/* ============================================
   Grubflip Admin Dashboard — Core Styles
   Mobile-first responsive design
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--gf-font-body);
  font-size: var(--gf-text-base);
  color: var(--gf-neutral-800);
  background: var(--gf-bg-subtle);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--gf-font-heading);
  font-weight: var(--gf-weight-bold);
  line-height: 1.2;
  color: var(--gf-neutral-900);
}

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

img { max-width: 100%; height: auto; }

/* --- Layout Shell --- */
.admin-layout {
  display: flex;
  min-height: 100vh;
}

/* --- Sidebar --- */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--gf-sidebar-width);
  height: 100vh;
  background: var(--gf-bg-dark);
  color: var(--gf-neutral-300);
  display: flex;
  flex-direction: column;
  z-index: var(--gf-z-fixed);
  transform: translateX(-100%);
  transition: transform var(--gf-duration-slow) var(--gf-ease);
  overflow-y: auto;
}

.sidebar.open {
  transform: translateX(0);
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: calc(var(--gf-z-fixed) - 1);
}

.sidebar-overlay.visible {
  display: block;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--gf-space-3);
  padding: var(--gf-space-6) var(--gf-space-5);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-brand .logo-icon {
  width: 2rem;
  height: 2rem;
  background: var(--gf-primary);
  border-radius: var(--gf-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: #fff;
  font-weight: var(--gf-weight-bold);
  flex-shrink: 0;
}

.sidebar-brand span {
  font-family: var(--gf-font-heading);
  font-size: var(--gf-text-lg);
  font-weight: var(--gf-weight-bold);
  color: #fff;
}

.sidebar-nav {
  flex: 1;
  padding: var(--gf-space-4) 0;
}

.sidebar-section-title {
  font-size: var(--gf-text-xs);
  font-weight: var(--gf-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--gf-neutral-500);
  padding: var(--gf-space-4) var(--gf-space-5) var(--gf-space-2);
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--gf-space-3);
  padding: var(--gf-space-3) var(--gf-space-5);
  color: var(--gf-neutral-300);
  font-size: var(--gf-text-sm);
  font-weight: var(--gf-weight-medium);
  transition: all var(--gf-duration-fast) var(--gf-ease);
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.sidebar-link:hover {
  background: rgba(255,255,255,0.05);
  color: #fff;
}

.sidebar-link.active {
  background: rgba(255,107,53,0.15);
  color: var(--gf-primary);
}

.sidebar-link .icon {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.sidebar-footer {
  padding: var(--gf-space-4) var(--gf-space-5);
  border-top: 1px solid rgba(255,255,255,0.08);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--gf-space-3);
}

.sidebar-user .avatar {
  width: 2rem;
  height: 2rem;
  border-radius: var(--gf-radius-full);
  background: var(--gf-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--gf-text-xs);
  font-weight: var(--gf-weight-semibold);
  flex-shrink: 0;
}

.sidebar-user .user-info {
  overflow: hidden;
}

.sidebar-user .user-name {
  font-size: var(--gf-text-sm);
  font-weight: var(--gf-weight-medium);
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-user .user-role {
  font-size: var(--gf-text-xs);
  color: var(--gf-neutral-400);
}

/* --- Main Content --- */
.main-content {
  flex: 1;
  width: 100%;
  min-height: 100vh;
}

/* --- Top Bar --- */
.topbar {
  position: sticky;
  top: 0;
  background: var(--gf-bg);
  height: var(--gf-navbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--gf-space-4);
  border-bottom: 1px solid var(--gf-neutral-200);
  z-index: var(--gf-z-sticky);
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: var(--gf-space-3);
}

.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border: none;
  background: none;
  cursor: pointer;
  border-radius: var(--gf-radius-md);
  color: var(--gf-neutral-600);
  font-size: 1.25rem;
  transition: background var(--gf-duration-fast);
}

.menu-toggle:hover {
  background: var(--gf-neutral-100);
}

.topbar-title {
  font-family: var(--gf-font-heading);
  font-size: var(--gf-text-lg);
  font-weight: var(--gf-weight-semibold);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: var(--gf-space-2);
}

.topbar-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border: none;
  background: none;
  cursor: pointer;
  border-radius: var(--gf-radius-full);
  color: var(--gf-neutral-600);
  font-size: 1.1rem;
  position: relative;
  transition: background var(--gf-duration-fast);
}

.topbar-btn:hover {
  background: var(--gf-neutral-100);
}

.topbar-btn .badge-dot {
  position: absolute;
  top: 0.4rem;
  right: 0.4rem;
  width: 0.5rem;
  height: 0.5rem;
  background: var(--gf-error);
  border-radius: var(--gf-radius-full);
  border: 2px solid var(--gf-bg);
}

