/* ============================================================
   DESIGN TOKENS
   ============================================================ */
:root {
  --bg:          #FAFAF8;
  --bg-alt:      #F2F2EF;
  --surface:     #E8E8E4;
  --text:        #1A1A18;
  --text-muted:  #767672;
  --accent:      #4A6A7A;
  --border:      #E0E0DC;
  --border-mid:  #CECECA;

  --font-serif: 'Cormorant Garamond', Georgia, serif;
  --font-sans:  'Inter', system-ui, sans-serif;
  --max-width:  920px;
}

/* ============================================================
   RESET + BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--accent); text-decoration: none; transition: opacity 0.15s; }
a:hover { opacity: 0.75; }

ul { list-style: none; }

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin-block: 2.5rem;
}

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 2rem;
}

section {
  padding-block: 3rem;
}

section.alt {
  background: var(--bg-alt);
}

/* ============================================================
   NAVIGATION
   ============================================================ */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  height: 3.25rem;
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.01em;
  flex-shrink: 0;
}
.nav-logo:hover { opacity: 1; color: var(--accent); }

#nav-toggle { display: none; }

.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2rem;
  height: 2rem;
  cursor: pointer;
  margin-left: auto;
  flex-shrink: 0;
}
.nav-hamburger span {
  display: block;
  height: 1px;
  background: var(--text-muted);
  border-radius: 1px;
  transition: transform 0.2s, opacity 0.2s;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.125rem;
  margin-left: auto;
}

.nav-links a {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 0.375rem 0.75rem;
  letter-spacing: 0.01em;
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--text); opacity: 1; }

.nav-links .nav-cta {
  color: var(--accent);
  border: 1px solid var(--border-mid);
  border-radius: 2px;
  margin-left: 0.5rem;
}
.nav-links .nav-cta:hover { border-color: var(--accent); color: var(--accent); opacity: 1; }

/* ============================================================
   HERO / ABOUT
   ============================================================ */
#about {
  padding-block: 4rem 3rem;
}

.hero {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 3rem;
  align-items: start;
}

.hero-photo {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--border-mid);
  filter: grayscale(20%);
}

.hero-photo-placeholder {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border-mid);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: -1px;
}

.hero-body {}

.hero-name {
  font-family: var(--font-serif);
  font-size: 2.75rem;
  font-weight: 600;
  letter-spacing: -0.5px;
  line-height: 1.1;
  color: #3A3A36;
  margin-bottom: 0.375rem;
}

.hero-role {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0.125rem;
  letter-spacing: 0.01em;
}

.hero-inst {
  font-size: 0.875rem;
  color: var(--accent);
  margin-bottom: 1.5rem;
  letter-spacing: 0.01em;
}

.hero-bio {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

/* ============================================================
   SECTION HEADING
   ============================================================ */
.section-eyebrow {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
  display: block;
}

.section-eyebrow-lg {
  font-size: 0.9375rem;
  letter-spacing: 0.08em;
  margin-bottom: 1.5rem;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 600;
  letter-spacing: -0.25px;
  color: var(--text);
  line-height: 1.15;
  margin-bottom: 0.5rem;
}

.section-intro {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 100%;
  margin-bottom: 3rem;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  padding: 0.5rem 1.125rem;
  border-radius: 2px;
  cursor: pointer;
  transition: opacity 0.15s, background 0.15s, color 0.15s, border-color 0.15s;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #FFFFFF;
  font-weight: 600;
}
.btn-primary:hover { opacity: 0.85; color: #FFFFFF; }

.btn-outline {
  border: 1px solid var(--border-mid);
  color: var(--text-muted);
  background: transparent;
}
.btn-outline:hover { border-color: var(--text-muted); color: var(--text); opacity: 1; }

.btn-ghost {
  color: var(--accent);
  padding-left: 0;
  padding-right: 0;
  letter-spacing: 0.04em;
  font-size: 0.8rem;
}
.btn-ghost:hover { opacity: 0.7; }

/* ============================================================
   RESEARCH SECTION
   ============================================================ */
.research-areas {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.9;
  margin-bottom: 3rem;
}

.research-areas strong {
  color: var(--text);
  font-weight: 500;
}

.project-block {
  border-top: 1px solid var(--border-mid);
  padding-top: 2rem;
}

.project-block-label {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.625rem;
}

.project-block-title {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.375rem;
}

.project-block-meta {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.project-block-body {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 540px;
  margin-bottom: 1.25rem;
}

/* ============================================================
   PUBLICATIONS
   ============================================================ */
.pub-list { display: flex; flex-direction: column; }

.pub-year-group {
  border-top: 1px solid var(--border);
  padding-top: 2rem;
  margin-bottom: 2rem;
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 1rem 2rem;
}

.pub-year {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding-top: 0.1em;
}

.pub-items {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.pub-item {}

.pub-title {
  font-size: 0.9375rem;
  color: var(--text);
  line-height: 1.5;
  margin-bottom: 0.2rem;
}

.pub-venue {
  font-size: 0.8375rem;
  color: var(--text-muted);
  line-height: 1.5;
}
.pub-venue em { font-style: italic; }

