:root {
  --research-bg: #f7f5ef;
  --research-ink: #24231f;
  --research-muted: #68655d;
  --research-rule: #d8d3c7;
  --research-accent: #ad4f33;
  --research-blue: #31566b;
  --research-panel: #fffdf8;
  --research-mono: "SFMono-Regular", "Roboto Mono", "IBM Plex Mono", monospace;
  --research-serif: Georgia, "Times New Roman", "Noto Serif SC", serif;
  --research-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", sans-serif;
}

* {
  box-sizing: border-box;
}

body.research-home,
body.research-section {
  margin: 0;
  background: var(--research-bg);
  color: var(--research-ink);
  font-family: var(--research-sans);
}

.research-topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 52px;
  padding: 0 32px;
  border-bottom: 1px solid var(--research-rule);
  background: rgba(247, 245, 239, 0.94);
  backdrop-filter: blur(10px);
  font-family: var(--research-mono);
}

.research-topbar a {
  color: var(--research-muted);
  text-decoration: none;
}

.research-topbar a:hover,
.research-topbar a:focus {
  color: var(--research-ink);
}

.research-brand {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--research-ink);
}

.research-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.research-nav a[aria-current="page"] {
  color: var(--research-accent);
}

.research-shell {
  width: min(1120px, calc(100vw - 48px));
  margin: 0 auto;
}

.research-hero {
  padding: 86px 0 58px;
  border-bottom: 1px solid var(--research-rule);
}

.research-kicker {
  margin-bottom: 16px;
  color: var(--research-accent);
  font-family: var(--research-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.research-hero h1 {
  max-width: 820px;
  margin: 0;
  font-family: var(--research-serif);
  font-size: clamp(44px, 8vw, 92px);
  font-weight: 500;
  line-height: 0.96;
  letter-spacing: 0;
}

.research-subtitle {
  max-width: 720px;
  margin: 24px 0 0;
  color: var(--research-muted);
  font-size: 21px;
  line-height: 1.45;
}

.research-intro {
  max-width: 840px;
  margin: 26px 0 0;
  font-size: 16px;
  line-height: 1.8;
}

.research-section-block {
  padding: 46px 0 58px;
  border-bottom: 1px solid var(--research-rule);
}

.research-section-block h2 {
  margin: 0 0 18px;
  color: var(--research-accent);
  font-family: var(--research-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.research-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.research-card,
.research-note {
  border: 1px solid var(--research-rule);
  background: rgba(255, 253, 248, 0.54);
}

.research-card {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 260px;
  padding: 22px;
}

.research-card h3 {
  margin: 0;
  font-family: var(--research-serif);
  font-size: 31px;
  font-weight: 500;
  line-height: 1.12;
}

.research-card p {
  margin: 18px 0 24px;
  color: var(--research-muted);
  line-height: 1.65;
}

.research-card-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.research-link {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 13px;
  border: 1px solid var(--research-ink);
  color: var(--research-ink);
  font-family: var(--research-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-decoration: none;
  text-transform: uppercase;
}

.research-link.secondary {
  border-color: var(--research-rule);
  color: var(--research-muted);
}

.research-link:hover,
.research-link:focus {
  border-color: var(--research-accent);
  color: var(--research-accent);
}

.research-note {
  padding: 20px;
}

.research-note h3 {
  margin: 0 0 12px;
  font-size: 18px;
}

.research-note p,
.research-note li {
  color: var(--research-muted);
  line-height: 1.65;
}

.research-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.research-list li {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--research-rule);
}

.research-list a {
  color: var(--research-ink);
  text-decoration: none;
}

.research-list a:hover,
.research-list a:focus {
  color: var(--research-accent);
}

.research-status {
  flex: 0 0 auto;
  color: var(--research-muted);
  font-family: var(--research-mono);
  font-size: 11px;
  text-transform: uppercase;
}

.research-footer {
  padding: 22px 0 34px;
  color: var(--research-muted);
  font-size: 13px;
}

.research-project-frame {
  background: var(--research-bg);
}

.research-project-frame .research-topbar {
  position: sticky;
}

@media (max-width: 760px) {
  .research-topbar {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 20px;
    gap: 10px;
  }

  .research-nav {
    flex-wrap: wrap;
    gap: 12px;
  }

  .research-shell {
    width: min(100% - 32px, 1120px);
  }

  .research-hero {
    padding: 54px 0 38px;
  }

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