* {
  box-sizing: border-box;
}

:root {
  --accent: #0095eb;
  --accent-dark: #007cc3;
  --body: #626262;
  --heading: #3e3e3e;
  --muted: #7b7b7b;
  --line: #e9e9e9;
  --blue-box: #cad6e6;
  --shell: #fcfcfc;
  --footer: #3f454c;
}

html {
  min-height: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100%;
  color: var(--body);
  background: #c4c4c4 url("../../bilder/banner-abstract.png") center / cover fixed no-repeat;
  font: 400 14px/1.75 Roboto, Arial, Tahoma, sans-serif;
  letter-spacing: 0;
}

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

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover,
a:focus {
  color: var(--accent-dark);
}

h1,
h2,
h3,
h4 {
  color: var(--heading);
  margin: 0 0 18px;
  font-weight: 300;
  letter-spacing: 0;
}

h1 {
  font-size: 48px;
  line-height: 1.05;
  text-align: center;
}

h2 {
  font-size: 30px;
  line-height: 1.15;
}

h3 {
  font-size: 25px;
  line-height: 1.18;
}

h4 {
  font-size: 21px;
  font-weight: 500;
}

p {
  margin: 0 0 16px;
}

ul {
  margin: 0 0 22px 20px;
  padding: 0;
}

li {
  margin: 0 0 6px;
}

.page-shell {
  width: min(1240px, 100%);
  margin: 0 auto;
  background: var(--shell);
  box-shadow: 0 0 28px rgba(0, 0, 0, 0.16);
}

.site-header {
  background: #fff;
  position: relative;
  z-index: 2;
}

.logo-area {
  display: flex;
  justify-content: center;
  padding: 18px 24px 9px;
}

.logo-area img {
  width: min(390px, 82vw);
}

.nav-row {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  border-top: 1px solid #f2f2f2;
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 0;
  background: transparent;
  color: #444;
  cursor: pointer;
}

.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after {
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
  content: "";
}

.menu-toggle span::before {
  transform: translateY(-7px);
}

.menu-toggle span::after {
  transform: translateY(5px);
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  margin: 0;
  list-style: none;
}

.site-nav li {
  margin: 0;
}

.site-nav a {
  display: block;
  padding: 16px 22px 15px;
  color: #565656;
  font-size: 15px;
  line-height: 1.4;
  text-transform: uppercase;
}

.site-nav a:hover,
.site-nav a:focus,
.site-nav a.active {
  color: var(--accent);
}

.hero-band {
  padding: 50px 0 0;
  background: #505050 url("../../bilder/banner-abstract.png") left top / cover no-repeat;
}

.hero-band img {
  width: min(940px, calc(100% - 56px));
  margin: 0 auto;
}

.content-area {
  padding: 50px 30px;
}

.home-content {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
  gap: 44px;
  padding-top: 76px;
}

.language-link {
  display: flex;
  justify-content: center;
  margin-bottom: 14px;
}

.language-link img {
  width: 30px;
  height: 20px;
  object-fit: cover;
  border: 1px solid rgba(0, 0, 0, 0.08);
}

.lead {
  max-width: 760px;
  margin: 0 auto 34px;
  text-align: center;
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.cert-box {
  min-height: 275px;
  padding: 24px 20px;
  background: var(--blue-box);
  border-radius: 4px;
  text-align: center;
}

.cert-box img {
  width: 150px;
  height: 150px;
  margin: 0 auto 16px;
  object-fit: contain;
}

.cert-box.wide {
  grid-column: 1 / 3;
  min-height: 220px;
}

.side-section h3 {
  margin-top: 0;
  text-transform: uppercase;
}

.bullet-list {
  list-style: square;
}

.arrow-list {
  list-style: disc;
}

.page-intro {
  padding: 50px 30px 12px;
}

.narrow {
  max-width: 980px;
  margin: 0 auto;
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(250px, 1fr);
  gap: 44px;
  align-items: start;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 30px;
  align-items: start;
}

.profile {
  text-align: center;
}

.profile img {
  width: 150px;
  height: 150px;
  margin: 0 auto 16px;
  object-fit: cover;
  border-radius: 2px;
}

.profile.primary {
  grid-column: span 2;
}

.membership-list {
  max-width: 780px;
  margin: 0 auto;
}

.contact-form {
  display: grid;
  gap: 14px;
}

.contact-form label {
  display: grid;
  gap: 6px;
  color: #4d4d4d;
  font-weight: 500;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid #ebebeb;
  border-radius: 3px;
  background: #fff;
  color: var(--body);
  font: inherit;
  padding: 11px 12px;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 0;
  color: #1982c2;
  background: #e9f5fc;
  border-color: #d5e5ee;
}

.checkbox-line {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-weight: 400;
}

.checkbox-line input {
  width: 16px;
  height: 16px;
  margin-top: 5px;
}

.button {
  width: fit-content;
  min-width: 140px;
  border: 0;
  border-radius: 3px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font: 500 14px/1 Roboto, Arial, Tahoma, sans-serif;
  padding: 13px 22px;
}

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

.form-note {
  min-height: 24px;
  color: var(--accent-dark);
}

.contact-card {
  padding: 2px 0 0;
}

.legal-copy {
  max-width: 960px;
  margin: 0 auto;
}

.legal-copy h4 {
  margin-top: 28px;
}

.site-footer {
  color: #f2f2f2;
  background: var(--footer) url("../../bilder/banner-abstract.png") left top / cover no-repeat;
}

.footer-widgets {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 30px;
  padding: 70px 30px;
}

.site-footer h4 {
  color: #fff;
}

.site-footer a {
  color: #fff;
}

.footer-copy {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 30px;
  color: #d7d7d7;
  background: rgba(0, 0, 0, 0.28);
}

.back-top {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

@media (max-width: 900px) {
  .home-content,
  .two-column {
    grid-template-columns: 1fr;
  }

  .team-grid {
    grid-template-columns: 1fr 1fr;
  }

  .profile.primary {
    grid-column: span 2;
  }

  .footer-widgets {
    grid-template-columns: 1fr;
    padding: 46px 24px;
  }
}

@media (max-width: 700px) {
  h1 {
    font-size: 36px;
  }

  h2 {
    font-size: 24px;
  }

  h3 {
    font-size: 21px;
  }

  .logo-area {
    padding: 14px 18px 8px;
  }

  .nav-row {
    justify-content: flex-end;
    padding: 0 12px 8px;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    width: 100%;
  }

  .site-nav.is-open {
    display: block;
  }

  .nav-row {
    flex-wrap: wrap;
  }

  .site-nav ul {
    display: block;
    width: 100%;
    padding: 6px 0 0;
  }

  .site-nav a {
    padding: 12px 8px;
    text-align: center;
    border-top: 1px solid #f0f0f0;
  }

  .hero-band {
    padding-top: 26px;
  }

  .hero-band img {
    width: calc(100% - 28px);
  }

  .content-area,
  .page-intro {
    padding-left: 20px;
    padding-right: 20px;
  }

  .home-content {
    padding-top: 42px;
  }

  .cert-grid,
  .team-grid {
    grid-template-columns: 1fr;
  }

  .cert-box.wide,
  .profile.primary {
    grid-column: auto;
  }

  .footer-copy {
    align-items: flex-start;
    flex-direction: column;
  }
}