/* ============================================================
   REALIZE Lab — design system
   InterVariable (UI/body & display) · JetBrains Mono (meta). No serif, no italics.
   ============================================================ */

/* ---------- Fonts (self-hosted) ---------- */
@font-face {
  font-family: "InterVariable";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("/assets/fonts/InterVariable.woff2") format("woff2");
}
@font-face {
  font-family: "JetBrains Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("/assets/fonts/jetbrains-mono-400.woff2") format("woff2");
}
@font-face {
  font-family: "JetBrains Mono";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("/assets/fonts/jetbrains-mono-500.woff2") format("woff2");
}

/* ---------- Tokens (light) ---------- */
:root {
  --bg-primary: #fbfbf9;
  --bg-secondary: #f2f1ec;
  --bg-card: #ffffff;
  --bg-elevated: #ffffff;

  --border-subtle: #e8e6df;
  --border-medium: #d6d3c8;

  --text-primary: #111113;
  --text-secondary: #3a3a3f;
  --text-muted: #71717a;
  --text-inverse: #fbfbf9;

  --accent: #2c5fd1;
  --accent-hover: #244ea8;
  --accent-light: rgba(44, 95, 209, 0.08);

  --highlight: #b31b1b;

  --content-width: min(92%, 1120px);
  --reading-width: min(92%, 880px);

  --font-body: "InterVariable", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-display: "InterVariable", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  --radius-sm: 6px;
  --radius: 8px;
  --radius-lg: 14px;

  --shadow-xs: 0 1px 2px rgba(15, 15, 20, 0.04);
  --shadow-sm: 0 1px 3px rgba(15, 15, 20, 0.05), 0 1px 2px rgba(15, 15, 20, 0.03);
  --shadow-md: 0 4px 14px -2px rgba(15, 15, 20, 0.06), 0 2px 6px -1px rgba(15, 15, 20, 0.04);
  --shadow-lg: 0 12px 32px -8px rgba(15, 15, 20, 0.12), 0 4px 12px -2px rgba(15, 15, 20, 0.06);

  --header-h: 64px;
  color-scheme: light;
}

/* ---------- Tokens (dark) ---------- */
:root[data-theme="dark"] {
  --bg-primary: #0e0e10;
  --bg-secondary: #18181b;
  --bg-card: #131316;
  --bg-elevated: #1a1a1e;

  --border-subtle: #26262b;
  --border-medium: #34343a;

  --text-primary: #f4f4f5;
  --text-secondary: #d4d4d8;
  --text-muted: #8b8b93;
  --text-inverse: #0e0e10;

  --accent: #7aa2f7;
  --accent-hover: #a8c0ff;
  --accent-light: rgba(122, 162, 247, 0.12);

  --highlight: #ff6b6b;

  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 4px 14px -2px rgba(0, 0, 0, 0.45), 0 2px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 12px 32px -8px rgba(0, 0, 0, 0.6), 0 4px 12px -2px rgba(0, 0, 0, 0.4);
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root[data-theme="system"] {
    --bg-primary: #0e0e10;
    --bg-secondary: #18181b;
    --bg-card: #131316;
    --bg-elevated: #1a1a1e;
    --border-subtle: #26262b;
    --border-medium: #34343a;
    --text-primary: #f4f4f5;
    --text-secondary: #d4d4d8;
    --text-muted: #8b8b93;
    --text-inverse: #0e0e10;
    --accent: #7aa2f7;
    --accent-hover: #a8c0ff;
    --accent-light: rgba(122, 162, 247, 0.12);
    --highlight: #ff6b6b;
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 4px 14px -2px rgba(0, 0, 0, 0.45), 0 2px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 32px -8px rgba(0, 0, 0, 0.6), 0 4px 12px -2px rgba(0, 0, 0, 0.4);
    color-scheme: dark;
  }
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 15.5px;
  line-height: 1.65;
  font-feature-settings: "ss01", "cv11", "calt";
  overflow-x: hidden;
  transition: background 0.25s ease, color 0.25s ease;
}

img, video { max-width: 100%; height: auto; }

a { color: var(--accent); text-decoration: none; transition: color 0.15s ease; }
a:hover, a:focus-visible { color: var(--accent-hover); }

/* No italics anywhere — emphasis uses weight, not slant. */
em, i, cite, address, var, dfn { font-style: normal; font-weight: 600; }

