/* style.css */
:root {
  --bg-color: #ffffff;
  --text-color: #333333;
  --heading-color: #111111;
  --meta-color: #666666;
  --border-color: #eaeaea;
  --link-color: #0056b3;
  --link-hover: #003d82;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --heading-color: #ffffff;
    --meta-color: #aaaaaa;
    --border-color: #333333;
    --link-color: #66b3ff;
    --link-hover: #99ccff;
  }
}

* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  margin: 0;
  padding: 0 20px;
}

a {
  color: var(--link-color);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--link-hover);
  text-decoration: underline;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 0;
}

.masthead {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
}

.masthead h1 {
  font-size: 1.5rem;
  margin: 0;
  color: var(--heading-color);
}

.masthead h1 a {
  color: inherit;
}

.masthead nav a {
  margin-left: 20px;
  font-weight: 500;
}

.masthead nav a.active {
  border-bottom: 2px solid var(--heading-color);
  color: var(--heading-color);
  padding-bottom: 4px;
}

h2 {
  font-size: 1.2rem;
  color: var(--heading-color);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 8px;
  margin-top: 40px;
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.item {
  margin-bottom: 24px;
}

.item-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 4px;
  flex-wrap: wrap;
}

.item-title {
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--heading-color);
}

.item-meta {
  color: var(--meta-color);
  font-size: 0.95rem;
}

.item-desc {
  margin: 4px 0 0 0;
}

ul {
  padding-left: 20px;
  margin-top: 8px;
  margin-bottom: 0;
}

li {
  margin-bottom: 6px;
}

.downloads {
  text-align: right;
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.downloads a {
  margin-left: 10px;
}

/* Print optimizations */
@media print {
  body {
    color: #000;
    background: #fff;
  }
  .masthead nav, .downloads {
    display: none;
  }
  .container {
    padding: 0;
  }
  @page { margin: 1cm; }
}