/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: #ffffff;
  color: #333;
  line-height: 1.6;
}

/* Container for centering content */
.container {
  width: 90%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px;
}

/* Header */
header {
  background: #fff;
  padding: 20px 0;
  border-bottom: 4px solid #ffcc00;
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header h1 {
  font-size: 2.5rem;
  color: #333;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
}

nav ul li a {
  text-decoration: none;
  color: #333;
  font-weight: 700;
  border-bottom: 2px solid transparent;
  transition: border-color 0.3s;
}

nav ul li a:hover {
  border-color: #ffcc00;
}

/* Hero Section */
.hero {
  background: #f9f9f9;
  padding: 60px 0;
  text-align: center;
  border: 4px solid #ffcc00;
  box-shadow: 8px 8px 0 #333;
  margin-bottom: 40px;
}

.hero h2 {
  font-size: 2.5rem;
  margin-bottom: 20px;
  color: #333;
}

.hero p {
  font-size: 1.2rem;
  max-width: 800px;
  margin: 0 auto;
}

/* Main Content Sections */
main section {
  margin-bottom: 40px;
  padding: 30px;
  border: 3px solid black;
  box-shadow: 4px 4px 0 #333;
  background: #fff;
}

main section h2 {
  font-size: 2rem;
  margin-bottom: 15px;
  color: #333;
  border-bottom: 3px solid #ffcc00;
  padding-bottom: 10px;
}

main section p,
main section li {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

/* Lists */
ul {
  list-style: disc inside;
  margin-left: 20px;
}

ol {
  list-style: decimal inside;
  margin-left: 20px;
}

/* Download Button */
.btn {
  display: inline-block;
  padding: 15px 30px;
  background: #ffcc00;
  color: #333;
  font-weight: 700;
  text-decoration: none;
  border: 3px solid #333;
  box-shadow: 4px 4px 0 #333;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 2px 2px 0 #333;
}

/* Footer */
footer {
  background: #fff;
  padding: 20px 0;
  border-top: 4px solid black;
  text-align: center;
}

footer p {
  font-size: 1rem;
  color: #333;
}

footer a {
  color: #333;
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color 0.3s;
}

footer a:hover {
  border-color: #ffcc00;
}

/* Responsive Styles */
@media (max-width: 768px) {
  header .container {
    flex-direction: column;
    align-items: flex-start;
  }

  header h1 {
    font-size: 2rem;
  }

  nav ul {
    flex-direction: column;
    gap: 10px;
  }

  .hero {
    padding: 40px 0;
  }

  .hero h2 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  main section {
    padding: 20px;
  }

  main section h2 {
    font-size: 1.5rem;
  }

  main section p,
  main section li {
    font-size: 1rem;
  }

  .btn {
    padding: 10px 20px;
  }
}

@media (max-width: 480px) {
  header h1 {
    font-size: 1.5rem;
  }

  .hero h2 {
    font-size: 1.5rem;
  }

  .hero p {
    font-size: 0.9rem;
  }

  main section h2 {
    font-size: 1.2rem;
  }

  main section p,
  main section li {
    font-size: 0.9rem;
  }

  .btn {
    padding: 8px 15px;
  }
}