/* ============================================================
   SURGICAL ROBOTICS PROJECT PAGE — Light theme, blue accents
   ============================================================ */

:root {
  --bg-primary: #fafbfd;
  --bg-secondary: #f0f4f8;
  --bg-card: #ffffff;
  --accent: #2563eb;
  --accent-light: #3b82f6;
  --accent-dark: #1d4ed8;
  --accent-dim: rgba(37, 99, 235, 0.06);
  --accent-glow: rgba(37, 99, 235, 0.15);
  --text-primary: #1a1a2e;
  --text-secondary: #4a5568;
  --text-muted: #8a94a6;
  --border: #e2e8f0;
  --border-light: #cbd5e1;
  --red-accent: #e53935;
  --green-accent: #16a34a;
  --blue-accent: #2563eb;
}

* { box-sizing: border-box; }

body {
  font-family: 'Noto Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---- Typography ---- */
.title, .subtitle { color: var(--text-primary) !important; }
.title.is-1 { font-weight: 800; letter-spacing: -0.03em; line-height: 1.15; }
.title.is-3 { font-weight: 700; letter-spacing: -0.02em; }
.title.is-4 { font-weight: 600; letter-spacing: -0.01em; }
.content p, .content li { color: var(--text-secondary); line-height: 1.75; }
.content p b, .content p strong { color: var(--text-primary); }
.content a { color: var(--accent-dark); text-decoration: none; transition: color 0.2s; }
.content a:hover { color: var(--accent); text-decoration: underline; }

/* ---- Sections ---- */
.section {
  background: var(--bg-primary);
  padding: 4rem 1.5rem;
}
.section.alt-bg {
  background: var(--bg-secondary);
}

/* ---- Navbar ---- */
.navbar {
  background: rgba(250, 251, 253, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
}
.navbar-item, .navbar-item .icon { color: var(--text-secondary) !important; }
.navbar-item:hover { color: var(--accent) !important; }
.navbar-burger span { background-color: var(--text-secondary) !important; }

/* ---- Hero / Header ---- */
.hero {
  background: linear-gradient(165deg, #fafbfd 0%, #eef2fb 35%, #e8eefa 50%, #fafbfd 100%);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -15%;
  width: 70%;
  height: 110%;
  background: radial-gradient(ellipse at center, rgba(37, 99, 235, 0.06) 0%, transparent 65%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -5%;
  width: 50%;
  height: 60%;
  background: radial-gradient(ellipse at center, rgba(37, 99, 235, 0.03) 0%, transparent 65%);
  pointer-events: none;
}
.hero .hero-body { position: relative; z-index: 1; }

.publication-title {
  font-family: 'Google Sans', 'Noto Sans', sans-serif;
  color: var(--text-primary);
}

.publication-authors {
  font-family: 'Google Sans', sans-serif;
  color: var(--text-secondary) !important;
}
.publication-authors a { color: var(--accent-dark) !important; }
.publication-authors a:hover { text-decoration: underline; }
.author-block { display: inline-block; }

/* ---- Buttons ---- */
.publication-links .button.is-dark {
  background: var(--text-primary);
  border: 1px solid var(--text-primary);
  color: #fff;
  font-weight: 500;
  transition: all 0.25s ease;
}
.publication-links .button.is-dark:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 18px rgba(37, 99, 235, 0.3);
}
.publication-links .button .icon { color: inherit; }
.link-block a { margin: 5px; }

/* ---- Section titles with accent bar ---- */
.section-divider {
  width: 60px;
  height: 3px;
  background: var(--accent);
  margin: 0 auto 1.5rem;
  border-radius: 2px;
}

.section .title.is-3 {
  position: relative;
  padding-bottom: 0.6rem;
  margin-bottom: 1.5rem;
}

/* ---- Teaser ---- */
.teaser {
  font-family: 'Google Sans', sans-serif;
  background: var(--bg-primary);
}
.teaser .hero-body { padding-top: 0; padding-bottom: 3rem; }

.teaser-figure {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(37, 99, 235, 0.08);
  border: 1px solid var(--border);
}
.teaser-figure img,
.teaser-figure video {
  width: 100%;
  display: block;
}
.teaser-caption {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-top: 1rem;
  text-align: center;
  line-height: 1.6;
}
.teaser-caption strong {
  color: var(--text-primary);
}

/* ---- Video containers ---- */
.video-card {
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-card);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
  transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.2s ease;
}
.video-card:hover {
  border-color: rgba(37, 99, 235, 0.25);
  box-shadow: 0 8px 28px rgba(37, 99, 235, 0.08);
  transform: translateY(-2px);
}
.video-card video {
  width: 100%;
  display: block;
}
.video-card .video-info {
  padding: 0.85rem 1rem;
  border-top: 1px solid var(--border);
}
.video-card .video-info h5 {
  font-family: 'Google Sans', sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.15rem;
  color: var(--text-primary);
}
.video-card .video-info span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ---- Video grids ---- */
.video-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 1.5rem 0;
}
.video-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 1.5rem 0;
}
.video-grid-4 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin: 1.5rem 0;
}

/* ---- Image cards ---- */
.img-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.img-card:hover {
  border-color: rgba(37, 99, 235, 0.25);
  box-shadow: 0 8px 28px rgba(37, 99, 235, 0.08);
}
.img-card img {
  border-radius: 8px;
  width: 100%;
}

