:root {
  --subpage-bg: #f5f7fb;
  --subpage-card-bg: #ffffff;
  --subpage-text-strong: #173042;
  --subpage-text-main: #2c3e50;
  --subpage-text-muted: #5f6f7d;
  --subpage-accent: #2698ba;
  --subpage-accent-soft: rgba(38, 152, 186, 0.12);
  --subpage-line: #e8eef5;
  --subpage-shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
}

body.subpage {
  font-family: "Roboto", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.7;
  color: var(--subpage-text-main);
  background: var(--subpage-bg);
}

body.subpage .page-container {
  max-width: 1040px;
}

body.subpage .site-nav {
  background-color: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid #e7edf3;
  box-shadow: 0 4px 18px rgba(15, 23, 42, 0.04);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

body.subpage .site-nav .navbar-brand {
  color: var(--subpage-text-strong);
  font-size: 1.02rem;
  letter-spacing: 0.02em;
}

body.subpage .site-nav .nav-link {
  color: var(--subpage-text-main);
  font-size: 0.96rem;
  font-weight: 500;
  padding: 0.35rem 0.72rem;
  border-radius: 999px;
  transition: color 0.2s ease, background-color 0.2s ease;
}

body.subpage .site-nav .nav-link:hover,
body.subpage .site-nav .nav-link:focus,
body.subpage .site-nav .nav-link.is-active,
body.subpage .site-nav .nav-link.active {
  color: var(--subpage-accent);
  background-color: var(--subpage-accent-soft);
  text-decoration: none;
}

body.subpage .site-nav-links {
  gap: 0.3rem;
}

body.subpage .toggle-container {
  margin-left: 0.35rem;
}

body.subpage .toggle-container a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--subpage-text-main);
  border-radius: 999px;
  cursor: pointer;
}

body.subpage .toggle-container a:hover,
body.subpage .toggle-container a:focus {
  color: var(--subpage-accent);
  background-color: var(--subpage-accent-soft);
  text-decoration: none;
}

body.subpage main {
  padding-top: 0.9rem;
}

body.subpage .page-shell,
body.subpage .post {
  padding: 1.65rem 1.75rem;
  margin-bottom: 2rem;
  border: 1px solid var(--subpage-line);
  border-radius: 18px;
  background: var(--subpage-card-bg);
  box-shadow: var(--subpage-shadow);
}

body.subpage .post-header {
  margin-bottom: 1.5rem;
  padding-right: 0;
}

body.subpage .post-title,
body.subpage h1 {
  margin: 0 0 0.35rem;
  color: var(--subpage-text-strong);
  font-size: 2.2rem;
  font-weight: 600;
  letter-spacing: -0.03em;
}

body.subpage .post-description,
body.subpage .page-lead {
  margin: 0 0 1.5rem;
  color: #4a7186;
  font-size: 1rem;
}

body.subpage .topic-section + .topic-section {
  margin-top: 1.8rem;
}

body.subpage .topic-title {
  position: relative;
  padding-left: 0.8rem;
  margin: 0 0 1rem;
  color: var(--subpage-text-strong);
  font-size: 1.1rem;
  font-weight: 600;
}

body.subpage .topic-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.15rem;
  bottom: 0.15rem;
  width: 4px;
  border-radius: 999px;
  background: var(--subpage-accent);
}

body.subpage .paper-list {
  display: grid;
  gap: 0.9rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

body.subpage .paper-item {
  padding: 0.95rem 1rem;
  border-left: 4px solid #d9e7f0;
  border-radius: 14px;
  background: #ffffff;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.04);
}

body.subpage .paper-content {
  min-width: 0;
}

body.subpage .paper-link,
body.subpage .venue {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--subpage-text-strong);
  font-size: 1rem;
  line-height: 1.5;
}

body.subpage .paper-link:hover {
  color: var(--subpage-accent);
}

body.subpage .authors,
body.subpage .caption,
body.subpage .image-caption {
  color: var(--subpage-text-muted);
  font-size: 0.93rem;
}

body.subpage .image-container {
  margin-top: 0.75rem;
  text-align: center;
}

body.subpage .image-container img {
  width: min(100%, 420px);
  height: auto;
  display: block;
  margin: 0 auto;
  border-radius: 14px;
  box-shadow: var(--subpage-shadow);
}

body.subpage .image-caption {
  margin-top: 0.75rem;
  font-style: italic;
}

body.subpage .projects .grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

body.subpage .projects h2.category {
  margin: 1.75rem 0 0.9rem;
  color: var(--subpage-text-strong);
  font-size: 1.1rem;
  text-align: left;
  border-bottom: none;
  text-transform: none;
}

body.subpage .projects .grid-item {
  width: auto;
  margin-bottom: 0;
}

body.subpage .projects .grid-item .card,
body.subpage .projects .card-item .card {
  height: 100%;
  border: 1px solid var(--subpage-line);
  border-radius: 14px;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.04);
  overflow: hidden;
}

body.subpage .projects .grid-item .card img,
body.subpage .projects .card-item .card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

body.subpage .projects .card-body {
  padding: 1rem;
}

body.subpage .projects .card-title {
  color: var(--subpage-text-strong);
  font-size: 1rem;
  text-transform: none;
}

body.subpage .projects .card-title.text-lowercase {
  text-transform: none !important;
}

body.subpage .projects .card-text {
  color: var(--subpage-text-muted);
  font-size: 0.92rem;
}

body.subpage .publications {
  margin-top: 0;
}

@media screen and (max-width: 768px) {
  body.subpage .page-container {
    padding-left: 12px;
    padding-right: 12px;
  }

  body.subpage .page-shell,
  body.subpage .post {
    padding: 1.2rem;
  }

  body.subpage .site-nav-links {
    gap: 0.2rem;
    padding-top: 0.7rem;
  }

  body.subpage .post-title,
  body.subpage h1 {
    font-size: 1.8rem;
  }
}