/* --- Page Content --- */
.page-content {
  padding: var(--gf-space-4);
}

.page-header {
  margin-bottom: var(--gf-space-6);
}

.page-header h1 {
  font-size: var(--gf-text-2xl);
  margin-bottom: var(--gf-space-1);
}

.page-header .subtitle {
  color: var(--gf-neutral-500);
  font-size: var(--gf-text-sm);
}

/* --- Cards --- */
.card {
  background: var(--gf-bg);
  border-radius: var(--gf-radius-lg);
  box-shadow: var(--gf-shadow-card);
  border: 1px solid var(--gf-neutral-200);
  padding: var(--gf-space-6);
  transition: box-shadow var(--gf-duration-normal) var(--gf-ease);
}

.card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.12);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--gf-space-4);
}

.card-header h2 {
  font-size: var(--gf-text-lg);
  font-weight: var(--gf-weight-semibold);
}

/* --- Stat Cards --- */
.stats-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gf-space-4);
  margin-bottom: var(--gf-space-6);
}

.stat-card {
  background: var(--gf-bg);
  border-radius: var(--gf-radius-lg);
  box-shadow: var(--gf-shadow-card);
  border: 1px solid var(--gf-neutral-200);
  padding: var(--gf-space-5);
  display: flex;
  align-items: flex-start;
  gap: var(--gf-space-4);
}

.stat-icon {
  width: 3rem;
  height: 3rem;
  border-radius: var(--gf-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.stat-icon.orange { background: var(--gf-primary-bg); color: var(--gf-primary); }
.stat-icon.green { background: var(--gf-secondary-bg); color: var(--gf-secondary); }
.stat-icon.yellow { background: var(--gf-accent-bg); color: var(--gf-accent-dark); }
.stat-icon.blue { background: var(--gf-info-bg); color: var(--gf-info); }

.stat-info h3 {
  font-size: var(--gf-text-xs);
  font-weight: var(--gf-weight-medium);
  color: var(--gf-neutral-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--gf-space-1);
}

.stat-info .stat-value {
  font-family: var(--gf-font-heading);
  font-size: var(--gf-text-2xl);
  font-weight: var(--gf-weight-bold);
  color: var(--gf-neutral-900);
}

.stat-info .stat-change {
  font-size: var(--gf-text-xs);
  margin-top: var(--gf-space-1);
}

.stat-change.up { color: var(--gf-success); }
.stat-change.down { color: var(--gf-error); }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--gf-space-2);
  font-family: var(--gf-font-body);
  font-size: var(--gf-text-base);
  font-weight: var(--gf-weight-semibold);
  padding: 0.75rem 1.5rem;
  border-radius: var(--gf-radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--gf-duration-normal) var(--gf-ease);
  white-space: nowrap;
  line-height: 1;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: var(--gf-text-sm);
}

.btn-primary {
  background: var(--gf-primary);
  color: #fff;
}

.btn-primary:hover { background: var(--gf-primary-dark); }
.btn-primary:disabled { background: #FFB899; cursor: not-allowed; }

.btn-secondary {
  background: transparent;
  color: var(--gf-primary);
  border: 2px solid var(--gf-primary);
}

.btn-secondary:hover {
  background: var(--gf-primary-bg);
  color: var(--gf-primary-dark);
  border-color: var(--gf-primary-dark);
}

.btn-ghost {
  background: transparent;
  color: var(--gf-neutral-500);
  padding: 0.5rem 1rem;
  font-size: var(--gf-text-sm);
  font-weight: var(--gf-weight-medium);
}

.btn-ghost:hover {
  background: var(--gf-neutral-100);
  color: var(--gf-neutral-700);
}

.btn-danger {
  background: var(--gf-error);
  color: #fff;
}

.btn-danger:hover { background: #c0392b; }

.btn-success {
  background: var(--gf-success);
  color: #fff;
}

.btn-success:hover { background: #27ae60; }

/* --- Forms --- */
.form-group {
  margin-bottom: var(--gf-space-4);
}

.form-label {
  display: block;
  font-size: var(--gf-text-sm);
  font-weight: var(--gf-weight-medium);
  color: var(--gf-neutral-700);
  margin-bottom: var(--gf-space-2);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--gf-font-body);
  font-size: var(--gf-text-base);
  color: var(--gf-neutral-800);
  background: var(--gf-bg);
  border: 1px solid var(--gf-neutral-300);
  border-radius: var(--gf-radius-md);
  transition: border-color var(--gf-duration-normal), box-shadow var(--gf-duration-normal);
  line-height: 1.5;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--gf-neutral-400);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--gf-primary);
  box-shadow: 0 0 0 3px rgba(255,107,53,0.15);
}

