* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  color: #1c2730;
  background: #f7f7f4;
  line-height: 1.6;
}

a {
  color: #315c6b;
  text-decoration: none;
}

a:hover {
  color: #1e3f4a;
}

header {
  background: #17252d;
  color: white;
  padding: 22px 7%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

header a {
  color: white;
}

header > a:first-child {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: .02em;
}

nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

nav a {
  color: #dce5e7;
  font-weight: 500;
}

nav a:hover {
  color: white;
}

main {
  max-width: 1150px;
  margin: 0 auto;
  padding: 70px 7%;
}

section {
  margin-bottom: 70px;
}

h1 {
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  line-height: .98;
  letter-spacing: -.045em;
  margin: 20px 0 28px;
  max-width: 850px;
  color: #17252d;
}

h2 {
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  line-height: 1.15;
  color: #17252d;
  margin-bottom: 18px;
}

h3 {
  font-size: 1.5rem;
  color: #17252d;
}

p {
  max-width: 800px;
  font-size: 1.08rem;
}

main > p:first-of-type,
section > p:first-of-type {
  color: #52616a;
}

.hero,
main > section:first-child {
  padding: 55px 0;
}

.card,
article {
  background: white;
  padding: 32px;
  margin: 24px 0;
  border-radius: 10px;
  border: 1px solid #e1e4e3;
}

footer {
  background: #17252d;
  color: #cbd5d8;
  padding: 35px 7%;
  margin-top: 60px;
}

footer a {
  color: white;
}

button,
.button {
  display: inline-block;
  background: #315c6b;
  color: white;
  padding: 12px 20px;
  border-radius: 6px;
  border: 0;
  font-weight: 600;
}

button:hover,
.button:hover {
  background: #244a57;
  color: white;
}

@media (max-width: 700px) {
  header {
    align-items: flex-start;
    flex-direction: column;
  }

  nav {
    gap: 15px;
  }

  main {
    padding-top: 45px;
  }

  h1 {
    font-size: 3rem;
  }
}

.brand img {
  height: 100px;
  width: auto;
  display: block;
}