/* =========================================================
   Colours and font — change these to restyle the whole site.
   Layout: one narrow reading column, a sticky name bar on top.
   ========================================================= */
:root {
  /* Palette taken from Van Gogh's "The Starry Night" (1889).
     One deliberate night look, the same in light and dark mode. */
  --bg:      #16224a;   /* page background: the deep night sky */
  --box:     #1c2b5a;   /* publications box */
  --ink:     #f3ebcf;   /* main text: the cream of the star halos */
  --muted:   #a9b7d8;   /* secondary text: pale swirl blue */
  --rule:    #2f4378;   /* thin lines */

  /* highlight colours from the painting */
  --yellow:  #f2cf45;   /* the stars */
  --ochre:   #e3a43a;   /* the moon */
  --blue:    #7fa2db;   /* the big swirl */
  --sky:     #a6d0d8;   /* pale sky near the horizon */
  --green:   #93b38a;   /* the hills */
  --orange:  #d9824a;   /* the village windows and roofs */
  --deep:    #3c5ca6;   /* ultramarine, used for blocks and shadows */
  --on-fill: #16224a;   /* text placed on a coloured fill */

  --link:    var(--sky);
  --mark:    #6a5826;   /* highlighter behind link underlines */

  --font: "Archivo", "Helvetica Neue", Arial, sans-serif;

  --measure: 44rem;     /* width of the main column */
  color-scheme: dark;
}

/* topic colour classes, used by research topics and paper tags */
.c-yellow { --c: var(--yellow); }
.c-ochre  { --c: var(--ochre); }
.c-blue   { --c: var(--blue); }
.c-sky    { --c: var(--sky); }
.c-green  { --c: var(--green); }
.c-orange { --c: var(--orange); }
.c-ink    { --c: var(--muted); }

/* ========================= base ========================= */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 4.5rem; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 1.0625rem/1.65 var(--font);
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
  background: linear-gradient(var(--mark), var(--mark)) 0 100% / 100% .35em no-repeat;
  transition: background-size .15s;
}
a:hover { background-size: 100% 100%; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--yellow); outline-offset: 2px; }
p { margin: 0 0 .6em; }
h1, h2, h3 { font-family: var(--font); line-height: 1.1; margin: 0; text-wrap: balance; }

main {
  max-width: var(--measure); margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
  padding-block: 0 4rem;
}
section { padding-top: 3.75rem; }

h2 {
  font-size: 1.05rem; font-weight: 800; font-stretch: 112%;
  text-transform: uppercase; letter-spacing: .06em;
  margin-bottom: 1.3rem; padding-bottom: .55rem;
  border-bottom: 3px solid var(--ink);
}

/* ========================= top bar ========================= */
body::before {
  content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px);
  z-index: 10; background: var(--bg);
}
.topbar {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 10;
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
}
.topbar-inner {
  max-width: var(--measure); margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
  padding-block: .7rem;
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
}
.topbar-name { font: 800 1rem var(--font); font-stretch: 112%; background: none; white-space: nowrap; }
.topbar nav { display: flex; gap: 1rem; overflow-x: auto; font: 500 .9rem var(--font); min-width: 0; }
.topbar nav a { color: var(--muted); background: none; white-space: nowrap; }
.topbar nav a:hover { color: var(--ink); }
@media (max-width: 640px) { .topbar-name { display: none; } }

