:root {
  --primary: #0f2027;
  --secondary: #203a43;
  --accent: #00d2ff;
  --highlight: #ff512f;
  --text: #ffffff;
  --bg-gradient: linear-gradient(135deg, var(--primary), var(--secondary), #2c5364);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Montserrat', sans-serif;
}

body {
  background: var(--bg-gradient);
  color: var(--text);
  line-height: 1.6;
  min-height: 100%;
  overflow-x: hidden;
}

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

header {
  position: relative;
  height: 80vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 40px;
  background: radial-gradient(circle at center, rgba(15,32,39,0.8), rgba(32,58,67,0.9));
  margin-bottom: 60px;
  border-radius: 0 0 20px 20px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.header-title {
  font-size: 3.5rem;
  margin-bottom: 20px;
  background: linear-gradient(90deg, var(--accent), var(--highlight));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.header-subtitle {
  font-size: 1.5rem;
  max-width: 800px;
  margin-bottom: 40px;
  opacity: 0.9;
}

.notice {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(255,255,255,0.1);
  padding: 10px 20px;
  border-radius: 30px;
  font-size: 0.9rem;
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255,255,255,0.2);
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(32,58,67,0.95);
  padding: 15px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0,210,255,0.2);
}

.nav-links {
  display: flex;
  gap: 30px;
}

.nav-link {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  position: relative;
  padding: 5px 0;
  transition: all 0.3s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.nav-link:hover::after {
  width: 100%;
}

.nav-link:hover {
  color: var(--accent);
}

article {
  padding: 40px 0;
}

h2 {
  font-size: 2.2rem;
  margin: 60px 0 30px;
  color: var(--accent);
  position: relative;
  padding-left: 20px;
}

h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  height: 60%;
  width: 5px;
  background: linear-gradient(to bottom, var(--accent), var(--highlight));
  border-radius: 5px;
}

h3 {
  font-size: 1.8rem;
  margin: 40px 0 20px;
  color: var(--text);
}

p {
  font-size: 1.1rem;
  margin-bottom: 20px;
  line-height: 1.8;
}

.code-container {
  background: rgba(15,32,39,0.8);
  border-radius: 10px;
  padding: 20px;
  margin: 30px 0;
  border-left: 4px solid var(--accent);
  overflow: auto;
}

pre {
  margin: 0;
}

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

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin: 40px 0;
}

.image-card {
  background: rgba(32,58,67,0.5);
  border-radius: 15px;
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.image-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0,210,255,0.2);
}

.image-card img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.image-caption {
  padding: 15px;
  text-align: center;
  background: rgba(15,32,39,0.7);
}

.button {
  display: inline-block;
  background: linear-gradient(45deg, var(--accent), var(--highlight));
  color: white;
  padding: 12px 30px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 600;
  margin: 20px 0;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0,210,255,0.3);
}

.button:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0,210,255,0.4);
}

footer {
  background: rgba(15,32,39,0.9);
  padding: 40px 0;
  text-align: center;
  margin-top: 60px;
  border-top: 1px solid rgba(0,210,255,0.2);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-bottom: 30px;
}

.footer-link {
  color: var(--text);
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-link:hover {
  color: var(--accent);
}

@media (max-width: 768px) {
  .header-title {
    font-size: 2.5rem;
  }
  
  .header-subtitle {
    font-size: 1.2rem;
  }
  
  .nav-links {
    gap: 15px;
  }
  
  h2 {
    font-size: 1.8rem;
  }
  
  h3 {
    font-size: 1.5rem;
  }
  
  .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;
}