/* ============================================================
   academic.css – Design system for pulver22.github.io
   Bootstrap 5 · Inter font · Navy/Blue palette
   ============================================================ */

/* ── Custom properties ───────────────────────────────────── */
:root {
  --navy:      #1a365d;
  --navy-dark: #122848;
  --blue:      #2b6cb0;
  --blue-light:#ebf4ff;
  --gray-bg:   #f7f9fc;
  --gray-text: #4a5568;
  --border:    #e2e8f0;
  --white:     #ffffff;
  --radius:    0.5rem;
  --shadow:    0 2px 12px rgba(0,0,0,.08);
}

/* ── Base ────────────────────────────────────────────────── */
body {
  font-family: 'Inter', 'Segoe UI', sans-serif;
  font-size: 1rem;
  color: #2d3748;
  background: var(--white);
  line-height: 1.7;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.25;
}

a { color: var(--blue); }
a:hover { color: var(--navy); text-decoration: underline; }

hr { border-color: var(--border); }

/* ── Navbar ──────────────────────────────────────────────── */
.navbar-academic {
  background-color: var(--navy);
  padding: .75rem 0;
  box-shadow: 0 2px 8px rgba(0,0,0,.2);
}

.navbar-academic .navbar-brand img {
  height: 36px;
  width: auto;
}

.navbar-academic .nav-link {
  color: rgba(255,255,255,.85) !important;
  font-size: .9rem;
  font-weight: 500;
  padding: .4rem .8rem !important;
  border-radius: .25rem;
  transition: background .15s, color .15s;
}

.navbar-academic .nav-link:hover,
.navbar-academic .nav-link.active {
  color: #fff !important;
  background: rgba(255,255,255,.15);
}

.navbar-academic .navbar-toggler {
  border-color: rgba(255,255,255,.4);
  color: #fff;
}

.navbar-academic .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255,255,255,0.8%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* right-side social icons in navbar */
.navbar-academic .nav-social .nav-link {
  font-size: 1rem;
  padding: .4rem .5rem !important;
}

/* ── Hero / Page headers ─────────────────────────────────── */
.hero-section {
  background: var(--gray-bg);
  padding: 5rem 0 4rem;
}

.page-hero-sm {
  background: var(--navy);
  color: #fff;
  padding: 3rem 0 2.5rem;
}
.page-hero-sm h1 { color: #fff; margin-bottom: .25rem; }
.page-hero-sm p  { color: rgba(255,255,255,.8); margin-bottom: 0; }

/* portrait */
.portrait-circle {
  width: 220px;
  height: 220px;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid #fff;
  box-shadow: var(--shadow);
}

/* research-interest tags */
.interest-tag {
  display: inline-block;
  border: 1.5px solid var(--blue);
  color: var(--blue);
  border-radius: 2rem;
  padding: .2rem .85rem;
  font-size: .8rem;
  font-weight: 500;
  margin: .2rem .15rem;
  text-decoration: none;
  transition: background .15s, color .15s;
}
.interest-tag:hover {
  background: var(--blue);
  color: #fff;
  text-decoration: none;
}

/* CTA / action buttons */
.btn-navy {
  background: var(--navy);
  color: #fff;
  border: none;
  border-radius: .35rem;
  padding: .45rem 1.1rem;
  font-size: .85rem;
  font-weight: 500;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  transition: background .15s;
}
.btn-navy:hover { background: var(--navy-dark); color: #fff; text-decoration: none; }

.btn-outline-navy {
  border: 1.5px solid var(--navy);
  color: var(--navy);
  border-radius: .35rem;
  padding: .4rem 1rem;
  font-size: .85rem;
  font-weight: 500;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  transition: background .15s, color .15s;
  background: transparent;
}
.btn-outline-navy:hover {
  background: var(--navy);
  color: #fff;
  text-decoration: none;
}

/* ── Sections ────────────────────────────────────────────── */
.section-white { background: var(--white); padding: 4rem 0; }
.section-gray  { background: var(--gray-bg); padding: 4rem 0; }

.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 1.75rem;
  padding-bottom: .6rem;
  border-bottom: 3px solid var(--blue);
  display: inline-block;
}

/* ── Project cards ───────────────────────────────────────── */
.project-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow .2s, transform .2s;
  background: #fff;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.project-card:hover {
  box-shadow: 0 8px 24px rgba(0,0,0,.12);
  transform: translateY(-3px);
}
.project-card .card-img-top {
  height: 200px;
  object-fit: cover;
  width: 100%;
}
.project-card .card-body {
  padding: 1.25rem;
  flex: 1;
}
.project-card .card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: .5rem;
}
.project-card .card-text {
  font-size: .88rem;
  color: var(--gray-text);
  margin-bottom: .75rem;
}
.project-card .card-footer {
  background: transparent;
  border-top: 1px solid var(--border);
  padding: .75rem 1.25rem;
  font-size: .78rem;
}

