:root {
  color-scheme: dark;
  --bg: #0b1118;
  --sidebar: #0f1722;
  --panel: #121b27;
  --panel-2: #162131;
  --line: #243244;
  --ink: #e7edf6;
  --muted: #8fa0b5;
  --soft: #1b2838;
  --accent: #31c6a3;
  --accent-strong: #22a788;
  --blue: #6aa7ff;
  --coral: #ff9b8f;
  --gold: #d6b86c;
  --danger: #ff7b6e;
  --warn: #d6a85c;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: radial-gradient(circle at 80% 0%, rgba(49, 198, 163, .12), transparent 28%), var(--bg);
  color: var(--ink);
}
a { color: inherit; text-decoration: none; }
button, input, select, textarea {
  font: inherit;
  border: 1px solid var(--line);
  border-radius: 6px;
}
input, select, textarea {
  width: 100%;
  color: var(--ink);
  background: #0d1520;
  padding: 11px 12px;
  outline: none;
}
input:focus, select:focus, textarea:focus {
  border-color: rgba(49, 198, 163, .72);
  box-shadow: 0 0 0 3px rgba(49, 198, 163, .12);
}
textarea { resize: vertical; line-height: 1.65; }
button, .primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 14px;
  color: #06110f;
  background: var(--accent);
  border-color: var(--accent);
  cursor: pointer;
  font-weight: 700;
}
button:hover, .primary:hover { background: var(--accent-strong); }
button:disabled {
  cursor: not-allowed;
  opacity: .68;
}
.danger {
  color: var(--danger);
  background: rgba(255, 123, 110, .1);
  border-color: rgba(255, 123, 110, .28);
}
.ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 12px;
  color: var(--ink);
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 6px;
}
.compact-action {
  min-height: 34px;
  white-space: nowrap;
}

.shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
}
.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 22px;
  padding: 22px 16px;
  background: rgba(15, 23, 34, .94);
  border-right: 1px solid var(--line);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px;
}
.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  color: #06110f;
  background: linear-gradient(135deg, #31c6a3, #a9e8cf);
  font-weight: 900;
}
.brand strong { display: block; font-size: 17px; }
.brand em { display: block; margin-top: 3px; color: var(--muted); font-size: 12px; font-style: normal; }
.nav {
  display: grid;
  align-content: start;
  gap: 5px;
}
.nav a {
  padding: 11px 13px;
  border-radius: 7px;
  color: var(--muted);
}
.nav a:hover { color: var(--ink); background: rgba(255,255,255,.04); }
.nav a.active {
  color: var(--ink);
  background: var(--soft);
  box-shadow: inset 3px 0 0 var(--accent);
}
.sidebar-foot {
  display: grid;
  gap: 8px;
  padding: 12px;
  color: var(--muted);
  background: rgba(255,255,255,.03);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 13px;
}
.sidebar-foot a { color: var(--accent); }

.workspace {
  min-width: 0;
  padding: 28px clamp(18px, 4vw, 46px) 48px;
  animation: fadeUp .28s ease both;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.page-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 24px;
}
.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0;
  font-weight: 800;
}
.page-head h1 {
  margin: 0;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.12;
}
.model-badge {
  min-width: 180px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(18, 27, 39, .76);
}
.model-badge span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}
.model-badge strong {
  display: block;
  margin-top: 3px;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}
.metrics article, .panel {
  background: rgba(18, 27, 39, .86);
  border: 1px solid var(--line);
  border-radius: 8px;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}
.metrics article {
  padding: 18px;
}
.metrics article:hover, .panel:hover {
  border-color: rgba(49, 198, 163, .28);
}
.metrics span, .hint, .empty, .row span, .doc-link span, .status-list span, label span {
  color: var(--muted);
}
.metrics strong {
  display: block;
  margin-top: 8px;
  font-size: 28px;
}
.content-grid {
  display: grid;
  grid-template-columns: minmax(320px, .75fr) minmax(0, 1.35fr);
  gap: 16px;
}
.panel {
  padding: 18px;
}
.panel.wide { grid-column: span 1; }
.panel h2 {
  margin: 0 0 14px;
  font-size: 18px;
}
.section-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.section-title h2 { margin: 0; }
.section-title a { color: var(--accent); }
.stack, .ask-form, .list {
  display: grid;
  gap: 12px;
}
.upload-progress {
  display: grid;
  gap: 8px;
  padding: 12px;
  background: rgba(49, 198, 163, .08);
  border: 1px solid rgba(49, 198, 163, .22);
  border-radius: 8px;
}
.upload-progress[hidden] {
  display: none;
}
.progress-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 13px;
}
.progress-meta strong {