/* ========================= intro ========================= */
.intro {
  display: grid; grid-template-columns: 14rem minmax(0, 1fr); gap: 2.25rem; align-items: start;
  padding-top: 3.5rem;
}
.portrait { margin: 0; position: relative; isolation: isolate; max-width: 100%; }
.portrait::before {           /* the offset colour disc behind the photo */
  content: ""; position: absolute; inset: .6rem -.6rem -.6rem .6rem;
  background: var(--deep); border-radius: 50%; z-index: -1;
}
.portrait img { display: block; width: 100%; max-width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 50%; }
.intro h1 { font-size: clamp(2.2rem, 5.6vw, 2.9rem); font-weight: 800; font-stretch: 115%; letter-spacing: -.015em; line-height: 1; }
.role { font: 500 1rem/1.45 var(--font); color: var(--muted); margin: .7rem 0 1.1rem; }
.bio p { margin-bottom: 1rem; }
.profile-links { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: .5rem; }
.profile-links a {
  display: inline-block; font: 600 .85rem var(--font);
  border: 1.5px solid var(--ink); padding: .25rem .7rem; background: none;
}
.profile-links a:hover { background: var(--ink); color: var(--bg); }
@media (max-width: 640px) {
  .intro { grid-template-columns: minmax(0, 1fr); gap: 2rem; }
  .portrait { width: 12rem; }
}

/* ========================= research ========================= */
.interests {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 1.3rem 1.4rem;
}
.interest { grid-column: 1 / -1; display: grid; grid-template-columns: subgrid; align-items: start; }
.interest h3 {
  white-space: nowrap;
  justify-self: start;
  font-size: .95rem; font-weight: 700; font-stretch: 105%;
  background: var(--c); color: var(--on-fill);
  padding: .3rem .6rem; transform: rotate(-1.5deg);
}
.interest:nth-child(even) h3 { transform: rotate(1.2deg); }
.interest p { margin: 0; }
@media (max-width: 560px) {
  .interests { grid-template-columns: minmax(0, 1fr); }
  .interest { gap: .5rem; }
}

/* ========================= publications ========================= */
.pub-controls { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem 1rem; margin-bottom: .8rem; }
.seg { display: inline-flex; border: 1.5px solid var(--ink); }
.seg button {
  font: 600 .85rem var(--font); color: var(--ink); background: transparent;
  border: 0; padding: .35rem .8rem; cursor: pointer;
}
.seg button + button { border-left: 1.5px solid var(--ink); }
.seg button[aria-pressed="true"] { background: var(--ink); color: var(--bg); }
.pub-count { font: 500 .85rem var(--font); color: var(--muted); margin-left: auto; font-variant-numeric: tabular-nums; }

.scroll-box {
  overflow-y: auto;
  background: var(--box);
  border: 1.5px solid var(--ink);
  padding: 0 1.1rem;
  scrollbar-color: var(--muted) transparent;
}
.pub-box { max-height: 31rem; }
#talks .scroll-box { max-height: 26rem; }
.pubs { list-style: none; margin: 0; padding: 0; }
.pub { display: grid; grid-template-columns: 3rem minmax(0, 1fr); gap: .8rem; padding: 1rem 0; border-bottom: 1px solid var(--rule); }
.pub:last-child { border-bottom: 0; }
.pub-year { font: 700 .85rem var(--font); color: var(--muted); padding-top: .25rem; font-variant-numeric: tabular-nums; }
.pub-title { font-size: 1.02rem; line-height: 1.4; font-weight: 600; margin-bottom: .2rem; }
.pub-title a { background-size: 100% 0; }
.pub-title a:hover { background-size: 100% .35em; }
.pub-authors { font-size: .95rem; color: var(--muted); margin-bottom: .35rem; }
.pub-authors strong { color: var(--ink); font-weight: 600; }
.pub-meta { font: 400 .82rem var(--font); display: flex; flex-wrap: wrap; align-items: center; gap: .35rem .45rem; margin: 0; }
.pub-meta .journal { font-weight: 600; margin-right: .2rem; }
.chip { font-weight: 600; font-size: .75rem; padding: .05rem .45rem; background: var(--c); color: var(--on-fill); }
.tag-link { font-weight: 700; font-size: .78rem; letter-spacing: .03em; color: var(--link); background: none; }
.tag-link:hover { text-decoration: underline; }

