/* ==========================================================================
   base2ace Academy - Collapsible Sidebar Layout Styles
   ========================================================================== */

/* Main Layout Grid with Sidebar */
.app-layout {
  display: flex;
  min-height: 100vh;
  position: relative;
}

/* Collapsible Left Sidebar */
.sidebar {
  width: 280px;
  background: rgba(11, 15, 25, 0.95);
  border-right: 1px solid var(--bg-surface-border);
  backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: sticky;
  top: 0;
  height: 100vh;
  z-index: 90;
  flex-shrink: 0;
}

.sidebar.collapsed {
  width: 68px;
}

/* Sidebar Brand Header */
.sidebar-header {
  padding: 1.25rem 1rem;
  border-bottom: 1px solid var(--bg-surface-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-main);
  overflow: hidden;
}

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

.toggle-sidebar-btn {
  background: var(--bg-surface);
  border: 1px solid var(--bg-surface-border);
  color: var(--text-muted);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}

.toggle-sidebar-btn:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: rgba(59, 130, 246, 0.1);
}

/* Sidebar Scrollable Menu Body */
.sidebar-nav {
  padding: 1.25rem 0.75rem;
  overflow-y: auto;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.sidebar-category {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.sidebar-cat-title {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.4rem 0.6rem;
  white-space: nowrap;
}

.sidebar.collapsed .sidebar-cat-title {
  display: none;
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.85rem;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  white-space: nowrap;
  position: relative;
}

.sidebar-item:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.sidebar-item.active {
  color: var(--primary);
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.sidebar-item-icon {
  font-size: 1.15rem;
  width: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sidebar-item-label {
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar.collapsed .sidebar-item-label {
  display: none;
}

/* Sidebar Footer / Academy Seal */
.sidebar-footer {
  padding: 1rem;
  border-top: 1px solid var(--bg-surface-border);
  font-size: 0.75rem;
  color: var(--text-dim);
  text-align: center;
}

.sidebar.collapsed .sidebar-footer {
  display: none;
}

/* Main Content Workspace */
.main-workspace {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--bg-main);
}

/* Workspace Header Bar */
.workspace-header {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--bg-surface-border);
  padding: 0.85rem 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 80;
  flex-wrap: wrap;
  gap: 1rem;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.breadcrumb-active {
  color: var(--text-main);
  font-weight: 700;
}

/* Dynamic Content Views */
.view-panel {
  display: none;
  padding: 1.75rem;
  animation: fadeInView 0.3s ease;
}

.view-panel.active-view {
  display: block;
}

@keyframes fadeInView {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Mobile & Tablet Responsive Navigation Drawer */
@media (max-width: 768px) {
  .app-layout {
    flex-direction: column;
    max-width: 100vw;
    overflow-x: hidden;
  }

  .main-workspace {
    width: 100%;
    max-width: 100vw;
    overflow-x: hidden;
  }

  .sidebar {
    width: 100% !important;
    height: auto;
    max-height: 100vh;
    position: sticky;
    top: 0;
    z-index: 100;
  }

  .sidebar.collapsed {
    width: 100% !important;
  }

  .sidebar-header {
    padding: 0.85rem 1rem;
  }

  .sidebar-nav {
    max-height: 60vh;
    overflow-y: auto;
    padding: 0.85rem;
    -webkit-overflow-scrolling: touch;
  }

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

  .sidebar.collapsed .sidebar-brand-text {
    display: inline-block;
  }

  .sidebar.collapsed .sidebar-footer {
    display: none;
  }

  .workspace-header {
    padding: 0.75rem 1rem;
    position: relative;
    top: 0;
  }

  .view-panel {
    padding: 1rem 0.75rem;
  }
}