/* ===== Color Palette ===== */
:root {
  --primary: #2563EB;
  --primary-hover: #1D4ED8;
  --primary-light: #EFF6FF;
  --primary-muted: #DBEAFE;
  --bg: #FFFFFF;
  --bg-subtle: #F8FAFC;
  --bg-muted: #F1F5F9;
  --text: #1E293B;
  --text-secondary: #475569;
  --text-muted: #64748B;
  --text-faint: #94A3B8;
  --border: #E2E8F0;
  --border-light: #F1F5F9;
  --accent: #F59E0B;
  --accent-hover: #D97706;
  --success: #22C55E;
  --success-hover: #16A34A;
  --success-light: #F0FDF4;
  --error: #EF4444;
  --error-hover: #DC2626;
  --purple: #7C3AED;
  --purple-light: #F5F3FF;
  --shadow: rgba(0, 0, 0, .06);
  --shadow-md: rgba(0, 0, 0, .1);
}

/* ===== Reset & Base ===== */
[x-cloak] { display: none !important; }
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg-subtle);
  color: var(--text);
  padding: 20px;
  max-width: 1100px;
  margin: 0 auto;
  line-height: 1.5;
}

h1 {
  font-size: 1.5rem;
  margin-bottom: 20px;
  color: var(--text);
}

/* ===== Layout ===== */
.card {
  background: var(--bg);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px var(--shadow);
  border: 1px solid var(--border);
}

.row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.row > div {
  flex: 1;
  min-width: 180px;
}

/* ===== Forms ===== */
label {
  display: block;
  font-size: .85rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

input,
textarea,
select {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: .9rem;
  margin-bottom: 12px;
  color: var(--text);
  background: var(--bg);
  transition: border-color .15s;
}

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

textarea {
  resize: vertical;
  min-height: 60px;
}

/* ===== Buttons ===== */
button {
  padding: 6px 14px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: .85rem;
  transition: background .15s, transform .1s;
}

button:active {
  transform: scale(.97);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-sm {
  padding: 4px 8px;
  font-size: .75rem;
  margin-right: 2px;
  border-radius: 6px;
}

.btn-icon {
  padding: 4px 6px;
  background: transparent;
  border: none;
  color: var(--text-faint);
  border-radius: 6px;
  cursor: pointer;
  transition: color .15s, background .15s;
}

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

.btn-icon-danger:hover {
  color: var(--error);
  background: #FEF2F2;
}

.btn-danger {
  background: var(--error);
  color: #fff;
}

.btn-danger:hover {
  background: var(--error-hover);
}

.btn-success {
  background: var(--success);
  color: #fff;
}

.btn-success:hover {
  background: var(--success-hover);
}

.btn-outline {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-secondary);
}

.btn-outline:hover {
  background: var(--bg-subtle);
}

.btn-warn {
  background: var(--accent);
  color: #fff;
}

.btn-warn:hover {
  background: var(--accent-hover);
}

/* ===== Tables ===== */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: .85rem;
}

th,
td {
  padding: 10px 8px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  background: var(--bg-subtle);
  font-weight: 600;
  color: var(--text-secondary);
  position: sticky;
  top: 0;
  white-space: nowrap;
}

.col-size {
  width: 70px;
  white-space: nowrap;
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--text-muted);
  font-size: .8rem;
}

.col-type {
  width: 60px;
  text-align: center;
}

.col-date {
  width: 90px;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
  color: var(--text-muted);
  font-size: .8rem;
}

tr:hover {
  background: var(--primary-light);
}

th.sortable {
  cursor: pointer;
  user-select: none;
}

th.sortable:hover {
  color: var(--primary);
}

/* ===== Tags & Status ===== */
.tag {
  display: inline-block;
  background: var(--primary-muted);
  color: var(--primary);
  padding: 2px 8px;
  border-radius: 10px;
  font-size: .75rem;
  font-weight: 500;
}

.deleted-row {
  opacity: .5;
  text-decoration: line-through;
}

.empty {
  text-align: center;
  padding: 40px;
  color: var(--text-faint);
  line-height: 1.8;
}

/* ===== Tabs ===== */
.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.tabs button {
  border-bottom: 2px solid transparent;
  padding-bottom: 6px;
}

.tabs .active {
  border-bottom-color: var(--primary);
  color: var(--primary);
  font-weight: 600;
}

/* ===== Projects ===== */
.project-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  border-radius: 4px;
  transition: background .15s;
}

.project-item:last-child {
  border-bottom: none;
}

.project-item:hover {
  background: var(--primary-light);
}

.project-name {
  font-weight: 500;
  font-size: 1rem;
  color: var(--text);
}

.project-desc {
  font-size: .8rem;
  color: var(--text-faint);
  margin-left: 8px;
}

