:root {
  --primary-color: #0f2027;
  --secondary-color: #203a43;
  --accent-color: #f06595;
  --text-color: #e0e0e0;
  --card-bg: rgba(255, 255, 255, 0.1);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

body {
  font-family: 'Roboto', sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color), #2c5364);
  margin: 0;
  padding: 0;
  min-height: 100%;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
}

.header {
  text-align: center;
  margin-bottom: 60px;
  position: relative;
}

.header::after {
  content: "";
  display: block;
  width: 100px;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-color), transparent);
  margin: 20px auto;
}

h1, h2, h3, h4 {
  font-weight: 700;
  color: white;
  margin-top: 2rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; border-left: 4px solid var(--accent-color); padding-left: 15px; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.2rem; }

p {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
}

.article-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.article-section {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border-radius: 15px;
  padding: 30px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  transition: var(--transition);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.article-section:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
}

.code-block {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 8px;
  padding: 20px;
  margin: 20px 0;
  overflow-x: auto;
  border-left: 3px solid var(--accent-color);
}

code {
  font-family: 'Courier New', monospace;
  color: #f8f8f2;
  background: rgba(0, 0, 0, 0.2);
  padding: 2px 5px;
  border-radius: 3px;
}

pre code {
  display: block;
  white-space: pre;
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin: 30px 0;
}

.image-card {
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  transition: var(--transition);
  position: relative;
}

.image-card:hover {
  transform: scale(1.03);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.image-card img {
  width: 100%;
  height: auto;
  display: block;
  transition: var(--transition);
}

.image-card:hover img {
  transform: scale(1.1);
}

.note {
  background: rgba(240, 101, 149, 0.1);
  border-left: 4px solid var(--accent-color);
  padding: 15px;
  margin: 20px 0;
  border-radius: 0 5px 5px 0;
}

.navigation {
  position: sticky;
  top: 20px;
  margin-bottom: 40px;
}

.nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-item {
  margin-bottom: 10px;
}

.nav-link {
  display: block;
  padding: 10px 15px;
  color: var(--text-color);
  text-decoration: none;
  border-radius: 5px;
  transition: var(--transition);
  background: rgba(255, 255, 255, 0.05);
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  transform: translateX(5px);
}

@media (max-width: 768px) {
  .container {
    padding: 20px 15px;
  }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }
  h3 { font-size: 1.3rem; }
  
  .article-section {
    padding: 20px;
  }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.floating {
  animation: float 3s ease-in-out infinite;
}

.reference-note {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 10px 15px;
  border-radius: 5px;
  z-index: 1000;
  font-size: 0.9rem;
}