:root {
  --bg: #f5f7fa;
  --panel: #ffffff;
  --ink: #1c2430;
  --muted: #6b7380;
  --line: #e4e8ee;
  --archive: #1f4e79;
  --archive-soft: #e8eef5;
  --knowledge: #2f5d50;
  --knowledge-soft: #eaf3ef;
  --accent: #1f4e79;
  --danger: #9b2c2c;
  --sidebar: #172033;
  --sidebar-text: #d7dde8;
  --radius: 6px;
  --font: "IBM Plex Sans", "Noto Sans SC", "Source Han Sans SC", "PingFang SC", sans-serif;
  --mono: "IBM Plex Mono", "Noto Sans Mono", ui-monospace, monospace;
  --main-max: 1120px;
  --reading-max: 720px;
  --control-h: 2.2rem;
  --doc-pad-y: 0.78rem;
  --doc-pad-x: 1rem;
  --space-header: 0.9rem;
  --space-section: 1.35rem;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
  min-height: 100vh;
  font-size: 15px;
}

a { color: var(--archive); text-decoration: none; }
a:hover { text-decoration: underline; }

.app-shell {
  display: grid;
  grid-template-columns: 210px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: var(--sidebar);
  color: var(--sidebar-text);
  padding: 1.35rem 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 1.35rem;
}

.brand-name {
  font-size: 1.1rem;
  font-weight: 650;
  letter-spacing: 0.04em;
}
.brand-sub {
  font-size: 0.78rem;
  opacity: 0.7;
  margin-top: 0.15rem;
}

.nav { display: flex; flex-direction: column; gap: 0.2rem; }
.nav a {
  color: var(--sidebar-text);
  padding: 0.5rem 0.7rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-size: 0.95rem;
}
.nav a:hover { background: rgba(255,255,255,0.06); }
.nav a.active {
  background: rgba(120, 170, 230, 0.18);
  color: #fff;
  font-weight: 600;
}

.sidebar-foot {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 0.85rem;
}
.user-line { margin-bottom: 0.4rem; opacity: 0.85; }
button.linkish {
  background: none;
  border: none;
  color: #9ec3ff;
  cursor: pointer;
  padding: 0;
  font: inherit;
}
button.linkish:hover { text-decoration: underline; }

.main {
  /* Left-anchored content column after sidebar (not marketing-site centered). */
  padding: 1.45rem 1.5rem 2.5rem 1.25rem;
  max-width: var(--main-max);
  width: 100%;
  margin: 0;
}

/* Typography */
.page-header { margin-bottom: var(--space-header); }
.page-header h1 {
  margin: 0 0 0.22rem;
  font-size: 1.65rem;
  font-weight: 650;
  letter-spacing: -0.01em;
  line-height: 1.25;
}
.page-subtitle,
.page-header > .muted {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
  max-width: 40rem;
  line-height: 1.45;
}
.stat-line {
  margin: 0.5rem 0 0;
  font-size: 0.86rem;
}
.section-title {
  margin: 0;
  font-size: 1.12rem;
  font-weight: 650;
}
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.5rem;
  min-height: 1.5rem;
}
.text-link {
  font-size: 0.88rem;
  color: var(--archive);
  white-space: nowrap;
  line-height: 1.2;
}
.row-between { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; }
.muted { color: var(--muted); }
.eyebrow {
  margin: 0 0 0.25rem;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 650;
}
.archive-tone { color: var(--archive); }
.knowledge-tone { color: var(--knowledge); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--control-h);
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  padding: 0.35rem 0.8rem;
  border-radius: var(--radius);
  cursor: pointer;
  font: inherit;
  font-size: 0.9rem;
  text-decoration: none;
  line-height: 1.2;
}
.btn:hover { background: #f4f7fb; text-decoration: none; }
.btn.primary {
  background: var(--archive);
  border-color: var(--archive);
  color: #fff;
}
.btn.primary:hover { filter: brightness(1.06); }
.btn.secondary {
  background: #fff;
  border-color: #b7c8da;
  color: var(--archive);
}
.btn.secondary:hover { background: var(--archive-soft); }
.btn.danger {
  background: #fff;
  border-color: #e2b4b4;
  color: var(--danger);
}
.btn.disabled {
  opacity: 0.45;
  pointer-events: none;
}
.header-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
}
form.inline { display: inline; margin: 0; }

