/* ============================================================
   mrmanna.github.io — site.css
   Design language: Editorial Mono.
   Confident, monochromatic, evidence-led. Type-driven hierarchy.
   ============================================================ */

/* ── Tokens ────────────────────────────────────────────────── */
:root {
  color-scheme: light;

  /* Color — pure monochrome with graded inks */
  --paper:        #ffffff;
  --surface:      #fafafa;
  --surface-2:    #f4f4f4;
  --ink:          #0a0a0a;
  --ink-2:        #2a2a2a;
  --ink-secondary:#525252;
  --ink-muted:    #737373;
  --rule:         #e5e5e5;
  --rule-strong:  #c4c4c4;
  --focus:        #0a0a0a;

  /* Type */
  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-sans:    "Inter", "Helvetica Neue", system-ui, -apple-system, sans-serif;
  --font-mono:    "JetBrains Mono", Menlo, Consolas, monospace;

  /* Geometry */
  --r-sm:  4px;
  --r-md:  8px;
  --r-lg:  14px;
  --r-pill: 999px;
  --gap:   1.5rem;
  --wrap:  64rem;

  /* Motion */
  --ease: cubic-bezier(0.2, 0, 0, 1);
  --t-fast: 120ms;
  --t-med:  180ms;
}

/* ── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 1.0625rem;          /* 17px */
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper);
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; height: auto; }
ul, ol { padding-left: 1.25em; }
ul li + li, ol li + li { margin-top: 0.3rem; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--ink);
  text-wrap: balance;
}

a {
  color: var(--ink);
  text-decoration: none;
  background-image: linear-gradient(to right, currentColor, currentColor);
  background-size: 100% 1px;
  background-repeat: no-repeat;
  background-position: 0 100%;
  transition: color var(--t-fast) var(--ease), opacity var(--t-fast) var(--ease);
}
a:hover { opacity: 0.62; }

::selection { background: var(--ink); color: var(--paper); }

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

/* ── Skip link ─────────────────────────────────────────────── */
.skip {
  position: absolute; top: -100%; left: 1rem;
  background: var(--ink); color: var(--paper);
  padding: 0.5rem 0.9rem; border-radius: var(--r-sm);
  font-size: 0.85rem; z-index: 200; background-image: none;
}
.skip:focus { top: 0.5rem; opacity: 1; }

/* ── Layout wrap ───────────────────────────────────────────── */
.wrap {
  width: min(100%, var(--wrap));
  margin-inline: auto;
  padding-inline: 1.5rem;
}

/* ── Eyebrow / meta labels ─────────────────────────────────── */
.eyebrow,
.section-num,
.feed-meta,
.kind,
.repo-kind,
.col-head,
.glossary-group,
.repo-group-head,
.works.papers .group-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  font-weight: 500;
}

/* ── Top bar ───────────────────────────────────────────────── */
.topbar {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--rule);
}
.topbar-inner {
  display: flex; align-items: center; gap: 1.25rem;
  padding-block: 0.85rem;
}
.brand {
  display: flex; flex-direction: column; line-height: 1.1;
  flex-shrink: 0; background-image: none;
}
.brand-name {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.02rem;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.brand-role {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-top: 2px;
}
.nav {
  display: flex; flex-wrap: wrap; gap: 0 1.4rem;
  margin-left: auto;
  font-size: 0.86rem;
}
.nav a {
  color: var(--ink-secondary);
  background-image: none;
  position: relative;
  padding-block: 0.25rem;
}
.nav a::after {
  content: ""; position: absolute;
  left: 0; right: 100%; bottom: 0;
  border-bottom: 1px solid var(--ink);
  transition: right var(--t-med) var(--ease);
}
.nav a:hover { color: var(--ink); opacity: 1; }
.nav a:hover::after { right: 0; }

.nav-toggle {
  display: none; margin-left: auto;
  background: none; border: 1px solid var(--rule);
  border-radius: var(--r-pill);
  padding: 0.35rem 0.85rem; font-family: var(--font-mono);
  font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--ink-secondary); cursor: pointer;
  transition: border-color var(--t-fast), color var(--t-fast);
}
.nav-toggle:hover { border-color: var(--ink); color: var(--ink); }

/* ── Theme toggle ──────────────────────────────────────────── */
.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; padding: 0;
  background: none;
  border: 1px solid var(--rule);
  border-radius: var(--r-pill);
  color: var(--ink-secondary);
  cursor: pointer; flex-shrink: 0;
  transition: border-color var(--t-fast), color var(--t-fast);
}
.theme-toggle:hover { border-color: var(--ink); color: var(--ink); }
.icon-moon { display: block; }
.icon-sun  { display: none; }
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="dark"] .icon-sun  { display: block; }

