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

:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --danger: #ef4444;
  --success: #22c55e;
  --radius: 8px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.hidden { display: none !important; }

/* Login */
.screen { min-height: 100vh; }

#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-card {
  background: var(--card-bg);
  padding: 2.5rem;
  border-radius: var(--radius);
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
  width: 100%;
  max-width: 380px;
}

.login-card h1 {
  text-align: center;
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

.login-card input {
  width: 100%;
  padding: 0.75rem;
  margin-bottom: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
}

.login-card button {
  width: 100%;
  padding: 0.75rem;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  cursor: pointer;
}

.login-card button:hover { background: var(--primary-hover); }
.error { color: var(--danger); margin-top: 0.75rem; font-size: 0.9rem; }

/* Header */
header {
  background: var(--card-bg);
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  gap: 2rem;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

header h1 { font-size: 1.25rem; }
header nav { display: flex; gap: 0.25rem; flex: 1; }

.nav-btn {
  padding: 0.5rem 1rem;
  background: none;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text-muted);
}

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

.nav-btn:hover:not(.active) { background: var(--bg); }

#logout-btn {
  padding: 0.5rem 1rem;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--text-muted);
}

#logout-btn:hover { border-color: var(--danger); color: var(--danger); }

/* Tabs */
.tab-content { padding: 2rem; max-width: 1200px; margin: 0 auto; }

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
}

.stat-card {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: var(--radius);
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
  text-align: center;
}

.stat-value {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
}

.stat-label {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Conversations */
.conversations-header {
  margin-bottom: 1rem;
  display: flex;
  gap: 1rem;
  align-items: center;
}

table {
  width: 100%;
  background: var(--card-bg);
  border-radius: var(--radius);
  border-collapse: collapse;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

th, td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th { font-size: 0.8rem; text-transform: uppercase; color: var(--text-muted); }
td { font-size: 0.9rem; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--bg); }

td button {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
  cursor: pointer;
  margin-right: 0.25rem;
}

td button:hover { border-color: var(--primary); color: var(--primary); }

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-top: 1rem;
}

.pagination button {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
  cursor: pointer;
  font-size: 0.85rem;
}

.pagination button:disabled { opacity: 0.4; cursor: default; }

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-content {
  background: var(--card-bg);
  border-radius: var(--radius);
  width: 90%;
  max-width: 700px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
}

.modal-header {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.modal-header h2 { font-size: 1rem; }
.modal-actions { display: flex; gap: 0.5rem; }

.modal-actions button {
  padding: 0.4rem 0.75rem;
  font-size: 0.8rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
  cursor: pointer;
}

.modal-actions button:hover { border-color: var(--primary); color: var(--primary); }

.modal-messages {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 1.5rem;
}

.msg {
  margin-bottom: 0.75rem;
  padding: 0.75rem;
  border-radius: var(--radius);
  max-width: 85%;
}

.msg.user {
  background: var(--primary);
  color: white;
  margin-left: auto;
}

.msg.assistant {
  background: var(--bg);
}

.msg-meta {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.msg.user .msg-meta { color: rgba(255,255,255,0.7); }

/* Settings */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.35rem;
  font-weight: 600;
  font-size: 0.9rem;
}

.form-group input[type="text"],
.form-group textarea,
.form-group select {
  width: 100%;
  max-width: 500px;
  padding: 0.65rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-family: inherit;
}

.form-group input[type="color"] {
  width: 60px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
}

#settings-form button[type="submit"] {
  padding: 0.65rem 1.5rem;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
  cursor: pointer;
}

#settings-form button[type="submit"]:hover { background: var(--primary-hover); }
.status { color: var(--success); margin-top: 0.75rem; font-size: 0.9rem; }

/* Embed */
#tab-embed h2 { margin-bottom: 0.5rem; }
#tab-embed h3 { margin-top: 1.5rem; margin-bottom: 0.35rem; }
#tab-embed p { color: var(--text-muted); margin-bottom: 0.75rem; }

.code-block {
  position: relative;
  background: #1e293b;
  color: #e2e8f0;
  padding: 1.25rem;
  border-radius: var(--radius);
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.85rem;
  overflow-x: auto;
}

.code-block pre { white-space: pre-wrap; word-break: break-all; }

#copy-embed-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  padding: 0.35rem 0.75rem;
  background: rgba(255,255,255,0.1);
  color: white;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.75rem;
}

#copy-embed-btn:hover { background: rgba(255,255,255,0.2); }

/* Customers */
.customers-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.customers-header h2 { margin: 0; }

