/* ═══════════════════════════════════════════════════════════════
   Charlotte Eisvogel — Academic Website Stylesheet
   Fonts: Cormorant Garamond (display) + DM Sans (body)
   Palette: Off-white background · Near-black text · Stone accent
═══════════════════════════════════════════════════════════════ */

/* ── Variables ─────────────────────────────────────────── */
:root {
  --bg:          #f8f6f1;       /* warm off-white */
  --bg-alt:      #f0ede6;       /* slightly darker for hover/fields */
  --ink:         #1a1816;       /* near-black */
  --ink-mid:     #4a4540;       /* muted text */
  --ink-light:   #7a756d;       /* very muted / meta */
  --accent:      #2d5a3d;       /* deep forest green — professional, distinctive */
  --accent-soft: #e8f0ea;       /* light green tint for hovers */
  --border:      #dedad3;       /* subtle warm border */
  --max-w:       1100px;
  --side-pad:    clamp(1.5rem, 5vw, 4rem);
  --font-serif:  'Cormorant Garamond', Georgia, serif;
  --font-sans:   'DM Sans', system-ui, sans-serif;
}

/* ── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-weight: 300;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Typography ─────────────────────────────────────────── */
h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s, opacity 0.2s;
}
a:hover { opacity: 0.7; }

/* ── Navigation ─────────────────────────────────────────── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--side-pad);
  height: 60px;
}

.nav-name {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 400;
  letter-spacing: 0.01em;
  color: var(--ink);
}

nav ul {
  list-style: none;
  display: flex;
  gap: 2.5rem;
}

nav ul li a {
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mid);
  padding-bottom: 2px;
  border-bottom: 1.5px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

nav ul li a:hover,
nav ul li a.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  opacity: 1;
}

/* ── Main wrapper ───────────────────────────────────────── */
main {
  flex: 1;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--side-pad);
  width: 100%;
}

/* ══════════════════════════════════════════════════════════
   ABOUT / HERO PAGE
══════════════════════════════════════════════════════════ */
.hero {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 4rem;
  align-items: start;
  padding: 5rem 0 4rem;
}

/* Hero text */
.position {
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-light);
  margin-bottom: 0.9rem;
}

.hero h1 {
  font-size: clamp(3.5rem, 6vw, 5.5rem);
  font-weight: 300;
  color: var(--ink);
  margin-bottom: 1.2rem;
  line-height: 1.0;
  font-style: italic;
}

.affiliation {
  font-family: var(--font-sans);
  font-size: 0.88rem;
  color: var(--ink-mid);
  line-height: 1.5;
  margin-bottom: 2rem;
  padding-left: 0;
  border-left: 2px solid var(--border);
  padding-left: 0.9rem;
}

.bio {
  font-size: 0.97rem;
  color: var(--ink-mid);
  max-width: 56ch;
  margin-bottom: 1.2rem;
  line-height: 1.75;
}

.contact-links {
  margin-top: 2rem;
  font-size: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  align-items: center;
}

.contact-links a {
  color: var(--ink);
  font-weight: 400;
}

.contact-links a:hover { color: var(--accent); }

.sep {
  color: var(--border);
  user-select: none;
  padding: 0 0.2rem;
}

/* Hero image */
.hero-image {
  padding-top: 1.5rem;
}

.hero-image img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: center top;
  display: block;
  filter: grayscale(15%);
  /* Elegant frame */
  outline: 1px solid var(--border);
  outline-offset: 6px;
}

/* Placeholder when no image is loaded */
.hero-image img[src="photo.jpg"] {
  background: var(--bg-alt);
  min-height: 380px;
}

/* Fields of interest */
.fields {
  padding: 3rem 0 5rem;
  border-top: 1px solid var(--border);
}

.fields h2 {
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-light);
  margin-bottom: 1.2rem;
}

