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

body {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 15px;
  color: #333;
  background: #f5f5f5;
}

/* Header / Logo */
header {
  background: #fff;
  padding: 28px 20px 20px;
  text-align: center;
  border-bottom: 1px solid #ddd;
}

header img {
  max-height: 100px;
  max-width: 320px;
}

/* Navigation */
nav {
  background: #1a3a5c;
}

nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 0;
}

nav ul li a {
  display: block;
  padding: 14px 32px;
  color: #fff;
  text-decoration: none;
  font-size: 14px;
  font-weight: bold;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  transition: background 0.2s;
}

nav ul li a:hover,
nav ul li a.active {
  background: #2e6da4;
}

/* Main layout */
main {
  max-width: 960px;
  margin: 36px auto;
  padding: 0 20px;
  display: flex;
  gap: 36px;
  align-items: flex-start;
}

/* Content area */
.content {
  flex: 1;
  background: #fff;
  padding: 30px 32px;
  border: 1px solid #ddd;
  line-height: 1.75;
}

.content h2 {
  font-size: 18px;
  color: #1a3a5c;
  margin-bottom: 18px;
  padding-bottom: 8px;
  border-bottom: 2px solid #2e6da4;
}

.content p {
  margin-bottom: 14px;
}

.content ul {
  margin: 10px 0 14px 20px;
}

.content ul li {
  margin-bottom: 7px;
}

/* Sidebar */
.sidebar {
  width: 160px;
  flex-shrink: 0;
  text-align: center;
}

.sidebar img {
  width: 100%;
  max-width: 160px;
  border: 1px solid #ddd;
}

/* Tab sections */
.tab-section {
  display: none;
}

.tab-section.active {
  display: block;
}

/* Contact styling */
.contact-block {
  line-height: 2;
}

.contact-block strong {
  display: block;
  font-size: 16px;
  margin-bottom: 8px;
  color: #1a3a5c;
}

/* Downloads placeholder */
.downloads-placeholder {
  color: #888;
  font-style: italic;
}

footer {
  text-align: center;
  padding: 18px;
  font-size: 12px;
  color: #999;
  border-top: 1px solid #ddd;
  background: #fff;
  margin-top: 40px;
}

footer a {
  color: #999;
  text-decoration: none;
}

footer a:hover {
  color: #2e6da4;
  text-decoration: underline;
}