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/* Two primary research areas, with a shared topic view. */
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@media(max-width:850px){.site-main{padding:34px}.about-top{grid-template-columns:minmax(0,1fr) 160px;gap:28px}.profile>img{width:160px}.profile-caption{font-size:.75rem}.about-copy h1{font-size:2.5rem}.post-grid{grid-template-columns:1fr}.latest-section .post-card{display:grid;grid-template-columns:180px 1fr}.latest-section .post-image{display:flex;align-items:center;border-bottom:0;border-right:1px solid var(--border)}.post-copy{padding:19px}.site-footer{font-size:.75rem}}
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@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.post-card{transition:none}.post-card:hover{transform:none}}
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.teaching-role{margin:32px 0 0;font-size:1.25rem}.teaching-role:first-child{margin-top:0}

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.publication-section+.publication-section{margin-top:36px}
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/* Keep the main links near the name; use a disclosure on compact screens. */
.mobile-navigation{display:none}
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  .nav-wrap .mobile-navigation>summary{font-size:1.75rem;line-height:1}
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  .mobile-menu{top:100%;right:20px;left:auto;width:min(20rem,calc(100% - 40px));min-width:0;max-height:calc(100vh - 96px);max-height:calc(100dvh - 96px);overflow-y:auto;overscroll-behavior:contain;padding:10px}
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  .mobile-group-label{display:block;padding:2px 12px 5px;color:var(--muted);font-size:.875rem;font-weight:600}
  .mobile-research a{padding-left:24px}
}

/* Educational articles keep diagrams and display equations readable on small screens. */
.article-body .math-display{margin:24px 0;overflow-x:auto;overflow-y:hidden;padding:4px 0}
.article-body .math-display mjx-container[display=true]{margin:.5em 0}
.article-diagram{margin:32px 0}
.diagram-scroll{overflow-x:auto;border:1px solid var(--border);border-radius:8px;background:#fff}
.diagram-scroll img{display:block;width:100%;min-width:600px;height:auto;max-width:none}
.article-diagram figcaption{font-size:.875rem;line-height:1.6;color:var(--muted);margin-top:12px}
.article-body .references{padding-left:1.7em;font-size:.9rem;line-height:1.7}
.references li{padding-left:.3em;margin-bottom:15px;scroll-margin-top:20px;overflow-wrap:anywhere}
.article-body table{display:block;overflow-x:auto;font-size:.94rem}
.article-body td{min-width:180px;vertical-align:top}
.article-body td:first-child{min-width:145px}
.article-body #prime-gaps-a-speedrun-in-public + p + p + table :is(th,td):nth-child(2){min-width:95px}
.blog-page .post-card.post-card-text{display:block}
.post-card-text .post-copy{padding:28px}
.latest-section .post-grid:has(>.post-card:nth-child(2):last-child){grid-template-columns:repeat(2,minmax(0,1fr))}
@media(max-width:850px){.latest-section .post-grid:has(>.post-card:nth-child(2):last-child){grid-template-columns:1fr}.latest-section .post-card-text{display:block}}
@media print{.diagram-scroll{overflow:visible}.diagram-scroll img{min-width:0;max-width:100%}.article-diagram{break-inside:avoid}}
.article-dates{margin-top:10px;gap:6px 18px}.article-update-note{font-size:.85rem;line-height:1.7;color:var(--muted);margin:16px 0 0;padding-left:12px;border-left:2px solid var(--accent)}

/* Four connected essays, with a clear next step at the end of each one. */
.post-grid.post-grid-four{grid-template-columns:repeat(2,minmax(0,1fr))}
.blog-page .post-grid-four .post-card:first-child{grid-column:auto;display:block}
.blog-page .post-grid-four .post-card:first-child .post-copy{padding:28px}
.blog-page .post-grid-four .post-card:first-child :is(h2,h3){font-family:inherit;font-size:1.02rem;line-height:1.48;font-weight:600}
.article-illustration img{display:block;width:100%;border-radius:8px}
.post-pagination{max-width:720px;margin:48px auto 0;padding-top:24px;border-top:1px solid var(--border);display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;font-size:.94rem;line-height:1.6}
.post-pagination span{display:block;color:var(--muted);font-size:.78rem;margin-bottom:6px}
.post-pagination .post-next{grid-column:2;text-align:right}
.research-flow{padding:0;list-style:none;counter-reset:research-step;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:28px 0}
.research-flow li{counter-increment:research-step;padding:16px;border:1px solid var(--border);border-radius:8px;font-size:.94rem;line-height:1.6}
.research-flow li::before{content:counter(research-step) ". ";color:var(--accent);font-weight:700}
@media(max-width:850px){.latest-section .post-grid-four{grid-template-columns:1fr}}
@media(max-width:580px){.blog-page .post-grid-four,.research-flow,.post-pagination{grid-template-columns:1fr}.post-pagination .post-next{grid-column:1;text-align:left}}

