/* ---------- Design tokens ---------- */
:root {
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.5rem;
  --sp-6: 2.25rem;

  --radius-sm: 6px;
  --radius-md: 10px;

  --warning-bg: #fff6dd;
  --warning-fg: #7a5900;
  --warning-border: #f0cf6b;

  --success-bg: #e3f6e9;
  --success-fg: #1c6b3a;

  --danger-bg: #fdeaea;
  --danger-fg: #a32424;

  --info-bg: #e8f1fd;
  --info-fg: #1a4f8a;

  --surface-tint: #f4f6f8;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08), 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 14px rgba(15, 23, 42, 0.1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --warning-bg: #443300;
    --warning-fg: #ffdd7a;
    --warning-border: #6b5200;

    --success-bg: #113322;
    --success-fg: #7bdba0;

    --danger-bg: #3a1414;
    --danger-fg: #ff9a9a;

    --info-bg: #12253f;
    --info-fg: #8fc0ff;

    --surface-tint: rgba(255, 255, 255, 0.035);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.45);
  }
}

* {
  box-sizing: border-box;
}

mark {
  background-color: #fff2a8;
  color: #111;
  padding: 0 0.15em;
  border-radius: 3px;
}

.muted {
  opacity: 0.7;
  font-size: 0.9em;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.75rem;
  font-weight: 600;
  opacity: 0.6;
  margin: 0 0 var(--sp-1) 0;
}

hr {
  margin: var(--sp-5) 0;
  border: none;
  border-top: 1px solid var(--pico-muted-border-color);
}

/* ---------- Layout helpers ---------- */
.page-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--sp-4);
  margin-bottom: var(--sp-5);
}

.page-header h2 {
  margin-bottom: var(--sp-1);
}

.page-header p {
  margin-bottom: 0;
}

.breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  font-size: 0.9rem;
  margin-bottom: var(--sp-4);
  color: var(--pico-muted-color);
  text-decoration: none;
}

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

.section {
  margin-bottom: var(--sp-6);
}

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  margin-bottom: var(--sp-3);
}

.section-title h3 {
  margin: 0;
}

/* ---------- Buttons & action rows ---------- */
.actions,
.actions-row {
  display: flex;
  gap: var(--sp-2);
  align-items: center;
  flex-wrap: wrap;
  margin: 0;
}

.actions form,
.actions-row form {
  margin: 0;
}

.inline-form {
  display: inline;
}

button,
[type="submit"],
[type="button"],
a[role="button"] {
  width: auto;
}

.btn-sm,
button.btn-sm,
a.btn-sm {
  --pico-form-element-spacing-vertical: 0.35rem;
  --pico-form-element-spacing-horizontal: 0.75rem;
  font-size: 0.85rem;
  width: auto;
  margin: 0;
}

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

.btn-ghost {
  background: transparent;
  border-color: var(--pico-muted-border-color);
  color: var(--pico-color);
}

/* Compact single-row forms: replaces scattered style="width:auto;display:inline-block" */
.form-row {
  display: flex;
  align-items: flex-end;
  gap: var(--sp-2);
  flex-wrap: wrap;
  margin: 0;
}

.form-row label {
  flex: 1 1 12ch;
  min-width: 10ch;
  margin: 0;
}

.form-row input,
.form-row select {
  width: 100%;
  margin: 0;
}

.form-row button {
  flex: 0 0 auto;
  margin: 0;
}

/* ---------- Cards ---------- */
.card {
  background: var(--pico-card-background-color);
  border: 1px solid var(--pico-card-border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: var(--sp-4);
  margin-bottom: var(--sp-4);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--sp-4);
}

.entity-card {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.entity-card header {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.entity-card .entity-icon {
  font-size: 1.4rem;
  line-height: 1;
}

.entity-card h4 {
  margin: 0;
  font-size: 1.05rem;
}

.entity-card p {
  margin: 0;
  flex: 1 1 auto;
}

.entity-card footer {
  display: flex;
  gap: var(--sp-2);
  align-items: center;
  justify-content: space-between;
  padding-top: var(--sp-2);
}

.empty-state {
  text-align: center;
  padding: var(--sp-6) var(--sp-4);
  border: 1px dashed var(--pico-muted-border-color);
  border-radius: var(--radius-md);
  color: var(--pico-muted-color);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--sp-3);
}

