/* Academic homepage: calm, typographic, with pastel pink / lavender / blue accents. */
:root {
  --bg: #fdfcff;
  --surface: #ffffff;
  --ink: #2b2740;
  --muted: #6b6585;
  --faint: #9a94b3;
  --line: #ece8f6;

  --pink: #fde6f0;
  --lavender: #ece6fc;
  --blue: #e0f2fd;
  --pink-strong: #ff8fb8;
  --lavender-strong: #b9a3f0;
  --blue-strong: #8fd0fa;

  --accent: #b03a72;        /* links, readable pink */
  --accent-2: #6a55b5;      /* headings detail, lavender ink */

  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17142a;
    --surface: #1f1b36;
    --ink: #eeeaff;
    --muted: #b4acd6;
    --faint: #8a82ad;
    --line: #2f2950;
    --pink: #3a2342;
    --lavender: #2c2552;
    --blue: #1d2d47;
    --accent: #ff9ec3;
    --accent-2: #c5b4ff;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 16px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
}

/* signature: a thin pastel band across the top, echoing the playground's three colour bands */
body::before {
  content: "";
  display: block;
  height: 5px;
  background: linear-gradient(90deg, var(--pink-strong), var(--lavender-strong), var(--blue-strong));
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 2px; border-radius: 4px; }

h1, h2, h3 { font-family: var(--serif); font-weight: 500; margin: 0; }
p { margin: 0 0 1em; }

/* ---------- top nav ---------- */
.topnav {
  max-width: 1080px; margin: 0 auto; padding: 18px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.topnav .brand { font-family: var(--serif); font-size: 20px; color: var(--ink); }
.topnav ul { display: flex; flex-wrap: wrap; gap: 4px 20px; list-style: none; margin: 0; padding: 0; font-size: 14px; }
.topnav ul a { color: var(--muted); }
.topnav ul a:hover { color: var(--accent); text-decoration: none; }
.topnav .play-link {
  color: var(--accent); background: var(--pink); padding: 4px 12px; border-radius: 999px; font-weight: 500;
}
.topnav .play-link:hover { background: var(--lavender); }

/* ---------- layout ---------- */
.layout {
  max-width: 1080px; margin: 0 auto; padding: 24px 24px 80px;
  display: grid; grid-template-columns: 290px 1fr; gap: 64px; align-items: start;
}

/* ---------- profile sidebar ---------- */
.profile { position: sticky; top: 24px; }
.avatar {
  width: 148px; height: 148px; border-radius: 50%;
  display: grid; place-items: center; overflow: hidden;
  background: linear-gradient(135deg, var(--pink), var(--lavender) 50%, var(--blue));
  font: 500 44px/1 var(--serif); color: var(--accent-2);
  box-shadow: 0 0 0 6px var(--bg), 0 0 0 7px var(--line);
  margin-bottom: 24px;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.profile h1 { font-size: 34px; line-height: 1.15; letter-spacing: -0.01em; }
.profile .role { color: var(--muted); margin: 8px 0 4px; font-size: 15px; line-height: 1.5; }
.profile .role a { color: inherit; border-bottom: 1px solid var(--line); }
.profile .role a:hover { color: var(--accent); text-decoration: none; }

.links { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 2px; }
.links a {
  display: flex; align-items: center; gap: 12px; padding: 7px 10px; margin-inline: -10px;
  border-radius: 10px; color: var(--ink); font-size: 14.5px;
}
.links a:hover { background: var(--lavender); text-decoration: none; }
.links svg { width: 18px; height: 18px; flex: none; color: var(--accent-2); }
.links .placeholder { color: var(--faint); }

.cv-btn {
  display: inline-flex; align-items: center; gap: 8px; margin-top: 20px;
  padding: 10px 18px; border-radius: 999px; font-weight: 500; font-size: 14.5px;
  background: var(--ink); color: var(--bg);
}
.cv-btn:hover { background: var(--accent); color: #fff; text-decoration: none; }
.cv-btn svg { width: 16px; height: 16px; }

/* tooltip: add data-tip="..." to any element */
[data-tip] { position: relative; }
[data-tip]::after {
  content: attr(data-tip); position: absolute; left: 50%; bottom: calc(100% + 8px); transform: translate(-50%, 4px);
  padding: 5px 10px; border-radius: 8px; white-space: nowrap; font-size: 13px; font-weight: 500;
  background: var(--ink); color: var(--bg); box-shadow: 0 4px 14px rgba(0,0,0,.15);
  opacity: 0; pointer-events: none; transition: opacity .15s, transform .15s;
}
[data-tip]:hover::after, [data-tip]:focus-visible::after { opacity: 1; transform: translate(-50%, 0); }

