/* ---------------------------------------------------------
   Suvadip Sana — personal academic site
   Elegant editorial theme: serif display type, warm parchment
   palette, hairline rules in place of boxed cards.
   --------------------------------------------------------- */

:root {
  --bg: #faf6ef;
  --bg-soft: #f2ebdd;
  --text: #221f19;
  --text-soft: #6d6455;
  --border: #e1d7c2;
  --accent: #a8471f;
  --accent-soft: #f3e2d2;
  --tag-text: #7a4326;
  --shadow: 0 1px 2px rgba(60, 43, 20, 0.05), 0 2px 6px rgba(60, 43, 20, 0.06);
  --font-serif: "Fraunces", "Iowan Old Style", Georgia, "Times New Roman", serif;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  --max-width: 860px;
  font-size: 17px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1c1710;
    --bg-soft: #251f16;
    --text: #f1ebe0;
    --text-soft: #ada08b;
    --border: #3b3323;
    --accent: #e08a4f;
    --accent-soft: #382a1b;
    --tag-text: #e0a06a;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 2px 8px rgba(0, 0, 0, 0.4);
  }
}

:root[data-theme="dark"] {
  --bg: #1c1710;
  --bg-soft: #251f16;
  --text: #f1ebe0;
  --text-soft: #ada08b;
  --border: #3b3323;
  --accent: #e08a4f;
  --accent-soft: #382a1b;
  --tag-text: #e0a06a;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 2px 8px rgba(0, 0, 0, 0.4);
}

:root[data-theme="light"] {
  --bg: #faf6ef;
  --bg-soft: #f2ebdd;
  --text: #221f19;
  --text-soft: #6d6455;
  --border: #e1d7c2;
  --accent: #a8471f;
  --accent-soft: #f3e2d2;
  --tag-text: #7a4326;
  --shadow: 0 1px 2px rgba(60, 43, 20, 0.05), 0 2px 6px rgba(60, 43, 20, 0.06);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

/* ---------- Nav ---------- */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.2s ease;
}

.site-nav.scrolled {
  box-shadow: 0 2px 10px rgba(40, 28, 12, 0.06);
}

.site-nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.site-nav .brand {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--text);
  letter-spacing: 0.01em;
}

.site-nav .brand:hover {
  text-decoration: none;
  color: var(--accent);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  flex-wrap: wrap;
}

.site-nav ul {
  list-style: none;
  display: flex;
  gap: 1.6rem;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--text-soft);
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  padding-bottom: 3px;
  border-bottom: 1px solid transparent;
}

.site-nav a:hover {
  color: var(--accent);
  text-decoration: none;
}

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

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font-size: 0.85rem;
  line-height: 1;
  cursor: pointer;
  padding: 0;
}

.theme-toggle:hover {
  border-color: var(--accent);
}

/* ---------- Hero ---------- */

.hero {
  padding: 4rem 0 2.5rem;
  display: flex;
  gap: 2.75rem;
  align-items: center;
  flex-wrap: wrap;
}

.hero img {
  width: 164px;
  height: 164px;
  object-fit: cover;
  border-radius: 50%;
  border: 1px solid var(--border);
  outline: 1px solid var(--accent);
  outline-offset: 7px;
  flex-shrink: 0;
  transition: outline-offset 0.25s ease;
}

.hero img:hover {
  outline-offset: 10px;
}

.hero .intro {
  flex: 1;
  min-width: 280px;
}

.eyebrow {
  font-family: var(--font-sans);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--accent);
  margin: 0 0 0.7rem;
}

.hero h1 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(2.2rem, 4.6vw, 3.1rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 0 0 0.4rem;
}

.hero .role {
  color: var(--text-soft);
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 500;
  font-size: 1.15rem;
  margin-bottom: 1.2rem;
}

.lede {
  border-left: 2px solid var(--accent);
  padding-left: 1.1rem;
  font-size: 1.02rem;
}

.links-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.2rem;
  margin-top: 1.3rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}

.pill:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
  text-decoration: none;
}