.stat-card {
  text-align: center;
}

.stat-card .stat-value {
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1.2;
}

.empty-state .empty-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: var(--sp-2);
  opacity: 0.8;
}

/* ---------- Badges ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
  padding: 0.15em 0.65em;
  border-radius: 999px;
  font-size: 0.75em;
  font-weight: 600;
  white-space: nowrap;
  background: var(--info-bg);
  color: var(--info-fg);
}

.badge-success {
  background: var(--success-bg);
  color: var(--success-fg);
}

.badge-warning {
  background: var(--warning-bg);
  color: var(--warning-fg);
}

.badge-danger {
  background: var(--danger-bg);
  color: var(--danger-fg);
}

.badge-role {
  background: var(--surface-tint);
  color: var(--pico-color);
  border: 1px solid var(--pico-muted-border-color);
}

/* ---------- Tables ---------- */
.table-wrap {
  overflow-x: auto;
}

table td,
table th {
  vertical-align: middle;
}

/* ---------- Folder / document tree ---------- */
.tree {
  list-style: none;
  padding-left: var(--sp-5);
  margin: 0;
  border-left: 1px dashed var(--pico-muted-border-color);
}

.tree.tree-root {
  padding-left: 0;
  border-left: none;
}

.tree li {
  margin: var(--sp-1) 0;
}

.tree-node {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-wrap: wrap;
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-sm);
}

.tree-node:hover {
  background: var(--surface-tint);
}

.tree-node .tree-icon {
  font-size: 1.05em;
}

.tree-node .tree-name {
  font-weight: 600;
}

.tree-node .grow {
  flex: 1 1 auto;
  min-width: 0;
}

.tree-node .grow a {
  overflow-wrap: anywhere;
}

.tree-manage {
  margin: var(--sp-1) 0 var(--sp-2) var(--sp-3);
}

.tree-manage > summary {
  --pico-form-element-spacing-vertical: 0.25rem;
  --pico-form-element-spacing-horizontal: 0.65rem;
  width: auto;
  font-size: 0.82rem;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
}

.tree-manage > summary::-webkit-details-marker {
  display: none;
}

.tree-manage-panel {
  background: var(--surface-tint);
  border: 1px solid var(--pico-muted-border-color);
  border-radius: var(--radius-md);
  padding: var(--sp-3) var(--sp-4);
  margin-top: var(--sp-2);
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  max-width: 640px;
}

.tree-manage-panel .form-row {
  margin: 0;
}

.tree-manage-panel .action-label {
  font-size: 0.78rem;
  font-weight: 600;
  opacity: 0.65;
  margin-bottom: var(--sp-1);
  display: block;
}

.tree-manage-panel .danger-row {
  border-top: 1px solid var(--pico-muted-border-color);
  padding-top: var(--sp-3);
}

/* ---------- Search ---------- */
.search-hit {
  border-bottom: 1px solid var(--pico-muted-border-color);
  padding: var(--sp-4) 0;
}

.search-hit:first-child {
  padding-top: 0;
}

.search-hit:last-child {
  border-bottom: none;
}

.search-hit-title {
  font-size: 1.05rem;
  margin-bottom: var(--sp-1);
}

.search-hit-meta {
  margin-bottom: var(--sp-2);
}

.search-hit-snippet {
  margin: 0;
  line-height: 1.55;
}

/* ---------- Flash / banners ---------- */
.flash {
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--sp-4);
  border: 1px solid transparent;
}

.flash-error {
  background: var(--danger-bg);
  color: var(--danger-fg);
  border-color: var(--danger-fg);
}

.flash-success {
  background: var(--success-bg);
  color: var(--success-fg);
  border-color: var(--success-fg);
}

.flash-info {
  background: var(--info-bg);
  color: var(--info-fg);
  border-color: var(--info-fg);
}

.assistant-banner {
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-md);
  background: var(--warning-bg);
  color: var(--warning-fg);
  border: 1px solid var(--warning-border);
  margin-bottom: var(--sp-4);
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