  color: var(--ink);
}
.progress-track {
  height: 10px;
  overflow: hidden;
  background: rgba(0,0,0,.26);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: 999px;
}
.progress-bar {
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #a9e8cf);
  border-radius: inherit;
  transition: width .18s ease;
}
.search-panel {
  margin-bottom: 18px;
}
.portal-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, .55fr);
  gap: 16px;
  margin-bottom: 16px;
}
.galaxy-panel {
  overflow: hidden;
}
.portal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: -2px 0 14px;
}
.portal-actions a {
  padding: 8px 11px;
  color: var(--muted);
  background: rgba(255,255,255,.035);
  border: 1px solid rgba(255,255,255,.07);
  border-radius: 999px;
  font-size: 13px;
  transition: color .18s ease, border-color .18s ease, transform .18s ease;
}
.portal-actions a:hover {
  color: var(--ink);
  border-color: rgba(49, 198, 163, .42);
  transform: translateY(-1px);
}
.galaxy-map {
  position: relative;
  min-height: 360px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  padding: 22px;
  background:
    linear-gradient(135deg, rgba(106, 167, 255, .08), transparent 30%),
    radial-gradient(circle at 16% 22%, rgba(214, 184, 108, .13), transparent 18%),
    radial-gradient(circle at center, rgba(49, 198, 163, .16), transparent 22%),
    radial-gradient(circle at center, transparent 28%, rgba(49, 198, 163, .12) 29%, transparent 30%),
    radial-gradient(circle at center, transparent 48%, rgba(255,255,255,.07) 49%, transparent 50%),
    rgba(0,0,0,.14);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: 8px;
}
.galaxy-core {
  grid-column: 2;
  min-height: 120px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 6px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(49, 198, 163, .34), rgba(49, 198, 163, .08) 68%, transparent 70%);
  text-align: center;
}
.galaxy-core strong {
  font-size: 20px;
}
.galaxy-core span {
  color: var(--muted);
  font-size: 13px;
}
.orbit-node {
  min-height: 116px;
  display: grid;
  align-content: center;
  gap: 7px;
  padding: 14px;
  background:
    linear-gradient(145deg, rgba(255,255,255,.045), rgba(255,255,255,.015)),
    rgba(18, 27, 39, .78);
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: 0 12px 30px rgba(0,0,0,.16);
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}
.orbit-node:hover {
  transform: translateY(-3px) scale(1.01);
  border-color: rgba(49, 198, 163, .5);
  background: rgba(49, 198, 163, .08);
}
.orbit-node strong {
  overflow-wrap: anywhere;
}
.orbit-node span, .orbit-node em {
  color: var(--muted);
  font-size: 13px;
  font-style: normal;
}
.node-1, .node-4 { transform: translateY(8px); }
.node-2, .node-5 { transform: translateY(-8px); }
.node-2 { border-color: rgba(106, 167, 255, .28); }
.node-3 { border-color: rgba(214, 184, 108, .28); }
.node-4 { border-color: rgba(255, 155, 143, .25); }
.overview-workbench {
  display: grid;
  grid-template-columns: minmax(300px, .62fr) minmax(0, 1.38fr);
  gap: 16px;
  align-items: start;
}
.todo-panel, .category-inspector {
  position: sticky;
  top: 18px;
}
.subtle {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}
.todo-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
}
.todo-list {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}
.todo-item {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  padding: 10px;
  background: rgba(255,255,255,.035);
  border: 1px solid var(--line);
  border-radius: 8px;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}
.todo-item:hover {
  transform: translateY(-1px);
  border-color: rgba(49, 198, 163, .42);
}
.todo-item button {
  width: 24px;
  height: 24px;
  min-height: 24px;
  padding: 0;
  color: var(--accent);
  background: transparent;
  border: 2px solid rgba(49, 198, 163, .56);
  border-radius: 50%;
}
.todo-item.done {
  background: rgba(49, 198, 163, .08);
}
.todo-item.done button {
  background: var(--accent);
  box-shadow: inset 0 0 0 4px var(--panel);
}
.todo-item.done span {
  color: var(--muted);
  text-decoration: line-through;
}
.todo-history {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}
.todo-history h3 {
  margin: 0 0 10px;
  font-size: 15px;
}
.todo-history details {
  background: rgba(255,255,255,.025);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}
.todo-history details + details {
  margin-top: 8px;
}
.todo-history summary {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 10px;
  cursor: pointer;
  list-style: none;
}
.todo-history summary::-webkit-details-marker { display: none; }
.todo-history summary span {
  color: var(--muted);
  font-size: 13px;
}
.todo-history details > div {
