h1 {
  text-align: center;
}

.research-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem 0rem;
}

.research-header {
  display: flex;
  justify-content: center;
  margin: 2.5rem 0 2.5rem;
}

.research-header-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
}

.research-section {
  max-width: 1200px;
  margin: auto;
}

.research-tabs {
  display: flex;
  gap: 2rem;
}

.research-tab {
  background: transparent;
  border: none;
  color: #9ca3af;
  font-size: 1.05rem;
  font-weight: 600;
  padding: 0.3rem 0;
  cursor: pointer;
  position: relative;
}

.research-tab.active {
  color: #38bdf8;
}

.research-tab.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 3px;
  border-radius: 999px;
  background: #38bdf8;
}

.year-filter {
  padding: 0.55rem 0.9rem;
  border-radius: 10px;
  background: #0b122b;
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.25);
  font-size: 0.95rem;
}

.research-panel[hidden] {
  display: none;
}

.research-card {
  position: relative;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 16px;
  padding: 2.4rem 2.6rem;
  margin: 0 1.25rem 2.5rem;
  backdrop-filter: blur(8px);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.research-card:hover {
  transform: translateY(-4px);
  box-shadow:
    0 14px 35px rgba(15, 23, 42, 0.55),
    0 0 0 1px rgba(56, 189, 248, 0.35),
    0 0 24px rgba(56, 189, 248, 0.25);
  border-color: rgba(56, 189, 248, 0.6);
}

.year-badge {
  position: absolute;
  top: -12px;
  right: 18px;
  background: #38bdf8;
  color: #020617;
  font-weight: 800;
  font-size: 0.85rem;
  padding: 0.35rem 0.6rem;
  border-radius: 999px;
}

.research-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.35rem;
  line-height: 1.35;
}

.research-meta {
  margin: 0 0 0.8rem;
  color: #cbd5e1;
  font-size: 0.95rem;
}

.research-card p {
  margin: 0 0 1.6rem;
  line-height: 1.65;
  color: #e5e7eb;
}

.research-actions {
  display: flex;
  gap: 0.8rem;
}


.pdf-link {
  color: #38bdf8;
  font-weight: 600;
  text-decoration: none;
  font-size: 0.95rem;
}

.pdf-link:hover {
  text-decoration: underline;
}