/* ─────────────────────────────────────────────
   Ash · LaTeX-themed personal site
   Palette: parchment · ink · forest · sepia · accent red
   ───────────────────────────────────────────── */

:root {
  --paper: #f7f2e7;
  --paper-warm: #f1ead9;
  --ink: #1c1a17;
  --ink-soft: #3b3530;
  --sepia: #6b533b;
  --forest: #2b4a33;
  --forest-soft: #4a6b51;
  --accent: #a43d2c;
  --rule: #d7ccb3;
  --math-bg: #efe7d2;
}

@font-face {
  font-family: 'Computer Modern Serif';
  src: url('https://cdn.jsdelivr.net/gh/aaaakshat/cm-web-fonts@latest/fonts/Serif/cmun-serif.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Computer Modern Serif';
  src: url('https://cdn.jsdelivr.net/gh/aaaakshat/cm-web-fonts@latest/fonts/Serif/cmun-serif-italic.woff2') format('woff2');
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: 'Computer Modern Serif';
  src: url('https://cdn.jsdelivr.net/gh/aaaakshat/cm-web-fonts@latest/fonts/Serif/cmun-serif-bold.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Computer Modern Typewriter';
  src: url('https://cdn.jsdelivr.net/gh/aaaakshat/cm-web-fonts@latest/fonts/Typewriter/cmun-typewriter.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Computer Modern Serif', 'Latin Modern Roman', 'CMU Serif', 'Libertinus Serif', 'EB Garamond', Georgia, serif;
  background: var(--paper);
  color: var(--ink);
  font-size: 18px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  background-image:
    radial-gradient(circle at 18% 8%, rgba(107, 83, 59, 0.05) 0%, transparent 35%),
    radial-gradient(circle at 82% 76%, rgba(43, 74, 51, 0.05) 0%, transparent 40%);
  min-height: 100vh;
}

/* Subtle paper texture */
body::before {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none;
  background-image:
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.4 0 0 0 0 0.32 0 0 0 0 0.2 0 0 0 0.08 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  opacity: 0.6;
  z-index: 0;
}

main, header, footer, nav { position: relative; z-index: 1; }

/* ── Typography ────────────────────────────── */
h1, h2, h3, h4 {
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.latex-cmd { color: var(--accent); font-family: 'Computer Modern Typewriter', ui-monospace, monospace; }
.latex-arg { color: var(--forest); }
.latex-gray { color: var(--sepia); opacity: 0.7; }

.display-math {
  display: block;
  text-align: center;
  margin: 1.4rem 0;
  color: var(--ink-soft);
}

/* ── Nav ───────────────────────────────────── */
nav.topbar {
  position: sticky; top: 0;
  background: rgba(247, 242, 231, 0.88);
  backdrop-filter: saturate(1.1) blur(8px);
  -webkit-backdrop-filter: saturate(1.1) blur(8px);
  border-bottom: 1px solid var(--rule);
  padding: 0.7rem 2rem;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.95rem;
  z-index: 10;
}
nav.topbar .logo {
  font-weight: 700;
  font-style: italic;
  letter-spacing: 0.02em;
}
nav.topbar .logo::before { content: "§ "; color: var(--accent); font-style: normal; }
nav.topbar ul { list-style: none; display: flex; gap: 1.6rem; }
nav.topbar a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px dotted transparent;
  transition: color 160ms, border-color 160ms;
}
nav.topbar a:hover { color: var(--accent); border-bottom-color: var(--accent); }

/* ── Layout container ──────────────────────── */
.page {
  max-width: 860px;
  margin: 0 auto;
  padding: 4rem 2rem 6rem;
}

/* ── Hero / title page ─────────────────────── */
.hero {
  text-align: center;
  padding: 4rem 0 3rem;
  position: relative;
}
.hero .docclass {
  font-family: 'Computer Modern Typewriter', ui-monospace, monospace;
  font-size: 0.85rem;
  color: var(--sepia);
  margin-bottom: 2.4rem;
  line-height: 1.8;
  opacity: 0.85;
}
.hero .docclass .muted { opacity: 0.55; }
.hero h1 {
  font-size: clamp(4.5rem, 12vw, 9rem);
  font-weight: 400;
  letter-spacing: -0.04em;
  line-height: 0.95;
  margin: 0.8rem 0;
}
.hero h1 .dot { color: var(--accent); }
.hero .subtitle {
  font-style: italic;
  font-size: 1.15rem;
  color: var(--ink-soft);
  margin-top: 0.6rem;
  letter-spacing: 0.02em;
}
.hero .author-meta {
  font-family: 'Computer Modern Typewriter', ui-monospace, monospace;
  font-size: 0.82rem;
  color: var(--sepia);
  margin-top: 1.8rem;
}
.hero .divider-art {
  margin: 3rem auto 0;
  width: 220px;
  opacity: 0.7;
}

