interests li { border-top: 2px solid var(--ink); padding-top: 1rem; }
.profile-tagline .icon { color: var(--accent); width: 1.15em; height: 1.15em; }

.pillar-badge {
  display: inline-grid; place-items: center;
  width: 3.5rem; height: 3.5rem;
  margin-bottom: 0.85rem;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
}
.pillar-icon { width: 2.4rem; height: 2.4rem; }
.pillar-icon .pillar-traj { stroke: var(--muted); stroke-width: 1.6; }
.pillar-icon .pillar-goal { fill: var(--note); }
.interests h3 { font-size: var(--step-1); margin: 0 0 0.5rem; text-wrap: balance; }
.interests p { margin: 0; color: var(--muted); font-size: 1rem; line-height: 1.5; }

/* ---------- News ---------- */

.news { list-style: none; margin: 0; padding: 0; }
.news li {
  display: grid; grid-template-columns: 6.25rem 1fr; gap: 1rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--rule);
}
.news li:last-child { border-bottom: 0; }
.news time {
  font-family: var(--sans);
  font-size: var(--step--1);
  font-weight: 600;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  padding-top: 0.15rem;
}
.news p { margin: 0; line-height: 1.55; }

/* ---------- Publications ---------- */

.pubs { list-style: none; margin: 0; padding: 0; }
.pub {
  display: grid; grid-template-columns: 12.5rem 1fr; gap: 1.5rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--rule);
}
.pub:first-child { padding-top: 0.25rem; }
.pub:last-child { border-bottom: 0; }

.pub-media img {
  width: 100%; aspect-ratio: 16 / 10; object-fit: contain; padding: 0.4rem;
  border-radius: 8px; border: 1px solid var(--rule); background: var(--surface);
}

.pub-venue {
  display: inline-block;
  margin: 0 0 0.5rem;
  padding: 0.1rem 0.55rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--sans);
  font-size: 0.8rem;
  font-weight: 600;
}

.pub-title { font-size: var(--step-0); margin: 0 0 0.35rem; }
.pub-title a { color: var(--ink); text-decoration: none; }
.pub-title a:hover { color: var(--accent); text-decoration: underline; }

.pub-authors { margin: 0 0 0.15rem; font-size: 1rem; line-height: 1.5; }
.pub-authors strong { font-weight: 600; }
.pub-where { margin: 0 0 0.5rem; font-size: 0.95rem; font-style: italic; color: var(--muted); }

.pub-links { margin: 0; display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; font-family: var(--sans); font-size: var(--step--1); font-weight: 500; }
.pub-note { color: var(--note); font-weight: 600; }

/* ---------- Service ---------- */

.sub { font-size: var(--step-0); margin: 0 0 0.5rem; }
.plain { margin: 0; padding-left: 1.1rem; }
.plain li { margin-bottom: 0.35rem; }

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--rule);
  padding-top: 1.25rem;
  font-family: var(--sans);
  font-size: var(--step--1);
  color: var(--muted);
}

/* ---------- Responsive ---------- */

@media (max-width: 960px) {
  .page { grid-template-columns: minmax(0, 1fr); gap: 2.5rem; max-width: 44rem; padding: 2.5rem 1.25rem 2rem; }
  .profile { display: grid; grid-template-columns: auto 1fr; column-gap: 1.25rem; align-items: center; }
  .profile-photo { width: 7rem; }
  .profile-name { align-self: center; margin: 0; font-size: 1.5rem; }
  .profile-tagline { grid-column: 1 / -1; margin: 1rem 0 0; }
  .affiliations, .affiliations-label, .profile-email, .profile-links, .visitors, .toc { grid-column: 1 / -1; }
  .visitors { margin: 1.5rem 0 0; max-width: 22rem; }
  .affiliations:first-of-type { margin-top: 1.5rem; }
  .profile-links { margin-bottom: 0; }
  .toc { position: static; flex-direction: row; flex-wrap: wrap; gap: 0.25rem 1.25rem; margin-top: 1.5rem; }
  .toc a { font-size: 1.1rem; padding: 0.2rem 0; border-left: 0; }
}

@media (max-width: 600px) {
  :root { --step-2: 1.35rem; }
  .interests { grid-template-columns: 1fr; }
  .pub { grid-template-columns: 1fr; gap: 0.9rem; }
  .pub-media { max-width: 22rem; }
  .news li { grid-template-columns: 1fr; gap: 0.15rem; }
  .off-clock { padding: 1.25rem 1.25rem 0.3rem; }
}

@media print {
  body { background: #fff; }
  .profile { position: static; }
  .toc, .skip-link, .site-footer script { display: none; }
}