/* ==========================================================================
   Md Mahinur Alam · academic homepage
   Layout: sticky profile sidebar beside one reading column;
           a single column on phones.
   Every colour is a token below. Light is the default; the dark block only
   redefines tokens and applies when a visitor picks dark with the theme button.
   ========================================================================== */

:root {
  /* colour */
  --paper: #ffffff;
  --paper-2: #f4f6fa;
  --paper-3: #e9edf4;
  --ink: #18202e;
  --ink-2: #455064;
  --ink-3: #6b7689;
  --rule: #e1e5ee;
  --accent: #2747c7;
  --accent-ink: #1c369c;
  --accent-soft: #ebf0ff;
  --on-accent: #ffffff;
  --signal: #9a5800;
  --signal-soft: #fff2d9;
  --teal: #0a7069;
  --teal-soft: #e0f3f0;
  --violet: #6338c2;
  --violet-soft: #efe9ff;
  --green: #276f39;
  --green-soft: #e4f4e7;
  --rose: #a8204f;
  --rose-soft: #fcebf1;
  --figure-bg: #f3f5fa;
  --figure-paper: #ffffff;
  --masthead-bg: rgba(255, 255, 255, 0.86);
  --shadow: 0 1px 2px rgba(18, 26, 44, 0.05), 0 6px 20px rgba(18, 26, 44, 0.06);
  --focus: #2747c7;

  /* type */
  --font-display: "Newsreader", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --font-body: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-md: 1.0625rem;
  --fs-lg: 1.25rem;
  --fs-xl: 1.625rem;
  --fs-2xl: 2rem;

  /* shape */
  --radius: 12px;
  --radius-sm: 8px;
  --header-h: 60px;
  --safe-top: env(safe-area-inset-top, 0px);
  /* page width: the content spans up to --page-max, with side gutters that grow on wide screens */
  --page-max: 1400px;
  --gutter: max(16px, 3vw);
  color-scheme: light;
}

:root[data-theme="dark"] {
  --paper: #0d1117;
  --paper-2: #141a23;
  --paper-3: #1c2330;
  --ink: #e8ecf3;
  --ink-2: #b6bfcd;
  --ink-3: #8c96a8;
  --rule: #262f3d;
  --accent: #93a8ff;
  --accent-ink: #b8c6ff;
  --accent-soft: #19213e;
  --on-accent: #0d1117;
  --signal: #f2b24c;
  --signal-soft: #2b2010;
  --teal: #63d1c7;
  --teal-soft: #0f2a28;
  --violet: #bba5ff;
  --violet-soft: #221b3c;
  --green: #82d496;
  --green-soft: #13271a;
  --rose: #f59bc1;
  --rose-soft: #2d1421;
  --figure-bg: #e8ecf4;
  --masthead-bg: rgba(13, 17, 23, 0.86);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.35);
  --focus: #93a8ff;
  color-scheme: dark;
}

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }

html {
  /* 15px base (93.75% of the browser default); every font size below is in rem, so this scales all text */
  font-size: 93.75%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + var(--safe-top) + 16px);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  padding-left: max(var(--gutter), env(safe-area-inset-left, 0px));
  padding-right: max(var(--gutter), env(safe-area-inset-right, 0px));
}

/* paints the phone status-bar band behind the sticky header */
body::before {
  content: "";
  position: fixed;
  inset: 0 0 auto;
  height: env(safe-area-inset-top, 0px);
  z-index: 60;
  background: var(--paper);
}

img, svg { max-width: 100%; }
img { height: auto; display: block; }

a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--accent) 35%, transparent);
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
a:hover { color: var(--accent-ink); text-decoration-color: currentColor; }

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
  border-radius: 4px;
}

h1, h2, h3, h4 { margin: 0; color: var(--ink); text-wrap: balance; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; }
strong, b { font-weight: 600; }

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

.icon {
  width: 1em; height: 1em;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  vertical-align: -0.125em;
}

.skip-link {
  position: absolute;
  left: 12px; top: -48px;
  z-index: 100;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 600;
  text-decoration: none;
}
.skip-link:focus { top: calc(var(--safe-top) + 10px); }

