/* Layout inspired by AcademicPages (masthead + sticky profile sidebar)
   and classic academic pages (dated updates table, labelled publications). */

:root {
  --bg: #ffffff;
  --fg: #3d4144;
  --heading: #1f2328;
  --muted: #6b7178;
  --line: #e5e7ea;
  --soft: #f4f5f7;
  --accent: #1f5f99;
  --accent-soft: #e8f0f8;
  --award: #8a5a00;

  /* publication type colours */
  --t-journal: #332288;
  --t-conference: #117733;
  --t-workshop: #1f7a8c;
  --t-preprint: #6b7178;
  --t-keynote: #882255;

  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181b;
    --fg: #d5d8dc;
    --heading: #f0f2f4;
    --muted: #9aa1a9;
    --line: #2c3036;
    --soft: #1e2125;
    --accent: #7ab4ea;
    --accent-soft: #1d2a38;
    --award: #e0b050;
    --t-journal: #8f84d8;
    --t-conference: #5cb87a;
    --t-workshop: #58b4c6;
    --t-preprint: #9aa1a9;
    --t-keynote: #d77aa6;
  }
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 var(--sans);
}

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

h1, h2, h3 { color: var(--heading); line-height: 1.25; font-weight: 650; }
h2 { font-size: 1.3rem; margin: 2.2rem 0 .8rem; padding-bottom: .35rem; border-bottom: 1px solid var(--line); }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 1rem; top: .5rem; background: var(--bg); padding: .3rem .6rem; z-index: 10; }

.muted { color: var(--muted); }
.small { font-size: .9rem; }

/* ---------- masthead ---------- */
.masthead {
  position: sticky;
  top: 0;
  z-index: 5;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
.masthead-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: .85rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .4rem 1.5rem;
}
.brand { font-weight: 700; font-size: 1.1rem; color: var(--heading); }
.brand:hover { text-decoration: none; }
nav { display: flex; flex-wrap: wrap; gap: .2rem 1.3rem; }
nav a { color: var(--muted); font-weight: 500; padding: .15rem 0; border-bottom: 2px solid transparent; }
nav a:hover { color: var(--heading); text-decoration: none; }
nav a[aria-current="page"] { color: var(--heading); border-bottom-color: var(--accent); }

/* ---------- two-column layout ---------- */
.layout {
  max-width: 1120px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 3rem;
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 3.5rem;
}
main { min-width: 0; max-width: 760px; }
.page-title { font-size: 2rem; margin: 0 0 1rem; }

/* ---------- sidebar ---------- */
.sidebar { position: sticky; top: 5.5rem; max-height: calc(100vh - 6rem); overflow: auto; align-self: start; }
.avatar { width: 160px; height: 160px; border-radius: 50%; object-fit: cover; display: block; margin-bottom: 1rem; }
.avatar-initials {
  display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent);
  font-size: 3rem; font-weight: 600; letter-spacing: .02em;
}
.side-name { font-size: 1.3rem; font-weight: 700; color: var(--heading); }
.side-short { margin: .25rem 0 .2rem; font-size: .92rem; line-height: 1.45; }
.side-loc { margin: 0 0 .8rem; font-size: .9rem; }
.side-links { list-style: none; padding: 0; margin: .8rem 0 0; font-size: .92rem; }
.side-links li { margin: .3rem 0; }
.side-links a { display: inline-flex; align-items: center; gap: .55rem; color: var(--fg); }
.side-links a:hover { color: var(--accent); }

.icon {
  width: 1.05em; height: 1.05em; flex: none; display: inline-block; vertical-align: -.15em;
  background: currentColor;
  -webkit-mask: var(--icon) center / contain no-repeat;
  mask: var(--icon) center / contain no-repeat;
}

/* ---------- home ---------- */
.bio p { margin: 0 0 1rem; text-align: justify; hyphens: auto; }

.news { width: 100%; border-collapse: collapse; }
.news th { text-align: left; vertical-align: top; white-space: nowrap; font-weight: 650; color: var(--heading); width: 7.5rem; padding: .45rem 1rem .45rem 0; }
.news td { padding: .45rem 0; vertical-align: top; }
.news tr + tr > * { border-top: 1px solid var(--soft); }

