:root {
  --primary: #0F4C81;
  --secondary: #FF9F1C;
  --accent: #6DD5FA;
  --bg-light: #F8F9FA;
  --text-dark: #212529;
  --text-light: #F8F9FA;
}

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

body {
  background: var(--bg-light);
  color: var(--text-dark);
  line-height: 1.6;
  overflow-x: hidden;
}

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

.header-banner {
  position: relative;
  height: 500px;
  background: linear-gradient(135deg, var(--primary), #1E88E5);
  clip-path: polygon(0 0, 100% 0, 100% 85%, 0% 100%);
  margin-bottom: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: white;
}

.header-content {
  max-width: 800px;
  padding: 0 20px;
  z-index: 2;
}

.header-banner h1 {
  font-size: 3rem;
  margin-bottom: 20px;
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.header-banner p {
  font-size: 1.2rem;
  margin-bottom: 30px;
}

.decorative-image {
  position: absolute;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  transition: all 0.3s ease;
}

.decorative-image:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 35px rgba(0,0,0,0.3);
}

.img-1 {
  width: 250px;
  top: 50px;
  left: 5%;
}

.img-2 {
  width: 280px;
  bottom: -50px;
  right: 10%;
}

.img-3 {
  width: 200px;
  top: 150px;
  right: 15%;
}

.nav-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(15, 76, 129, 0.9);
  backdrop-filter: blur(10px);
  padding: 15px 0;
}

.nav-menu {
  display: flex;
  justify-content: flex-end;
  list-style: none;
  padding: 0 50px;
}

.nav-item {
  margin-left: 30px;
}

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

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

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

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

article {
  background: white;
  border-radius: 15px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
  padding: 50px;
  margin-bottom: 80px;
  position: relative;
  overflow: hidden;
}

article::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 100%;
  background: linear-gradient(to bottom, var(--primary), var(--accent));
}

article h2 {
  color: var(--primary);
  margin-bottom: 30px;
  font-size: 2rem;
  position: relative;
  padding-bottom: 15px;
}

article h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 80px;
  height: 3px;
  background: var(--secondary);
}

article h3 {
  color: var(--primary);
  margin: 25px 0 15px;
  font-size: 1.5rem;
}

article p {
  margin-bottom: 20px;
  font-size: 1.1rem;
}

article strong {
  color: var(--primary);
}

pre {
  background: #f5f5f5;
  border-radius: 8px;
  padding: 20px;
  margin: 20px 0;
  overflow: auto;
  border-left: 4px solid var(--secondary);
}

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

.button-demo {
  display: inline-block;
  background: linear-gradient(45deg, var(--primary), var(--secondary));
  color: white;
  padding: 12px 25px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: bold;
  margin: 20px 0;
  box-shadow: 0 4px 15px rgba(15, 76, 129, 0.3);
  transition: all 0.3s;
}

.button-demo:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(15, 76, 129, 0.4);
  background: linear-gradient(45deg, var(--secondary), var(--primary));
}

.footer {
  background: var(--primary);
  color: white;
  padding: 50px 0;
  text-align: center;
  clip-path: polygon(0 15%, 100% 0, 100% 100%, 0% 100%);
}

.footer p {
  margin-bottom: 20px;
}

.footer-links {
  display: flex;
  justify-content: center;
  list-style: none;
  margin-top: 30px;
}

.footer-link {
  color: white;
  text-decoration: none;
  margin: 0 15px;
  transition: color 0.3s;
}

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

.notice {
  background: var(--secondary);
  color: white;
  padding: 15px;
  text-align: center;
  font-weight: bold;
  margin-bottom: 30px;
  border-radius: 8px;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(255, 159, 28, 0.7); }
  70% { box-shadow: 0 0 0 10px rgba(255, 159, 28, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 159, 28, 0); }
}

@media (max-width: 768px) {
  .header-banner {
    height: auto;
    padding: 100px 0;
    clip-path: none;
  }
  
  .header-banner h1 {
    font-size: 2rem;
  }
  
  .nav-menu {
    justify-content: center;
    padding: 0 20px;
  }
  
  .nav-item {
    margin-left: 15px;
  }
  
  article {
    padding: 30px 20px;
  }
  
  .img-1, .img-2, .img-3 {
    display: none;
  }
}

@media (max-width: 480px) {
  .header-banner h1 {
    font-size: 1.8rem;
  }
  
  .nav-menu {
    flex-wrap: wrap;
  }
  
  .nav-item {
    margin: 5px 10px;
  }
  
  article h2 {
    font-size: 1.5rem;
  }
  
  article h3 {
    font-size: 1.3rem;
  }
}