/* ==========================================================
   INVENTORY MANAGEMENT SYSTEM — Design System
   Enterprise UI · Clean · Professional · Accessible
   ========================================================== */

/* ----------------------------------------------------------
   1. CSS VARIABLES — Design Tokens
   ---------------------------------------------------------- */
:root {
  /* Colors — Primary */
  --color-primary:        #2563eb;
  --color-primary-dark:   #1d4ed8;
  --color-primary-light:  #eff6ff;
  --color-primary-border: #bfdbfe;

  /* Colors — Semantic */
  --color-success:        #16a34a;
  --color-success-light:  #f0fdf4;
  --color-success-border: #bbf7d0;
  --color-warning:        #d97706;
  --color-warning-light:  #fffbeb;
  --color-warning-border: #fde68a;
  --color-danger:         #dc2626;
  --color-danger-light:   #fef2f2;
  --color-danger-border:  #fecaca;
  --color-info:           #0891b2;
  --color-info-light:     #ecfeff;
  --color-info-border:    #a5f3fc;

  /* Colors — Neutral */
  --color-gray-50:  #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;
  --color-gray-900: #0f172a;

  /* Sidebar */
  --sidebar-width:  260px;
  --sidebar-bg:     #0f172a;
  --sidebar-hover:  rgba(255,255,255,0.06);
  --sidebar-active: rgba(37,99,235,0.85);

  /* Navbar */
  --navbar-height:  60px;
  --navbar-bg:      #1e293b;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs:  0 1px 2px rgba(0,0,0,0.05);
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.07), 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md:  0 4px 6px rgba(0,0,0,0.06), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg:  0 10px 15px rgba(0,0,0,0.08), 0 4px 6px rgba(0,0,0,0.04);
  --shadow-xl:  0 20px 25px rgba(0,0,0,0.1), 0 8px 10px rgba(0,0,0,0.05);

  /* Transitions */
  --transition-fast: 120ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
}

/* ----------------------------------------------------------
   2. RESET & BASE
   ---------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html { font-size: 14px; scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background-color: var(--color-gray-100);
  color: var(--color-gray-800);
  padding-top: var(--navbar-height);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ----------------------------------------------------------
   3. LAYOUT — Navbar
   ---------------------------------------------------------- */
.app-navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--navbar-height);
  background: var(--navbar-bg);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0 var(--space-4);
  z-index: 1040;
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

/* Brand */
.app-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: #fff;
  white-space: nowrap;
  flex-shrink: 0;
}
.app-brand-icon {
  width: 34px; height: 34px;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.app-brand-icon i { font-size: 17px; color: #fff; }
.app-brand-text { display: flex; flex-direction: column; }
.app-brand-name {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.2px;
  color: #fff;
  line-height: 1;
}
.app-brand-sub {
  font-size: 10px;
  color: var(--color-gray-400);
  font-weight: 400;
  margin-top: 1px;
}

/* User chip */
.navbar-user {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px var(--space-3);
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  flex-shrink: 0;
}
.navbar-user-avatar {
  width: 30px; height: 30px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px;
  color: #fff;
  font-weight: 600;
  flex-shrink: 0;
  text-transform: uppercase;
}
.navbar-user-info { display: flex; flex-direction: column; }
.navbar-user-name {
  font-size: 13px;
  font-weight: 500;
  color: #fff;
  line-height: 1.2;
}
.navbar-user-role {
  font-size: 10px;
  color: var(--color-gray-400);
}

/* Logout button */
.btn-navbar-logout {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: 6px 14px;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-md);
  color: var(--color-gray-300);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-base);
  white-space: nowrap;
  flex-shrink: 0;
}
.btn-navbar-logout:hover {
  background: rgba(220,38,38,0.15);
  border-color: rgba(220,38,38,0.3);
  color: #fca5a5;
}
.btn-navbar-logout i { font-size: 14px; }

/* Sidebar toggle button */
.btn-sidebar-toggle {
  width: 36px; height: 36px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  display: none; /* hidden on desktop, shown on mobile via media query */
  align-items: center;
  justify-content: center;
  color: var(--color-gray-300);
  cursor: pointer;
  transition: all var(--transition-base);
  flex-shrink: 0;
}
.btn-sidebar-toggle:hover {
  background: rgba(255,255,255,0.1);
  color: #fff;
}

