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

body {
  font-family: monospace;
  line-height: 1.6;
  color: #333;
}

/* Header and Navigation */
header {
  background: #fff;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
}

a {
  color: #03719c; 
  text-decoration: none;
}

a:hover {
  color: #03719c;
  text-decoration: underline;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  padding: 5px;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: #333;
  margin: 3px 0;
  transition: 0.3s;
  border-radius: 2px;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(-45deg) translate(-5px, 6px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(45deg) translate(-5px, -6px);
}

/* Navigation Menu */
.nav-menu {
  display: flex;
  list-style: none;
  gap: 30px;
}

.nav-menu a {
  color: #333;
  text-decoration: none;
  font-weight: 500;
  padding: 10px 0;
  transition: color 0.3s;
}

.nav-menu a:hover {
  color: #03719c;
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background-color: #fff;
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
    padding: 20px 0;
    gap: 0;
    z-index: 1000;
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-menu li {
    margin: 10px 0;
  }

  .nav-menu a {
    padding: 15px;
    display: block;
    font-size: 1.1rem;
  }
}

/* Main Content */
main {
  max-width: 800px;
  margin: 100px auto 0;
  padding: 0 20px;
  min-height: calc(100vh - 200px);
}

/* Typography */
h1,
h2,
h3 {
  color: #2c3e50;
  margin-bottom: 20px;
}

h1 {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

h2 {
  font-size: 2rem;
  margin-top: 0.75rem;
}

h3 {
  font-size: 1.5rem;
  margin-top: 0.75rem;
}

p {
  margin-bottom: 20px;
  font-size: 1.0rem;
}

ul, ol {
  margin-bottom: 20px;
  padding-left: 30px;
}

li {
  margin-bottom: 10px;
  font-size: 1.0rem;
  line-height: 1.6;
}

/* Blockquote styling */
blockquote {
  border-left: 4px solid #03719c;
  padding-left: 20px;
  margin: 20px 0;
  font-style: italic;
  color: #555;
}

/* Code block styling */
pre, code {
  font-family: 'Courier New', Courier, monospace;
  background-color: #f3eeee;
  border-radius: 4px;
}

pre {
  padding: 15px;
  overflow-x: auto;
  line-height: 1.5;
}

/* Responsive images */
main img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 20px 0;
}

/* Footer */
footer {
  background: #f8f9fa;
  text-align: center;
  padding: 40px 20px;
  margin-top: 60px;
  color: #666;
  border-top: 1px solid #eee;
  min-height: 100px;
}

/* Responsive */
@media (max-width: 600px) {
  main {
    padding: 0 15px;
  }

  h1 {
    font-size: 2rem;
  }

  .nav-container {
    padding: 0 15px;
  }
}