/* ==========================================================================
   Martha Zillig Lab — Design System
   Palette: earthy greens/greys/blues · field-guide + quantitative aesthetic
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600;9..144,700&family=Public+Sans:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* Palette */
  --ink: #232A24;
  --ink-soft: #4A544C;
  --slate: #3B5566;
  --slate-deep: #29404E;
  --slate-mist: #7A94A0;
  --moss: #4F6B4B;
  --moss-deep: #3A4F37;
  --moss-light: #7C9974;
  --sage: #C4D0B8;
  --sage-soft: #E1E7D9;
  --stone: #EDEAE1;
  --paper: #F8F6F0;
  --paper-deep: #F1EEE4;
  --line: #D9D3C3;
  --line-deep: #C3BCA8;
  --white: #FFFDF9;

  /* Type */
  --font-display: 'Fraunces', serif;
  --font-body: 'Public Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius: 3px;
  --max-width: 1120px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--slate-deep); text-decoration: none; }
a:hover { color: var(--moss); }

:focus-visible {
  outline: 2px solid var(--moss);
  outline-offset: 3px;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--ink);
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--moss-deep);
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
}

.eyebrow::before {
  content: '';
  width: 18px;
  height: 1px;
  background: var(--moss-deep);
  display: inline-block;
}

p { margin: 0 0 1em; color: var(--ink-soft); }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------- Header / Nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(248, 246, 240, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--ink);
}

.brand:hover { color: var(--ink); }

.brand-mark { width: 26px; height: 26px; color: var(--moss); flex-shrink: 0; }

.brand-role {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--slate-mist);
  font-weight: 400;
  margin-top: 1px;
}

.nav-links {
  display: flex;
  gap: 30px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink-soft);
  padding: 6px 0;
  border-bottom: 2px solid transparent;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--moss-deep);
  border-bottom-color: var(--moss);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line-deep);
  border-radius: var(--radius);
  width: 40px;
  height: 36px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle svg { width: 18px; height: 18px; color: var(--ink); }

@media (max-width: 780px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    gap: 0;
    padding: 8px 28px 16px;
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { display: block; padding: 10px 0; border-bottom: 1px solid var(--line); }
}

/* ---------- Feather-barb divider (signature motif) ---------- */

.divider-feather {
  height: 14px;
  margin: 0;
  background-image: repeating-linear-gradient(
    115deg,
    var(--line-deep) 0px,
    var(--line-deep) 1px,
    transparent 1px,
    transparent 13px
  );
  background-position: center;
  background-size: 100% 1px;
  background-repeat: repeat-x;
  position: relative;
}

.divider-feather::after {
  content: '';
  position: absolute;
  left: 0; right: 0; top: 50%;
  height: 1px;
  background: var(--line-deep);
}

section .divider-feather,
.section-divider {
  margin: 0 auto;
  max-width: var(--max-width);
}

/* ---------- Hero ---------- */

.hero {
  padding: 76px 0 64px;
  position: relative;
  overflow: hidden;
}

.hero .container {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2.3rem, 4vw, 3.4rem);
  line-height: 1.08;
  margin: 0.4em 0 0.5em;
}

.hero h1 em {
  font-style: italic;
  color: var(--moss-deep);
}

.hero-sub {
  font-size: 1.08rem;
  max-width: 46ch;
  color: var(--ink-soft);
}

.hero-cta {
  display: flex;
  gap: 14px;
  margin-top: 28px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.88rem;
  padding: 12px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--moss-deep);
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease;
}

.btn-primary {
  background: var(--moss-deep);
  color: var(--white);
}
.btn-primary:hover { background: var(--moss); color: var(--white); transform: translateY(-1px); }

.btn-ghost {
  background: transparent;
  color: var(--moss-deep);
}
.btn-ghost:hover { background: var(--sage-soft); transform: translateY(-1px); }

/* Specimen plate — hero visual */

.specimen-plate {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  position: relative;
  box-shadow: 0 24px 48px -24px rgba(41, 64, 78, 0.28);
}

.specimen-plate .plate-photo {
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
  border-radius: 2px;
  background: var(--stone);
}

.plate-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-soft);
  border-top: 1px dashed var(--line-deep);
  margin-top: 14px;
  padding-top: 10px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.plate-corner {
  position: absolute;
  top: -10px;
  right: 20px;
  background: var(--moss-deep);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  padding: 5px 10px;
  border-radius: 2px;
}

/* ---------- Stats bar ---------- */

.stats-bar {
  background: var(--slate-deep);
  color: var(--white);
  padding: 30px 0;
}

.stats-bar .container {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  justify-content: space-between;
}

.stat {
  flex: 1 1 160px;
}

.stat .num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 600;
  color: var(--sage);
  display: block;
}

.stat .label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #C7D3D8;
}

/* ---------- Generic section ---------- */

.section {
  padding: 64px 0;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.section-head h2 {
  font-size: clamp(1.6rem, 2.4vw, 2.1rem);
  margin-top: 0.3em;
}

.section-head .lede {
  max-width: 56ch;
  color: var(--ink-soft);
}

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

.link-arrow {
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
}

/* ---------- Research / project cards ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