/* ---- Figure with caption ---- */
.result-figure {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--border);
  background: white;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
.result-figure img {
  width: 100%;
  display: block;
  border-radius: 8px;
}
.result-figure .fig-caption {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-top: 1rem;
  line-height: 1.6;
  border-top: 1px solid #f0f0f0;
  padding-top: 1rem;
}
.result-figure .fig-caption strong {
  color: var(--text-primary);
}

/* ---- Method / architecture figure ---- */
.method-figure {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--border);
  background: white;
  padding: 1rem;
}
.method-figure img {
  width: 100%;
  display: block;
}

/* ---- Metrics highlight cards ---- */
.metrics-highlight {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 2rem 0;
}
.metric-card {
  background: white;
  border-radius: 12px;
  padding: 1.5rem;
  text-align: center;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
  border: 1px solid var(--border);
  transition: border-color 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
}
.metric-card:hover {
  border-color: rgba(37, 99, 235, 0.25);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.08);
}
.metric-card .metric-value {
  font-family: 'Google Sans', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.25rem;
}
.metric-card .metric-unit {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}
.metric-card .metric-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ---- Control mode cards ---- */
.control-modes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin: 2rem 0;
}
.control-mode-card {
  background: var(--bg-card);
  border-radius: 12px;
  padding: 0;
  border: 1px solid var(--border);
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.2s ease;
}
.control-mode-card:hover {
  border-color: rgba(37, 99, 235, 0.25);
  box-shadow: 0 8px 28px rgba(37, 99, 235, 0.08);
  transform: translateY(-2px);
}
.control-mode-card video {
  width: 100%;
  display: block;
}
.control-mode-card .mode-info {
  padding: 1.25rem;
  border-top: 1px solid var(--border);
}
.control-mode-card .mode-info h4 {
  font-family: 'Google Sans', sans-serif;
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0.5rem;
  color: var(--accent-dark);
}
.control-mode-card .mode-info p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}
.control-mode-card .mode-info code {
  background: rgba(37, 99, 235, 0.06);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.82rem;
  color: var(--accent-dark);
}

/* ---- Environment cards ---- */
.env-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 2rem 0;
}
.env-card {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  border: 1px solid var(--border);
  background: white;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.env-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}
.env-card video {
  width: 100%;
  display: block;
  height: 220px;
  object-fit: cover;
}
.env-card .card-body {
  padding: 1.25rem;
}
.env-card .card-body h4 {
  font-family: 'Google Sans', sans-serif;
  font-weight: 600;
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
  color: var(--text-primary);
}
.env-card .card-body p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
}
.env-label {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(255, 255, 255, 0.92);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  backdrop-filter: blur(4px);
}

/* ---- Contribution list ---- */
.contribution-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
}
.contribution-list li {
  position: relative;
  padding-left: 2rem;
  margin-bottom: 1rem;
  line-height: 1.65;
  font-size: 0.95rem;
  color: var(--text-secondary);
}
.contribution-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
}
.contribution-list li strong {
  color: var(--text-primary);
}

/* ---- BibTeX ---- */
.bibtex-section pre {
  background: #1a1a2e;
  color: #a8c8e8;
  border-radius: 10px;
  padding: 1.5rem;
  font-size: 0.85rem;
  line-height: 1.6;
  overflow-x: auto;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}
.bibtex-section code {
  color: #a8c8e8;
  background: transparent;
}

/* ---- Footer ---- */
.footer {
  background: var(--bg-secondary) !important;
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem !important;
}
.footer .content p { color: var(--text-muted) !important; font-size: 0.85rem; }
.footer a { color: var(--text-secondary) !important; }
.footer a:hover { color: var(--accent) !important; }

/* ---- Misc ---- */
.publication-banner { max-height: parent; }
.publication-banner video {
  position: relative; left: auto; top: auto;
  transform: none; object-fit: fit;
}
.publication-video {
  position: relative; width: 100%; height: 0;
  padding-bottom: 56.25%; overflow: hidden;
  border-radius: 12px !important;
}
.publication-video iframe {
  position: absolute; top: 0; left: 0;
  width: 100%; height: 100%;
}

/* video label on top of video */
.video-label-overlay {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(37, 99, 235, 0.88);
  color: #fff;
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 0.72rem;
  font-weight: 600;
  z-index: 2;
  letter-spacing: 0.02em;
  backdrop-filter: blur(4px);
}

/* ---- Caption text ---- */
.caption {
  color: var(--text-muted);
  font-size: 0.82rem;
  margin-top: 0.5rem;
  text-align: center;
  line-height: 1.5;
}

/* ---- Responsive ---- */
@media screen and (max-width: 768px) {
  .section { padding: 2.5rem 1rem; }
  .title.is-1 { font-size: 1.75rem !important; }
  .video-grid-2,
  .video-grid-3,
  .control-modes { grid-template-columns: 1fr; }
  .env-cards { grid-template-columns: 1fr; }
  .metrics-highlight { grid-template-columns: 1fr; }
  .video-grid-4 { grid-template-columns: 1fr; }
}

@media screen and (min-width: 769px) and (max-width: 1023px) {
  .video-grid-3 { grid-template-columns: 1fr 1fr; }
  .env-cards { grid-template-columns: 1fr 1fr; }
}