/* OT Reliability SaaS - Main Stylesheet */
:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #dbeafe;
  --secondary: #64748b;
  --secondary-hover: #475569;
  --success: #10b981;
  --success-light: #d1fae5;
  --warning: #f59e0b;
  --warning-light: #fef3c7;
  --danger: #ef4444;
  --danger-light: #fee2e2;
  --background: #f8fafc;
  --surface: #ffffff;
  --surface-hover: #f1f5f9;
  --border: #e2e8f0;
  --border-dark: #cbd5e1;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --radius: 8px;
  --radius-sm: 6px;
  --radius-lg: 12px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--background);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
}

h1 { font-size: 1.875rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

p { color: var(--text-secondary); }

/* Links */
a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover { color: var(--primary-hover); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  white-space: nowrap;
}

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

.btn-primary {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

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

.btn-secondary {
  background: var(--surface);
  color: var(--text-primary);
  border-color: var(--border);
}

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

.btn-danger {
  background: var(--danger);
  color: white;
  border-color: var(--danger);
}

.btn-danger:hover:not(:disabled) {
  background: #dc2626;
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}

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

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 12px 24px;
  font-size: 1rem;
}

.btn-icon {
  padding: 8px;
  width: 36px;
  height: 36px;
}

/* Forms */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 10px 14px;
  font-size: 0.9375rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text-primary);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

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

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-error {
  color: var(--danger);
  font-size: 0.8125rem;
  margin-top: 4px;
}

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.card-header h3 {
  font-size: 1rem;
  font-weight: 600;
}

.card-body {
  padding: 20px;
}

.card-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
}

/* Auth Pages */
.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: linear-gradient(135deg, #1e3a5f 0%, #0f172a 100%);
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.auth-header {
  padding: 32px 32px 24px;
  text-align: center;
  background: linear-gradient(135deg, var(--primary) 0%, #1d4ed8 100%);
  color: white;
}

.auth-header h1 {
  color: white;
  font-size: 1.5rem;
  margin-bottom: 4px;
}

.auth-header p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.875rem;
}

.auth-logo {
  width: 64px;
  height: 64px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 1.75rem;
}

.auth-body {
  padding: 32px;
}

.auth-footer {
  padding: 20px 32px;
  text-align: center;
  background: var(--background);
  border-top: 1px solid var(--border);
}

.auth-footer p {
  font-size: 0.875rem;
}

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

.sidebar {
  width: 260px;
  background: #0f172a;
  color: white;
  display: flex;
  flex-direction: column;
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  z-index: 100;
}

.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: white;
  font-weight: 600;
  font-size: 1.125rem;
}

.sidebar-logo-icon {
  width: 36px;
  height: 36px;
  background: var(--primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  overflow-y: auto;
}

.nav-section {
  margin-bottom: 24px;
}

.nav-section-title {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.4);
  padding: 0 12px;
  margin-bottom: 8px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius);
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.08);
  color: white;
}

.nav-item.active {
  background: var(--primary);
  color: white;
}

.nav-item svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px;
  border-radius: var(--radius);
  transition: background 0.2s;
}

.user-info:hover {
  background: rgba(255, 255, 255, 0.08);
}

.user-avatar {
  width: 36px;
  height: 36px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.875rem;
}

.user-details {
  flex: 1;
  min-width: 0;
}

.user-name {
  font-size: 0.875rem;
  font-weight: 500;
  color: white;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-email {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.5);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Main Content */
.main-content {
  flex: 1;
  margin-left: 260px;
  display: flex;
  flex-direction: column;
}

.main-header {
  padding: 16px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.main-header h2 {
  font-size: 1.25rem;
}

.workspace-selector {
  display: flex;
  align-items: center;
  gap: 8px;
}

.workspace-select {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  font-size: 0.875rem;
  min-width: 200px;
}

.main-body {
  flex: 1;
  padding: 24px;
  overflow-y: auto;
}

/* Panels Grid */
.panels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 24px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  max-height: 600px;
}

.panel-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.panel-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}

.panel-title svg {
  width: 20px;
  height: 20px;
  color: var(--primary);
}

.panel-body {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
}

.panel-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

/* Documents List */
.docs-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.doc-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--background);
  border-radius: var(--radius);
  transition: background 0.2s;
}

.doc-item:hover {
  background: var(--surface-hover);
}

.doc-icon {
  width: 40px;
  height: 40px;
  background: var(--primary-light);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}

