:root {
  --bg: #fbfaf7;
  --text: #1d1d1f;
  --muted: #5f6368;
  --rule: #e3e0d8;
  --accent: #1f5f8b;
  --accent-soft: #e8f0f6;
  --accent-2: #c0602b;
  --accent-3: #3f8a5c;
  --card: #ffffff;
  --max: 820px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15171a;
    --text: #e8e6e1;
    --muted: #9aa0a6;
    --rule: #2c3036;
    --accent: #7db7e0;
    --accent-soft: #1d2a35;
    --accent-2: #e8925f;
    --accent-3: #74c393;
    --card: #1b1e22;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 "Source Serif 4", Georgia, "Times New Roman", serif;
}

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 16px; }

/* Header */
header.site { position: relative; overflow: hidden; padding: 64px 0 40px; border-bottom: 1px solid var(--rule); }
header.site .hero { position: relative; display: flex; gap: 28px; align-items: flex-start; }
.portrait { flex: none; width: 132px; height: 132px; border-radius: 50%; object-fit: cover;
  border: 3px solid var(--bg); box-shadow: 0 0 0 1px var(--rule), 0 6px 20px rgba(0,0,0,0.12); }
header.site h1 { margin: 0; font-size: 2.4rem; line-height: 1.15; letter-spacing: -0.01em; }

.hero-art { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.5;
  -webkit-mask-image: linear-gradient(to right, transparent 58%, #000 88%);
  mask-image: linear-gradient(to right, transparent 58%, #000 88%); }
.hero-art .obstacles circle { fill: var(--rule); }
.hero-art .polygon polyline { fill: none; stroke: var(--muted); stroke-width: 1; stroke-dasharray: 4 5; opacity: 0.6; }
.hero-art .ctrl circle { fill: var(--bg); stroke: var(--muted); stroke-width: 1.5; }
.hero-art .curves path { fill: none; stroke: var(--accent); stroke-width: 2.5; opacity: 0.8; }
.hero-art .agents circle { fill: var(--accent); }
@media (prefers-reduced-motion: reduce) { .hero-art .agents { display: none; } }

.btn { display: inline-block; padding: 4px 14px; border: 1px solid var(--accent); border-radius: 999px; text-decoration: none; }
.btn:hover { background: var(--accent); color: var(--bg); }

/* Research cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { padding: 16px; border: 1px solid var(--rule); border-radius: 12px; background: var(--card); }
.card h3 { margin: 12px 0 4px; font-size: 1.02rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.93rem; line-height: 1.5; }
.illo { display: block; width: 100%; height: auto; border-radius: 8px; background: var(--accent-soft); }
.illo .poly { fill: none; stroke: var(--muted); stroke-width: 1; stroke-dasharray: 3 4; }
.illo .curve { fill: none; stroke: var(--accent); stroke-width: 3; stroke-linecap: round; }
.illo .curve.c2 { stroke: var(--accent-2); }
.illo .curve.c3 { stroke: var(--accent-3); }
.illo .pt { fill: var(--accent); }
.illo .pt.c2 { fill: var(--accent-2); }
.illo .pt.c3 { fill: var(--accent-3); }
.illo .pt.hollow { fill: var(--card); stroke: var(--accent); stroke-width: 2; }
.illo .obs { fill: var(--rule); }
.illo .noise circle { fill: var(--muted); opacity: 0.6; }
.illo .arrow { fill: none; stroke: var(--muted); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* Experience cards */
.xp { padding: 20px; border: 1px solid var(--rule); border-radius: 12px; background: var(--card); }
.xp h3 { margin: 2px 0 8px; font-size: 1.12rem; }
.xp p { margin: 0; }
.xp .xp-meta { color: var(--muted); font: 500 0.8rem/1.4 "Inter", system-ui, sans-serif;
  letter-spacing: 0.04em; text-transform: uppercase; }
.xp .xp-papers { margin-top: 12px; color: var(--muted); font: 500 0.85rem/1.5 "Inter", system-ui, sans-serif; }
.xp .xp-note { font-size: 0.75rem; }

/* Highlight a paper when jumped to from an experience card */
ol.pubs li { scroll-margin-top: 64px; border-radius: 6px; transition: background-color 0.6s; }
ol.pubs li:target { background: var(--accent-soft); box-shadow: 0 0 0 6px var(--accent-soft); }

.xp-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.xp-grid .xp p:not(.xp-meta) { font-size: 0.96rem; line-height: 1.55; }

/* Closing CV download button */
.cta { margin: 48px 0 16px; text-align: center; }
.btn.solid { padding: 8px 18px; background: var(--accent); color: var(--bg);
  font: 600 0.92rem/1.4 "Inter", system-ui, sans-serif; }
.btn.solid:hover { opacity: 0.9; }

@media (max-width: 720px) {
  .cards { grid-template-columns: 1fr; }
  .xp-grid { grid-template-columns: 1fr; }
}
header.site .role { margin: 6px 0 0; color: var(--muted); font-size: 1.05rem; }
header.site .intro { margin: 20px 0 0; }

.links { display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 20px 0 0; padding: 0; list-style: none;
  font: 500 0.95rem/1.4 "Inter", system-ui, sans-serif; }

nav.toc { position: sticky; top: 0; z-index: 1; background: var(--bg); border-bottom: 1px solid var(--rule); }
nav.toc ul { display: flex; gap: 20px; margin: 0; padding: 12px 0; list-style: none; overflow-x: auto; scrollbar-width: none;
  font: 500 0.9rem/1.4 "Inter", system-ui, sans-serif; }
nav.toc a { color: var(--muted); text-decoration: none; white-space: nowrap; }
nav.toc a:hover { color: var(--accent); }

/* Sections */
section { padding: 40px 0 8px; scroll-margin-top: 48px; }
section h2 { margin: 0 0 20px; font: 600 0.8rem/1.4 "Inter", system-ui, sans-serif;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }

.entry { margin: 0 0 28px; }
.entry-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0 16px; }
.entry h3 { margin: 0; font-size: 1.08rem; }
.entry .when, .entry .where { color: var(--muted); font-size: 0.95rem; }
.entry .title { font-style: italic; }
.entry ul { margin: 8px 0 0; padding-left: 20px; }
.entry li { margin: 4px 0; }

/* Publications */
ol.pubs { margin: 0; padding-left: 24px; }
ol.pubs li { margin: 0 0 16px; }
ol.pubs .pt { font-weight: 600; }
ol.pubs .venue { color: var(--muted); }
.tag { display: inline-block; margin-left: 4px; padding: 0 8px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent); font: 500 0.75rem/1.6 "Inter", system-ui, sans-serif; }

.note { margin: 0 0 0 24px; color: var(--muted); font-size: 0.9rem; }
.entry p { margin: 6px 0 0; }

@media (max-width: 560px) {
  header.site { padding-top: 40px; }
  header.site .hero { flex-direction: column; gap: 16px; }
  .portrait { width: 104px; height: 104px; }
  .hero-art { opacity: 0.25; -webkit-mask-image: none; mask-image: none; }
  header.site h1 { font-size: 2rem; }
}

footer { margin-top: 32px; padding: 24px 0 48px; border-top: 1px solid var(--rule);
  color: var(--muted); font: 0.85rem/1.4 "Inter", system-ui, sans-serif; }