/* ── Abstract (summary) ────────────────────── */
.abstract {
  max-width: 640px;
  margin: 3rem auto 4rem;
  padding: 1.6rem 2rem;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  text-align: justify;
  hyphens: auto;
}
.abstract h4 {
  text-align: center;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  color: var(--ink-soft);
}
.abstract p { font-size: 1rem; color: var(--ink-soft); }

/* ── Sections ─────────────────────────────── */
section {
  margin: 4.5rem 0;
  scroll-margin-top: 80px;
}
section > h2 {
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--ink);
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 1.5rem;
  display: flex; align-items: baseline; gap: 0.6rem;
}
section > h2 .sec-num {
  font-weight: 700;
  color: var(--accent);
  font-size: 1.3rem;
}
section > h2 .sec-tag {
  margin-left: auto;
  font-family: 'Computer Modern Typewriter', ui-monospace, monospace;
  font-size: 0.75rem;
  color: var(--sepia);
  font-weight: 400;
  letter-spacing: 0.05em;
}

/* drop cap */
.dropcap::first-letter {
  font-size: 3.6rem;
  float: left;
  line-height: 0.9;
  padding: 0.3rem 0.5rem 0 0;
  font-weight: 700;
  color: var(--forest);
}

/* ── About ────────────────────────────────── */
.about-layout {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 2.4rem;
  align-items: start;
}
.about-layout p + p { margin-top: 0.9rem; }
.about-layout p { text-align: justify; hyphens: auto; }
.about-art {
  border: 1px solid var(--rule);
  padding: 8px;
  background: var(--paper-warm);
  box-shadow: 0 2px 0 rgba(0,0,0,0.02);
}
.about-art img {
  width: 100%; display: block;
  filter: sepia(0.12) contrast(1.02);
}
.about-art .caption {
  font-family: 'Computer Modern Typewriter', ui-monospace, monospace;
  font-size: 0.72rem;
  color: var(--sepia);
  text-align: center;
  margin-top: 0.6rem;
  letter-spacing: 0.04em;
}

/* ── Research cards ───────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.2rem;
  margin-top: 1rem;
}
.card {
  border: 1px solid var(--rule);
  background: rgba(255,255,255,0.35);
  padding: 1.3rem 1.4rem;
  position: relative;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}
.card:hover {
  transform: translateY(-2px);
  background: rgba(255,255,255,0.6);
  box-shadow: 0 10px 24px -12px rgba(60, 40, 20, 0.2);
}
.card .card-num {
  font-family: 'Computer Modern Typewriter', ui-monospace, monospace;
  font-size: 0.72rem;
  color: var(--sepia);
  letter-spacing: 0.1em;
}
.card h3 {
  margin: 0.4rem 0 0.5rem;
  font-size: 1.15rem;
  color: var(--ink);
}
.card p {
  font-size: 0.96rem;
  color: var(--ink-soft);
  line-height: 1.55;
}
.card .kw {
  margin-top: 0.9rem;
  font-family: 'Computer Modern Typewriter', ui-monospace, monospace;
  font-size: 0.72rem;
  color: var(--forest);
  letter-spacing: 0.04em;
}

/* ── Craft section (timeline-ish) ─────────── */
.craft-list { list-style: none; padding: 0; }
.craft-list li {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 1.4rem;
  padding: 1rem 0;
  border-top: 1px dashed var(--rule);
}
.craft-list li:last-child { border-bottom: 1px dashed var(--rule); }
.craft-list .period {
  font-family: 'Computer Modern Typewriter', ui-monospace, monospace;
  font-size: 0.78rem;
  color: var(--sepia);
  padding-top: 0.15rem;
}
.craft-list h3 { font-size: 1.05rem; margin-bottom: 0.25rem; }
.craft-list p { font-size: 0.95rem; color: var(--ink-soft); }