/* Empty / status */
.empty-state {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.15rem 1.15rem;
  max-width: 32rem;
}
.empty-state.compact {
  padding: 0.95rem 1.05rem;
  max-width: 32rem;
}
.empty-title {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 0.3rem;
}
.empty-state .muted { margin: 0 0 0.65rem; font-size: 0.9rem; }
.empty-state .form-actions { margin-top: 0.15rem; }

.status-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.05rem 1.1rem;
  max-width: 30rem;
  width: 100%;
  margin-bottom: var(--space-section);
}
.status-panel.warn {
  border-color: #e2d2b8;
  background: #fbf8f2;
}
.status-panel .empty-title { margin-bottom: 0.28rem; }
.status-panel .muted { margin: 0 0 0.75rem; }

.alert.error {
  background: #f8e8e8;
  color: var(--danger);
  border: 1px solid #e8c4c4;
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  font-size: 0.9rem;
}
.alert.warn {
  background: #fbf7f0;
  color: #6b4e16;
  border: 1px solid #e2d2b8;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
}
.alert.warn p { margin: 0.25rem 0; }

/* Home sections */
.home-section { margin-bottom: var(--space-section); }
.home-section:last-child { margin-bottom: 0; }

/* Document list */
.doc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.doc-item { border-bottom: 1px solid var(--line); }
.doc-item:last-child { border-bottom: none; }
.doc-item-link {
  display: flex;
  justify-content: space-between;
  gap: 0.85rem;
  padding: var(--doc-pad-y) var(--doc-pad-x);
  color: inherit;
  text-decoration: none;
  align-items: center;
}
.doc-list.compact .doc-item-link {
  padding: var(--doc-pad-y) var(--doc-pad-x);
}
.doc-item-link:hover {
  background: #f7f9fc;
  text-decoration: none;
}
.doc-item-link.static:hover { background: transparent; }
.doc-item-main { min-width: 0; flex: 1; }
.doc-title {
  margin: 0 0 0.15rem;
  font-size: 1rem;
  font-weight: 650;
  color: var(--archive);
  line-height: 1.35;
}
h3.doc-title { font-size: 0.96rem; }
.doc-summary {
  margin: 0 0 0.25rem;
  color: var(--ink);
  font-size: 0.9rem;
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.doc-file { margin: 0 0 0.3rem; font-size: 0.84rem; }
.doc-meta { display: flex; flex-wrap: wrap; gap: 0.3rem; align-items: center; }
.doc-time {
  flex: 0 0 auto;
  font-size: 0.8rem;
  white-space: nowrap;
  line-height: 1.2;
  align-self: center;
}
.doc-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
  justify-content: flex-end;
  flex: 0 0 auto;
}
.entry-hint { font-size: 0.78rem; margin-left: 0.35rem; }

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.1rem 0.42rem;
  border-radius: 999px;
  background: #eef1f5;
  font-size: 0.76rem;
  color: #445061;
  line-height: 1.3;
  height: fit-content;
}
.badge.soft {
  background: #f1f4f8;
  color: #3d4a5c;
}
.badge.status-ingesting,
.badge.status-ready_to_archive,
.badge.status-inbox {
  background: var(--archive-soft);
  color: var(--archive);
}
.badge.status-archiving {
  background: var(--knowledge-soft);
  color: var(--knowledge);
}
.badge.status-active {
  background: #e8f0e9;
  color: #2a5a36;
}
.badge.status-failed {
  background: #f7ecec;
  color: #8a3b3b;
}
.badge.status-ignored {
  background: #f0eeea;
  color: #7a756c;
}
.badge.status-knowledge-draft {
  background: #eef1f5;
  color: #445061;
}
.badge.status-knowledge-active {
  background: var(--knowledge-soft);
  color: var(--knowledge);
}
.badge.status-knowledge-archived {
  background: #f0eeea;
  color: #7a756c;
}

