/* ==========================================================================
   Onkar Sadekar — site.css
   Hand-written, zero dependencies. Structure:
     1. Fonts
     2. Palettes  (4 palettes x light/dark  =  data-palette x data-theme)
     3. Reset & base
     4. Layout primitives
     5. Header / nav / theme switcher
     6. Hero + network canvas
     7. Components (cards, pubs, timeline, chips, prose)
     8. Footer
     9. Motion & print
   ========================================================================== */

/* 1. Fonts ---------------------------------------------------------------- */

@font-face {
  font-family: 'Space Grotesk';
  src: url('../fonts/SpaceGrotesk-var.woff2') format('woff2');
  font-weight: 300 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Inter';
  src: url('../fonts/Inter-var.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'JetBrains Mono';
  src: url('../fonts/JetBrainsMono-var.woff2') format('woff2');
  font-weight: 100 800;
  font-style: normal;
  font-display: swap;
}

/* 2. Palettes ------------------------------------------------------------- */
/* Semantic tokens. Every palette defines the same names, so nothing else in
   this file ever mentions a literal colour.
     --bg        page background
     --bg-soft   alternating band / inset background
     --surface   cards, raised things
     --ink       body text
     --ink-2     muted / metadata text  (>= 4.5:1 on --bg)
     --line      hairlines, borders
     --a1/2/3    the three accents; --a1 is the primary
     --a1-ink    text colour that sits on a solid --a1 fill
     --glow      translucent accent for washes  */

:root {
  --bg: #fdfbf7;
  --bg-soft: #f4efe4;
  --surface: #ffffff;
  --ink: #16181d;
  --ink-2: #5d6472;
  --line: #e4ddcd;
  --a1: #c04319;
  --a2: #0f6f68;
  --a3: #8a6410;
  --a4: #6d3f8a;
  --a1-ink: #ffffff;
  --glow: rgba(192, 67, 25, 0.09);
  --shadow: 0 1px 2px rgba(20, 18, 12, 0.05), 0 8px 24px -12px rgba(20, 18, 12, 0.16);
}

:root[data-theme='dark'] {
  --bg: #14120f;
  --bg-soft: #1c1a15;
  --surface: #211e18;
  --ink: #f3eee2;
  --ink-2: #a7a091;
  --line: #322e27;
  --a1: #ff8a50;
  --a2: #35d6c0;
  --a3: #edc25a;
  --a4: #cb9ce0;
  --a1-ink: #1c1109;
  --glow: rgba(255, 138, 80, 0.13);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 12px 32px -14px rgba(0, 0, 0, 0.7);
}

/* — coral / teal / mustard — */
:root[data-palette='coral'] {
  --bg: #fffbf2;
  --bg-soft: #fdf2e0;
  --surface: #ffffff;
  --ink: #1f2124;
  --ink-2: #5f636b;
  --line: #f0e2cd;
  --a1: #c93e2d;
  --a2: #0c7c7c;
  --a3: #8a6510;
  --a4: #6b4fa8;
  --a1-ink: #ffffff;
  --glow: rgba(201, 62, 45, 0.09);
}
:root[data-palette='coral'][data-theme='dark'] {
  --bg: #17130f;
  --bg-soft: #1f1a14;
  --surface: #241e18;
  --ink: #f6eee1;
  --ink-2: #aba396;
  --line: #362d24;
  --a1: #ff7b6b;
  --a2: #2fd4d4;
  --a3: #f0c93a;
  --a4: #bda6ea;
  --a1-ink: #24100c;
  --glow: rgba(255, 123, 107, 0.13);
}

/* — electric indigo / lime — */
:root[data-palette='indigo'] {
  --bg: #fafaff;
  --bg-soft: #eeeefb;
  --surface: #ffffff;
  --ink: #12121f;
  --ink-2: #585a72;
  --line: #dedef2;
  --a1: #4f46e5;
  --a2: #4b780f;
  --a3: #7c3aed;
  --a4: #a8560a;
  --a1-ink: #ffffff;
  --glow: rgba(79, 70, 229, 0.09);
}
:root[data-palette='indigo'][data-theme='dark'] {
  --bg: #0c0c16;
  --bg-soft: #12121f;
  --surface: #171728;
  --ink: #ececf8;
  --ink-2: #9c9db8;
  --line: #26263c;
  --a1: #939cf9;
  --a2: #a3e635;
  --a3: #c4b5fd;
  --a4: #fbbf24;
  --a1-ink: #0e0e1c;
  --glow: rgba(147, 156, 249, 0.14);
}

