:root {
  --primary: #2f8fb3;
  --primary-dark: #1e6b87;
  --accent: #f4a637;
  --text: #333333;
  --bg-light: #f6fafc;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Verdana, Helvetica, sans-serif;
  color: var(--text);
  background: var(--bg-light);
  line-height: 1.55;
}
a { color: var(--primary-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }

.site-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
}
.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  flex-wrap: wrap;
  gap: 10px;
}
.brand { display: flex; align-items: center; gap: 12px; color: #fff; }
.brand:hover { text-decoration: none; }
.logo { height: 48px; width: auto; background: #fff; border-radius: 6px; padding: 3px; }
.brand-text { font-size: 1.15rem; font-weight: 600; }
.main-nav ul { list-style: none; display: flex; flex-wrap: wrap; gap: 4px; margin: 0; padding: 0; }
.main-nav a {
  color: #fff; padding: 8px 14px; border-radius: 4px; font-weight: 600; font-size: 0.92rem;
  text-transform: uppercase; letter-spacing: .02em;
}
.main-nav a:hover { background: rgba(255,255,255,0.18); text-decoration: none; }
.sub-nav { background: rgba(0,0,0,0.15); }
.sub-nav ul {
  max-width: 1100px; margin: 0 auto; list-style: none; display: flex; flex-wrap: wrap;
  gap: 2px; padding: 6px 20px;
}
.sub-nav a { color: #eaf6fb; padding: 5px 10px; font-size: 0.83rem; border-radius: 3px; }
.sub-nav a:hover { background: rgba(255,255,255,0.15); text-decoration: none; }

.content-wrap { max-width: 1100px; margin: 0 auto; padding: 30px 20px 60px; min-height: 60vh; }

h1 { color: var(--primary-dark); font-size: 1.8rem; margin-top: 0; }
h1.page-title { border-bottom: 3px solid var(--accent); padding-bottom: 10px; }
h2 { color: var(--primary-dark); }

.card-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 20px; margin: 20px 0;
}
.card {
  background: #fff; border-radius: 8px; box-shadow: 0 1px 4px rgba(0,0,0,0.1);
  padding: 16px; transition: box-shadow .15s;
}
.card:hover { box-shadow: 0 4px 14px rgba(0,0,0,0.15); }
.card h3 { margin-top: 0; font-size: 1.05rem; }
.card .meta { color: #777; font-size: 0.82rem; }

.list-links { list-style: none; padding: 0; }
.list-links li { border-bottom: 1px solid #e0eaf0; padding: 10px 0; }
.list-links .badge {
  display: inline-block; font-size: 0.72rem; text-transform: uppercase; font-weight: 700;
  color: #fff; background: var(--primary); border-radius: 3px; padding: 2px 7px; margin-right: 8px;
}

.gallery-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; }
.gallery-grid figure { margin: 0; background: #fff; border-radius: 6px; overflow: hidden; box-shadow: 0 1px 3px rgba(0,0,0,.1); }
.gallery-grid img { display: block; width: 100%; height: 160px; object-fit: cover; }
.gallery-grid figcaption { font-size: 0.75rem; padding: 6px 8px; color: #666; }

.article-body { background: #fff; padding: 24px; border-radius: 8px; box-shadow: 0 1px 4px rgba(0,0,0,.08); }
.article-meta { color: #888; font-size: 0.85rem; margin-bottom: 18px; }

.download-item {
  display: flex; justify-content: space-between; align-items: center; background: #fff;
  padding: 12px 16px; border-radius: 6px; margin-bottom: 8px; box-shadow: 0 1px 3px rgba(0,0,0,.07);
}
.download-item .filesize { color: #888; font-size: 0.8rem; white-space: nowrap; margin-left: 12px; }

.home-hero {
  background: #fff; border-radius: 10px; padding: 30px; margin-bottom: 30px;
  box-shadow: 0 1px 6px rgba(0,0,0,.08);
}
.section-nav-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px,1fr)); gap: 14px; margin: 24px 0; }
.section-nav-grid a {
  display: block; background: var(--primary); color: #fff; text-align: center; padding: 18px 10px;
  border-radius: 8px; font-weight: 600; text-transform: uppercase; font-size: 0.85rem;
}
.section-nav-grid a:hover { background: var(--primary-dark); text-decoration: none; }

.site-footer { background: #1c3a45; color: #cfe3ea; margin-top: 40px; }
.footer-inner {
  max-width: 1100px; margin: 0 auto; padding: 30px 20px; display: flex; gap: 50px; flex-wrap: wrap;
}
.footer-col h4 { color: #fff; margin-top: 0; }
.footer-col ul { list-style: none; padding: 0; columns: 2; }
.footer-col a { color: #cfe3ea; }

.embed-frame { width: 100%; min-height: 500px; border: 0; background: #fff; border-radius: 8px; }
.pdf-frame { width: 100%; height: 80vh; border: 0; }