/* =========================================================
   Phantom Grad Lab — Shared Stylesheet
   ========================================================= */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ---------- Design Tokens ---------- */
:root {
  --bg:           #F5F0E8;
  --surface:      #EDE8DC;
  --surface-2:    #E5DFD1;
  --border:       #D4CCBA;
  --text:         #1A1A1A;
  --text-muted:   #5C5750;
  --accent:       #2D2D2D;
  --nav-height:   60px;
  --max-w:        920px;
  --radius:       6px;
  --gap:          1.5rem;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 3px;
}
a:hover { color: var(--accent); }

h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.25;
  color: var(--accent);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.45rem; margin-bottom: 1.25rem; }
h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }
h4 { font-size: 0.95rem; font-weight: 500; }

p { margin-bottom: 0.9rem; }
p:last-child { margin-bottom: 0; }

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

/* ---------- Layout ---------- */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 3.5rem 0;
}

.section + .section {
  border-top: 1px solid var(--border);
}

.section-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  display: flex;
  align-items: center;
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav-logo {
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--accent);
  white-space: nowrap;
  flex-shrink: 0;
}
.nav-logo:hover { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.1rem;
  list-style: none;
  flex-wrap: nowrap;
}

.nav-links a {
  font-size: 0.82rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--text-muted);
  padding: 0.3rem 0.55rem;
  border-radius: var(--radius);
  transition: color 0.15s, background 0.15s;
  white-space: nowrap;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  background: var(--surface);
}

.nav-substack {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.8rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--text-muted);
  padding: 0.3rem 0.55rem;
  border-radius: var(--radius);
  transition: color 0.15s, background 0.15s;
  flex-shrink: 0;
}
.nav-substack:hover { color: var(--accent); background: var(--surface); }

/* Hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.3rem;
  color: var(--accent);
}
.nav-toggle svg { display: block; }

/* Page offset for fixed nav */
.page-body { padding-top: var(--nav-height); }

/* ---------- Hero / Page Header ---------- */
.page-header {
  padding: 3rem 0 2rem;
  border-bottom: 1px solid var(--border);
}
.page-header h1 { margin-bottom: 0.5rem; }
.page-header .lead {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 600px;
}

/* ---------- Cards ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.4rem;
}

/* Publication card */
.pub-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.3rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.pub-card.hidden { display: none; }

.pub-title {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
}
.pub-title a { text-decoration: none; }
.pub-title a:hover { text-decoration: underline; }

.pub-authors {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.pub-venue {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-style: italic;
}

.pub-badges { display: flex; gap: 0.4rem; flex-wrap: wrap; margin-top: 0.1rem; }

.pub-links {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.2rem;
}
.pub-link {
  font-size: 0.75rem;
  font-weight: 500;
  text-decoration: none;
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--bg);
  color: var(--text-muted);
  transition: border-color 0.15s, color 0.15s;
}
.pub-link:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Badges ---------- */
.badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 0.15rem 0.55rem;
  border-radius: 3px;
}
.badge-award {
  background: #1A1A1A;
  color: #F5F0E8;
}
.badge-ongoing {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--accent);
}
.badge-completed {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.badge-preprint {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-weight: 500;
}

/* ---------- Filter Bar (Publications) ---------- */
.filter-bar {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-bottom: 1.75rem;
  position: sticky;
  top: var(--nav-height);
  background: var(--bg);
  padding: 0.75rem 0;
  z-index: 50;
  border-bottom: 1px solid var(--border);
}

.filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
}

.filter-group-status .filter-btn {
  font-size: 0.73rem;
}

.filter-group-status .filter-btn.active {
  background: var(--text-muted);
  color: var(--bg);
  border-color: var(--text-muted);
}

.filter-group-topic .filter-btn.active {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}

.filter-btn {
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.3rem 0.75rem;
  border-radius: 3px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.filter-btn:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Publication Grid ---------- */
.pub-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* ---------- Theme Cards ---------- */
.theme-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.75rem;
}

