/* Navigation */
#nav-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 2.2rem 1.5rem 1rem;
  background: linear-gradient(to bottom, rgba(0,0,0,0.9), transparent);
  backdrop-filter: blur(10px);
  pointer-events: none;
}

#nav-bar > * {
  pointer-events: auto;
}

.nav-btn {
  background: rgba(0,73,83,0.22);
  border: 1px solid rgba(165,172,175,0.28);
  color: var(--silver-bright);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .25s ease;
  backdrop-filter: blur(12px);
  cursor: pointer;
}

.nav-btn:hover {
  background: rgba(42,111,122,0.45);
  border-color: var(--accent-mid);
  box-shadow: none;
  transform: scale(1.08);
}

#brand-title {
  position: absolute;
  left: 50%;
  top: 2.2rem;
  transform: translateX(-50%);
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 1.45rem;
  letter-spacing: .01em;
  color: var(--silver-pure);
  display: flex;
  align-items: baseline;
  white-space: nowrap;
}

#brand-title b { font-weight: 600; }

/* "tech.de" in Akzentfarbe mit feiner Linie darunter */
#brand-title span {
  color: var(--accent-light);
  border-bottom: 1px solid var(--accent-mid);
  padding-bottom: 2px;
}

/* Funke über dem Schriftzug = Zugang zum Admin-Bereich */
#btn-admin {
  position: absolute;
  left: 50%;
  margin-left: -.8rem;
  top: -1.1rem;
  width: 1.6rem;
  height: 1.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  background: none;
  border: none;
  border-radius: 50%;
  color: var(--accent-light);
  font-size: .8rem;
  line-height: 1;
  cursor: pointer;
  filter: drop-shadow(0 0 5px rgba(92, 160, 171, .8));
  transition: transform .25s ease, color .25s ease, filter .25s ease;
}

#btn-admin:hover,
#btn-admin:focus-visible {
  color: var(--silver-bright);
  transform: scale(1.5) rotate(45deg);
  filter: drop-shadow(0 0 8px rgba(165, 172, 175, .9));
  outline: none;
}

#btn-back {
  opacity: 0;
  pointer-events: none;
  transform: scale(0.85);
  transition: opacity 0.3s ease, transform 0.25s ease;
}

body:not(.state-home) #btn-back {
  opacity: 1;
  pointer-events: auto;
  transform: scale(1);
}
.brand-icon {
  color: var(--accent-mid);
}