/* --------------------------------------------------------------------------
   Masthead
   -------------------------------------------------------------------------- */

.masthead {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 50;
  margin-left: calc(-1 * max(var(--gutter), env(safe-area-inset-left, 0px)));
  margin-right: calc(-1 * max(var(--gutter), env(safe-area-inset-right, 0px)));
  padding-left: max(var(--gutter), env(safe-area-inset-left, 0px));
  padding-right: max(var(--gutter), env(safe-area-inset-right, 0px));
  background: var(--masthead-bg);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--rule);
}

.masthead__inner {
  max-width: var(--page-max);
  height: var(--header-h);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand { display: inline-flex; align-items: center; flex: none; border-radius: 6px; text-decoration: none; }
.brand__mark { display: block; width: 36px; height: 36px; border-radius: 4.5px; }
/* the logo tile is near-black, so give it a faint edge on the dark theme */
:root[data-theme="dark"] .brand__mark { box-shadow: 0 0 0 1px var(--rule); }

.nav { margin-left: auto; }
.nav__list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav__list a {
  display: block;
  padding: 6px 10px;
  border-radius: 7px;
  color: var(--ink-2);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
}
.nav__list a:hover { color: var(--ink); background: var(--paper-2); }
.nav__list a[aria-current="true"] { color: var(--accent); background: var(--accent-soft); }

.masthead__tools { display: flex; align-items: center; gap: 6px; }

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 38px; height: 38px;
  padding: 0;
  border: 1px solid var(--rule);
  border-radius: 10px;
  background: var(--paper);
  color: var(--ink-2);
  font-size: 1.125rem;
  cursor: pointer;
}
.icon-btn:hover { color: var(--ink); background: var(--paper-2); }

.theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

.nav-toggle { display: none; }

@media (max-width: 1179px) {
  .nav-toggle { display: inline-grid; }
  .masthead__tools { margin-left: auto; }
  .nav {
    position: absolute;
    top: calc(100% + 1px);
    right: max(var(--gutter), env(safe-area-inset-right, 0px));
    left: auto;
    display: none;
    min-width: 220px;
    padding: 8px;
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    background: var(--paper);
    box-shadow: var(--shadow);
  }
  .nav.is-open { display: block; }
  .nav__list { flex-direction: column; align-items: stretch; }
  .nav__list a { padding: 9px 12px; font-size: 0.95rem; }
}

/* --------------------------------------------------------------------------
   Page grid
   -------------------------------------------------------------------------- */

.layout {
  max-width: var(--page-max);
  margin: 0 auto;
  padding-block: 28px 56px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-areas: "profile" "about" "sections";
  gap: 28px 52px;
}

.profile  { grid-area: profile; }
.about    { grid-area: about; min-width: 0; }
.sections { grid-area: sections; min-width: 0; display: grid; gap: 56px; }

@media (min-width: 900px) {
  .layout {
    grid-template-columns: 260px minmax(0, 1fr);
    grid-template-areas:
      "profile about"
      "profile sections";
    padding-block: 40px 72px;
    row-gap: 40px;
  }
}

@media (min-width: 900px) and (min-height: 760px) {
  .profile {
    position: sticky;
    top: calc(var(--header-h) + var(--safe-top) + 28px);
    align-self: start;
  }
}

/* --------------------------------------------------------------------------
   Profile sidebar
   -------------------------------------------------------------------------- */

.profile {
  display: grid;
  gap: 16px;
  align-content: start;
}

.profile__photo {
  width: 100%;
  max-width: 260px;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 14px;
  background: var(--paper-2);
  box-shadow: var(--shadow);
}

.profile__name {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.015em;
}

.profile__role {
  margin-top: 6px;
  color: var(--ink-2);
  font-size: var(--fs-sm);
  line-height: 1.5;
}

