:root {
  --clr-primary: #4f5d75;
  --clr-secondary: #2d3142;
  --clr-accent: #ef8354;
  --clr-button: #ffffff;
}

*,
*::after,
*::before {
  margin: 0;
  padding: 0;
  text-align: center;
  font-size: 18px;
  color: #ffffff;
}

body {
  background-color: var(--clr-primary);
  line-height: 1.6;
}

h1 {
  padding: 0.2em 0.1em 0.8em 0.1em;
  font-size: 1.5em;
  color: var(--clr-accent);
}

a {
  color: var(--clr-accent);
}

a:hover {
  color: var(--clr-button);
}

p {
  padding: 0 1.3em;
}

img {
  max-width: 100%;
  display: block;
  height: auto;
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.3);
}

.grid {
  display: grid;
  height: 100%;
  grid-template-columns: 1fr;
  grid-template-rows: 0.2fr 2.1fr 0.1fr;
  grid-template-areas:
    "header"
    "main"
    "footer";
}

.header,
footer {
  background-color: var(--clr-secondary);
}

.header {
  grid-area: header;
  font-size: 2em;
  padding: 1em;
}

.footer {
  grid-area: footer;
}

.main {
  background-color: var(--clr-primary);
  grid-area: main;
  margin: 0;
}

.even,
.odd {
  padding: 1em 0;
  width: 100%;
}

.even {
  background-color: var(--clr-primary);
}

.odd {
  background-color: var(--clr-secondary);
}

.images {
  margin: 1em;
  display: grid;
  grid-template-columns: 0.2fr 1fr 1fr 0.2fr;
  grid-template-rows: 1fr;
  grid-template-areas: ".  left-col right-col  . ";
}

.left-col,
.right-col {
  margin: 0.3em;
}

.left-col {
  grid-area: left-col;
}

.right-col {
  grid-area: right-col;
}

.btn-download {
  background-color: var(--clr-accent);
  color: var(--clr-button);
  padding: 0.8em 1.3em;
  margin: 1em;
  display: inline-block;
  text-decoration: none;
  font-weight: bold;
  text-transform: uppercase;
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.3);
}

.btn-download:hover {
  outline: var(--clr-button) 3px solid;
}

@media (max-width: 40em) {
  .images {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr 1fr;
    grid-template-areas: "left-col" "right-col";
  }
}