/* Topic labels and their sections share a distinct, theme-aware color. */
:root{
  --topic-blue:#1d4ed8;--topic-teal:#0f766e;--topic-violet:#7c3aed;--topic-amber:#a34b06;
  --topic-slate:#475569;--topic-cyan:#0e7490;--topic-magenta:#a21caf;--topic-rose:#be123c;
  --topic-green:#167144;--topic-indigo:#4338ca;--topic-olive:#596813;
  --topic-gold:#855d00;--topic-coral:#ab3a12;--topic-pink:#af1765;
  --topic-lime:#4f6b0a;--topic-plum:#733892;--topic-sky:#075985;
}
:root[data-mode=dark]{
  --topic-blue:#93c5fd;--topic-teal:#5eead4;--topic-violet:#c4b5fd;--topic-amber:#fdba74;
  --topic-slate:#cbd5e1;--topic-cyan:#67e8f9;--topic-magenta:#f0abfc;--topic-rose:#fda4af;
  --topic-green:#86efac;--topic-indigo:#a5b4fc;--topic-olive:#d3e78b;
  --topic-gold:#f5d76e;--topic-coral:#ff9264;--topic-pink:#f98bcc;
  --topic-lime:#b8ed66;--topic-plum:#d6a0f2;--topic-sky:#38bdf8;
}
[data-topic-color=blue]{--topic-color:var(--topic-blue)}
[data-topic-color=teal]{--topic-color:var(--topic-teal)}
[data-topic-color=violet]{--topic-color:var(--topic-violet)}
[data-topic-color=amber]{--topic-color:var(--topic-amber)}
[data-topic-color=slate]{--topic-color:var(--topic-slate)}
[data-topic-color=cyan]{--topic-color:var(--topic-cyan)}
[data-topic-color=magenta]{--topic-color:var(--topic-magenta)}
[data-topic-color=rose]{--topic-color:var(--topic-rose)}
[data-topic-color=green]{--topic-color:var(--topic-green)}
[data-topic-color=indigo]{--topic-color:var(--topic-indigo)}
[data-topic-color=olive]{--topic-color:var(--topic-olive)}
[data-topic-color=gold]{--topic-color:var(--topic-gold)}
[data-topic-color=coral]{--topic-color:var(--topic-coral)}
[data-topic-color=pink]{--topic-color:var(--topic-pink)}
[data-topic-color=lime]{--topic-color:var(--topic-lime)}
[data-topic-color=plum]{--topic-color:var(--topic-plum)}
[data-topic-color=sky]{--topic-color:var(--topic-sky)}
.research-area-panel>.topic-jump{gap:10px 12px}
.research-area-panel>.topic-jump>a{
  display:inline-flex;align-items:center;min-height:44px;max-width:100%;padding:8px 12px;
  border:1px solid color-mix(in srgb,var(--topic-color) 35%,var(--surface));border-left:3px solid var(--topic-color);
  border-radius:3px;background:color-mix(in srgb,var(--topic-color) 7%,var(--surface));
  color:var(--topic-color);font-size:.9rem;font-weight:500;line-height:1.5;overflow-wrap:anywhere;
}
.research-area-panel>.topic-jump>a:hover{border-color:var(--topic-color);text-decoration:underline}
.research-area-panel>.topic-jump>a:focus-visible{outline-color:var(--topic-color);outline-offset:3px}
.topic-section>h2{color:var(--topic-color);border-left:3px solid var(--topic-color);padding-left:14px}
.topic-section .paper-link,.topic-section .quantum-jump a,.topic-section .quantum-subgroup>h3{color:var(--topic-color)}
.topic-section .quantum-subgroup{border-left-color:color-mix(in srgb,var(--topic-color) 40%,var(--surface))}
.topic-alias{display:block;height:0;scroll-margin-top:24px}

/* Specific directions use outlined capsules; broad fields retain rectangular labels. */
.research-area-panel .quantum-jump{gap:10px 12px}
.quantum-jump>a{
  display:inline-flex;align-items:center;min-height:44px;max-width:100%;padding:8px 15px;
  border:1px solid var(--topic-color);border-radius:999px;background:var(--surface);
  color:var(--topic-color);font-size:.9rem;font-weight:500;line-height:1.5;overflow-wrap:anywhere;
}
.quantum-jump>a:hover{background:color-mix(in srgb,var(--topic-color) 7%,var(--surface));text-decoration:underline}
.quantum-jump>a:focus-visible{outline-color:var(--topic-color);outline-offset:3px}
.publication-meta{align-items:flex-start;gap:10px 16px}
.publication-details{display:flex;flex:1 1 24rem;flex-wrap:wrap;align-items:center;min-width:0;gap:7px 9px}
.publication-venue{max-width:100%;font-size:.875rem;line-height:1.5;overflow-wrap:anywhere}
.publication-meta>.paper-link{flex-shrink:0;padding-top:4px}
.paper-tag{
  display:inline-flex;align-items:center;max-width:100%;padding:3px 9px;
  border:1px solid color-mix(in srgb,var(--topic-color) 40%,var(--surface));border-radius:3px;
  background:color-mix(in srgb,var(--topic-color) 7%,var(--surface));color:var(--topic-color);
  font-size:.875rem;font-weight:500;line-height:1.45;overflow-wrap:anywhere;
}
.paper-tag[data-tag-kind=direction]{border-radius:999px;border-color:var(--topic-color);background:var(--surface)}