.project-count {
  font-size: .8rem;
  color: var(--text-muted);
  margin-left: 8px;
  background: var(--bg-muted);
  padding: 2px 8px;
  border-radius: 10px;
}

.project-actions {
  display: flex;
  gap: 4px;
  align-items: center;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-size: .95rem;
}

.breadcrumb a {
  color: var(--primary);
  text-decoration: none;
  cursor: pointer;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb .sep {
  color: var(--text-faint);
}

/* ===== Dropzone ===== */
.dropzone {
  border: 2px dashed var(--border);
  border-radius: 10px;
  padding: 32px 20px;
  text-align: center;
  cursor: pointer;
  transition: all .2s;
  margin-bottom: 12px;
}

.dropzone:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.dropzone.dragover {
  border-color: var(--primary);
  background: var(--primary-muted);
}

.dropzone.has-file {
  border-color: var(--success);
  background: var(--success-light);
  border-style: solid;
}

.dropzone-icon {
  font-size: 2rem;
  margin-bottom: 8px;
}

.dropzone-text {
  color: var(--text-faint);
  font-size: .9rem;
}

.dropzone-filename {
  color: var(--success);
  font-weight: 500;
  font-size: .95rem;
}

/* ===== Upload Queue ===== */
.upload-queue {
  margin-top: 12px;
}

.upload-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
  border-bottom: 1px solid var(--border-light);
  font-size: .8rem;
}

.upload-item:last-child {
  border-bottom: none;
}

.upload-item-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.upload-progress {
  flex: 2;
  height: 4px;
  background: var(--bg-muted);
  border-radius: 2px;
  overflow: hidden;
}

.upload-progress-bar {
  height: 100%;
  border-radius: 2px;
  transition: width .2s;
  background: var(--primary);
}

.upload-progress-bar.done {
  background: var(--success);
}

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

.upload-progress-bar.duplicate {
  background: var(--accent);
}

.upload-item-pct {
  width: 32px;
  text-align: right;
  color: var(--text-faint);
  font-size: .75rem;
}

/* ===== Search ===== */
.search-box {
  width: 100%;
  padding: 8px 10px 8px 32px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: .9rem;
  margin-bottom: 12px;
  background: var(--bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2394A3B8' viewBox='0 0 16 16'%3E%3Cpath d='M11.742 10.344a6.5 6.5 0 1 0-1.397 1.398h-.001l3.85 3.85a1 1 0 0 0 1.415-1.414l-3.85-3.85zm-5.242.156a5 5 0 1 1 0-10 5 5 0 0 1 0 10z'/%3E%3C/svg%3E") no-repeat 8px center;
  background-size: 16px;
}

.search-box::placeholder {
  color: var(--text-faint);
}

/* ===== Semantic Search Results ===== */
.semantic-results {
  margin-top: 12px;
}

.semantic-card {
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  margin-bottom: 8px;
  cursor: pointer;
  transition: border-color .15s, box-shadow .15s;
}

.semantic-card:hover {
  border-color: var(--primary);
  box-shadow: 0 2px 8px var(--shadow);
}

.semantic-card-title {
  font-weight: 600;
  font-size: .9rem;
  margin-bottom: 4px;
  color: var(--text);
}

.semantic-card-link {
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  word-break: break-word;
}

.semantic-card-link:hover {
  text-decoration: underline;
  color: var(--primary);
}

.semantic-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
}

.semantic-card-header .semantic-card-title {
  flex: 1;
  min-width: 0;
}

.semantic-card-actions {
  display: flex;
  gap: 2px;
  flex-shrink: 0;
  opacity: 0;
  transition: opacity .15s;
}

.semantic-card:hover .semantic-card-actions {
  opacity: 1;
}

.semantic-card-preview {
  font-size: .8rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.semantic-card-meta {
  font-size: .75rem;
  color: var(--text-faint);
  margin-top: 4px;
}

/* ===== Index Status Indicators ===== */
.idx-status {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 4px;
  vertical-align: middle;
}

.idx-indexed {
  background: var(--success);
}

.idx-indexing {
  background: var(--accent);
  animation: pulse 1s infinite;
}

.idx-failed {
  background: var(--error);
}

.idx-pending {
  background: var(--border);
}

/* ===== Ask Answer ===== */
.ask-answer {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-left: 3px solid var(--purple);
  border-radius: 8px;
  padding: 16px;
  margin-top: 12px;
  line-height: 1.6;
  font-size: .9rem;
}

.ask-sources {
  margin-top: 12px;
}

.ask-source {
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  margin-bottom: 6px;
  font-size: .8rem;
  cursor: pointer;
  transition: border-color .15s;
}

.ask-source:hover {
  border-color: var(--primary);
}

.ask-source-name {
  font-weight: 600;
  color: var(--primary);
}

.ask-source-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.ask-source-header .ask-source-name {
  flex: 1;
  min-width: 0;
}

