/* ===== Tokens ===== */
:root, [data-theme="dark"] {
  --bg-0: #0d0a08;
  --bg-1: #15110d;
  --bg-2: #1d1814;
  --ink: #f4ecdf;
  --ink-soft: #c8bca7;
  --ink-mute: #8a7e6a;
  --accent: #d97757;
  --accent-soft: #e89d7c;
  --accent-deep: #b8593b;
  --gold: #d4a574;
  --line: rgba(244, 236, 223, 0.08);
  --line-strong: rgba(244, 236, 223, 0.16);
  --table-border: rgba(244, 236, 223, 0.28);
  --glass: rgba(29, 24, 20, 0.55);
  --glass-strong: rgba(29, 24, 20, 0.75);
  --grain-color: 1 1 1;     /* white grain on dark */
  --grain-opacity: 0.025;
  --grad-1: rgba(217, 119, 87, 0.15);
  --grad-2: rgba(212, 165, 116, 0.10);
  --grad-3: rgba(184, 89, 59, 0.12);
  --nav-bg: rgba(13, 10, 8, 0.65);
  --footer-bg: rgba(13, 10, 8, 0.6);
  --btn-primary-fg: #1a1208;
  --shadow: 0 30px 60px -20px rgba(0,0,0,0.5), 0 8px 24px -12px rgba(0,0,0,0.45);
  --radius: 18px;
  --radius-sm: 12px;
  --serif: "Cormorant Garamond", "Times New Roman", Georgia, serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

[data-theme="light"] {
  --bg-0: #f7f1e6;
  --bg-1: #f0e7d5;
  --bg-2: #e8dcc4;
  --ink: #2a1f15;
  --ink-soft: #5a4632;
  --ink-mute: #8a7559;
  --accent: #c25d36;
  --accent-soft: #a04826;
  --accent-deep: #8a3d1f;
  --gold: #a87c47;
  --line: rgba(42, 31, 21, 0.10);
  --line-strong: rgba(42, 31, 21, 0.20);
  --table-border: rgba(42, 31, 21, 0.32);
  --glass: rgba(255, 250, 240, 0.55);
  --glass-strong: rgba(255, 250, 240, 0.78);
  --grain-color: 0 0 0;
  --grain-opacity: 0.02;
  --grad-1: rgba(194, 93, 54, 0.18);
  --grad-2: rgba(168, 124, 71, 0.12);
  --grad-3: rgba(138, 61, 31, 0.10);
  --nav-bg: rgba(247, 241, 230, 0.78);
  --footer-bg: rgba(247, 241, 230, 0.6);
  --btn-primary-fg: #fff7eb;
  --shadow: 0 30px 60px -22px rgba(80, 50, 25, 0.20), 0 6px 18px -10px rgba(80, 50, 25, 0.18);
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: clip; }
/* Form controls inherit fonts (Chrome/Safari override UA defaults like Arial) */
button, input, select, textarea { font-family: inherit; font-size: inherit; }
body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background-color: var(--bg-0);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip; /* clip avoids creating a scroll container that breaks anchor jumps */
  transition: background-color .3s, color .3s;
}

/* Background gradient + grain */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 0%, var(--grad-1), transparent 60%),
    radial-gradient(ellipse 70% 50% at 100% 30%, var(--grad-2), transparent 65%),
    radial-gradient(ellipse 90% 70% at 50% 110%, var(--grad-3), transparent 60%),
    linear-gradient(180deg, var(--bg-0), var(--bg-1) 50%, var(--bg-0));
  z-index: -2;
  transition: background .3s;
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/><feColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.025 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  pointer-events: none;
  z-index: -1;
  opacity: 0.4;
  mix-blend-mode: overlay;
}

a { color: var(--accent-soft); text-decoration: none; transition: color .2s; }
a:hover { color: var(--ink); }

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

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ===== Nav ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--nav-bg);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid var(--line);
  transition: background .3s;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  max-width: 1120px;
  margin: 0 auto;
}
.brand {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--ink);
}
.brand em {
  color: var(--accent);
  font-style: italic;
  font-weight: 400;
}
.brand a { transition: opacity .2s; }
.brand a:hover { opacity: 0.75; }