.theme-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
}
.theme-card h3 { font-size: 0.9rem; margin-bottom: 0.25rem; }
.theme-card p { font-size: 0.82rem; color: var(--text-muted); margin: 0; }
.theme-card.aspirational {
  background: var(--bg);
  border-style: dashed;
}
.theme-card.aspirational h3 { color: var(--text-muted); }

/* ---------- Project Cards ---------- */
.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.4rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem 1rem;
}
.project-card h3 { font-size: 0.95rem; grid-column: 1; }
.project-meta {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.1rem;
}
.project-desc {
  grid-column: 1 / -1;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.1rem;
}
.project-badge { grid-column: 2; grid-row: 1; align-self: start; justify-self: end; }

/* ---------- Stats Strip ---------- */
.stats-strip {
  display: flex;
  gap: 2.5rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin: 2rem 0;
  flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}
.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ---------- Logo Grid ---------- */
.logo-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2rem;
  align-items: center;
}
.logo-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  text-align: center;
}
.logo-item img {
  height: 36px;
  width: auto;
  max-width: 120px;
  object-fit: contain;
  filter: grayscale(1) opacity(0.65);
  transition: filter 0.2s;
}
.logo-item:hover img { filter: grayscale(0) opacity(1); }
.logo-item span {
  font-size: 0.72rem;
  color: var(--text-muted);
  max-width: 110px;
  line-height: 1.3;
}

/* ---------- People / Photo Grid ---------- */
.people-section-title {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1rem;
  margin-top: 2rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}
.people-section-title:first-of-type { margin-top: 0; }

.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 1.25rem;
}

.person-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  text-align: center;
}

.person-photo {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--surface-2);
  border: 2px solid var(--border);
}

.person-name {
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.3;
}

.person-affil {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.3;
}

.person-link {
  font-size: 0.72rem;
  text-decoration: none;
  color: var(--text-muted);
}
.person-link:hover { color: var(--accent); }

/* Director card */
.director-card {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  margin-bottom: 2.5rem;
}
.director-photo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 2px solid var(--border);
}
.director-info h2 { margin-bottom: 0.2rem; font-size: 1.3rem; }
.director-role {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}
.director-bio { font-size: 0.88rem; margin-bottom: 0.75rem; }
.director-links {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}
.director-links a {
  font-size: 0.78rem;
  font-weight: 500;
  text-decoration: none;
  padding: 0.25rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text-muted);
  transition: all 0.15s;
}
.director-links a:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Consultancy Cards ---------- */
.client-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 0.9rem;
}
.client-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.3rem 1.4rem;
  display: flex;
  gap: 1.2rem;
  align-items: flex-start;
}
.client-logo {
  width: 52px;
  height: 52px;
  object-fit: contain;
  flex-shrink: 0;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--bg);
  padding: 6px;
}
.client-logo-placeholder {
  width: 52px;
  height: 52px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-muted);
  flex-shrink: 0;
  text-align: center;
  line-height: 1.2;
  padding: 4px;
}
.client-info h3 { font-size: 0.95rem; margin-bottom: 0.2rem; }
.client-project { font-size: 0.82rem; font-weight: 500; color: var(--text-muted); margin-bottom: 0.3rem; }
.client-desc { font-size: 0.82rem; color: var(--text-muted); margin: 0; }

/* ---------- Startup Card ---------- */
.startup-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 2rem;
  max-width: 520px;
}
.startup-card h3 { font-size: 1.05rem; margin-bottom: 0.3rem; }
.startup-type {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}
.startup-desc { font-size: 0.88rem; color: var(--text-muted); }

/* ---------- News ---------- */
.news-list { display: flex; flex-direction: column; }
.news-item {
  display: grid;
  grid-template-columns: 90px 1fr auto;
  gap: 0.5rem 1.2rem;
  align-items: baseline;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
}
.news-item:first-child { border-top: 1px solid var(--border); }
.news-date {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
  white-space: nowrap;
}
.news-text { font-size: 0.88rem; }
.news-link {
  font-size: 0.78rem;
  font-weight: 500;
  white-space: nowrap;
  text-decoration: none;
  color: var(--text-muted);
}
.news-link:hover { color: var(--accent); }