.container { max-width: var(--content-width); margin: 0 auto; padding: 0 1.5rem; }

/* ---------- Accessibility ---------- */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%);
  white-space: nowrap; border: 0;
}

.skip-link {
  position: fixed;
  top: 0.5rem; left: 0.5rem;
  z-index: 1000;
  padding: 0.6rem 1rem;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius);
  transform: translateY(-150%);
  transition: transform 0.2s ease;
}
.skip-link:focus { transform: translateY(0); color: #fff; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}

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

/* ---------- Shared headings ---------- */
.section-title {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--border-subtle);
}

.page-head { padding: 2.5rem 0 1.5rem; }
.page-head__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.6rem;
}
.page-head__title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
}
.page-head__lede {
  margin-top: 0.85rem;
  max-width: 60ch;
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* ============================================================
   HEADER + MEGA MENU
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg-primary) 88%, transparent);
  backdrop-filter: saturate(1.5) blur(10px);
  -webkit-backdrop-filter: saturate(1.5) blur(10px);
  border-bottom: 1px solid var(--border-subtle);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  height: var(--header-h);
}

.brand { display: inline-flex; align-items: center; gap: 0.55rem; color: var(--text-primary); }
.brand:hover { color: var(--text-primary); }
.brand__logo { display: block; height: 32px; width: auto; border-radius: 6px; }
@media (max-width: 480px) { .brand__logo { height: 28px; } }

.nav { flex: 1; }
.nav__list { list-style: none; display: flex; align-items: center; gap: 0.25rem; }
.nav__item { position: relative; display: flex; align-items: center; }

.nav__link {
  display: inline-block;
  padding: 0.5rem 0.6rem;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
}
.nav__link:hover, .nav__link.is-active { color: var(--text-primary); background: var(--accent-light); }
.nav__link.is-active { color: var(--accent); }

.nav__toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px; height: 28px;
  margin-left: -0.35rem;
  border: none; background: none; cursor: pointer;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
}
.nav__toggle:hover { color: var(--text-primary); }
.nav__chevron { transition: transform 0.2s ease; }
.nav__item.is-open .nav__chevron { transform: rotate(180deg); }

/* Mega panel */
.mega {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  width: max-content;
  max-width: min(92vw, 760px);
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
}
.mega[hidden] { display: none; }
.nav__item.is-open .mega { opacity: 1; transform: translateX(-50%) translateY(0); pointer-events: auto; }

.mega__inner {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(170px, 1fr);
  gap: 1.5rem;
  padding: 1.4rem 1.6rem;
  max-width: none;
}
.mega__col--wide { grid-column: span 1; min-width: 230px; }
.mega__heading {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.7rem;
}
.mega__links { list-style: none; display: flex; flex-direction: column; gap: 0.15rem; }
.mega__links--inline { flex-direction: row; flex-wrap: wrap; gap: 0.35rem; }
.mega__links a {
  display: flex;
  flex-direction: column;
  padding: 0.4rem 0.55rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
}
.mega__links--inline a { padding: 0.3rem 0.6rem; background: var(--bg-secondary); }
.mega__links a:hover { background: var(--accent-light); color: var(--accent); }
.mega__sub { font-size: 0.74rem; font-weight: 400; color: var(--text-muted); margin-top: 0.1rem; }
.mega__count {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-left: 0.3rem;
}

.mega__col--feature { display: flex; }
.mega__feature {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  height: 100%;
}
.mega__feature:hover { border-color: var(--accent); background: var(--accent-light); }
.mega__feature-title { font-weight: 600; color: var(--text-primary); }
.mega__feature-text { font-size: 0.84rem; color: var(--text-muted); line-height: 1.5; }
.mega__feature-cta { font-size: 0.84rem; font-weight: 600; color: var(--accent); margin-top: auto; }

.mega-backdrop { position: fixed; inset: var(--header-h) 0 0 0; z-index: 90; background: transparent; }
.mega-backdrop[hidden] { display: none; }

