:root {
  --primary: #1B263B;
  --secondary: #654EA3;
  --accent: #FFA500;
  --light: #FFFFFF;
  --gray: #F5F5F5;
  --gradient-green: linear-gradient(45deg, #4CAF50, #8BC34A);
  --shadow: 0 4px 20px rgba(0,0,0,0.1);
}

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

body {
  background-color: var(--gray);
  color: var(--primary);
  line-height: 1.6;
  overflow-x: hidden;
}

.header {
  background: var(--primary);
  color: var(--light);
  padding: 2rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(27,38,59,0.9) 0%, rgba(101,78,163,0.7) 100%);
  z-index: -1;
}

.header h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.notice {
  background: var(--accent);
  color: white;
  padding: 0.5rem;
  text-align: center;
  font-size: 0.9rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
  margin-bottom: 3rem;
}

.hero-content h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--secondary);
  position: relative;
}

.hero-content h2::after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  background: var(--gradient-green);
  margin-top: 10px;
}

.hero-images {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.hero-images img {
  width: 100%;
  border-radius: 15px;
  box-shadow: var(--shadow);
  transition: transform 0.3s;
}

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

article {
  background: var(--light);
  padding: 2rem;
  border-radius: 15px;
  box-shadow: var(--shadow);
  margin-bottom: 3rem;
}

article h2 {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  color: var(--secondary);
  position: relative;
}

article h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--gradient-green);
  margin-top: 10px;
}

article h3 {
  font-size: 1.5rem;
  margin: 2rem 0 1rem;
  color: var(--primary);
}

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

pre {
  background: #f8f8f8;
  padding: 1.5rem;
  border-radius: 10px;
  overflow-x: auto;
  margin: 1.5rem 0;
  border-left: 4px solid var(--secondary);
}

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

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

.card {
  background: var(--light);
  border-radius: 15px;
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: transform 0.3s;
}

.card:hover {
  transform: translateY(-10px);
}

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 10px;
  margin-bottom: 1rem;
}

.footer {
  background: var(--primary);
  color: var(--light);
  padding: 2rem 0;
  text-align: center;
  margin-top: 3rem;
}

.nav {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.nav a {
  color: var(--light);
  text-decoration: none;
  transition: color 0.3s;
}

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

@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
  }
  
  .hero-images {
    grid-template-columns: 1fr;
  }
  
  article {
    padding: 1.5rem;
  }
}

@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-15px); }
  100% { transform: translateY(0px); }
}

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

.button-gradient {
  background: var(--gradient-green);
  border: none;
  color: white;
  padding: 12px 25px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  border-radius: 25px;
  transition: all 0.3s;
  box-shadow: 0 4px 15px rgba(76, 175, 80, 0.3);
  margin: 1rem 0;
}

.button-gradient:hover {
  background: linear-gradient(45deg, #8BC34A, #4CAF50);
  box-shadow: 0 6px 20px rgba(76, 175, 80, 0.4);
  transform: translateY(-2px);
}