/* funded project feature card */
.project-featured {
  border: 2px solid var(--blue);
  border-top: 5px solid var(--blue);
}
.project-featured .badge-funding {
  background: var(--blue);
  color: #fff;
  border-radius: 2rem;
  padding: .2rem .75rem;
  font-size: .75rem;
  font-weight: 600;
  display: inline-block;
  margin-bottom: .6rem;
}

/* project tags */
.proj-tag {
  display: inline-block;
  background: var(--blue-light);
  color: var(--blue);
  border-radius: 2rem;
  padding: .15rem .65rem;
  font-size: .75rem;
  font-weight: 500;
  margin: .15rem .1rem;
}

/* ── Publications ────────────────────────────────────────── */
.pub-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}
.pub-filter-bar .btn {
  border-radius: 2rem;
  font-size: .85rem;
  padding: .35rem 1rem;
  border: 1.5px solid var(--border);
  color: var(--gray-text);
  background: #fff;
  transition: background .15s, color .15s, border-color .15s;
}
.pub-filter-bar .btn.active,
.pub-filter-bar .btn:hover {
  background: var(--navy);
  color: #fff;
  border-color: var(--navy);
}

#refresh-publications {
  border-radius: 2rem;
  font-size: .85rem;
  padding: .35rem 1rem;
  border: 1.5px solid var(--border);
  color: var(--gray-text);
  background: #fff;
  transition: background .15s, color .15s, border-color .15s;
  cursor: pointer;
  white-space: nowrap;
}
#refresh-publications:hover:not(:disabled) {
  background: var(--navy);
  color: #fff;
  border-color: var(--navy);
}
#refresh-publications:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
#refresh-publications i {
  margin-right: 0.3rem;
}

.pub-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.pub-item {
  display: flex;
  gap: 1rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--border);
  align-items: flex-start;
}
.pub-item:last-child { border-bottom: none; }

.pub-year {
  background: var(--navy);
  color: #fff;
  border-radius: .3rem;
  padding: .2rem .55rem;
  font-size: .78rem;
  font-weight: 600;
  white-space: nowrap;
  align-self: flex-start;
  margin-top: .15rem;
  flex-shrink: 0;
}

.pub-content { flex: 1; }

.pub-title {
  font-weight: 600;
  color: var(--navy);
  font-size: .95rem;
  margin-bottom: .2rem;
}
.pub-title a { color: var(--navy); }
.pub-title a:hover { color: var(--blue); }

.pub-authors {
  font-size: .85rem;
  color: var(--gray-text);
  margin-bottom: .15rem;
}
.pub-authors strong { color: #2d3748; }

.pub-venue {
  font-size: .83rem;
  color: #718096;
  margin-bottom: .35rem;
}

.pub-links a {
  font-size: .78rem;
  border: 1px solid var(--border);
  border-radius: .25rem;
  padding: .1rem .5rem;
  color: var(--blue);
  text-decoration: none;
  margin-right: .3rem;
  transition: background .1s, color .1s;
}
.pub-links a:hover {
  background: var(--blue);
  color: #fff;
  border-color: var(--blue);
}

/* Type tags (journal/conference/preprint) */
.pub-type-tag {
  font-size: .78rem;
  border-radius: .25rem;
  padding: .1rem .5rem;
  font-weight: 500;
  text-decoration: none;
  margin-right: .3rem;
  display: inline-block !important;
}
.pub-type-tag[data-type="journal"] {
  background: #ebf4ff !important;
  color: #2b6cb0 !important;
  border: 1px solid #bee3f8 !important;
}
.pub-type-tag[data-type="conference"] {
  background: #fef5e7 !important;
  color: #d97706 !important;
  border: 1px solid #fde68a !important;
}
.pub-type-tag[data-type="other"] {
  background: #f0fdf4 !important;
  color: #16a34a !important;
  border: 1px solid #bbf7d0 !important;
}

.pub-section-heading {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--navy);
  margin: 2rem 0 1rem;
  padding-left: .6rem;
  border-left: 4px solid var(--blue);
}

