/* ================================================================
   Mandra Admin Dashboard — Design System
   Dark glassmorphism · Inter font · Responsive
   ================================================================ */

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

:root {
  /* Palette */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-glass: rgba(255, 255, 255, 0.06);
  --bg-glass-hover: rgba(255, 255, 255, 0.10);
  --bg-input: rgba(255, 255, 255, 0.07);
  --bg-overlay: rgba(0, 0, 0, 0.65);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(139, 92, 246, 0.5);

  --text-primary: #f0f0f5;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;

  --accent: #8b5cf6;
  --accent-hover: #7c3aed;
  --accent-glow: rgba(139, 92, 246, 0.25);
  --accent-gradient: linear-gradient(135deg, #8b5cf6, #06b6d4);

  --danger: #ef4444;
  --danger-hover: #dc2626;
  --danger-glow: rgba(239, 68, 68, 0.2);

  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.12);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.12);

  /* Typography */
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --fs-xs: 0.75rem;
  --fs-sm: 0.8125rem;
  --fs-base: 0.9375rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.5rem;
  --fs-2xl: 2rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;

  /* Radii */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 20px var(--accent-glow);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Subtle grid pattern background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 20%, rgba(139, 92, 246, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(6, 182, 212, 0.04) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

a { color: var(--accent); text-decoration: none; }

/* ---------- Utility ---------- */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

.hidden { display: none !important; }

/* ---------- Login Screen ---------- */
#login-screen {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: var(--space-4);
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--bg-glass);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-10);
  box-shadow: var(--shadow-lg);
  animation: fadeSlideUp 0.6s var(--transition-base) both;
}

.login-card .brand {
  text-align: center;
  margin-bottom: var(--space-8);
}

.login-card .brand h1 {
  font-size: var(--fs-2xl);
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.login-card .brand p {
  color: var(--text-secondary);
  font-size: var(--fs-sm);
  margin-top: var(--space-1);
}

/* ---------- Forms ---------- */
.form-group {
  margin-bottom: var(--space-5);
}

.form-group label {
  display: block;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.form-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: var(--fs-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-input::placeholder {
  color: var(--text-muted);
}

select.form-input {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%239ca3af' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

select.form-input option {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

textarea.form-input {
  resize: vertical;
  min-height: 90px;
}

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

.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
}

.form-check input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
}

.form-error {
  background: var(--danger-glow);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  margin-bottom: var(--space-5);
  animation: fadeIn 0.3s ease;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font);
  font-size: var(--fs-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  outline: none;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-glass-hover);
  border-color: rgba(255, 255, 255, 0.15);
}

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

.btn-danger:hover:not(:disabled) {
  background: var(--danger-hover);
  box-shadow: 0 0 16px var(--danger-glow);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: var(--space-2) var(--space-3);
}

.btn-ghost:hover {
  color: var(--text-primary);
  background: var(--bg-glass);
}

.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--fs-xs);
}

.btn-full {
  width: 100%;
  padding: var(--space-4);
  font-size: var(--fs-base);
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-sm);
  font-size: var(--fs-lg);
}

/* ---------- Dashboard Layout ---------- */
#dashboard-screen {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 100;
}

.topbar-brand {
  font-size: var(--fs-lg);
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.topbar-user {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  margin-right: var(--space-2);
}

/* Main content */
.main-content {
  flex: 1;
  padding: var(--space-6);
  max-width: 1280px;
  margin: 0 auto;
  width: 100%;
}

/* ---------- Toolbar ---------- */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.toolbar-title {
  font-size: var(--fs-xl);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.toolbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.search-box {
  position: relative;
}

.search-box .form-input {
  padding-left: 2.5rem;
  width: 240px;
}

.search-box .search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  font-size: var(--fs-sm);
}

.filter-select {
  width: 150px;
}

/* ---------- Stats Row ---------- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.stat-card {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: all var(--transition-base);
}

.stat-card:hover {
  background: var(--bg-glass-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-label {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
}

.stat-value {
  font-size: var(--fs-2xl);
  font-weight: 700;
  margin-top: var(--space-1);
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---------- Product Table ---------- */
.table-wrapper {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.product-table {
  width: 100%;
  border-collapse: collapse;
}

.product-table thead {
  background: rgba(255, 255, 255, 0.03);
}

.product-table th {
  padding: var(--space-4);
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

.product-table td {
  padding: var(--space-4);
  font-size: var(--fs-sm);
  border-bottom: 1px solid var(--border-subtle);
  vertical-align: middle;
}

.product-table tbody tr {
  transition: background var(--transition-fast);
}

.product-table tbody tr:hover {
  background: var(--bg-glass-hover);
}

.product-table tbody tr:last-child td {
  border-bottom: none;
}

.product-thumb {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  border: 1px solid var(--border-subtle);
  background: var(--bg-secondary);
}

.product-thumb-placeholder {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

.product-title-cell {
  font-weight: 500;
  color: var(--text-primary);
}

.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: capitalize;
}

.badge-stock {
  background: var(--success-bg);
  color: var(--success);
}

.badge-oos {
  background: var(--danger-glow);
  color: #fca5a5;
}

.badge-category {
  background: rgba(139, 92, 246, 0.12);
  color: #c4b5fd;
}

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

/* ---------- Mobile Product Cards (hidden on desktop) ---------- */
.product-cards {
  display: none;
}

