:root {
  color-scheme: dark;
  --bg: #071019;
  --panel: rgba(15, 29, 43, 0.88);
  --panel-soft: rgba(15, 29, 43, 0.58);
  --text: #e8f3ff;
  --muted: #9bb0c4;
  --line: rgba(127, 181, 255, 0.22);
  --accent: #72b7ff;
  --accent-strong: #b8dcff;
  --success: #84e5ba;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { background: var(--bg); }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 8%, rgba(33, 119, 199, 0.22), transparent 30rem),
    radial-gradient(circle at 85% 15%, rgba(68, 202, 169, 0.12), transparent 26rem),
    linear-gradient(180deg, #08131f 0%, #071019 55%, #050b11 100%);
  line-height: 1.65;
}

a { color: var(--accent-strong); }

a:hover { color: #ffffff; }

.research-shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 64px;
}

.research-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 42px;
}

.research-nav__brand {
  color: var(--text);
  font-weight: 800;
  text-decoration: none;
  letter-spacing: 0.02em;
}

.research-nav__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.research-nav__links a,
.paper-actions a {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(9, 20, 31, 0.68);
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}

.research-hero,
.paper-header {
  padding: clamp(26px, 5vw, 56px);
  border: 1px solid var(--line);
  border-radius: 26px;
  background: linear-gradient(145deg, rgba(19, 43, 66, 0.94), rgba(9, 20, 31, 0.9));
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.28);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--success);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.research-hero h1,
.paper-header h1 {
  max-width: 900px;
  margin: 0;
  font-size: clamp(2.25rem, 7vw, 5.2rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.research-hero p,
.paper-header p {
  max-width: 780px;
  margin: 22px 0 0;
  color: #c3d4e3;
  font-size: clamp(1rem, 2.2vw, 1.22rem);
}

.paper-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
  margin-top: 26px;
}

.research-card {
  display: flex;
  min-height: 280px;
  flex-direction: column;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.research-card:hover {
  transform: translateY(-4px);
  border-color: rgba(128, 196, 255, 0.6);
  background: rgba(21, 42, 62, 0.96);
}

.research-card__type {
  color: var(--success);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.research-card h2 {
  margin: 22px 0 12px;
  font-size: 1.55rem;
  line-height: 1.16;
}

.research-card p {
  margin: 0;
  color: var(--muted);
}

.research-card__meta {
  margin-top: auto;
  padding-top: 28px;
  color: var(--accent-strong);
  font-weight: 700;
}

.paper-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 26px;
  align-items: start;
  margin-top: 26px;
}

.paper-content,
.paper-aside {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--panel);
}

.paper-content {
  min-width: 0;
  padding: clamp(24px, 4vw, 52px);
}

.paper-aside {
  position: sticky;
  top: 18px;
  padding: 20px;
  color: var(--muted);
}

.paper-aside strong { color: var(--text); }

.markdown-body h1:first-child { display: none; }

.markdown-body h1,
.markdown-body h2,
.markdown-body h3 {
  color: var(--text);
  line-height: 1.18;
  letter-spacing: -0.025em;
  scroll-margin-top: 24px;
}

.markdown-body h2 {
  margin-top: 2.5em;
  padding-top: 0.8em;
  border-top: 1px solid var(--line);
  font-size: clamp(1.55rem, 3vw, 2.2rem);
}

.markdown-body h3 { margin-top: 2em; }

.markdown-body p,
.markdown-body li { color: #c7d5e2; }

.markdown-body blockquote {
  margin: 1.5rem 0;
  padding: 0.6rem 1.2rem;
  border-left: 4px solid var(--accent);
  background: var(--panel-soft);
  color: #d7e9f8;
}

.markdown-body pre {
  overflow-x: auto;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #03080d;
}

.markdown-body code {
  padding: 0.12em 0.36em;
  border-radius: 6px;
  background: rgba(116, 183, 255, 0.11);
  color: #d9efff;
}

.markdown-body pre code { padding: 0; background: transparent; }

.markdown-body table {
  display: block;
  width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
}

.markdown-body th,
.markdown-body td {
  padding: 10px 12px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.markdown-body th { background: rgba(114, 183, 255, 0.1); }

.loading,
.render-error {
  padding: 28px;
  border: 1px dashed var(--line);
  border-radius: 14px;
  color: var(--muted);
}

.research-footer {
  margin-top: 34px;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 820px) {
  .paper-layout { grid-template-columns: 1fr; }
  .paper-aside { position: static; }
}