/* ── Hero / Intro ──────────────────────────────────────────── */
.intro { padding-block: 5rem 4rem; }
.intro-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 3rem;
  align-items: start;
}
.intro-text { min-width: 0; }

.eyebrow { margin-bottom: 1.25rem; }

.intro h1 {
  font-size: clamp(2.5rem, 5.5vw, 4.25rem);
  font-weight: 400;
  letter-spacing: -0.025em;
  line-height: 1.02;
  margin-bottom: 1.5rem;
}

.lede {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.2rem, 1.8vw, 1.4rem);
  line-height: 1.45;
  letter-spacing: -0.005em;
  color: var(--ink-2);
  max-width: 36em;
  margin-bottom: 1.25rem;
}
.sub {
  color: var(--ink-secondary);
  font-size: 1rem;
  max-width: 42em;
  margin-bottom: 2rem;
}
.sub a { color: var(--ink); }

.quick-links {
  display: flex; flex-wrap: wrap;
  gap: 0.4rem 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.quick-links a {
  color: var(--ink-secondary);
  background-image: none;
  border: 1px solid var(--rule);
  border-radius: var(--r-pill);
  padding: 0.35rem 0.8rem;
  transition: border-color var(--t-fast), color var(--t-fast);
}
.quick-links a:hover {
  color: var(--ink); border-color: var(--ink); opacity: 1;
}

.intro-photo { flex-shrink: 0; width: 168px; }
.intro-photo img {
  width: 168px; height: 168px;
  border-radius: var(--r-md);
  object-fit: cover;
  object-position: center top;
  box-shadow:
    0 0 0 1px var(--rule),
    0 1px 2px rgba(0,0,0,0.04),
    0 12px 32px -12px rgba(0,0,0,0.18);
}
.photo-credit {
  margin-top: 0.3rem;
  font-size: 0.62rem;
  color: #c4c4c4;
  text-align: center;
  letter-spacing: 0.02em;
}

/* ── Start-here aside ──────────────────────────────────────── */
.start-here {
  margin-top: 2.5rem;
  padding: 0 0 0 1.5rem;
  border-left: 2px solid var(--ink);
  background: transparent;
}
.start-here-head {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 0.7rem;
  font-weight: 500;
}
.start-here ul {
  list-style: none; padding: 0;
  display: grid; gap: 0.55rem;
  font-size: 0.95rem;
  color: var(--ink-secondary);
}
.start-here strong { color: var(--ink); margin-right: 0.25rem; font-weight: 600; }
.start-here a { color: var(--ink); }

/* ── Section bands ─────────────────────────────────────────── */
.band {
  padding-block: 5rem;
  border-top: 1px solid var(--rule);
}
.band.alt { background: var(--surface); }

.band-head {
  margin-bottom: 3rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--rule);
}
.section-num { margin-bottom: 0.85rem; display: block; }

.band-head h2 {
  font-size: clamp(1.75rem, 3.2vw, 2.4rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  margin-bottom: 0.65rem;
  display: flex; align-items: baseline; gap: 0.5rem;
}
.band-head > p {
  color: var(--ink-secondary);
  font-size: 1rem;
  max-width: 44em;
}
.band-head > p a { color: var(--ink); }

/* ── Permalink anchors ─────────────────────────────────────── */
.anchor {
  font-size: 0.85rem; color: var(--rule-strong);
  background-image: none;
  opacity: 0;
  transition: opacity var(--t-fast) var(--ease);
}
.band-head:hover .anchor,
.anchor:focus { opacity: 1; color: var(--ink); }

/* ── Now feed ──────────────────────────────────────────────── */
.feed { list-style: none; padding: 0; display: grid; gap: 0; }
.feed > li {
  padding-block: 2.25rem;
  border-bottom: 1px solid var(--rule);
}
.feed > li:first-child { padding-top: 0; }
.feed > li:last-child { border-bottom: none; }

.feed-meta { margin-bottom: 0.65rem; }

.feed h3 {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2vw, 1.65rem);
  font-weight: 400;
  letter-spacing: -0.015em;
  line-height: 1.2;
  margin-bottom: 0.7rem;
}
.feed h3 a {
  color: var(--ink);
  background-image: linear-gradient(to right, var(--ink), var(--ink));
  background-size: 0% 1px;
  background-position: 0 100%;
  transition: background-size var(--t-med) var(--ease);
}
.feed h3 a:hover {
  opacity: 1;
  background-size: 100% 1px;
}