/* — botanical: moss / clay / sky — */
:root[data-palette='botanical'] {
  --bg: #faf7f0;
  --bg-soft: #efeade;
  --surface: #ffffff;
  --ink: #22251f;
  --ink-2: #5b6157;
  --line: #ded8c8;
  --a1: #3f6b3a;
  --a2: #a7512c;
  --a3: #3e6d9b;
  --a4: #7a4f6d;
  --a1-ink: #ffffff;
  --glow: rgba(63, 107, 58, 0.1);
}
:root[data-palette='botanical'][data-theme='dark'] {
  --bg: #12150f;
  --bg-soft: #191d14;
  --surface: #1e2218;
  --ink: #eef0e6;
  --ink-2: #a3a897;
  --line: #2d3226;
  --a1: #93c98a;
  --a2: #e6996d;
  --a3: #9cc0e2;
  --a4: #d9a6c6;
  --a1-ink: #131a11;
  --glow: rgba(147, 201, 138, 0.13);
}

/* 3. Reset & base --------------------------------------------------------- */

*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  font-feature-settings: 'kern', 'liga', 'cv11';
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.35s ease, color 0.35s ease;
}

h1, h2, h3, h4 {
  font-family: 'Space Grotesk', 'Inter', system-ui, sans-serif;
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.022em;
  margin: 0 0 0.5em;
  text-wrap: balance;
}

h1 { font-size: clamp(2.4rem, 6.5vw, 4rem); }
h2 { font-size: clamp(1.7rem, 3.6vw, 2.4rem); }
h3 { font-size: 1.24rem; letter-spacing: -0.015em; }
h4 { font-size: 1.02rem; letter-spacing: 0; }

p { margin: 0 0 1.15em; }
p:last-child { margin-bottom: 0; }

a {
  color: var(--a1);
  text-decoration-color: color-mix(in srgb, var(--a1) 35%, transparent);
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1.5px;
  transition: color 0.15s ease, text-decoration-color 0.15s ease;
}
a:hover { text-decoration-color: var(--a1); }

:focus-visible {
  outline: 2.5px solid var(--a1);
  outline-offset: 3px;
  border-radius: 3px;
}

img { max-width: 100%; height: auto; display: block; }
ul, ol { margin: 0 0 1.15em; padding-left: 1.25em; }
li { margin-bottom: 0.35em; }
li::marker { color: var(--a1); }
strong { font-weight: 600; }
hr { border: 0; border-top: 1px solid var(--line); margin: 3rem 0; }

.mono {
  font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.78em;
  letter-spacing: 0.02em;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--a1);
  color: var(--a1-ink);
  padding: 0.7rem 1.2rem;
  z-index: 200;
  font-weight: 600;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* 4. Layout --------------------------------------------------------------- */

.wrap {
  width: min(100% - 2.5rem, 68rem);
  margin-inline: auto;
}
.wrap--narrow { width: min(100% - 2.5rem, 46rem); }

.section { padding: clamp(3.5rem, 8vw, 6rem) 0; }
.section--soft {
  background: var(--bg-soft);
  border-block: 1px solid var(--line);
}

/* Section heading with a little network glyph rule beside it */
.section-head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 2.25rem;
  flex-wrap: wrap;
}
.section-head h2 { margin: 0; }
.section-head .rule {
  flex: 1 1 4rem;
  height: 1px;
  background: var(--line);
  position: relative;
  top: -0.35em;
  min-width: 2rem;
}
/* trailing "see all →" link */
.section-head > a {
  font-size: 0.88rem;
  font-weight: 500;
  white-space: nowrap;
  text-decoration: none;
}
.section-head > a:hover { text-decoration: underline; }
.section-head .rule::after {
  content: '';
  position: absolute;
  right: 0; top: 50%;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--a1);
  transform: translate(50%, -50%);
}

.eyebrow {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--a1);
  margin: 0 0 0.9rem;
}

.lede {
  font-size: clamp(1.1rem, 2.2vw, 1.32rem);
  line-height: 1.55;
  color: var(--ink);
}

/* 5. Header --------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.6) blur(14px);
  -webkit-backdrop-filter: saturate(1.6) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease;
}
.site-header.is-stuck { border-bottom-color: var(--line); }

.nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 0;
}

.brand {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-right: auto;
  white-space: nowrap;
}
.brand:hover { color: var(--a1); }
.brand svg { flex: none; overflow: visible; }
.brand .n-node { fill: var(--a1); }
.brand .n-edge { stroke: var(--ink-2); stroke-width: 1.4; }
.brand:hover .n-edge { stroke: var(--a1); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  display: block;
  padding: 0.45rem 0.7rem;
  border-radius: 7px;
  color: var(--ink-2);
  text-decoration: none;
  font-size: 0.925rem;
  font-weight: 500;
  transition: color 0.15s ease, background-color 0.15s ease;
}
.nav-links a:hover { color: var(--ink); background: var(--glow); }
.nav-links a[aria-current='page'] {
  color: var(--a1);
  background: var(--glow);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.4rem 0.55rem;
  color: var(--ink);
  cursor: pointer;
  line-height: 0;
}

/* — theme + palette switcher — */
.themebar {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  padding-left: 0.6rem;
  margin-left: 0.3rem;
  border-left: 1px solid var(--line);
}

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 2.05rem;
  height: 2.05rem;
  border: 1px solid transparent;
  border-radius: 8px;
  background: none;
  color: var(--ink-2);
  cursor: pointer;
  padding: 0;
  transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}
.icon-btn:hover { color: var(--ink); background: var(--glow); border-color: var(--line); }
.icon-btn svg { width: 17px; height: 17px; }

/* swatch button shows the live palette */
.swatch {
  position: relative;
  width: 2.05rem; height: 2.05rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  cursor: pointer;
  padding: 0;
  display: inline-grid;
  place-items: center;
  transition: border-color 0.15s ease, transform 0.12s ease;
}
.swatch:hover { border-color: var(--a1); }
.swatch:active { transform: scale(0.94); }
.swatch i {
  display: block;
  width: 15px; height: 15px;
  border-radius: 50%;
  background: conic-gradient(var(--a1) 0 33%, var(--a2) 0 66%, var(--a3) 0);
}

.palette-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
  padding: 0.4rem;
  min-width: 13.5rem;
  display: none;
  z-index: 120;
}
.palette-menu[data-open='true'] { display: block; }
.palette-menu h4 {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.63rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-2);
  margin: 0.35rem 0.55rem 0.45rem;
  font-weight: 500;
}
.palette-menu button {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  padding: 0.45rem 0.55rem;
  border: 0;
  border-radius: 8px;
  background: none;
  color: var(--ink);
  font: inherit;
  font-size: 0.87rem;
  text-align: left;
  cursor: pointer;
}
.palette-menu button:hover { background: var(--glow); }
.palette-menu button[aria-checked='true'] { color: var(--a1); font-weight: 600; }
.palette-menu button[aria-checked='true']::after {
  content: '✓';
  margin-left: auto;
  font-size: 0.8rem;
}
.palette-menu .dots {
  display: inline-flex;
  gap: 3px;
  flex: none;
}
.palette-menu .dots span {
  width: 9px; height: 9px;
  border-radius: 50%;
  border: 1px solid rgba(128, 128, 128, 0.25);
}
.nav-right { position: relative; display: flex; align-items: center; gap: 1rem; }

/* 6. Hero ----------------------------------------------------------------- */

.hero {
  position: relative;
  padding: clamp(2.5rem, 6vw, 4.5rem) 0 clamp(3rem, 7vw, 5rem);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.hero h1 { margin-bottom: 0.35em; }
.hero h1 .accent { color: var(--a1); }

.hero-role {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  color: var(--ink-2);
  margin-bottom: 1.4rem;
  line-height: 1.5;
}
.hero-role strong { color: var(--ink); font-weight: 600; }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.8rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.62rem 1.15rem;
  border-radius: 9px;
  font-size: 0.925rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--line);
  color: var(--ink);
  background: var(--surface);
  cursor: pointer;
  transition: transform 0.12s ease, border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease;
}
.btn:hover { border-color: var(--a1); color: var(--a1); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn--primary {
  background: var(--a1);
  border-color: var(--a1);
  color: var(--a1-ink);
}
.btn--primary:hover {
  color: var(--a1-ink);
  filter: brightness(1.08);
  border-color: var(--a1);
}
.btn svg { width: 15px; height: 15px; flex: none; }

