:root {
  --primary: #121212;
  --secondary: #1E1E1E;
  --accent: #3498DB;
  --accent2: #3EDC8F;
  --text: #ECF0F1;
  --highlight: #8E44AD;
}

body {
  background: var(--primary);
  color: var(--text);
  font-family: 'Roboto', sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  min-height: 100%;
}

.header {
  background: linear-gradient(135deg, var(--primary), #2C2C2C);
  padding: 2rem 0;
  text-align: center;
  border-bottom: 1px solid rgba(62, 220, 143, 0.2);
  position: relative;
  overflow: hidden;
}

.header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 20% 50%, rgba(52, 152, 219, 0.1), transparent 70%);
}

.header h1 {
  font-size: 2.5rem;
  margin: 0;
  background: linear-gradient(to right, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 20px rgba(52, 152, 219, 0.3);
  position: relative;
  z-index: 1;
}

.notice {
  background: rgba(30, 30, 30, 0.8);
  border-left: 4px solid var(--accent);
  padding: 1rem;
  margin: 2rem auto;
  max-width: 800px;
  border-radius: 0 8px 8px 0;
  font-size: 0.9rem;
}

.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

.article {
  background: var(--secondary);
  border-radius: 12px;
  padding: 3rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  margin-bottom: 3rem;
  position: relative;
}

.article::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 5%;
  width: 90%;
  height: 10px;
  background: linear-gradient(to right, var(--accent), var(--accent2));
  filter: blur(10px);
  opacity: 0.5;
  z-index: -1;
}

h2 {
  color: var(--accent);
  font-size: 1.8rem;
  margin-top: 2.5rem;
  position: relative;
  padding-bottom: 0.5rem;
}

h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(to right, var(--accent), var(--accent2));
}

h3 {
  color: var(--accent2);
  font-size: 1.4rem;
  margin-top: 2rem;
}

p {
  margin: 1.5rem 0;
  font-size: 1.1rem;
}

pre {
  background: #1A1A1A;
  border-radius: 8px;
  padding: 1.5rem;
  overflow-x: auto;
  margin: 2rem 0;
  border-left: 4px solid var(--accent);
  box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.5);
}

code {
  font-family: 'Courier New', monospace;
  color: #F8F8F2;
  font-size: 0.95rem;
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

.image-card {
  background: var(--secondary);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s, box-shadow 0.3s;
}

.image-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.image-card img {
  width: 100%;
  height: auto;
  display: block;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.image-caption {
  padding: 1rem;
  text-align: center;
  font-size: 0.9rem;
  color: rgba(236, 240, 241, 0.7);
}

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

.nav-tab {
  padding: 0.8rem 1.5rem;
  margin: 0.5rem;
  background: var(--secondary);
  border-radius: 30px;
  color: var(--text);
  text-decoration: none;
  transition: all 0.3s;
  border: 1px solid rgba(52, 152, 219, 0.3);
}

.nav-tab:hover {
  background: var(--accent);
  color: var(--primary);
  box-shadow: 0 0 15px rgba(52, 152, 219, 0.5);
}

.summary {
  background: rgba(30, 30, 30, 0.7);
  border-radius: 8px;
  padding: 1.5rem;
  margin: 2rem 0;
  border-left: 4px solid var(--accent2);
}

.summary-title {
  color: var(--accent2);
  margin-top: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.summary-content {
  margin-top: 1rem;
}

@media (max-width: 768px) {
  .main-content {
    padding: 1rem;
  }
  
  .article {
    padding: 2rem 1.5rem;
  }
  
  .image-grid {
    grid-template-columns: 1fr;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  h3 {
    font-size: 1.2rem;
  }
}

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

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

.decorative-line {
  height: 2px;
  background: linear-gradient(to right, transparent, var(--accent), transparent);
  margin: 3rem 0;
  opacity: 0.3;
}