.field-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.field-list li {
  font-size: 0.85rem;
  font-weight: 400;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 0.35rem 0.85rem;
  border-radius: 2px;
  color: var(--ink-mid);
  letter-spacing: 0.02em;
}

/* ══════════════════════════════════════════════════════════
   RESEARCH PAGE
══════════════════════════════════════════════════════════ */
.page-content {
  padding: 4rem 0 6rem;
}

.page-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 300;
  font-style: italic;
  color: var(--ink);
  margin-bottom: 3rem;
}

.research-section {
  margin-bottom: 3.5rem;
}

.research-section h2 {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-light);
  margin-bottom: 2rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--border);
}

.paper {
  padding: 1.8rem 0;
  border-bottom: 1px solid var(--border);
}

.paper:last-child { border-bottom: none; }

.paper-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 400;
  margin-bottom: 0.5rem;
}

.paper-title a {
  color: var(--ink);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: border-color 0.2s, color 0.2s;
}

.paper-title a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
  opacity: 1;
}

.paper-title.no-link { color: var(--ink); }

.paper-meta {
  font-size: 0.82rem;
  color: var(--ink-light);
  margin-bottom: 0.8rem;
  line-height: 1.5;
}

.paper-meta em { font-style: italic; color: var(--ink-mid); }

.paper-status {
  font-weight: 500;
  color: var(--accent);
}

.paper-abstract {
  font-size: 0.9rem;
  color: var(--ink-mid);
  max-width: 72ch;
  line-height: 1.7;
  margin-bottom: 1rem;
}

.paper-links {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
}

.paper-links a {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  border-bottom: 1px solid var(--accent-soft);
  padding-bottom: 1px;
}

.paper-links a:hover {
  border-bottom-color: var(--accent);
  opacity: 1;
}

/* ══════════════════════════════════════════════════════════
   CV PAGE
══════════════════════════════════════════════════════════ */
.cv-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 3rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.cv-download {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--accent);
  color: #fff;
  padding: 0.55rem 1.2rem;
  border-radius: 2px;
  transition: opacity 0.2s;
}

.cv-download:hover { opacity: 0.85; }

.cv-section {
  margin-bottom: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--border);
}

.cv-section:last-child { border-bottom: none; }

.cv-section h2 {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-light);
  margin-bottom: 1.5rem;
}

.cv-entry {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 1.5rem;
  margin-bottom: 1.2rem;
}

.cv-entry:last-child { margin-bottom: 0; }

.cv-year {
  font-size: 0.82rem;
  color: var(--ink-light);
  font-weight: 400;
  padding-top: 0.15em;
  text-align: right;
}

.cv-detail {
  font-size: 0.92rem;
  color: var(--ink);
  line-height: 1.6;
}

.cv-detail strong {
  font-weight: 500;
  color: var(--ink);
}

.cv-note {
  font-size: 0.83rem;
  color: var(--ink-light);
  font-style: italic;
}

/* ── Footer ─────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem var(--side-pad);
  text-align: center;
  font-size: 0.82rem;
  color: var(--ink-light);
  line-height: 1.8;
}

footer a { color: var(--ink-light); }
footer a:hover { color: var(--accent); }

.footer-small {
  font-size: 0.75rem;
  color: var(--border);
  margin-top: 0.3rem;
}

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    padding: 3rem 0;
  }

  .hero-image {
    order: -1;
    max-width: 240px;
    padding-top: 0;
  }

  .hero h1 {
    font-size: 3rem;
  }

  .cv-entry {
    grid-template-columns: 60px 1fr;
    gap: 1rem;
  }

  nav ul { gap: 1.5rem; }

  .page-content {
    padding-left: var(--side-pad);
    padding-right: var(--side-pad);
  }
}

@media (max-width: 480px) {
  .cv-entry {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }
  .cv-year { text-align: left; }
}

@media (max-width: 1024px) {
  .page-content {
    padding-left: var(--side-pad);
    padding-right: var(--side-pad);
  }
}