/* ----------------------------------------------------------
   4. LAYOUT — Sidebar
   ---------------------------------------------------------- */
.app-sidebar {
  position: fixed;
  top: var(--navbar-height);
  left: 0;
  width: var(--sidebar-width);
  height: calc(100vh - var(--navbar-height));
  background: var(--sidebar-bg);
  border-right: 1px solid rgba(255,255,255,0.05);
  overflow-y: auto;
  overflow-x: hidden;
  z-index: 1030;
  padding: var(--space-4) var(--space-3);
  transition: transform var(--transition-slow);
}

.app-sidebar::-webkit-scrollbar { width: 4px; }
.app-sidebar::-webkit-scrollbar-track { background: transparent; }
.app-sidebar::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.1);
  border-radius: var(--radius-full);
}
.app-sidebar::-webkit-scrollbar-thumb:hover {
  background: rgba(255,255,255,0.2);
}

/* Sidebar nav section label */
.sidebar-section-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-gray-500);
  text-transform: uppercase;
  padding: var(--space-4) var(--space-3) var(--space-2);
  display: block;
}

/* Sidebar nav link */
.sidebar-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 9px var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-gray-400);
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 450;
  margin-bottom: 2px;
  transition: all var(--transition-base);
  position: relative;
  white-space: nowrap;
  overflow: hidden;
}
.sidebar-nav-link i {
  font-size: 16px;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
  transition: transform var(--transition-base);
}
.sidebar-nav-link:hover {
  background: var(--sidebar-hover);
  color: #e2e8f0;
}
.sidebar-nav-link:hover i { transform: scale(1.1); }

.sidebar-nav-link.active {
  background: var(--sidebar-active);
  color: #fff;
  font-weight: 500;
  box-shadow: 0 2px 8px rgba(37,99,235,0.35);
}
.sidebar-nav-link.active i { color: #fff; }

/* Active indicator bar */
.sidebar-nav-link.active::before {
  content: '';
  position: absolute;
  left: 0; top: 20%; bottom: 20%;
  width: 3px;
  background: #60a5fa;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.sidebar-divider {
  height: 1px;
  background: rgba(255,255,255,0.06);
  margin: var(--space-3) 0;
}

/* ----------------------------------------------------------
   5. LAYOUT — Main Content
   ---------------------------------------------------------- */
.app-content {
  margin-left: var(--sidebar-width);
  min-height: calc(100vh - var(--navbar-height));
  padding: var(--space-6);
  transition: margin-left var(--transition-slow);
}

/* ----------------------------------------------------------
   6. PAGE HEADER
   ---------------------------------------------------------- */
.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-gray-200);
}
.page-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-gray-900);
  margin: 0;
  line-height: 1.3;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.page-title i {
  font-size: 18px;
  color: var(--color-primary);
}
.page-subtitle {
  font-size: 13px;
  color: var(--color-gray-500);
  margin-top: 2px;
}

/* ----------------------------------------------------------
   7. KPI / STAT CARDS
   ---------------------------------------------------------- */
.stat-card {
  background: #fff;
  border-radius: var(--radius-xl);
  padding: var(--space-5) var(--space-6);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-200);
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
  position: relative;
  overflow: hidden;
}
.stat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.stat-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--stat-accent, var(--color-primary));
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.stat-card-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}
.stat-card-body { flex: 1; min-width: 0; }
.stat-card-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-1);
}
.stat-card-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-gray-900);
  line-height: 1.1;
  letter-spacing: -0.5px;
}
.stat-card-meta {
  font-size: 12px;
  color: var(--color-gray-500);
  margin-top: var(--space-1);
}

/* Accent variants */
.stat-card--blue   { --stat-accent: var(--color-primary); }
.stat-card--green  { --stat-accent: var(--color-success); }
.stat-card--red    { --stat-accent: var(--color-danger);  }
.stat-card--amber  { --stat-accent: var(--color-warning); }

.stat-icon--blue  { background: var(--color-primary-light); color: var(--color-primary); }
.stat-icon--green { background: var(--color-success-light); color: var(--color-success); }
.stat-icon--red   { background: var(--color-danger-light);  color: var(--color-danger);  }
.stat-icon--amber { background: var(--color-warning-light); color: var(--color-warning); }

/* ----------------------------------------------------------
   8. DATA TABLE
   ---------------------------------------------------------- */
.data-table-wrapper {
  background: #fff;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.data-table-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-gray-200);
  background: var(--color-gray-50);
}
.data-table-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-gray-800);
}
.data-table-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* Search input */
.search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}
.search-input-wrapper .search-icon {
  position: absolute;
  left: 10px;
  color: var(--color-gray-400);
  font-size: 14px;
  pointer-events: none;
}
.search-input {
  padding: 7px 12px 7px 32px;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  background: #fff;
  font-size: 13px;
  color: var(--color-gray-800);
  width: 220px;
  transition: all var(--transition-base);
  outline: none;
}
.search-input::placeholder { color: var(--color-gray-400); }
.search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

