/* Nandini Chatterjee Singh — clean academic
   ------------------------------------------------ */

:root {
  --ink:        #1a1a18;
  --ink-soft:   #4a4a45;
  --ink-faint:  #7d7d76;
  --rule:       #ddd9d0;
  --paper:      #fbfaf7;
  --paper-alt:  #f3f1ea;
  --accent:     #7a4a1f;
  --accent-soft:#a9784a;
  --measure:    34rem;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans:  -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ---------- layout ---------- */

.wrap {
  max-width: 62rem;
  margin: 0 auto;
  padding: 0 2rem;
}

main { padding-bottom: 6rem; }

section.block {
  padding: 3.5rem 0;
  border-top: 1px solid var(--rule);
}

section.block:first-of-type { border-top: none; }

/* Two-column: sticky label on the left, content on the right */
.cols {
  display: grid;
  grid-template-columns: 12rem 1fr;
  gap: 2.5rem;
  align-items: start;
}

.cols > .label {
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  padding-top: 0.45rem;
  position: sticky;
  top: 5.5rem;
}

.cols > .body > *:first-child { margin-top: 0; }
.cols > .body > *:last-child  { margin-bottom: 0; }

/* ---------- typography ---------- */

h1, h2, h3, h4 { font-weight: 600; line-height: 1.25; }

h1 {
  font-size: clamp(2.1rem, 5vw, 3rem);
  letter-spacing: -0.015em;
  margin: 0 0 0.6rem;
}

h2 {
  font-size: 1.5rem;
  margin: 0 0 1.2rem;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.12rem;
  margin: 2.2rem 0 0.5rem;
}

h3:first-child { margin-top: 0; }

h4 {
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 2rem 0 0.75rem;
  font-weight: 600;
}

p { margin: 0 0 1.15rem; max-width: var(--measure); }

.lead {
  font-size: 1.18rem;
  line-height: 1.6;
  color: var(--ink-soft);
  max-width: 38rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(122, 74, 31, 0.3);
  transition: border-color 0.15s ease, color 0.15s ease;
}

a:hover { color: var(--accent-soft); border-bottom-color: var(--accent-soft); }

strong { font-weight: 600; }

ul { margin: 0 0 1.15rem; padding-left: 1.1rem; max-width: var(--measure); }
li { margin-bottom: 0.45rem; }
li::marker { color: var(--ink-faint); }

.small { font-size: 0.9rem; color: var(--ink-soft); }

/* ---------- header / nav ---------- */

header.site {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(251, 250, 247, 0.94);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--rule);
}

header.site .wrap {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.brand {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--ink);
  border: none;
}

.brand:hover { color: var(--accent); }

nav.site ul {
  list-style: none;
  display: flex;
  gap: 1.4rem;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
  max-width: none;
}

nav.site li { margin: 0; }

nav.site a {
  font-family: var(--sans);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}

nav.site a:hover { color: var(--ink); border-bottom-color: var(--rule); }

nav.site a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

/* ---------- page head ---------- */

.pagehead {
  padding: 4.5rem 0 3rem;
  border-bottom: 1px solid var(--rule);
}

.eyebrow {
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1rem;
}

/* ---------- home hero ---------- */

.hero { padding: 5rem 0 3.5rem; }

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 16rem;
  gap: 3.5rem;
  align-items: start;
}

.portrait {
  margin: 0;
  position: sticky;
  top: 6rem;
}

.portrait img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center 25%;
  border-radius: 3px;
  background: var(--paper-alt);
  filter: saturate(0.92);
}

.portrait figcaption {
  font-family: var(--sans);
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--ink-faint);
  margin-top: 0.7rem;
}

/* If no photo.jpg is present yet, the figure hides itself via JS
   and this placeholder never flashes a broken-image icon. */
.portrait[hidden] { display: none; }

.hero .affil {
  font-size: 1.05rem;
  color: var(--ink-soft);
  max-width: 32rem;
  margin: 0 0 2rem;
}

.hero .affil span { display: block; }

.meta {
  font-family: var(--sans);
  font-size: 0.85rem;
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

/* ---------- numbers strip ---------- */

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
  gap: 2rem;
  margin: 0;
  padding: 0;
  list-style: none;
  max-width: none;
}

.stats li { margin: 0; }

.stats .n {
  display: block;
  font-size: 1.9rem;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--accent);
}

.stats .t {
  display: block;
  font-family: var(--sans);
  font-size: 0.8rem;
  color: var(--ink-soft);
  margin-top: 0.35rem;
  line-height: 1.4;
}

/* ---------- cards ---------- */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: none;
}

.card {
  background: var(--paper-alt);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 1.5rem;
  margin: 0;
}

.card h3 { margin: 0 0 0.5rem; font-size: 1.05rem; }
.card p  { margin: 0; font-size: 0.95rem; color: var(--ink-soft); max-width: none; }

/* ---------- entry list (CV rows) ---------- */

.entries { list-style: none; margin: 0; padding: 0; max-width: none; }

.entries li {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: 1.5rem;
  padding: 0.85rem 0;
  border-top: 1px solid var(--rule);
  margin: 0;
}

.entries li:first-child { border-top: none; padding-top: 0; }

.entries .when {
  font-family: var(--sans);
  font-size: 0.82rem;
  color: var(--ink-faint);
  padding-top: 0.28rem;
  white-space: nowrap;
}

.entries .what { margin: 0; }
.entries .what .where { display: block; font-size: 0.92rem; color: var(--ink-soft); }

/* ---------- pull quote ---------- */

.pull {
  border-left: 2px solid var(--accent);
  padding-left: 1.4rem;
  margin: 2rem 0;
  font-size: 1.1rem;
  color: var(--ink-soft);
  max-width: 36rem;
}

/* ---------- tags ---------- */

.tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  margin: 0;
  max-width: none;
}

.tags li {
  font-family: var(--sans);
  font-size: 0.78rem;
  color: var(--ink-soft);
  background: var(--paper-alt);
  border: 1px solid var(--rule);
  border-radius: 100px;
  padding: 0.25rem 0.75rem;
  margin: 0;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-block;
  font-family: var(--sans);
  font-size: 0.85rem;
  padding: 0.6rem 1.2rem;
  border: 1px solid var(--accent);
  border-radius: 3px;
  color: var(--accent);
  background: transparent;
}

.btn:hover { background: var(--accent); color: var(--paper); border-color: var(--accent); }

/* ---------- footer ---------- */

footer.site {
  border-top: 1px solid var(--rule);
  background: var(--paper-alt);
  padding: 2.5rem 0;
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--ink-soft);
}

footer.site .wrap {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

footer.site p { margin: 0; max-width: none; }

/* ---------- responsive ---------- */

@media (max-width: 46rem) {
  body { font-size: 17px; }
  .wrap { padding: 0 1.25rem; }
  .cols { grid-template-columns: 1fr; gap: 1rem; }
  .cols > .label { position: static; padding-top: 0; }
  .entries li { grid-template-columns: 1fr; gap: 0.2rem; }
  .hero { padding: 3rem 0 2.5rem; }
  .hero-grid { grid-template-columns: 1fr; gap: 2rem; }
  .portrait { position: static; max-width: 11rem; order: -1; }
  .pagehead { padding: 3rem 0 2rem; }
  header.site .wrap { padding-top: 0.75rem; padding-bottom: 0.75rem; }
}

@media print {
  header.site, footer.site, nav.site { display: none; }
  body { background: #fff; font-size: 11pt; }
  a { color: inherit; border: none; }
}