:root {
  --sidebar-w: 279px;
  --bg: #f1f5f9;
  --panel: #fff;
  --border: rgba(148, 163, 184, 0.28);
  --text: #0f172a;
  --muted: #64748b;
  --accent: #4f46e5;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.demo-top {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}

.demo-top h1 { margin: 0; font-size: 14px; font-weight: 700; }
.demo-top p { margin: 2px 0 0; font-size: 12px; color: var(--muted); }
.demo-top a { font-size: 12px; font-weight: 600; color: var(--accent); text-decoration: none; }

.demo-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 24px 16px 40px;
}

.sidebar-mock {
  width: var(--sidebar-w);
  height: min(520px, calc(100vh - 120px));
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: var(--panel);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.12);
  font-size: 12px;
}

.ctx-agent-fade {
  flex: 0 0 auto;
  height: 56px;
  background: linear-gradient(135deg, #c7d2fe 0%, #e9d5ff 55%, #fbcfe8 100%);
  border-bottom: 1px solid var(--border);
  position: relative;
}

.ctx-agent-fade::after {
  content: "↑ agent hero (сверху, вне фокуса)";
  position: absolute;
  left: 10px;
  bottom: 6px;
  font-size: 9px;
  font-weight: 600;
  color: rgba(71, 85, 105, 0.75);
  letter-spacing: 0.02em;
}

.panel-zone {
  flex: 0 0 auto;
  border-bottom: 1px solid var(--border);
  background: #fafbfc;
}

.panel-zone--menu-only {
  background: var(--panel);
}

.size-badge {
  margin: 0;
  padding: 6px 10px;
  border-radius: 999px;
  background: #eef2ff;
  border: 1px solid #c7d2fe;
  color: #3730a3;
  font-size: 11px;
  font-weight: 600;
}

.panel-tree {
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
  padding: 6px 10px 10px 12px;
}

.panel-tree ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.panel-tree li ul { padding-left: 14px; }

.panel-tree-node {
  display: flex;
  align-items: center;
  gap: 4px;
  min-height: 26px;
  padding: 2px 4px;
  border-radius: 6px;
  color: #334155;
}

.panel-tree-node.is-active {
  background: #eef2ff;
  color: #1e3a8a;
}

.panel-tree-toggle {
  width: 16px;
  border: 0;
  background: transparent;
  color: #94a3b8;
  cursor: pointer;
  padding: 0;
  font-size: 10px;
}

.panel-tree-badge {
  margin-left: auto;
  font-size: 10px;
  color: #94a3b8;
}

/* ── shared controls ── */

.tools-slab {
  padding: 8px 12px;
  box-sizing: border-box;
}

.tools-row {
  display: flex;
  align-items: center;
  gap: 6px;
  width: 100%;
  min-width: 0;
}

.view-cluster {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  align-items: stretch;
  height: 28px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  overflow: hidden;
}

.view-btn {
  flex: 1 1 0;
  min-width: 0;
  border: 0;
  background: transparent;
  font: inherit;
  font-size: 13px;
  color: #64748b;
  cursor: pointer;
}

.view-btn + .view-btn { border-left: 1px solid var(--border); }
.view-btn.is-active {
  background: linear-gradient(180deg, #dbeafe 0%, #bfdbfe 100%);
  color: #1e3a8a;
}

.tool-btn {
  flex: 0 0 28px;
  width: 28px;
  height: 28px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  font-size: 13px;
  line-height: 1;
  color: #64748b;
  cursor: pointer;
}

.tool-btn.is-active {
  border-color: #6366f1;
  background: #eef2ff;
  color: #3730a3;
}

.index-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: 8px;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  font-size: 11px;
  color: #475569;
}

.index-row button {
  border: 0;
  background: transparent;
  font: inherit;
  color: #4f46e5;
  cursor: pointer;
  font-weight: 600;
}

.before-tree {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 8px 12px 0;
  box-sizing: border-box;
}

.search-wrap { width: 100%; min-width: 0; }

.search-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  min-height: 34px;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel);
}

.search-bar:focus-within {
  border-color: #93c5fd;
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.12);
}

.search-input {
  flex: 1 1 auto;
  min-width: 0;
  border: 0;
  background: transparent;
  font: inherit;
  font-size: 12px;
  color: var(--text);
  outline: none;
}

.search-input::placeholder { color: #94a3b8; }

.search-icon { color: #94a3b8; font-size: 12px; }

.inline-tools {
  display: none;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.inline-tools .tool-btn {
  width: 26px;
  height: 26px;
  flex-basis: 26px;
  font-size: 12px;
}

.overflow-btn {
  display: none;
  flex: 0 0 28px;
  width: 28px;
  height: 28px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  font-size: 16px;
  line-height: 1;
  color: #64748b;
  cursor: pointer;
}

.trailing-tools {
  display: none;
  align-items: center;
  gap: 2px;
  margin-left: 4px;
  padding-left: 4px;
  border-left: 1px solid var(--border);
}

.trailing-tools .tool-btn {
  width: 24px;
  height: 24px;
  flex-basis: 24px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  font-size: 12px;
}

.capsule-zone {
  display: none;
  padding: 6px 10px;
}

.search-capsule {
  display: flex;
  align-items: center;
  gap: 6px;
  min-height: 34px;
  padding: 0 6px 0 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #f8fafc;
}