.feed p {
  color: var(--ink-secondary);
  font-size: 1rem;
  max-width: 50em;
}
.row {
  display: flex; flex-wrap: wrap;
  gap: 0.4rem 0.6rem;
  margin-top: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.row a {
  color: var(--ink-secondary);
  background-image: none;
  border-bottom: 1px solid var(--rule-strong);
  padding-bottom: 1px;
}
.row a:hover { color: var(--ink); border-bottom-color: var(--ink); opacity: 1; }

.more {
  margin-top: 2rem;
  font-size: 0.92rem;
  color: var(--ink-muted);
}
.more a { color: var(--ink); }

/* ── Venue tags ────────────────────────────────────────────── */
.venue {
  display: inline-block;
  margin-left: 0.4rem;
  padding: 0.05rem 0.45rem;
  border: 1px solid var(--rule);
  color: var(--ink-muted);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 500;
  border-radius: var(--r-pill);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  vertical-align: 2px;
  background: var(--paper);
}

/* ── Method cards ──────────────────────────────────────────── */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 1.25rem;
}
.card {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  padding: 1.5rem 1.4rem;
  display: grid; gap: 0.65rem; align-content: start;
  transition: border-color var(--t-med) var(--ease),
              transform var(--t-med) var(--ease),
              box-shadow var(--t-med) var(--ease);
}
.card:hover {
  border-color: var(--ink);
  transform: translateY(-2px);
  box-shadow: 0 16px 40px -24px rgba(0,0,0,0.18);
}
.card h3 {
  font-family: var(--font-display);
  font-size: 1.18rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--ink);
}
.kind { display: block; }
.card > p {
  font-size: 0.94rem;
  color: var(--ink-secondary);
  line-height: 1.6;
}
.boundary {
  font-size: 0.85rem;
  background: var(--surface);
  border-left: 2px solid var(--ink);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  padding: 0.65rem 0.85rem;
  color: var(--ink-secondary);
  margin-top: 0.25rem;
}
.boundary strong {
  color: var(--ink);
  font-weight: 600;
  display: block;
  margin-bottom: 0.15rem;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-family: var(--font-mono);
}
.card .row { margin-top: 0.4rem; }

/* ── Books & papers two-column ─────────────────────────────── */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem 4rem;
  align-items: start;
}
.col-head {
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--ink);
  display: block;
}

/* Books list */
.works { list-style: none; padding: 0; display: grid; gap: 1.75rem; }
.works.books > li {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 1.25rem;
  align-items: start;
}
.cover {
  display: block;
  border-radius: 3px;
  overflow: hidden;
  background-image: none;
  box-shadow:
    0 0 0 1px rgba(0,0,0,0.06),
    0 4px 12px -4px rgba(0,0,0,0.18),
    0 12px 32px -8px rgba(0,0,0,0.16);
  transition: transform var(--t-med) var(--ease), box-shadow var(--t-med) var(--ease);
  line-height: 0;
}
.cover:hover {
  transform: translateY(-3px);
  box-shadow:
    0 0 0 1px rgba(0,0,0,0.08),
    0 8px 22px -4px rgba(0,0,0,0.24),
    0 22px 48px -10px rgba(0,0,0,0.22);
  opacity: 1;
}
.cover img { width: 96px; height: 144px; object-fit: cover; }
.book-info { display: grid; gap: 0.4rem; min-width: 0; }
.book-info > strong {
  font-family: var(--font-display);
  display: block;
  font-size: 1.08rem;
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -0.01em;
}
.book-info > strong a { color: var(--ink); }
.dim {
  font-size: 0.88rem;
  color: var(--ink-secondary);
  line-height: 1.55;
}
.dim a { color: var(--ink); border-bottom: 1px solid var(--rule-strong); }
.dim a:hover { border-bottom-color: var(--ink); opacity: 1; }

.book-rating {
  display: inline-flex; align-items: center; gap: 0.4rem;
  margin-top: 0.2rem;
  padding: 0.15rem 0.55rem;
  border: 1px solid var(--rule);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--ink-secondary);
}
.stars { color: var(--ink); font-size: 0.78rem; letter-spacing: 0; }

/* Papers list (collapsible) */
.works:not(.books) > li {
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--rule);
}
.works:not(.books) > li:last-child { border-bottom: none; padding-bottom: 0; }
.works:not(.books) strong {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 500;
  letter-spacing: -0.005em;
}
.works:not(.books) strong a { color: var(--ink); }

