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

/* --- Body --- */
body {
  font-family: system-ui, sans-serif;
  background: #e0f2ff; /* light blue background */
  color: #1f2937; /* dark text for contrast */
  line-height: 1.6;
  padding: 0;
}

/* --- Container for main content --- */
main {
  max-width: 900px;
  margin: 60px auto 40px auto;
  padding: 20px;
  background: #ffffff; /* white card for sections */
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

/* --- Header --- */
header {
  text-align: center;
  padding: 40px 20px 0 20px;
}

header h1 {
  font-size: 3rem;
  color: #2563eb; /* bold blue accent */
  margin-bottom: 15px;
  letter-spacing: 1px;
}

nav a {
  margin: 0 15px;
  text-decoration: none;
  color: #1e40af; /* darker blue for nav */
  font-weight: 600;
  transition: color 0.3s;
}

nav a:hover {
  color: #3b82f6; /* bright hover blue */
}

/* --- Sections --- */
section {
  margin-bottom: 40px;
  padding: 10px 0;
}

h2 {
  font-size: 2rem;
  color: #1d4ed8; /* medium blue */
  margin-bottom: 12px;
}

p, ul {
  font-size: 1.1rem;
  color: #1f2937;
}

ul {
  list-style-type: disc;
  padding-left: 20px;
}

em {
  color: #4b5563;
  font-size: 0.95rem;
}

/* --- Footer --- */
footer {
  text-align: center;
  padding: 30px 10px;
  background: #e0f2ff; /* footer light blue */
  color: #ffffff;
  border-top-left-radius: 12px;
  border-top-right-radius: 12px;
  margin-top: 40px;
  font-weight: 500;
}