:root {
  --primary: #FFA726;
  --primary-light: #FFEB3B;
  --secondary: #1E88E5;
  --accent: #FF7043;
  --bg: #f9f9f9;
  --text: #333;
  --card-bg: #fff;
}

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

body {
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  padding-top: 80px;
}

.header {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  padding: 2rem;
  text-align: center;
  margin-bottom: 3rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  position: relative;
  overflow: hidden;
}

.header::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 10px;
  background: linear-gradient(90deg, var(--secondary), transparent);
}

.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: var(--secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  box-shadow: 0 2px 10px rgba(0,0,0,0.2);
  z-index: 1000;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  position: relative;
}

.nav-links a:hover {
  color: var(--primary-light);
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-light);
  transition: width 0.3s ease;
}

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

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

article {
  background: white;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.05);
  padding: 3rem;
  margin-bottom: 3rem;
}

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

h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  border-radius: 2px;
}

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

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

pre {
  background: #f5f5f5;
  border-radius: 8px;
  padding: 1.5rem;
  margin: 1.5rem 0;
  overflow-x: auto;
  border-left: 4px solid var(--secondary);
}

code {
  font-family: 'Courier New', monospace;
  color: #333;
}

color {
  color: var(--secondary);
  font-weight: bold;
}

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

.card {
  background: var(--card-bg);
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  padding: 2rem;
  transition: all 0.3s ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

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

.decor-img {
  width: 150px;
  height: 150px;
  border-radius: 12px;
  object-fit: cover;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  transition: all 0.3s ease;
}

.decor-img:hover {
  transform: scale(1.05);
  box-shadow: 0 8px 16px rgba(0,0,0,0.2);
}

.button {
  display: inline-block;
  background: var(--primary);
  color: white;
  padding: 0.8rem 1.5rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  margin: 1rem 0;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.button:hover {
  background: var(--primary-light);
  box-shadow: 0 8px 16px rgba(0,0,0,0.2);
  transform: translateY(-2px);
}

.notice {
  background: rgba(30, 136, 229, 0.1);
  border-left: 4px solid var(--secondary);
  padding: 1rem;
  margin: 2rem 0;
  border-radius: 0 4px 4px 0;
}

@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    padding: 1rem;
  }
  
  .nav-links {
    margin-top: 1rem;
    gap: 1rem;
  }
  
  article {
    padding: 2rem 1.5rem;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
}

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

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