/* placeholder.css - Blackhole Timeline Placeholder */
.timeline-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  pointer-events: auto;
  overflow: hidden;
}

.bhp-stage {
  width: calc(100% - 120px);
  max-width: 1000px;
  height: calc(100vh - 200px);
  background: var(--color-card-bg);
  backdrop-filter: blur(var(--card-blur));
  border-radius: var(--card-radius);
  border: 1px solid var(--color-card-border);
  box-shadow: var(--card-shadow);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

#bhpCanvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 1;
}

.bhp-content {
  position: relative;
  z-index: 3;
  text-align: center;
  max-width: 600px;
  padding: 40px;
}

.bhp-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-title);
  margin-bottom: 16px;
  text-shadow: 0 0 30px var(--color-accent-glow);
  background: linear-gradient(45deg, var(--color-white), var(--color-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.bhp-subtitle {
  font-size: 1.1rem;
  color: var(--color-desc);
  margin-bottom: 32px;
  opacity: 0.9;
  line-height: 1.5;
}

.bhp-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.bhp-btn {
  padding: 12px 24px;
  border-radius: 50px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  font-family: inherit;
}

.bhp-btn span {
  position: relative;
  z-index: 2;
}

.bhp-btn-primary {
  background: linear-gradient(45deg, var(--color-purple), #ff4ca3);
  color: var(--color-bg);
  box-shadow: 0 0 20px var(--color-accent-shadow);
}

.bhp-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px var(--color-accent-shadow);
}

.bhp-btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
}

.bhp-btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
  box-shadow: 0 0 20px var(--color-accent-glow);
}

.bhp-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 2;
  pointer-events: none;
  animation: bhpPulse 4s ease-in-out infinite;
}

@keyframes bhpPulse {
  0%, 100% { opacity: 0.3; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 0.6; transform: translate(-50%, -50%) scale(1.1); }
}

/* Responsive */
@media (max-width: 768px) {
  .bhp-stage {
    width: calc(100% - 40px);
    height: calc(100vh - 120px);
  }
  
  .bhp-content {
    padding: 30px 20px;
  }
  
  .bhp-title {
    font-size: 2rem;
  }
  
  .bhp-subtitle {
    font-size: 1rem;
  }
  
  .bhp-actions {
    flex-direction: column;
    align-items: center;
  }
  
  .bhp-btn {
    width: 200px;
  }
}

@media (max-width: 480px) {
  .bhp-stage {
    width: calc(100% - 20px);
    height: auto;
    min-height: 400px;
  }
  
  .bhp-title {
    font-size: 1.6rem;
  }
}