/* =============================================================
   Horizontal Top Navigation Bar (nav_postion = oben)
   Transforms sidebar into a horizontal navigation bar at desktop
   Uses CSS custom properties from design-system tokens
   ============================================================= */

@media (min-width: 1199px) {
  /* Sidebar becomes horizontal bar */
  .sidebar {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    width: 100%;
    min-height: 40px;
    z-index: 8000;
    transition: 0.3s;
    padding: 0;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    background-color: var(--color-nav-bg, #012970);
    overflow: visible;
    display: flex;
    align-items: center;
  }

  /* Flex layout for nav items */
  .sidebar-nav {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: nowrap;
    padding: 0;
    margin: 0;
    width: 100%;
    min-height: 40px;
  }

  .sidebar-nav li {
    display: flex;
    align-items: center;
    position: relative;
    flex-shrink: 0;
  }

  /* Nav links */
  .sidebar-nav .nav-link {
    color: var(--color-nav-text, #fff);
    padding: 0 14px;
    height: 40px;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 500;
    transition: background-color 0.2s, color 0.2s;
    border-radius: 0;
    margin: 0;
    position: relative;
    background: transparent;
  }

  .sidebar-nav .nav-link i {
    padding-right: 2px;
    font-size: 14px;
    color: var(--color-nav-text, #fff);
  }

  /* Dropdown submenus - MUST match nav bar background, not white! */
  .sidebar-nav .nav-content {
    position: absolute;
    top: calc(100% - 1px);
    left: 0;
    z-index: 999;
    background-color: var(--color-nav-bg, #012970);
    border-radius: 0 0 8px 8px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s, transform 0.2s;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    min-width: 240px;
    padding: 8px 0;
    transform: translateY(-4px);
  }

  .sidebar-nav li:focus-within .nav-content,
  .sidebar-nav li:hover .nav-content {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  /* Dropdown links */
  .sidebar-nav .nav-content a {
    color: var(--color-nav-text, #fff);
    padding: 10px 24px;
    display: block;
    width: 100%;
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
    transition: background-color 0.2s, padding-left 0.2s;
  }

  .sidebar-nav .nav-content a:hover {
    background-color: rgba(255, 255, 255, 0.12);
    padding-left: 30px;
    color: var(--color-nav-text, #fff);
  }

  /* Menu structure resets */
  .nav-item,
  .nav-item ul {
    padding: 0;
    margin: 0;
  }

  .nav-item ul {
    list-style: none;
  }

  .nav-item ul li {
    padding: 0;
    margin: 0;
  }

  /* Hide circle bullet icons in dropdown items */
  .nav-item ul li .bi-circle {
    display: none;
  }

  /* Hide sidebar toggle button */
  .toggle-sidebar-btn {
    display: none;
  }

  /* Dropdown items: full-width clickable */
  .nav-item li a {
    display: block;
    white-space: nowrap;
    min-width: 200px;
  }

  .sidebar .nav-link {
    margin-bottom: 0;
  }

  .sidebar .nav-content {
    border-top: none;
    margin-top: 0;
  }

  /* Main content positioning */
  #main {
    margin-left: auto !important;
    margin-right: auto !important;
    max-width: 1350px;
    margin-top: 120px !important;
  }

  /* Homepage hero: flush with nav, pull up past #main padding */
  .hero-landing-section {
    margin-top: -30px;
  }

  #progress-bar {
    position: sticky;
    top: 100px;
    width: 0%;
    height: 4px;
    background-color: #3498db;
    z-index: 99;
    pointer-events: none;
  }

  .welcomme {
    font-size: 30px !important;
  }
}

/* =============================================================
   Mobile/Tablet Sidebar (vertical mode)
   ============================================================= */
@media (max-width: 1199px) {
  .sidebar {
    position: fixed;
    top: 60px;
    left: 0;
    bottom: 0;
    width: 300px;
    z-index: 996;
    transition: 0.3s;
    padding: 20px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: #aab7cf transparent;
    box-shadow: 0 0 20px rgba(1, 41, 112, 0.1);
    background-color: var(--color-nav-bg, #fff);
  }

  .sidebar::-webkit-scrollbar {
    width: 5px;
    height: 8px;
    background-color: transparent;
  }

  .sidebar::-webkit-scrollbar-thumb {
    background-color: rgba(255, 255, 255, 0.3);
    border-radius: 4px;
  }

  .sidebar {
    left: -300px;
  }

  .toggle-sidebar .sidebar {
    left: 0;
  }

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

  .sidebar-nav .nav-item {
    margin-bottom: 5px;
  }

  .sidebar-nav .nav-heading {
    font-size: 11px;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.5);
    font-weight: 600;
    margin: 10px 0 5px 15px;
  }

  .sidebar-nav .nav-link {
    display: flex;
    align-items: center;
    font-size: 15px;
    font-weight: 600;
    color: var(--color-nav-text, #444);
    background: rgba(255, 255, 255, 0.08);
    padding: 10px 15px;
    border-radius: 4px;
  }

  .sidebar-nav .nav-link i {
    font-size: 16px;
    margin-right: 10px;
    color: var(--color-nav-text, #444);
  }

  .sidebar-nav .nav-link.collapsed {
    color: var(--color-nav-text, #444);
    background: transparent;
  }

  .sidebar-nav .nav-link.collapsed i {
    color: rgba(255, 255, 255, 0.5);
  }

  .sidebar-nav .nav-link:hover {
    color: var(--color-nav-text, #444);
    background: rgba(255, 255, 255, 0.12);
  }

  .sidebar-nav .nav-content a.active,
  .sidebar-nav .nav-content a:hover,
  .sidebar-nav .nav-link:hover i {
    color: var(--color-nav-text, #fff);
  }

  .sidebar-nav .nav-link .bi-chevron-down {
    margin-right: 0;
    transition: transform 0.2s ease-in-out;
  }

  .sidebar-nav .nav-link:not(.collapsed) .bi-chevron-down {
    transform: rotate(180deg);
  }

  .sidebar-nav .nav-content {
    padding: 5px 0 0 0;
    margin: 0;
    list-style: none;
  }

  .sidebar-nav .nav-content a {
    display: flex;
    align-items: center;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-nav-text, #fff);
    padding: 10px 0 10px 40px;
    transition: 0.3s;
  }

  .sidebar-nav .nav-content a i {
    font-size: 6px;
    margin-right: 8px;
    line-height: 0;
    border-radius: 50%;
  }

  .sidebar-nav .nav-content a.active i {
    background-color: var(--color-nav-text, #fff);
  }

  #progress-bar {
    position: sticky;
    top: 60px;
    width: 0%;
    height: 4px;
    background-color: #3498db;
    z-index: 99;
    pointer-events: none;
  }
}

/* =============================================================
   Shared: ST Header
   ============================================================= */
#stheader {
  height: 50vh;
  margin-top: 10px;
  left: 0;
  right: 0;
  margin-bottom: 30px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  padding-left: 50px;
  padding-top: 50px;
}