index.css

:root {
  --c-base: #fff;
  --c-primary: #454545;
  --c-secondary: #da3b31;
  --c-tertiary: #293462;
  --c-action: #da3b31;
  --c-accent: #fff1c1;
  --c-action-dark: #9a2922;

  --fz-tiny: 0.75em;
  /* 12px */
  --fz-xsmall: 1em;
  /* 16px */
  --fz-small: 1em;
  /* 21.28px */
  --fz-medium: 1.333em;
  /* 28.32px */
  --fz-large: 1.777em;
  /* 37.904px */
  --fz-xlarge: 2.369em;
  /* 50.512px */
  ;
  --fz-huge: 3.157em;
  /* 67.344px */

  --gutter: 1rem;

}

@media (min-width: 700px) {
  :root {
    --fz-xsmall: 1em;
    /* 16px */
    --fz-small: 1.333em;
    /* 21.28px */
    --fz-medium: 1.777em;
    /* 28.32px */
    --fz-large: 2.369em;
    /* 37.904px */
    --fz-xlarge: 3.157em;
    /* 50.512px */
    ;
    --fz-huge: 4.209em;
    /* 67.344px */

    --gutter: 1.75rem;
  }
}

*,
*:before,
*:after {
  box-sizing: border-box;
}

body {
  background: var(--c-accent);
  color: var(--c-primary);
  font-family: "Montserrat", sans-serif;
  -webkit-font-smoothing: antialiased;
  font-size: 1em;
  line-height: 1.7;
  margin: 0;
  padding: 0;
}

h1,
h2,
h3 {
  color: var(--c-tertiary);
  font-family: "Playfair Display", serif;
  font-weight: 600;
  line-height: 1.1;
  margin: 0 0 1em;
  padding: 0;
}

h1,
h2 {
  margin: 0 0 1em;
  line-height: 1.2;
}

h1 {
  font-size: var(--fz-xlarge);
}

h2 {
  font-size: var(--fz-large);
  max-width: 800px;
}

h3 {
  font-size: var(--fz-medium);
  margin-bottom: .75em;
  margin-top: 1.5em;
}


p,
ul,
ol {
  font-size: var(--fz-xsmall);
  margin: 0 0 1em;
  max-width: 700px;
}

a {
  color: var(--c-action);
}

a:hover,
a:focus {
  text-decoration: none;
}

.banner {
  background: var(--c-secondary);
}

.branding {
  background: var(--c-base);
  padding: var(--gutter);
}

.branding__logo,
.branding__tagline,
.branding__meta {
  margin: 0;
  padding: 0;
}

.branding__logo {
  font-size: 2em;
  margin-bottom: .25em;
}

.branding__logo>a {
  display: block;
  font-weight: 600;
  text-decoration: none;
}

.branding__tagline {
  margin-bottom: .5em;
}


.nav {
  font-weight: 500;
  line-height: 1;
  padding: var(--gutter);
  width: 100%;
}

.nav__list {
  font-size: var(--fz-small);
  list-style: none;
  margin: 0;
  max-width: none;
  overflow: hidden;
  padding: 0;
  text-align: left;
}

.nav__item {
  display: inline-block;
  line-height: 1.5;
}

.nav__anchor {
  color: var(--c-base);
  display: block;
  margin: 0 var(--gutter) 0 0;
  text-decoration: none;
}

.nav__anchor:hover,
.nav__anchor:focus {
  text-decoration: underline;
}

.container {
  background: var(--c-base);
  margin: var(--gutter) 0;
  max-width: 1050px;
  padding: var(--gutter);
}

.indent {
  display: block;
  margin: 0 0 2em 0;
  width: 100%;
}

.clean {
  margin: 0;
  padding: 0;
}

.cta {
  padding: 2em 0 1em;
}

.button {
  background: var(--c-action);
  border-radius: 3px;
  color: var(--c-base);
  display: inline-block;
  font-weight: 600;
  padding: .85em 1.5em;
  text-decoration: none;
  transition: background linear .15s;
}

.button:hover,
.button:focus {
  background: var(--c-action-dark);
}

@media (min-width: 600px) {

  .branding {
    flex-basis: 100%;
    max-width: 575px;
  }

  .banner {
    display: flex;
    align-items: flex-end;
  }

  .cta {
    padding: 2em 0 0;
  }

  .nav__list {
    text-align: right;
  }

  .nav__item {
    display: block;
  }

  .nav__anchor {
    margin: 0 0 0 var(--gutter);
  }

}

@media (min-width: 700px) {
  .indent {
    float: left;
    margin: 0 2em 1em 0;
    width: 25%;
  }
}

@media (min-width: 820px) {
  .branding__tagline {
    margin-bottom: .75em;
  }

  .nav__item {
    display: inline-block;
  }
}

@media (min-width: 1000px) {
  .container {
    padding: 2em var(--gutter) 3em;
    margin: var(--gutter) 0;
  }
}