:root {
  --primary-color: #1a1a1a;
  --secondary-color: #f5f5f5;
  --accent-blue: #00cfff;
  --accent-orange: #ffa500;
  --gradient-bg: linear-gradient(135deg, #1a1a1a 0%, #333333 100%);
  --card-bg: rgba(255, 255, 255, 0.05);
  --text-primary: rgba(255, 255, 255, 0.9);
  --text-secondary: rgba(255, 255, 255, 0.7);
  --border-radius: 12px;
  --box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--gradient-bg);
  background-attachment: fixed;
  padding: 0;
  margin: 0;
  overflow-x: hidden;
}

header {
  position: relative;
  padding: 2rem 5%;
  text-align: center;
  background: rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 3rem;
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
}

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

.subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 800px;
  margin: 0 auto 2rem;
}

.notice {
  background: rgba(0, 207, 255, 0.1);
  border: 1px solid var(--accent-blue);
  border-radius: var(--border-radius);
  padding: 1rem;
  margin: 2rem auto;
  max-width: 800px;
  text-align: center;
  font-size: 0.9rem;
}

.main-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 5%;
}

article {
  background: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 3rem;
  margin-bottom: 3rem;
  box-shadow: var(--box-shadow);
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

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

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

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

p {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--text-primary);
}

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

.image-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  aspect-ratio: 1/1;
}

.image-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.image-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

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

pre {
  background: rgba(0, 0, 0, 0.3);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  margin: 1.5rem 0;
  overflow-x: auto;
  border-left: 3px solid var(--accent-blue);
  font-family: 'Courier New', monospace;
  font-size: 0.95rem;
  line-height: 1.5;
}

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

ol, ul {
  margin-left: 2rem;
  margin-bottom: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

.nav-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 2rem 0;
}

.nav-link {
  padding: 0.8rem 1.5rem;
  background: rgba(0, 207, 255, 0.1);
  color: var(--accent-blue);
  border-radius: 30px;
  text-decoration: none;
  transition: var(--transition);
  border: 1px solid rgba(0, 207, 255, 0.3);
  font-weight: 500;
}

.nav-link:hover {
  background: rgba(0, 207, 255, 0.2);
  transform: translateY(-2px);
}

footer {
  text-align: center;
  padding: 2rem;
  margin-top: 3rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

@media (max-width: 768px) {
  article {
    padding: 2rem;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  .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;
}