/* =========================================================
   CSS custom properties — light mode (default)
   ========================================================= */
:root {
  --color-bg: #ffffff;
  --color-text: #111111;
  --color-accent: #397516;
  --color-accent-hover: #629638;
  --color-accent-hl: #C8D9C3;
  --color-nav-bg: #ffffff;
  --color-footer-bg: #f3f3f3;
  --color-border: #dddddd;
  --color-muted: #666666;
  --color-card-bg: #ffffff;
}

[data-theme="dark"] {
  --color-bg: #111110;
  --color-text: #e5e7eb;
  --color-accent: #b08366;
  --color-accent-hover: #bd7a4d;
  --color-accent-hl: #4f311e;
  --color-nav-bg: #191917;
  --color-footer-bg: #161716;
  --color-border: #333230;
  --color-muted: #9ca3af;
  --color-card-bg: #111110;
}

/* =========================================================
   Reset / base
   ========================================================= */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Lato', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-accent);
}

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

img {
  max-width: 100%;
  height: auto;
}

/* =========================================================
   Inline media includes — image.html / video.html
   ========================================================= */
.image-wrapper,
.video-wrapper {
  text-align: center;
}

.image-caption,
.video-caption {
  color: var(--color-muted);
  font-size: 0.85rem;
  font-style: italic;
  margin-top: 0.4rem;
}

.multicol-container {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  margin: 1.5rem auto;
  flex-wrap: nowrap;
}

.multicol-col {
  flex: 0 1 auto;
  min-width: 0;
}

.multicol-col img {
  width: 100%;
  height: auto;
  border-radius: 0.5rem;
  display: block;
  object-fit: cover;
}

@media (max-width: 640px) {
  .multicol-container {
    flex-direction: column;
    flex-wrap: wrap;
  }

  .multicol-col {
    width: 100% !important;
  }
}

::selection {
  background-color: var(--color-accent-hl);
  color: var(--color-text);
}

/* =========================================================
   Navigation
   ========================================================= */
.site-header {
  border-bottom: 1px solid var(--color-border);
  background: color-mix(in oklch, var(--color-nav-bg) 80%, transparent);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  position: sticky;
  top: 0;
  z-index: 100;
}

.top-nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}

.brand-logo-wrap {
  position: relative;
  height: 44px;
  /* width expands to fit whichever image is visible */
}

.brand-img {
  display: block;
  height: 44px;
  width: auto;
  object-fit: contain;
  position: absolute;
  top: 0;
  left: 0;
  transition: opacity 0.35s ease;
}

/* wordmark visible by default; icon hidden */
.brand-wordmark { opacity: 1; position: relative; }
.brand-icon     { opacity: 0; }

/* after scroll threshold JS adds .nav-scrolled to <header> */
.site-header.nav-scrolled .brand-wordmark { opacity: 0; }
.site-header.nav-scrolled .brand-icon     { opacity: 1; }

/* invert both logos in dark mode (assumes logos are black on transparent) */
[data-theme="dark"] .brand-img {
  filter: invert(1);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  margin-left: auto;
  align-items: center;
  flex-wrap: wrap;
}

.nav-link {
  text-decoration: none;
  color: inherit;
  padding: 0.3rem 0.6rem;
  border-radius: 0.375rem;
  font-size: 0.9rem;
  transition: background-color 0.15s, color 0.15s;
}

.nav-link:hover {
  background-color: var(--color-accent-hl);
  color: var(--color-accent);
}

.nav-link.active {
  background-color: var(--color-accent-hl);
  color: var(--color-accent);
  font-weight: 600;
}

/* Dropdown submenu (e.g. Research > Publications) */
.nav-item {
  position: relative;
}

.nav-caret {
  font-size: 0.65em;
  margin-left: 0.2em;
  vertical-align: middle;
}

.nav-dropdown {
  list-style: none;
  margin: 0;
  padding: 0.35rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 160px;
  background-color: var(--color-nav-bg);
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity 0.15s, transform 0.15s, visibility 0.15s;
  z-index: 10;
}

.nav-item.has-dropdown:hover .nav-dropdown,
.nav-item.has-dropdown:focus-within .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown-link {
  display: block;
  white-space: nowrap;
}

