/* Header + Navigation gemäß UI-Regeln */
.header {
  width: 100%;
  height: 116px;
  background: var(--color-background-nav);
  display: grid;
  grid-template-columns: 1fr 2fr 1fr;
  align-items: center;
  position: relative;
  z-index: 1000;
}

.header-logo {
  height: 116px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  margin-left: 0;
}

.logo-image {
  height: 116px;
  width: auto;
  display: block;
}

.navigation {
  height: 116px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-background-nav);
}

.navigation-list {
  list-style: none;
  display: flex;
  gap: 15px;
  margin: 0;
  padding: 0;
}

.navigation-item {
  position: relative;
}

.navigation-link {
  color: var(--color-text-primary);
  text-transform: uppercase;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  height: 100%;
  padding: 0 6px;
  cursor: pointer;
}

.navigation-link:hover {
  color: var(--color-accent);
}

.navigation-item--active .navigation-link {
  color: var(--color-accent);
}

/* Dropdown Navigation */
.navigation-item--dropdown .navigation-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 250px;
  background: var(--color-background-nav);
  border: 1px solid var(--color-border);
  border-top: none;
  list-style: none;
  margin: 0;
  padding: 10px 0;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.navigation-item--dropdown:hover .navigation-dropdown {
  display: block;
}

.navigation-dropdown li {
  margin: 0;
}

.navigation-dropdown a {
  display: block;
  padding: 12px 20px;
  color: var(--color-text-primary);
  text-decoration: none;
  text-transform: none;
  font-size: 14px;
}

.navigation-dropdown a:hover {
  background: var(--color-background-hover);
  color: var(--color-accent);
}

/* Sidebar Navigation */
.layout-container {
  display: flex;
  width: 100%;
  min-height: calc(100vh - 116px);
}

.sidebar {
  width: 250px;
  min-width: 250px;
  background: var(--color-background-secondary);
  padding: 20px;
  border-right: 1px solid var(--color-border);
}

.layout-container:has(.sidebar:empty) .layout-main {
  width: 100%;
}

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

.sidebar-nav-item {
  margin-bottom: 8px;
}

.sidebar-nav-link {
  display: block;
  padding: 10px 15px;
  color: var(--color-text-primary);
  text-decoration: none;
  border-radius: 4px;
  transition: all 0.3s ease;
}

.sidebar-nav-link:hover {
  background: var(--color-background-hover);
  color: var(--color-accent);
}

.sidebar-nav-link--active {
  background: var(--color-accent);
  color: var(--color-background);
  font-weight: bold;
}

.sidebar-nav-heading {
  font-size: 18px;
  font-weight: bold;
  color: var(--color-text-primary);
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-accent);
}

.layout-main {
  flex: 1;
  padding: 20px;
}

/* Language Dropdown */
.navigation-item--language {
  margin-left: auto;
}

.navigation-link--language {
  padding: 0 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.language-flag {
  width: 24px;
  height: 18px;
  display: block;
  object-fit: contain;
  border: 1px solid #808080;
  transition: transform 0.3s ease;
}

.navigation-link--language:hover .language-flag {
  animation: pulse-flag 1.5s ease-in-out infinite;
}

@keyframes pulse-flag {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
}

.navigation-dropdown--language {
  right: 0;
  left: auto;
  min-width: 150px;
}

.navigation-dropdown--language a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 15px;
}

.navigation-dropdown--language .language-flag {
  width: 20px;
  height: 15px;
  flex-shrink: 0;
}

/* Mobile Navigation - Hamburger Menu */
.hamburger-menu {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 24px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
  position: absolute;
  top: 50%;
  right: 20px;
  transform: translateY(-50%);
}

.hamburger-line {
  width: 100%;
  height: 3px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger-menu--active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

.hamburger-menu--active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.hamburger-menu--active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(8px, -8px);
}

.hamburger-menu:hover .hamburger-line {
  background: var(--color-accent);
}

/* Mobile Styles */
@media (max-width: 768px) {
  .header {
    grid-template-columns: 1fr;
    justify-items: flex-start;
  }

  .header-logo {
    width: 100%;
    padding-left: 20px;
  }

  .navigation {
    position: relative;
    width: 100%;
    height: auto;
    justify-content: flex-start;
  }

  .hamburger-menu {
    display: flex;
  }

  .navigation-list {
    position: absolute;
    top: calc(100% + 20px);
    right: 0;
    left: 0;
    background: var(--color-background-nav);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0;
    margin: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  }

  .navigation-list--open {
    max-height: 600px;
  }

  .navigation-item {
    border-bottom: 1px solid var(--color-border);
  }

  .navigation-item:last-child {
    border-bottom: none;
  }

  .navigation-link {
    display: block;
    padding: 15px 20px;
    height: auto;
    text-align: left;
    border-radius: 0;
  }

  /* Dropdown in Mobile */
  .navigation-item--dropdown .navigation-link {
    position: relative;
  }

  .navigation-item--dropdown .navigation-dropdown {
    position: static;
    display: none;
    box-shadow: none;
    border: none;
    padding: 0;
    margin: 0;
  }

  .navigation-list--open .navigation-item--dropdown .navigation-dropdown {
    display: block;
  }

  .navigation-dropdown a {
    padding: 12px 40px;
    border-top: 1px solid var(--color-border);
  }
}

/* iPad Styles */
@media (min-width: 769px) and (max-width: 1024px) {
  .header {
    grid-template-columns: 1fr;
    justify-items: flex-start;
  }

  .header-logo {
    width: 100%;
    padding-left: 20px;
  }

  .navigation {
    position: relative;
    width: 100%;
    height: auto;
    justify-content: flex-start;
  }

  .hamburger-menu {
    display: flex;
  }

  .navigation-list {
    position: absolute;
    top: calc(100% + 20px);
    right: 0;
    left: 0;
    background: var(--color-background-nav);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0;
    margin: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  }

  .navigation-list--open {
    max-height: 600px;
  }

  .navigation-item {
    border-bottom: 1px solid var(--color-border);
  }

  .navigation-item:last-child {
    border-bottom: none;
  }

  .navigation-link {
    display: block;
    padding: 15px 20px;
    height: auto;
    text-align: left;
    border-radius: 0;
  }

  /* Dropdown in iPad */
  .navigation-item--dropdown .navigation-link {
    position: relative;
  }

  .navigation-item--dropdown .navigation-dropdown {
    position: static;
    display: none;
    box-shadow: none;
    border: none;
    padding: 0;
    margin: 0;
  }

  .navigation-list--open .navigation-item--dropdown .navigation-dropdown {
    display: block;
  }

  .navigation-dropdown a {
    padding: 12px 40px;
    border-top: 1px solid var(--color-border);
  }
}