.search-capsule .search-input { font-size: 11px; }

.capsule-tools {
  display: flex;
  gap: 2px;
  padding: 2px;
  border-radius: 999px;
  background: var(--panel);
  border: 1px solid var(--border);
}

.capsule-tools .tool-btn {
  width: 24px;
  height: 24px;
  flex-basis: 24px;
  border: 0;
  border-radius: 999px;
  background: transparent;
}

.band-toggle {
  display: none;
  width: 100%;
  margin: 0;
  padding: 9px 12px;
  border: 0;
  background: linear-gradient(135deg, #f59e0b 0%, #fbbf24 55%, #fcd34d 100%);
  color: #78350f;
  font: inherit;
  font-size: 12px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}

.band-toggle-main {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.band-chevron {
  width: 8px;
  height: 8px;
  border-right: 2px solid rgba(120, 53, 15, 0.82);
  border-bottom: 2px solid rgba(120, 53, 15, 0.82);
  transform: rotate(-45deg);
  transition: transform 0.15s ease;
  margin-top: -1px;
}

.band-body {
  display: none;
  padding: 8px 10px 10px;
  border-bottom: 1px solid rgba(251, 191, 36, 0.45);
  background: linear-gradient(180deg, #fffbeb 0%, #fef3c7 100%);
}

.band-body.is-open { display: block; }

.band-toggle[aria-expanded="true"] .band-chevron {
  transform: rotate(45deg);
  margin-top: -3px;
}

.chip-in-search {
  display: none;
  flex: 0 0 auto;
  padding: 2px 7px;
  border-radius: 999px;
  border: 1px solid #c7d2fe;
  background: #eef2ff;
  font-size: 10px;
  font-weight: 600;
  color: #3730a3;
}

.dense-two-line {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 6px 10px 8px;
}

.dense-two-line .view-cluster { height: 26px; }
.dense-two-line .search-bar { min-height: 30px; border-radius: 8px; }
.dense-two-line .tool-btn { width: 26px; height: 26px; flex-basis: 26px; }

.micro-zone .tools-slab { padding: 4px 8px; }
.micro-zone .view-cluster { height: 24px; border-radius: 6px; }
.micro-zone .view-btn { font-size: 11px; }
.micro-zone .tool-btn { width: 24px; height: 24px; flex-basis: 24px; font-size: 11px; border-radius: 6px; }
.micro-zone .index-row { margin-top: 4px; padding: 4px 6px; font-size: 10px; }
.micro-zone .before-tree { padding: 4px 8px 0; gap: 4px; }
.micro-zone .search-bar { min-height: 30px; border-radius: 8px; }

.unified-zone .tools-slab {
  padding-bottom: 0;
  border-bottom: 0;
  background: var(--panel);
}

.unified-zone .before-tree {
  padding-top: 0;
  gap: 6px;
  background: var(--panel);
}

/* ── variant visibility ── */

.panel--m01 .layout-current { display: block; }
.panel--m02 .layout-single-row { display: block; }
.panel--m03 .layout-overflow { display: block; }
.panel--m04 .layout-current { display: block; }
.panel--m05 .layout-current { display: block; }
.panel--m06 .layout-trailing { display: block; }
.panel--m07 .layout-capsule { display: block; }
.panel--m08 .layout-band { display: block; }
.panel--m09 .layout-search-only { display: block; }
.panel--m10 .layout-dense { display: block; }

.layout-current,
.layout-single-row,
.layout-overflow,
.layout-trailing,
.layout-capsule,
.layout-band,
.layout-search-only,
.layout-dense { display: none; }

.panel--m02 .tools-slab--separate,
.panel--m03 .tools-slab--separate,
.panel--m06 .tools-slab--separate,
.panel--m07 .tools-slab--separate,
.panel--m08 .tools-slab--separate,
.panel--m09 .tools-slab--separate,
.panel--m10 .tools-slab--separate { display: none; }

.panel--m02 .before-tree--separate { display: none; }
.panel--m03 .before-tree--separate { display: none; }
.panel--m06 .before-tree--separate { display: none; }
.panel--m07 .before-tree--separate { display: none; }
.panel--m08 .before-tree--separate { display: none; }
.panel--m09 .before-tree--separate { display: none; }
.panel--m10 .before-tree--separate { display: none; }

.panel--m02 .inline-tools,
.panel--m10 .inline-tools { display: flex; }

.panel--m02 .before-tree--merged {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
}

.panel--m02 .before-tree--merged .search-wrap { flex: 1; }
.panel--m02 .before-tree--merged .search-bar { min-height: 32px; }

.panel--m03 .before-tree--overflow {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
}

.panel--m03 .overflow-btn { display: inline-flex; align-items: center; justify-content: center; }
.panel--m03 .before-tree--overflow .search-wrap { flex: 1; }

.panel--m06 .before-tree--trailing {
  display: block;
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
}

.panel--m06 .trailing-tools { display: flex; }

.panel--m07 .capsule-zone { display: block; border-bottom: 1px solid var(--border); }
.panel--m07 .capsule-tools { display: flex; }

.panel--m08 .band-toggle { display: flex; align-items: center; }
.panel--m08 .band-body.is-open { display: block; }

.panel--m09 .before-tree--search-only {
  display: block;
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
}

.panel--m09 .chip-in-search { display: inline-flex; }

.panel--m10 .dense-two-line { display: flex; }

.panel-hint {
  margin: 8px 12px 0;
  font-size: 10px;
  color: #94a3b8;
  line-height: 1.35;
}