.works.papers > li { gap: 0; }
.works.papers details { display: block; width: 100%; }
.works.papers summary {
  cursor: pointer; list-style: none;
  display: flex; flex-wrap: wrap; align-items: baseline;
  gap: 0.25rem 0.6rem;
  padding-block: 0.15rem;
  user-select: none;
}
.works.papers summary::-webkit-details-marker,
.works.papers summary::marker { display: none; }
.works.papers summary strong { flex: 1; min-width: 0; }
.works.papers summary::after {
  content: '+';
  font-family: var(--font-mono);
  font-size: 1.1rem;
  line-height: 1;
  color: var(--ink-muted);
  flex-shrink: 0;
  margin-left: 0.5rem;
  align-self: center;
  transition: transform var(--t-med) var(--ease), color var(--t-fast);
}
.works.papers summary:hover::after { color: var(--ink); }
.works.papers details[open] > summary::after { content: '−'; color: var(--ink); }
.works.papers details[open] > summary { margin-bottom: 0.6rem; }

.paper-abstract {
  font-size: 0.92rem;
  color: var(--ink-secondary);
  line-height: 1.65;
  padding: 0.4rem 0 0.2rem 1.1rem;
  border-left: 2px solid var(--rule);
  margin-top: 0.35rem;
}
.paper-abstract a { color: var(--ink); border-bottom: 1px solid var(--rule-strong); }
.paper-abstract a:hover { border-bottom-color: var(--ink); opacity: 1; }

.works.papers .group-label {
  border: none;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 0.5rem;
  margin-top: 1rem;
}
.works.papers .group-label:first-child { margin-top: 0; }

/* ── Code / repo cards ─────────────────────────────────────── */
.repo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
  gap: 1.25rem;
  list-style: none; padding: 0;
}
.repo-group-head {
  grid-column: 1 / -1;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--ink);
  margin-top: 1.25rem;
}
.repo-group-head:first-child { margin-top: 0; }

.repo-card {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  padding: 1.4rem 1.4rem;
  display: grid; gap: 0.85rem; align-content: start;
  min-width: 0; overflow: hidden;
  transition: border-color var(--t-med) var(--ease),
              transform var(--t-med) var(--ease),
              box-shadow var(--t-med) var(--ease);
}
.repo-card:hover {
  border-color: var(--ink);
  transform: translateY(-2px);
  box-shadow: 0 16px 40px -24px rgba(0,0,0,0.18);
}
.repo-card-head { display: flex; align-items: flex-start; gap: 0.85rem; }

.repo-icon {
  flex-shrink: 0;
  width: 38px; height: 38px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  color: var(--ink);
  transition: background var(--t-fast), border-color var(--t-fast);
}
.repo-card:hover .repo-icon { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.repo-icon svg { display: block; }

.repo-name {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--ink);
  background-image: none;
  line-height: 1.3;
  word-break: break-all;
  letter-spacing: -0.005em;
}
.repo-name:hover { opacity: 0.62; }
.repo-kind { line-height: 1.4; margin-top: 0.25rem; display: block; }
.repo-desc {
  font-size: 0.92rem;
  color: var(--ink-secondary);
  line-height: 1.6;
}
.repo-foot {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: 0.4rem 0.65rem;
  padding-top: 0.7rem;
  border-top: 1px solid var(--rule);
  margin-top: 0.1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.repo-foot a {
  color: var(--ink-secondary);
  background-image: none;
  border-bottom: 1px solid var(--rule-strong);
}
.repo-foot a:hover { color: var(--ink); border-bottom-color: var(--ink); opacity: 1; }
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  padding: 0.1rem 0.55rem;
  border: 1px solid var(--rule);
  color: var(--ink-secondary);
  border-radius: var(--r-pill);
  background: var(--paper);
  text-transform: uppercase;
}

/* ── Writing topics ────────────────────────────────────────── */
.topics {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 2.25rem 2.5rem;
}
.topics article h3 {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 0.85rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--ink);
}
.topics ul { list-style: none; padding: 0; display: grid; gap: 0.5rem; }
.topics li { font-size: 0.95rem; line-height: 1.45; }
.topics a { color: var(--ink); }
.topics a:hover { opacity: 0.62; }

/* ── Arc timeline ──────────────────────────────────────────── */
.arc { list-style: none; padding: 0; position: relative; }
.arc > li {
  position: relative;
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: 0.75rem 2.5rem;
  padding: 1.75rem 0 1.75rem 1.5rem;
  border-bottom: 1px solid var(--rule);
  align-items: start;
}
.arc > li:first-child { padding-top: 0.5rem; }
.arc > li:last-child { border-bottom: none; }
.arc > li::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  border-left: 1px solid var(--rule);
}
.arc > li::after {
  content: "";
  position: absolute;
  left: -3px; top: 1.95rem;
  width: 7px; height: 7px;
  background: var(--paper);
  border: 1px solid var(--ink);
  border-radius: 50%;
}
.arc > li:first-child::after { top: 0.65rem; }

