/* ============================================
   Samhita Pal — academic site
   Design tokens
   ============================================ */

:root {
  /* Palette — warm off-white ground, warm near-black ink, stone-gray accent */
  --bg: #FFFFFF;
  --bg-subtle: #F7F6F4;
  --bg-subtle-2: #F1EFEC;
  --text: #1B1B18;
  --text-muted: #6E6B66;
  --text-faint: #9A968F;
  --accent: #A8A29A;      /* light gray accent */
  --accent-dark: #7A756D; /* hover / stronger gray */
  --border: #E3E1DD;
  --border-strong: #CDCAC4;
  --link: #4A4742;

  /* Type */
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --max-width: 880px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--link);
  text-decoration-color: var(--border-strong);
  text-underline-offset: 3px;
  transition: text-decoration-color 0.15s ease, color 0.15s ease;
}

a:hover {
  color: var(--text);
  text-decoration-color: var(--text);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent-dark);
  outline-offset: 2px;
}

img { max-width: 100%; display: block; }

/* ============ Layout shell ============ */

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 28px;
}

/* ============ Header / nav ============ */

.site-header {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(6px);
  z-index: 50;
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 18px;
  gap: 24px;
  flex-wrap: wrap;
}

.site-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.18rem;
  letter-spacing: 0.01em;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}

.site-title:hover { color: var(--text); text-decoration: none; }

nav.site-nav {
  display: flex;
  gap: 26px;
  flex-wrap: wrap;
}

nav.site-nav a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 1px solid transparent;
}

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

nav.site-nav a.active {
  color: var(--text);
  border-bottom-color: var(--accent-dark);
}

/* ============ Page header (eyebrow + title) ============ */

.page-head {
  padding: 56px 0 36px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 44px;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-dark);
  margin: 0 0 10px;
}

.page-head h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 2.1rem;
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}

.page-head p.lede {
  color: var(--text-muted);
  max-width: 640px;
  margin: 0;
  font-size: 1.05rem;
}

/* ============ Hero (About page) ============ */

.hero {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 44px;
  padding: 52px 0 40px;
  align-items: start;
}

.hero-photo img {
  width: 100%;
  border-radius: 4px;
  border: 1px solid var(--border);
  filter: grayscale(8%);
}

.hero-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 2.5rem;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
  line-height: 1.1;
}

.hero-title {
  font-size: 1.05rem;
  color: var(--text);
  margin: 0 0 2px;
}

.hero-affil {
  font-size: 0.98rem;
  color: var(--text-muted);
  margin: 0 0 20px;
}

.hero-blurb {
  max-width: 560px;
  color: var(--text);
  margin: 0 0 22px;
}

.contact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin-bottom: 8px;
}

.pill {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--text);
  border: 1px solid var(--border-strong);
  padding: 6px 12px;
  border-radius: 100px;
  background: var(--bg-subtle);
  transition: background 0.15s ease, border-color 0.15s ease;
}

.pill:hover {
  background: var(--bg-subtle-2);
  border-color: var(--accent-dark);
  color: var(--text);
}

/* ============ Section scaffolding ============ */

section.block {
  padding: 8px 0 48px;
}

.section-label {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 22px;
}

.section-label h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.4rem;
  margin: 0;
}

.section-label .rule {
  flex: 1;
  height: 1px;
  background: var(--border);
}

.section-note {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin: -12px 0 24px;
}

/* ============ News list ============ */

.news-item {
  display: grid;
  grid-template-columns: 108px 1fr;
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.news-item:last-child { border-bottom: none; }

.news-date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-dark);
  letter-spacing: 0.03em;
  padding-top: 2px;
}

.news-text strong { font-weight: 600; }

/* ============ Bio paragraphs ============ */

.prose p { margin: 0 0 16px; }
.prose p:last-child { margin-bottom: 0; }

/* ============ Honors list ============ */

.honors-list {
  list-style: none;
  padding: 0;
  margin: 0;
  columns: 1;
}

.honors-list li {
  padding: 9px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.97rem;
}