/* ---------- Connect Page ---------- */
.connect-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  margin-bottom: 1.5rem;
}
.connect-box h3 { margin-bottom: 0.75rem; }
.email-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1rem;
}
.email-label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  min-width: 90px;
}
.email-addr {
  font-size: 0.9rem;
  font-family: 'Inter', monospace;
}

/* ---------- Coming Soon ---------- */
.coming-soon {
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}
.coming-soon-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  margin-top: 2rem;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.footer-left {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.footer-links {
  display: flex;
  gap: 1rem;
}
.footer-links a {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-decoration: none;
}
.footer-links a:hover { color: var(--accent); }

/* ---------- Collaborators Section ---------- */
.collab-category-title {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.collab-logo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 1rem 1.5rem;
  margin-bottom: 2.5rem;
}
.collab-logo-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  text-align: center;
  transition: border-color 0.15s;
}
.collab-logo-item:hover { border-color: var(--accent); }
.collab-logo-item img {
  height: 32px;
  width: auto;
  max-width: 110px;
  object-fit: contain;
  filter: grayscale(1) opacity(0.6);
  transition: filter 0.2s;
}
.collab-logo-item:hover img { filter: grayscale(0) opacity(1); }
.collab-logo-item span {
  font-size: 0.73rem;
  color: var(--text-muted);
  line-height: 1.3;
}

/* ---------- University Collabs (Research page) ---------- */
.uni-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 0.85rem;
}
.uni-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem 0.75rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  text-align: center;
}
.uni-item img {
  height: 30px;
  width: auto;
  max-width: 100px;
  object-fit: contain;
  filter: grayscale(1) opacity(0.6);
  transition: filter 0.2s;
}
.uni-item:hover img { filter: grayscale(0) opacity(1); }
.uni-item span {
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.3;
}

/* ---------- Hero with director photo ---------- */
.hero-layout {
  display: flex;
  align-items: flex-start;
  gap: 3rem;
  justify-content: space-between;
}
.hero-text { flex: 1; min-width: 0; }
.hero-photo-col {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  text-align: center;
  padding-top: 0.5rem;
}
.hero-director-photo {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
}
.hero-photo-name {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
}
.hero-photo-role {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.4;
  max-width: 150px;
}

@media (max-width: 600px) {
  .hero-layout {
    flex-direction: column-reverse;
    align-items: flex-start;
    gap: 1.5rem;
  }
  .hero-photo-col { flex-direction: row; align-items: center; gap: 1rem; text-align: left; }
  .hero-director-photo { width: 80px; height: 80px; }
  .hero-photo-role { max-width: 200px; }
}

/* ---------- Dividers ---------- */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

/* ---------- Inline list ---------- */
.inline-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.inline-list li {
  font-size: 0.82rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 0.2rem 0.6rem;
  color: var(--text-muted);
}

/* ---------- Responsive: Tablet ---------- */
@media (max-width: 768px) {
  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.25rem; }

  .nav-links { display: none; flex-direction: column; position: absolute; top: var(--nav-height); left: 0; right: 0; background: var(--bg); border-bottom: 1px solid var(--border); padding: 0.75rem 1.5rem; gap: 0.1rem; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 0.5rem 0.3rem; }
  .nav-toggle { display: flex; }
  .nav-substack { display: none; }

  .director-card { flex-direction: column; align-items: center; text-align: center; }
  .director-links { justify-content: center; }

  .client-grid { grid-template-columns: 1fr; }

  .news-item { grid-template-columns: 80px 1fr; }
  .news-link { grid-column: 2; }

  .stats-strip { gap: 1.5rem; justify-content: center; }
  .footer-inner { flex-direction: column; align-items: flex-start; }

  .project-card { grid-template-columns: 1fr; }
  .project-badge { grid-column: 1; grid-row: auto; justify-self: start; }
}

/* ---------- Responsive: Mobile ---------- */
@media (max-width: 480px) {
  .container { padding: 0 1rem; }
  .section { padding: 2.5rem 0; }
  .filter-bar { gap: 0.3rem; }
  .photo-grid { grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); }
  .theme-grid { grid-template-columns: 1fr; }
  .collab-logo-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }
}