/* ---------- Sections ---------- */

main {
  padding-bottom: 4rem;
}

section {
  margin-top: 2.8rem;
}

section > h2 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.5rem;
  letter-spacing: -0.005em;
  margin: 0 0 1.5rem;
  padding-bottom: 0.7rem;
  border-bottom: none;
  position: relative;
}

section > h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 44px;
  height: 3px;
  background: var(--accent);
}

h1,
h2,
h3 {
  color: var(--text);
}

.page-header {
  padding: 3rem 0 0.6rem;
}

.page-header h1 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 2.2rem;
  margin: 0 0 0.4rem;
  letter-spacing: -0.01em;
}

.page-header p {
  color: var(--text-soft);
  margin: 0;
  font-style: italic;
  font-family: var(--font-serif);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.tag-list li {
  border: 1px solid var(--border);
  color: var(--text-soft);
  padding: 0.32rem 0.75rem;
  font-family: var(--font-sans);
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.news-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.news-list li {
  display: flex;
  gap: 1.1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.96rem;
}

.news-list li:first-child {
  border-top: 1px solid var(--border);
}

.news-list .date {
  flex-shrink: 0;
  width: 4em;
  color: var(--text-soft);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.92rem;
  padding-top: 0.1rem;
}

/* ---------- Publication / entry rows ---------- */

.entry {
  padding: 1.3rem 0;
  border-top: 1px solid var(--border);
  margin-bottom: 0;
  transition: padding-left 0.2s ease, box-shadow 0.2s ease;
}

.entry:last-child {
  border-bottom: 1px solid var(--border);
}

.entry:hover {
  padding-left: 0.6rem;
  box-shadow: inset 3px 0 0 var(--accent);
}

.entry.hidden {
  display: none;
}

.pub-section.hidden {
  display: none;
}

.entry-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.15rem;
  margin: 0 0 0.3rem;
}

.entry-authors {
  color: var(--text-soft);
  font-size: 0.9rem;
  margin: 0 0 0.15rem;
}

.entry-authors .me {
  color: var(--text);
  font-weight: 700;
}

.entry-venue {
  font-size: 0.82rem;
  font-style: normal;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-soft);
  margin: 0.35rem 0 0.5rem;
}

.badge {
  display: inline-block;
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 0.08rem 0.5rem;
  font-size: 0.68rem;
  font-weight: 700;
  font-style: normal;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-right: 0.5rem;
}

.entry-links a {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-right: 1.2rem;
}

/* ---------- Filter row ---------- */

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.6rem;
  margin: 0 0 2rem;
  border-bottom: 1px solid var(--border);
}

.filter-btn {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-soft);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 0 0 0.8rem;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
}

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

.filter-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ---------- Simple lists (education, awards, talks) ---------- */

.simple-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.simple-list li {
  display: flex;
  gap: 1.2rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
  align-items: baseline;
}

.simple-list li:first-child {
  border-top: 1px solid var(--border);
}

.simple-list .when {
  flex-shrink: 0;
  width: 8.5em;
  color: var(--text-soft);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.92rem;
}

.simple-list .what strong {
  color: var(--text);
  font-weight: 700;
}

.simple-list .what .meta {
  display: block;
  color: var(--text-soft);
  font-size: 0.87rem;
  margin-top: 0.15rem;
}

/* ---------- Blog / prose / placeholders ---------- */

.post-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.post-list li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  transition: padding-left 0.2s ease, box-shadow 0.2s ease;
}

.post-list li:first-child {
  border-top: 1px solid var(--border);
}

.post-list li:hover {
  padding-left: 0.6rem;
  box-shadow: inset 3px 0 0 var(--accent);
}

.post-list-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.2rem;
}

.post-list a {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text);
}

.post-list a:hover {
  color: var(--accent);
}

.post-list .post-date {
  flex-shrink: 0;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.85rem;
  color: var(--text-soft);
}

.post-list .post-excerpt {
  margin: 0.4rem 0 0;
  max-width: 560px;
  color: var(--text-soft);
  font-size: 0.88rem;
  line-height: 1.5;
}

.prose {
  max-width: 640px;
  font-size: 1.02rem;
  line-height: 1.75;
  color: var(--text);
}

.prose p {
  margin: 0 0 1.1rem;
}

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

.prose h2 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.4rem;
  letter-spacing: -0.005em;
  margin: 2.4rem 0 1rem;
}

.prose strong {
  color: var(--text);
  font-weight: 700;
}

.prose em {
  font-style: italic;
}

.placeholder-note {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--text-soft);
}