/* Filters / archive */
.queue-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  margin: 0 0 0.5rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--line);
  align-items: center;
}
.queue-tab {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  min-height: 1.85rem;
  padding: 0.22rem 0.6rem;
  border-radius: var(--radius);
  color: var(--muted);
  text-decoration: none;
  font-size: 0.88rem;
  line-height: 1.2;
}
.queue-tab:hover { background: #e9eef5; text-decoration: none; color: var(--ink); }
.queue-tab.active {
  background: var(--archive-soft);
  color: var(--archive);
  font-weight: 600;
}
.queue-count {
  font-size: 0.74rem;
  color: var(--muted);
  background: rgba(0,0,0,0.04);
  border-radius: 999px;
  padding: 0.05rem 0.38rem;
  min-width: 1.15rem;
  text-align: center;
  line-height: 1.25;
}
.queue-tab.active .queue-count {
  background: rgba(31,78,121,0.12);
  color: var(--archive);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
  margin-bottom: 0.85rem;
}
.filter-bar .filter-q { flex: 1 1 14rem; min-width: 10rem; }
.filter-bar select,
.filter-bar input[type="search"],
.filter-bar .btn {
  min-height: var(--control-h);
  height: var(--control-h);
}
.filter-bar select { min-width: 7rem; padding-top: 0; padding-bottom: 0; }
.filter-bar input[type="search"] { padding-top: 0; padding-bottom: 0; }

.pager {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 1.1rem;
}
.pager-info { color: var(--muted); font-size: 0.9rem; }

/* Forms */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem;
}
.form-grid label, .stack label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.9rem;
  font-weight: 550;
}
.form-grid .full, .form-actions.full { grid-column: 1 / -1; }
input[type="text"],
input[type="password"],
input[type="number"],
input[type="search"],
select,
textarea {
  font: inherit;
  min-height: var(--control-h);
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
}
textarea {
  resize: vertical;
  font-family: var(--mono);
  font-size: 0.92rem;
  min-height: auto;
}
textarea.body-editor { min-height: 22rem; }
.form-actions { display: flex; gap: 0.65rem; align-items: center; flex-wrap: wrap; }
.tag-checks { display: flex; flex-wrap: wrap; gap: 0.6rem 1rem; }
.check { display: inline-flex; align-items: center; gap: 0.35rem; font-weight: 400; }
fieldset {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
}
legend { padding: 0 0.35rem; color: var(--muted); font-size: 0.85rem; }

/* Reading layout */
.workflow-hint {
  margin: 0.4rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}
.reading-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 250px;
  gap: 1.5rem;
  align-items: start;
  margin-bottom: 1.5rem;
}
.reading-main { min-width: 0; max-width: var(--reading-max); }
.reading-block { margin-bottom: 1.4rem; }
.reading-block h2 {
  margin: 0 0 0.5rem;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 650;
}
.reading-text {
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.65;
  white-space: pre-wrap;
}
.reading-aside { position: sticky; top: 1rem; }
.reading-aside h2 {
  margin: 0 0 0.75rem;
  font-size: 0.9rem;
  color: var(--muted);
}
.meta-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
}
.file-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  background: #fbfcfd;
  margin-bottom: 0.75rem;
}
.file-card-name { margin: 0 0 0.55rem; font-weight: 600; }
.kv {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 0.35rem 0.75rem;
  margin: 0;
}
.kv.compact { grid-template-columns: 4.5rem 1fr; font-size: 0.9rem; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; }
.mono { font-family: var(--mono); font-size: 0.85rem; word-break: break-all; }
.back-link { margin-top: 0.5rem; }

