* { box-sizing: border-box; }

body {
  margin: 0;
  background: #fff;
  color: #17212f;
  font: 15px/1.4 Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.topbar {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 12px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid #e7ebf0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: #0064e0;
  color: #fff;
  font-size: 21px;
  font-weight: 750;
}

.brand-copy { display: grid; gap: 2px; }
.brand-copy strong { font-size: 12px; letter-spacing: .09em; }
.brand-copy span { color: #687588; font-size: 13px; }

.topbar-nav {
  display: flex;
  align-items: center;
  gap: 10px;
}

.topbar-nav a {
  padding: 10px 13px;
  border-radius: 9px;
  color: #334155;
  font-weight: 600;
  text-decoration: none;
}

.topbar-nav a:hover { background: #f2f6fb; }
.topbar-nav .nav-primary { color: #005bd1; }

@media (max-width: 520px) {
  .topbar { min-height: 68px; gap: 8px; padding-inline: 14px; }
  .brand { gap: 8px; }
  .brand-mark { width: 34px; height: 34px; border-radius: 10px; }
  .brand-copy strong { font-size: 10px; }
  .brand-copy span { font-size: 11px; }
  .topbar-nav { gap: 2px; }
  .topbar-nav a { padding: 9px 7px; font-size: 12px; }
  .login-detail { display: none; }
}