body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
  background: #ffffff;
  color: #111;
}

/* homepage-only centering */
body.homepage {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.container {
  text-align: center;
  max-width: 600px;
  padding: 20px;
}

h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.tagline {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  line-height: 1.6;
}

.angle {
  display: block;
  margin-top: 0.5rem;
}

.links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 2rem;
}

.links a {
  text-decoration: none;
  border-bottom: 1px solid #111;
  padding-bottom: 2px;
}

.links a:hover {
  opacity: 0.6;
}

.about {
  font-size: 0.95rem;
  opacity: 0.8;
  margin-bottom: 2rem;
}

.phase-lock {
  margin-top: 3rem;
  font-size: 0.9rem;
  opacity: 0.8;
  text-align: center;
}

.phase-lock h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.equation {
  margin: 1rem 0;
  font-family: monospace;
  font-size: 1rem;
}

.infographic {
  display: flex;
  justify-content: space-between;
  margin: 2rem 0;
  gap: 20px;
}

.panel {
  flex: 1;
  border: 1px solid #ddd;
  padding: 10px;
  text-align: center;
}

.panel h3 {
  margin-bottom: 0.5rem;
}

.arrows {
  font-size: 1.2rem;
  margin-top: 0.5rem;
}

.infographic-img {
  width: 100%;
  max-width: 800px;
  margin: 2rem auto;
  display: block;
}

/* arXiv tables */
.arxiv-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin: 2rem 0;
}

.arxiv-table thead {
  border-bottom: 2px solid #111;
}

.arxiv-table th {
  text-align: left;
  font-weight: 600;
  padding: 10px 8px;
  font-size: 0.85rem;
  text-transform: lowercase;
}

.arxiv-table td {
  padding: 10px 8px;
  vertical-align: top;
  border-bottom: 1px solid #eee;
}

.arxiv-table tbody tr:hover {
  background: #fafafa;
}

.arxiv-table a {
  text-decoration: none;
  border-bottom: 1px solid #111;
  padding-bottom: 1px;
}

.arxiv-table a:hover {
  opacity: 0.6;
}

.arxiv-table td:nth-child(3) {
  max-width: 400px;
  line-height: 1.4;
}

.arxiv-table td:nth-child(1),
.arxiv-table td:nth-child(2),
.arxiv-table td:nth-child(4),
.arxiv-table td:nth-child(5) {
  white-space: nowrap;
}

/* reading/article pages */
.reading-page {
  max-width: 860px;
  margin: 0 auto;
  padding: 40px 20px 60px;
  text-align: left;
}

.page-header {
  margin-bottom: 2.5rem;
}

.eyebrow {
  font-size: 0.85rem;
  text-transform: lowercase;
  opacity: 0.7;
  margin-bottom: 0.5rem;
}

.page-header h1 {
  font-size: 2.2rem;
  line-height: 1.15;
  margin: 0 0 0.75rem 0;
}

.meta-links {
  font-size: 0.95rem;
  margin-top: 0.75rem;
}

.article-section {
  margin: 2.5rem 0;
}

.article-section h2 {
  font-size: 1.1rem;
  margin-bottom: 0.9rem;
  text-transform: lowercase;
}

.article-section p {
  line-height: 1.65;
  margin: 0.85rem 0;
}

.feature-figure {
  margin: 2.5rem 0;
}

.feature-figure figcaption {
  font-size: 0.9rem;
  opacity: 0.8;
  margin-top: 0.75rem;
}

.reading-page .infographic-img {
  width: 100%;
  max-width: 860px;
  display: block;
  margin: 0 auto;
  border-radius: 8px;
}

.equation-block {
  margin: 1.25rem 0;
  padding: 1rem 1.1rem;
  border: 1px solid #e5e5e5;
  border-radius: 8px;
}

.equation-note {
  margin: 0.6rem 0;
  opacity: 0.85;
}

.bridge-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 1rem;
}

.bridge-card {
  border: 1px solid #e5e5e5;
  border-radius: 8px;
  padding: 1rem;
}

.bridge-card h3 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1rem;
}

.bridge-card p {
  margin: 0.45rem 0;
}

.phase-lock-note {
  font-size: 0.95rem;
  opacity: 0.9;
}

.page-footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid #e5e5e5;
  font-size: 0.95rem;
}

footer a {
  font-size: 0.85rem;
  opacity: 0.6;
  text-decoration: none;
}

@media (max-width: 700px) {
  .page-header h1 {
    font-size: 1.7rem;
  }

  .bridge-grid {
    grid-template-columns: 1fr;
  }

  .arxiv-table {
    font-size: 0.8rem;
  }

  .arxiv-table td:nth-child(3) {
    max-width: none;
  }

  .links {
    flex-wrap: wrap;
    gap: 12px;
  }

  .infographic {
    flex-direction: column;
  }
}