* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.7;
  color: #1f2933;
  background: #f7f9fb;
}

header,
main,
footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.5rem;
}

header {
  background: #0f4c81;
  color: #fff;
}

nav a {
  color: #fff;
  margin-right: 1rem;
  text-decoration: none;
}

main {
  background: #fff;
  min-height: 40vh;
}

footer {
  font-size: 0.875rem;
  color: #52606d;
}

h1 {
  margin-top: 0;
}

.marker-box {
  padding: 1rem;
  border: 1px solid #cbd2d9;
  background: #eef2f6;
}