.honors-list li:last-child { border-bottom: none; }

.honors-list .yr {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-faint);
  margin-right: 10px;
}

/* ============ Research thrusts ============ */

.thrust {
  padding: 30px 0;
  border-bottom: 1px solid var(--border);
}

.thrust:last-child { border-bottom: none; }

.thrust-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-dark);
  letter-spacing: 0.06em;
  margin-bottom: 8px;
  display: block;
}

.thrust h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  margin: 0 0 10px;
}

.thrust p {
  color: var(--text);
  max-width: 660px;
  margin: 0 0 14px;
}

.thrust-papers {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 0.92rem;
}

.thrust-papers li {
  color: var(--text-muted);
  padding: 4px 0;
  border-left: 2px solid var(--border-strong);
  padding-left: 12px;
  margin-bottom: 4px;
}

.thrust-papers .p-title { color: var(--text); }

.thrust-papers .venue {
  color: #1B5FA8;
  font-weight: 700;
  font-style: italic;
}

/* ============ Publications ============ */

.pub-group { margin-bottom: 44px; }

.pub-group h2 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 4px;
}

.pub-count {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-faint);
}

.pub-list {
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
}

.pub-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.pub-item:last-child { border-bottom: none; }

.pub-title {
  font-weight: 600;
  color: var(--text);
  margin: 0 0 4px;
  font-size: 1.01rem;
}

.pub-authors {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin: 0 0 3px;
}

.pub-authors .me { color: var(--text); font-weight: 600; }

.pub-venue {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #1B5FA8;
  font-weight: 700;
  font-style: italic;
  letter-spacing: 0.02em;
}

/* ============ Software cards ============ */

.software-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.software-card {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 26px 28px;
  background: var(--bg-subtle);
}

.software-card h3 {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0 0 10px;
  letter-spacing: -0.01em;
}

.software-card p {
  margin: 0 0 16px;
  color: var(--text);
  max-width: 620px;
}

.software-links a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  margin-right: 18px;
}

/* ============ Talks & posters ============ */

.talk-item {
  display: grid;
  grid-template-columns: 70px 110px 1fr;
  gap: 18px;
  padding: 15px 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}

.talk-item:last-child { border-bottom: none; }

.talk-year {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-faint);
}

.talk-type {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent-dark);
  border: 1px solid var(--border-strong);
  border-radius: 100px;
  padding: 2px 9px;
  height: fit-content;
  white-space: nowrap;
}

.talk-body .talk-title { font-weight: 600; margin: 0 0 2px; }
.talk-body .talk-venue { color: var(--text-muted); font-size: 0.92rem; margin: 0; }
.talk-body .talk-slides { font-family: var(--font-mono); font-size: 0.78rem; }

/* ============ CV page ============ */

.cv-download {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--bg);
  background: var(--text);
  padding: 12px 22px;
  border-radius: 4px;
  text-decoration: none;
  margin-bottom: 30px;
}

.cv-download:hover { background: var(--accent-dark); color: var(--bg); }

.cv-embed {
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  height: 82vh;
  background: var(--bg-subtle);
}

.cv-embed iframe { width: 100%; height: 100%; border: none; }

.cv-fallback {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 14px;
}

/* ============ Signature motif (projection dots) ============ */

.motif {
  opacity: 0.9;
}

/* ============ Footer ============ */

.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 60px;
  padding: 30px 0 60px;
  color: var(--text-faint);
  font-size: 0.85rem;
  font-family: var(--font-mono);
}

.site-footer a { color: var(--text-muted); }

/* ============ Responsive ============ */

@media (max-width: 680px) {
  .hero {
    grid-template-columns: 1fr;
  }
  .hero-photo { width: 160px; }
  .news-item, .talk-item {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  .talk-type { margin-bottom: 4px; }
  .page-head h1 { font-size: 1.7rem; }
  .hero-name { font-size: 2rem; }
  nav.site-nav { gap: 14px 18px; }
}

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