.period {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--ink-muted);
  padding-top: 0.2rem;
  white-space: nowrap;
}
.arc strong {
  display: block;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.18rem;
  letter-spacing: -0.01em;
  margin-bottom: 0.35rem;
}
.arc p {
  font-size: 0.92rem;
  color: var(--ink-secondary);
  margin: 0;
  line-height: 1.6;
}
.arc-note {
  margin-top: 2rem;
  color: var(--ink-muted);
  font-size: 0.9rem;
  font-style: italic;
  max-width: 44em;
}

/* Arc chips */
.arc-chips, .arc-co-chips {
  display: flex; flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0.55rem 0 1rem;
}
.arc-co-chips { margin: 0 0 0.45rem; }
.arc-chip {
  display: inline-flex; align-items: center;
  padding: 0.15rem 0.65rem;
  border: 1px solid var(--rule);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--ink-secondary);
  white-space: nowrap;
  line-height: 1.6;
  background: var(--paper);
}
.arc-chip.ac {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
  font-weight: 500;
}

.arc-companies {
  list-style: none; padding: 0;
  display: flex; flex-direction: column;
  gap: 1.35rem;
  margin-top: 0.25rem;
}
.arc-company {
  padding-left: 1.1rem;
  border-left: 1px solid var(--rule);
  transition: border-left-color var(--t-med) var(--ease);
}
.arc-company:hover { border-left-color: var(--ink); }
.arc-co-head {
  display: flex; flex-wrap: wrap; align-items: baseline;
  gap: 0.25rem 0.75rem; margin-bottom: 0.35rem;
}
.arc-co-name {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1rem;
  letter-spacing: -0.005em;
  color: var(--ink);
}
.arc-co-role {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--ink-muted);
}
.arc .arc-co-desc {
  font-size: 0.9rem;
  color: var(--ink-secondary);
  margin: 0;
  line-height: 1.6;
}
.arc .arc-co-desc strong { font-family: inherit; font-size: inherit; display: inline; color: var(--ink); }

/* ── Glossary ──────────────────────────────────────────────── */
.glossary {
  display: grid;
  grid-template-columns: minmax(180px, 240px) 1fr;
  column-gap: 3rem;
}
.glossary dt, .glossary dd {
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--rule);
}
.glossary dt {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1rem;
  letter-spacing: -0.005em;
  color: var(--ink);
  padding-right: 1rem;
}
.glossary dd {
  margin: 0;
  font-size: 0.93rem;
  color: var(--ink-secondary);
  line-height: 1.6;
}
.glossary dd a { color: var(--ink); border-bottom: 1px solid var(--rule-strong); }
.glossary dd a:hover { border-bottom-color: var(--ink); opacity: 1; }

.glossary-group {
  grid-column: 1 / -1;
  padding: 1.75rem 0 0.6rem;
  border-bottom: 1px solid var(--ink);
  margin-top: 0;
}
.glossary-group:first-child { padding-top: 0.5rem; }

/* ── Connect links ─────────────────────────────────────────── */
.links {
  list-style: none; padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0 2.5rem;
}
.links li {
  font-size: 0.97rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--rule);
  display: flex; align-items: baseline; gap: 0.5rem;
}
.links li::before {
  content: "→";
  font-family: var(--font-mono);
  color: var(--ink-muted);
  font-size: 0.85rem;
  flex-shrink: 0;
}
.links a { color: var(--ink); font-weight: 500; }
.links a:hover { opacity: 0.62; }

/* ── Footer ────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--rule);
  padding-block: 2rem;
  background: var(--paper);
}
.footer-inner {
  display: flex; flex-wrap: wrap;
  gap: 0.5rem 2rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
  align-items: center;
  text-transform: uppercase;
}
.footer-inner a { color: var(--ink-secondary); border-bottom: 1px solid var(--rule); }
.footer-inner a:hover { color: var(--ink); border-bottom-color: var(--ink); opacity: 1; }
.print-btn {
  all: unset;
  cursor: pointer;
  color: var(--ink-secondary);
  border-bottom: 1px solid var(--rule);
  font: inherit;
  letter-spacing: inherit;
  text-transform: inherit;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.print-btn:hover { color: var(--ink); border-bottom-color: var(--ink); }

/* ── Demos & talks (homepage) ──────────────────────────────── */
.demos {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem 3rem;
}
.demo-group h3 {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 1rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--ink);
}
.demo-list { list-style: none; padding: 0; display: grid; gap: 0; }
.demo-list > li {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.4rem 1rem;
  align-items: baseline;
  padding-block: 0.85rem;
  border-bottom: 1px solid var(--rule);
}
.demo-list > li:last-child { border-bottom: none; }
.demo-list a {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  color: var(--ink);
  background-image: none;
  line-height: 1.35;
}
.demo-list a:hover { opacity: 0.62; }
.demo-list .demo-dur {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--ink-muted);
  white-space: nowrap;
}
.demo-list .demo-note {
  grid-column: 1 / -1;
  font-size: 0.88rem;
  color: var(--ink-secondary);
  line-height: 1.55;
  margin-top: 0.1rem;
}