/* Skip to content link — hidden until focused */
.skip-link {
  position: absolute;
  top: -40px;
  left: 16px;
  background: var(--accent);
  color: var(--btn-primary-fg);
  padding: 10px 18px;
  border-radius: 0 0 8px 8px;
  font-size: 14px;
  font-weight: 600;
  z-index: 200;
  transition: top .15s;
}
.skip-link:focus { top: 0; outline: 2px solid var(--ink); outline-offset: 2px; }
.nav-links {
  display: flex;
  gap: 28px;
  align-items: center;
  font-size: 14px;
}
.nav-links a {
  color: var(--ink-soft);
  font-weight: 500;
}
.nav-links a:hover { color: var(--accent-soft); }
.lang, .theme-toggle {
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  color: var(--ink-soft);
  background: var(--glass);
  transition: all .2s;
  cursor: pointer;
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  line-height: 1;
}
.lang:hover, .theme-toggle:hover { border-color: var(--accent); color: var(--accent-soft); }
.theme-toggle { padding: 6px 10px; }
.theme-toggle svg { width: 16px; height: 16px; }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="light"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }
.menu-btn {
  display: none;
  background: var(--glass);
  border: 1px solid var(--line-strong);
  color: var(--ink);
  cursor: pointer;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  align-items: center;
  justify-content: center;
  padding: 0;
}
.menu-btn svg { width: 20px; height: 20px; }
.menu-btn:hover { border-color: var(--accent); color: var(--accent-soft); }

/* ===== Hero ===== */
.hero {
  padding: 110px 0 90px;
  position: relative;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 60px;
  align-items: center;
}
.eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(217, 119, 87, 0.35);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 28px;
  background: rgba(217, 119, 87, 0.06);
}
.hero h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(40px, 5.5vw, 72px);
  line-height: 1.05;
  letter-spacing: -0.5px;
  margin: 0 0 24px;
}
.hero h1 em {
  color: var(--accent);
  font-style: italic;
}
.hero-lede {
  font-size: 18px;
  color: var(--ink-soft);
  line-height: 1.7;
  max-width: 560px;
  margin: 0 0 36px;
}
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.2px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, background .2s, border-color .2s, color .2s;
}
.btn-primary {
  background: var(--accent);
  color: var(--btn-primary-fg);
}
.btn-primary:hover { background: var(--accent-soft); color: var(--btn-primary-fg); transform: translateY(-1px); }
.btn-ghost {
  background: rgba(29, 24, 20, 0.5);
  border-color: var(--line-strong);
  color: var(--ink);
  backdrop-filter: blur(10px);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-soft); }

/* Author card */
.author-card {
  background: var(--glass);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 32px;
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  box-shadow: var(--shadow);
}
.author-card h3 {
  font-family: var(--serif);
  font-size: 26px;
  margin: 0 0 6px;
  color: var(--ink);
  font-weight: 600;
}
.author-card .role {
  font-size: 13px;
  color: var(--accent-soft);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 22px;
}
.author-card dl {
  margin: 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px 18px;
  font-size: 14px;
}
.author-card dt {
  color: var(--ink-mute);
  font-weight: 500;
}
.author-card dd {
  margin: 0;
  color: var(--ink-soft);
}

/* ===== Section ===== */
.section { padding: 90px 0; position: relative; scroll-margin-top: 80px; }
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 50px;
  gap: 28px;
  flex-wrap: wrap;
}
.section-head h2 {
  font-family: var(--serif);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 500;
  letter-spacing: -0.3px;
  margin: 0;
  line-height: 1.1;
}
.section-head h2 em { color: var(--accent); font-style: italic; }
.section-num {
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--ink-mute);
  text-transform: uppercase;
}
.section-lede {
  max-width: 720px;
  color: var(--ink-soft);
  font-size: 17px;
  line-height: 1.75;
}

/* ===== Dissertation ===== */
.dissertation-card {
  background: var(--glass);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 48px;
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: start;
}
.diss-title {
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 600;
  line-height: 1.25;
  margin: 0 0 16px;
  color: var(--ink);
}
.diss-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}
.tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: 12px;
  background: rgba(217, 119, 87, 0.1);
  border: 1px solid rgba(217, 119, 87, 0.25);
  color: var(--accent-soft);
  border-radius: 999px;
  letter-spacing: 0.02em;
}
.diss-abstract {
  color: var(--ink-soft);
  font-size: 15.5px;
  line-height: 1.75;
  margin: 0 0 24px;
}
.diss-key {
  font-size: 14px;
  color: var(--ink-mute);
  border-top: 1px solid var(--line);
  padding-top: 18px;
  margin-top: 18px;
}
.diss-key b { color: var(--ink-soft); font-weight: 500; }
.diss-side h4 {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 14px;
  color: var(--ink);
}
.diss-list {
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
  font-size: 14px;
  color: var(--ink-soft);
}
.diss-list li {
  position: relative;
  padding: 8px 0 8px 22px;
  border-bottom: 1px dashed var(--line);
}
.diss-list li:last-child { border-bottom: 0; }
.diss-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 17px;
  width: 10px;
  height: 1px;
  background: var(--accent);
}

/* ===== Publications ===== */
.pub-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 32px;
}
.tab-btn {
  padding: 10px 20px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(29, 24, 20, 0.4);
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all .2s;
  font-family: var(--sans);
  backdrop-filter: blur(10px);
}
.tab-btn:hover { color: var(--ink); border-color: var(--accent); }
.tab-btn.active {
  background: var(--accent);
  color: var(--btn-primary-fg);
  border-color: var(--accent);
}
.tab-btn .count {
  display: inline-block;
  margin-left: 6px;
  font-size: 11px;
  opacity: 0.7;
}

