*, *::before, *::after { box-sizing: border-box; }
html { font-size: 62.5%; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: "Lato", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 1.7rem;
  line-height: 1.75;
  color: #566471;
  background-color: #f5f7f6;
}
a { color: #298f5e; text-decoration: none; transition: color .3s ease, border-color .3s ease; }
a:hover { color: #185437; }

.container { width: 90%; max-width: 1100px; margin: 0 auto; }

/* Header / navbar */
.site-header {
  background-color: #fff;
  border-bottom: 1px solid rgba(0,0,0,.075);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding: 18px 0;
  gap: 12px;
}
.brand {
  font-size: 2.6rem;
  font-weight: 300;
  letter-spacing: -1px;
  color: #566471;
  line-height: 1.1;
}
.brand span { color: #298f5e; font-weight: 700; }
.main-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.main-nav a {
  display: block;
  padding: 9px 20px;
  font-size: 1.4rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #566471;
  border: 1px solid transparent;
  border-radius: 100em;
}
.main-nav a:hover,
.main-nav a.active { border-color: rgba(0,0,0,.075); color: #298f5e; }

/* Hero title */
.hero {
  background: linear-gradient(135deg, #566471 0%, #3c4752 55%, #298f5e 140%);
  color: #fff;
  text-align: center;
  padding: 80px 0 70px;
}
.hero h1 {
  margin: 0;
  font-size: 5rem;
  font-weight: 300;
  letter-spacing: -1px;
  line-height: 1.15;
  text-transform: none;
}
.hero h1::after {
  content: "";
  display: block;
  width: 70px;
  height: 3px;
  margin: 26px auto 0;
  background-color: #7fc79f;
  border-radius: 2px;
}

/* Main content */
main { padding: 55px 0 30px; }
article {
  background-color: #fff;
  border: 1px solid rgba(0,0,0,.075);
  padding: 50px 6%;
  border-radius: 3px;
  box-shadow: 0 2px 14px rgba(0,0,0,.04);
  overflow-wrap: break-word;
}
article h2, article h3, article h4, article h5, article h6 {
  color: #566471;
  line-height: 1.25;
  margin: 1.6em 0 .5em;
}
article h2 { font-size: 3.2rem; font-weight: 300; letter-spacing: -.5px; }
article h3 { font-size: 2.5rem; font-weight: 300; }
article h4 { font-size: 2rem; }
article h5 { font-size: 1.7rem; }
article h6 { font-size: 1.4rem; text-transform: uppercase; letter-spacing: 1px; }
article > *:first-child { margin-top: 0; }
article p { margin: 0 0 1.4em; }
article ul, article ol { margin: 0 0 1.4em 2rem; padding-left: 1rem; }
article li { margin-bottom: .4em; }
article blockquote {
  margin: 1.8em 0;
  padding: 20px 28px;
  border-left: 4px solid #298f5e;
  background-color: #f5f7f6;
  font-size: 2rem;
  font-weight: 300;
  line-height: 1.5;
}
article img { max-width: 100%; height: auto; }
article table { width: 100%; border-collapse: collapse; margin-bottom: 1.4em; display: block; overflow-x: auto; }
article th, article td { padding: 8px 12px; border: 1px solid rgba(0,0,0,.075); text-align: left; }

/* Transition paragraphs */
.transition {
  margin-top: 40px;
  padding: 34px 6%;
  background-color: #fff;
  border: 1px solid rgba(0,0,0,.075);
  border-top: 3px solid #298f5e;
  border-radius: 3px;
  overflow-wrap: break-word;
}
.transition p { margin: 0 0 1.2em; }
.transition p:last-child { margin-bottom: 0; }

/* Links block */
.links-section {
  margin: 40px 0 60px;
  padding: 40px 6% 30px;
  background-color: #566471;
  color: #fff;
  border-radius: 3px;
}
.links-section h3 {
  margin: 0 0 14px;
  padding-bottom: 10px;
  font-size: 2rem;
  font-weight: 400;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #fff;
  border-bottom: 1px solid rgba(255,255,255,.25);
}
.links-section ul {
  list-style: none;
  margin: 0 0 34px;
  padding: 0;
  column-count: 2;
  column-gap: 40px;
}
.links-section ul:last-child { margin-bottom: 0; }
.links-section li {
  break-inside: avoid;
  padding: 7px 0;
  border-bottom: 1px solid rgba(255,255,255,.12);
  overflow-wrap: break-word;
  word-break: break-word;
  line-height: 1.5;
}
.links-section a { color: #bfe8d1; }
.links-section a:hover { color: #fff; text-decoration: underline; }

/* Footer */
.site-footer {
  background-color: #fff;
  border-top: 1px solid rgba(0,0,0,.075);
  padding: 34px 0;
  text-align: center;
}
.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 26px;
}
.site-footer a {
  font-size: 1.2rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: #566471;
}
.site-footer a:hover { color: #298f5e; }

/* Responsive */
@media (max-width: 979px) {
  .hero { padding: 60px 0 52px; }
  .hero h1 { font-size: 4rem; }
}
@media (max-width: 767px) {
  body { font-size: 1.6rem; }
  .site-header .container { justify-content: center; text-align: center; }
  .main-nav ul { justify-content: center; }
  .hero h1 { font-size: 3.2rem; }
  article { padding: 32px 22px; }
  article h2 { font-size: 2.6rem; }
  article h3 { font-size: 2.1rem; }
  .transition { padding: 26px 22px; }
  .links-section { padding: 30px 22px 22px; }
  .links-section ul { column-count: 1; }
}
@media (max-width: 480px) {
  .brand { font-size: 2.2rem; }
  .main-nav a { padding: 8px 14px; }
  .hero { padding: 46px 0 40px; }
  .hero h1 { font-size: 2.7rem; }
}