/* Limit select */
.limit-select-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.limit-select-wrapper label {
  font-size: 12px;
  color: var(--color-gray-500);
  white-space: nowrap;
}
.limit-select {
  padding: 6px 10px;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  background: #fff;
  font-size: 13px;
  color: var(--color-gray-800);
  cursor: pointer;
  transition: border-color var(--transition-base);
  outline: none;
}
.limit-select:focus { border-color: var(--color-primary); }

/* Table itself */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}
.data-table thead th {
  padding: 11px var(--space-4);
  text-align: left;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--color-gray-50);
  border-bottom: 1px solid var(--color-gray-200);
  white-space: nowrap;
  user-select: none;
}
.data-table thead th:first-child { padding-left: var(--space-5); }
.data-table thead th:last-child  { padding-right: var(--space-5); }

.data-table tbody td {
  padding: 12px var(--space-4);
  border-bottom: 1px solid var(--color-gray-100);
  color: var(--color-gray-700);
  vertical-align: middle;
}
.data-table tbody td:first-child { padding-left: var(--space-5); }
.data-table tbody td:last-child  { padding-right: var(--space-5); }

.data-table tbody tr {
  transition: background-color var(--transition-fast);
}
.data-table tbody tr:hover {
  background-color: var(--color-primary-light);
}
.data-table tbody tr:last-child td { border-bottom: none; }

/* Empty state */
.table-empty {
  text-align: center;
  padding: 48px var(--space-6);
  color: var(--color-gray-400);
}
.table-empty i { font-size: 40px; display: block; margin-bottom: var(--space-3); }
.table-empty p { font-size: 14px; margin: 0; }

/* ----------------------------------------------------------
   9. BADGES
   ---------------------------------------------------------- */
.badge-pill {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 11.5px;
  font-weight: 500;
  line-height: 1.4;
  white-space: nowrap;
}
.badge-primary { background: var(--color-primary-light); color: var(--color-primary); border: 1px solid var(--color-primary-border); }
.badge-success { background: var(--color-success-light); color: var(--color-success); border: 1px solid var(--color-success-border); }
.badge-warning { background: var(--color-warning-light); color: var(--color-warning); border: 1px solid var(--color-warning-border); }
.badge-danger  { background: var(--color-danger-light);  color: var(--color-danger);  border: 1px solid var(--color-danger-border); }
.badge-info    { background: var(--color-info-light);    color: var(--color-info);    border: 1px solid var(--color-info-border); }
.badge-neutral { background: var(--color-gray-100);      color: var(--color-gray-600); border: 1px solid var(--color-gray-200); }

/* Role badge */
.role-admin  { background:#fef2f2; color:#b91c1c; border:1px solid #fecaca; }
.role-staff  { background:#eff6ff; color:#1d4ed8; border:1px solid #bfdbfe; }
.role-viewer { background:#f8fafc; color:#475569; border:1px solid #e2e8f0; }

/* HTTP Method badge */
.method-get    { background:#f0fdf4; color:#166534; border:1px solid #bbf7d0; }
.method-post   { background:#eff6ff; color:#1e40af; border:1px solid #bfdbfe; }
.method-put    { background:#fffbeb; color:#92400e; border:1px solid #fde68a; }
.method-delete { background:#fef2f2; color:#b91c1c; border:1px solid #fecaca; }

/* ----------------------------------------------------------
   10. PAGINATION
   ---------------------------------------------------------- */
.pagination-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-gray-200);
  background: var(--color-gray-50);
}
.pagination-info {
  font-size: 12.5px;
  color: var(--color-gray-500);
}
.pagination-info strong { color: var(--color-gray-700); font-weight: 600; }

.pagination-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.page-btn {
  min-width: 32px; height: 32px;
  padding: 0 var(--space-2);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  background: #fff;
  color: var(--color-gray-600);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  font-family: var(--font-sans);
}
.page-btn:hover:not(.disabled):not(.active) {
  background: var(--color-gray-100);
  border-color: var(--color-gray-300);
  color: var(--color-gray-800);
}
.page-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 1px 4px rgba(37,99,235,0.35);
}
.page-btn.disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}
.page-btn i { font-size: 12px; }