/* Header controls */
.header-controls { display: flex; align-items: center; gap: 0.4rem; }
.icon-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  height: 38px;
  padding: 0 0.7rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}
.icon-btn:hover { color: var(--text-primary); border-color: var(--border-medium); box-shadow: var(--shadow-xs); }
.icon-btn__kbd {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 0.05rem 0.3rem;
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  color: var(--text-muted);
}
.theme-toggle { width: 38px; justify-content: center; padding: 0; }
.theme-icon { display: none; font-size: 1rem; line-height: 1; }
:root[data-theme="light"] .theme-icon--light,
:root[data-theme="dark"] .theme-icon--dark,
:root[data-theme="system"] .theme-icon--system { display: inline; }

.nav-burger { display: none; width: 38px; justify-content: center; padding: 0; }

/* Mobile nav drawer */
.mobile-nav {
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
  padding: 0.5rem 0;
}
.mobile-nav[hidden] { display: none; }
.mobile-nav__list { list-style: none; max-width: var(--content-width); margin: 0 auto; padding: 0 1.5rem; }
.mobile-nav__item { border-bottom: 1px solid var(--border-subtle); }
.mobile-nav__item:last-child { border-bottom: none; }
.mobile-nav__row { display: flex; align-items: center; justify-content: space-between; }
.mobile-nav__link { flex: 1; padding: 0.85rem 0; font-size: 1rem; font-weight: 600; color: var(--text-primary); }
.mobile-nav__toggle {
  width: 40px; height: 40px;
  border: none; background: none; cursor: pointer;
  color: var(--text-muted);
}
.mobile-nav__toggle svg { transition: transform 0.2s ease; }
.mobile-nav__toggle[aria-expanded="true"] svg { transform: rotate(180deg); }
.mobile-nav__sub { display: flex; flex-direction: column; padding: 0 0 0.6rem 0.5rem; gap: 0.1rem; }
.mobile-nav__sub[hidden] { display: none; }
.mobile-nav__sub a { padding: 0.4rem 0; font-size: 0.9rem; color: var(--text-secondary); }

/* ============================================================
   COMMAND PALETTE
   ============================================================ */
.cmdk { position: fixed; inset: 0; z-index: 300; display: flex; align-items: flex-start; justify-content: center; padding-top: 14vh; }
.cmdk[hidden] { display: none; }
.cmdk__overlay { position: absolute; inset: 0; background: rgba(0,0,0,0.4); backdrop-filter: blur(4px); }
.cmdk__panel {
  position: relative;
  width: min(94vw, 560px);
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: cmdkIn 0.18s cubic-bezier(0.22, 1, 0.36, 1);
}
@keyframes cmdkIn { from { opacity: 0; transform: translateY(-8px) scale(0.98); } to { opacity: 1; transform: none; } }
.cmdk__input-row { display: flex; align-items: center; gap: 0.6rem; padding: 0.85rem 1rem; border-bottom: 1px solid var(--border-subtle); }
.cmdk__icon { color: var(--text-muted); flex-shrink: 0; }
.cmdk__input { flex: 1; border: none; background: none; outline: none; font-family: var(--font-body); font-size: 1rem; color: var(--text-primary); }
.cmdk__input::placeholder { color: var(--text-muted); }
.cmdk__esc { font-family: var(--font-mono); font-size: 0.68rem; color: var(--text-muted); padding: 0.1rem 0.35rem; border: 1px solid var(--border-subtle); border-radius: 4px; }
.cmdk__results { list-style: none; max-height: 56vh; overflow-y: auto; padding: 0.4rem; }
.cmdk__group-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 0.6rem 0.6rem 0.3rem;
}
.cmdk__item { display: flex; align-items: center; gap: 0.7rem; padding: 0.55rem 0.6rem; border-radius: var(--radius-sm); cursor: pointer; }
.cmdk__item[aria-selected="true"], .cmdk__item:hover { background: var(--accent-light); }
.cmdk__item-kind {
  flex-shrink: 0;
  width: 1.6rem; height: 1.6rem;
  display: grid; place-items: center;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--accent);
  background: var(--accent-light);
  border-radius: 5px;
  text-transform: uppercase;
}
.cmdk__item-text { min-width: 0; flex: 1; }
.cmdk__item-title { font-size: 0.9rem; font-weight: 500; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cmdk__item-sub { font-size: 0.76rem; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cmdk__item mark { background: transparent; color: var(--accent); font-weight: 700; }
.cmdk__empty { padding: 1.6rem 1rem; text-align: center; color: var(--text-muted); font-size: 0.9rem; }
.cmdk__empty[hidden] { display: none; }
.cmdk__footer { display: flex; gap: 1rem; padding: 0.6rem 1rem; border-top: 1px solid var(--border-subtle); font-size: 0.72rem; color: var(--text-muted); }
.cmdk__footer kbd { font-family: var(--font-mono); padding: 0 0.25rem; border: 1px solid var(--border-subtle); border-radius: 3px; margin: 0 0.1rem; }