.form-input.error {
  border-color: var(--gf-error);
  box-shadow: 0 0 0 3px rgba(231,76,60,0.15);
}

.form-error {
  font-size: var(--gf-text-xs);
  color: var(--gf-error);
  margin-top: var(--gf-space-1);
}

.form-hint {
  font-size: var(--gf-text-xs);
  color: var(--gf-neutral-400);
  margin-top: var(--gf-space-1);
}

.form-textarea {
  resize: vertical;
  min-height: 6rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gf-space-4);
}

/* --- Badges --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: var(--gf-text-xs);
  font-weight: var(--gf-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--gf-radius-full);
}

.badge-default { background: var(--gf-neutral-100); color: var(--gf-neutral-600); }
.badge-primary { background: var(--gf-primary-bg); color: var(--gf-primary-dark); }
.badge-success { background: var(--gf-success-bg); color: #1B8A4A; }
.badge-warning { background: var(--gf-warning-bg); color: #B87A0D; }
.badge-error { background: var(--gf-error-bg); color: #C0392B; }
.badge-info { background: var(--gf-info-bg); color: #2471A3; }
.badge-accent { background: var(--gf-accent-bg); color: #B8860B; }

/* --- Tables --- */
.table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--gf-text-sm);
}

.data-table thead {
  background: var(--gf-neutral-100);
}

.data-table th {
  text-align: left;
  padding: 0.75rem 1rem;
  font-size: var(--gf-text-xs);
  font-weight: var(--gf-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--gf-neutral-600);
  white-space: nowrap;
}

.data-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--gf-neutral-200);
  color: var(--gf-neutral-700);
}

.data-table tbody tr:hover {
  background: var(--gf-primary-bg);
}

.data-table .actions {
  display: flex;
  gap: var(--gf-space-2);
}

/* --- Modal --- */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: var(--gf-z-modal-backdrop);
  align-items: center;
  justify-content: center;
  padding: var(--gf-space-4);
}

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

.modal {
  background: var(--gf-bg);
  border-radius: var(--gf-radius-xl);
  box-shadow: var(--gf-shadow-xl);
  width: 100%;
  max-width: 32rem;
  max-height: 90vh;
  overflow-y: auto;
  animation: modalIn var(--gf-duration-slow) var(--gf-ease-bounce);
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95) translateY(1rem); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--gf-space-6) var(--gf-space-6) 0;
}

.modal-header h2 {
  font-size: var(--gf-text-xl);
  font-weight: var(--gf-weight-bold);
}

.modal-close {
  width: 2rem;
  height: 2rem;
  border: none;
  background: none;
  cursor: pointer;
  border-radius: var(--gf-radius-full);
  color: var(--gf-neutral-400);
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--gf-duration-fast);
}

.modal-close:hover {
  background: var(--gf-neutral-100);
  color: var(--gf-neutral-700);
}

.modal-body {
  padding: var(--gf-space-6);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--gf-space-3);
  padding: 0 var(--gf-space-6) var(--gf-space-6);
}

/* --- Toast Notifications --- */
.toast-container {
  position: fixed;
  top: var(--gf-space-4);
  right: var(--gf-space-4);
  z-index: var(--gf-z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--gf-space-3);
  max-width: 24rem;
  width: calc(100% - 2rem);
}

.toast {
  padding: 1rem 1.5rem;
  border-radius: var(--gf-radius-md);
  box-shadow: var(--gf-shadow-lg);
  font-size: var(--gf-text-sm);
  display: flex;
  align-items: center;
  gap: var(--gf-space-3);
  animation: toastIn var(--gf-duration-slow) var(--gf-ease-bounce);
}

.toast.removing {
  animation: toastOut var(--gf-duration-normal) var(--gf-ease) forwards;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(1rem); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes toastOut {
  to { opacity: 0; transform: translateX(1rem); }
}

.toast-success { background: var(--gf-success-bg); border: 1px solid var(--gf-success); }
.toast-error { background: var(--gf-error-bg); border: 1px solid var(--gf-error); }
.toast-warning { background: var(--gf-warning-bg); border: 1px solid var(--gf-warning); }
.toast-info { background: var(--gf-info-bg); border: 1px solid var(--gf-info); }

/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: var(--gf-space-12) var(--gf-space-6);
  color: var(--gf-neutral-400);
}

