body {
  font-family: 'Noto Sans', sans-serif;
  color: #4a4a4a;
}

.publication-title {
  font-family: 'Google Sans', sans-serif;
  font-weight: 700;
  margin-top: 1.5rem;
  margin-bottom: 1.5rem;
  line-height: 1.25;
}

.publication-authors {
  font-family: 'Google Sans', sans-serif;
  margin-bottom: 0.8rem;
}

.publication-authors a {
  color: #276cda !important;
  text-decoration: none;
}

.publication-authors a:hover {
  text-decoration: underline;
}

.author-block {
  display: inline-block;
  margin-right: 6px;
}

.publication-notes {
  font-family: 'Google Sans', sans-serif;
  color: #666;
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

.publication-links {
  margin-top: 10px;
  margin-bottom: 10px;
}

.link-block a {
  margin: 5px 6px;
  font-weight: 500;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
}

.button.is-dark {
  background-color: #363636;
  border-color: transparent;
  color: #ffffff;
  transition: all 0.2s ease;
}

.button.is-dark:hover {
  background-color: #1e1e1e;
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.hero.is-light {
  background-color: #f7f9fa;
}

.content.has-text-justified {
  text-align: justify;
  text-justify: inter-word;
  line-height: 1.7;
}

.method-image {
  max-width: 100%;
  height: auto;
  box-shadow: 0 4px 14px rgba(0,0,0,0.08);
  border: 1px solid #e5e7eb;
}

/* Tabs styling matching exact reference */
.tabs.is-toggle {
  margin-top: 1rem;
  margin-bottom: 1.5rem;
}

.tabs.is-toggle ul {
  border-bottom: none;
}

.tabs.is-toggle li a {
  border-color: #dbdbdb;
  color: #4a4a4a;
  font-size: 1.05rem;
  padding: 0.65em 1.5em;
  font-weight: 500;
  transition: all 0.2s ease;
  background-color: #ffffff;
}

.tabs.is-toggle li:first-child a {
  border-top-left-radius: 6px;
  border-bottom-left-radius: 6px;
}

.tabs.is-toggle li:last-child a {
  border-top-right-radius: 6px;
  border-bottom-right-radius: 6px;
}

.tabs.is-toggle li a:hover {
  background-color: #f0f4fd;
  color: #276cda;
  border-color: #b5b5b5;
}

.tabs.is-toggle li.is-active a {
  background-color: #276cda !important;
  border-color: #276cda !important;
  color: #ffffff !important;
  font-weight: 600;
  box-shadow: 0 2px 6px rgba(39, 108, 218, 0.35);
}

/* Demo Sub-tabs Styling */
.demo-sub-tabs {
  margin-top: 0.25rem;
  margin-bottom: 1.25rem;
}

.demo-sub-tabs ul {
  border-bottom: none;
}

.demo-sub-tabs li a {
  font-size: 0.9rem;
  padding: 0.45em 0.85em;
  border-color: #e2e8f0;
  background-color: #f8fafc;
  color: #475569;
  font-weight: 500;
}

.demo-sub-tabs li a:hover {
  background-color: #edf5ff;
  color: #276cda;
  border-color: #cbd5e1;
}

.demo-sub-tabs li.is-active a {
  background-color: #276cda !important;
  border-color: #276cda !important;
  color: #ffffff !important;
  font-weight: 600;
  box-shadow: 0 1px 4px rgba(39, 108, 218, 0.25);
}

.demo-pane {
  display: none;
}

.demo-pane.is-active {
  display: block;
  animation: fadeIn 0.25s ease-in-out;
}

/* Video Placeholder Card */
.video-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.05);
  padding: 1.5rem;
  margin-bottom: 2rem;
  transition: all 0.3s ease;
}

.video-container {
  position: relative;
  width: 100%;
  min-height: 420px;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: #f8fafc;
  overflow: hidden;
}

.video-player {
  width: 100%;
  height: 100%;
  border-radius: 8px;
  object-fit: cover;
  display: block;
}

.placeholder-overlay {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2.5rem 1.5rem;
  text-align: center;
}

.placeholder-icon {
  font-size: 3.5rem;
  color: #3b82f6;
  margin-bottom: 1rem;
  animation: pulse 2.5s infinite ease-in-out;
}

@keyframes pulse {
  0%, 100% { opacity: 0.8; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.05); }
}

.placeholder-title {
  color: #ffffff;
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.placeholder-text {
  color: #94a3b8;
  font-size: 0.95rem;
  max-width: 540px;
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

.placeholder-tag {
  background-color: rgba(59, 130, 246, 0.2);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.4);
  padding: 0.35rem 0.85rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
}

.task-description-box {
  margin-top: 1.2rem;
  padding: 1rem 1.25rem;
  background-color: #f8fafc;
  border-left: 4px solid #276cda;
  border-radius: 0 8px 8px 0;
}

.task-pane {
  display: none;
}

.task-pane.is-active {
  display: block;
  animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

footer.footer {
  background-color: #f8fafc;
  padding: 3rem 1.5rem 3rem;
  border-top: 1px solid #e2e8f0;
  margin-top: 3rem;
}