/* ============================================================
   HOME
   ============================================================ */
.hero { padding: 3.5rem 0 2rem; }
.hero__inner { max-width: 64ch; }
.hero__eyebrow { font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); margin-bottom: 1rem; }
.hero__title { font-family: var(--font-display); font-size: clamp(2.4rem, 6vw, 3.8rem); font-weight: 700; line-height: 1.05; letter-spacing: -0.03em; }
.hero__title .accent { color: var(--accent); font-style: normal; }
.hero__lede { margin-top: 1.2rem; max-width: 52ch; font-size: 1.1rem; color: var(--text-secondary); }
.hero__cta { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-top: 1.8rem; }
.btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.65rem 1.2rem;
  font-size: 0.92rem; font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.15s ease;
}
.btn:hover { color: var(--text-primary); border-color: var(--border-medium); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.btn--primary { background: var(--text-primary); color: var(--text-inverse); border-color: var(--text-primary); }
.btn--primary:hover { background: var(--text-secondary); border-color: var(--text-secondary); color: var(--text-inverse); }

.home-areas { padding: 1.5rem 0; }

/* Research-area cards — 2-up grid, shared by Home preview and Research page */
.area-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.2rem; margin-top: 1.2rem; }
.area-grid--research { margin-top: 0; }
.area-card {
  display: flex; flex-direction: column; gap: 0.5rem;
  padding: 1.6rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  transition: box-shadow 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
  scroll-margin-top: calc(var(--header-h) + 1rem);
}
.area-card:hover { box-shadow: var(--shadow-md); transform: translateY(-1px); }
.area-card__title { font-family: var(--font-display); font-weight: 600; font-size: 1.2rem; letter-spacing: -0.01em; color: var(--text-primary); }
.area-card--lg .area-card__title { font-size: 1.5rem; }
.area-card__blurb { color: var(--text-secondary); font-size: 0.92rem; line-height: 1.6; }
.area-card__cta { margin-top: auto; font-size: 0.86rem; font-weight: 600; color: var(--accent); }
@media (max-width: 700px) { .area-grid { grid-template-columns: 1fr; } }

/* ============================================================
   PEOPLE
   ============================================================ */
.people-group { padding: 1.5rem 0; scroll-margin-top: calc(var(--header-h) + 1rem); }
.people-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 1.2rem; margin-top: 1.2rem; }
.person {
  display: flex; flex-direction: column; align-items: center; text-align: center;
  gap: 0.1rem;
  padding: 1.4rem 1.1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  transition: box-shadow 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.person:hover { box-shadow: var(--shadow-md); border-color: var(--border-medium); transform: translateY(-1px); }
.person__avatar { width: 96px; height: 96px; border-radius: 50%; object-fit: cover; border: 1px solid var(--border-subtle); margin-bottom: 0.8rem; }
.person__avatar--initials { display: grid; place-items: center; background: var(--accent-light); color: var(--accent); font-family: var(--font-display); font-weight: 600; font-size: 2rem; }
.person__name { font-weight: 600; font-size: 0.98rem; }
.person__role { font-size: 0.82rem; color: var(--text-muted); }
.person__year { display: inline-block; margin-top: 0.4rem; font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--accent); background: var(--accent-light); padding: 0.15rem 0.5rem; border-radius: 9999px; }
.person__links { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.4rem 0.7rem; margin-top: 0.7rem; }
.person__links a { font-size: 0.78rem; font-weight: 500; }

/* ============================================================
   PUBLICATIONS — filter bar + ledger
   ============================================================ */
.pubs { max-width: var(--reading-width); margin: 0 auto; }