.empty-state .icon {
  font-size: 3rem;
  margin-bottom: var(--gf-space-4);
}

.empty-state h3 {
  font-size: var(--gf-text-lg);
  color: var(--gf-neutral-600);
  margin-bottom: var(--gf-space-2);
}

.empty-state p {
  font-size: var(--gf-text-sm);
  margin-bottom: var(--gf-space-6);
}

/* --- Loading Spinner --- */
.spinner {
  width: 2rem;
  height: 2rem;
  border: 3px solid var(--gf-neutral-200);
  border-top-color: var(--gf-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-overlay {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--gf-space-12);
}

/* --- Tabs --- */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--gf-neutral-200);
  margin-bottom: var(--gf-space-6);
  overflow-x: auto;
}

.tab {
  padding: var(--gf-space-3) var(--gf-space-4);
  font-size: var(--gf-text-sm);
  font-weight: var(--gf-weight-medium);
  color: var(--gf-neutral-500);
  border: none;
  background: none;
  cursor: pointer;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--gf-duration-fast);
}

.tab:hover { color: var(--gf-neutral-700); }

.tab.active {
  color: var(--gf-primary);
  border-bottom-color: var(--gf-primary);
}

/* --- Search --- */
.search-box {
  position: relative;
}

.search-box .search-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gf-neutral-400);
  font-size: 1rem;
  pointer-events: none;
}

.search-box .form-input {
  padding-left: 2.5rem;
}

/* --- Toggle Switch --- */
.toggle {
  position: relative;
  display: inline-block;
  width: 2.75rem;
  height: 1.5rem;
}

.toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--gf-neutral-300);
  border-radius: var(--gf-radius-full);
  cursor: pointer;
  transition: background var(--gf-duration-normal);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 1.125rem;
  height: 1.125rem;
  left: 0.1875rem;
  bottom: 0.1875rem;
  background: #fff;
  border-radius: 50%;
  transition: transform var(--gf-duration-normal) var(--gf-ease);
}

.toggle input:checked + .toggle-slider {
  background: var(--gf-primary);
}

.toggle input:checked + .toggle-slider::before {
  transform: translateX(1.25rem);
}

/* --- Chip / Tag --- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--gf-space-1);
  padding: 0.375rem 0.75rem;
  background: var(--gf-neutral-100);
  color: var(--gf-neutral-600);
  font-size: var(--gf-text-sm);
  font-weight: var(--gf-weight-medium);
  border-radius: var(--gf-radius-full);
  border: none;
  cursor: default;
}

.chip-remove {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1rem;
  height: 1rem;
  border: none;
  background: none;
  cursor: pointer;
  color: var(--gf-neutral-400);
  font-size: 0.75rem;
  border-radius: 50%;
  transition: all var(--gf-duration-fast);
}

.chip-remove:hover {
  background: var(--gf-neutral-200);
  color: var(--gf-neutral-700);
}

/* --- Utility Classes --- */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--gf-neutral-500); }
.text-sm { font-size: var(--gf-text-sm); }
.text-xs { font-size: var(--gf-text-xs); }
.font-mono { font-family: var(--gf-font-mono); }
.mt-2 { margin-top: var(--gf-space-2); }
.mt-4 { margin-top: var(--gf-space-4); }
.mt-6 { margin-top: var(--gf-space-6); }
.mb-2 { margin-bottom: var(--gf-space-2); }
.mb-4 { margin-bottom: var(--gf-space-4); }
.mb-6 { margin-bottom: var(--gf-space-6); }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--gf-space-2); }
.gap-3 { gap: var(--gf-space-3); }
.gap-4 { gap: var(--gf-space-4); }
.hidden { display: none !important; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ==========================================
   RESPONSIVE BREAKPOINTS
   ========================================== */

/* sm: 640px+ */
@media (min-width: 640px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .form-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* md: 768px+ */
@media (min-width: 768px) {
  .page-content {
    padding: var(--gf-space-6);
  }

  .page-header h1 {
    font-size: var(--gf-text-3xl);
  }
}

/* lg: 1024px+ — sidebar always visible */
@media (min-width: 1024px) {
  .sidebar {
    transform: translateX(0);
  }

  .sidebar-overlay {
    display: none !important;
  }

  .menu-toggle {
    display: none;
  }

  .main-content {
    margin-left: var(--gf-sidebar-width);
  }

  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-content {
    padding: var(--gf-space-8);
  }
}

/* xl: 1280px+ */
@media (min-width: 1280px) {
  .page-content {
    max-width: 80rem;
  }
}