/* portrait */
.hero-portrait {
  position: relative;
  justify-self: center;
  max-width: 20rem;
  width: 100%;
}
.hero-portrait img {
  width: 100%;
  border-radius: 14px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  position: relative;
  z-index: 2;
}
/* offset accent frame behind the photo */
.hero-portrait::before {
  content: '';
  position: absolute;
  inset: 0;
  border: 2px solid var(--a1);
  border-radius: 14px;
  transform: translate(0.85rem, 0.85rem);
  z-index: 1;
  opacity: 0.65;
}

/* Ambient hero network: page texture, not a figure. It sits behind the
   content at low contrast and is masked so it fades out before it reaches
   the text, and never competes with it. */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.5;
  -webkit-mask-image: radial-gradient(120% 90% at 50% 45%, #000 25%, transparent 78%);
  mask-image: radial-gradient(120% 90% at 50% 45%, #000 25%, transparent 78%);
}
.hero-bg canvas { display: block; width: 100%; height: 100%; }
:root[data-theme='dark'] .hero-bg { opacity: 0.6; }
.hero > .wrap { position: relative; z-index: 1; }
@media (prefers-reduced-motion: reduce) { .hero-bg { opacity: 0.35; } }

/* — the network canvas — */
.netfig {
  position: relative;
  margin-top: clamp(2.5rem, 6vw, 3.5rem);
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.netfig canvas {
  display: block;
  width: 100%;
  height: clamp(17rem, 42vw, 25rem);
  touch-action: pan-y;
  cursor: grab;
}
.netfig canvas:active { cursor: grabbing; }

.netfig-bar {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.7rem 1rem;
  border-top: 1px solid var(--line);
  background: var(--bg-soft);
  flex-wrap: wrap;
}
.netfig-caption {
  font-size: 0.83rem;
  color: var(--ink-2);
  margin: 0;
  flex: 1 1 14rem;
  min-width: 0;
}
.netfig-caption b {
  color: var(--ink);
  font-weight: 600;
  font-family: 'Space Grotesk', sans-serif;
}
.netfig-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  padding: 0.38rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
  color: var(--ink-2);
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.netfig-btn:hover { color: var(--a1); border-color: var(--a1); }
.netfig-btn svg { width: 13px; height: 13px; }

/* tooltip that follows nodes in the co-author / paper modes */
.netfig-tip {
  position: absolute;
  pointer-events: none;
  background: var(--ink);
  color: var(--bg);
  font-size: 0.78rem;
  line-height: 1.35;
  padding: 0.4rem 0.6rem;
  border-radius: 7px;
  max-width: 15rem;
  opacity: 0;
  transform: translate(-50%, -125%);
  transition: opacity 0.14s ease;
  z-index: 5;
  font-weight: 500;
}
.netfig-tip[data-show='true'] { opacity: 1; }
/* Default anchor sits above the node/edge. Near the top or a side edge of
   the canvas that would push the tip out of the (overflow: hidden) figure,
   so JS flips to this and clamps horizontally — see showTip() in network.js. */
.netfig-tip.tip-below { transform: translate(-50%, 22%); }
.netfig-tip .tip-sub {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.66rem;
  opacity: 0.72;
  font-weight: 400;
  margin-top: 0.15rem;
}

/* 7. Components ----------------------------------------------------------- */

/* — chips — */
.chips { display: flex; flex-wrap: wrap; gap: 0.4rem; list-style: none; padding: 0; margin: 0; }
.chip {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.02em;
  padding: 0.24rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--ink-2);
  background: var(--surface);
  white-space: nowrap;
}
.chip--a1 { color: var(--a1); border-color: color-mix(in srgb, var(--a1) 35%, var(--line)); background: var(--glow); }
.chip--a2 { color: var(--a2); border-color: color-mix(in srgb, var(--a2) 35%, var(--line)); }
.chip--a3 { color: var(--a3); border-color: color-mix(in srgb, var(--a3) 35%, var(--line)); }

/* — cards grid — */
.grid { display: grid; gap: 1.25rem; }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 26rem), 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 15.5rem), 1fr)); }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.5rem;
  position: relative;
  transition: transform 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease;
}
.card--link:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--a1) 45%, var(--line));
  box-shadow: var(--shadow);
}
.card h3 { margin-bottom: 0.5rem; }
.card h3 a { color: inherit; text-decoration: none; }
.card h3 a::after { content: ''; position: absolute; inset: 0; }
.card p { color: var(--ink-2); font-size: 0.94rem; margin-bottom: 0; }
.card p + p { margin-top: 0.85em; }
.card .chips { margin-top: 1rem; }

