.nav-btn {
  display: inline-block;
  padding: 13px 26px;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(190, 212, 255, 0.90);
  white-space: nowrap;
  background: rgba(255, 255, 255, 0.055);
  border-radius: 15px;
  border: 1px solid var(--color-border-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.07), 0 4px 30px var(--color-shadow-deep);
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.nav-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(80, 130, 255, 0.12) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-normal);
  border-radius: 15px;
}

.nav-btn:hover::before { opacity: 1; }

.nav-btn:hover {
  background: rgba(50, 90, 255, 0.15);
  border-color: var(--color-border-hover);
  color: #ffffff;
  box-shadow: 0 0 25px var(--color-glow-btn), inset 0 1px 0 rgba(255, 255, 255, 0.12), 0 6px 30px var(--color-shadow-deep);
  transform: translateY(-3px);
}

.nav-btn:active  { transform: translateY(-1px); transition: transform 0.1s ease; }
.nav-btn:focus-visible { outline: 2px solid rgba(100, 160, 255, 0.6); outline-offset: 3px; }


@media (max-width: 600px) {
  .nav-btn {
    background: rgba(9, 27, 55, 0.68);
    color: #ffffff;
    letter-spacing: normal;
  }
}