/*
 * Layout shell: sidebar navigation, main content area, top header.
 * Extracted 2026-08-29 from an inline <style> block in application.html.erb.
 */
      html, body {
        height: 100%;
      }

      body.app-layout {
        min-height: 100vh;
        display: flex;
        flex-direction: column;
      }

      /* Sidebar Navigation Styles */
      .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        width: 280px;
        background: linear-gradient(180deg, var(--kv-sidebar-gradient-start) 0%, var(--kv-sidebar-gradient-end) 100%);
        border-right: 2px solid var(--kv-sidebar-border);
        z-index: 1000;
        overflow-y: auto;
        transition: all 0.3s ease;
      }

      .sidebar.collapsed {
        width: 80px;
      }

      .sidebar-header {
        padding: 1.5rem 1rem;
        border-bottom: 1px solid var(--kv-sidebar-border);
        text-align: center;
      }

      .sidebar-header .brand {
        color: var(--kv-accent);
        font-weight: bold;
        font-size: 1.2rem;
        text-decoration: none;
        display: flex;
        align-items: center;
        justify-content: center;
      }

      .sidebar-header .brand i {
        margin-right: 0.5rem;
        font-size: 1.5rem;
      }

      .sidebar.collapsed .brand-text {
        display: none;
      }

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

      .nav-item {
        margin: 0.2rem 0;
      }

      .nav-link {
        display: flex;
        align-items: center;
        padding: 0.75rem 1rem;
        color: var(--kv-sidebar-text-muted);
        text-decoration: none;
        transition: all 0.3s ease;
        border-radius: 0.5rem;
        margin: 0 0.5rem;
      }

      .nav-link:hover {
        background-color: var(--kv-accent-soft);
        color: var(--kv-accent);
        transform: translateX(5px);
      }

      .nav-link.active {
        background-color: var(--kv-accent);
        color: white;
      }

      .nav-link i {
        margin-right: 0.75rem;
        font-size: 1.1rem;
        width: 20px;
        text-align: center;
      }

      .sidebar.collapsed .nav-link span {
        display: none;
      }

      .nav-group {
        margin: 1rem 0;
      }

      .nav-group-title {
        color: #6c757d;
        font-size: 0.8rem;
        font-weight: 600;
        text-transform: uppercase;
        padding: 0.5rem 1rem;
        margin-bottom: 0.5rem;
      }

      .sidebar.collapsed .nav-group-title {
        display: none;
      }

      /* Main content area */
      .main-content {
        margin-left: 280px;
        min-height: 0;
        flex: 1 0 auto;
        display: flex;
        flex-direction: column;
        background-color: var(--kv-bg);
        transition: all 0.3s ease;
      }

      .main-content.expanded {
        margin-left: 80px;
      }

      .main-content.no-sidebar {
        margin-left: 0;
        background: transparent;
      }

      .top-header {
        background: white;
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        padding: 1rem 2rem;
        display: flex;
        justify-content: space-between;
        align-items: center;
      }

      .content-area {
        padding: 2rem;
        flex: 1 0 auto;
      }

      .controller-overview .content-area {
        padding-bottom: 0.75rem;
      }

      .controller-overview .site-footer {
        margin-top: 0;
      }

      /* Toggle button */
      .sidebar-toggle {
        position: absolute;
        top: 1rem;
        right: -15px;
        background: var(--kv-accent);
        color: white;
        border: none;
        border-radius: 50%;
        width: 30px;
        height: 30px;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        z-index: 1001;
      }

      /* Status indicators */
      .status-indicator {
        width: 8px;
        height: 8px;
        border-radius: 50%;
        display: inline-block;
        margin-left: auto;
      }

      .status-online { background-color: #28a745; }
      .status-warning { background-color: #ffc107; }
      .status-error { background-color: #dc3545; }

      /* Mobile responsive */
      @media (max-width: 768px) {
        .sidebar {
          transform: translateX(-100%);
        }
        
        .sidebar.mobile-open {
          transform: translateX(0);
        }
        
        .main-content {
          margin-left: 0;
        }

        .dashboard-switcher-wrap {
          min-width: 150px !important;
          max-width: 58vw !important;
        }
      }