/* ── Verse / Lyric Notebook page ───────────────────────────── */
.page-verse :lang(bn),
.page-verse [lang="bn"] {
  font-family: "Noto Serif Bengali", var(--font-display);
  font-weight: 500;
  letter-spacing: 0;
}

/* Hero */
.verse-hero {
  padding-block: 6rem 4rem;
  max-width: 50rem;
}
.verse-hero h1 {
  font-size: clamp(3.5rem, 9vw, 6.5rem);
  font-weight: 300;
  letter-spacing: -0.04em;
  line-height: 0.95;
  margin-bottom: 2rem;
}
.verse-epigraph {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  font-size: clamp(1.4rem, 2.4vw, 1.85rem);
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--ink);
  padding-left: 1.25rem;
  border-left: 2px solid var(--ink);
  margin-bottom: 2rem;
  max-width: 38em;
}
.verse-lede {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.15rem, 1.6vw, 1.3rem);
  line-height: 1.5;
  color: var(--ink-2);
  margin-bottom: 1.1rem;
  max-width: 36em;
}
.verse-sub {
  color: var(--ink-secondary);
  font-size: 1rem;
  max-width: 40em;
  margin-bottom: 1.75rem;
}
.verse-meta {
  display: flex; flex-wrap: wrap;
  gap: 0.4rem 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.verse-meta a { color: var(--ink); border-bottom: 1px solid var(--rule-strong); background-image: none; }
.verse-meta a:hover { border-bottom-color: var(--ink); opacity: 1; }

/* Anchors */
.verse-band .band-head h2 {
  font-size: clamp(1.85rem, 3.2vw, 2.5rem);
  font-weight: 400;
}
.h2-trans {
  font-family: var(--font-display);
  font-weight: 300;
  font-style: italic;
  color: var(--ink-muted);
  font-size: 0.7em;
  letter-spacing: -0.005em;
  margin-left: 0.4rem;
}

.anchor-themes {
  display: grid;
  gap: 3rem;
}
.theme-block {
  display: grid;
  grid-template-columns: minmax(180px, 220px) 1fr;
  gap: 1.5rem 3rem;
  align-items: start;
}
.theme-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 0.5rem;
}
.theme-name {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2vw, 1.55rem);
  font-weight: 400;
  letter-spacing: -0.015em;
  line-height: 1.2;
  margin-bottom: 0.6rem;
}
.theme-desc {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  font-size: 1rem;
  color: var(--ink-secondary);
  line-height: 1.5;
}

.anchor-list { list-style: none; padding: 0; display: grid; gap: 0; }
.anchor-list > li {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem 1.5rem;
  align-items: start;
  padding-block: 1.4rem;
  border-bottom: 1px solid var(--rule);
}
.anchor-list > li:first-child { padding-top: 0; }
.anchor-list > li:last-child { border-bottom: none; padding-bottom: 0; }

.anchor-row { min-width: 0; }
.anchor-title {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 1.7vw, 1.3rem);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--ink);
  margin: 0;
}
.anchor-sub {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin: 0.3rem 0 0;
}
.anchor-sub em {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  color: var(--ink-secondary);
  font-size: 0.9rem;
  margin-right: 0.4rem;
}
.anchor-note {
  font-size: 0.92rem;
  color: var(--ink-secondary);
  line-height: 1.55;
  max-width: 42em;
  margin: 0.55rem 0 0;
}
.anchor-note em {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--ink-2);
}

.anchor-listen {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-secondary);
  background-image: none;
  border: 1px solid var(--rule);
  border-radius: var(--r-pill);
  padding: 0.4rem 0.85rem;
  white-space: nowrap;
  align-self: start;
  transition: border-color var(--t-fast), color var(--t-fast), background var(--t-fast);
}
.anchor-listen:hover {
  color: var(--paper);
  background: var(--ink);
  border-color: var(--ink);
  opacity: 1;
}