.profile__facts {
  list-style: none;
  display: grid;
  gap: 8px;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
  color: var(--ink-2);
  font-size: var(--fs-sm);
  line-height: 1.45;
}
.profile__facts li { display: flex; gap: 9px; align-items: flex-start; min-width: 0; }
.profile__facts .icon { margin-top: 2px; color: var(--accent); }
.profile__facts a { color: var(--ink-2); text-decoration: none; overflow-wrap: anywhere; }
.profile__facts a:hover { color: var(--accent); text-decoration: underline; }

.profile__actions { display: flex; gap: 8px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  padding: 8px 16px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
}
.btn--primary { background: var(--accent); color: var(--on-accent); }
.btn--primary:hover { background: var(--accent-ink); color: var(--on-accent); }
.btn--ghost { background: var(--paper); color: var(--ink); border-color: var(--rule); }
.btn--ghost:hover { background: var(--paper-2); color: var(--ink); }
.profile__actions .btn { flex: 1 1 0; }

.profile__links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.profile__links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  color: var(--ink-2);
  font-size: 0.8125rem;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
}
.profile__links a:hover { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); }

@media (max-width: 899px) {
  .profile {
    grid-template-columns: 112px minmax(0, 1fr);
    column-gap: 18px;
    row-gap: 14px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--rule);
  }
  .profile__photo { grid-row: span 2; width: 112px; border-radius: 12px; }
  .profile__head { align-self: end; }
  .profile__facts, .profile__actions, .profile__links { grid-column: 1 / -1; }
  .profile__facts { border-top: 0; padding-top: 0; }
  .profile__actions { max-width: 420px; }
}

@media (max-width: 420px) {
  .profile { grid-template-columns: 88px minmax(0, 1fr); }
  .profile__photo { width: 88px; }
  .profile__name { font-size: 1.5rem; }
}

/* --------------------------------------------------------------------------
   About
   -------------------------------------------------------------------------- */

.about { display: grid; gap: 22px; align-content: start; }

.callout {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 16px;
  border: 1px solid color-mix(in srgb, var(--accent) 28%, var(--rule));
  border-radius: var(--radius);
  background: var(--accent-soft);
  color: var(--ink);
  font-size: 0.9375rem;
  line-height: 1.6;
}
.callout .icon { margin-top: 3px; font-size: 1.125rem; color: var(--accent); }

.prose { display: grid; gap: 14px; font-size: var(--fs-md); line-height: 1.7; color: var(--ink); }
.prose strong { color: var(--ink); }

/* --------------------------------------------------------------------------
   Section scaffolding
   -------------------------------------------------------------------------- */

.section { display: grid; gap: 18px; min-width: 0; }

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule);
}
.section__title {
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.015em;
}
.section__meta {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--ink-3);
  letter-spacing: 0.02em;
}
.section__lede { color: var(--ink-2); font-size: 0.9375rem; max-width: 72ch; }

.subhead {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.pill-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--ink-2);
  text-decoration: none;
}
.pill-link:hover { color: var(--accent); border-color: var(--accent); }

/* badges: news types, venue tags, publication tags */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 1px 8px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  line-height: 1.7;
  white-space: nowrap;
  background: var(--paper-3);
  color: var(--ink-2);
}
.badge--paper     { background: var(--accent-soft); color: var(--accent); }
.badge--award     { background: var(--signal-soft); color: var(--signal); }
.badge--milestone { background: var(--teal-soft); color: var(--teal); }
.badge--feat      { background: var(--violet-soft); color: var(--violet); }

/* collapsible "more" blocks */
.more { border-top: 1px dashed var(--rule); padding-top: 12px; }
.more > summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--accent);
}
.more > summary::-webkit-details-marker { display: none; }
.more > summary::before {
  content: "";
  width: 7px; height: 7px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(-45deg);
  transition: transform 0.2s ease;
}
.more[open] > summary::before { transform: rotate(45deg); }
.more > summary .count { font-family: var(--font-mono); font-size: var(--fs-xs); color: var(--ink-3); font-weight: 500; }
.more__body { margin-top: 14px; }

