/* ==========================================================================
   Layout Styles - Modern Dashboard (Sidebar, Header, Main Container)
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  font-family: var(--font-family);
  background-color: var(--bg-app);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-speed) var(--transition-timing),
              color var(--transition-speed) var(--transition-timing);
}

/* Base App Container */
.app-container {
  display: flex;
  min-height: 100vh;
  width: 100%;
  overflow-x: hidden;
  position: relative;
}

/* ==========================================================================
   Sidebar Navigation (Left)
   ========================================================================== */
.sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-surface);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 50;
  transition: width var(--transition-speed) var(--transition-timing),
              transform var(--transition-speed) var(--transition-timing),
              background-color var(--transition-speed) var(--transition-timing),
              border-color var(--transition-speed) var(--transition-timing);
}

.sidebar-header {
  height: var(--header-height);
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}

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

.brand-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary-500), #a855f7);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 4px 10px rgba(99, 102, 241, 0.35);
  flex-shrink: 0;
}

.brand-info {
  display: flex;
  flex-direction: column;
  transition: opacity var(--transition-speed) ease;
}

.brand-name {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.brand-badge {
  font-size: 0.65rem;
  padding: 0.15rem 0.45rem;
  background-color: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-full);
  font-weight: 600;
  border: 1px solid var(--primary-200);
}

.brand-tagline {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.sidebar-toggle-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.sidebar-toggle-btn:hover {
  background-color: var(--bg-surface-hover);
  color: var(--text-main);
  border-color: var(--border-focus);
}

/* Sidebar Nav Scroll Area */
.sidebar-nav-container {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 1rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  scrollbar-width: thin;
  scrollbar-color: var(--border-color) transparent;
}

.sidebar-nav-container::-webkit-scrollbar {
  width: 5px;
}
.sidebar-nav-container::-webkit-scrollbar-thumb {
  background-color: var(--border-color);
  border-radius: var(--radius-full);
}

.nav-group-title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 0 0.75rem 0.5rem;
  white-space: nowrap;
}

.nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.75rem;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  transition: all 0.2s ease;
  white-space: nowrap;
  position: relative;
  cursor: pointer;
}

.nav-link:hover {
  background-color: var(--bg-surface-hover);
  color: var(--text-main);
}

.nav-link.active {
  background-color: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}

.nav-link.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 15%;
  height: 70%;
  width: 4px;
  background-color: var(--primary);
  border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
}

.nav-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-label {
  flex: 1;
  transition: opacity var(--transition-speed) ease;
}

.nav-badge {
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  line-height: 1;
}

.nav-badge.badge-primary {
  background-color: var(--primary);
  color: #ffffff;
}

.nav-badge.badge-success {
  background-color: var(--success);
  color: #ffffff;
}

.nav-badge.badge-soft {
  background-color: var(--primary-light);
  color: var(--primary);
}

.nav-accordion-arrow {
  width: 16px;
  height: 16px;
  transition: transform 0.2s ease;
  color: var(--text-muted);
}

.nav-item.open > .nav-link .nav-accordion-arrow {
  transform: rotate(90deg);
}

.nav-submenu {
  list-style: none;
  padding-left: 2.2rem;
  padding-top: 0.25rem;
  display: none;
  flex-direction: column;
  gap: 0.2rem;
}

.nav-item.open .nav-submenu {
  display: flex;
}

.submenu-link {
  display: block;
  padding: 0.45rem 0.6rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.82rem;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.submenu-link:hover {
  color: var(--primary);
  background-color: var(--bg-surface-hover);
}

.submenu-link.active {
  color: var(--primary);
  font-weight: 600;
}

/* Sidebar Footer / Quota Card */
.sidebar-footer {
  padding: 1rem 0.85rem;
  border-top: 1px solid var(--border-color);
}

.quota-card {
  background: linear-gradient(135deg, var(--bg-surface-elevated), var(--bg-muted));
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  transition: all var(--transition-speed) ease;
}

.quota-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.quota-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.quota-badge {
  font-size: 0.65rem;
  background-color: var(--primary-light);
  color: var(--primary);
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-full);
  font-weight: 700;
}

.progress-bar-bg {
  width: 100%;
  height: 6px;
  background-color: var(--border-color);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-500), #a855f7);
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
}

.quota-text {
  font-size: 0.72rem;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
}

.btn-upgrade {
  width: 100%;
  padding: 0.4rem 0.5rem;
  background-color: var(--primary);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  transition: background-color 0.2s ease;
}

.btn-upgrade:hover {
  background-color: var(--primary-hover);
}

/* Collapsed Sidebar State (Desktop) */
.sidebar.collapsed {
  width: var(--sidebar-collapsed-width);
}

