:root {
  color-scheme: light;
  --bg: #f8fafc;
  --paper: #ffffff;
  --ink: #13213b;
  --muted: #5f6f8a;
  --line: #d9e1ee;
  --navy: #132b56;
  --indigo: #3157a4;
  --accent: #b94f3b;
  --accent-soft: #fff1ed;
  --shadow: 0 18px 50px rgba(20, 39, 73, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

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

a:hover {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(248, 250, 252, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.nav {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  color: var(--navy);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 14px;
  font-weight: 650;
}

.nav-links a {
  color: var(--ink);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  color: var(--ink);
  padding: 8px 12px;
  font: inherit;
  font-weight: 700;
}

.hero {
  background: linear-gradient(180deg, #ffffff 0%, #f2f6fc 100%);
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  width: min(1180px, calc(100% - 32px));
  min-height: min(760px, calc(100vh - 128px));
  max-height: 860px;
  margin: 0 auto;
  padding: 72px 0 54px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  align-items: center;
  gap: 48px;
}

.venue {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 3px 10px;
  border-radius: 999px;
  background: #eaf0ff;
  color: var(--indigo);
  font-size: 13px;
  font-weight: 800;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin: 22px 0 20px;
  color: var(--navy);
  font-size: clamp(44px, 7vw, 78px);
  line-height: 0.98;
  letter-spacing: 0;
}

h1 span {
  display: block;
  color: #284774;
}

h2 {
  margin-bottom: 16px;
  color: var(--navy);
  font-size: 34px;
  line-height: 1.12;
  letter-spacing: 0;
}

h3 {
  color: var(--navy);
  font-size: 19px;
  line-height: 1.25;
}

.subtitle {
  max-width: 740px;
  color: #384b69;
  font-size: 20px;
}

.authors,
.affiliations,
.equal {
  color: var(--muted);
  font-size: 15px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.actions a,
.actions .disabled {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border-radius: 7px;
  padding: 9px 15px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--navy);
  font-size: 14px;
  font-weight: 800;
  box-shadow: 0 6px 18px rgba(20, 39, 73, 0.08);
}

.actions a:first-child {
  border-color: var(--navy);
  background: var(--navy);
  color: #ffffff;
}

.actions .disabled {
  color: #8b96a8;
  box-shadow: none;
}

.hero-visual img,
.figure-row img,
.summary-art img {
  display: block;
  width: 100%;
  height: auto;
}

.hero-visual {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.section {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 76px 0;
}

.section-grid {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 60px;
  align-items: start;
}

.section-title {
  max-width: 820px;
  margin-bottom: 28px;
}

.kicker {
  margin-bottom: 10px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 850;
  letter-spacing: 0;
  text-transform: uppercase;
}

.lead {
  color: #263957;
  font-size: 21px;
  line-height: 1.48;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.card {
  min-height: 190px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: 0 10px 32px rgba(20, 39, 73, 0.08);
}

.card.accent {
  border-color: #efc9c0;
  background: var(--accent-soft);
}

.figure-row {
  margin-top: 28px;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 24px;
  align-items: stretch;
}

.figure-row img,
.equations,
pre,
.table-wrap {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: 0 10px 32px rgba(20, 39, 73, 0.06);
}

.equations {
  display: grid;
  align-content: center;
  gap: 14px;
  padding: 24px;
  color: var(--navy);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 15px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}

.stat {
  min-height: 150px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.stat span,
.stat small {
  display: block;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.35;
}

.stat strong {
  display: block;
  margin: 14px 0 10px;
  color: var(--navy);
  font-size: 30px;
  line-height: 1;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

th,
td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

th {
  color: var(--navy);
  background: #f3f6fb;
  font-size: 13px;
  text-transform: uppercase;
}

td:not(:first-child),
th:not(:first-child) {
  text-align: right;
}

tr:last-child td {
  border-bottom: 0;
}

.summary-art {
  margin-top: 24px;
}

.caption {
  margin: 12px 16px 16px;
  color: var(--muted);
  font-size: 14px;
}

pre {
  overflow-x: auto;
  padding: 18px;
  color: #e9eef7;
  background: #111c32;
}

pre + pre {
  margin-top: 16px;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 14px;
}

.footer {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 46px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
  font-size: 14px;
}

.footer span {
  margin-right: auto;
}

@media (max-width: 920px) {
  .hero-inner,
  .section-grid,
  .figure-row {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    min-height: auto;
    padding-top: 44px;
  }

  .cards,
  .stats {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 46px;
  }
}

@media (max-width: 720px) {
  .nav {
    align-items: flex-start;
    padding: 13px 0;
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-top: 10px;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 10px 0;
  }

  .section {
    padding: 56px 0;
  }

  .hero-inner {
    padding: 30px 0 26px;
  }

  .hero-visual {
    display: none;
  }

  h1 {
    font-size: 34px;
  }

  h2 {
    font-size: 28px;
  }

  .subtitle,
  .lead {
    font-size: 18px;
  }

  th,
  td {
    padding: 12px;
    white-space: nowrap;
  }
}