/* Specialized Network & Simulator Animations */

@keyframes packetPulse {
  0% {
    left: 0%;
    opacity: 0.2;
    transform: scale(0.8);
  }
  50% {
    opacity: 1;
    transform: scale(1.2);
    box-shadow: 0 0 15px var(--primary-cyan);
  }
  100% {
    left: 90%;
    opacity: 0.2;
    transform: scale(0.8);
  }
}

@keyframes signalGlow {
  0%, 100% {
    box-shadow: 0 0 5px rgba(56, 189, 248, 0.4);
    border-color: rgba(56, 189, 248, 0.4);
  }
  50% {
    box-shadow: 0 0 20px rgba(56, 189, 248, 0.9), 0 0 30px rgba(56, 189, 248, 0.6);
    border-color: var(--primary-cyan);
  }
}

@keyframes bitFlip {
  0% { transform: rotateX(0deg); }
  50% { transform: rotateX(90deg); color: var(--accent-green); }
  100% { transform: rotateX(0deg); }
}

@keyframes scanline {
  0% { transform: translateY(-100%); }
  100% { transform: translateY(1000%); }
}

/* Interactive Simulator Canvas Styles */
.simulator-box {
  background: #040711;
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin: 1.5rem 0;
  position: relative;
  overflow: hidden;
}

.sim-track {
  height: 60px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-sm);
  border: 1px dashed rgba(56, 189, 248, 0.2);
  display: flex;
  align-items: center;
  position: relative;
  padding: 0 10px;
  margin: 1rem 0;
}

.packet-node {
  width: 36px;
  height: 36px;
  background: var(--primary-cyan);
  color: #000;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  position: absolute;
  top: 12px;
  transition: all 0.5s ease-in-out;
  box-shadow: 0 0 12px var(--primary-cyan);
}

.node-host {
  width: 80px;
  height: 70px;
  background: rgba(16, 23, 42, 0.9);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-main);
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}

.node-host.active {
  border-color: var(--primary-cyan);
  animation: signalGlow 2s infinite ease-in-out;
}

/* OSI Encapsulation Layer Visualizer */
.osi-stack {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 1rem 0;
}

.osi-layer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  background: rgba(16, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
  font-size: 0.9rem;
}

.osi-layer:hover, .osi-layer.active {
  background: rgba(56, 189, 248, 0.12);
  border-color: var(--primary-cyan);
  transform: translateX(6px);
}

.pdu-badge {
  font-family: var(--font-code);
  font-size: 0.75rem;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--accent-amber);
}

/* Subnet Bit Visualizer Grid */
.binary-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 1rem 0;
  font-family: var(--font-code);
}

.bit-box {
  width: 32px;
  height: 38px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(16, 23, 42, 0.8);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 0.85rem;
  font-weight: 600;
  user-select: none;
}

.bit-box.net-bit {
  background: rgba(56, 189, 248, 0.2);
  border-color: var(--primary-cyan);
  color: var(--primary-cyan);
}

.bit-box.host-bit {
  background: rgba(52, 211, 153, 0.15);
  border-color: var(--accent-green);
  color: var(--accent-green);
}

.octet-separator {
  display: flex;
  align-items: center;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text-dim);
  padding: 0 4px;
}