.pub-list {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: pub;
  display: grid;
  gap: 14px;
}
.pub-item {
  display: none;
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 26px 28px 26px 70px;
  position: relative;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: border-color .2s, transform .2s, background .2s;
}
.pub-item.show { display: block; }
.pub-item:hover {
  border-color: rgba(217, 119, 87, 0.5);
  background: rgba(29, 24, 20, 0.7);
  transform: translateY(-2px);
}
.pub-item::before {
  counter-increment: pub;
  content: counter(pub, decimal-leading-zero);
  position: absolute;
  left: 24px;
  top: 26px;
  font-family: var(--serif);
  font-size: 22px;
  color: var(--accent);
  font-style: italic;
  font-weight: 500;
}
.pub-item.show ~ .pub-item.show::before { /* keeps counter visible */ }
.pub-authors {
  font-size: 13px;
  color: var(--ink-mute);
  margin-bottom: 6px;
  letter-spacing: 0.01em;
}
.pub-title {
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.35;
  font-weight: 500;
  color: var(--ink);
  margin: 0 0 10px;
}
.pub-venue {
  font-size: 14px;
  color: var(--ink-soft);
  font-style: italic;
  margin-bottom: 10px;
}
.pub-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  font-size: 12.5px;
  align-items: center;
}
.pub-meta .pages {
  color: var(--ink-mute);
}
.pub-doi {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(217, 119, 87, 0.08);
  border: 1px solid rgba(217, 119, 87, 0.2);
  color: var(--accent-soft);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.02em;
}
.pub-doi:hover { background: rgba(217, 119, 87, 0.18); color: var(--ink); }
.pub-isbn {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(212, 165, 116, 0.1);
  border: 1px solid rgba(212, 165, 116, 0.25);
  color: var(--gold);
  font-size: 12px;
  font-weight: 500;
}

/* ===== Footer ===== */
.footer {
  border-top: 1px solid var(--line);
  padding: 50px 0 40px;
  background: var(--footer-bg);
  transition: background .3s;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--ink-mute);
}
.footer a { color: var(--ink-soft); }
.footer a:hover { color: var(--accent-soft); }
.footer-profiles { display: flex; gap: 12px; align-items: center; }
.footer-profiles a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: var(--glass);
  color: var(--ink-soft);
  transition: all .15s;
}
.footer-profiles a:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-1px); }

/* Citation buttons on publication items */
.pub-cite {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(244, 236, 223, 0.05);
  border: 1px solid var(--line);
  color: var(--ink-mute);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  font-family: var(--sans);
  transition: all .15s;
}
.pub-cite:hover { color: var(--accent-soft); border-color: var(--accent); }
.pub-cite.copied { color: var(--accent); border-color: var(--accent); background: rgba(217, 119, 87, 0.08); }
.pub-cited-by {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  font-size: 12px;
  color: var(--ink-mute);
  font-style: italic;
}
.pub-cited-by[data-count] strong {
  color: var(--accent);
  font-weight: 600;
  font-style: normal;
}

/* Reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s ease, transform .8s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ===== Responsive ===== */
@media (max-width: 880px) {
  .hero { padding: 70px 0 60px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .dissertation-card { grid-template-columns: 1fr; padding: 32px; gap: 30px; }
  .section { padding: 70px 0; }
  /* Hamburger drawer */
  .menu-btn { display: inline-flex; }
  .nav-links {
    position: fixed;
    top: 0;
    right: 0;
    width: 80%;
    max-width: 340px;
    height: 100vh;
    background: var(--bg-1);
    border-left: 1px solid var(--line-strong);
    flex-direction: column;
    align-items: stretch;
    padding: 80px 28px 32px;
    gap: 8px;
    transform: translateX(100%);
    transition: transform .25s ease;
    z-index: 60;
    box-shadow: -20px 0 40px -20px rgba(0,0,0,0.4);
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a {
    display: block;
    padding: 14px 16px;
    border-radius: 10px;
    border: 1px solid var(--line);
    font-size: 15px;
    font-weight: 500;
  }
  .nav-links a.lang { text-align: center; margin-top: auto; }
  .nav-links .theme-toggle { width: 100%; justify-content: flex-start; padding: 14px 16px; border-radius: 10px; font-size: 15px; }
  /* Backdrop when menu open */
  .menu-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,0.45); z-index: 55; opacity: 0; pointer-events: none; transition: opacity .25s; }
  .menu-backdrop.open { opacity: 1; pointer-events: auto; }
  .author-card { padding: 26px; }
  .pub-item { padding: 22px 22px 22px 22px; }
  .pub-item::before { position: static; display: block; margin-bottom: 6px; font-size: 16px; }
}