.product-card {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-4);
  transition: all var(--transition-base);
  animation: fadeSlideUp 0.35s ease both;
}

.product-card:hover {
  background: var(--bg-glass-hover);
  box-shadow: var(--shadow-md);
}

.product-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.product-card-header img {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  object-fit: cover;
  border: 1px solid var(--border-subtle);
}

.product-card-info {
  flex: 1;
  min-width: 0;
}

.product-card-title {
  font-weight: 600;
  font-size: var(--fs-base);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.product-card-price {
  font-size: var(--fs-sm);
  color: var(--accent);
  font-weight: 600;
}

.product-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.product-card-actions {
  display: flex;
  gap: var(--space-2);
  justify-content: flex-end;
}

/* ---------- Pagination ---------- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-5);
  border-top: 1px solid var(--border-subtle);
}

.pagination-info {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  margin: 0 var(--space-4);
}

/* ---------- Modal ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  animation: fadeIn 0.2s ease;
}

.modal {
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  animation: modalSlideUp 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border-subtle);
}

.modal-header h2 {
  font-size: var(--fs-lg);
  font-weight: 700;
}

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

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border-subtle);
}

/* ---------- Image Upload ---------- */
.image-upload-area {
  border: 2px dashed var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-top: var(--space-4);
}

.image-upload-area:hover {
  border-color: var(--accent);
  background: rgba(139, 92, 246, 0.04);
}

.image-upload-area p {
  color: var(--text-secondary);
  font-size: var(--fs-sm);
}

.image-upload-area .upload-icon {
  font-size: 2rem;
  margin-bottom: var(--space-2);
  color: var(--text-muted);
}

.image-preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.image-preview-item {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 1;
}

.image-preview-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-preview-item .remove-image {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 22px;
  height: 22px;
  background: rgba(0, 0, 0, 0.7);
  border: none;
  border-radius: 50%;
  color: #fff;
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.image-preview-item:hover .remove-image {
  opacity: 1;
}

/* ---------- Confirm Dialog ---------- */
.confirm-text {
  font-size: var(--fs-base);
  color: var(--text-secondary);
  line-height: 1.7;
}

.confirm-text strong {
  color: var(--text-primary);
}

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

.empty-state .empty-icon {
  font-size: 3rem;
  margin-bottom: var(--space-4);
  opacity: 0.4;
}

.empty-state p {
  font-size: var(--fs-base);
  margin-bottom: var(--space-6);
}

/* ---------- Loading Spinner ---------- */
.spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.2);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.page-loader {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
}

.page-loader .spinner {
  width: 40px;
  height: 40px;
  border-width: 3px;
}

/* ---------- Toast ---------- */
.toast-container {
  position: fixed;
  top: var(--space-6);
  right: var(--space-6);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.toast {
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  font-weight: 500;
  box-shadow: var(--shadow-md);
  animation: slideInRight 0.35s ease, fadeOut 0.4s ease 2.6s forwards;
  max-width: 360px;
}

.toast-success {
  background: #065f46;
  color: #a7f3d0;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.toast-error {
  background: #7f1d1d;
  color: #fca5a5;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

/* ---------- Animations ---------- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

@keyframes fadeSlideUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes modalSlideUp {
  from {
    opacity: 0;
    transform: translateY(24px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ================================================================
   Responsive
   ================================================================ */

/* Tablet */
@media (max-width: 1024px) {
  .main-content {
    padding: var(--space-4);
  }

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

  .search-box .form-input {
    width: 200px;
  }
}

/* Mobile */
@media (max-width: 768px) {
  .topbar {
    padding: var(--space-3) var(--space-4);
  }

  .topbar-user {
    display: none;
  }

  .main-content {
    padding: var(--space-3);
  }

  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .toolbar-actions {
    flex-direction: column;
  }

  .search-box .form-input {
    width: 100%;
  }

  .filter-select {
    width: 100%;
  }

  .stats-row {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
  }

  .stat-card {
    padding: var(--space-4);
  }

  .stat-value {
    font-size: var(--fs-xl);
  }

  /* Hide table, show cards */
  .table-wrapper {
    display: none;
  }

  .product-cards {
    display: block;
  }

  .pagination {
    padding: var(--space-4);
  }

  .pagination-info {
    margin: 0 var(--space-2);
    font-size: var(--fs-xs);
  }

  /* Modal full width on mobile */
  .modal {
    max-width: 100%;
    max-height: 100vh;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    align-self: flex-end;
  }

  .modal-body {
    padding: var(--space-4);
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .toast-container {
    top: auto;
    bottom: var(--space-4);
    right: var(--space-4);
    left: var(--space-4);
  }

  .toast {
    max-width: 100%;
  }

  .login-card {
    padding: var(--space-6);
  }
}

@media (max-width: 480px) {
  .stats-row {
    grid-template-columns: 1fr;
  }

  .product-card-actions {
    justify-content: stretch;
  }

  .product-card-actions .btn {
    flex: 1;
  }
}