:root {
  --primary-color: #1E272E;
  --secondary-color: #2C3E50;
  --accent-color: #00FFD5;
  --highlight-color: #6A11CB;
  --text-color: #ffffff;
  --card-bg: rgba(255, 255, 255, 0.1);
  --card-hover-bg: rgba(255, 255, 255, 0.2);
  --shadow-light: 0 4px 8px rgba(0, 0, 0, 0.2);
  --shadow-heavy: 0 8px 16px rgba(0, 0, 0, 0.4);
}

body {
  margin: 0;
  font-family: 'Roboto', sans-serif;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--text-color);
  line-height: 1.6;
}

header {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(5px);
  z-index: 1000;
  padding: 10px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header nav a {
  color: var(--accent-color);
  text-decoration: none;
  margin: 0 10px;
  font-size: 16px;
  transition: color 0.3s ease;
}

header nav a:hover {
  color: var(--highlight-color);
}

.container {
  max-width: 1200px;
  margin: 80px auto 20px;
  padding: 0 20px;
}

h1, h2, h3 {
  font-weight: bold;
  color: var(--accent-color);
}

.card {
  background: var(--card-bg);
  border-radius: 10px;
  padding: 20px;
  box-shadow: var(--shadow-light);
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.card:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-heavy);
  background: var(--card-hover-bg);
}

.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
}

.button {
  display: inline-block;
  padding: 10px 20px;
  background: var(--highlight-color);
  color: var(--text-color);
  border-radius: 5px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.button:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-heavy);
}

.network-diagram {
  filter: blur(2px);
  opacity: 0.8;
  transition: all 0.5s ease;
}

.network-diagram:hover {
  filter: blur(0);
  opacity: 1;
}

@media (max-width: 768px) {
  .grid-container {
    grid-template-columns: 1fr;
  }
  .card {
    padding: 15px;
  }
}

@media (max-width: 480px) {
  header nav a {
    font-size: 14px;
  }
}

code {
  display: block;
  background: rgba(0, 0, 0, 0.5);
  color: var(--accent-color);
  padding: 10px;
  border-radius: 5px;
  overflow-x: auto;
}

footer {
  text-align: center;
  padding: 20px;
  font-size: 14px;
}