* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background-color: #f2f4f6;
  color: #2b2b2b;
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1.7;
}

/* Reading column */
.container {
  max-width: 680px;
  margin: 60px auto;
  padding: 50px 48px 60px;
  background-color: #ffffff;
  border-radius: 4px;
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.07);
}

header {
  margin-bottom: 48px;
}

h1 {
  font-size: 2.1em;
  font-weight: normal;
  margin: 0 0 12px 0;
}

.subtitle {
  font-size: 1em;
  color: #6a6a6a;
}

/* Paragraphs */
main p {
  font-size: 1.05em;
  margin-bottom: 26px;
}

/* Images - controlled and calm */
.content-image {
  display: block;
  max-width: 90%;
  height: auto;
  margin: 36px auto 38px;
  border-radius: 3px;
}

/* Links */
a {
  color: #3f5f88;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Footer */
footer {
  margin-top: 60px;
  padding-top: 22px;
  border-top: 1px solid #e1e1e1;
  font-size: 0.9em;
  color: #777777;
}

/* Mobile */
@media (max-width: 720px) {
  .container {
    margin: 28px 16px;
    padding: 36px 26px 42px;
  }

  h1 {
    font-size: 1.9em;
  }

  .content-image {
    max-width: 100%;
  }
}