* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: #1f2933;
  background: #ffffff;
  line-height: 1.6;
}

header {
  background: #123524;
  color: #ffffff;
  padding: 70px 24px;
  text-align: center;
}

header h1 {
  margin: 0 0 10px;
  font-size: 42px;
}

header p {
  margin: 0;
  font-size: 20px;
  color: #d9e8df;
}

main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 50px 24px;
}

section {
  margin-bottom: 50px;
}

h2 {
  color: #123524;
  font-size: 28px;
  margin-bottom: 15px;
}

h3 {
  color: #2f6b47;
  font-size: 21px;
}

p {
  font-size: 17px;
}

a {
  color: #2f6b47;
}

@media (max-width: 600px) {
  header {
    padding: 50px 20px;
  }

  header h1 {
    font-size: 32px;
  }

  header p {
    font-size: 18px;
  }

  main {
    padding: 35px 20px;
  }
}
header img {
  display: block;
  width: 160px;
  height: auto;
  margin: 0 auto 20px;
}
nav {
  background: #0b2f20;
  padding: 14px 24px;
  text-align: center;
}

nav a {
  color: #ffffff;
  text-decoration: none;
  font-size: 17px;
  font-weight: 600;
  margin: 0 20px;
}

nav a:hover {
  color: #8fd14f;
  text-decoration: underline;
}

@media (max-width: 600px) {
  nav a {
    display: inline-block;
    margin: 5px 10px;
    font-size: 16px;
  }
}