/* ═══════════════════════════════════════════════════════════════
   Common Layout & Component Styles
   ═══════════════════════════════════════════════════════════════ */
@import url('./design-tokens.css');

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

html, body {
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  color: var(--color-text-1);
  background: var(--color-bg-page);
  line-height: var(--line-height-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* === App Shell Layout === */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-width);
  background: var(--color-white);
  border-right: 1px solid var(--color-border-light);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  transition: width 0.3s ease;
}

.sidebar-logo {
  height: var(--header-height);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0 var(--space-5);
  border-bottom: 1px solid var(--color-border-light);
  flex-shrink: 0;
}

.sidebar-logo .logo-icon {
  width: 32px; height: 32px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary-6), var(--primary-4));
  display: flex; align-items: center; justify-content: center;
  color: white; font-size: 16px; font-weight: 700;
}

.sidebar-logo .logo-text {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-1);
  white-space: nowrap;
}

.sidebar-logo .logo-img {
  width: 32px;
  height: 32px;
  object-fit: contain;
  flex-shrink: 0;
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-3) var(--space-2);
  overflow-y: auto;
}

.sidebar-section-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-3);
  font-weight: var(--font-weight-medium);
  padding: var(--space-4) var(--space-3) var(--space-1);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.sidebar-nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-text-2);
  font-size: var(--font-size-md);
  cursor: pointer;
  transition: all 0.15s ease;
  margin-bottom: 2px;
  text-decoration: none;
}

.sidebar-nav-item:hover {
  background: var(--color-bg-hover);
  color: var(--color-text-1);
}

.sidebar-nav-item.active {
  background: var(--color-primary-bg);
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
}

.sidebar-nav-item .nav-icon {
  width: 18px; height: 18px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}

.sidebar-nav-item .nav-icon svg { width: 18px; height: 18px; }

.sidebar-footer {
  padding: var(--space-3);
  border-top: 1px solid var(--color-border-light);
  flex-shrink: 0;
}

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

.topbar {
  height: var(--header-height);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.topbar-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-1);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.topbar-user {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-md);
  transition: background 0.15s ease;
}

.topbar-user:hover { background: var(--color-bg-hover); }

.user-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--primary-6);
  color: white;
  display: flex; align-items: center; justify-content: center;
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
}

.user-name { font-size: var(--font-size-md); color: var(--color-text-1); }

.content-area { padding: var(--space-6); flex: 1; }

/* === Card === */
.card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
  border: 1px solid var(--color-border-light);
}

.card-header {
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-1);
}

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

/* === Stat Card === */
.stat-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  border: 1px solid var(--color-border-light);
  transition: box-shadow 0.2s ease;
}

.stat-card:hover { box-shadow: var(--shadow-2); }

.stat-card .stat-icon {
  width: 40px; height: 40px;
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--space-3);
}

.stat-card .stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-3);
  margin-bottom: var(--space-1);
}

.stat-card .stat-value {
  font-size: var(--font-size-display);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-1);
  line-height: 1.1;
}

/* === Button === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  border: none;
  transition: all 0.15s ease;
  white-space: nowrap;
  line-height: var(--line-height-normal);
}

.btn-primary {
  background: var(--color-primary);
  color: white;
}
.btn-primary:hover { background: var(--color-primary-hover); }
.btn-primary:active { background: var(--color-primary-click); }
.btn-primary:disabled { background: var(--color-primary-disabled); cursor: not-allowed; }

.btn-secondary {
  background: var(--color-white);
  color: var(--color-text-1);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover { border-color: var(--color-primary); color: var(--color-primary); }

.btn-danger {
  background: var(--color-white);
  color: var(--color-danger);
  border: 1px solid var(--color-danger);
}
.btn-danger:hover { background: var(--color-danger-bg); }

.btn-ghost {
  background: transparent;
  color: var(--color-text-2);
  padding: var(--space-1) var(--space-3);
}
.btn-ghost:hover { background: var(--color-bg-hover); color: var(--color-text-1); }

.btn-sm { padding: var(--space-1) var(--space-3); font-size: var(--font-size-sm); }
.btn-lg { padding: var(--space-3) var(--space-6); font-size: var(--font-size-lg); }

/* === Table === */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-md);
}

.data-table thead th {
  background: var(--color-bg-4);
  color: var(--color-text-2);
  font-weight: var(--font-weight-medium);
  text-align: left;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border-light);
  white-space: nowrap;
}

.data-table tbody td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text-1);
}

.data-table tbody tr:hover { background: var(--color-bg-3); }
.data-table tbody tr:last-child td { border-bottom: none; }

/* === Tag / Badge === */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  line-height: 1.6;
}