/* Mobile hamburger */
.nav-toggle {
  display: none;
  margin-left: auto;
  background: none;
  border: none;
  padding: 0.35rem;
  cursor: pointer;
  color: var(--color-text);
}

.nav-toggle-bar {
  width: 22px;
  height: 2px;
  background-color: currentColor;
  display: block;
  margin: 4px 0;
  transition: opacity 0.15s;
}

@media (max-width: 768px) {
  .site-header {
    position: relative;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    padding: 0.75rem 1rem;
    background-color: var(--color-nav-bg);
    flex-direction: column;
    align-items: flex-start;
    border-bottom: 1px solid var(--color-border);
    gap: 0.75rem;
  }

  .nav-links.nav-links--open {
    display: flex;
  }

  .nav-toggle {
    display: inline-block;
  }

  .nav-link {
    width: 100%;
    padding: 0.5rem 0.25rem;
  }

  .nav-item {
    width: 100%;
  }

  .nav-dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: none;
    padding: 0 0 0 1rem;
  }

  .nav-links > li:last-child {
    padding-top: 0.75rem;
    border-top: 1px solid var(--color-border);
    width: 100%;
  }

  .nav-links > li:last-child .theme-toggle {
    margin-left: 0;
  }
}

/* =========================================================
   Theme toggle
   ========================================================= */
.theme-toggle {
  margin-left: 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  padding: 0.25rem 0.6rem;
  background: none;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  cursor: pointer;
  color: var(--color-text);
  font-size: 0.9rem;
  transition: border-color 0.15s;
}

.theme-toggle:hover {
  border-color: var(--color-accent);
}

.theme-toggle-icon--dark {
  display: none;
}

[data-theme="dark"] .theme-toggle-icon--light {
  display: none;
}

[data-theme="dark"] .theme-toggle-icon--dark {
  display: inline;
}

/* =========================================================
   Home hero
   ========================================================= */
.hero {
  position: relative;
  width: 100%;
  min-height: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-cover {
  position: absolute;
  inset: 0;
  background-image: url('/assets/img/lab-cover.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.3;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.75rem;
  padding: 1rem;
}

.hero-wordmark {
  max-width: min(520px, 72%);
  height: auto;
}

[data-theme="dark"] .hero-wordmark {
  filter: invert(1);
}

.hero-buttons {
  display: flex;
  gap: 30px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-hero-primary,
.btn-hero-secondary {
  display: inline-block;
  padding: 0.6rem 2.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0.375rem;
  border: 1.5px solid var(--color-accent);
  transition: background-color 0.15s, border-color 0.15s, color 0.15s;
}

.btn-hero-primary {
  background-color: var(--color-accent);
  color: var(--color-bg);
}

.btn-hero-primary:hover {
  background-color: var(--color-accent-hl);
  border-color: var(--color-accent-hl);
  color: invert(var(--color-bg));
}

.btn-hero-secondary {
  background-color: transparent;
  color: var(--color-accent);
}

.btn-hero-secondary:hover {
  background: var(--color-accent);
  color: #fff;
}

/* =========================================================
   Page layout
   ========================================================= */
.site-main {
  flex: 1;
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 2rem 1rem 4rem;
}

.page-header {
  margin-bottom: 1.5rem;
}

h1, h2, h3 {
  font-family: 'Cal Sans', 'Lato', system-ui, sans-serif;
  font-weight: 600;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; margin-top: 2rem; }
h3 { font-size: 1.2rem; margin-top: 1.5rem; }

/* Collaboration/sponsor logos — float right, height matches three text
   lines (body line-height: 1.7), width scales to keep aspect ratio.
   Override the cap per-image with style="--collab-logo-max-width: 30%" */
.collab-logo {
  float: right;
  height: 5.1em;
  width: auto;
  max-width: var(--collab-logo-max-width, 45%);
  margin: 0 0 0.5em 1.25em;
  object-fit: contain;
}

@media (max-width: 768px) {
  .collab-logo {
    display: none;
  }
}

/* Rounded table — JS in default.html wraps <table> in this div */
.table-scroll {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  background: var(--color-card-bg);
  margin: 1.5rem 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 0;
  min-width: 320px;
}

thead tr {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

th {
  padding: 0.6rem 1rem;
  text-align: left;
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-muted);
  white-space: nowrap;
}

td {
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  font-size: 0.9rem;
}

tbody tr:last-child td {
  border-bottom: none;
}

tbody tr:hover td {
  background: color-mix(in oklch, var(--color-accent) 8%, transparent);
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  border-top: 1px solid var(--color-border);
  background-color: var(--color-footer-bg);
}