/* full publication list: collapsed until the visitor opens it */
.pub-all > summary { list-style: none; }
.pub-all > summary::-webkit-details-marker { display: none; }
.pub-all > summary::after {
  content: "";
  width: 7px; height: 7px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
  transition: transform 0.2s ease;
}
.pub-all[open] > summary::after { transform: translateY(2px) rotate(-135deg); }
.pub-all[open] .pub-all__show,
.pub-all:not([open]) .pub-all__hide { display: none; }
.pub-all__body { display: grid; gap: 18px; margin-top: 18px; }

/* --------------------------------------------------------------------------
   News
   -------------------------------------------------------------------------- */

.news-scroll {
  max-height: 18rem;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-right: 14px;
  border-bottom: 1px solid var(--rule);
}
/* Always-visible scrollbar (Chrome, Edge, Safari) so readers can see the list scrolls */
.news-scroll::-webkit-scrollbar { width: 8px; }
.news-scroll::-webkit-scrollbar-track { background: var(--paper-3); border-radius: 8px; }
.news-scroll::-webkit-scrollbar-thumb { background: var(--ink-3); border-radius: 8px; }
.news-scroll::-webkit-scrollbar-thumb:hover { background: var(--ink-2); }
/* Firefox */
@supports (-moz-appearance: none) {
  .news-scroll { scrollbar-width: thin; scrollbar-color: var(--ink-3) var(--paper-3); }
}
.news-scroll:focus-visible { outline: 2px solid var(--focus); outline-offset: 4px; }
/* soft fade at the bottom edge while more news is below; removed once scrolled to the end */
.news-scroll::after {
  content: "";
  position: sticky;
  bottom: 0;
  display: block;
  height: 40px;
  margin-top: -40px;
  background: linear-gradient(to bottom, transparent, var(--paper));
  pointer-events: none;
  transition: opacity 0.2s ease;
}
.news-scroll.is-end::after { opacity: 0; }

.news { list-style: none; display: grid; }
/* one compact row per item: date, type badge, then the text */
.news__item {
  display: grid;
  grid-template-columns: 172px minmax(0, 1fr);
  gap: 2px 14px;
  align-items: baseline;
  padding: 7px 0;
  border-bottom: 1px solid var(--rule);
}
.news__item:first-child { padding-top: 0; }
.news__item:last-child { border-bottom: 0; }
.news__meta { display: grid; grid-template-columns: 84px auto; column-gap: 6px; align-items: center; justify-items: start; }
.news__date {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--ink-2);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.news__text { font-size: 0.9375rem; line-height: 1.5; color: var(--ink); }

@media (max-width: 640px) {
  .news-scroll { max-height: 26rem; }
  .news__item { grid-template-columns: minmax(0, 1fr); padding: 8px 0; }
  .news__meta { display: flex; gap: 8px; align-items: center; }
}

/* --------------------------------------------------------------------------
   Selected publications (figure cards)
   -------------------------------------------------------------------------- */

.highlights { display: grid; gap: 16px; }

.hl {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  padding: 14px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--paper);
}
.hl:hover { border-color: color-mix(in srgb, var(--accent) 35%, var(--rule)); }

@media (min-width: 640px) {
  .hl { grid-template-columns: 236px minmax(0, 1fr); gap: 20px; align-items: center; }
}

.hl__fig {
  margin: 0;
  align-self: center;
  display: grid;
  gap: 8px;
  min-width: 0;
}
.hl__zoom {
  display: block;
  width: 100%;
  padding: 0;
  border: 1px solid var(--rule);
  border-radius: 9px;
  overflow: hidden;
  background: var(--figure-paper);
  cursor: zoom-in;
}
.hl__zoom:hover { border-color: color-mix(in srgb, var(--accent) 45%, var(--rule)); }
/* every figure sits in the same 16:10 frame and is scaled to fit inside it, never cropped */
.hl__fig img { width: 100%; height: auto; aspect-ratio: 16 / 10; object-fit: contain; display: block; background: var(--figure-paper); }
.hl__meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 8px; margin-top: 2px; }
.hl__venue {
  padding: 2px 8px;
  border-radius: 6px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.hl__body { display: grid; gap: 6px; align-content: start; min-width: 0; }
.hl__title { font-size: 1.0625rem; font-weight: 600; line-height: 1.4; color: var(--ink); text-wrap: wrap; }
.hl__title a { color: inherit; text-decoration: none; }
.hl__title a:hover { color: var(--accent); text-decoration: underline; }
.hl__authors { font-size: 0.875rem; color: var(--ink-2); }
.hl__venue-line { font-size: 0.875rem; color: var(--ink-2); font-style: italic; }
.hl__summary { font-size: 0.9rem; color: var(--ink); line-height: 1.55; margin-top: 2px; }