/* ----------------------------------------------------------
   11. BUTTONS
   ---------------------------------------------------------- */
.btn-primary-app {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 8px 16px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-base);
  line-height: 1;
  white-space: nowrap;
}
.btn-primary-app:hover {
  background: var(--color-primary-dark);
  color: #fff;
  box-shadow: 0 2px 8px rgba(37,99,235,0.3);
  transform: translateY(-1px);
}
.btn-primary-app:active { transform: translateY(0); }
.btn-primary-app i { font-size: 14px; }

.btn-outline-app {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 7px 15px;
  background: #fff;
  color: var(--color-gray-600);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-base);
  line-height: 1;
  white-space: nowrap;
}
.btn-outline-app:hover {
  background: var(--color-gray-50);
  border-color: var(--color-gray-300);
  color: var(--color-gray-800);
}
.btn-outline-app i { font-size: 14px; }

.btn-danger-app {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 8px 16px;
  background: var(--color-danger);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-base);
  line-height: 1;
  white-space: nowrap;
}
.btn-danger-app:hover {
  background: #b91c1c;
  color: #fff;
  box-shadow: 0 2px 8px rgba(220,38,38,0.3);
}

/* Icon-only action buttons in table */
.action-btn {
  width: 30px; height: 30px;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}
.action-btn-edit {
  color: var(--color-warning);
  background: var(--color-warning-light);
  border-color: var(--color-warning-border);
}
.action-btn-edit:hover {
  background: #fde68a;
  color: #92400e;
}
.action-btn-delete {
  color: var(--color-danger);
  background: var(--color-danger-light);
  border-color: var(--color-danger-border);
}
.action-btn-delete:hover {
  background: #fecaca;
  color: #b91c1c;
}

/* ----------------------------------------------------------
   12. FORMS — Enterprise Style
   ---------------------------------------------------------- */
.form-card {
  background: #fff;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-sm);
  max-width: 680px;
}
.form-card-header {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-gray-200);
  background: var(--color-gray-50);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}
.form-card-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-gray-800);
  margin: 0;
}
.form-card-body { padding: var(--space-5) var(--space-6); }
.form-card-footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-gray-100);
  background: var(--color-gray-50);
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  display: flex;
  gap: var(--space-2);
  justify-content: flex-end;
}

.form-row { margin-bottom: var(--space-4); }

.form-label-app {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-gray-700);
  margin-bottom: 6px;
}
.form-label-app .required {
  color: var(--color-danger);
  margin-left: 3px;
}

.form-control-app {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  background: #fff;
  font-size: 13.5px;
  color: var(--color-gray-800);
  transition: all var(--transition-base);
  outline: none;
  font-family: var(--font-sans);
  line-height: 1.5;
}
.form-control-app::placeholder { color: var(--color-gray-400); }
.form-control-app:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.form-control-app:disabled,
.form-control-app[readonly] {
  background: var(--color-gray-50);
  color: var(--color-gray-500);
  cursor: not-allowed;
}

.form-hint {
  font-size: 12px;
  color: var(--color-gray-400);
  margin-top: 5px;
}
.form-error {
  font-size: 12px;
  color: var(--color-danger);
  margin-top: 5px;
  display: none;
}
.form-control-app.is-invalid { border-color: var(--color-danger); }
.form-control-app.is-invalid + .form-error { display: block; }
.form-control-app.is-invalid:focus {
  box-shadow: 0 0 0 3px rgba(220,38,38,0.1);
}

/* ----------------------------------------------------------
   13. FILTER PANEL
   ---------------------------------------------------------- */
.filter-panel {
  background: #fff;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  padding: var(--space-4) var(--space-5);
  margin-bottom: var(--space-4);
  box-shadow: var(--shadow-xs);
}
.filter-panel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-3);
  align-items: end;
}

/* ----------------------------------------------------------
   14. ALERTS & EMPTY STATES
   ---------------------------------------------------------- */
.alert-app {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  font-size: 13.5px;
  border: 1px solid transparent;
}
.alert-app i { font-size: 18px; flex-shrink: 0; margin-top: 1px; }
.alert-app-info    { background:#eff6ff; color:#1e40af; border-color:#bfdbfe; }
.alert-app-success { background:#f0fdf4; color:#166534; border-color:#bbf7d0; }
.alert-app-warning { background:#fffbeb; color:#92400e; border-color:#fde68a; }
.alert-app-danger  { background:#fef2f2; color:#991b1b; border-color:#fecaca; }