.ask-source-snippet {
  color: var(--text-muted);
  margin-top: 4px;
}

/* ===== Markdown content in ask answers ===== */
.ask-answer h1 { font-size: 1.3rem; margin: 12px 0 8px; color: var(--text); }
.ask-answer h2 { font-size: 1.15rem; margin: 10px 0 6px; color: var(--text); }
.ask-answer h3 { font-size: 1rem; margin: 8px 0 4px; color: var(--text-secondary); }
.ask-answer ul, .ask-answer ol { padding-left: 20px; margin: 6px 0; }
.ask-answer li { margin: 2px 0; }
.ask-answer strong { font-weight: 600; }
.ask-answer em { font-style: italic; }
.ask-answer a { color: var(--primary); text-decoration: underline; }
.ask-answer code { background: var(--bg-muted); padding: 1px 4px; border-radius: 3px; font-size: 0.85em; }
.ask-answer pre { background: var(--bg-muted); padding: 8px 12px; border-radius: 4px; overflow-x: auto; margin: 8px 0; }
.ask-answer pre code { background: none; padding: 0; }
.ask-answer p { margin: 6px 0; }
.ask-answer blockquote { border-left: 3px solid var(--border); padding-left: 12px; color: var(--text-muted); margin: 8px 0; }

/* ===== Section Headers ===== */
.section-title {
  font-size: 1.1rem;
  margin-bottom: 12px;
  color: var(--text);
}

/* ===== Flex Utilities ===== */
.flex-row { display: flex; gap: 8px; }
.flex-row-wrap { display: flex; gap: 12px; flex-wrap: wrap; }
.flex-row-wrap > div { flex: 1; min-width: 180px; }
.flex-end { display: flex; gap: 8px; justify-content: flex-end; }
.flex-center { display: flex; align-items: center; gap: 8px; }
.btn-create-col {
  flex: 0;
  min-width: auto;
  display: flex;
  align-items: flex-end;
  padding-bottom: 12px;
}

/* ===== Text ===== */
.text-muted { color: var(--text-faint); font-size: .85em; }
.text-small { font-size: .85rem; font-weight: 600; margin-bottom: 6px; color: var(--text-secondary); }
.text-xs { font-size: .75rem; color: var(--text-faint); }
.text-xs-purple { font-size: .75rem; color: var(--purple); margin-top: 2px; }
.text-purple { font-size: .8rem; color: var(--purple); margin-bottom: 4px; }
.text-purple-sm { font-size: .8rem; color: var(--purple); }

/* ===== Buttons ===== */
.btn-ask {
  border-color: var(--purple);
  color: var(--purple);
}

/* ===== Modal ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, .4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
}
.modal-card {
  width: 500px;
  max-width: 90vw;
}

/* ===== Collapsible ===== */
.collapsible-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}
.collapse-icon {
  font-size: 1.2rem;
  color: var(--text-faint);
  transition: transform .2s;
}
.collapse-icon.rotated {
  transform: rotate(45deg);
}

/* ===== Misc ===== */
.nowrap { white-space: nowrap; }
.hidden-input { display: none; }
.cursor-pointer { cursor: pointer; }
.search-textarea {
  width: 100%;
  min-height: 60px;
  resize: vertical;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: .9rem;
  margin-bottom: 8px;
  font-family: inherit;
  color: var(--text);
  background: var(--bg);
}

.search-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-muted);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  body { padding: 12px; }
  .card { padding: 14px; margin-bottom: 14px; }
  .col-size, .col-type, .col-date { display: none; }
  .row > div { min-width: 100%; }
  .search-textarea { min-height: 48px; }
  .breadcrumb { font-size: .85rem; }
}

/* ===== Lucide Icons ===== */
.icon-sm { width: 14px; height: 14px; vertical-align: middle; }
.icon-btn { width: 14px; height: 14px; vertical-align: middle; margin-right: 2px; }
.icon-lg { width: 32px; height: 32px; color: var(--text-faint); margin-bottom: 8px; }
.icon-xl { width: 40px; height: 40px; color: var(--text-faint); }

/* ===== Toast Notifications ===== */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 100;
  display: flex;
  flex-direction: column-reverse;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background: var(--text);
  color: #fff;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: .85rem;
  box-shadow: 0 4px 12px rgba(0,0,0,.15);
  pointer-events: auto;
  animation: toast-in .3s ease;
  max-width: 380px;
}

.toast-success { border-left: 4px solid var(--success); }
.toast-error { border-left: 4px solid var(--error); }
.toast-info { border-left: 4px solid var(--primary); }

@keyframes toast-in {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
  .toast-container { left: 12px; right: 12px; bottom: 12px; }
  .toast { max-width: 100%; }
}

/* ===== Animations ===== */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .4; }
}