  display: grid;
  gap: 6px;
  padding: 0 10px 10px;
}
.todo-history p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}
.todo-history p.done {
  text-decoration: line-through;
}
.category-index-list {
  display: grid;
  gap: 10px;
}
.category-index-list details {
  background: rgba(255,255,255,.025);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}
.category-index-list summary {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 12px;
  cursor: pointer;
  list-style: none;
}
.category-index-list summary::-webkit-details-marker { display: none; }
.category-index-list summary span {
  display: flex;
  align-items: center;
  gap: 9px;
  overflow-wrap: anywhere;
}
.category-index-list summary i {
  width: 10px;
  height: 10px;
  flex: none;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 5px rgba(49, 198, 163, .09);
}
.category-index-list summary b {
  font-weight: 800;
}
.category-index-list summary strong {
  color: var(--accent);
  white-space: nowrap;
}
.category-type-line {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0 12px 10px;
}
.category-type-line em {
  padding: 4px 7px;
  color: var(--muted);
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: 999px;
  font-size: 12px;
  font-style: normal;
}
.category-type-line a {
  padding: 4px 7px;
  color: var(--accent);
  background: rgba(49, 198, 163, .08);
  border: 1px solid rgba(49, 198, 163, .16);
  border-radius: 999px;
  font-size: 12px;
}
.tree-file-list {
  display: grid;
  gap: 7px;
  padding: 0 12px 12px;
}
.tree-file-list a {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 8px;
  align-items: center;
  padding: 9px;
  background: rgba(0,0,0,.16);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: 7px;
}
.tree-file-list a:hover {
  border-color: rgba(49, 198, 163, .36);
}
.tree-file-list span {
  color: #06110f;
  background: var(--accent);
  border-radius: 5px;
  padding: 3px 5px;
  text-align: center;
  font-size: 11px;
  font-weight: 900;
}
.tree-file-list strong {
  overflow-wrap: anywhere;
  font-size: 13px;
}
.search-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px auto;
  gap: 10px;
}
.overview-title {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.file-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}
.file-card {
  min-height: 168px;
  display: grid;
  grid-template-rows: 1fr auto;
  gap: 12px;
  padding: 14px;
  background: rgba(255,255,255,.035);
  border: 1px solid var(--line);
  border-radius: 8px;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}
.file-card:hover {
  transform: translateY(-2px);
  border-color: rgba(49, 198, 163, .48);
  background: rgba(49, 198, 163, .055);
}
.file-card a:first-child {
  display: grid;
  align-content: start;
  gap: 10px;
}
.file-ext {
  width: fit-content;
  max-width: 100%;
  padding: 5px 8px;
  color: #06110f;
  background: var(--accent);
  border-radius: 6px;
  font-size: 12px;
  font-weight: 900;
}
.file-card strong {
  line-height: 1.45;
  overflow-wrap: anywhere;
}
.file-card em {
  color: var(--muted);
  font-style: normal;
  font-size: 13px;
}
.file-card nav {
  display: flex;
  gap: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
}
.file-card nav a {
  color: var(--accent);
  font-size: 14px;
}
.empty-state {
  grid-column: 1 / -1;
  min-height: 220px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 10px;
  color: var(--muted);
  background: rgba(255,255,255,.025);
  border: 1px dashed var(--line);
  border-radius: 8px;
  text-align: center;
}
.empty-state strong {
  color: var(--ink);
  font-size: 20px;
}
.empty-category-strip {
  width: min(720px, 100%);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 8px;
}
.empty-category-strip a {
  padding: 7px 10px;
  color: var(--muted);
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.07);
  border-radius: 999px;
  font-size: 13px;
}
.empty-category-strip a:hover {
  color: var(--ink);
  border-color: rgba(49, 198, 163, .35);
}
.ask-workspace {
  display: grid;
  grid-template-columns: minmax(340px, .78fr) minmax(0, 1.22fr);
  gap: 16px;
  align-items: start;
}
.ask-control-panel, .ask-result-panel {
  min-height: 520px;
}
.ask-control-panel {
  position: sticky;
  top: 18px;
}
.ask-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 14px;
}
.ask-flow span {
  min-height: 34px;
  display: grid;
  place-items: center;
  padding: 6px;
  color: var(--muted);
  background: rgba(255,255,255,.032);
  border: 1px solid rgba(255,255,255,.065);
  border-radius: 7px;
  font-size: 12px;
  text-align: center;
}
.scope-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}
.scope-card {
  display: grid;
  gap: 5px;
  padding: 12px;
