header,
main {
  background-color: var(--shade-color-09);
}

header {
  position: sticky;
  top: 0;
  z-index: 100;
}

/* ----------- HEADER -------------- */

.primary-header {
  display: flex;
  justify-content: space-between;
  padding: var(--space-06) var(--space-07);
}

.header-container {
  display: flex;
  align-items: center;
  gap: var(--space-08);
}

.header-text {
  font-size: var(--font-size-08);
  font-weight: var(--font-weight-06);
}

.header-img {
  max-width: var(--space-12);
  border-radius: var(--primary-border-radius);
}

.navigation {
  display: flex;
  align-items: center;
  gap: var(--space-07);
}

.navigation-item:link,
.navigation-item:visited {
  font-size: var(--font-size-06);
  font-weight: var(--font-weight-06);
  text-decoration: none;
  color: var(--grey-color-02);
}

.navigation-item:hover,
.navigation-item:active {
  color: var(--grey-color-03);
}

.lang-switcher:link,
.lang-switcher:visited {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3.6rem;
  height: 3.6rem;
  border-radius: 50%;
  border: var(--border-width-02) solid var(--primary-color);
  text-decoration: none;
  font-size: var(--font-size-03);
  font-weight: var(--font-weight-07);
  color: var(--grey-color-02);
  transition: all 300ms;
}

.lang-switcher:hover,
.lang-switcher:active {
  background-color: var(--primary-color);
  color: #fff;
}

/* ----------- HERO -------------- */

.hero-container {
  display: grid;
  grid-template-columns: 1fr 2fr;
  align-items: center;
  gap: var(--space-07);

  padding: var(--space-08);
}

.hero-text {
  font-size: var(--font-size-05);
  font-weight: var(--font-weight-05);
  line-height: var(--line-height-02);

  margin-top: var(--space-06);
  margin-bottom: var(--space-06);
}

.hero-img {
  width: 100%;
}

/* GALLERY */
.gallery-container {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-04);
}

.gallery-img {
  width: 100%;
}

.gallery-img--1 {
  grid-column: 1 / 3;
  grid-row: 1 / 3;
}

.gallery-img--3 {
  grid-column: 2 / -1;
  grid-row: 3 / 5;
}

.gallery-img--5 {
  grid-column: 1 / 3;
  grid-row: 5 / 7;
}

.gallery-img--6 {
  grid-column: 2 / -1;
  grid-row: 7 / 9;
}

/* FEATURES (Z-PATTERN) */

.features-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-10);
}

.feature-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: var(--space-10);
}

.feature-img {
  width: 100%;
  border-radius: var(--primary-border-radius);
}

.feature-text-box {
  display: flex;
  flex-direction: column;
  gap: var(--space-06);
}

.feature-text {
  font-size: var(--font-size-05);
  font-weight: var(--font-weight-05);
  line-height: var(--line-height-01);
}

/* FOOTER */

.footer-container {
  padding: var(--space-10);
  background-color: var(--shade-color-09);
}

.impressum {
  margin-bottom: var(--space-10);
}

.impressum-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.footer-logo-img {
  max-width: var(--space-12);
  border-radius: var(--primary-border-radius);
}

.impressum-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-08);
}

.impressum-heading {
  font-size: var(--font-size-06);
  font-weight: var(--font-weight-07);
  margin-bottom: var(--space-04);
}

.impressum-text {
  font-size: var(--font-size-05);
  font-weight: var(--font-weight-05);
  line-height: var(--line-height-01);
}

.impressum-link:link,
.impressum-link:visited {
  color: var(--tint-color-04);
  text-decoration: underline;
}

.impressum-link:hover,
.impressum-link:active {
  color: var(--tint-color-02);
}

.copyright-text {
  font-size: var(--font-size-04);
  font-weight: var(--font-weight-05);
  text-align: center;
  padding-top: var(--space-08);
  border-top: var(--border-width-01) solid var(--grey-color-01);
}

/* ----------- HAMBURGER MENU -------------- */

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  gap: 0.5rem;
  width: 4rem;
  height: 4rem;
  padding: 0.6rem;
  z-index: 1000;
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 0.3rem;
  background-color: var(--grey-color-02);
  border-radius: 2px;
  transition: all 300ms;
}

.nav-toggle.active .nav-toggle-bar:nth-child(1) {
  transform: translateY(0.8rem) rotate(45deg);
}

.nav-toggle.active .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active .nav-toggle-bar:nth-child(3) {
  transform: translateY(-0.8rem) rotate(-45deg);
}

/* ----------- RESPONSIVE: LARGE DESKTOP (max 75em / 1200px) -------------- */

@media (max-width: 75em) {
  .hero-container {
    grid-template-columns: 2fr 3fr;
  }