.filterbar {
  position: sticky;
  top: var(--header-h);
  z-index: 60;
  background: color-mix(in srgb, var(--bg-primary) 90%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 0.9rem 0;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-subtle);
}
.filterbar__search { display: flex; align-items: center; gap: 0.5rem; padding: 0.55rem 0.8rem; background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: 9999px; }
.filterbar__search:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-light); }
.filterbar__search input { flex: 1; border: none; outline: none; background: none; font-family: var(--font-body); font-size: 0.9rem; color: var(--text-primary); }
.filterbar__search svg { color: var(--text-muted); flex-shrink: 0; }

.filterbar__facets { margin-top: 0.7rem; display: flex; flex-direction: column; gap: 0.5rem; }
.facet-row { display: flex; align-items: baseline; gap: 0.6rem; flex-wrap: wrap; }
.facet-row__label { font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-muted); width: 3.4rem; flex-shrink: 0; }
.facet-row__pills { display: flex; flex-wrap: wrap; gap: 0.35rem; }

.pill {
  padding: 0.28rem 0.7rem;
  font-size: 0.78rem;
  font-weight: 500;
  font-family: var(--font-body);
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: 9999px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.pill:hover { color: var(--accent); border-color: var(--accent); background: var(--accent-light); }
.pill[aria-pressed="true"] { color: var(--text-inverse); background: var(--text-primary); border-color: var(--text-primary); }

.filterbar__meta { display: flex; align-items: center; justify-content: space-between; margin-top: 0.7rem; }
.filterbar__count { font-size: 0.8rem; color: var(--text-muted); }
.filterbar__count strong { color: var(--text-primary); }
.filterbar__clear { font-size: 0.8rem; font-weight: 500; color: var(--accent); background: none; border: none; cursor: pointer; }
.filterbar__clear[hidden] { display: none; }

.pubs__empty { padding: 3rem 1rem; text-align: center; color: var(--text-muted); }
.pubs__empty[hidden] { display: none; }

/* Ledger rows (ported from reference) */
.paper-list { margin-top: 0.5rem; }
.paper {
  display: grid;
  grid-template-columns: 120px 1fr;
  grid-template-rows: auto auto;
  column-gap: 1.75rem;
  row-gap: 1rem;
  padding: 1.75rem 0;
  border-top: 1px solid var(--border-subtle);
  scroll-margin-top: calc(var(--header-h) + 5rem);
  transition: opacity 0.3s ease, max-height 0.4s ease, padding 0.3s ease;
  max-height: 1200px;
  overflow: hidden;
}
.paper:last-child { border-bottom: 1px solid var(--border-subtle); }
.paper--hidden { opacity: 0; max-height: 0; padding-top: 0; padding-bottom: 0; border-color: transparent; pointer-events: none; }

.paper__meta { grid-column: 1; grid-row: 1; display: flex; flex-direction: column; gap: 0.85rem; padding-top: 0.25rem; font-family: var(--font-mono); }
.paper__thumb { grid-column: 1; grid-row: 2; width: 100%; align-self: start; border-radius: var(--radius-sm); overflow: hidden; }
.paper__thumb img { display: block; width: 100%; }
.paper__text { grid-column: 2; grid-row: 1 / span 2; min-width: 0; }

.paper__venue { display: flex; flex-direction: column; gap: 0.1rem; line-height: 1.25; }
.paper__venue + .paper__venue { padding-top: 0.7rem; border-top: 1px dashed var(--border-subtle); }
.paper__venue-acronym { color: var(--text-primary); font-weight: 700; font-size: 0.95rem; letter-spacing: 0.02em; }
.paper__year { color: var(--text-muted); font-size: 0.76rem; letter-spacing: 0.04em; }
.paper__venue-kind { color: var(--text-muted); font-family: var(--font-body); font-size: 0.72rem; margin-top: 0.15rem; }

.paper__badges { display: flex; flex-wrap: wrap; gap: 0.3rem; margin-top: 0.35rem; }
.paper__badge { font-family: var(--font-body); font-size: 0.66rem; font-weight: 600; line-height: 1; padding: 0.25rem 0.45rem; border-radius: 4px; background: var(--bg-secondary); color: var(--text-secondary); border: 1px solid var(--border-subtle); white-space: nowrap; }
.paper__badge--highlight { background: transparent; color: var(--highlight); border-color: var(--highlight); }
.paper__badge--accent { background: var(--accent-light); color: var(--accent); border-color: transparent; }

