:root {
  --bg-color: #1e1e2e;
  --panel-bg: #252542;
  --text-color: #f8f8f2;
  --accent-color: #bd93f9;
  --border-color: #44475a;
  --hover-color: rgba(189, 147, 249, 0.2);
  --node-shadow: 0 0 15px rgba(0, 0, 0, 0.3);
  --panel-shadow: 0 5px 20px rgba(0, 0, 0, 0.4);
  
  /* Component colors */
  --llm-color: #ff79c6;
  --resources-color: #50fa7b;
  --prompts-color: #bd93f9;
  --tools-color: #ffb86c;
  --sampling-color: #8be9fd;
  --transports-color: #f1fa8c;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  background: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
}

header {
  text-align: center;
  margin-bottom: 2rem;
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  background: linear-gradient(90deg, var(--llm-color), var(--resources-color), var(--prompts-color), var(--tools-color), var(--sampling-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-fill-color: transparent;
}

.subtitle {
  font-size: 1.2rem;
  opacity: 0.8;
  max-width: 800px;
  margin: 0 auto;
}

.protocol-diagram {
  width: 100%;
  height: 700px;
  background: var(--panel-bg);
  border-radius: 12px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--panel-shadow);
  border: 1px solid var(--border-color);
  margin-bottom: 2rem;
  cursor: grab;
  touch-action: none;
}

.protocol-diagram:active {
  cursor: grabbing;
}

.backdrop {
  position: absolute;
  width: 100%;
  height: 100%;
  opacity: 0.1;
  background-image: radial-gradient(circle at 50% 50%, rgba(189, 147, 249, 0.3) 0%, transparent 70%);
  pointer-events: none;
}

.node {
  position: absolute;
  width: 130px;
  height: 130px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  border: 3px solid transparent;
  box-shadow: var(--node-shadow);
  z-index: 5;
  flex-direction: column;
  padding: 1rem;
  text-align: center;
  font-size: 1.1rem;
  user-select: none;
}

.node:hover {
  transform: scale(1.1);
  z-index: 10;
  box-shadow: 0 0 25px rgba(0, 0, 0, 0.5);
}

.node-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.connection {
  position: absolute;
  height: 3px;
  background: var(--border-color);
  transform-origin: left center;
  pointer-events: none;
  transition: background-color 0.3s ease;
  opacity: 0.6;
  z-index: 1;
}

.connection.active {
  background: var(--accent-color);
  opacity: 1;
  box-shadow: 0 0 10px rgba(189, 147, 249, 0.5);
  height: 4px;
}

.tooltip {
  position: absolute;
  background: rgba(30, 30, 46, 0.95);
  padding: 1rem;
  border-radius: 8px;
  display: none;
  z-index: 100;
  max-width: 300px;
  border: 1px solid var(--border-color);
  box-shadow: var(--panel-shadow);
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.info-panel {
  margin-top: 2rem;
  padding: 0;
  background: var(--panel-bg);
  border-radius: 12px;
  display: none;
  overflow: hidden;
  box-shadow: var(--panel-shadow);
  border: 1px solid var(--border-color);
  margin-bottom: 2rem;
  max-height: 0;
  transition: max-height 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.info-panel.visible {
  display: block;
  max-height: 1000px;
}

.info-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  background-color: rgba(0, 0, 0, 0.2);
}

.info-content {
  padding: 1.5rem;
}

#closePanel {
  background: none;
  border: none;
  color: var(--text-color);
  font-size: 1.5rem;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity 0.2s ease;
}

#closePanel:hover {
  opacity: 1;
}

.active {
  border-color: var(--accent-color);
  box-shadow: 0 0 20px rgba(189, 147, 249, 0.4);
}

h2 {
  color: var(--accent-color);
  margin-bottom: 1rem;
}

h3 {
  margin: 1.5rem 0 1rem;
  font-size: 1.2rem;
  color: var(--accent-color);
}

.info-content p {
  margin-bottom: 1rem;
  line-height: 1.6;
}

.info-content ul {
  margin: 1rem 0 1.5rem 1.5rem;
}

.info-content li {
  margin-bottom: 0.5rem;
}

.info-content code {
  background: rgba(0, 0, 0, 0.2);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-family: 'Fira Code', 'Courier New', monospace;
  font-size: 0.9rem;
}

.example-block {
  background: rgba(0, 0, 0, 0.2);
  border-radius: 8px;
  padding: 1rem;
  margin: 1rem 0;
  border-left: 3px solid var(--accent-color);
}

.controls {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

button {
  background: var(--panel-bg);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-weight: 500;
}

button:hover {
  background: var(--hover-color);
  border-color: var(--accent-color);
}

footer {
  text-align: center;
  margin-top: 3rem;
  opacity: 0.7;
  font-size: 0.9rem;
}

footer a {
  color: var(--accent-color);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

.tag {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
  font-size: 0.8rem;
  background: rgba(189, 147, 249, 0.2);
  border: 1px solid rgba(189, 147, 249, 0.3);
  cursor: pointer;
  transition: all 0.2s ease;
}

.tag:hover {
  background: rgba(189, 147, 249, 0.4);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.feature-item {
  background: rgba(0, 0, 0, 0.2);
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.feature-item h4 {
  margin-bottom: 0.5rem;
  color: var(--accent-color);
}

/* Loading overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(30, 30, 46, 0.9);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 5px solid rgba(189, 147, 249, 0.3);
  border-radius: 50%;
  border-top-color: var(--accent-color);
  animation: spin 1s ease-in-out infinite;
  margin-bottom: 1rem;
}

.loading-text {
  font-size: 1.2rem;
  color: var(--accent-color);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Animation for node appearance */
@keyframes fadeIn {
  from { opacity: 0; transform: scale(0.8); }
  to { opacity: 1; transform: scale(1); }
}

.node {
  animation: fadeIn 0.5s ease-out forwards;
}

/* Add delay to nodes so they appear sequentially */
.node:nth-child(1) { animation-delay: 0.1s; }
.node:nth-child(2) { animation-delay: 0.2s; }
.node:nth-child(3) { animation-delay: 0.3s; }
.node:nth-child(4) { animation-delay: 0.4s; }
.node:nth-child(5) { animation-delay: 0.5s; }
.node:nth-child(6) { animation-delay: 0.6s; }

@media (max-width: 768px) {
  .container {
    padding: 1rem;
  }
  
  .protocol-diagram {
    height: 600px;
  }
  
  .node {
    width: 100px;
    height: 100px;
    font-size: 0.9rem;
  }
  
  h1 {
    font-size: 1.8rem;
  }
}