.md-body {
  font-size: 1.02rem;
  line-height: 1.7;
  color: var(--ink);
}
.md-body > *:first-child { margin-top: 0; }
.md-body h1, .md-body h2, .md-body h3 {
  line-height: 1.3;
  margin: 1.25rem 0 0.55rem;
  font-weight: 650;
}
.md-body h1 { font-size: 1.35rem; }
.md-body h2 { font-size: 1.18rem; }
.md-body h3 { font-size: 1.05rem; }
.md-body p { margin: 0 0 0.85rem; }
.md-body ul, .md-body ol { margin: 0 0 0.85rem; padding-left: 1.35rem; }
.md-body code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: #eef2f6;
  padding: 0.1rem 0.3rem;
  border-radius: 3px;
}
.md-body pre {
  background: #f3f5f8;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  overflow-x: auto;
}
.md-body pre code { background: none; padding: 0; }
.md-body blockquote {
  margin: 0 0 0.85rem;
  padding: 0.2rem 0 0.2rem 0.9rem;
  border-left: 3px solid #c5d0dc;
  color: var(--muted);
}
.md-body a { text-decoration: underline; }

/* Taxonomy */
.two-col,
.taxonomy-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
.taxonomy-pane {
  background: var(--panel);
  border: 1px solid #e8ecf1;
  border-radius: var(--radius);
  padding: 1rem 1.05rem 1.1rem;
}
/* Avoid double box when empty-state sits inside a pane. */
.taxonomy-pane .empty-state,
.taxonomy-pane .empty-state.compact {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0.35rem 0 0.55rem;
  max-width: none;
}
.tree-list, .tree-children, .chip-list {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
}
.tree-children { margin: 0.15rem 0 0.55rem 0.85rem; }
.tree-item summary,
.chip-item summary {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  cursor: pointer;
  padding: 0.4rem 0.2rem;
  list-style: none;
}
.tree-item summary::-webkit-details-marker,
.chip-item summary::-webkit-details-marker,
.create-drawer summary::-webkit-details-marker { display: none; }
.tree-name { font-weight: 600; }
.tree-slug { font-size: 0.8rem; }
.tree-branch { color: var(--muted); font-family: var(--mono); }
.nest-form {
  margin: 0.35rem 0 0.75rem;
  padding: 0.65rem;
  background: #f7f9fc;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.inline-form, .row-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
}
.create-drawer { margin-top: 0.35rem; }
.create-drawer > summary.btn {
  list-style: none;
  width: fit-content;
}
.create-drawer[open] > summary.btn { margin-bottom: 0.55rem; }
.chip-list li { margin-bottom: 0.35rem; }

/* Legacy table (login / rare) */
.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.data-table th, .data-table td {
  padding: 0.7rem 0.85rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
.data-table th {
  background: #f5f7fa;
  font-size: 0.82rem;
  color: var(--muted);
  font-weight: 600;
}

/* Login */
.login-body {
  display: grid;
  place-items: center;
  min-height: 100vh;
  background: linear-gradient(180deg, #e8eef5 0%, #f5f7fa 45%, #f5f7fa 100%);
}
.login-card {
  width: min(380px, calc(100vw - 2rem));
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.75rem;
}
.login-card .brand { margin-bottom: 1.25rem; color: var(--ink); }
.stack { display: flex; flex-direction: column; gap: 0.9rem; }

/* Legacy count cards kept for safety but unused on home */
.count-row { display: none; }

@media (max-width: 860px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem 1rem;
  }
  .nav { flex-direction: row; flex-wrap: wrap; }
  .sidebar-foot {
    margin-top: 0;
    border-top: none;
    display: flex;
    gap: 0.75rem;
    align-items: center;
  }
  .main { padding: 1.15rem 1rem 2rem; }
  .form-grid,
  .two-col,
  .taxonomy-layout,
  .reading-layout { grid-template-columns: 1fr; }
  .row-between { flex-direction: column; }
  .reading-aside { position: static; }
  .doc-item-link { flex-direction: column; gap: 0.45rem; }
  .doc-actions { justify-content: flex-start; }
}