:root {
  --bg: #0c0f16;
  --surface: #151a24;
  --surface-alt: #101521;
  --ink: #f4f6ff;
  --muted: rgba(244, 246, 255, 0.65);
  --accent: #5bc0f8;
  --border: rgba(244, 246, 255, 0.12);
  --radius: 32px;
  --transition: 0.4s ease;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: radial-gradient(circle at top, #172032, #090c12);
  color: var(--ink);
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.skip {
  position: absolute;
  left: 50%;
  transform: translate(-50%, -140%);
  background: var(--ink);
  color: #01030a;
  padding: 0.4rem 1.2rem;
  border-radius: 999px;
  transition: transform 0.3s ease;
  z-index: 40;
}

.skip:focus {
  transform: translate(-50%, 20%);
}

.research-header {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem clamp(1rem, 5vw, 4rem);
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(9, 12, 18, 0.75);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.logo-stack {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
}

.logo {
  font-family: 'Playfair Display', serif;
  font-size: 1.3rem;
  letter-spacing: 0.08em;
}

.page-label {
  font-size: 0.85rem;
  color: var(--muted);
}

.research-nav {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.95rem;
}

.research-nav a {
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  color: var(--muted);
  transition: background var(--transition), color var(--transition);
}

.research-nav a:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--ink);
}

.ghost-btn {
  border-radius: 999px;
  padding: 0.6rem 1.3rem;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--ink);
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.ghost-btn:hover {
  background: rgba(255, 255, 255, 0.12);
}

.research-main {
  width: min(1100px, 92vw);
  margin: 0 auto;
  padding: clamp(2rem, 6vw, 4rem) 0 4rem;
}

.panel {
  background: var(--surface);
  border-radius: var(--radius);
  padding: clamp(2rem, 5vw, 3.2rem);
  margin-bottom: 2rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 50px 80px rgba(0, 0, 0, 0.4);
}

.chip {
  text-transform: uppercase;
  letter-spacing: 0.35em;
  font-size: 0.7rem;
  color: var(--muted);
  margin-bottom: 1rem;
}

.embed {
  background: var(--surface-alt);
}

.embed-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-end;
  margin-bottom: 1.5rem;
}

.embed-header h2 {
  margin: 0.2rem 0 0;
}

.pill-link {
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 0.45rem 1.4rem;
  border-radius: 999px;
  font-size: 0.9rem;
  transition: background var(--transition), color var(--transition);
}

.pill-link:hover {
  background: rgba(255, 255, 255, 0.18);
}

.embed-frame {
  border-radius: 26px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: #05070c;
}

.embed-frame iframe {
  width: 100%;
  min-height: 70vh;
  border: none;
  display: block;
}

.research-footer {
  width: min(1100px, 92vw);
  margin: 0 auto 3rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  color: var(--muted);
}

.footer-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

@media (max-width: 720px) {
  .research-header {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .research-nav {
    justify-content: center;
  }
  .ghost-btn {
    justify-self: center;
  }
  .embed-frame iframe {
    min-height: 60vh;
  }
}