.sidebar.collapsed .brand-info,
.sidebar.collapsed .nav-group-title,
.sidebar.collapsed .nav-label,
.sidebar.collapsed .nav-badge,
.sidebar.collapsed .nav-accordion-arrow,
.sidebar.collapsed .nav-submenu,
.sidebar.collapsed .quota-card {
  display: none !important;
}

.sidebar.collapsed .sidebar-header {
  justify-content: center;
  padding: 0 0.5rem;
}

.sidebar.collapsed .nav-link {
  justify-content: center;
  padding: 0.75rem;
}

.sidebar.collapsed .sidebar-toggle-btn {
  transform: rotate(180deg);
}

/* ==========================================================================
   Main Wrapper (Header + Content)
   ========================================================================== */
.main-wrapper {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: margin-left var(--transition-speed) var(--transition-timing);
  position: relative;
  background-color: var(--bg-app);
}

.sidebar.collapsed ~ .main-wrapper {
  margin-left: var(--sidebar-collapsed-width);
}

/* ==========================================================================
   Header (Top Navigation)
   ========================================================================== */
.header {
  height: var(--header-height);
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.75rem;
  backdrop-filter: blur(8px);
  transition: background-color var(--transition-speed) var(--transition-timing),
              border-color var(--transition-speed) var(--transition-timing);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex: 1;
  max-width: 480px;
}

.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

/* Global Search Bar in Header */
.global-search-trigger {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  width: 100%;
  padding: 0.5rem 0.9rem;
  background-color: var(--bg-muted);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  font-size: 0.88rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.global-search-trigger:hover {
  background-color: var(--bg-surface-hover);
  border-color: var(--border-focus);
  color: var(--text-secondary);
}

.search-shortcut-badge {
  margin-left: auto;
  font-size: 0.7rem;
  font-family: var(--font-mono);
  font-weight: 600;
  padding: 0.15rem 0.45rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xs);
  color: var(--text-secondary);
}

/* Header Right Actions */
.header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header-btn {
  position: relative;
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.header-btn:hover {
  background-color: var(--bg-surface-hover);
  color: var(--text-main);
  border-color: var(--border-focus);
}

.header-btn .notification-badge {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 8px;
  height: 8px;
  background-color: var(--danger);
  border-radius: 50%;
  box-shadow: 0 0 0 2px var(--bg-surface);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(239, 68, 68, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

.header-divider {
  width: 1px;
  height: 28px;
  background-color: var(--border-color);
  margin: 0 0.25rem;
}

/* User Profile Dropdown Trigger */
.user-menu-trigger {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.35rem 0.65rem 0.35rem 0.35rem;
  border-radius: var(--radius-full);
  background: transparent;
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all 0.2s ease;
}

.user-menu-trigger:hover {
  background-color: var(--bg-surface-hover);
  border-color: var(--border-focus);
}

.user-avatar-wrapper {
  position: relative;
  width: 34px;
  height: 34px;
}

.user-avatar-img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  background-color: var(--primary-light);
  border: 1.5px solid var(--primary);
}

.user-status-indicator {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--success);
  border: 2px solid var(--bg-surface);
}

.user-info-text {
  text-align: left;
  display: flex;
  flex-direction: column;
}

.user-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.2;
}

.user-role {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.user-caret {
  color: var(--text-muted);
  transition: transform 0.2s ease;
}

/* ==========================================================================
   Page Content & Layout
   ========================================================================== */
.content-wrapper {
  flex: 1;
  padding: 2rem 2.25rem 3rem;
  max-width: 1540px;
  width: 100%;
  margin: 0 auto;
}

/* Breadcrumbs & Page Header */
.page-header {
  margin-bottom: 2rem;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  list-style: none;
}

.breadcrumb-item a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.breadcrumb-item a:hover {
  color: var(--primary);
}

.breadcrumb-separator {
  color: var(--text-muted);
}

.page-title-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 1rem;
}

.page-title {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.03em;
  margin-bottom: 0.25rem;
}

.page-subtitle {
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.page-actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

/* Mobile Overlay */
.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-overlay);
  backdrop-filter: blur(4px);
  z-index: 45;
  opacity: 0;
  transition: opacity var(--transition-speed) ease;
}

.sidebar-overlay.active {
  display: block;
  opacity: 1;
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.mobile-open {
    transform: translateX(0);
    box-shadow: var(--shadow-xl);
  }

  .main-wrapper,
  .sidebar.collapsed ~ .main-wrapper {
    margin-left: 0;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .sidebar-toggle-btn {
    display: none;
  }

  .content-wrapper {
    padding: 1.5rem 1.25rem 2.5rem;
  }
}

@media (max-width: 640px) {
  .header {
    padding: 0 1rem;
  }

  .user-info-text, .user-caret {
    display: none;
  }

  .global-search-trigger {
    width: auto;
    padding: 0.5rem;
  }

  .global-search-trigger span,
  .search-shortcut-badge {
    display: none;
  }
}