/* ----------------- Reset & Base ----------------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  line-height: 1.6;
  background-color: #fefefe;
  color: #333;
  font-size: 16px;
  padding: 1rem;
}

/* ----------------- Header ----------------- */
header {
  text-align: center;
  padding: 2rem 1rem 1rem 1rem;
  background-color: #004080;
  color: white;
  border-radius: 8px;
}

header h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

header nav {
  margin-top: 0.5rem;
}

header nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
}

header nav ul li a {
  text-decoration: none;
  color: #ffdd00;
  font-weight: bold;
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  transition: 0.2s;
}

header nav ul li a:hover {
  background-color: #003366;
  color: #fff;
}

/* ----------------- Main Content ----------------- */
main {
  max-width: 1000px;
  margin: 2rem auto;
  padding: 1rem;
  background-color: #fdfdfd;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

section {
  margin-bottom: 2rem;
}

section h2 {
  font-size: 1.5rem;
  color: #004080;
  margin-bottom: 0.5rem;
}

section p {
  margin-bottom: 1rem;
  line-height: 1.7;
}

section ul, section ol {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

section ul li, section ol li {
  margin-bottom: 0.6rem;
}

section .intro p {
  font-size: 1.1rem;
  font-weight: 500;
}

/* ----------------- Links & Buttons ----------------- */
a {
  color: #004080;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.btn {
  display: inline-block;
  background-color: #004080;
  color: #fff;
  padding: 0.5rem 1rem;
  text-decoration: none;
  border-radius: 4px;
  transition: 0.2s;
}

.btn:hover {
  background-color: #00264d;
}

/* ----------------- Checklist Styling ----------------- */
ul.checklist li::before {
  content: "✅ ";
  margin-right: 0.5rem;
  color: green;
  font-weight: bold;
}

/* ----------------- Footer ----------------- */
footer {
  text-align: center;
  margin-top: 3rem;
  font-size: 0.9rem;
  color: #666;
  padding: 1rem 0;
  border-top: 1px solid #ccc;
}

footer a {
  color: #004080;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* ----------------- Responsive ----------------- */
@media (max-width: 768px) {
  header nav ul {
    flex-direction: column;
    gap: 0.5rem;
  }

  main {
    padding: 1rem;
    margin: 1rem;
  }

  section h2 {
    font-size: 1.3rem;
  }

  header h1 {
    font-size: 1.6rem;
  }
}