/**
 * WMS SaaS - Commercial Admin UI Design System
 * Modern, Clean, High-Contrast & Production Polished
 * Pure Local CSS - No External CDN Dependency
 */

:root {
  --primary: #1e40af;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --primary-border: #bfdbfe;
  
  --secondary: #475569;
  --secondary-light: #f1f5f9;
  
  --success: #059669;
  --success-light: #ecfdf5;
  --success-border: #a7f3d0;
  
  --danger: #dc2626;
  --danger-light: #fef2f2;
  --danger-border: #fecaca;
  
  --warning: #d97706;
  --warning-light: #fffbeb;
  --warning-border: #fde68a;
  
  --info: #0284c7;
  --info-light: #f0f9ff;
  --info-border: #bae6fd;
  
  --bg-body: #f8fafc;
  --bg-surface: #ffffff;
  --border-color: #e2e8f0;
  --border-color-dark: #cbd5e1;
  
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --sidebar-width: 260px;
  --navbar-height: 64px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.5;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

/* -------------------------------------------------------------
   Layout Framework: Sidebar + Main Content + Navbar
   ------------------------------------------------------------- */

.app-wrapper {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-width);
  background: #0f172a;
  color: #f8fafc;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
  overflow-y: auto;
  border-right: 1px solid #1e293b;
}

.sidebar-brand {
  height: var(--navbar-height);
  display: flex;
  align-items: center;
  padding: 0 20px;
  font-size: 18px;
  font-weight: 700;
  color: #ffffff;
  border-bottom: 1px solid #1e293b;
  gap: 10px;
  letter-spacing: -0.5px;
}

.sidebar-brand svg {
  width: 26px;
  height: 26px;
  fill: #38bdf8;
}

.sidebar-menu {
  list-style: none;
  padding: 16px 0;
  flex: 1;
}

.sidebar-heading {
  padding: 12px 20px 6px 20px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #64748b;
}

.sidebar-item a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 20px;
  color: #94a3b8;
  font-size: 13.5px;
  font-weight: 500;
  transition: all 0.2s ease;
  text-decoration: none;
}

.sidebar-item a:hover {
  color: #ffffff;
  background-color: #1e293b;
  text-decoration: none;
}

.sidebar-item.active a {
  color: #ffffff;
  background-color: var(--primary);
  font-weight: 600;
}

.sidebar-item svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  width: calc(100% - var(--sidebar-width));
}

.top-navbar {
  height: var(--navbar-height);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 90;
  width: 100%;
}

.top-navbar .tenant-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary-light);
  color: var(--primary);
  padding: 6px 12px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 12px;
  border: 1px solid var(--primary-border);
}

.top-navbar .user-profile {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
}

.page-container {
  padding: 24px;
  flex: 1;
  width: 100%;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.page-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.5px;
}

.page-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* -------------------------------------------------------------
   Cards, Metrics & Stats
   ------------------------------------------------------------- */

.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
  overflow: hidden;
}

.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #ffffff;
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
}

.card-body {
  padding: 20px;
}

.grid-cols-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.grid-cols-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.grid-cols-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.metric-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
}

.metric-val {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}

.metric-label {
  font-size: 12.5px;
  color: var(--text-muted);
  font-weight: 500;
  margin-top: 4px;
}

.metric-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* -------------------------------------------------------------
   Tables & Data Presentation
   ------------------------------------------------------------- */

.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13.5px;
}

.table th {
  background: #f8fafc;
  padding: 12px 16px;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-main);
  vertical-align: middle;
}

.table tr:hover td {
  background-color: #f8fafc;
}

/* -------------------------------------------------------------
   Buttons & CRUD Action Icons
   ------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease-in-out;
  text-decoration: none;
}

.btn:hover {
  text-decoration: none;
}

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

.btn-secondary {
  background: var(--secondary-light);
  color: var(--secondary);
  border-color: var(--border-color);
}
.btn-secondary:hover {
  background: #e2e8f0;
}

.btn-danger {
  background: var(--danger);
  color: #ffffff;
}
.btn-danger:hover {
  background: #b91c1c;
}

.btn-sm {
  padding: 4px 10px;
  font-size: 12px;
}

/* Specific CRUD Table Action Icons */
.btn-action {
  width: 32px;
  height: 32px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: #ffffff;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-action svg {
  width: 15px;
  height: 15px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

/* View (Eye) */
.btn-action.view:hover {
  color: var(--info);
  border-color: var(--info-border);
  background: var(--info-light);
}

/* Edit (Pencil) */
.btn-action.edit:hover {
  color: var(--warning);
  border-color: var(--warning-border);
  background: var(--warning-light);
}

/* Delete (Trash) */
.btn-action.delete:hover {
  color: var(--danger);
  border-color: var(--danger-border);
  background: var(--danger-light);
}

/* Permission (Shield) */
.btn-action.shield:hover {
  color: var(--primary);
  border-color: var(--primary-border);
  background: var(--primary-light);
}

/* -------------------------------------------------------------
   Badges, Status & Alerts
   ------------------------------------------------------------- */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  font-size: 11.5px;
  font-weight: 600;
  line-height: 1;
}

.badge-success { background: var(--success-light); color: var(--success); border: 1px solid var(--success-border); }
.badge-danger  { background: var(--danger-light);  color: var(--danger);  border: 1px solid var(--danger-border); }
.badge-warning { background: var(--warning-light); color: var(--warning); border: 1px solid var(--warning-border); }
.badge-info    { background: var(--info-light);    color: var(--info);    border: 1px solid var(--info-border); }
.badge-neutral { background: #f1f5f9; color: #475569; border: 1px solid #cbd5e1; }

.alert {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  font-size: 13.5px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.alert-success { background: var(--success-light); color: #065f46; border: 1px solid var(--success-border); }
.alert-danger  { background: var(--danger-light);  color: #991b1b; border: 1px solid var(--danger-border); }
.alert-warning { background: var(--warning-light); color: #92400e; border: 1px solid var(--warning-border); }
.alert-info    { background: var(--info-light);    color: #075985; border: 1px solid var(--info-border); }

/* -------------------------------------------------------------
   Forms & Controls
   ------------------------------------------------------------- */

.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border-color-dark);
  border-radius: var(--radius-md);
  font-size: 13.5px;
  background: #ffffff;
  color: var(--text-main);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.12);
}

.search-input {
  max-width: 320px;
}

/* -------------------------------------------------------------
   Modals
   ------------------------------------------------------------- */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.5);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
}

.modal-dialog {
  background: #ffffff;
  border-radius: var(--radius-lg);
  max-width: 600px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: modalFadeIn 0.2s ease-out;
}

@keyframes modalFadeIn {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 16px;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: var(--text-muted);
}

.modal-body {
  padding: 20px;
  max-height: 70vh;
  overflow-y: auto;
}

.modal-footer {
  padding: 14px 20px;
  background: #f8fafc;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* -------------------------------------------------------------
   Responsive Layout & Mobile / Tablet Support
   ------------------------------------------------------------- */

@media (max-width: 1024px) {
  :root {
    --sidebar-width: 220px;
  }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }
  
  .sidebar.show {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
    width: 100%;
  }

  .grid-cols-4,
  .grid-cols-3,
  .grid-cols-2 {
    grid-template-columns: 1fr;
  }

  .top-navbar {
    padding: 0 16px;
  }

  .page-container {
    padding: 16px;
  }
}