/* theme cards carry a rotating accent + an SVG motif */
.card--theme { padding-top: 1.25rem; }
.card--theme .motif {
  width: 100%;
  height: 7.5rem;
  margin-bottom: 1.1rem;
  border-radius: 9px;
  background: var(--bg-soft);
  overflow: hidden;
}
.card--theme .motif svg { width: 100%; height: 100%; display: block; }
.t1 { --tone: var(--a1); }
.t2 { --tone: var(--a2); }
.t3 { --tone: var(--a3); }
.t4 { --tone: var(--ink-2); }
.t5 { --tone: var(--a1); }
.card--theme .num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--tone, var(--a1));
  display: block;
  margin-bottom: 0.4rem;
  font-weight: 500;
}

/* motif stroke/fill hooks used by the inline SVGs */
.mo-edge { stroke: var(--ink-2); stroke-width: 1.5; fill: none; opacity: 0.5; }
.mo-node { fill: var(--tone, var(--a1)); }
.mo-node-open { fill: var(--surface); stroke: var(--tone, var(--a1)); stroke-width: 1.8; }
.mo-face { fill: var(--tone, var(--a1)); opacity: 0.16; }
.mo-accent { stroke: var(--tone, var(--a1)); stroke-width: 1.8; fill: none; }

/* — publications — */
.pub-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--line);
}
.pub-toolbar .label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-2);
  margin-right: 0.35rem;
}
.filter {
  font: inherit;
  font-size: 0.85rem;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-2);
  cursor: pointer;
  transition: all 0.15s ease;
}
.filter:hover { color: var(--ink); border-color: var(--ink-2); }
.filter[aria-pressed='true'] {
  background: var(--a1);
  border-color: var(--a1);
  color: var(--a1-ink);
  font-weight: 600;
}

.pub-list { list-style: none; margin: 0; padding: 0; }

.pub {
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--line);
  margin: 0;
}
.pub[hidden] { display: none; }

/* Papers are grouped under a year; the heading is a rule with the year set
   into it, and it hides itself when a filter empties the group. */
.pub-section-head {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
}
.pub-year { margin-bottom: 2.25rem; }
.pub-year[hidden] { display: none; }
.pub-year .year-head {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--a1);
  margin: 0;
  font-variant-numeric: tabular-nums;
}
.pub-year .year-head::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--line);
}
.pub-year .pub-list > .pub:last-child { border-bottom: 0; }
.pub-list--flush { margin-bottom: 2.5rem; }
.pub-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.06rem;
  font-weight: 700;
  letter-spacing: -0.012em;
  line-height: 1.32;
  margin: 0 0 0.35rem;
}
.pub-title a { color: var(--ink); text-decoration: none; }
.pub-title a:hover { color: var(--a1); }
.pub-authors {
  font-size: 0.9rem;
  color: var(--ink-2);
  margin: 0 0 0.4rem;
}
.pub-authors .me { color: var(--ink); font-weight: 600; }
.pub-venue {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.76rem;
  color: var(--ink-2);
  margin: 0 0 0.6rem;
}
.pub-venue em { color: var(--a1); font-style: normal; font-weight: 500; }
.pub-links { display: flex; flex-wrap: wrap; gap: 0.4rem; align-items: center; }
.pub-link {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.02em;
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink-2);
  text-decoration: none;
  transition: all 0.15s ease;
}
.pub-link:hover { color: var(--a1); border-color: var(--a1); background: var(--glow); }

.pub-badge {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  background: var(--a1);
  color: var(--a1-ink);
  vertical-align: 0.15em;
  margin-left: 0.4rem;
  font-weight: 500;
}