  .feature-item {
    gap: var(--space-08);
  }
}

/* ----------- RESPONSIVE: SMALL DESKTOP / TABLET LANDSCAPE (max 62em / 992px) -------------- */

@media (max-width: 62em) {
  .primary-header {
    flex-direction: column;
    align-items: center;
    gap: var(--space-06);
  }

  .hero-container {
    grid-template-columns: 1fr;
    padding: var(--space-07);
  }

  .hero-text-container {
    order: 2;
  }

  .hero-img {
    order: 1;
    border-radius: var(--primary-border-radius);
  }

  .gallery-container {
    grid-template-columns: 1fr 1fr;
  }

  .gallery-img--1,
  .gallery-img--3,
  .gallery-img--5,
  .gallery-img--6 {
    grid-column: 1 / -1;
    grid-row: auto;
  }

  .feature-item {
    gap: var(--space-07);
  }

  .impressum-grid {
    gap: var(--space-06);
  }
}

/* ----------- RESPONSIVE: TABLET PORTRAIT (max 48em / 768px) -------------- */

@media (max-width: 48em) {
  .nav-toggle {
    display: flex;
  }

  .primary-header {
    flex-direction: row;
    position: relative;
  }

  .navigation {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background-color: var(--shade-color-09);
    padding: var(--space-06) var(--space-07);
    gap: var(--space-05);
    box-shadow: 0 0.4rem 1.2rem rgba(0, 0, 0, 0.1);
    z-index: 999;
  }

  .navigation.nav-open {
    display: flex;
  }

  .navigation-item:link,
  .navigation-item:visited {
    display: block;
    padding: var(--space-04) 0;
    font-size: var(--font-size-07);
    border-bottom: var(--border-width-01) solid var(--shade-color-07);
  }

  .navigation .btn:link,
  .navigation .btn:visited {
    text-align: center;
    margin-top: var(--space-04);
  }

  .navigation .lang-switcher:link,
  .navigation .lang-switcher:visited {
    align-self: center;
    margin-top: var(--space-04);
  }

  .header-text {
    font-size: var(--font-size-07);
  }

  .header-img {
    max-width: var(--space-11);
  }

  .header-container {
    gap: var(--space-06);
  }

  .primary-heading {
    font-size: var(--font-size-08);
  }

  .secondary-heading {
    font-size: var(--font-size-07);
  }

  .feature-item {
    grid-template-columns: 1fr;
    gap: var(--space-06);
  }

  .feature-img {
    order: 1;
  }

  .feature-text-box {
    order: 2;
  }

  .accordion-item {
    column-gap: var(--space-07);
    padding: var(--space-06);
  }

  .icon {
    width: var(--font-size-08);
    height: var(--font-size-08);
  }

  .accordion-arrow-icon {
    width: var(--font-size-08);
    height: var(--font-size-08);
  }

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

  .footer-container {
    padding: var(--space-08);
  }

  .footer-logo-img {
    max-width: var(--space-11);
  }
}

/* ----------- RESPONSIVE: SMARTPHONE (max 30em / 480px) -------------- */

@media (max-width: 30em) {
  html {
    font-size: 56.25%;
  }

  .container,
  .container-small {
    padding: 0 var(--space-05);
  }

  .primary-header {
    padding: var(--space-05);
  }

  .header-text {
    font-size: var(--font-size-06);
  }

  .header-img {
    max-width: var(--space-10);
  }

  .header-container {
    gap: var(--space-05);
  }

  .hero-container {
    padding: var(--space-05);
  }

  .hero-text {
    font-size: var(--font-size-04);
  }

  .gallery-container {
    grid-template-columns: 1fr;
  }

  .gallery-img--1,
  .gallery-img--3,
  .gallery-img--5,
  .gallery-img--6 {
    grid-column: 1;
    grid-row: auto;
  }

  .margin-bottom-big {
    margin-bottom: var(--space-09);
  }

  .margin-bottom-small {
    margin-bottom: var(--space-07);
  }

  .btn:link,
  .btn:visited {
    font-size: var(--font-size-06);
    padding: var(--space-04) var(--space-06);
  }

  .accordion-item {
    grid-template-columns: 1fr auto;
    column-gap: var(--space-05);
    padding: var(--space-05);
  }

  .accordion-item .icon {
    display: none;
  }

  .accordion-content {
    grid-column: 1 / -1;
  }

  .tertiary-heading {
    font-size: var(--font-size-06);
  }

  .accordion-content-list {
    font-size: var(--font-size-05);
  }

  .footer-container {
    padding: var(--space-06);
  }

  .footer-logo-img {
    max-width: var(--space-10);
  }

  .impressum-heading {
    font-size: var(--font-size-05);
  }

  .impressum-text {
    font-size: var(--font-size-04);
  }

  .copyright-text {
    font-size: var(--font-size-03);
  }
}