* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: black;
  color: white;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: black;
  box-shadow: 0 2px 4px rgba(255,255,255,0.1);
}

.nav-brand {
  font-size: 1.5rem;
  font-weight: bold;
}

.nav-items {
  display: flex;
  gap: 2rem;
  align-items: center;
  justify-content: center;
  flex: 1;
  margin-right: 150px;
  flex-wrap: wrap;
}

.hamburger {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
}

@media (max-width: 768px) {
  .hamburger {
    display: block;
    position: absolute;
    right: 1rem;
    top: 1rem;
    z-index: 100;
  }

  .nav-items {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    width: 100%;
    flex-direction: column;
    background: black;
    padding: 1rem;
    gap: 1.5rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    animation: slideDown 0.3s ease-out;
  }

  @keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
  }
  
  .nav-items.active {
    display: flex;
  }

  .navbar {
    position: relative;
    padding: 1rem;
  }

  .nav-brand {
    flex: 1;
  }
  
  .nav-brand {
    margin-bottom: 1rem;
  }
  
  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }
  
  .content {
    padding: 1rem;
  }
  
  .pdf-container {
    margin-top: 1rem;
  }
}

.nav-link {
  text-decoration: none;
  color: white;
}

.btn-primary {
  background-color: #5bc0de;
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  cursor: pointer;
}

.content {
  flex: 1;
  padding: 2rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.pdf-container {
  margin-top: 2rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  height: 100vh;
  overflow: hidden;
  -webkit-overflow-scrolling: touch;
}

.pdf-frame {
  border: none;
}

.pdf-download {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.5rem 1rem;
  background: #5bc0de;
  color: white;
  text-decoration: none;
  border-radius: 4px;
}

@media (max-width: 768px) {
  .pdf-container {
    height: calc(100vh - 120px);
    margin-top: 1rem;
  }
}

.footer {
  background-color: black;
  padding: 2rem;
  margin-top: auto;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

.footer-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.footer-link {
  text-decoration: none;
  color: white;
}

.copyright {
  color: #ffffff;
  text-align: center;
  margin-top: 1rem;
}