:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --border: #e3e5ea;
  --text: #1a1d23;
  --muted: #6b7280;
  --accent: #2f6feb;
  --accent-hover: #1f5ad9;
  --danger: #dc2626;
  --success: #16a34a;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 4px 12px rgba(0, 0, 0, 0.04);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--accent);
}

.brand h1 {
  margin: 0;
  font-size: 1.15rem;
  color: var(--text);
  font-weight: 600;
}

nav {
  display: flex;
  gap: 0.25rem;
}

.tab {
  background: transparent;
  border: none;
  padding: 0.5rem 0.9rem;
  border-radius: 6px;
  font-size: 0.92rem;
  color: var(--muted);
  cursor: pointer;
  font-weight: 500;
}

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

.tab.active {
  background: var(--accent);
  color: #fff;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.project-switcher {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.5rem 0.3rem 0.6rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--muted);
}

.project-switcher select {
  border: none;
  background: transparent;
  font: inherit;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  padding: 0.15rem 0.3rem;
  max-width: 220px;
}

.project-switcher select:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-radius: 4px;
}

.project-switcher button {
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: pointer;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  font-size: 1rem;
  line-height: 1;
}

.project-switcher button:hover {
  background: #fff;
  color: var(--accent);
}

#delete-project-btn:hover {
  color: var(--danger);
}

.ai-status {
  font-size: 0.78rem;
  padding: 0.3rem 0.6rem;
  border-radius: 999px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.ai-status.online {
  background: #ecfdf5;
  color: var(--success);
}

.ai-status.offline {
  background: #fef2f2;
  color: var(--danger);
}

.ai-status::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow);
}

.card h2 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.muted {
  color: var(--muted);
  font-size: 0.92rem;
}

.muted.small {
  font-size: 0.85rem;
  margin: 0;
}

label {
  display: block;
  margin-top: 1rem;
}

label > span {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: var(--text);
}

input[type="text"],
textarea {
  width: 100%;
  padding: 0.65rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font: inherit;
  background: #fff;
  color: var(--text);
  resize: vertical;
}

input[type="text"]:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(47, 111, 235, 0.15);
}

button.primary {
  margin-top: 1.25rem;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 0.65rem 1.1rem;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  font-size: 0.95rem;
}

button.primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

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

.mode-switch {
  display: inline-flex;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 3px;
  margin: 0.4rem 0 1.2rem;
  gap: 2px;
}

.mode-btn {
  background: transparent;
  border: none;
  padding: 0.4rem 0.85rem;
  font-size: 0.88rem;
  color: var(--muted);
  cursor: pointer;
  border-radius: 5px;
  font-weight: 500;
  font-family: inherit;
}

.mode-btn:hover {
  color: var(--text);
}

.mode-btn.active {
  background: #fff;
  color: var(--accent);
  font-weight: 600;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06);
}

.mode-panel {
  display: none;
}

.mode-panel.active {
  display: block;
}

.extract-results {
  margin-top: 1.5rem;
  display: grid;
  gap: 0.9rem;
}

.extract-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.9rem;
  background: #fbfbfd;
}

.extract-card label {
  margin-top: 0.6rem;
}

.extract-card label:first-of-type {
  margin-top: 0;
}

.extract-card .row-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.7rem;
  align-items: center;
}

.extract-card input[type="checkbox"].include {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.extract-card .toggle-label {
  font-size: 0.88rem;
  color: var(--muted);
  cursor: pointer;
}

.extract-summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 1rem 0 0.6rem;
  font-size: 0.92rem;
  color: var(--text);
}

.persona-picker {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.6rem 0.8rem;
  background: #fff;
  max-height: 220px;
  overflow-y: auto;
}

.persona-picker label {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  margin: 0.3rem 0;
  font-weight: 400;
  cursor: pointer;
}

.persona-picker label > span {
  font-weight: 400;
  margin: 0;
  font-size: 0.95rem;
}

.persona-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.75rem;
}

.persona-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.9rem;
  background: #fbfbfd;
}

.persona-card h3 {
  margin: 0 0 0.3rem;
  font-size: 1rem;
}

.persona-card .preview {
  font-size: 0.85rem;
  color: var(--muted);
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.doc-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-top: 0.5rem;
}

.doc-badge {
  font-size: 0.72rem;
  padding: 0.15rem 0.5rem;
  background: rgba(47, 111, 235, 0.1);
  color: var(--accent);
  border-radius: 999px;
  max-width: 180px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.persona-card .actions {
  margin-top: 0.6rem;
  display: flex;
  gap: 0.5rem;
}

.persona-card .actions button {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.25rem 0.6rem;
  font-size: 0.82rem;
  cursor: pointer;
  color: var(--muted);
}

.persona-card .actions button:hover {
  color: var(--danger);
  border-color: var(--danger);
}

.results {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}

.answer-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.1rem;
  box-shadow: var(--shadow);
}

.answer-card h3 {
  margin: 0 0 0.6rem;
  font-size: 0.98rem;
  color: var(--accent);
}

.answer-card p {
  margin: 0;
  white-space: pre-wrap;
  font-size: 0.94rem;
}

.dropzone {
  border: 2px dashed var(--border);
  border-radius: 10px;
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--muted);
  cursor: pointer;
  transition:
    border-color 0.15s,
    background 0.15s;
  margin-top: 0.5rem;
}

.dropzone:hover,
.dropzone:focus-visible,
.dropzone.dragover {
  border-color: var(--accent);
  background: rgba(47, 111, 235, 0.05);
  outline: none;
}

.dropzone p {
  margin: 0.6rem 0 0;
  font-size: 0.95rem;
}

.dropzone .link {
  color: var(--accent);
  text-decoration: underline;
}

.upload-progress {
  margin-top: 0.8rem;
  font-size: 0.88rem;
  color: var(--text);
}

.upload-progress .row {
  margin: 0.2rem 0;
}

.upload-progress .ok {
  color: var(--success);
}

.upload-progress .err {
  color: var(--danger);
}

.document-list {
  display: grid;
  gap: 0.6rem;
}

.document-row {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fbfbfd;
}

.document-row .icon {
  color: var(--accent);
  flex-shrink: 0;
}

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

.document-row .name {
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.document-row .meta {
  font-size: 0.82rem;
  color: var(--muted);
}

.document-row button {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.3rem 0.6rem;
  font-size: 0.82rem;
  color: var(--muted);
  cursor: pointer;
}

.document-row button:hover {
  color: var(--danger);
  border-color: var(--danger);
}

.history-item {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  margin-top: 1rem;
}

.history-item:first-child {
  border-top: none;
  padding-top: 0;
  margin-top: 0;
}

.history-item .question {
  font-weight: 600;
  margin: 0 0 0.4rem;
}

.history-item .meta {
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 0.6rem;
}

.history-item details summary {
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--accent);
  margin-top: 0.3rem;
}

.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--text);
  color: #fff;
  padding: 0.7rem 1rem;
  border-radius: 6px;
  font-size: 0.9rem;
  box-shadow: var(--shadow);
  z-index: 50;
  opacity: 0;
  transform: translateY(8px);
  transition:
    opacity 0.2s,
    transform 0.2s;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  vertical-align: -2px;
  margin-right: 0.5rem;
}

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