/* ---------- Skills grid ---------- */

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.4rem;
}

.skills-grid .block h3 {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--accent);
  margin: 0 0 0.5rem;
}

/* ---------- CV subsection helper ---------- */

.subhead {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.05rem;
  color: var(--text);
  margin: 1.8rem 0 0.8rem;
}

section > .subhead:first-of-type {
  margin-top: 0;
}

/* ---------- Job market banner ---------- */

.jobmarket {
  margin-top: 1.8rem;
  padding: 1.1rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  text-align: center;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.08rem;
  color: var(--text);
}

.jobmarket::before {
  content: "◆";
  display: block;
  color: var(--accent);
  font-size: 0.55rem;
  margin-bottom: 0.6rem;
}

.jobmarket strong {
  font-style: normal;
  font-weight: 700;
  color: var(--accent);
}

.jobmarket a {
  font-weight: 600;
}

/* ---------- Typewriter ---------- */

.typewriter {
  border-right: 2px solid var(--accent);
  padding-right: 3px;
}

@media (prefers-reduced-motion: no-preference) {
  .typewriter {
    animation: caret 0.9s steps(1) infinite;
  }
}

@keyframes caret {
  50% {
    border-color: transparent;
  }
}

/* ---------- Journey (horizontal timeline strip) ---------- */

.journey {
  padding-bottom: 0.5rem;
}

.h-timeline {
  position: relative;
  display: flex;
  gap: 1.75rem;
  margin-top: 1.5rem;
  padding-bottom: 0.75rem;
  overflow-x: auto;
  scroll-snap-type: x proximity;
}

.h-timeline::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 5px;
  height: 1px;
  background: var(--border);
}

.h-timeline-item {
  position: relative;
  flex: 1 0 140px;
  text-align: center;
  scroll-snap-align: start;
  transition: transform 0.2s ease;
}

.h-timeline-dot {
  display: block;
  width: 10px;
  height: 10px;
  margin: 0 auto 1.1rem;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 6px var(--bg);
  position: relative;
  z-index: 1;
  transition: transform 0.2s ease;
}

.h-timeline-year {
  display: block;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 2.3rem;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--text);
  transition: color 0.2s ease;
}

.h-timeline-label {
  margin: 0.5rem auto 0;
  max-width: 170px;
  font-family: var(--font-sans);
  font-size: 0.84rem;
  line-height: 1.4;
  color: var(--text-soft);
}

.h-timeline-item:hover .h-timeline-dot {
  transform: scale(1.35);
}

.h-timeline-item:hover .h-timeline-year {
  color: var(--accent);
}

@media (max-width: 640px) {
  .h-timeline-year {
    font-size: 1.8rem;
  }
  .h-timeline-item {
    flex: 1 0 120px;
  }
}

/* ---------- Footer ---------- */

footer {
  border-top: 1px solid var(--border);
  padding: 2.2rem 0 3rem;
  color: var(--text-soft);
  font-size: 0.85rem;
  font-style: italic;
  font-family: var(--font-serif);
}

footer a {
  color: var(--text-soft);
  text-decoration: underline;
}

@media (max-width: 520px) {
  .hero {
    text-align: center;
    justify-content: center;
  }
  .hero .links-row,
  .hero .role {
    justify-content: center;
  }
  .lede {
    text-align: left;
  }
  .links-row {
    justify-content: center;
  }
  .simple-list li,
  .news-list li {
    flex-direction: column;
    gap: 0.15rem;
  }
  .simple-list .when,
  .news-list .date {
    width: auto;
  }
}

/* ---------- Back to top ---------- */

.back-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 1.05rem;
  cursor: pointer;
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
  z-index: 20;
}

.back-to-top.visible {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.back-to-top:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ---------- Print ---------- */

@media print {
  .site-nav,
  footer,
  .jobmarket,
  .theme-toggle,
  .back-to-top,
  .filter-row {
    display: none !important;
  }
  body {
    background: #ffffff;
    color: #000000;
  }
  a {
    color: #000000;
    text-decoration: underline;
  }
  .entry,
  .simple-list li {
    break-inside: avoid;
  }
  .entry:hover {
    padding-left: 0;
    box-shadow: none;
  }
  main {
    max-width: 100%;
  }
}