:root {
  --charcoal: #15303B;
  --royal-blue: #2785FF;
  --orange: #FF6F00;
  --white: #ffffff;
}

body {
  margin: 0;
  background-color: var(--charcoal);
  color: var(--white);
  font-family: 'Segoe UI', sans-serif;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: var(--charcoal);
  border-bottom: 2px solid var(--orange);
}

.logo img {
  max-height: 60px;
}

.main-nav a {
  color: var(--white);
  margin-left: 1rem;
  text-decoration: none;
  font-weight: bold;
}
.main-nav a:hover {
  color: var(--orange);
}

.hero {
  text-align: center;
  padding: 4rem 2rem;
}
.hero h1, h2 {
  font-size: 2.5rem;
  color: var(--royal-blue);
}
.hero p {
  font-size: 1.2rem;
  margin: 1rem 0;
}
.hero-btn {
  background-color: var(--orange);
  color: var(--white);
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  font-weight: bold;
  text-decoration: none;
  display: inline-block;
  margin-top: 1rem;
}
.hero-btn:hover {
  background-color: #e65c00;
}

.site-footer {
  text-align: center;
  padding: 2rem;
  font-size: 0.9rem;
  color: var(--white);
  border-top: 1px solid var(--royal-blue);
}

.card {
  background-color: #1f3a45;
  border-left: 4px solid var(--royal-blue);
  padding: 1rem 1.5rem;
  margin-bottom: 1.5rem;
  border-radius: 8px;
  transition: transform 0.3s ease;
}
.card:hover {
  transform: translateY(-5px);
}

.blog-layout {
  display: flex;
  gap: 2rem;
  padding: 2rem;
  align-items: flex-start;
}

.blog-main {
  flex: 3;
}

.blog-sidebar {
  flex: 1;
  position: sticky;
  top: 2rem;
  background-color: #1f3a45;
  padding: 1rem;
  border-radius: 8px;
  max-height: calc(100vh - 4rem);
  overflow-y: auto;
}

.blog-sidebar h3 {
  margin-top: 0;
  color: var(--royal-blue);
}

.blog-sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.blog-sidebar li {
  margin-bottom: 1.25rem;
}

.sidebar-link {
  color: #fff;
  font-weight: bold;
  text-decoration: none;
  display: block;
}

.sidebar-link:hover {
  text-decoration: underline;
}

.sidebar-date {
  font-size: 0.85rem;
  color: #ccc;
  margin-top: 0.25rem;
}

.sidebar-btn {
  display: block;
  background-color: var(--royal-blue);
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: bold;
  transition: background-color 0.3s ease;
}

.sidebar-btn:hover {
  background-color: #2a4f8d;
}

.sidebar-date {
  font-size: 0.8rem;
  color: #ccc;
  margin-top: 0.25rem;
  margin-bottom: 1rem;
}