.pub-authors {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.1rem;
}

.pub-links-row {
  display: flex;
  gap: 0.875rem;
  margin-top: 0.4rem;
}

.pub-link {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: rgba(184,151,90,0.4);
}
.pub-link:hover { opacity: 1; text-decoration-color: var(--accent); }

.pub-note {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-style: italic;
  margin-top: 0.1rem;
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-rows {
  display: flex;
  flex-direction: column;
}

.contact-row {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 1rem;
  padding-block: 1.25rem;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
}
.contact-row:last-child { border-bottom: 1px solid var(--border); }

.contact-row-label {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding-top: 0.15em;
}

.contact-row-value {
  color: var(--text);
  line-height: 1.6;
}

.contact-row-value a { color: var(--accent); }
.contact-row-value p { font-size: 0.8375rem; color: var(--text-muted); margin-top: 0.125rem; }

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding-block: 2.5rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-name {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.2rem;
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.footer-links a {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.01em;
}
.footer-links a:hover { color: var(--text); opacity: 1; }

/* ============================================================
   PROJECT PAGE
   ============================================================ */
.project-hero {
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  padding-block: 5rem 4rem;
}

.project-hero .section-title {
  font-size: 2.5rem;
  margin-bottom: 2rem;
}

.project-hero-body {
  font-size: 0.9375rem;
  color: var(--text-muted);
  max-width: 100%;
  line-height: 1.75;
  margin-bottom: 1rem;
}

.funding-strip {
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border-mid);
}

.funding-stat-value {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 600;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.funding-stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Themes */
.themes-list {
  display: flex;
  flex-direction: column;
}

.theme-item {
  padding-block: 1.75rem;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 2rem;
  align-items: start;
}
.theme-item:last-child { border-bottom: 1px solid var(--border); }

.theme-num {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--border-mid);
  line-height: 1;
}

.theme-title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.theme-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.75;
}

/* Postdoc */
.postdoc-details {
  border-top: 1px solid var(--border);
  padding-top: 2.5rem;
  margin-top: 2.5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem 3rem;
  margin-bottom: 2.5rem;
}

.detail-label {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.375rem;
}

.detail-value {
  font-size: 0.9375rem;
  color: var(--text);
}

/* Timeline */
.phase-list {
  display: flex;
  flex-direction: column;
  padding-left: 1.5rem;
  border-left: 1px solid var(--border);
  gap: 2.5rem;
  margin-left: 0.5rem;
}

.phase-item { position: relative; }

.phase-item::before {
  content: '';
  position: absolute;
  left: -1.625rem;
  top: 0.45rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-alt);
}

.phase-label {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.375rem;
}

.phase-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.375rem;
}

.phase-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* People */
.people-grid {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.person-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.75rem;
  padding: 1.75rem 2rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  min-width: 180px;
}

.person-card.open {
  border-style: dashed;
  border-color: var(--border-mid);
}

.person-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border-mid);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-muted);
}

.person-name {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.person-role {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ============================================================
   RESPONSIVE — 640px nav
   ============================================================ */
@media (max-width: 640px) {
  .nav-hamburger { display: flex; }

  .nav-inner { flex-wrap: wrap; height: auto; padding-block: 0.75rem; }

  .nav-links {
    display: none;
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    padding-bottom: 0.75rem;
    gap: 0;
  }

  .nav-links .nav-cta { margin-left: 0; margin-top: 0.5rem; }

  #nav-toggle:checked ~ .nav-links { display: flex; }
  #nav-toggle:checked ~ label.nav-hamburger span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  #nav-toggle:checked ~ label.nav-hamburger span:nth-child(2) { opacity: 0; }
  #nav-toggle:checked ~ label.nav-hamburger span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
}

/* ============================================================
   RESPONSIVE — 600px layout
   ============================================================ */
@media (max-width: 600px) {
  section { padding-block: 2rem; }
  #about { padding-block: 2.5rem 2rem; }

  .hero { grid-template-columns: 1fr; gap: 2rem; }
  .hero-photo, .hero-photo-placeholder { width: 100px; height: 100px; }
  .hero-name { font-size: 2.25rem; }

  .pub-year-group { grid-template-columns: 1fr; gap: 0.75rem; }
  .pub-year { padding-top: 0; }

  .contact-row { grid-template-columns: 1fr; gap: 0.25rem; }

  .theme-item { grid-template-columns: 1fr; gap: 0.5rem; }
  .theme-num { font-size: 1.5rem; }

  .postdoc-details { grid-template-columns: 1fr; gap: 1.25rem; }

  .project-hero .section-title { font-size: 1.875rem; }
  .project-hero-body { font-size: 0.875rem; }
}

/* ============================================================
   PLACEHOLDER TEXT (edit before publishing)
   ============================================================ */
.edit-me {
  color: var(--text-muted);
  font-style: italic;
  border: 1px dashed var(--border-mid);
  padding: 0.75rem 1rem;
  border-radius: 2px;
  font-size: 0.875rem;
  line-height: 1.7;
}