/*
green: 00a500
*/

* {
  box-sizing: border-box;
}

html {
  font-size: 62.5%;
}

body {
  font-family: 'Aller', -apple-system, 'Open Sans', 'Helvetica Neue', sans-serif;
  font-size: 1.8rem;
  line-height: 1.6;
  margin: 0 auto; 
  max-width: 96rem;
  padding: 6rem 2rem;
  position: relative;
}

a:link, a:visited {
  color: #00a500;
  font-weight: bold;
}

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

p:last-child {
  margin-bottom: 0;
}

h2 {
  margin-bottom: 2rem;
}

h2 span {
  border-bottom: 4px solid #00a500;
  box-shadow: 0 2px 0 #000;
}

h3 span {
  border-bottom: 2px solid #00a500;
  box-shadow: 0 1px 0 #000;
}

h3 {
  text-transform: uppercase;
  font-size: 2rem;
  margin: 0 0 1.5rem;
}

h4 {
  color: #00a500;
  margin: 0;
}

h4 a:link,
h4 a:visited {
  text-decoration: none;
}

h4 a:hover,
h4 a:focus {
  color: #000;
}

p {
  max-width: 75ch;
}

img {
  display: block;
  max-width: 100%;
}

iframe {
  border: 0;
}

@font-face {
  font-family: 'Aller';
  src: url('fonts/aller_bd-webfont.woff2') format('woff2'),
       url('fonts/aller_bd-webfont.woff') format('woff');
  font-weight: bold;
  font-style: normal;
}

@font-face {
  font-family: 'Aller';
  src: url('fonts/aller_rg-webfont.woff2') format('woff2'),
       url('fonts/aller_rg-webfont.woff') format('woff');
  font-weight: normal;
  font-style: normal;
}

/* Components */

.nav {
  position: absolute;
  right: 2rem;
  top: 2rem;
  font-size: 1.3rem;
  line-height: 1;
}

.nav__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav a:link,
.nav a:visited {
  text-decoration: none;
}

.video {
  height: 0;
	padding-bottom: 56.25%; /* 16:9 */
	position: relative;
}

.video iframe {
	height: 100%;
	left: 0;
	position: absolute;
	top: 0;
	width: 100%;
}

.section {
  margin-bottom: 4rem;
}

.section:last-child:target {
  padding-bottom: 14rem;
}

.section-video {
  margin-bottom: 3rem;
}

.grid {
  margin: 0;
  padding: 0;
  list-style: none;
}

.grid__item {
  flex: 0 0 50%;
  margin-bottom: 5rem;
}

.grid__item:nth-last-child(-n+2) {
  margin-bottom: 0;
}

.referenzen {
  margin-bottom: 2rem;
}

.referenz {
  margin: 4rem 0;
}

.header {
  display: inline-block;
  margin-bottom: 3rem;
  position: relative;
}

.header__text {
  position: absolute;
  top: 100%;
  left: 0;
  line-height: 1.2;
  display: flex;
  justify-content: space-between;
  width: 100%;
}

.header__slogan {
  font-size: 0.8rem;
  padding-top: 0.1rem;
}

.header__name {
  flex-shrink: 0;
  font-size: 1.2rem;
}

.cc-window {
  border-top: 2px solid rgb(0, 0, 0);
}

.button {
  background: #00a500;
  display: inline-block;
  padding: 1rem 2rem;
  transition: all 0.2s;
}

.button:link,
.button:visited {
  color: #000000;
  text-decoration: none;
}

.button:hover {
  background-color: #000000;
  color: #fff;
}

@media (min-width: 400px) {
  .header__slogan {
    font-size: 1rem;
  }
  
  .header__name {
    font-size: 1.4rem;
  }
}

@media (min-width: 520px) {
  .header__slogan {
    font-size: 1.2rem;
  }

  .header__name {
    font-size: 1.6rem;
  }

  .grid {
    display: flex;
    flex-wrap: wrap;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(40rem, 1fr));
    grid-gap: 2rem;
  }
}

@media (min-width: 768px) {
  body {
    padding-left: 4rem;
    padding-right: 4rem;
  }

  .nav {
    right: 4rem;
    top: 2rem;
    font-size: 1.6rem;
  }

  .grid__item {
    flex: 0 0 33.333%;
  } 

  .section-video {
    margin-bottom: 4rem;
  }

  .section {
    margin-bottom: 6rem;
  }

  .referenzen {
    margin-bottom: 4rem;
  }

  .referenz {
    margin-bottom: 2rem;
  }

  .header {
    margin-bottom: 4rem;
  }

  .header__slogan {
    font-size: 1.4rem;
  }

  .header__name {
    font-size: 1.8rem;
  }
}

.referenz:last-child {
  margin-bottom: 0;
}

.section:last-child {
  margin-bottom: 0;
}

/* Helpers */
.visually-hidden {
  white-space: nowrap;
  width: 1px;
  height: 1px;
  overflow: hidden;
  border: 0;
  padding: 0;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  margin: -1px;
  position: absolute;
  left: 0;
  top: 0;
}