:root {
  --primary-gradient: linear-gradient(135deg, #0d47a1, #6a1b9a);
  --secondary-gradient: linear-gradient(45deg, #2196f3, #21cbf3);
  --accent-gradient: linear-gradient(45deg, #ff9800, #ff5722);
  --dark-bg: rgba(13, 71, 161, 0.8);
  --light-bg: rgba(255, 255, 255, 0.1);
  --text-light: #ffffff;
  --text-secondary: #9e9e9e;
  --accent-color: #ffeb3b;
  --font-main: 'Roboto', sans-serif;
  --font-heading: 'Montserrat', sans-serif;
  --border-radius: 10px;
  --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  --transition: all 0.3s ease;
}

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@600;700&family=Roboto:wght@300;400;500&display=swap');

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

body {
  background: var(--primary-gradient);
  color: var(--text-light);
  font-family: var(--font-main);
  line-height: 1.6;
  padding-top: 80px;
  min-height: 100%;
}

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

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--dark-bg);
  backdrop-filter: blur(10px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  z-index: 1000;
  box-shadow: 0 2px 15px rgba(0, 0, 0, 0.3);
}

.nav-logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  background: var(--secondary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

.nav-link {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.nav-link:hover {
  background: var(--accent-gradient);
  transform: translateY(-2px);
}

.header {
  text-align: center;
  padding: 4rem 0;
  position: relative;
  overflow: hidden;
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 70% 30%, rgba(106, 27, 154, 0.3), transparent 60%);
  z-index: -1;
}

.header h1 {
  font-family: var(--font-heading);
  font-size: 3rem;
  margin-bottom: 1.5rem;
  background: linear-gradient(90deg, #ffffff, #ffeb3b);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.header p {
  max-width: 700px;
  margin: 0 auto 2rem;
  font-size: 1.1rem;
  color: var(--text-secondary);
}

.notice {
  background: rgba(255, 255, 255, 0.1);
  padding: 1rem;
  border-radius: var(--border-radius);
  margin: 2rem auto;
  max-width: 800px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.notice p {
  color: var(--accent-color);
  font-weight: 500;
}

.article-container {
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--border-radius);
  padding: 3rem;
  margin: 3rem 0;
  box-shadow: var(--box-shadow);
  backdrop-filter: blur(5px);
}

article {
  max-width: 900px;
  margin: 0 auto;
}

article h2 {
  font-family: var(--font-heading);
  font-size: 2rem;
  margin: 2rem 0 1.5rem;
  color: var(--text-light);
  position: relative;
  padding-bottom: 0.5rem;
}

article h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100px;
  height: 3px;
  background: var(--accent-gradient);
}

article h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  margin: 1.5rem 0 1rem;
  color: var(--text-light);
}

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

article strong {
  color: var(--accent-color);
}

pre {
  background: rgba(0, 0, 0, 0.3);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  margin: 1.5rem 0;
  overflow-x: auto;
  box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.5);
  border-left: 3px solid var(--accent-color);
}

code {
  font-family: 'Courier New', monospace;
  color: #ff9800;
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

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

.image-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.image-card img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.image-caption {
  padding: 1rem;
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.button {
  display: inline-block;
  background: var(--secondary-gradient);
  color: var(--text-light);
  padding: 0.75rem 1.5rem;
  border-radius: 25px;
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  margin: 1rem 0;
  border: none;
  cursor: pointer;
}

.button:hover {
  background: var(--accent-gradient);
  transform: scale(1.05);
}

.footer {
  text-align: center;
  padding: 2rem 0;
  margin-top: 3rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    padding: 1rem;
  }
  
  .nav-links {
    margin-top: 1rem;
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .header h1 {
    font-size: 2rem;
  }
  
  article h2 {
    font-size: 1.5rem;
  }
  
  .article-container {
    padding: 2rem 1rem;
  }
  
  .image-grid {
    grid-template-columns: 1fr;
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

.floating {
  animation: float 6s ease-in-out infinite;
}