/* Track lists */
.track-list {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 0;
  counter-reset: track;
}
.track-list > li {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  gap: 0.5rem 1.25rem;
  align-items: baseline;
  padding-block: 0.85rem;
  border-bottom: 1px solid var(--rule);
  counter-increment: track;
}
.track-list > li:last-child { border-bottom: none; }
.track-list > li::before {
  content: counter(track, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--ink-muted);
  min-width: 2.25rem;
}
.track-title {
  font-family: var(--font-display);
  font-size: clamp(1.02rem, 1.4vw, 1.15rem);
  font-weight: 500;
  letter-spacing: -0.005em;
  line-height: 1.35;
  color: var(--ink);
}
.track-title em {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  color: var(--ink-secondary);
  font-size: 0.92em;
  margin-left: 0.3rem;
}
.track-dur {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--ink-muted);
  white-space: nowrap;
}
.track-link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-secondary);
  background-image: none;
  border-bottom: 1px solid var(--rule-strong);
  padding-bottom: 1px;
  white-space: nowrap;
}
.track-link:hover { color: var(--ink); border-bottom-color: var(--ink); opacity: 1; }

.verse-source .links li { font-family: var(--font-display); font-size: 1.02rem; }
.verse-source .links a { color: var(--ink); }

/* ── Verse / Demos responsive ──────────────────────────────── */
@media (max-width: 760px) {
  .verse-hero { padding-block: 3.5rem 2.5rem; }
  .verse-hero h1 { font-size: clamp(2.5rem, 12vw, 3.5rem); }
  .theme-block { grid-template-columns: 1fr; gap: 0.75rem 0; }
  .theme-block .theme-num,
  .theme-block .theme-name,
  .theme-block .theme-desc { max-width: 38em; }
  .anchor-list > li {
    grid-template-columns: 1fr;
    gap: 0.85rem;
  }
  .anchor-listen { justify-self: start; }
  .track-list > li {
    grid-template-columns: auto 1fr;
    row-gap: 0.25rem;
  }
  .track-list > li .track-dur { grid-column: 2; }
  .track-list > li .track-link { grid-column: 2; justify-self: start; }
}

/* ── Dark theme ────────────────────────────────────────────── */
[data-theme="dark"] {
  color-scheme: dark;
  --paper:        #0a0a0a;
  --surface:      #141414;
  --surface-2:    #1c1c1c;
  --ink:          #fafafa;
  --ink-2:        #e5e5e5;
  --ink-secondary:#b8b8b8;
  --ink-muted:    #8a8a8a;
  --rule:         #262626;
  --rule-strong:  #3a3a3a;
  --focus:        #fafafa;
}
[data-theme="dark"] .topbar {
  background: rgba(10, 10, 10, 0.78);
}
[data-theme="dark"] .intro-photo img {
  box-shadow:
    0 0 0 1px var(--rule),
    0 1px 2px rgba(0,0,0,0.4),
    0 12px 32px -12px rgba(0,0,0,0.6);
}
[data-theme="dark"] .cover {
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.04),
    0 4px 12px -4px rgba(0,0,0,0.5),
    0 12px 32px -8px rgba(0,0,0,0.6);
}
[data-theme="dark"] .cover:hover {
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.06),
    0 8px 22px -4px rgba(0,0,0,0.6),
    0 22px 48px -10px rgba(0,0,0,0.7);
}
[data-theme="dark"] .card:hover,
[data-theme="dark"] .repo-card:hover {
  box-shadow: 0 16px 40px -24px rgba(0,0,0,0.7);
}

/* ── Reduced motion ────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ── Print / Save as CV ─────────────────────────────────────── */
@page { margin: 1.8cm 2cm; size: A4; }

@media print {
  /* Token overrides */
  :root {
    --paper:#fff; --surface:#fff; --surface-2:#fff;
    --ink:#000; --ink-2:#000; --ink-secondary:#333; --ink-muted:#555;
    --rule:#bbb; --rule-strong:#888;
  }

  /* Base */
  html, body { background: #fff !important; color: #000; }
  body { font-size: 10pt; line-height: 1.45; }

  /* ── Hide: UI chrome + sections not useful on paper ── */
  .topbar, .nav-toggle, .theme-toggle, .skip, .print-btn,
  .start-here, .anchor, .venue,
  #demos, #writing, #glossary, #connect { display: none !important; }

  /* ── Bands ── */
  .band, .band.alt {
    padding-block: 1rem 0.5rem;
    background: #fff !important;
    box-shadow: none;
    border: none;
  }

  /* ── Intro — compact header block ── */
  .intro { padding-block: 0.4rem 0.7rem; }
  .intro-inner { display: block; }
  .intro-photo { display: none; }
  .intro-text h1 { font-size: 22pt; margin-bottom: 0.1rem; }
  .eyebrow { font-size: 8.5pt; letter-spacing: 0.06em; color: #444; margin-bottom: 0.15rem; }
  .lede { font-size: 10.5pt; margin-bottom: 0.35rem; }
  .sub  { font-size: 9pt; color: #333; margin-bottom: 0.35rem; }
  .quick-links { font-size: 8.5pt; gap: 0.6rem; }
  /* suppress URL expansion for profile quick-links */
  .quick-links a[href^="http"]::after { content: none !important; }