.footer-banner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 1.25rem 1rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  justify-content: space-between;
  flex-wrap: wrap;
}


.footer-lab-wordmark {
  height: 44px;
  width: auto;
  display: block;
  margin-bottom: 0.3rem;
}

.footer-lab-name {
  font-weight: 700;
  margin-bottom: 0.25rem;
}

[data-theme="dark"] .footer-lab-wordmark {
  filter: invert(1);
}

.footer-lab-description {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 0.25rem;
}

.footer-lab-address {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.5;
}

.footer-logos {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.footer-logo {
  height: 36px;
  object-fit: contain;
  opacity: 0.85;
  transition: opacity 0.15s;
}

.footer-logo:hover {
  opacity: 1;
}

/* =========================================================
   People page — member grid & cards
   ========================================================= */
.member-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.5rem;
  margin: 1.25rem 0 2rem;
}

.member-card {
  text-align: center;
}

.member-card-link {
  display: block;
  text-decoration: none;
  color: inherit;
  border-radius: 0.75rem;
  padding: 1.75rem 1.25rem;
  border: 1px solid transparent;
  background-color: transparent;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.member-card-link:hover {
  border-color: var(--color-accent);
  box-shadow: 0 2px 8px rgba(0, 85, 204, 0.12);
  color: inherit;
}

.member-card-photo {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  margin: 0 auto 0.75rem;
}

.member-photo--default {
  background-image: url('/assets/img/lab-logo.png');
  background-size: 55%;
  background-repeat: no-repeat;
  background-position: center;
  opacity: 0.2;
}

[data-theme="dark"] .member-photo--default {
  filter: invert(1);
  opacity: 0.2;
}

.news-card-image-default {
  width: 100%;
  height: 100%;
  background-image: url('/assets/img/lab-logo.png');
  background-size: 40%;
  background-repeat: no-repeat;
  background-position: center;
  opacity: 0.2;
}

[data-theme="dark"] .news-card-image-default {
  filter: invert(1);
  opacity: 0.2;
}

.member-card-photo--placeholder {
  background-color: var(--color-accent);
  color: #fff;
  font-size: 2rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.member-card-name {
  display: block;
  font-weight: 600;
  font-size: 1.05rem;
  margin-bottom: 0.2rem;
}

.member-card-position {
  display: block;
  font-size: 0.9rem;
  color: var(--color-muted);
}

/* =========================================================
   Member profile page
   ========================================================= */
.member-profile {
  max-width: 720px;
}

.member-header {
  display: flex;
  gap: 1.75rem;
  align-items: flex-start;
  margin-bottom: 1.75rem;
  flex-wrap: wrap;
}

.member-photo {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.member-photo--placeholder {
  background-color: var(--color-accent);
  color: #fff;
  font-size: 3rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.member-header-text {
  padding-top: 0.25rem;
}

.member-name {
  margin: 0 0 0.35rem;
  font-size: 1.75rem;
}

.member-role {
  margin: 0.2rem 0;
  font-size: 1.05rem;
  font-weight: 500;
}

.member-affiliation {
  margin: 0.2rem 0;
  color: var(--color-muted);
}

.member-meta {
  margin-bottom: 1.5rem;
  border-top: 1px solid var(--color-border);
  padding-top: 1rem;
}

.member-meta p {
  margin: 0.4rem 0;
  font-size: 0.95rem;
}

.member-links {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.member-links li {
  display: inline;
}

.member-links a {
  display: inline-block;
  color: var(--color-accent);
  text-decoration: none;
  border: 1px solid var(--color-accent);
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  font-size: 0.85rem;
  transition: background-color 0.15s, color 0.15s;
}

.member-links a:hover {
  background-color: var(--color-accent);
  color: #fff;
}

.member-bio {
  border-top: 1px solid var(--color-border);
  padding-top: 1rem;
}

.member-bio h2 {
  font-size: 1.2rem;
  margin-top: 0;
  margin-bottom: 0.75rem;
}