.chips { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 9px;
  border-radius: 999px;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  color: var(--ink-2);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}
.chip--award { background: var(--signal-soft); border-color: transparent; color: var(--signal); font-weight: 600; }

.links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; }
.link-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border: 1px solid var(--rule);
  border-radius: 8px;
  color: var(--ink);
  font-size: 0.8125rem;
  font-weight: 600;
  text-decoration: none;
  background: var(--paper);
}
.link-btn .icon { color: var(--accent); }
.link-btn:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
/* placeholder for code that is not public yet */
.link-btn--soon,
.link-btn--soon:hover { border-style: dashed; border-color: var(--rule); background: var(--paper-2); color: var(--ink-3); cursor: default; }
.link-btn--soon .icon { color: var(--ink-3); }

/* lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: grid;
  place-items: center;
  padding: max(24px, env(safe-area-inset-top, 0px)) max(16px, env(safe-area-inset-right, 0px)) max(24px, env(safe-area-inset-bottom, 0px)) max(16px, env(safe-area-inset-left, 0px));
  background: rgba(8, 11, 18, 0.82);
}
.lightbox[hidden] { display: none !important; }
.lightbox__fig { margin: 0; max-width: min(1000px, 100%); display: grid; gap: 10px; justify-items: center; }
/* show figures at their own size (never blown up) so small paper figures stay sharp */
.lightbox__fig img { width: auto; height: auto; max-width: 100%; max-height: 80vh; border-radius: 10px; background: #ffffff; }
.lightbox__fig figcaption { color: #e8ecf3; font-size: 0.875rem; text-align: center; }
.lightbox__close {
  position: absolute;
  top: max(14px, env(safe-area-inset-top, 0px));
  right: max(14px, env(safe-area-inset-right, 0px));
  width: 42px; height: 42px;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.14);
  color: #ffffff;
  font-size: 1.25rem;
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   Publications
   -------------------------------------------------------------------------- */

.scholar {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 20px;
  font-size: 0.9375rem;
  color: var(--ink-2);
}
.scholar b { font-family: var(--font-display); font-size: 1.375rem; font-weight: 600; color: var(--ink); margin-right: 4px; font-variant-numeric: tabular-nums; }
.scholar__asof { font-family: var(--font-mono); font-size: var(--fs-xs); color: var(--ink-3); }

.pub-tools { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; }
.search {
  position: relative;
  flex: 1 1 260px;
  max-width: 420px;
}
.search .icon { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--ink-3); }
.search input {
  width: 100%;
  min-height: 40px;
  padding: 8px 12px 8px 36px;
  border: 1px solid var(--rule);
  border-radius: 10px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.9375rem;
}
.search input::placeholder { color: var(--ink-3); }
.search input:focus { outline: 2px solid var(--focus); outline-offset: 1px; border-color: transparent; }
.pub-count { font-family: var(--font-mono); font-size: var(--fs-xs); color: var(--ink-3); }

.legend { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: 0.8125rem; color: var(--ink-3); }
.legend span { display: inline-flex; align-items: center; gap: 6px; }

.pub-group { display: grid; gap: 4px; }
.pub-group[hidden] { display: none; }

.pubs { list-style: none; display: grid; }
.pub {
  display: grid;
  grid-template-columns: 128px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--rule);
}
.pub:last-child { border-bottom: 0; }
.pub[hidden] { display: none; }