/* ---------- publications ---------- */
.filters { display: flex; flex-wrap: wrap; gap: .4rem; margin: 1rem 0 .8rem; align-items: center; }
.chip {
  font: inherit; font-size: .85rem; cursor: pointer;
  padding: .2rem .75rem; border-radius: 999px;
  border: 1px solid var(--line); background: var(--bg); color: var(--fg);
}
.chip:hover { border-color: var(--accent); }
.chip[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--bg); }
.chip[class*="t-"]::before {
  content: ""; display: inline-block; width: .55em; height: .55em; border-radius: 50%;
  margin-right: .45em; vertical-align: .05em; background: var(--dot);
}
.chip.t-journal { --dot: var(--t-journal); }
.chip.t-conference { --dot: var(--t-conference); }
.chip.t-workshop { --dot: var(--t-workshop); }
.chip.t-preprint { --dot: var(--t-preprint); }
.chip[aria-pressed="true"]::before { background: currentColor; }

.search {
  width: 100%; padding: .5rem .8rem; font: inherit; color: var(--fg);
  background: var(--bg); border: 1px solid var(--line); border-radius: 6px;
}
.search:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }

.year h2 { font-size: 1.1rem; margin-top: 1.8rem; }
.pubs { list-style: none; margin: 0; padding: 0; }
.pubs li { padding: .7rem 0; }
.pubs li + li { border-top: 1px solid var(--soft); }
.pub-title { font-weight: 600; color: var(--heading); }
.pub-authors { font-size: .95rem; }
.pub-venue { font-size: .95rem; color: var(--muted); }
.pub-award { font-size: .92rem; color: var(--award); font-weight: 600; margin-top: .1rem; }
.pub-links { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: .35rem; }

.badge {
  display: inline-block; font-size: .72rem; font-weight: 600; letter-spacing: .03em; text-transform: uppercase;
  padding: .1rem .5rem; border-radius: 4px; color: #fff; line-height: 1.6;
}
.badge.t-journal { background: var(--t-journal); }
.badge.t-conference { background: var(--t-conference); }
.badge.t-workshop { background: var(--t-workshop); }
.badge.t-preprint { background: var(--t-preprint); }
.badge.t-keynote { background: var(--t-keynote); margin-right: .4rem; vertical-align: .1em; }
.badge-link { background: var(--soft); color: var(--accent); border: 1px solid var(--line); }
.badge-link:hover { text-decoration: none; border-color: var(--accent); }
@media (prefers-color-scheme: dark) { .badge:not(.badge-link) { color: #111; } }

/* ---------- talks / teaching ---------- */
.talk-title { color: var(--heading); font-weight: 500; }
.plain { list-style: none; margin: 0; padding: 0; }
.plain > li { padding: .5rem 0; }
.plain > li + li { border-top: 1px solid var(--soft); }
.row { display: grid; grid-template-columns: 8.5rem minmax(0, 1fr); gap: 1rem; }
.when { color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }

.error { color: #b42318; }

/* ---------- footer ---------- */
.site-footer {
  max-width: 1120px; margin: 0 auto; padding: 1.25rem 1.25rem 2rem;
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem;
  border-top: 1px solid var(--line); color: var(--muted); font-size: .88rem;
}

/* ---------- small screens: sidebar becomes a compact profile header ---------- */
@media (max-width: 860px) {
  .masthead { position: static; }
  .layout { grid-template-columns: 1fr; gap: 1.5rem; padding-top: 1.5rem; }
  .sidebar {
    position: static;
    display: grid; grid-template-columns: auto 1fr; column-gap: 1rem; align-items: center;
    padding-bottom: 1.2rem; border-bottom: 1px solid var(--line);
  }
  .avatar { width: 80px; height: 80px; margin: 0; grid-row: span 3; }
  .avatar-initials { font-size: 1.6rem; }
  .side-short, .side-loc { margin: 0; }
  .side-links { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: .3rem 1.1rem; }
  .side-links li { margin: 0; }
  body[data-page="home"] .page-title { display: none; }
}
@media (max-width: 520px) {
  .row { grid-template-columns: 1fr; gap: 0; }
  .news th { display: block; width: auto; padding-bottom: 0; }
  .news td { display: block; padding-top: 0; }
  .news tr + tr > td { border-top: 0; }
}