/* ===========================
   Font: Open Sans (Fontspring Bulletproof Syntax)
   =========================== */
@font-face {
  font-family: 'Open Sans';
  src: url('fonts/OpenSans-Regular.woff2') format('woff2'), /* modern browsers */
       url('fonts/OpenSans-Regular.ttf') format('truetype'); /* fallback */
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Open Sans';
  src: url('fonts/OpenSans-SemiBold.woff2') format('woff2'),
       url('fonts/OpenSans-SemiBold.ttf') format('truetype');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

/* ===========================
   Global Styles
   =========================== */
body {
  font-family: 'Open Sans', Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #fdfdfd;
  color: #333;
  line-height: 1.6;
}

/* ===========================
   Header & Navigation
   =========================== */
header {
  background: #3366cc;
  color: white;
  padding: 1.5em 1em;
  text-align: center;
}

header h1 {
  margin: 0;
  font-weight: 600;
  font-size: 2rem;
}

nav {
  margin-top: 0.5em;
}

nav a {
  color: white;
  text-decoration: none;
  margin: 0 12px;
  font-weight: 600;
  transition: opacity 0.2s ease-in-out;
}

nav a:hover {
  opacity: 0.8;
}

/* ===========================
   Hero Section
   =========================== */
.hero {
  text-align: center;
  padding: 3em 1em;
  background: #eaf2ff;
}

.hero h2 {
  font-size: 2.2rem;
  font-weight: 600;
  margin-bottom: 0.5em;
}

.hero p {
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.1rem;
  color: #444;
}

/* ===========================