.empty-state {
  text-align: center;
  padding: 64px var(--space-6);
}
.empty-state-icon {
  font-size: 48px;
  color: var(--color-gray-300);
  margin-bottom: var(--space-4);
  display: block;
}
.empty-state-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: var(--space-2);
}
.empty-state-desc {
  font-size: 13.5px;
  color: var(--color-gray-400);
  margin-bottom: var(--space-5);
}

/* ----------------------------------------------------------
   15. LOGIN PAGE
   ---------------------------------------------------------- */
.login-page {
  min-height: 100vh;
  background: var(--color-gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
}
.login-card {
  background: #fff;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 420px;
  overflow: hidden;
  border: 1px solid var(--color-gray-200);
}
.login-card-header {
  background: var(--color-gray-900);
  padding: var(--space-8) var(--space-6);
  text-align: center;
}
.login-logo {
  width: 56px; height: 56px;
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  color: #fff;
  margin-bottom: var(--space-4);
}
.login-app-name {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin: 0;
  letter-spacing: -0.3px;
}
.login-app-sub {
  font-size: 12.5px;
  color: var(--color-gray-400);
  margin-top: var(--space-1);
}
.login-card-body { padding: var(--space-6); }
.login-section-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-gray-800);
  margin-bottom: var(--space-5);
  text-align: center;
}

/* ----------------------------------------------------------
   16. CODE / MONOSPACE
   ---------------------------------------------------------- */
code, .code {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--color-gray-100);
  color: var(--color-primary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-gray-200);
}

/* ----------------------------------------------------------
   17. MISC UTILITIES
   ---------------------------------------------------------- */
.text-truncate-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.font-mono { font-family: var(--font-mono); }
.text-xs    { font-size: 11px; }
.text-sm    { font-size: 12.5px; }
.text-base  { font-size: 13.5px; }
.text-muted-app { color: var(--color-gray-400); }

/* ----------------------------------------------------------
   18. RESPONSIVE
   ---------------------------------------------------------- */

/* ── Desktop (≥1024px): sidebar selalu tampil, toggle tersembunyi ── */
@media (min-width: 1024px) {
  .btn-sidebar-toggle {
    display: none;
  }
  .app-sidebar {
    transform: translateX(0) !important;
  }
  .app-content {
    margin-left: var(--sidebar-width);
  }
  .navbar-user-info { display: flex; } /* pastikan info tampil */
}

/* ── Tablet & Mobile (<1024px): sidebar slide-in, toggle tampil ── */
@media (max-width: 1023px) {
  .btn-sidebar-toggle {
    display: flex; /* tampilkan hamburger */
  }
  .app-sidebar {
    transform: translateX(calc(-1 * var(--sidebar-width)));
    box-shadow: none;
  }
  .app-sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-xl);
  }
  .app-content {
    margin-left: 0;
    padding: var(--space-4);
  }
  /* Backdrop overlay */
  .sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1029;
    backdrop-filter: blur(2px);
  }
  .sidebar-backdrop.show { display: block; }
}

/* ── Mobile kecil (<640px): sembunyikan label teks tertentu di navbar ── */
@media (max-width: 639px) {
  .app-brand-sub      { display: none; }   /* sembunyikan "Management System" */
  .navbar-user-info   { display: none; }   /* sembunyikan nama+role, avatar tetap tampil */
  .btn-logout-text    { display: none; }   /* hanya icon logout */
  .btn-navbar-logout  { padding: 6px 10px; }

  .app-content        { padding: var(--space-3); }
  .page-header        { flex-direction: column; align-items: stretch; }
  .data-table-toolbar { flex-direction: column; align-items: stretch; }
  .search-input       { width: 100%; }
  .pagination-wrapper { flex-direction: column; align-items: center; }
  .stat-card          { padding: var(--space-4); }
  .stat-card-value    { font-size: 22px; }
  .data-table         { font-size: 12.5px; }
  .data-table thead th,
  .data-table tbody td { padding: 10px 12px; }
  .form-card          { border-radius: var(--radius-lg); }
}

/* ── Layar sangat kecil (<400px): brand text disembunyikan ── */
@media (max-width: 399px) {
  .app-brand-name { display: none; }
}

/* ----------------------------------------------------------
   19. PRINT
   ---------------------------------------------------------- */
@media print {
  .app-navbar, .app-sidebar, .page-header .btn-primary-app,
  .data-table-toolbar, .pagination-wrapper { display: none !important; }
  .app-content { margin-left: 0; padding: 0; }
  body { background: #fff; }
}