/* ===== research-common.css =====
   Shared styles for Renue Research pages.
   Extracted from renue-research.html and renue-research-study.html.
*/

/* ── RBS Header ── */
.rbs-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #ffffff;
  border-bottom: 1px solid #D7D7D7;
}
.rbs-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.rbs-logo {
  font-family: 'Poppins', sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: #062F56;
  text-decoration: none;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.rbs-logo .rbs-logo-light {
  font-weight: 400;
}
.rbs-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}
.rbs-nav a {
  font-family: 'Poppins', sans-serif;
  font-size: 13px;
  font-weight: 600;
  color: #062F56;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  transition: color 0.2s;
}
.rbs-nav a:hover {
  color: #0f766e;
}
.rbs-nav a.rbs-nav-active {
  color: #0f766e;
  border-bottom: 2px solid #0f766e;
  padding-bottom: 2px;
}
.rbs-nav .rbs-nav-login {
  background: #062F56;
  color: #ffffff;
  padding: 8px 20px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border: none;
  cursor: pointer;
  transition: background 0.2s;
}
.rbs-nav .rbs-nav-login:hover {
  background: #041e3a;
}

/* ── RBS Hamburger ── */
.rbs-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}
.rbs-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: #062F56;
  transition: all 0.3s;
}

/* ── RBS Mobile Menu ── */
.rbs-mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: #ffffff;
  padding: 24px;
  border-bottom: 1px solid #D7D7D7;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  z-index: 999;
}
.rbs-mobile-menu.active { display: block; }
.rbs-mobile-menu a {
  display: block;
  font-family: 'Poppins', sans-serif;
  font-size: 15px;
  font-weight: 600;
  color: #062F56;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 12px 0;
  border-bottom: 1px solid #EBEBEB;
}
.rbs-mobile-menu a:last-child { border-bottom: none; }
@media (max-width: 768px) {
  .rbs-nav { display: none; }
  .rbs-hamburger { display: flex; }
}

/* ── Focus States ── */
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--primary, #062F56);
  outline-offset: 2px;
}