:root {
  --primary-dark: #020617;
  --primary-blue: #0f172a;
  --accent-green: #16a34a;
  --text-dark: #0f172a;
  --text-light: #ffffff;
  --bg-light: #f8fafc;
}

/* Base */
body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  line-height: 1.7;
  color: var(--text-dark);
  background: var(--bg-light);
}

/* Navigation */
.nav {
  background: var(--primary-dark);
  padding: 15px;
  text-align: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav a {
  color: var(--text-light);
  margin: 0 15px;
  text-decoration: none;
  font-weight: 600;
}

.nav a:hover {
  color: var(--accent-green);
}

/* Hero */
header {
  background: var(--primary-blue);
  color: var(--text-light);
  padding: 80px 20px;
  text-align: center;
}

header h1 {
  color: var(--text-light);
}

header p {
  font-size: 18px;
  max-width: 760px;
  margin: 0 auto 30px;
  opacity: 0.95;
}

/* Sections */
section {
  max-width: 900px;
  margin: auto;
  padding: 60px 30px;
  margin-bottom: 60px;
}

section:nth-of-type(even) {
  background: #ffffff;
  border-radius: 12px;
}

/* Highlight Section */
.highlight-section {
  background: #ffffff;
  border-left: 4px solid var(--accent-green);
  padding: 50px 40px;
  border-radius: 12px;
}

/* Typography */
h1, h2 {
  color: var(--text-dark);
}

p {
  font-size: 17px;
  max-width: 720px;
  margin: 0 auto 14px;
}

section p:last-child {
  margin-bottom: 0;
}

/* Lists */
ul {
  padding-left: 20px;
}

li {
  margin-bottom: 12px;
  line-height: 1.6;
}

/* Button */
.btn {
  display: inline-block;
  margin-top: 24px;
  padding: 14px 32px;
  background: var(--accent-green);
  color: var(--text-light);
  text-decoration: none;
  border-radius: 6px;
  font-weight: 600;
  box-shadow: 0 8px 20px rgba(22, 163, 74, 0.25);
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 26px rgba(22, 163, 74, 0.35);
}

/* Mobile */
@media (max-width: 768px) {

  header {
    padding: 60px 16px;
  }

  h1 {
    font-size: 30px;
    line-height: 1.2;
  }

  h2 {
    font-size: 23px;
    line-height: 1.3;
  }

  p {
    font-size: 16px;
    margin-bottom: 12px;
  }

  section {
    padding: 40px 18px;
    margin-bottom: 40px;
  }

  .highlight-section {
    padding: 35px 22px;
    border-left-width: 3px;
  }

  .btn {
    padding: 14px 26px;
  }

  .nav a {
    margin: 0 8px;
    font-size: 15px;
  }
}