:root {
  --background: #ffffff;
  --surface: #f7f8fa;
  --text: #202124;
  --muted: #62676d;
  --accent: #1367a7;
  --accent-hover: #0d4f82;
  --border: #dfe3e8;
  --code-background: #f4f5f7;
  --max-width: 940px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family:
    "Helvetica Neue",
    Helvetica,
    Arial,
    system-ui,
    -apple-system,
    sans-serif;
  font-size: 18px;
  font-weight: 300;
  line-height: 1.65;
}

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

a:hover,
a:focus-visible {
  color: var(--accent-hover);
  text-decoration: underline;
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.container {
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
}

.site-nav {
  padding: 22px 0 0;
  font-size: 0.86rem;
  font-weight: 500;
}

.site-nav a {
  color: var(--muted);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--accent);
}

.site-nav .separator {
  margin: 0 8px;
  color: var(--border);
}

header {
  padding: 54px 0 42px;
  text-align: center;
}

.version {
  display: inline-block;
  margin-bottom: 15px;
  padding: 3px 11px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.055em;
  text-transform: uppercase;
}

h1 {
  max-width: 900px;
  margin: 0 auto;
  font-size: clamp(2rem, 6vw, 3.25rem);
  font-weight: 400;
  letter-spacing: -0.035em;
  line-height: 1.12;
}

.authors {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 5px 18px;
  max-width: 850px;
  margin: 24px auto 0;
  font-size: 1.06rem;
  font-weight: 400;
}

.authors span {
  white-space: nowrap;
}

.affiliations {
  max-width: 790px;
  margin: 14px auto 0;
  color: var(--muted);
  font-size: 0.87rem;
  line-height: 1.5;
}

.venue {
  margin: 17px auto 0;
  color: var(--muted);
  font-size: 0.96rem;
  font-weight: 500;
}

.header-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 22px;
  margin-top: 26px;
  font-size: 1rem;
  font-weight: 500;
}

.header-links a::before {
  content: "[";
  color: var(--muted);
}

.header-links a::after {
  content: "]";
  color: var(--muted);
}

main section {
  padding: 44px 0;
  border-top: 1px solid var(--border);
}

h2 {
  margin: 0 0 24px;
  text-align: center;
  font-size: 1.8rem;
  font-weight: 400;
  letter-spacing: -0.015em;
}

h3 {
  margin: 0 0 7px;
  font-size: 1.05rem;
  font-weight: 600;
}

.prose {
  max-width: 830px;
  margin: 0 auto;
  text-align: justify;
}

.prose p {
  margin: 0 0 1rem;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 15px;
}

.summary-card {
  padding: 19px 20px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--surface);
}

.summary-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.48;
}

.release-box {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(230px, 0.65fr);
  gap: 22px;
  padding: 24px 26px;
  border: 1px solid var(--border);
  border-radius: 10px;
}

.release-box p {
  margin: 0 0 0.8rem;
}

.release-box ul {
  margin: 0.8rem 0 0;
  padding-left: 1.15rem;
}

.release-meta {
  padding-left: 22px;
  border-left: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.88rem;
}

.release-meta dl {
  margin: 0;
}

.release-meta div + div {
  margin-top: 12px;
}

.release-meta dt {
  font-weight: 600;
  color: var(--text);
}

.release-meta dd {
  margin: 2px 0 0;
}

.note {
  margin-top: 20px;
  padding: 14px 17px;
  border-left: 3px solid var(--accent);
  background: var(--surface);
  color: var(--muted);
  font-size: 0.88rem;
}

pre {
  margin: 0;
  padding: 18px 20px;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--code-background);
  font: 0.82rem/1.55
    ui-monospace,
    SFMono-Regular,
    Menlo,
    Monaco,
    Consolas,
    "Liberation Mono",
    monospace;
  white-space: pre-wrap;
  word-break: break-word;
}

.placeholder {
  border: 1px dashed #aeb5bd;
  background: #fafbfc;
}

.placeholder-label {
  display: inline-block;
  margin-left: 5px;
  color: #8a4b08;
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

footer {
  padding: 34px 0 48px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  text-align: center;
  font-size: 0.84rem;
}

footer p {
  margin: 0.25rem 0;
}

@media (max-width: 760px) {
  .summary-grid {
    grid-template-columns: 1fr;
  }

  .release-box {
    grid-template-columns: 1fr;
  }

  .release-meta {
    padding: 20px 0 0;
    border-top: 1px solid var(--border);
    border-left: 0;
  }
}

@media (max-width: 620px) {
  body {
    font-size: 16px;
  }

  .site-nav {
    text-align: center;
  }

  header {
    padding-top: 42px;
  }

  main section {
    padding: 37px 0;
  }

  .prose {
    text-align: left;
  }

  .authors {
    gap: 4px 12px;
  }
}