:root {
  --primary: #0d1b2a;
  --secondary: #1b263b;
  --accent: #1fa2ff;
  --highlight: #4adc91;
  --text: #ffffff;
  --card-bg: rgba(27, 38, 59, 0.8);
}

* {
  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%;
  overflow-x: hidden;
}

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

.notice {
  background: rgba(255,255,255,0.1);
  padding: 15px;
  text-align: center;
  margin: 20px 0;
  border-radius: 8px;
  border-left: 4px solid var(--accent);
  font-size: 16px;
}

.header {
  text-align: center;
  padding: 60px 0 40px;
  position: relative;
}

.header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

h1, h2, h3, h4 {
  font-weight: 500;
  margin-bottom: 20px;
  color: var(--text);
}

h1 {
  font-size: 2.8rem;
  background: linear-gradient(90deg, var(--accent), var(--highlight));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 30px;
}

h2 {
  font-size: 2rem;
  position: relative;
  padding-bottom: 10px;
}

h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--accent);
}

h3 {
  font-size: 1.5rem;
  color: var(--accent);
}

p {
  margin-bottom: 20px;
  font-size: 17px;
}

article {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 40px;
  margin: 40px 0;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255,255,255,0.1);
}

code {
  font-family: 'Courier New', monospace;
  background: rgba(0,0,0,0.3);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 15px;
}

pre {
  background: rgba(0,0,0,0.3);
  padding: 20px;
  border-radius: 8px;
  margin: 20px 0;
  overflow-x: auto;
  border-left: 4px solid var(--accent);
}

pre code {
  background: transparent;
  padding: 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 30px;
  margin: 40px 0;
}

.card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 25px;
  transition: transform 0.3s, box-shadow 0.3s;
  border: 1px solid rgba(255,255,255,0.1);
}

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

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 20px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.2);
  transition: transform 0.3s;
}

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

.card h3 {
  margin-bottom: 15px;
  color: var(--accent);
}

.card p {
  margin-bottom: 15px;
}

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

.nav-link {
  color: var(--text);
  text-decoration: none;
  padding: 10px 20px;
  border-radius: 30px;
  background: rgba(31, 162, 255, 0.2);
  border: 1px solid var(--accent);
  transition: all 0.3s;
}

.nav-link:hover {
  background: var(--accent);
  transform: translateY(-3px);
}

.image-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
  margin: 40px 0;
}

.gallery-img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.2);
  transition: all 0.3s;
}

.gallery-img:hover {
  transform: scale(1.03);
  box-shadow: 0 10px 25px rgba(31, 162, 255, 0.4);
}

.highlight-box {
  background: rgba(31, 162, 255, 0.1);
  border-left: 4px solid var(--accent);
  padding: 20px;
  margin: 30px 0;
  border-radius: 0 8px 8px 0;
}

.highlight-box h4 {
  color: var(--accent);
  margin-bottom: 10px;
}

@media (max-width: 768px) {
  h1 {
    font-size: 2.2rem;
  }
  
  h2 {
    font-size: 1.8rem;
  }
  
  article {
    padding: 25px;
  }
  
  .grid {
    grid-template-columns: 1fr;
  }
}

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

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