.customers-controls {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.customers-controls select {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  min-width: 240px;
  background: var(--card-bg);
}

#customer-form-section {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: var(--radius);
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

#customer-form-section h3 {
  margin-bottom: 1rem;
}

#customer-form-section .form-group input[type="text"],
#customer-form-section .form-group textarea,
#customer-form-section .form-group select {
  max-width: 100%;
}

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

.form-hint {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

/* Buttons */
.btn-primary {
  padding: 0.55rem 1.25rem;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-size: 0.9rem;
  cursor: pointer;
}

.btn-primary:hover { background: var(--primary-hover); }
.btn-primary:disabled { opacity: 0.5; cursor: default; }

.btn-secondary {
  padding: 0.55rem 1.25rem;
  background: var(--card-bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  cursor: pointer;
}

.btn-secondary:hover { border-color: var(--text-muted); }

.btn-danger {
  padding: 0.55rem 1.25rem;
  background: var(--danger);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-size: 0.9rem;
  cursor: pointer;
}

.btn-danger:hover { background: #dc2626; }

.btn-sm {
  padding: 0.3rem 0.65rem;
  font-size: 0.8rem;
}

/* Training blocks */
.training-suggestions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.suggestion-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.suggestion-chip {
  padding: 0.3rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.8rem;
  cursor: pointer;
  color: var(--text);
}

.suggestion-chip:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.training-block {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 0.75rem;
}

.training-block-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.training-block-header .tb-title {
  flex: 1;
  padding: 0.45rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
}

.training-block .tb-content {
  width: 100%;
  padding: 0.65rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-family: inherit;
  resize: vertical;
}

/* Crawl */
.crawl-controls {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 0.5rem;
}

.crawl-controls input {
  flex: 1;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
}

/* Customer form actions */
.customer-form-actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  margin-top: 1.5rem;
}

/* Portal users section */
.portal-user-form {
  background: var(--bg);
  padding: 1.25rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.portal-user-form h4 {
  margin: 0 0 0.25rem 0;
  font-size: 1rem;
  color: var(--text);
}

.portal-user-form .form-group { margin-bottom: 0.75rem; }

.required { color: var(--danger); }
.form-hint-inline { font-weight: 400; color: var(--text-muted); font-size: 0.85rem; }

.password-field {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  max-width: 400px;
}

.password-field input {
  flex: 1;
  width: 100%;
  padding: 0.65rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-family: inherit;
}

.btn-icon {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.45rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  flex-shrink: 0;
}

.btn-icon:hover { border-color: var(--primary); color: var(--primary); }

#portal-users-table {
  font-size: 0.9rem;
}

/* Sticky save bar */
.sticky-save-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--card-bg);
  border-top: 2px solid var(--primary);
  padding: 0.75rem 2rem;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 1rem;
  box-shadow: 0 -2px 8px rgba(0,0,0,0.08);
  z-index: 50;
}

.sticky-save-bar .status {
  margin: 0;
  font-size: 0.85rem;
}

.sticky-save-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

/* Toast notifications */
#toast-container {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 360px;
}

.toast {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 0.875rem;
  line-height: 1.4;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  animation: toast-in 0.3s ease;
  word-break: break-word;
}

.toast-error { background: #fef2f2; color: #991b1b; border-left: 4px solid var(--danger); }
.toast-success { background: #f0fdf4; color: #166534; border-left: 4px solid var(--success); }
.toast-info { background: #eff6ff; color: #1e40af; border-left: 4px solid var(--primary); }

.toast-exit { opacity: 0; transform: translateX(20px); transition: opacity 0.3s, transform 0.3s; }

@keyframes toast-in {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

/* Table scroll wrapper for mobile */
.table-scroll-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* Nav tab horizontal scroll */
header nav[role="tablist"] {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  white-space: nowrap;
  scrollbar-width: none;
}
header nav[role="tablist"]::-webkit-scrollbar { display: none; }

/* Responsive */
@media (max-width: 768px) {
  header { padding: 0.75rem 1rem; gap: 0.75rem; }
  .tab-content { padding: 1rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .modal-content { width: 95%; max-height: 90vh; }
  .form-row { grid-template-columns: 1fr; }
  .customers-controls { flex-direction: column; align-items: stretch; }
  .customers-controls select { min-width: auto; }
  .customer-form-actions { flex-wrap: wrap; }
  header nav { flex-wrap: nowrap; }
}