.paper__title { font-size: 1.05rem; font-weight: 600; line-height: 1.4; letter-spacing: -0.01em; color: var(--text-primary); margin-bottom: 0.35rem; }
.paper--featured .paper__title { font-size: 1.18rem; }
.paper__authors { font-size: 0.86rem; color: var(--text-secondary); line-height: 1.55; margin-bottom: 0.55rem; }
.paper__authors .is-member { color: var(--text-primary); font-weight: 600; }
.paper__authors a.is-member { text-decoration: underline; text-decoration-color: var(--border-medium); text-underline-offset: 2px; }
.paper__authors a.is-member:hover { color: var(--accent); text-decoration-color: var(--accent); }
.paper__desc { font-size: 0.9rem; color: var(--text-muted); line-height: 1.65; margin-bottom: 0.7rem; }
.paper__desc p { margin-bottom: 0.5rem; }

.paper__actions { display: flex; flex-wrap: wrap; align-items: center; gap: 0 0.55rem; font-size: 0.83rem; }
.paper__actions a, .paper__actions button { color: var(--accent); font-weight: 500; background: none; border: none; padding: 0; font-family: inherit; font-size: inherit; cursor: pointer; }
.paper__actions a:hover, .paper__actions button:hover { color: var(--accent-hover); }
.paper__actions > * + *::before { content: "·"; color: var(--text-muted); margin-right: 0.55rem; pointer-events: none; }

.paper__tags { display: flex; flex-wrap: wrap; gap: 0.3rem; margin-top: 0.7rem; }
.paper__tag {
  font-size: 0.68rem; font-weight: 600; letter-spacing: 0.02em;
  padding: 0.18rem 0.55rem; border-radius: 4px;
  background: var(--bg-secondary); color: var(--text-muted);
  border: 1px solid var(--border-subtle); cursor: pointer;
}
.paper__tag:hover { color: var(--accent); border-color: var(--accent); }

.paper__bibtex { margin-top: 0.7rem; font-family: var(--font-mono); font-size: 0.74rem; line-height: 1.55; color: var(--text-secondary); background: var(--bg-secondary); border: 1px solid var(--border-subtle); border-radius: var(--radius-sm); padding: 0.8rem 0.95rem; white-space: pre-wrap; overflow-x: auto; }
.paper__bibtex[hidden] { display: none; }

/* BibTeX copy toast */
.bibtex-toast {
  position: fixed; right: 1.25rem; bottom: 1.25rem; z-index: 400;
  width: min(440px, calc(100vw - 2.5rem));
  max-height: min(60vh, 480px);
  display: flex; flex-direction: column;
  background: var(--bg-elevated); color: var(--text-primary);
  border: 1px solid var(--border-subtle); border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  opacity: 0; transform: translateY(8px); pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  overflow: hidden;
}
.bibtex-toast--visible { opacity: 1; transform: none; pointer-events: auto; }
.bibtex-toast__header { display: flex; align-items: center; justify-content: space-between; gap: 0.75rem; padding: 0.65rem 0.85rem; border-bottom: 1px solid var(--border-subtle); background: var(--bg-secondary); }
.bibtex-toast__title { display: inline-flex; align-items: center; gap: 0.45rem; font-size: 0.82rem; font-weight: 600; }
.bibtex-toast__check { color: var(--accent); }
.bibtex-toast__close { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 1.05rem; line-height: 1; }
.bibtex-toast__close:hover { color: var(--text-primary); }
.bibtex-toast__body { margin: 0; padding: 0.8rem 0.95rem; font-family: var(--font-mono); font-size: 0.74rem; line-height: 1.55; color: var(--text-secondary); white-space: pre; overflow: auto; flex: 1; tab-size: 2; }

/* ============================================================
   RESEARCH + RESOURCES content blocks
   ============================================================ */
.prose { max-width: var(--reading-width); }
.prose h2 { font-family: var(--font-display); font-size: 1.5rem; font-weight: 600; letter-spacing: -0.02em; margin: 2.2rem 0 0.8rem; scroll-margin-top: calc(var(--header-h) + 1rem); }
.prose h3 { font-size: 1.05rem; margin: 1.4rem 0 0.5rem; }
.prose p { color: var(--text-secondary); margin-bottom: 1rem; }
.prose ul { color: var(--text-secondary); margin: 0 0 1rem 1.2rem; }
.prose li { margin-bottom: 0.4rem; }