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

.doc-name {
  font-weight: 500;
  font-size: 0.875rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.doc-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Tasks */
.tasks-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.task-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px;
  background: var(--background);
  border-radius: var(--radius);
  transition: background 0.2s;
}

.task-item:hover {
  background: var(--surface-hover);
}

.task-checkbox {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-dark);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
  flex-shrink: 0;
  margin-top: 2px;
}

.task-checkbox:hover {
  border-color: var(--primary);
}

.task-checkbox.checked {
  background: var(--success);
  border-color: var(--success);
}

.task-content {
  flex: 1;
}

.task-title {
  font-weight: 500;
  font-size: 0.875rem;
}

.task-item.completed .task-title {
  text-decoration: line-through;
  color: var(--text-muted);
}

.task-description {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.task-meta {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

.task-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  font-size: 0.6875rem;
  font-weight: 500;
  border-radius: 9999px;
  text-transform: uppercase;
}

.task-badge.high {
  background: var(--danger-light);
  color: var(--danger);
}

.task-badge.medium {
  background: var(--warning-light);
  color: var(--warning);
}

.task-badge.low {
  background: var(--success-light);
  color: var(--success);
}

/* AI Response */
.ai-response {
  background: var(--background);
  border-radius: var(--radius);
  padding: 16px;
  font-size: 0.875rem;
  line-height: 1.7;
  white-space: pre-wrap;
}

.ai-response h4 {
  font-size: 0.9375rem;
  margin-top: 16px;
  margin-bottom: 8px;
  color: var(--primary);
}

.ai-response h4:first-child {
  margin-top: 0;
}

.citation {
  display: inline;
  background: var(--primary-light);
  color: var(--primary);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: help;
}

/* Sources Panel */
.sources-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.sources-title {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.source-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 8px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
}

.source-id {
  font-weight: 600;
  color: var(--primary);
  white-space: nowrap;
}

.source-text {
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Loading States */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Empty State */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
}

.empty-state svg {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state h4 {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.empty-state p {
  font-size: 0.875rem;
}

/* Alerts */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 0.875rem;
  margin-bottom: 16px;
}

.alert-error {
  background: var(--danger-light);
  color: var(--danger);
  border: 1px solid var(--danger);
}

.alert-success {
  background: var(--success-light);
  color: #059669;
  border: 1px solid var(--success);
}

.alert-warning {
  background: var(--warning-light);
  color: #d97706;
  border: 1px solid var(--warning);
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s;
}

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

.modal {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow: hidden;
  transform: scale(0.95);
  transition: transform 0.2s;
}

.modal-overlay.active .modal {
  transform: scale(1);
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  font-size: 1.125rem;
}

.modal-close {
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  border-radius: var(--radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: all 0.2s;
}

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

.modal-body {
  padding: 24px;
  overflow-y: auto;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}

.tab {
  padding: 10px 16px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all 0.2s;
}

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

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

/* File Upload */
.file-upload-area {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
}

.file-upload-area:hover,
.file-upload-area.dragover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.file-upload-area svg {
  width: 40px;
  height: 40px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.file-upload-area p {
  font-size: 0.875rem;
}

.file-upload-area span {
  color: var(--primary);
  font-weight: 500;
}

/* Audit Log */
.audit-table {
  width: 100%;
  border-collapse: collapse;
}

.audit-table th,
.audit-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
}

.audit-table th {
  background: var(--background);
  font-weight: 600;
  color: var(--text-secondary);
}

.audit-table tr:hover td {
  background: var(--surface-hover);
}

.audit-event {
  display: inline-flex;
  padding: 2px 8px;
  background: var(--background);
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
}

/* Exports */
.exports-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.export-card {
  padding: 20px;
  background: var(--background);
  border-radius: var(--radius);
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  border: 1px solid transparent;
}

.export-card:hover {
  background: var(--surface);
  border-color: var(--border);
  box-shadow: var(--shadow);
}

.export-card svg {
  width: 32px;
  height: 32px;
  color: var(--primary);
  margin-bottom: 12px;
}

.export-card h4 {
  font-size: 0.9375rem;
  margin-bottom: 4px;
}

.export-card p {
  font-size: 0.8125rem;
}

/* Utility Classes */
.hidden { display: none !important; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-4 { gap: 16px; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-muted { color: var(--text-muted); }
.font-medium { font-weight: 500; }
.w-full { width: 100%; }

/* Responsive */
@media (max-width: 1024px) {
  .panels-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s;
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .panel {
    max-height: none;
  }
}