/* ---------- main content ---------- */
main section { padding: 8px 0 40px; scroll-margin-top: 24px; }
main section + section { border-top: 1px solid var(--line); padding-top: 40px; }
main h2 {
  font-size: 26px; margin-bottom: 20px;
  display: flex; align-items: center; gap: 12px;
}
main h2::before {
  content: ""; width: 10px; height: 10px; border-radius: 3px; flex: none;
  background: var(--dot, var(--lavender-strong));
}
#news h2 { --dot: var(--pink-strong); }
#publications h2 { --dot: var(--blue-strong); }
#docs h2 { --dot: var(--pink-strong); }
#education h2 { --dot: var(--pink-strong); }
#more h2 { --dot: var(--blue-strong); }

.lead { font-size: 18px; line-height: 1.7; }
.lead strong { font-weight: 600; }

.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 0; padding: 0; list-style: none; }
.tags li { padding: 4px 12px; border-radius: 999px; font-size: 13.5px; color: var(--ink); }
.tags li:nth-child(3n+1) { background: var(--pink); }
.tags li:nth-child(3n+2) { background: var(--lavender); }
.tags li:nth-child(3n) { background: var(--blue); }

/* news */
.news { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.news li { display: grid; grid-template-columns: 92px 1fr; gap: 16px; font-size: 15px; }
.news time { color: var(--faint); font-variant-numeric: tabular-nums; font-size: 14px; padding-top: 1px; }

/* publications */
.pubs { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.pub {
  padding: 18px 20px; border-radius: var(--radius); background: var(--surface);
  border: 1px solid var(--line); transition: border-color .2s, transform .2s;
}
.pub:hover { border-color: var(--lavender-strong); transform: translateY(-1px); }
.pub .title { font-family: var(--serif); font-size: 19px; line-height: 1.35; color: var(--ink); }
.pub .authors { color: var(--muted); font-size: 14.5px; margin-top: 4px; }
.pub .authors b { color: var(--ink); font-weight: 600; }
.pub .meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; font-size: 13px; }
.pub .meta span, .pub .meta a { padding: 2px 10px; border-radius: 999px; }
.pub .meta span { background: var(--lavender); color: var(--accent-2); }
.pub .meta a { background: var(--blue); }
.docs { margin-top: 16px; }
.pub .meta a.primary { background: var(--pink-strong); color: #2b2740; font-weight: 600; }
.note { color: var(--faint); font-size: 14px; margin-top: 14px; }

/* timeline entries (experience / education) */
.entries { list-style: none; margin: 0; padding: 0; display: grid; gap: 26px; }
.entry { display: grid; grid-template-columns: 1fr auto; gap: 2px 16px; }
.entry h3 { font-size: 19px; line-height: 1.35; }
.entry .when { color: var(--faint); font-size: 14px; white-space: nowrap; font-variant-numeric: tabular-nums; padding-top: 3px; }
.entry .where { grid-column: 1 / -1; color: var(--muted); font-size: 14.5px; }
.entry ul { grid-column: 1 / -1; margin: 8px 0 0; padding-left: 18px; font-size: 15px; color: var(--ink); }
.entry ul li { margin-bottom: 4px; }
.entry ul li::marker { color: var(--lavender-strong); }

/* small columns: awards, skills, languages... */
.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 24px 32px; }
.cols h3 { font-family: var(--sans); font-size: 12px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--faint); margin-bottom: 8px; }
.cols ul { list-style: none; margin: 0; padding: 0; font-size: 15px; display: grid; gap: 4px; }
.cols .sub { color: var(--muted); font-size: 13.5px; }

/* playground teaser card */
.teaser {
  display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  margin-top: 8px; padding: 22px 24px; border-radius: var(--radius);
  background: linear-gradient(120deg, var(--pink), var(--lavender) 55%, var(--blue));
  color: var(--ink);
}
.teaser:hover { text-decoration: none; }
.teaser strong { font-family: var(--serif); font-weight: 500; font-size: 20px; display: block; }
.teaser span { color: var(--muted); font-size: 14.5px; }
.teaser .go { font-weight: 500; color: var(--accent); white-space: nowrap; }
.teaser:hover .go { transform: translateX(3px); }
.teaser .go { transition: transform .2s; }

footer {
  max-width: 1080px; margin: 0 auto; padding: 24px; color: var(--faint); font-size: 13px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; border-top: 1px solid var(--line);
}
footer a { color: var(--muted); }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; gap: 40px; padding-top: 8px; }
  .profile { position: static; }
  .links { grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); }
  .topnav ul li:not(:last-child) { display: none; }
}
@media (max-width: 480px) {
  .topnav, .layout, footer { padding-inline: 16px; }
  .avatar { width: 116px; height: 116px; font-size: 36px; }
  .links { grid-template-columns: 1fr; }
  .profile h1 { font-size: 30px; }
  .news li { grid-template-columns: 1fr; gap: 0; }
  .entry { grid-template-columns: 1fr; }
  .entry .when { padding-top: 0; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .pub, .teaser .go { transition: none; }
}