:root {
  --primary-color: #2563eb; /* Productivity Blue */
  --text-dark: #1f2937;
  --text-light: #6b7280;
  --bg-light: #f9fafb;
  --white: #ffffff;
}

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

body {
  font-family: "Inter", sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--white);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Navbar */
.navbar {
  padding: 20px 0;
  border-bottom: 1px solid #eee;
  background: var(--white);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--primary-color);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 25px;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-dark);
  font-weight: 500;
}

.nav-links a.active {
  color: var(--primary-color);
}

/* Blog Header */
.blog-header {
  padding: 80px 0 40px;
  background-color: var(--bg-light);
  text-align: center;
}

.category {
  color: var(--primary-color);
  text-transform: uppercase;
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 1px;
}

.blog-header h1 {
  font-size: 2.5rem;
  margin: 20px 0;
  line-height: 1.2;
}

.meta {
  color: var(--text-light);
}

/* Content Layout */
.blog-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 50px;
  padding: 60px 20px;
}

.post-body h2 {
  margin: 30px 0 15px;
}

.post-body p {
  margin-bottom: 20px;
  font-size: 1.1rem;
  color: #374151;
}

.lead {
  font-size: 1.3rem !important;
  font-weight: 500;
}

.feature-card {
  background: var(--bg-light);
  padding: 30px;
  border-left: 5px solid var(--primary-color);
  margin: 40px 0;
}

/* Sidebar */
.cta-box {
  background: var(--text-dark);
  color: var(--white);
  padding: 30px;
  border-radius: 12px;
  text-align: center;
  position: sticky;
  top: 100px;
}

.btn-primary {
  display: inline-block;
  background: var(--primary-color);
  color: var(--white);
  padding: 12px 25px;
  text-decoration: none;
  border-radius: 6px;
  margin-top: 20px;
  font-weight: 600;
}

/* Footer */
.footer {
  text-align: center;
  padding: 40px;
  border-top: 1px solid #eee;
  margin-top: 60px;
  color: var(--text-light);
}

/* Responsive */
@media (max-width: 768px) {
  .blog-content {
    grid-template-columns: 1fr;
  }
  .blog-header h1 {
    font-size: 2rem;
  }
}