.cosigo-nav {
  width: 100%;
  background: #ffffff;
  border-bottom: 1px solid #e5e5e5;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* =====================================================
   BRAND / LOGO
===================================================== */

.brand-wrap{
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.brand-text{
  font-weight: 600;
  letter-spacing: .5px;
  color: #111;
}

/* Proportional system mark */
.cosigo-nav .cosigo-mark{
  height: clamp(26px, 1.2vw, 32px);
  width: auto;
  display: block;
  opacity: .8;
  flex-shrink: 0;
}

.brand-wrap:hover .cosigo-mark{
  opacity: 1;
}

/* =====================================================
   NAV LINKS
===================================================== */

.nav-links {
  display: flex;
  gap: 18px;
}

.nav-links a {
  text-decoration: none;
  color: #333;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: #000;
}

/* =====================================================
   MOBILE
===================================================== */

@media (max-width: 768px) {
  .nav-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 8px;
  }
}