.theme-section { padding: 1.8rem 0; border-top: 1px solid var(--border-subtle); scroll-margin-top: calc(var(--header-h) + 1rem); }
.theme-section__title { font-family: var(--font-display); font-size: 1.5rem; font-weight: 600; letter-spacing: -0.02em; }
.theme-section__blurb { color: var(--text-secondary); margin: 0.4rem 0 1rem; max-width: 60ch; }

.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 1rem; }
.res-card { display: block; padding: 1.2rem; background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: var(--radius); }
.res-card:hover { box-shadow: var(--shadow-sm); border-color: var(--border-medium); transform: translateY(-1px); }
.res-card__title { font-weight: 600; color: var(--text-primary); margin-bottom: 0.3rem; }
.res-card__text { font-size: 0.86rem; color: var(--text-muted); }

/* ============================================================
   404
   ============================================================ */
.notfound { max-width: var(--reading-width); padding: 3rem 0 2rem; }
.notfound__path { margin-top: 0.6rem; color: var(--text-secondary); }
.notfound__path code { font-family: var(--font-mono); font-size: 0.85em; background: var(--bg-secondary); padding: 0.1rem 0.4rem; border-radius: 4px; border: 1px solid var(--border-subtle); }
.notfound__suggest { margin-top: 1.4rem; padding: 1rem 1.2rem; background: var(--bg-card); border: 1px solid var(--border-subtle); border-left: 3px solid var(--accent); border-radius: var(--radius); }
.notfound__suggest-label { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 0.5rem; }
.notfound__suggest-list { list-style: none; display: flex; flex-direction: column; gap: 0.3rem; }
.notfound__suggest-list a { font-weight: 500; }
.notfound__links { display: flex; flex-wrap: wrap; gap: 0.4rem 1.1rem; margin-top: 1.8rem; padding-top: 1.2rem; border-top: 1px solid var(--border-subtle); }
.notfound__links a { font-size: 0.9rem; color: var(--text-secondary); }
.notfound__links a:hover { color: var(--accent); }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer { margin-top: 3rem; border-top: 1px solid var(--border-subtle); background: var(--bg-secondary); }
.site-footer__inner { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 2rem; padding-top: 2.5rem; padding-bottom: 1.5rem; }
.site-footer__name { font-family: var(--font-display); font-size: 1.2rem; font-weight: 700; letter-spacing: -0.02em; }
.site-footer__tagline { color: var(--text-secondary); margin-top: 0.3rem; max-width: 32ch; }
.site-footer__inst { font-size: 0.82rem; color: var(--text-muted); margin-top: 0.5rem; }
.site-footer__heading { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 0.7rem; }
.site-footer__nav ul, .site-footer__social { list-style: none; display: flex; flex-direction: column; gap: 0.4rem; }
.site-footer__nav a, .site-footer__social a { font-size: 0.9rem; color: var(--text-secondary); }
.site-footer__nav a:hover, .site-footer__social a:hover { color: var(--accent); }
.site-footer__legal { font-size: 0.78rem; color: var(--text-muted); padding-bottom: 2rem; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .nav { display: none; }
  .nav-burger { display: inline-flex; }
  .icon-btn#search-open .icon-btn__kbd { display: none; }
  .hero__inner { grid-template-columns: 1fr; }
  .hero__art { display: none; }
  .site-footer__inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  body { font-size: 14.8px; }
  .paper { grid-template-columns: 1fr; grid-template-rows: auto; row-gap: 0.6rem; padding: 1.4rem 0; }
  .paper__meta { grid-column: 1; grid-row: auto; flex-direction: row; flex-wrap: wrap; gap: 0.5rem 0.8rem; align-items: center; padding-top: 0; }
  .paper__thumb { grid-column: 1; grid-row: auto; max-width: 140px; }
  .paper__text { grid-column: 1; grid-row: auto; }
  .paper__venue { flex-direction: row; align-items: baseline; gap: 0.35rem; }
  .paper__venue + .paper__venue { padding-top: 0; border-top: none; padding-left: 0.7rem; border-left: 1px dashed var(--border-subtle); }
  .paper__badges { margin-top: 0; }
  .site-footer__inner { grid-template-columns: 1fr; }
  .facet-row { flex-direction: column; gap: 0.3rem; }
  .facet-row__label { width: auto; }
}