.group-head {          /* topic headings inside the box (by-topic view) */
  list-style: none; position: sticky; top: 0; z-index: 1;
  background: var(--box);
  padding: .8rem 0 .5rem; border-bottom: 1.5px solid var(--ink);
}
.group-head span { font: 700 .85rem var(--font); background: var(--c); color: var(--on-fill); padding: .15rem .5rem; }

/* ========================= CV ========================= */
.cv-row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem; }
.button {
  display: inline-flex; align-items: baseline; gap: .6rem;
  background: var(--yellow); color: var(--on-fill);
  font: 700 1rem var(--font); padding: .75rem 1.3rem;
  box-shadow: 5px 5px 0 var(--deep);
  transition: transform .1s, box-shadow .1s;
}
.button:hover { background: var(--yellow); color: var(--on-fill); transform: translate(-2px, -2px); box-shadow: 7px 7px 0 var(--deep); }
.button .small { font-weight: 400; font-size: .8rem; opacity: .9; }

/* ========================= talks & outreach ========================= */
.entries { list-style: none; margin: 0; padding: 0; }
.entries li { display: grid; grid-template-columns: 5.5rem minmax(0, 1fr); gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--rule); }
.entries li:last-child { border-bottom: 0; }
.entries time { font: 700 .85rem var(--font); color: var(--muted); padding-top: .25rem; font-variant-numeric: tabular-nums; }
.entry-title { font-size: 1.04rem; line-height: 1.4; font-weight: 600; margin-bottom: .1rem; }
.entry-meta { color: var(--muted); font-size: .98rem; margin-bottom: .3rem; }
.entry-text p { font-size: 1rem; }
.entry-links { display: flex; flex-wrap: wrap; gap: .5rem; margin: .5rem 0 0; }
.entry-links a {
  font: 600 .8rem var(--font); background: none;
  border: 1.5px solid var(--ink); padding: .2rem .65rem;
}
.entry-links a:hover { background: var(--ink); color: var(--bg); }
.entry-links a.slides  { border-color: var(--yellow); color: var(--yellow); }
.entry-links a.video   { border-color: var(--sky); color: var(--sky); }
.entry-links a.slides:hover { background: var(--yellow); color: var(--on-fill); }
.entry-links a.video:hover  { background: var(--sky); color: var(--on-fill); }
@media (max-width: 520px) { .entries li { grid-template-columns: minmax(0, 1fr); gap: .2rem; } }

/* talks: one compact row each, buttons on the right */
.entries.compact li { grid-template-columns: 3rem minmax(0, 1fr) auto; gap: .9rem; padding: .8rem 0; align-items: start; }
.entries.compact .entry-meta { margin-bottom: 0; font-size: .93rem; }
.entries.compact .entry-links { margin: 0; flex-wrap: nowrap; padding-top: .1rem; }
@media (max-width: 520px) {
  .entries.compact li { grid-template-columns: 2.8rem minmax(0, 1fr); gap: .2rem .7rem; }
  .entries.compact .entry-links { grid-column: 2; margin-top: .4rem; }
}

/* ========================= contact & footer ========================= */
.contact-grid { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem 2rem; }
.email { font: 700 1.2rem var(--font); overflow-wrap: anywhere; }
address { font-style: normal; color: var(--muted); }
.footer { text-align: center; color: var(--muted); font: 400 .8rem var(--font); padding: 2rem 16px 3rem; }
.nowrap { white-space: nowrap; }
.n-authors { white-space: nowrap; }
.pub-meta .status { font-weight: 600; color: var(--yellow); }

/* the thesis note in the bio */
.bio .callout {
  border-left: 3px solid var(--yellow);
  padding: .5rem 0 .5rem .9rem;
  background: color-mix(in srgb, var(--yellow) 8%, transparent);
}
.bio .callout strong { color: var(--yellow); }

/* hidden things stay hidden (e.g. papers filtered out in the publications box) */
[hidden] { display: none !important; }