:root {
  --paper: #eef1f3;
  --paper-soft: #f4f6f7;
  --ink: #20262c;
  --slate: #4c5860;
  --muted: #727d85;
  --line: rgba(32, 38, 44, 0.14);
  --copper: #6b2737;
  --bg-art: url('/deep-fallibility-blue.png');
  --panel: rgba(244, 246, 247, 0.9);
  --panel-strong: rgba(224, 228, 230, 0.9);
  --footer-bg: #171d23;
  --footer-ink: #e7ebee;
  --footer-link: #aab4bb;
  --toggle-ink: var(--ink);
}

:root[data-theme='dark'] {
  --paper: #141b24;
  --paper-soft: #1a222c;
  --ink: #dfe6ec;
  --slate: #b7c2ca;
  --muted: #8b98a3;
  --line: rgba(223, 230, 236, 0.14);
  --copper: #d98fa0;
  --bg-art: url('/deep-fallibility-dark.png');
  --panel: rgba(26, 34, 44, 0.9);
  --panel-strong: rgba(32, 42, 54, 0.9);
  --footer-bg: #0c1116;
  --footer-ink: #e7ebee;
  --footer-link: #93a0aa;
  --toggle-ink: var(--ink);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  text-rendering: optimizeLegibility;
  position: relative;
  transition: background-color 0.25s ease, color 0.25s ease;
}
a { color: inherit; }

.site-header {
  position: absolute;
  z-index: 10;
  top: 0;
  left: 0;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 30px clamp(24px, 7vw, 110px);
  border-bottom: 1px solid var(--line);
}
.wordmark { font-family: Georgia, "Times New Roman", serif; font-size: 30px; text-decoration: none; letter-spacing: -0.02em; color: var(--ink); }
.site-header nav { display: flex; align-items: center; gap: clamp(18px, 2.4vw, 38px); }
.site-header nav a { font-size: 12px; font-weight: 600; letter-spacing: 0.055em; text-decoration: none; text-transform: uppercase; }
.site-header nav a:not(.nav-cv) { color: var(--slate); }
.nav-cv { border: 1px solid var(--line); border-radius: 999px; padding: 10px 15px; }
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  margin-left: clamp(6px, 1vw, 14px);
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--toggle-ink);
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}
.theme-toggle:hover { background: var(--line); }
.theme-toggle:focus-visible { outline: 2px solid var(--copper); outline-offset: 2px; }
.theme-toggle-icon { display: none; }
:root:not([data-theme='dark']) .theme-toggle-icon--dark { display: inline; }
:root[data-theme='dark'] .theme-toggle-icon--light { display: inline; }

.sticky-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px clamp(24px, 7vw, 110px);
  background: var(--paper-soft);
  box-shadow: 0 1px 0 var(--line), 0 8px 20px -12px rgba(0, 0, 0, 0.25);
  opacity: 0;
  transform: translateY(-100%);
  transition: opacity 0.25s ease, transform 0.25s ease;
  pointer-events: none;
}
.sticky-bar.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.sticky-bar .wordmark { font-size: 19px; }
.sticky-bar nav { display: flex; align-items: center; gap: clamp(14px, 2vw, 30px); }
.sticky-bar nav a { font-size: 11px; font-weight: 600; letter-spacing: 0.055em; text-decoration: none; text-transform: uppercase; color: var(--slate); }
.sticky-bar nav a.nav-cv { color: var(--ink); border: 1px solid var(--line); border-radius: 999px; padding: 7px 13px; }
.sticky-bar .theme-toggle { width: 28px; height: 28px; font-size: 13px; }

.hero {
  position: relative;
  overflow: hidden;
  padding: 150px clamp(24px, 7vw, 110px) 80px;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1.35fr 0.65fr;
  gap: clamp(40px, 6vw, 90px);
  align-items: start;
}
.hero-art {
  display: none;
}
.hero-copy { position: relative; z-index: 2; padding-top: 22px; }
.section-kicker { margin: 0 0 20px; color: var(--copper); font-size: 13px; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase; }
h1, h2 { font-family: Georgia, "Times New Roman", serif; font-weight: 400; }
.bio-line { max-width: 620px; margin: 0 0 16px; color: var(--ink); font-size: 15px; line-height: 1.7; }
.bio-line a { text-decoration-color: var(--line); text-underline-offset: 3px; }
.bio-line:last-of-type { margin-bottom: 0; }
.bio-contact { margin-top: 22px; color: var(--muted); font-size: 13px; }
.portrait {
  position: relative;
  z-index: 2;
  justify-self: end;
  width: clamp(180px, 20vw, 260px);
  aspect-ratio: 4 / 5;
  overflow: hidden;
  border-radius: 4px;
  border: 1px solid var(--line);
}
.portrait img { width: 100%; height: 100%; object-fit: cover; display: block; }

.research-preview {
  position: relative;
  display: grid;
  grid-template-columns: .85fr 1.25fr;
  gap: clamp(50px, 10vw, 155px);
  padding: 100px clamp(24px, 7vw, 110px);
  overflow: hidden;
}
.research-preview::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, var(--paper) 0%, color-mix(in srgb, var(--paper) 68%, transparent) 45%, var(--paper) 100%),
    var(--bg-art) center / cover no-repeat;
  transform: scaleX(-1);
}
.research-preview > * { position: relative; z-index: 1; }
.project { display: grid; grid-template-columns: 46px 1fr; gap: 24px; padding: 5px 0 46px; border-top: 1px solid var(--line); }
.project + .project { padding-top: 44px; }
.project-number { padding-top: 7px; color: var(--copper); font-size: 11px; font-weight: 700; letter-spacing: .14em; }
.project h3 { margin: 0 0 14px; font-family: Georgia, "Times New Roman", serif; font-size: clamp(19px, 1.8vw, 24px); font-weight: 400; letter-spacing: -.02em; }
.project p { max-width: 650px; margin: 0; color: var(--ink); font-size: 15px; line-height: 1.7; }