/* ── News cards ──────────────────────────────────────────── */
.news-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  transition: box-shadow .2s;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.news-card:hover { box-shadow: var(--shadow); }
.news-card img {
  height: 180px;
  object-fit: cover;
  width: 100%;
}
.news-card .card-body {
  padding: 1rem 1.1rem;
  flex: 1;
}
.news-card .card-title {
  font-size: .95rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: .4rem;
}
.news-card .card-text {
  font-size: .85rem;
  color: var(--gray-text);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ── Full news page (news.html layout) ───────────────────── */
.news-block {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  margin-bottom: 3rem;
}
.news-block.reverse { flex-direction: row-reverse; }
.news-block .text-col,
.news-block .img-col { flex: 1 1 50%; max-width: 50%; padding: 1rem; }
.news-image {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
@media (max-width: 768px) {
  .news-block, .news-block.reverse { flex-direction: column !important; }
  .news-block .text-col,
  .news-block .img-col { max-width: 100%; margin-bottom: 1rem; }
}

/* ── Footer ──────────────────────────────────────────────── */
footer.site-footer {
  background: #2d3748;
  color: #cbd5e0;
  padding: 2.5rem 0;
  font-size: .9rem;
}
footer.site-footer a { color: #a0aec0; }
footer.site-footer a:hover { color: #fff; }

.social-icons-footer {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: flex;
  justify-content: center;
  gap: 1.2rem;
}
.social-icons-footer a {
  font-size: 1.3rem;
  color: #a0aec0;
  transition: color .15s;
}
.social-icons-footer a:hover { color: #fff; }

/* ── Utility ─────────────────────────────────────────────── */
.text-navy { color: var(--navy) !important; }
.bg-navy   { background: var(--navy) !important; }
.mt-navbar { margin-top: 56px; }

/* ── Photos page – full-viewport layout ─────────────────── */
.photos-page {
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* Nav and footer keep their natural height; carousel fills the rest */
.photos-page #navigation,
.photos-page footer.site-footer {
  flex-shrink: 0;
}

.photos-page .images-carousel.swiper-container {
  flex: 1;
  min-height: 0;
  width: 100%; /* explicit cross-axis width prevents Swiper wrapper width from feeding back */
  height: auto; /* let flex determine height so Swiper reads a real value */
}

.images-carousel.swiper-container {
  height: calc(100vh - 56px);
}

.images-carousel .swiper-slide .image-wrap {
  display: block;
  overflow: hidden;
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
}

.images-carousel .swiper-slide .image-wrap::before {
  position: absolute;
  content: "";
  inset: 0;
  z-index: 1;
  background: transparent;
  transition: background .3s ease;
}

.images-carousel .swiper-slide .image-wrap:hover::before {
  background: rgba(0, 0, 0, .4);
}

.images-carousel .swiper-slide .image-wrap img {
  object-fit: cover;
  width: 100%;
  height: 100%;
}

.images-carousel .swiper-slide .image-info {
  text-align: center;
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 2;
  transform: translate(-50%, -50%);
}

.images-carousel .swiper-slide .image-info h2 { color: #fff; }

.images-carousel .btn-outline-white {
  border: 2px solid #fff;
  color: #fff;
  background: transparent;
  text-transform: uppercase;
  font-size: .7rem;
  letter-spacing: .1em;
  border-radius: .25rem;
  padding: .4rem 1rem;
  text-decoration: none;
  display: inline-block;
  transition: background .15s, color .15s;
}
.images-carousel .btn-outline-white:hover {
  background: #fff;
  color: #000;
  text-decoration: none;
}

/* Swiper navigation arrows (Font Awesome 6 chevrons) */
.images-carousel .swiper-button-prev,
.images-carousel .swiper-button-next {
  width: 44px;
  height: 44px;
  background: rgba(0, 0, 0, .55);
  border-radius: 50%;
  top: 50%;
  margin-top: -22px;
}

.images-carousel .swiper-button-prev::before,
.images-carousel .swiper-button-next::before {
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 1rem;
  color: #fff;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.images-carousel .swiper-button-prev::before { content: "\f053"; /* fa-chevron-left  */ }
.images-carousel .swiper-button-next::before { content: "\f054"; /* fa-chevron-right */ }

/* Swiper pagination bullets */
.swiper-pagination-bullet {
  background: rgba(255, 255, 255, .6);
  opacity: 1;
}
.swiper-pagination-bullet-active {
  background: #fff;
}

/* ── Individual gallery pages – mosaic layout ────────────── */
.gallery {
  column-count: 4;
  column-gap: .75rem;
  margin-bottom: 3rem;
}

@media (max-width: 992px) { .gallery { column-count: 3; } }
@media (max-width: 600px) { .gallery { column-count: 2; } }
@media (max-width: 400px) { .gallery { column-count: 1; } }

.imageuh {
  break-inside: avoid;
  margin-bottom: .75rem;
  display: block;
}

.imageuh a { display: block; }

.imageuh img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
  cursor: pointer;
  transition: opacity .2s;
}

.imageuh img:hover { opacity: .88; }