/**
 * Bridge AI OS - Component Styles
 * Reusable UI components
 */

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  line-height: 1;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

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

.btn svg {
  width: 16px;
  height: 16px;
}

/* Primary Button */
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-600));
  color: white;
  box-shadow: 0 2px 4px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--color-primary-400), var(--color-primary-500));
  box-shadow: 0 4px 8px rgba(99, 102, 241, 0.4);
  transform: translateY(-1px);
}

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

/* Secondary Button */
.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-hover);
  border-color: var(--border-color-light);
}

/* Ghost Button */
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* Danger Button */
.btn-danger {
  background: var(--color-error-600);
  color: white;
}

.btn-danger:hover:not(:disabled) {
  background: var(--color-error-500);
}

/* Success Button */
.btn-success {
  background: var(--color-success-600);
  color: white;
}

.btn-success:hover:not(:disabled) {
  background: var(--color-success-500);
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
}

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

.btn-icon {
  padding: var(--space-2);
}

/* ============================================
   FORMS
   ============================================ */

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

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

.form-label.required::after {
  content: '*';
  color: var(--color-error-500);
  margin-left: var(--space-1);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-tertiary);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--color-error-500);
}

.form-input.error:focus,
.form-select.error:focus,
.form-textarea.error:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-textarea {
  min-height: 100px;
  resize: vertical;
}

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

.form-error {
  font-size: var(--text-xs);
  color: var(--color-error-500);
  margin-top: var(--space-1);
}

/* Checkbox & Radio */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.form-check-input {
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary-500);
  cursor: pointer;
}

.form-check-label {
  font-size: var(--text-sm);
  color: var(--text-primary);
  cursor: pointer;
}

/* Toggle Switch */
.toggle {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

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

.toggle-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  transition: var(--transition-fast);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  height: 18px;
  width: 18px;
  left: 2px;
  bottom: 2px;
  background: var(--text-tertiary);
  border-radius: 50%;
  transition: var(--transition-fast);
}

.toggle-input:checked + .toggle-slider {
  background: var(--color-primary-500);
  border-color: var(--color-primary-500);
}

.toggle-input:checked + .toggle-slider::before {
  transform: translateX(20px);
  background: white;
}

.toggle-input:focus + .toggle-slider {
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* ============================================
   CARDS
   ============================================ */

.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.card-header {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin: 0;
}

.card-body {
  padding: var(--space-5);
}

.card-footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--border-color);
  background: var(--bg-tertiary);
}

/* ============================================
   STATS CARDS
   ============================================ */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.stat-card:hover {
  border-color: var(--border-color-light);
  box-shadow: var(--shadow-md);
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-icon svg {
  width: 24px;
  height: 24px;
}

.stat-icon-primary {
  background: rgba(99, 102, 241, 0.1);
  color: var(--color-primary-500);
}

.stat-icon-success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-success-500);
}

.stat-icon-warning {
  background: rgba(245, 158, 11, 0.1);
  color: var(--color-warning-500);
}

.stat-icon-info {
  background: rgba(59, 130, 246, 0.1);
  color: var(--color-info-500);
}

.stat-content {
  flex: 1;
  min-width: 0;
}

.stat-value {
  display: block;
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  line-height: 1.2;
}

.stat-label {
  display: block;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-top: var(--space-1);
}

.stat-trend {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
}

.stat-trend svg {
  width: 14px;
  height: 14px;
}

.stat-trend-up {
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-success-500);
}

.stat-trend-down {
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-error-500);
}

.stat-trend-neutral {
  background: var(--bg-tertiary);
  color: var(--text-tertiary);
}

/* ============================================
   TABLES
   ============================================ */

.table-container {
  overflow-x: auto;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
}

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

.table th,
.table td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.table th {
  background: var(--bg-tertiary);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  white-space: nowrap;
}

.table td {
  color: var(--text-primary);
}

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

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

/* ============================================
   BADGES
   ============================================ */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.badge-primary {
  background: rgba(99, 102, 241, 0.1);
  color: var(--color-primary-400);
}

.badge-success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-success-500);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.1);
  color: var(--color-warning-500);
}

.badge-error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-error-500);
}

.badge-info {
  background: rgba(59, 130, 246, 0.1);
  color: var(--color-info-500);
}

.badge-neutral {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
}

/* ============================================
   MODALS
   ============================================ */

.modal-container {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal-container.open {
  opacity: 1;
  visibility: visible;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
}

.modal {
  position: relative;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform: scale(0.95);
  transition: transform var(--transition-normal);
}

.modal-container.open .modal {
  transform: scale(1);
}

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

.modal-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--space-1);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.modal-close:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.modal-close svg {
  width: 20px;
  height: 20px;
}

.modal-body {
  padding: var(--space-5);
  overflow-y: auto;
}

.modal-footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
}

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */

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

.toast {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-4);
  min-width: 300px;
  max-width: 400px;
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  box-shadow: var(--shadow-xl);
  animation: slideIn var(--transition-normal);
}

