:root {
  --primary: #0D2C54;
  --secondary: #1C4E80;
  --accent: #8DC63F;
  --highlight: #FF9F00;
  --text: #f8f9fa;
  --card-bg: rgba(255,255,255,0.1);
}

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.header {
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}

.header h1 {
  font-size: 2.5rem;
  background: linear-gradient(90deg, var(--accent), var(--highlight));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 1rem;
  text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.notice {
  display: inline-block;
  background: rgba(255,255,255,0.1);
  padding: 0.5rem 1rem;
  border-radius: 50px;
  font-size: 0.9rem;
  margin-bottom: 2rem;
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255,255,255,0.2);
}

.nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3rem;
}

.nav a {
  color: var(--text);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  transition: all 0.3s ease;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
}

.nav a:hover {
  background: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.article-container {
  background: rgba(13, 44, 84, 0.7);
  border-radius: 15px;
  padding: 3rem;
  margin-bottom: 3rem;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.1);
}

article h2 {
  font-size: 1.8rem;
  margin: 2rem 0 1.5rem;
  color: var(--accent);
  position: relative;
  padding-bottom: 0.5rem;
}

article h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--highlight));
}

article h3 {
  font-size: 1.4rem;
  margin: 1.5rem 0 1rem;
  color: var(--highlight);
}

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

.img-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.img-card {
  background: rgba(255,255,255,0.05);
  border-radius: 10px;
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.img-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0,0,0,0.2);
}

.img-card img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 10px 10px 0 0;
}

pre {
  background: rgba(0,0,0,0.3);
  border-radius: 8px;
  padding: 1.5rem;
  margin: 1.5rem 0;
  overflow-x: auto;
  border-left: 4px solid var(--accent);
  font-family: 'Courier New', monospace;
  font-size: 0.95rem;
  line-height: 1.5;
}

code {
  color: var(--highlight);
  font-family: 'Courier New', monospace;
}

.button-demo {
  display: inline-block;
  padding: 12px 24px;
  background: linear-gradient(45deg, var(--accent), var(--highlight));
  color: white;
  border: none;
  border-radius: 50px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
  margin: 1rem 0;
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.button-demo:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.2);
}

.button-demo:active {
  transform: scale(0.98);
}

.footer {
  text-align: center;
  margin-top: 3rem;
  padding: 2rem 0;
  border-top: 1px solid rgba(255,255,255,0.1);
}

@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }
  
  .article-container {
    padding: 2rem 1rem;
  }
  
  .img-grid {
    grid-template-columns: 1fr;
  }
}

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

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