:root {
  --primary-color: #0d47a1;
  --secondary-color: #7b1fa2;
  --accent-color-success: #43a047;
  --accent-color-warning: #fdd835;
  --text-light: #ffffff;
  --text-dark: #121212;
  --card-bg-light: #ffffff;
  --card-bg-dark: #1e1e1e;
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Montserrat', 'Open Sans', sans-serif;
  background: radial-gradient(circle at center, var(--primary-color), var(--secondary-color));
  color: var(--text-light);
  line-height: 1.6;
}

.header {
  text-align: center;
  padding: 60px 20px 40px;
  background: linear-gradient(135deg, rgba(13, 71, 161, 0.9), rgba(123, 31, 162, 0.9));
  margin-bottom: 40px;
  border-bottom: 3px solid var(--accent-color-warning);
}

.header h1 {
  font-size: 2.8rem;
  margin: 0;
  background: linear-gradient(90deg, var(--text-light), var(--accent-color-warning));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.header p {
  font-size: 1.2rem;
  max-width: 800px;
  margin: 20px auto;
  opacity: 0.9;
}

.notice {
  background: rgba(255,255,255,0.1);
  padding: 15px;
  border-radius: 8px;
  text-align: center;
  margin: 20px auto;
  max-width: 800px;
  border: 1px solid var(--accent-color-warning);
}

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

article {
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(10px);
  border-radius: 15px;
  padding: 40px;
  margin-bottom: 60px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

article h2 {
  color: var(--accent-color-warning);
  font-size: 2rem;
  margin-top: 40px;
  position: relative;
  padding-bottom: 15px;
}

article h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-color-warning), transparent);
}

article h3 {
  color: var(--text-light);
  font-size: 1.5rem;
  margin-top: 30px;
}

article p {
  font-size: 1.1rem;
  margin: 20px 0;
}

pre {
  background: rgba(30,30,30,0.8);
  border-radius: 8px;
  padding: 20px;
  overflow-x: auto;
  margin: 25px 0;
  border-left: 4px solid var(--accent-color-success);
}

code {
  font-family: 'Courier New', monospace;
  color: #f8f8f2;
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 25px;
  margin: 40px 0;
}

.image-card {
  background: rgba(255,255,255,0.1);
  border-radius: 12px;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  height: 320px;
}

.image-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0,0,0,0.3);
}

.image-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.image-card:hover img {
  transform: scale(1.05);
}

.nav-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 15px;
  margin: 40px 0;
}

.nav-link {
  padding: 12px 25px;
  background: rgba(255,255,255,0.1);
  border-radius: 30px;
  color: var(--text-light);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  border: 1px solid rgba(255,255,255,0.2);
}

.nav-link:hover {
  background: var(--accent-color-success);
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(67, 160, 71, 0.4);
}

.footer {
  text-align: center;
  padding: 30px;
  margin-top: 60px;
  background: rgba(0,0,0,0.2);
  border-top: 1px solid rgba(255,255,255,0.1);
}

@media (max-width: 768px) {
  .header h1 {
    font-size: 2rem;
  }
  
  article {
    padding: 25px;
  }
  
  .image-grid {
    grid-template-columns: 1fr;
  }
}

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

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