:root {
  --page-bg: #ffffff;
  --sheet-bg: #ffffff;
  --ink: #111111;
  --muted: #545454;
  --line: #cfcfcf;
  --accent: #143b63;
  --accent-soft: #f3f6fa;
  --shadow: 0 10px 28px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--page-bg);
  color: var(--ink);
  font-family: "Times New Roman", Times, serif;
  line-height: 1.42;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

code,
pre {
  font-family: "Courier New", Courier, monospace;
}

.page-shell {
  max-width: 8.6in;
  margin: 0 auto;
  padding: 1.1rem 0.95rem 2rem;
}

.report-header,
.paper {
  background: var(--sheet-bg);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.report-header {
  padding: 1.1rem 1.35rem 1rem;
}

.report-type {
  margin: 0;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.84rem;
  color: var(--muted);
}

.report-header h1 {
  margin: 0.5rem 0 0;
  text-align: center;
  font-size: 2.25rem;
  line-height: 1.08;
}

.author-line,
.affiliation-line {
  margin: 0.55rem 0 0;
  text-align: center;
}

.affiliation-line {
  color: var(--muted);
}

.top-links {
  margin-top: 0.9rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.45rem 1rem;
  font-size: 0.95rem;
}

.paper {
  margin-top: 1rem;
  padding: 1.35rem 1.45rem 1.75rem;
}

.paper section + section {
  margin-top: 1.6rem;
}

.paper h2,
.paper h3 {
  margin: 0 0 0.7rem;
  font-weight: 700;
}

.paper h2 {
  font-size: 1.45rem;
}

.paper h3 {
  font-size: 1.15rem;
  margin-top: 1rem;
}

.two-column {
  column-count: 2;
  column-gap: 1.55rem;
  text-align: justify;
}

.two-column p {
  margin: 0 0 0.85rem;
  break-inside: avoid;
}

.inline-math {
  font-style: italic;
}

.equation {
  margin: 0.85rem 0;
  padding: 0.7rem 0.85rem;
  text-align: center;
  font-size: 1.03rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-note,
.table-note {
  margin: 0.6rem 0 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.results-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.results-table th,
.results-table td {
  border: 1px solid var(--line);
  padding: 0.56rem 0.62rem;
  vertical-align: top;
  text-align: left;
}

.results-table thead th {
  background: var(--accent-soft);
}

.listing-block {
  margin-top: 1rem;
  border: 1px solid var(--line);
  background: #fafafa;
}

.listing-title {
  margin: 0;
  padding: 0.65rem 0.8rem 0;
  font-size: 0.94rem;
  color: var(--muted);
}

.listing-block pre {
  margin: 0;
  padding: 0.8rem;
  overflow-x: auto;
  font-size: 0.89rem;
  line-height: 1.38;
}

.media-grid {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.media-figure {
  margin: 0;
  padding: 0.8rem;
  border: 1px solid var(--line);
  background: #fcfcfc;
}

.video-embed {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
}

.video-embed iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}

.media-figure figcaption {
  margin-top: 0.55rem;
  font-size: 0.93rem;
}

.references {
  margin: 0;
  padding-left: 1.2rem;
}

.references li + li {
  margin-top: 0.5rem;
}

@media (max-width: 900px) {
  .two-column {
    column-count: 1;
    text-align: left;
  }

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

  .paper {
    padding: 1rem;
  }
}

@media print {
  body {
    background: #fff;
  }

  .page-shell {
    max-width: none;
    padding: 0;
  }

  .report-header,
  .paper {
    box-shadow: none;
    border: 0;
  }

  .paper {
    padding: 0;
  }
}