@import url('https://fonts.googleapis.com/css?family=Work+Sans:300,600');

:root {
  --background: #333;
}

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

/* navigation styles start here */

.navh {
  background: var(--background);
  text-align: center;
  position: fixed;
  z-index: 999;
  width: 100%;
}

.nav-toggle {
  display: none;
}

.nav-toggle-label {
  position: absolute;
  top: 0;
  left: 0;
  margin-left: 1em;
  height: 100%;
  display: flex;
  align-items: center;
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
  display: block;
  background: white;
  height: 2px;
  width: 2em;
  border-radius: 2px;
  position: relative;
}

.nav-toggle-label span::before,
.nav-toggle-label span::after {
  content: '';
  position: absolute;
}

.nav-toggle-label span::before {
  bottom: 7px;
}

.nav-toggle-label span::after {
  top: 7px;
}

nav {
  position: absolute;
  text-align: left;
  top: 100%;
  left: 0;
  background: var(--background);
  width: 100%;
  transform: scale(1, 0);
  transform-origin: top;
  transition: transform 400ms ease-in-out;
}

nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

nav li {
  margin-bottom: 1em;
  margin-left: 1em;
}

nav a {
  color: #fff;
  text-decoration: none;
  font-size: 1.2rem;
  opacity: 0;
  transition: opacity 150ms ease-in-out;
}

nav a:hover {
  color: #000;
}

.nav-toggle:checked ~ nav {
  transform: scale(1,1);
}

.nav-toggle:checked ~ nav a {
  opacity: 1;
  transition: opacity 250ms ease-in-out 250ms;
}

@media screen and (min-width: 800px) {
  .nav-toggle-label {
    display: none;
  }

  .navh {
    display: grid;
    grid-template-columns: 1fr auto minmax(600px, 3fr) 1fr;
  }

  .logo {
    grid-column: 1 / 3;
  }

  nav {
    all: unset;
    grid-column: 3 / 4;
    display: flex;
    justify-content: flex-end;
    align-items: center;
  }

  nav ul {
    display: flex;
  }

  nav li {
    margin-left: 2em;
    margin-bottom: 0;
  }

  nav a {
    opacity: 1;
    position: relative;
  }

  nav a::before {
    content: '';
    display: block;
    height: 5px;
    background: black;
    position: absolute;
    top: -.75em;
    left: 0;
    right: 0;
    transform: scale(0, 1);
    transition: transform ease-in-out 250ms;
  }

  nav a:hover::before {
    transform: scale(1,1);
  }
}

.box p {
  padding: 1em;
}


/* Core Styles */

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: #333;
  color: #fff;
  font-size: 1.1em;
  line-height: 1.5;
  text-align: center;
}

img {
  display: block;
  width: 100%;
  height: auto;
}

h1, h2, h3 {
  margin: 0;
  padding: 1em 0;
}

p {
  margin: 0;
  padding: 1em 0;
}

.btn {
  display: inline-block;
  background: #333;
  color: #fff;
  text-decoration: none;
  padding: 1em 2em;
  border: 1px solid #666;
  margin-top:2em;
}

.btn:hover {
  background: #fff;
  color: #333;
}

/* Header Showcase */

header {
  padding-top: 2em;
}

#intro {
  padding: 1em 1em;
}

#showcase {
  min-height: 450px;
  color: #fff;
  text-align: center;
}

#showcase .bg-image {
  position: absolute;
  background: #333 url('https://images.pexels.com/photos/247791/pexels-photo-247791.png?auto=compress&cs=tinysrgb&h=650&w=940');
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  width: 100%;
  height: 450px;
  z-index: -1;
  opacity: 0.4;
}

#showcase h1 {
  padding-top: 100px;
  padding-bottom: 0px;
}

#showcase  .content-wrap, #section-a  .content-wrap {
  padding; 0 1.5em;
}

/* Section A */

 #section-a {
   background: #eaeaea;
   color: #333;
   padding-bottom: 2em;
}

/* Section B */

#section-b {
  padding: 2em 1em 1em;
}

#section-b  ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

#section-b li {
  margin-bottom: 1em;
  background: #fff;
  color: #333;
}

.card-content {
  padding: 1.5em;
}

/* Section C */

#section-c {
  background: #fff;
  color: #333;
  padding: 2em;
}

#section-d .box {
  padding: 2em
  color: #fff;
}

#section-d .box:first-child {
  background: #2690d4;
}

#main-footer {
  padding: .9em;
  background: #000;
  color: #fff;
  text-align: center;
}

#main-footer a {
  text-decoration: none;
  color: #2690d4;
}

/* Media Queries */

@media(min-width: 700px) {
  .grid {
    display: grid;
    grid-template-columns: 1fr repeat(2, minmax(auto, 25em)) 1fr;
  }

  #section-a .content-text {
    columns: 1;
    column-gap: 2em;
  }

  #section-a .content-text p {
    padding-top: 0;
  }

  .content-wrap,
  #section-b ul {
    grid-column: 2/4;
  }

  .box, #main-footer div {
    grid-column: span 2;
  }

  #section-b ul {
    display: flex;
    justify-content: space-around;
  }

  #section-b li {
    width: 31%;
  }
}