  background: linear-gradient(145deg, rgba(255,255,255,.045), rgba(255,255,255,.018));
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}
.scope-card:hover {
  transform: translateY(-1px);
  border-color: rgba(49, 198, 163, .35);
}
.scope-card input {
  width: auto;
  accent-color: var(--accent);
}
.scope-card span {
  color: var(--ink);
  font-weight: 800;
}
.scope-card em {
  color: var(--muted);
  font-size: 12px;
  font-style: normal;
}
.scope-card:has(input:checked) {
  border-color: rgba(49, 198, 163, .52);
  background: rgba(49, 198, 163, .08);
}
.ask-selectors {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}
.ask-empty {
  min-height: 320px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 8px;
  color: var(--muted);
  background:
    radial-gradient(circle at 50% 30%, rgba(106, 167, 255, .1), transparent 25%),
    rgba(255,255,255,.02);
  border: 1px dashed var(--line);
  border-radius: 8px;
  text-align: center;
  padding: 18px;
}
.ask-empty strong {
  color: var(--ink);
  font-size: 20px;
}
.expand-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 14px;
  padding: 12px;
  background: rgba(214, 168, 92, .1);
  border: 1px solid rgba(214, 168, 92, .26);
  border-radius: 8px;
}
.expand-card span {
  color: #f1d39a;
  line-height: 1.5;
}
.answer, .sources {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.answer div {
  line-height: 1.8;
  color: #dce7f4;
}
.source, .doc-link, .row, .status-list p {
  background: rgba(255,255,255,.035);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.source, .doc-link {
  display: grid;
  gap: 5px;
  padding: 12px;
}
.source:hover, .doc-link:hover, .row:hover, .category-card:hover {
  border-color: rgba(49, 198, 163, .45);
  transform: translateY(-1px);
}
.row {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 12px;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}
.row-main, .row > div {
  min-width: 0;
  display: grid;
  gap: 5px;
}
.row-main {
  flex: 1;
}
.row strong { overflow-wrap: anywhere; }
.row em {
  color: var(--warn);
  font-size: 13px;
  font-style: normal;
}
.row nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}
.row form { margin: 0; }
.split-form, .user-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(170px, .5fr) auto;
  gap: 10px;
}
.user-form { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) 130px auto; }
.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 9px 7px 12px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 999px;
}
.pill button {
  min-height: 26px;
  padding: 0 8px;
  color: var(--danger);
  background: rgba(255, 123, 110, .1);
  border-color: rgba(255, 123, 110, .25);
  font-size: 12px;
}
.status-list {
  display: grid;
  gap: 10px;
}
.status-list p {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin: 0;
  padding: 12px;
}
.settings-panel {
  max-width: 680px;
}
.category-overview {
  margin-top: 18px;
}
.category-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.category-card {
  background: rgba(255,255,255,.035);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}
.category-card summary {
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 14px;
  cursor: pointer;
  list-style: none;
}
.category-card summary::-webkit-details-marker { display: none; }
.category-card summary span {
  font-weight: 800;
  overflow-wrap: anywhere;
}
.category-card summary em {
  flex: none;
  color: var(--muted);
  font-size: 13px;
  font-style: normal;
}
.category-card[open] {
  background: rgba(49, 198, 163, .06);
  border-color: rgba(49, 198, 163, .38);
}
.mini-docs {
  display: grid;
  gap: 8px;
  padding: 0 12px 12px;
  animation: reveal .18s ease both;
}
@keyframes reveal {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}
.mini-docs a {
  display: grid;
  gap: 4px;
  padding: 10px;
  background: rgba(0,0,0,.16);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: 7px;
}
.mini-docs a:hover {
  border-color: rgba(49, 198, 163, .35);
}
.mini-docs span {
  color: var(--muted);
  font-size: 13px;
}
.more-link {
  color: var(--accent);
}
.success {
  margin: 0 0 14px;
  padding: 10px 12px;
  color: #baf5dd;
  background: rgba(49, 198, 163, .12);
  border: 1px solid rgba(49, 198, 163, .28);
  border-radius: 8px;
}

.login-body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
}
.login-panel {
  width: min(420px, 100%);
  padding: 30px;
  background: rgba(18, 27, 39, .92);
  border: 1px solid var(--line);
  border-radius: 10px;
}
.login-panel h1 { margin: 0 0 20px; }
.error {
  margin: 0;
  color: var(--danger);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px clamp(16px, 4vw, 42px);
  background: var(--sidebar);
  border-bottom: 1px solid var(--line);
