/* ==========================================================
   COLD OPEN OVERLAY (Erstbesucher)
   ========================================================== */

.cold-open {
  position: fixed;
  inset: 0;
  background: #000;
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  transition: opacity 0.6s ease;
}

.cold-open.hidden {
  opacity: 0;
  pointer-events: none;
}

.cold-open-screen {
  max-width: 640px;
  width: 100%;
  padding: 40px 20px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  line-height: 2;
  color: var(--color-text-dim);
}

.cold-open-line {
  opacity: 0;
  display: block;
  transition: opacity 0.15s ease;
}

.cold-open-line.visible {
  opacity: 1;
}

.cold-open-line.nexus { color: var(--color-nexus); }
.cold-open-line.cipher { color: var(--color-cipher); }
.cold-open-line.system { color: rgba(255,255,100,0.7); }
.cold-open-line.dim { color: rgba(255,255,255,0.2); font-size: 0.65rem; }

.cold-open-enter {
  display: none;
  margin-top: 32px;
  background: none;
  border: 1px solid var(--color-nexus);
  color: var(--color-nexus);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 14px 28px;
  cursor: pointer;
  animation: pulseGlow 1.5s ease-in-out infinite;
}

.cold-open-enter.is-visible {
  display: block;
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 8px rgba(0,255,65,0.3); }
  50%       { box-shadow: 0 0 20px rgba(0,255,65,0.6); }
}

.cold-open-enter:hover {
  background: var(--color-nexus);
  color: #000;
}

.cold-open-skip {
  position: fixed;
  bottom: 20px;
  right: 20px;
}

.cold-open-skip button {
  background: none;
  border: none;
  color: rgba(255,255,255,0.2);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  cursor: pointer;
  text-transform: uppercase;
}

.cold-open-skip button:hover { color: rgba(255,255,255,0.5); }