/* =========================================================
   Publications
   ========================================================= */
/* jekyll-scholar wraps each entry in <li id="..."> inside <ol class="bibliography"> */
.bibliography {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.bibliography li {
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.95rem;
  line-height: 1.6;
}

.bibliography li:last-child {
  border-bottom: none;
}

.pub-authors {
  display: block;
  margin-bottom: 0.2rem;
}

.pub-author-link {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 600;
}

.pub-author-link:hover {
  text-decoration: underline;
}

.pub-year {
  color: var(--color-muted);
  font-size: 0.9rem;
}

.pub-title {
  font-weight: 600;
  margin-bottom: 0.2rem;
}

.pub-venue-line {
  color: var(--color-muted);
}

.pub-venue em {
  color: var(--color-muted);
}

.pub-links a {
  margin-left: 0.5rem;
  color: var(--color-accent);
  text-decoration: none;
  font-size: 0.85rem;
  border: 1px solid var(--color-accent);
  padding: 0.1rem 0.4rem;
  border-radius: 0.25rem;
}

.pub-links a:hover {
  background-color: var(--color-accent);
  color: #fff;
}

.pub-note {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-accent);
  background: var(--color-accent-hl);
  padding: 0.1rem 0.45rem;
  border-radius: 0.25rem;
  margin-right: 0.25rem;
  letter-spacing: 0.02em;
  vertical-align: middle;
}

.pub-note--hl {
  color: #7c4b00;
  background: #fde9c0;
}

[data-theme="dark"] .pub-note--hl {
  color: #f5c77e;
  background: #3d2800;
}

.pub-presentation {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  color: #c0392b;
  margin-right: 0.25rem;
  vertical-align: middle;
}

/* Featured Research renders one {% bibliography %} call per configured key
   (to control card order), producing one <ol class="bibliography"> per card.
   display: contents drops each <ol>'s own box so its <li> card lays out
   directly in the .pub-cards-container flex row below. */
.pub-cards-container .bibliography {
  display: contents;
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.pub-cards-container .bibliography li {
  flex: 1 1 300px;
  min-width: 280px;
  margin: 0;
  padding: 0;
  border-bottom: none;
  font-size: inherit;
  line-height: inherit;
}

/* Call for Collaborations — boxed, two-column card (home page) */
.collab-card {
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  padding: 1.75rem;
  background-color: var(--color-card-bg);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 1.25rem;
  margin-bottom: 50px;
}

@media (max-width: 640px) {
  .collab-card {
    grid-template-columns: 1fr;
  }
}
/* ─────────────────────────────────────────
   Research overview (home page)
───────────────────────────────────────── */
.research-overview {
  margin-top: 2.5rem;
}

.research-item {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.research-item--reverse {
  flex-direction: row-reverse;
}

.research-item-text {
  flex: 65;
  min-width: 0;
}

.research-item-image {
  flex: 35;
  min-width: 0;
}

.research-item-image img {
  width: 100%;
  height: auto;
  border-radius: 0.5rem;
  display: block;
  object-fit: cover;
}

.research-item-text h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.research-item-text p {
  margin-top: 0;
  margin-bottom: 1rem;
  color: var(--color-muted);
  line-height: 1.65;
}

.btn-learn-more {
  display: inline-block;
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent);
  border: 1.5px solid var(--color-accent);
  border-radius: 0.3rem;
  text-decoration: none;
  transition: background 0.18s, color 0.18s;
}

.btn-learn-more:hover {
  background: var(--color-accent);
  color: #fff;
}

@media (max-width: 640px) {
  .research-item,
  .research-item--reverse {
    flex-direction: column;
  }

  .research-item-image {
    width: 100%;
  }
}

.research-item--no-image .research-item-text {
  flex: 1 1 100%;
}

h2.bibliography {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-muted);
  margin-top: 2.25rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.35rem;
  border-bottom: 2px solid var(--color-border);
  letter-spacing: 0.04em;
}

/* ─────────────────────────────────────────
   Contact page
───────────────────────────────────────── */
.contact-columns {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
}

.contact-col {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

@media (max-width: 640px) {
  .contact-columns {
    flex-direction: column;
    gap: 1.25rem;
  }
}