}
.topbar h1 { margin: 0; font-size: clamp(18px, 3vw, 26px); overflow-wrap: anywhere; }
.topbar p { margin: 5px 0 0; color: var(--muted); }
.preview-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.reader-layout {
  width: min(1380px, calc(100% - 28px));
  margin: 18px auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 16px;
  animation: fadeUp .28s ease both;
}
.reader-main, .reader-side, .reader-chunks {
  background: rgba(18, 27, 39, .86);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.reader-main {
  min-height: 68vh;
  overflow: hidden;
}
.pdf-frame {
  width: 100%;
  height: min(78vh, 900px);
  display: block;
  border: 0;
  background: #0d1520;
}
.rendered {
  min-height: 68vh;
  padding: clamp(18px, 4vw, 42px);
  line-height: 1.85;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.markdown-body {
  white-space: normal;
}
.markdown-body h1, .markdown-body h2, .markdown-body h3 {
  margin-top: 1.4em;
  line-height: 1.25;
}
.markdown-body h1:first-child, .markdown-body h2:first-child, .markdown-body h3:first-child {
  margin-top: 0;
}
.markdown-body table {
  width: 100%;
  border-collapse: collapse;
}
.markdown-body th, .markdown-body td {
  border: 1px solid var(--line);
  padding: 8px 10px;
}
.markdown-body code {
  padding: 2px 5px;
  background: rgba(255,255,255,.08);
  border-radius: 5px;
}
.markdown-body pre {
  overflow: auto;
  padding: 12px;
  background: #0d1520;
  border: 1px solid var(--line);
  border-radius: 8px;
}
.table-reader {
  max-height: 78vh;
  overflow: auto;
}
.table-reader table {
  width: 100%;
  border-collapse: collapse;
  min-width: 680px;
}
.table-reader td {
  padding: 10px 12px;
  border: 1px solid var(--line);
  vertical-align: top;
}
.table-reader tr:nth-child(odd) td {
  background: rgba(255,255,255,.025);
}
.reader-side {
  position: sticky;
  top: 18px;
  align-self: start;
  padding: 14px;
}
.reader-meta {
  display: grid;
  gap: 6px;
  padding: 12px;
  margin-bottom: 14px;
  background: rgba(49, 198, 163, .08);
  border: 1px solid rgba(49, 198, 163, .22);
  border-radius: 8px;
}
.reader-meta span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}
.reader-side h2 {
  margin: 0 0 10px;
  font-size: 16px;
}
.chunk-nav {
  display: grid;
  gap: 6px;
  max-height: 54vh;
  overflow: auto;
}
.chunk-nav a {
  padding: 9px 10px;
  color: var(--muted);
  background: rgba(255,255,255,.035);
  border: 1px solid transparent;
  border-radius: 7px;
}
.chunk-nav a:hover, .chunk-nav a.active {
  color: var(--ink);
  border-color: rgba(49, 198, 163, .35);
  background: rgba(49, 198, 163, .08);
}
.reader-chunks {
  width: min(1380px, calc(100% - 28px));
  margin: 0 auto 42px;
  padding: 14px;
  display: grid;
  gap: 12px;
}
.chunk {
  background: rgba(18, 27, 39, .86);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
}
.chunk.highlight {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(49, 198, 163, .14);
}
.chunk h2 { margin: 0 0 10px; font-size: 15px; color: var(--muted); }
.chunk p { margin: 0; line-height: 1.8; white-space: pre-wrap; overflow-wrap: anywhere; }

@media (max-width: 920px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar {
    position: static;
    height: auto;
    grid-template-rows: auto auto auto;
  }
  .nav {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .nav a { text-align: center; }
  .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .content-grid { grid-template-columns: 1fr; }
  .portal-hero { grid-template-columns: 1fr; }
  .overview-workbench { grid-template-columns: 1fr; }
  .todo-panel, .category-inspector, .ask-control-panel { position: static; }
  .galaxy-map { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .file-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .category-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .reader-layout { grid-template-columns: 1fr; }
  .reader-side { position: static; }
  .reader-main, .rendered { min-height: auto; }
  .pdf-frame { height: 70vh; }
  .page-head { flex-direction: column; }
  .model-badge { width: 100%; }
  .ask-workspace { grid-template-columns: 1fr; }
  .split-form, .user-form { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .workspace { padding: 18px 12px 34px; }
  .nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .metrics { grid-template-columns: 1fr; }
  .galaxy-map, .scope-grid { grid-template-columns: 1fr; }
  .category-grid, .search-form, .file-grid { grid-template-columns: 1fr; }
  .todo-form { grid-template-columns: 1fr; }
  .row { flex-direction: column; }
  .section-title { align-items: flex-start; flex-direction: column; }
  .topbar { align-items: flex-start; flex-direction: column; }
}