/* ---------- Nav ---------- */
body > header.container {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--pico-background-color);
  border-bottom: 1px solid var(--pico-muted-border-color);
  padding-top: var(--sp-3);
  padding-bottom: var(--sp-3);
}

body > header.container nav ul li a.brand {
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -0.01em;
}

nav .nav-link.active {
  color: var(--pico-primary);
  font-weight: 600;
}

nav .htmx-indicator {
  opacity: 0;
  transition: opacity 200ms ease-in;
}

.htmx-request .htmx-indicator,
.htmx-request.htmx-indicator {
  opacity: 1;
}

/* ---------- Auth pages ---------- */
.auth-shell {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.auth-card {
  width: 100%;
  max-width: 420px;
}

.auth-card .eyebrow {
  text-align: center;
}

.auth-card h2 {
  text-align: center;
  margin-bottom: var(--sp-4);
}

.auth-card footer {
  text-align: center;
  font-size: 0.9rem;
}

/* ---------- Chat / assistant ---------- */
.chat-thread {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  margin-bottom: var(--sp-4);
}

.chat-row {
  display: flex;
  gap: var(--sp-2);
  align-items: flex-start;
}

.chat-row-user {
  flex-direction: row-reverse;
}

.chat-row-content {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.chat-row-user .chat-row-content {
  align-items: flex-end;
}

.chat-avatar {
  flex: 0 0 auto;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  background: var(--pico-primary-background);
  color: var(--pico-primary-inverse);
}

.chat-row-clarification .chat-avatar,
.chat-row-assistant .chat-avatar {
  background: var(--surface-tint);
  color: var(--pico-color);
  border: 1px solid var(--pico-muted-border-color);
}

.chat-msg {
  border-radius: var(--radius-md);
  padding: var(--sp-3) var(--sp-4);
  border: 1px solid var(--pico-card-border-color);
  box-shadow: var(--shadow-sm);
  max-width: min(640px, 78%);
}

.chat-msg-role {
  font-size: 0.75em;
  opacity: 0.65;
  margin-bottom: var(--sp-1);
  display: flex;
  gap: var(--sp-2);
  align-items: baseline;
}

.chat-msg-content {
  white-space: pre-wrap;
  word-break: break-word;
  font-family: inherit;
  margin: 0;
  line-height: 1.5;
}

.chat-msg-user {
  background: var(--pico-primary-background);
  color: var(--pico-primary-inverse);
  border-color: var(--pico-primary-border);
}

.chat-msg-user .chat-msg-role {
  opacity: 0.85;
}

.chat-msg-assistant {
  background: var(--pico-card-background-color);
}

.chat-msg-clarification {
  background: var(--warning-bg);
  color: var(--warning-fg);
  border-style: dashed;
  border-color: var(--warning-border);
}

.citations {
  margin: var(--sp-1) 0 0 0;
  font-size: 0.85em;
  max-width: min(640px, 100%);
}

.citations ul {
  margin: var(--sp-1) 0 0 1.2rem;
  padding: 0;
}

.chat-status {
  font-size: 0.85em;
  opacity: 0.7;
}

.chat-status::after {
  content: "";
  display: inline-block;
  width: 0.4em;
  height: 0.4em;
  margin-left: 0.4em;
  border-radius: 50%;
  background: currentColor;
  animation: pulse 1.2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.25; }
  50% { opacity: 1; }
}

.chat-composer {
  position: sticky;
  bottom: 0;
  background: var(--pico-background-color);
  padding-top: var(--sp-3);
  display: flex;
  gap: var(--sp-2);
  align-items: flex-end;
}

.chat-composer textarea {
  margin: 0;
  resize: none;
  max-height: 12rem;
}

.chat-composer button {
  width: auto;
  flex: 0 0 auto;
  margin: 0;
}

.chat-hint {
  font-size: 0.78rem;
  opacity: 0.55;
  margin: var(--sp-1) 0 0 0;
}

.session-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  padding: var(--sp-3) 0;
  border-bottom: 1px solid var(--pico-muted-border-color);
}

.session-list li:last-child {
  border-bottom: none;
}

.copy-field {
  display: flex;
  gap: var(--sp-2);
  align-items: center;
}

.copy-field code {
  flex: 1 1 auto;
  overflow-x: auto;
  white-space: nowrap;
}