.tag {
  justify-self: start;
  align-self: start;
  margin-top: 2px;
  padding: 2px 8px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.6;
  white-space: nowrap;
}
.tag--journal  { background: var(--accent-soft); color: var(--accent); }
.tag--conf     { background: var(--teal-soft); color: var(--teal); }
.tag--workshop { background: var(--violet-soft); color: var(--violet); }
.tag--review   { background: var(--signal-soft); color: var(--signal); }
.tag--revision { background: var(--rose-soft); color: var(--rose); }
.tag--domestic { background: var(--green-soft); color: var(--green); }
.tag--prep     { background: var(--paper-3); color: var(--ink-2); }

.pub__body { display: grid; gap: 3px; min-width: 0; }
.pub__title { font-weight: 600; font-size: 0.96875rem; line-height: 1.45; color: var(--ink); }
a.pub__title { text-decoration: none; }
a.pub__title:hover { color: var(--accent); text-decoration: underline; }
.pub__authors { font-size: 0.875rem; color: var(--ink-2); }
.pub__authors .me { color: var(--ink); font-weight: 600; text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--accent) 50%, transparent); text-underline-offset: 3px; }
.pub__venue { font-size: 0.875rem; color: var(--ink-2); }
.pub__venue em { color: var(--ink-2); }
.metric {
  display: inline-block;
  margin-left: 6px;
  padding: 0 6px;
  border-radius: 5px;
  border: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-style: normal;
  color: var(--ink-3);
  white-space: nowrap;
}
.pub__links { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 5px; }
.pub__links .link-btn { padding: 3px 10px; font-size: 0.78rem; border-radius: 7px; }
.pub__award {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 2px;
  padding: 1px 9px;
  border-radius: 999px;
  background: var(--signal-soft);
  color: var(--signal);
  font-size: 0.8125rem;
  font-weight: 600;
}

@media (max-width: 560px) {
  .pub { grid-template-columns: minmax(0, 1fr); }
}

.empty-note { font-size: 0.9375rem; color: var(--ink-3); }

/* --------------------------------------------------------------------------
   Honors
   -------------------------------------------------------------------------- */

.honors { list-style: none; display: grid; }
.honors li {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 0.9375rem;
  line-height: 1.55;
}
.honors li:last-child { border-bottom: 0; }
.honors__year {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--ink-2);
  padding-top: 2px;
  font-variant-numeric: tabular-nums;
}
.honors__text a { font-size: 0.8125rem; font-weight: 600; white-space: nowrap; }
.honors .trophy { color: var(--signal); margin-right: 6px; }

@media (max-width: 520px) {
  .honors li { grid-template-columns: minmax(0, 1fr); gap: 0; }
}

/* --------------------------------------------------------------------------
   Education / experience entries
   -------------------------------------------------------------------------- */

.entries { display: grid; gap: 26px; }
.entry { display: grid; gap: 6px; }
.entry__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 2px 16px;
}
.entry__role { font-size: 1.0625rem; font-weight: 600; line-height: 1.4; }
.entry__date {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--ink-2);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.entry__org { font-size: 0.9375rem; color: var(--ink-2); font-style: italic; }
.entry__org a { font-style: italic; }
.entry__meta { font-size: 0.9375rem; color: var(--ink); }
.entry__meta .sep { color: var(--ink-3); margin: 0 6px; }
.entry__list { display: grid; gap: 5px; padding-left: 20px; font-size: 0.9375rem; line-height: 1.6; color: var(--ink); }
.entry__list li::marker { color: var(--ink-3); }

.projects-in { display: grid; gap: 14px; margin-top: 8px; }
.subproj {
  display: grid;
  gap: 6px;
  padding: 12px 14px;
  border-left: 3px solid var(--accent-soft);
  background: var(--paper-2);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.subproj__head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 2px 14px; }
.subproj__title { font-size: 0.9688rem; font-weight: 600; }
.subproj .entry__list { font-size: 0.9rem; }

/* --------------------------------------------------------------------------
   Projects
   -------------------------------------------------------------------------- */