/* — static bipartite diagram (publications) —
   Generated at build time as inline SVG. No JavaScript: the hover highlight
   is pure CSS :has(), which simply does nothing in browsers without it. */
.bipfig {
  margin: 0 0 1rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  overflow: hidden;
}
.bipfig-scroll { overflow-x: auto; padding: 1.25rem 0.5rem 0.5rem; }
.bipfig figcaption {
  border-top: 1px solid var(--line);
  background: var(--bg-soft);
  padding: 0.7rem 1rem;
  font-size: 0.83rem;
  color: var(--ink-2);
}
svg.bip {
  display: block;
  width: 100%;
  min-width: 46rem;
  height: auto;
}
.bip-edge {
  fill: none;
  stroke: var(--ink-2);
  stroke-width: 1;
  opacity: 0.35;
  transition: opacity 0.15s ease;
}
.bip-dot { fill: var(--a1); }
.bip-dot--paper { fill: var(--surface); stroke: var(--a2); stroke-width: 2; }
.bip-label {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 11.5px;
  fill: var(--ink);
}
.bip-label--left { text-anchor: end; font-weight: 600; }
.bip-count {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9.5px;
  fill: var(--ink-2);
}
.bip-concept, .bip-paper { transition: opacity 0.15s ease; }
.bip-concept:hover .bip-dot { r: 9; }
.bip-concept:hover { cursor: default; }

/* — collaborators — */
.collab-panel {
  margin-top: 1.25rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--a1);
  border-radius: 0 12px 12px 0;
  background: var(--bg-soft);
  padding: 1.1rem 1.3rem;
}
.collab-panel[hidden] { display: none; }
.collab-panel-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 0.6rem;
}
.collab-panel-head h3 { margin: 0; font-size: 1.05rem; }
.collab-panel-head .netfig-btn { margin-left: auto; }

.collab-list {
  border-top: 1px solid var(--line);
}
.collab {
  border-bottom: 1px solid var(--line);
}
/* One-paper collaborators stay out of the visible list (it would be mostly
   names), but the <details> element itself is kept in the DOM — the network
   graph reads this markup directly, so hiding it here would also delete that
   person from the graph. */
.collab[data-count='1'] { display: none; }
.collab > summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.8rem 0.2rem;
  cursor: pointer;
  list-style: none;
  transition: color 0.15s ease;
}
.collab > summary::-webkit-details-marker { display: none; }
.collab > summary::after {
  content: '+';
  margin-left: auto;
  font-family: 'JetBrains Mono', monospace;
  color: var(--ink-2);
  font-size: 1rem;
  line-height: 1;
}
.collab[open] > summary::after { content: '–'; }
.collab > summary:hover { color: var(--a1); }
.collab-name { font-weight: 600; }
.collab-count {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--ink-2);
}
.collab-papers {
  margin: 0 0 1rem;
  padding-left: 1.2em;
  font-size: 0.93rem;
  color: var(--ink-2);
}
.collab-papers li { margin-bottom: 0.3em; }
.collab-panel .collab-papers { margin-bottom: 0; }

/* — timeline (news, cv, talks) — */
.timeline { list-style: none; margin: 0; padding: 0; }
/* The rail sits in the middle of the gutter, so the right-aligned date always
   has clear air between it and the dots rather than colliding with them. */
.tl-item {
  display: grid;
  grid-template-columns: 6.5rem 1fr;
  gap: 0 2.75rem;
  padding: 0 0 1.5rem;
  position: relative;
}
.tl-item::before {
  content: '';
  position: absolute;
  left: 7.9rem;
  top: 0.55rem;
  bottom: -0.4rem;
  width: 1px;
  background: var(--line);
}
.tl-item:last-child::before { display: none; }
.tl-item::after {
  content: '';
  position: absolute;
  left: 7.9rem;
  top: 0.5rem;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--a1);
  transform: translateX(-3px);
  box-shadow: 0 0 0 3px var(--bg);
}
/* dots sit on the soft band in those sections, so match the halo to it */
.section--soft .tl-item::after { box-shadow: 0 0 0 3px var(--bg-soft); }
.tl-date {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.76rem;
  color: var(--ink-2);
  padding-top: 0.15rem;
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.tl-body h3 { font-size: 1.02rem; margin-bottom: 0.25rem; }
.tl-body p { font-size: 0.93rem; color: var(--ink-2); margin: 0; }

/* — definition-style CV rows — */
.rows { margin: 0; }
.row {
  display: grid;
  grid-template-columns: 8.5rem 1fr;
  gap: 0 1.5rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
}
.row:last-child { border-bottom: 0; }
.row-key {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.76rem;
  color: var(--ink-2);
  padding-top: 0.2rem;
  font-variant-numeric: tabular-nums;
}
.row-val h3 { font-size: 1.02rem; margin-bottom: 0.2rem; }
.row-val p { font-size: 0.93rem; color: var(--ink-2); margin: 0; }
.row-val p + p { margin-top: 0.3rem; }

