/* ===================================================================
   Dibya Mishra — site styles
   Editorial academic: warm paper, oxblood accent, Fraunces display.
   Every color is a variable below. You rarely need to edit anything else.
   =================================================================== */

:root {
  /* Light mode palette */
  --paper:       #f8f5ee;
  --paper-2:     #f1ece1;
  --ink:         #24201c;
  --ink-soft:    #57504a;
  --ink-faint:   #8b8279;
  --rule:        #ddd5c7;
  --accent:      #8b2635;
  --accent-soft: #a84353;

  /* Type */
  --display: "Fraunces", Georgia, serif;
  --body:    "Source Serif 4", Georgia, serif;
  --mono:    "IBM Plex Mono", ui-monospace, monospace;

  /* Layout */
  --measure: 44rem;
  --measure-wide: 62rem;
  --pad: clamp(1.25rem, 5vw, 2.5rem);
}

:root[data-theme="dark"] {
  --paper:       #17151a;
  --paper-2:     #201d24;
  --ink:         #ece7e1;
  --ink-soft:    #b3aca4;
  --ink-faint:   #837b74;
  --rule:        #35303a;
  --accent:      #d97a87;
  --accent-soft: #e8a0aa;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper:       #17151a;
    --paper-2:     #201d24;
    --ink:         #ece7e1;
    --ink-soft:    #b3aca4;
    --ink-faint:   #837b74;
    --rule:        #35303a;
    --accent:      #d97a87;
    --accent-soft: #e8a0aa;
  }
}

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

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: clamp(1.0625rem, 0.4vw + 1rem, 1.1875rem);
  line-height: 1.65;
  font-variant-numeric: oldstyle-nums;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.2s ease, color 0.2s ease;
}

/* ---------- Layout containers ---------- */

.wrap {
  width: 100%;
  max-width: var(--measure);
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}

.wrap-wide {
  width: 100%;
  max-width: var(--measure-wide);
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}

/* ---------- Typography ---------- */

h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 2.5rem 0 0.75rem;
}

h1 { font-size: clamp(2rem, 4vw + 1rem, 3rem); margin-top: 0; }
h2 { font-size: clamp(1.4rem, 1.5vw + 1rem, 1.85rem); }
h3 { font-size: clamp(1.15rem, 0.8vw + 1rem, 1.35rem); }

p { margin: 0 0 1.15rem; }

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.15s ease;
}
a:hover { color: var(--accent-soft); }

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

.eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 0.6rem;
}

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 3rem 0;
}

blockquote {
  margin: 1.75rem 0;
  padding-left: 1.25rem;
  border-left: 2px solid var(--accent);
  color: var(--ink-soft);
  font-style: italic;
}

code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: var(--paper-2);
  padding: 0.12em 0.35em;
  border-radius: 3px;
}

pre {
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 1rem;
  overflow-x: auto;
}
pre code { background: none; padding: 0; }

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

/* ---------- Site header ---------- */

.site-header {
  border-bottom: 1px solid var(--rule);
  padding: 1.5rem 0;
  margin-bottom: 3rem;
}

.header-inner {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.site-name {
  font-family: var(--display);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
}
.site-name:hover { color: var(--accent); }

.site-nav {
  display: flex;
  align-items: baseline;
  gap: 1.35rem;
  flex-wrap: wrap;
}

.site-nav a {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  text-decoration: none;
}
.site-nav a:hover { color: var(--accent); }
.site-nav a[aria-current="page"] { color: var(--accent); }

.theme-toggle {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: transparent;
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 0.25rem 0.7rem;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

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

.hero {
  display: grid;
  grid-template-columns: 1fr 8.5rem;
  gap: 2.5rem;
  align-items: start;
  margin-bottom: 3.5rem;
}

.hero h1 { margin-bottom: 0.4rem; }

.hero-affil {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  margin: 0 0 1.5rem;
}

.hero-portrait {
  width: 8.5rem;
  height: 8.5rem;
  object-fit: cover;
  border-radius: 3px;
  filter: grayscale(18%);
}

@media (max-width: 34rem) {
  .hero { grid-template-columns: 1fr; gap: 1.5rem; }
  .hero-portrait { width: 6.5rem; height: 6.5rem; }
}

/* ---------- Section blocks ---------- */

.section { margin: 3.5rem 0; }

.section > h2 {
  font-size: 0.72rem;
  font-family: var(--mono);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 1.5rem;
}

/* ---------- Updates list ---------- */

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

.updates li {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 1rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--rule);
}
.updates li:last-child { border-bottom: 0; }

.updates time {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  padding-top: 0.32rem;
}

@media (max-width: 34rem) {
  .updates li { grid-template-columns: 1fr; gap: 0.15rem; }
}

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

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1rem;
}

.card {
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 1.15rem 1.25rem;
  background: var(--paper-2);
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }

.card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
}
.card h3 a { text-decoration: none; }

.card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--ink-soft);
  line-height: 1.5;
}

.card-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-top: 0.7rem;
}

/* ---------- Research entries ---------- */

.paper {
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--rule);
}
.paper:last-child { border-bottom: 0; }

.paper-title {
  font-family: var(--display);
  font-size: 1.08rem;
  font-weight: 600;
  line-height: 1.3;
  margin: 0 0 0.3rem;
}

.paper-meta {
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin: 0 0 0.45rem;
}

.paper-links {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.paper-links a { margin-right: 0.9rem; text-decoration: none; }
.paper-links a:hover { text-decoration: underline; }

.paper-abstract {
  font-size: 0.95rem;
  color: var(--ink-soft);
  margin: 0.5rem 0 0;
}

/* ---------- Journal index ---------- */

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

.post-list li {
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--rule);
}
.post-list li:last-child { border-bottom: 0; }

.post-list h3 { margin: 0 0 0.3rem; font-size: 1.15rem; }
.post-list h3 a { text-decoration: none; }
.post-list h3 a:hover { text-decoration: underline; }

.post-date {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  display: block;
  margin-bottom: 0.35rem;
}

.post-summary {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.97rem;
}

/* ---------- Single post ---------- */

.post-header { margin-bottom: 2.5rem; }
.post-header h1 { margin-bottom: 0.5rem; }

.post-content h2 { margin-top: 2.75rem; }
.post-content ul, .post-content ol { padding-left: 1.35rem; }
.post-content li { margin-bottom: 0.4rem; }

.post-nav {
  margin-top: 4rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.post-nav a { text-decoration: none; }

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

.site-footer {
  margin-top: 6rem;
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--rule);
  color: var(--ink-faint);
  font-size: 0.87rem;
}

.footer-links {
  display: flex;
  gap: 1.1rem;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.footer-links a { text-decoration: none; }

.disclaimer {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.5;
  max-width: 40rem;
}

/* ---------- Contact block and link row (homepage) ---------- */

.hero-detail {
  font-size: 0.97rem;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0 0 1.25rem;
}

.linkrow {
  display: flex;
  gap: 1.1rem;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0;
}
.linkrow a { text-decoration: none; }
.linkrow a:hover { text-decoration: underline; }

.fields {
  font-size: 1rem;
  color: var(--ink);
  margin: 0;
}