@media (max-width: 900px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .card-grid { grid-template-columns: 1fr; }
}

.project-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.project-card:hover {
  border-color: var(--moss);
  transform: translateY(-2px);
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--sage-soft);
  color: var(--moss-deep);
  padding: 4px 8px;
  border-radius: 2px;
}

.accession {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--slate-mist);
}

.project-card h3 {
  font-size: 1.15rem;
  margin: 4px 0 2px;
}

.project-card p { font-size: 0.92rem; margin-bottom: 4px; }

.card-link {
  margin-top: auto;
  font-weight: 600;
  font-size: 0.86rem;
  color: var(--slate-deep);
}

/* ---------- Publications ---------- */

.pub-year {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--moss-deep);
  border-bottom: 1px solid var(--line);
  padding-bottom: 6px;
  margin: 40px 0 18px;
  letter-spacing: 0.04em;
}
.pub-year:first-of-type { margin-top: 0; }

.pub-entry {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: start;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.pub-entry .pub-authors { font-size: 0.95rem; color: var(--ink); margin-bottom: 2px; }
.pub-entry .pub-title { font-weight: 600; color: var(--ink); margin-bottom: 2px; }
.pub-entry .pub-venue { font-style: italic; color: var(--ink-soft); font-size: 0.9rem; margin-bottom: 0; }

.pub-links {
  display: flex;
  gap: 10px;
  white-space: nowrap;
  align-self: center;
}

.pub-links a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  border: 1px solid var(--line-deep);
  padding: 6px 10px;
  border-radius: var(--radius);
  color: var(--slate-deep);
}
.pub-links a:hover { background: var(--sage-soft); border-color: var(--moss); }

/* ---------- About / bio ---------- */

.about-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 48px;
  align-items: start;
}

@media (max-width: 780px) {
  .about-grid { grid-template-columns: 1fr; }
  .hero .container { grid-template-columns: 1fr; }
  .hero { padding-top: 48px; }
}

.about-photo {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--stone);
}

.about-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.about-links a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  border: 1px solid var(--line-deep);
  padding: 7px 12px;
  border-radius: var(--radius);
}
.about-links a:hover { background: var(--sage-soft); border-color: var(--moss); }

/* ---------- People page ---------- */

.people-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
@media (max-width: 900px) { .people-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .people-grid { grid-template-columns: 1fr; } }

.person-card { text-align: left; }

.person-photo {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius);
  background: var(--stone);
  border: 1px solid var(--line);
  margin-bottom: 12px;
}

.person-card h3 { font-size: 1.05rem; margin-bottom: 0; }
.person-role {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--moss-deep);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.person-card p { font-size: 0.88rem; margin: 8px 0 0; }

/* ---------- CV page ---------- */

.cv-section { margin-bottom: 40px; }
.cv-section h2 {
  font-size: 1.3rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
  margin-bottom: 18px;
}

.cv-entry {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 18px;
  margin-bottom: 16px;
}

.cv-entry .cv-date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--slate-mist);
  padding-top: 2px;
}

.cv-entry .cv-title { font-weight: 600; margin-bottom: 2px; }
.cv-entry .cv-detail { font-size: 0.92rem; color: var(--ink-soft); margin-bottom: 0; }

@media (max-width: 600px) {
  .cv-entry { grid-template-columns: 1fr; gap: 4px; }
}

/* ---------- Links page ---------- */

.links-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
@media (max-width: 700px) { .links-grid { grid-template-columns: 1fr; } }

.link-item {
  display: flex;
  gap: 14px;
  padding: 18px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.link-item:hover { border-color: var(--moss); }

.link-icon {
  width: 22px; height: 22px; flex-shrink: 0; color: var(--moss-deep); margin-top: 2px;
}

.link-item h3 { font-size: 1rem; margin-bottom: 2px; }
.link-item p { font-size: 0.85rem; margin: 0; }

/* ---------- Footer ---------- */

.site-footer {
  background: var(--slate-deep);
  color: #D6DEE0;
  padding: 44px 0 28px;
  margin-top: 40px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}

.footer-brand {
  font-family: var(--font-display);
  color: var(--white);
  font-size: 1.15rem;
  font-weight: 600;
}

.footer-tagline {
  font-size: 0.85rem;
  color: #A9BDC4;
  margin-top: 4px;
}

.footer-links {
  display: flex;
  gap: 20px;
  list-style: none;
  padding: 0;
  margin: 0;
  flex-wrap: wrap;
}

.footer-links a { color: #D6DEE0; font-size: 0.85rem; }
.footer-links a:hover { color: var(--sage); }

.footer-bottom {
  padding-top: 18px;
  font-size: 0.78rem;
  color: #8CA2A9;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- Page header (non-home pages) ---------- */

.page-header {
  padding: 52px 0 40px;
}

.page-header h1 {
  font-size: clamp(2rem, 3.4vw, 2.7rem);
  margin-top: 0.35em;
}

.page-header .lede {
  max-width: 60ch;
  font-size: 1.02rem;
}

/* ---------- Utility ---------- */

.mt-0 { margin-top: 0; }
.text-center { text-align: center; }
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}