/* Reset & base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "Georgia", "Times New Roman", serif;
  font-size: 17px;
  line-height: 1.65;
  color: #333;
  background: #fff;
  max-width: 860px;
  margin: 0 auto;
  padding: 0 20px 60px;
}

/* Header */
header {
  padding: 30px 0 10px;
  border-bottom: 2px solid #444;
  margin-bottom: 0;
}

header h1 {
  font-size: 1.8em;
  font-weight: bold;
}

header h1 a {
  color: #222;
  text-decoration: none;
}

header h1 a:hover { color: #0056b3; }

.subtitle {
  font-size: 0.95em;
  color: #555;
  font-style: italic;
  margin-top: 4px;
}

/* Nav */
nav {
  background: #f5f5f5;
  border-bottom: 1px solid #ddd;
  margin-bottom: 30px;
}

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0;
}

nav ul li a {
  display: block;
  padding: 10px 18px;
  color: #444;
  text-decoration: none;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.9em;
}

nav ul li a:hover,
nav ul li a.active {
  background: #444;
  color: #fff;
}

/* Main content */
main {
  padding: 0;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-weight: bold;
  line-height: 1.3;
  margin: 1.5em 0 0.5em;
  color: #222;
}

h1 { font-size: 1.9em; border-bottom: 1px solid #ddd; padding-bottom: 0.2em; }
h2 { font-size: 1.45em; border-bottom: 1px solid #eee; padding-bottom: 0.15em; }
h3 { font-size: 1.2em; }
h4 { font-size: 1.05em; }
h5 { font-size: 0.95em; }

p { margin: 0.8em 0; }

a { color: #0056b3; text-decoration: none; }
a:hover { text-decoration: underline; }

ul, ol { margin: 0.8em 0 0.8em 2em; }
li { margin: 0.3em 0; }

em { font-style: italic; }
strong { font-weight: bold; }

hr {
  border: none;
  border-top: 1px solid #ddd;
  margin: 1.5em 0;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1em 0;
}

/* Footer */
footer {
  margin-top: 50px;
  padding-top: 15px;
  border-top: 1px solid #ddd;
  font-size: 0.85em;
  color: #888;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

/* Responsive */
@media (max-width: 600px) {
  body { font-size: 15px; padding: 0 12px 40px; }
  nav ul { flex-direction: column; }
}