/* — stats — */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}
.stat { background: var(--surface); padding: 1.2rem 1.1rem; }
.stat b {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--a1);
  line-height: 1;
  letter-spacing: -0.03em;
}
.stat span {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.67rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-2);
  margin-top: 0.45rem;
}

/* — contact / link list — */
.linklist { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.15rem; }
.linklist a {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.55rem 0.7rem;
  margin-left: -0.7rem;
  border-radius: 9px;
  text-decoration: none;
  color: var(--ink);
  font-size: 0.95rem;
  transition: background-color 0.15s ease;
}
.linklist a:hover { background: var(--glow); }
.linklist a:hover .ll-key { color: var(--a1); }
.linklist svg { width: 17px; height: 17px; flex: none; color: var(--ink-2); }
.ll-key {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-2);
  width: 5.5rem;
  flex: none;
  transition: color 0.15s ease;
}
.ll-val { color: var(--ink); overflow-wrap: anywhere; }

/* — callout — */
.callout {
  border: 1px solid var(--line);
  border-left: 3px solid var(--a1);
  background: var(--bg-soft);
  border-radius: 0 12px 12px 0;
  padding: 1.2rem 1.4rem;
  font-size: 0.95rem;
}
.callout p { margin-bottom: 0.6rem; }
.callout p:last-child { margin-bottom: 0; }

/* — page header — */
.page-head {
  padding: clamp(2.5rem, 6vw, 4rem) 0 clamp(1.5rem, 3vw, 2.5rem);
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.page-head h1 { font-size: clamp(2rem, 5vw, 3.1rem); margin-bottom: 0.3em; }
.page-head .lede { color: var(--ink-2); max-width: 42rem; }
/* faint network wash bleeding in from the right */
.page-head .wash {
  position: absolute;
  right: -4rem; top: 50%;
  transform: translateY(-50%);
  width: 26rem; height: 16rem;
  opacity: 0.5;
  pointer-events: none;
  color: var(--a1);
}
.page-head .wash svg { width: 100%; height: 100%; }

/* 8. Footer --------------------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--bg-soft);
  padding: 3rem 0 2.5rem;
  margin-top: 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 13rem), 1fr));
  gap: 2rem;
  margin-bottom: 2.5rem;
}
.footer-grid h4 {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-2);
  margin-bottom: 0.9rem;
  font-weight: 500;
}
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 0.4rem; }
.footer-grid a {
  color: var(--ink-2);
  text-decoration: none;
  font-size: 0.92rem;
}
.footer-grid a:hover { color: var(--a1); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
  color: var(--ink-2);
}
.footer-bottom p { margin: 0; }

/* 9. Responsive ----------------------------------------------------------- */

@media (max-width: 62rem) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-portrait { max-width: 15rem; justify-self: start; order: -1; }
  .page-head .wash { display: none; }
}

@media (max-width: 46rem) {
  body { font-size: 1rem; }

  .nav-toggle { display: inline-flex; align-items: center; order: 3; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--surface);
    border-block: 1px solid var(--line);
    padding: 0.5rem;
    box-shadow: var(--shadow);
  }
  .nav-links[data-open='true'] { display: flex; }
  .nav-links a { padding: 0.7rem 0.8rem; font-size: 1rem; }
  .site-header { position: sticky; }
  .nav { position: relative; flex-wrap: wrap; }
  .nav-right { margin-left: auto; }


  .tl-item { grid-template-columns: 1fr; gap: 0.3rem; padding-left: 1.25rem; }
  .tl-item::before { left: 0; transform: none; }
  .tl-item::after { left: 0; transform: translateX(-3px); }
  .tl-date { text-align: left; }

  .row { grid-template-columns: 1fr; gap: 0.25rem; }
  .row-key { padding-top: 0; }

  .linklist a { flex-wrap: wrap; }
  .ll-key { width: auto; }
}

/* 10. Motion & print ------------------------------------------------------ */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* gentle entrance for cards; disabled above under reduced motion */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.reveal.is-in { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

@media print {
  .site-header, .site-footer, .netfig, .hero-actions, .pub-toolbar { display: none !important; }
  body { background: #fff; color: #000; font-size: 11pt; }
  a { color: #000; text-decoration: underline; }
  .card, .stat { border: 1px solid #ccc; }
  .section { padding: 1rem 0; }
}