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

.toast-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
}

.toast-success .toast-icon { color: var(--color-success-500); }
.toast-error .toast-icon { color: var(--color-error-500); }
.toast-warning .toast-icon { color: var(--color-warning-500); }
.toast-info .toast-icon { color: var(--color-info-500); }

.toast-content {
  flex: 1;
  min-width: 0;
}

.toast-title {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.toast-message {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.toast-close {
  background: none;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: var(--space-1);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast);
}

.toast-close:hover {
  color: var(--text-primary);
}

.toast-close svg {
  width: 16px;
  height: 16px;
}

/* ============================================
   TABS
   ============================================ */

.tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: var(--space-4);
}

.tab {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast);
  margin-bottom: -1px;
}

.tab:hover {
  color: var(--text-primary);
}

.tab.active {
  color: var(--color-primary-500);
  border-bottom-color: var(--color-primary-500);
}

/* ============================================
   PROGRESS
   ============================================ */

.progress {
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary-500), var(--color-secondary-500));
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

.progress-bar.success {
  background: var(--color-success-500);
}

.progress-bar.warning {
  background: var(--color-warning-500);
}

.progress-bar.error {
  background: var(--color-error-500);
}

/* ============================================
   SKELETON LOADING
   ============================================ */

.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-tertiary) 25%,
    var(--bg-hover) 50%,
    var(--bg-tertiary) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton-text {
  height: 16px;
  margin-bottom: var(--space-2);
}

.skeleton-text:last-child {
  width: 60%;
}

.skeleton-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

.skeleton-card {
  height: 120px;
}

/* ============================================
   EMPTY STATE
   ============================================ */

.empty-state {
  text-align: center;
  padding: var(--space-12) var(--space-6);
}

.empty-state-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-4);
  color: var(--text-tertiary);
}

.empty-state-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.empty-state-description {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
}

/* ============================================
   DROPDOWN
   ============================================ */

.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 180px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--space-2);
  z-index: var(--z-dropdown);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
}

.dropdown.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(4px);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-primary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.dropdown-item:hover {
  background: var(--bg-hover);
}

.dropdown-item svg {
  width: 16px;
  height: 16px;
  color: var(--text-secondary);
}

.dropdown-divider {
  height: 1px;
  background: var(--border-color);
  margin: var(--space-2) 0;
}

/* ============================================
   TOOLTIP
   ============================================ */

.tooltip {
  position: relative;
}

.tooltip::before,
.tooltip::after {
  position: absolute;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-fast), visibility var(--transition-fast);
  z-index: var(--z-tooltip);
}

.tooltip::before {
  content: attr(data-tooltip);
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-2) var(--space-3);
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: var(--text-primary);
  white-space: nowrap;
  margin-bottom: var(--space-2);
  box-shadow: var(--shadow-md);
}

.tooltip::after {
  content: '';
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--bg-elevated);
  margin-bottom: calc(var(--space-2) - 6px);
}

.tooltip:hover::before,
.tooltip:hover::after {
  opacity: 1;
  visibility: visible;
}

/* ============================================
   AVATAR
   ============================================ */

.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary-500), var(--color-secondary-500));
  color: white;
  font-weight: var(--font-semibold);
  flex-shrink: 0;
}

.avatar-xs { width: 24px; height: 24px; font-size: var(--text-xs); }
.avatar-sm { width: 32px; height: 32px; font-size: var(--text-xs); }
.avatar-md { width: 40px; height: 40px; font-size: var(--text-sm); }
.avatar-lg { width: 48px; height: 48px; font-size: var(--text-base); }
.avatar-xl { width: 64px; height: 64px; font-size: var(--text-lg); }

.avatar-group {
  display: flex;
}

.avatar-group .avatar {
  border: 2px solid var(--bg-primary);
  margin-left: -8px;
}

.avatar-group .avatar:first-child {
  margin-left: 0;
}

/* ============================================
   ALERTS
   ============================================ */

.alert {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.alert-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  margin-bottom: var(--space-1);
}

.alert-message {
  font-size: var(--text-sm);
}

.alert-info {
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.alert-info .alert-icon { color: var(--color-info-500); }
.alert-info .alert-title { color: var(--color-info-500); }
.alert-info .alert-message { color: var(--color-info-600); }

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.alert-success .alert-icon { color: var(--color-success-500); }
.alert-success .alert-title { color: var(--color-success-500); }
.alert-success .alert-message { color: var(--color-success-600); }

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.alert-warning .alert-icon { color: var(--color-warning-500); }
.alert-warning .alert-title { color: var(--color-warning-500); }
.alert-warning .alert-message { color: var(--color-warning-600); }

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.alert-error .alert-icon { color: var(--color-error-500); }
.alert-error .alert-title { color: var(--color-error-500); }
.alert-error .alert-message { color: var(--color-error-600); }