.tag-success { background: var(--success-2); color: var(--success-6); }
.tag-warning { background: var(--warning-2); color: var(--warning-6); }
.tag-danger { background: var(--danger-2); color: var(--danger-6); }
.tag-info { background: var(--primary-2); color: var(--primary-6); }
.tag-default { background: var(--color-bg-4); color: var(--color-text-3); }

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

.form-label {
  display: block;
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-1);
  margin-bottom: var(--space-2);
}

.form-label .required { color: var(--color-danger); margin-left: 2px; }

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-md);
  color: var(--color-text-1);
  background: var(--color-white);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  outline: none;
  font-family: inherit;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(22, 100, 255, 0.12);
}

.form-input::placeholder { color: var(--color-text-placeholder); }
.form-textarea { resize: vertical; min-height: 80px; }

/* === Pagination === */
.pagination {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  justify-content: flex-end;
  padding: var(--space-4) 0 0;
}

.pagination .page-info {
  font-size: var(--font-size-sm);
  color: var(--color-text-3);
  margin-right: var(--space-3);
}

.pagination .page-btn {
  min-width: 32px;
  height: 32px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: white;
  color: var(--color-text-2);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all 0.15s ease;
}

.pagination .page-btn:hover:not(:disabled) { border-color: var(--color-primary); color: var(--color-primary); }
.pagination .page-btn.active { background: var(--color-primary); color: white; border-color: var(--color-primary); }
.pagination .page-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* === Modal === */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(12, 13, 14, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.modal-overlay.show { opacity: 1; visibility: visible; }

.modal {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-5);
  width: 480px;
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  transform: translateY(-12px);
  transition: transform 0.2s ease;
}

.modal-overlay.show .modal { transform: translateY(0); }

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

.modal-title { font-size: var(--font-size-xl); font-weight: var(--font-weight-semibold); }
.modal-close { cursor: pointer; color: var(--color-text-3); font-size: 20px; background: none; border: none; }
.modal-close:hover { color: var(--color-text-1); }

.modal-body { padding: var(--space-6); overflow-y: auto; flex: 1; }
.modal-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border-light);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  flex-shrink: 0;
}

/* === Toast === */
.toast-container {
  position: fixed;
  top: var(--space-6);
  right: var(--space-6);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.toast {
  background: white;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-3);
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-md);
  border-left: 4px solid var(--color-primary);
  min-width: 280px;
  animation: toast-slide-in 0.3s ease;
}

.toast.success { border-left-color: var(--color-success); }
.toast.error { border-left-color: var(--color-danger); }
.toast.warning { border-left-color: var(--color-warning); }

@keyframes toast-slide-in {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* === Empty State === */
.empty-state {
  text-align: center;
  padding: var(--space-12) var(--space-6);
  color: var(--color-text-3);
}

.empty-state .empty-icon {
  width: 56px; height: 56px;
  margin: 0 auto var(--space-4);
  color: var(--color-text-4);
}

.empty-state .empty-text { font-size: var(--font-size-md); }

/* === Loading === */
.loading-spinner {
  display: inline-block;
  width: 16px; height: 16px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

.table-loading {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--space-10);
}

/* === Utility === */
.text-primary { color: var(--color-primary); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-danger { color: var(--color-danger); }
.text-muted { color: var(--color-text-3); }

.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.w-full { width: 100%; }
.hidden { display: none !important; }

.grid { display: grid; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

/* === Search Bar === */
.search-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}

.search-bar .form-input { width: auto; min-width: 200px; }

/* === Switch Toggle === */
.switch {
  position: relative;
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  user-select: none;
}

.switch input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.switch-track {
  position: relative;
  width: 42px;
  height: 22px;
  border-radius: 11px;
  background: var(--color-bg-4, #C9CDD4);
  transition: background 0.25s ease;
  flex-shrink: 0;
}

.switch-track::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
  transition: transform 0.25s ease;
}

.switch input:checked + .switch-track {
  background: var(--color-primary, #1664FF);
}

.switch input:checked + .switch-track::after {
  transform: translateX(20px);
}

.switch input:disabled + .switch-track {
  opacity: 0.5;
  cursor: not-allowed;
}

.switch-label {
  margin-left: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-2);
  white-space: nowrap;
}

/* === Responsive === */
@media (max-width: 768px) {
  .sidebar { width: var(--sidebar-collapsed-width); }
  .sidebar-logo .logo-text { display: none; }
  .sidebar-nav-item span:not(.nav-icon) { display: none; }
  .sidebar-section-label { display: none; }
  .main-area { margin-left: var(--sidebar-collapsed-width); }
  .grid-cols-3, .grid-cols-4 { grid-template-columns: repeat(2, 1fr); }
}