/* ── Field notes (middle art piece) ───────── */
.field-notes {
  margin: 4.5rem 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
  padding: 2rem 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.field-notes img {
  width: 100%; display: block;
  filter: sepia(0.15) contrast(1.02);
  border: 1px solid var(--rule);
  padding: 6px;
  background: var(--paper-warm);
}
.field-notes blockquote {
  font-style: italic;
  font-size: 1.25rem;
  line-height: 1.5;
  color: var(--ink-soft);
  padding: 0 0.5rem;
  border-left: 3px solid var(--forest);
  padding-left: 1.2rem;
}
.field-notes blockquote cite {
  display: block;
  margin-top: 0.8rem;
  font-style: normal;
  font-family: 'Computer Modern Typewriter', ui-monospace, monospace;
  font-size: 0.78rem;
  color: var(--sepia);
}

/* ── Equations float ──────────────────────── */
.math-banner {
  display: flex; justify-content: space-around; flex-wrap: wrap;
  gap: 1.8rem;
  padding: 1.6rem 1rem;
  margin: 2rem 0;
  background: var(--math-bg);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  color: var(--ink-soft);
  font-size: 0.95rem;
}
.math-banner .m { min-width: 140px; text-align: center; }
.math-banner .m .lbl {
  display: block;
  font-family: 'Computer Modern Typewriter', ui-monospace, monospace;
  font-size: 0.7rem;
  color: var(--sepia);
  margin-top: 0.3rem;
  letter-spacing: 0.08em;
}

/* ── Contact ──────────────────────────────── */
.signoff {
  text-align: center;
  margin-top: 5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--rule);
}
.signoff .sig {
  font-family: 'Computer Modern Serif', serif;
  font-style: italic;
  font-size: 2.8rem;
  color: var(--forest);
  letter-spacing: -0.02em;
}
.signoff p {
  color: var(--ink-soft);
  margin: 0.6rem 0 1.2rem;
}
.contact-links {
  display: inline-flex; gap: 1.4rem;
  font-family: 'Computer Modern Typewriter', ui-monospace, monospace;
  font-size: 0.9rem;
}
.contact-links a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px dotted var(--sepia);
  transition: color 160ms, border-color 160ms;
}
.contact-links a:hover { color: var(--accent); border-bottom-color: var(--accent); }

footer {
  text-align: center;
  padding: 2rem 1rem;
  font-family: 'Computer Modern Typewriter', ui-monospace, monospace;
  font-size: 0.78rem;
  color: var(--sepia);
  border-top: 1px solid var(--rule);
  margin-top: 3rem;
}
footer .pagenum::before { content: "— "; }
footer .pagenum::after { content: " —"; }

/* ── Decorative botanical svg ─────────────── */
.botanical {
  color: var(--forest);
  opacity: 0.55;
}

/* ── Responsive ───────────────────────────── */
@media (max-width: 720px) {
  body { font-size: 17px; }
  .page { padding: 2rem 1.25rem 4rem; }
  .about-layout { grid-template-columns: 1fr; }
  .about-art { max-width: 320px; margin: 0 auto; }
  .card-grid { grid-template-columns: 1fr; }
  .field-notes { grid-template-columns: 1fr; }
  .craft-list li { grid-template-columns: 1fr; gap: 0.3rem; }
  nav.topbar { padding: 0.6rem 1rem; }
  nav.topbar ul { gap: 1rem; font-size: 0.85rem; }
  .hero h1 { font-size: 4.5rem; }
}

/* KaTeX color to match ink */
.katex { color: var(--ink-soft) !important; font-size: 1em !important; }

/* ── Override globals.css (black body, custom cursor) so LaTeX palette wins ── */
html, body { background: var(--paper) !important; color: var(--ink) !important; }
body { font-family: 'Computer Modern Serif', 'Latin Modern Roman', 'CMU Serif', 'Libertinus Serif', 'EB Garamond', Georgia, serif !important; cursor: auto !important; }
body * { cursor: auto; }
/* hide CustomCursor overlay on the LaTeX home page */
body > div[style*="position: fixed"][style*="pointer-events: none"] { display: none !important; }
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--paper-warm); }
::-webkit-scrollbar-thumb { background: var(--sepia); border-radius: 0; }