  /* ── Section headings ── */
  .band-head {
    margin-bottom: 0.7rem;
    padding-bottom: 0.4rem;
    border-bottom: 0.6pt solid #888;
    page-break-after: avoid;
  }
  .section-num { font-size: 7.5pt; letter-spacing: 0.12em; color: #666; }
  h2 { font-size: 14pt; page-break-after: avoid; }
  h3 { font-size: 10.5pt; page-break-after: avoid; }

  /* ── Page breaks ── */
  #books { page-break-before: always; }
  #arc   { page-break-before: always; }

  /* ── Now / feed ── */
  .feed { padding-left: 0; list-style: none; }
  .feed > li {
    page-break-inside: avoid;
    padding-block: 0.45rem;
    border-bottom: 0.4pt solid #ccc;
  }
  .feed-meta { font-size: 8pt; color: #555; }

  /* ── Methods cards ── */
  .two-col, .cards { display: block; gap: 0; }
  .card {
    page-break-inside: avoid;
    border: 0.5pt solid #bbb;
    box-shadow: none;
    margin-bottom: 0.5rem;
    padding: 0.45rem 0.65rem;
  }

  /* ── Books & papers ── */
  .topics { display: block; }
  .works.books > li {
    grid-template-columns: 46px 1fr;
    page-break-inside: avoid;
    margin-bottom: 0.5rem;
  }
  .cover img { width: 46px; height: auto; }
  /* always expand abstracts in print */
  details { open: true; }
  details summary { display: none; }
  details > * { display: block !important; }

  /* ── Code repos ── */
  .repo-grid { display: block; }
  .repo-card {
    page-break-inside: avoid;
    border: 0.5pt solid #bbb;
    box-shadow: none;
    margin-bottom: 0.5rem;
    padding: 0.45rem 0.65rem;
  }
  .repo-group-head { font-size: 7.5pt; letter-spacing: 0.1em; color: #666; margin-top: 0.7rem; }

  /* ── Arc / career timeline ── */
  .arc > li {
    page-break-inside: avoid;
    grid-template-columns: 6.5rem 1fr;
  }

  /* ── Links ── */
  a { color: #000; background-image: none; text-decoration: none; }
  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 7pt;
    color: #555;
    word-break: break-all;
    font-family: var(--font-mono);
  }
  /* suppress URL expansion for arc company names — clutters timeline */
  .arc-co-name a[href^="http"]::after,
  .repo-name[href^="http"]::after { content: none !important; }
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 880px) {
  .nav { display: none; }
  .nav.open {
    display: flex; flex-direction: column;
    gap: 0; width: 100%;
    padding-block: 0.5rem;
    border-top: 1px solid var(--rule);
  }
  .nav.open a {
    padding: 0.65rem 0.3rem;
    border-bottom: 1px solid var(--rule);
  }
  .nav.open a:last-child { border-bottom: none; }
  .nav.open a::after { display: none; }
  .nav-toggle { display: inline-flex; }
  .topbar-inner { flex-wrap: wrap; row-gap: 0; }

  .intro { padding-block: 3rem 2.5rem; }
  .intro-inner { grid-template-columns: 1fr; gap: 2rem; }
  .intro-photo { order: -1; }
  .intro-photo, .intro-photo img { width: 112px; height: 112px; }

  .band { padding-block: 3.5rem; }
  .band-head { margin-bottom: 2rem; padding-bottom: 1.25rem; }

  .two-col { grid-template-columns: 1fr; gap: 2.5rem; }
  .cards, .repo-grid { grid-template-columns: 1fr; }

  .arc > li { grid-template-columns: 6rem 1fr; gap: 0.4rem 1.25rem; }
  .glossary { grid-template-columns: 1fr; column-gap: 0; }
  .glossary dd { border-top: none; padding-top: 0; padding-bottom: 0.95rem; }
  .links { grid-template-columns: 1fr; gap: 0; }
  .topics { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  :root { --gap: 1rem; }
  .wrap { padding-inline: 1.1rem; }
  .intro h1 { font-size: clamp(2rem, 9vw, 2.6rem); }
  .lede { font-size: 1.1rem; }
  .works.books > li { grid-template-columns: 72px 1fr; gap: 1rem; }
  .cover img { width: 72px; height: 108px; }
  .arc > li { grid-template-columns: 1fr; }
  .arc > li::after { top: 0.5rem; }
  .period { padding-top: 0; }
}