.inline-download { display: inline-flex; gap: 14px; margin-top: 32px; border-bottom: 1px solid var(--line); padding-bottom: 8px; color: var(--slate); font-size: 12px; font-weight: 700; letter-spacing: .05em; text-decoration: none; text-transform: uppercase; }
.inline-download span { color: var(--copper); }

.publication-section { padding: 90px clamp(24px, 7vw, 110px); background: var(--panel); color: var(--ink); }
.publication-head { margin-bottom: 40px; }
.publication-list { border-top: 1px solid var(--line); }
.publication-row { display: grid; grid-template-columns: 70px minmax(0, 1fr) auto; gap: 34px; align-items: start; padding: 28px 0; border-bottom: 1px solid var(--line); }
.publication-year { padding-top: 4px; color: var(--muted); font-size: 11px; letter-spacing: .12em; }
.publication-main h3 { margin: 0; font-family: Georgia, "Times New Roman", serif; font-size: clamp(19px, 1.8vw, 24px); font-weight: 400; line-height: 1.25; }
.venue { margin: 6px 0 0; color: var(--slate); font-family: Georgia, "Times New Roman", serif; font-size: 14px; font-style: italic; }
.publication-note { max-width: 640px; margin: 12px 0 0; color: var(--slate); font-size: 14.5px; line-height: 1.7; }
.publication-links { display: flex; gap: 18px; padding-top: 4px; }
.publication-links a, .file-link { color: var(--slate); font-size: 10px; font-weight: 700; letter-spacing: .08em; text-decoration: none; text-transform: uppercase; }
.publication-links a span, .file-link span { color: var(--copper); }

.teaching-section { display: grid; grid-template-columns: .92fr 1.08fr; gap: clamp(60px, 10vw, 150px); padding: 100px clamp(24px, 7vw, 110px); background: var(--panel-strong); }
.teaching-links { display: flex; flex-wrap: wrap; gap: 25px; margin-top: 4px; }
.teaching-links .file-link { color: var(--slate); border-bottom: 1px solid var(--line); padding-bottom: 8px; }
.course-groups { border-top: 1px solid var(--line); }
.course-group { display: grid; grid-template-columns: 160px 1fr; gap: 30px; padding: 30px 0 34px; border-bottom: 1px solid var(--line); }
.course-group > p { margin: 4px 0 0; color: var(--copper); font-size: 10px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.course-group ul { display: grid; gap: 14px; margin: 0; padding: 0; list-style: none; }
.course-group li { font-family: Georgia, "Times New Roman", serif; font-size: 16px; line-height: 1.3; }

.conference-section { display: grid; grid-template-columns: .92fr 1.08fr; gap: clamp(60px, 10vw, 150px); padding: 80px clamp(24px, 7vw, 110px); border-top: 1px solid var(--line); }
.conference-list { display: grid; gap: 0; }
.conference-row { padding: 22px 0; border-bottom: 1px solid var(--line); }
.conference-row:first-child { padding-top: 0; }
.conference-row h3 { margin: 0; font-family: Georgia, "Times New Roman", serif; font-size: 19px; font-weight: 400; line-height: 1.3; }
.conference-row h3 a { text-decoration-color: var(--line); text-underline-offset: 3px; }
.conference-place { margin: 6px 0 0; color: var(--slate); font-size: 13px; }
.conference-note { margin: 6px 0 0; color: var(--slate); font-size: 13px; line-height: 1.6; }

.cv-section { padding: 80px clamp(24px, 7vw, 110px); background: var(--panel); border-top: 1px solid var(--line); }
.cv-card { display: flex; align-items: center; gap: 30px; flex-wrap: wrap; }
.primary-action { border-radius: 999px; background: var(--ink); color: var(--paper); padding: 15px 22px; font-size: 13px; font-weight: 650; text-decoration: none; display: inline-block; }

footer { display: grid; grid-template-columns: 1fr auto; gap: 28px 50px; padding: 50px clamp(24px, 7vw, 110px); background: var(--footer-bg); color: var(--footer-ink); align-items: center; }
.footer-name { font-family: Georgia, "Times New Roman", serif; font-size: clamp(20px, 2vw, 26px); }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 24px; }
.footer-links a { color: var(--footer-link); font-size: 10px; font-weight: 700; letter-spacing: .08em; text-decoration: none; text-transform: uppercase; }

@media (max-width: 840px) {
  .site-header nav a:not(.nav-cv) { display: none; }
  .hero { grid-template-columns: 1fr; padding-top: 130px; }
  .portrait { justify-self: start; margin-top: 30px; }
  .research-preview, .teaching-section, .conference-section { grid-template-columns: 1fr; }
  .research-preview { padding-top: 70px; }
  .publication-row { grid-template-columns: 52px 1fr; }
  .publication-links { grid-column: 2; }
}

@media (max-width: 520px) {
  .site-header { padding: 23px 20px; }
  .hero { padding-inline: 20px; }
  .project { grid-template-columns: 32px 1fr; gap: 14px; }
  .publication-section, .teaching-section, .conference-section, .cv-section { padding-inline: 20px; }
  .publication-row { grid-template-columns: 1fr; gap: 12px; }
  .publication-year, .publication-links { grid-column: 1; }
  .course-group { grid-template-columns: 1fr; gap: 18px; }
  footer { grid-template-columns: 1fr; padding-inline: 20px; }
  .footer-links { justify-content: flex-start; }
}