.projects { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 290px), 1fr)); gap: 14px; }
.proj {
  display: grid;
  grid-template-rows: auto 1fr auto auto;
  gap: 10px;
  padding: 16px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--paper);
}
.proj__title { font-size: 1rem; font-weight: 600; line-height: 1.4; }
.proj__desc { font-size: 0.875rem; color: var(--ink-2); line-height: 1.6; }
.proj__metric { font-family: var(--font-mono); font-size: 0.75rem; color: var(--teal); font-weight: 500; }
.proj__foot { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; }
.stack { list-style: none; display: flex; flex-wrap: wrap; gap: 5px; }
.stack li {
  padding: 1px 7px;
  border-radius: 5px;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  font-size: 0.75rem;
  color: var(--ink-2);
}

/* --------------------------------------------------------------------------
   Key/value rows (service, skills)
   -------------------------------------------------------------------------- */

.kv { margin: 0; display: grid; }
.kv__row {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 4px 20px;
  padding: 11px 0;
  border-bottom: 1px solid var(--rule);
}
.kv__row:last-child { border-bottom: 0; }
.kv dt { font-weight: 600; font-size: 0.9375rem; color: var(--ink); }
.kv dd { margin: 0; font-size: 0.9375rem; color: var(--ink-2); line-height: 1.6; }
.kv .dot { color: var(--ink-3); margin: 0 6px; }

@media (max-width: 560px) {
  .kv__row { grid-template-columns: minmax(0, 1fr); }
}

/* --------------------------------------------------------------------------
   Collaboration + contact
   -------------------------------------------------------------------------- */

.engage {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
  gap: 16px;
}
.card {
  display: grid;
  gap: 14px;
  align-content: start;
  padding: 20px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--paper);
}
.card__title { font-family: var(--font-display); font-size: var(--fs-xl); font-weight: 600; line-height: 1.2; }
.card__lede { font-size: 0.9375rem; color: var(--ink-2); }

.topics { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; }
.topics li {
  padding: 4px 10px;
  border-radius: 8px;
  font-size: 0.8125rem;
  font-weight: 500;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  color: var(--ink);
}
.topics li:nth-child(4n + 1) { background: var(--accent-soft); color: var(--accent); border-color: transparent; }
.topics li:nth-child(4n + 2) { background: var(--teal-soft); color: var(--teal); border-color: transparent; }
.topics li:nth-child(4n + 3) { background: var(--signal-soft); color: var(--signal); border-color: transparent; }
.topics li:nth-child(4n + 4) { background: var(--violet-soft); color: var(--violet); border-color: transparent; }

.contact-list { margin: 0; display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 10px 14px; font-size: 0.9375rem; }
.contact-list dt {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding-top: 3px;
}
.contact-list dd { margin: 0; color: var(--ink); min-width: 0; overflow-wrap: anywhere; }
.email-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 9px;
  border: 1px solid var(--rule);
  border-radius: 7px;
  background: var(--paper);
  color: var(--ink-2);
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
}
.copy-btn:hover { color: var(--accent); border-color: var(--accent); }

@media (max-width: 420px) {
  .contact-list { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  .contact-list dd { margin-bottom: 8px; }
}

/* --------------------------------------------------------------------------
   Footer + back to top
   -------------------------------------------------------------------------- */

.site-foot {
  max-width: var(--page-max);
  margin: 0 auto;
  padding-block: 24px max(28px, env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--rule);
  font-size: 0.8125rem;
  color: var(--ink-3);
  text-align: center;
}
.site-foot .sep { margin: 0 8px; }

.to-top {
  position: fixed;
  right: max(18px, env(safe-area-inset-right, 0px));
  bottom: max(18px, env(safe-area-inset-bottom, 0px));
  z-index: 40;
  width: 44px; height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--rule);
  border-radius: 50%;
  background: var(--paper);
  color: var(--ink);
  box-shadow: var(--shadow);
  font-size: 1.125rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
}
.to-top.is-on { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { color: var(--accent); border-color: var(--accent); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

@media print {
  .masthead, .to-top, .pub-tools, .pub-all > summary, .theme-toggle, .nav-toggle { display: none !important; }
  .layout { display: block; }
  .profile { position: static; }
  .more:not([open]) > *:not(summary) { display: block; }
  a { color: inherit; text-decoration: none; }
}