:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1e222b;
  --line: #2a2f3a;
  --text: #e6e8ec;
  --muted: #9aa3b2;
  --accent: #4f8cff;
  --accent-2: #36c08e;
  --danger: #ff5c6c;
  --radius: 10px;
  --shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
  font-synthesis: none;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* Top bar */
.topbar {
  display: flex; align-items: center; gap: 16px;
  padding: 10px 18px; background: var(--panel); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 10;
}
.brand { font-weight: 700; letter-spacing: .2px; }
.project-meta { display: flex; align-items: center; gap: 10px; margin-left: 8px; }
.project-meta input {
  background: var(--panel-2); border: 1px solid var(--line); color: var(--text);
  padding: 6px 10px; border-radius: 8px; min-width: 220px;
}
.save-state { color: var(--muted); font-size: 12px; }
.topbar-actions { margin-left: auto; display: flex; gap: 8px; }

/* Buttons */
.btn {
  background: var(--accent); color: #fff; border: none; cursor: pointer;
  padding: 8px 14px; border-radius: 8px; font-weight: 600; font-size: 13px;
}
.btn:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; border: 1px solid var(--line); color: var(--text); }
.btn.small { padding: 6px 10px; font-size: 12px; }
.btn.tiny { padding: 3px 8px; font-size: 11px; background: var(--panel-2); border: 1px solid var(--line); color: var(--text); }
.btn.danger { background: transparent; border: 1px solid var(--danger); color: var(--danger); }

/* Layout */
.layout { display: grid; grid-template-columns: 340px 1fr; min-height: calc(100vh - 53px); }
.sidebar { border-right: 1px solid var(--line); padding: 14px; overflow-y: auto; }
.content { padding: 18px 22px; overflow-y: auto; }

.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px; margin-bottom: 14px; }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 10px; }
.panel-head h2 { font-size: 13px; text-transform: uppercase; letter-spacing: .6px; color: var(--muted); margin: 0; }
.hint { color: var(--muted); font-size: 12px; margin: 8px 2px 0; }
.hint code { background: var(--panel-2); padding: 1px 5px; border-radius: 5px; }

/* Dataset list */
.dataset-list, .cluster-list { display: flex; flex-direction: column; gap: 8px; }
.dataset-item, .cluster-item {
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 8px; padding: 9px 10px;
}
.dataset-item.active { border-color: var(--accent); }
.dataset-item .row1 { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.dataset-item .name { font-weight: 600; cursor: pointer; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dataset-item .meta { color: var(--muted); font-size: 11px; margin-top: 3px; }
.dataset-item .controls { display: flex; gap: 6px; align-items: center; margin-top: 8px; }
.dataset-item select, .dataset-item input.tag {
  background: var(--panel); border: 1px solid var(--line); color: var(--text);
  padding: 4px 6px; border-radius: 6px; font-size: 12px;
}
.icon-btn { background: none; border: none; color: var(--muted); cursor: pointer; font-size: 14px; padding: 2px 4px; }
.icon-btn:hover { color: var(--danger); }

/* Cluster list */
.cluster-item .row1 { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.cluster-item .name { font-weight: 600; cursor: pointer; }
.cluster-item .stat { color: var(--accent-2); font-variant-numeric: tabular-nums; font-weight: 600; }
.cluster-item .rulesummary { color: var(--muted); font-size: 11px; margin-top: 4px; word-break: break-word; }
.cluster-item .actions { display: flex; gap: 4px; }
.cluster-item.err { border-color: var(--danger); }
.cluster-item.sel { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, var(--panel-2)); }
.cluster-item .cl-check { display: flex; align-items: center; cursor: pointer; }
.cluster-item .cl-check input { cursor: pointer; }
.cluster-item .row1 .name { flex: 1; }
.merge-bar { display: flex; align-items: center; justify-content: space-between; gap: 8px;
  background: color-mix(in srgb, var(--accent) 14%, var(--panel-2)); border: 1px solid var(--accent);
  border-radius: 8px; padding: 7px 10px; font-size: 12px; color: var(--text); }

/* Active dataset bar */
.active-dataset-bar { color: var(--muted); font-size: 13px; margin-bottom: 12px; }
.active-dataset-bar strong { color: var(--text); }

/* Empty state */
.empty-state { text-align: center; padding: 80px 20px; color: var(--muted); }
.empty-state h1 { color: var(--text); font-size: 22px; }
.empty-state .btn { margin-top: 14px; }

/* Dashboard */
.summary-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; margin-bottom: 14px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; margin-bottom: 14px; }
.scard { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; }
.scard .label { color: var(--muted); font-size: 12px; }
.scard .value { font-size: 22px; font-weight: 700; margin-top: 4px; font-variant-numeric: tabular-nums; }
.scard .sub { color: var(--muted); font-size: 11px; margin-top: 2px; }
.charts-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.chart-card { min-height: 280px; }
.chart-card canvas { max-height: 240px; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 10px; }
.card h3 { margin: 0 0 8px; font-size: 14px; }
.card-actions { display: flex; gap: 8px; align-items: center; }
.card-actions select { background: var(--panel-2); border: 1px solid var(--line); color: var(--text); padding: 6px 8px; border-radius: 7px; }

/* Intent legend */
.intent-legend { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 10px; }
.intent-legend .legend-label { color: var(--muted); font-size: 12px; }
.intent-legend .legend-item { cursor: help; }

/* Table */
.table-wrap { max-height: 460px; overflow: auto; border: 1px solid var(--line); border-radius: 8px; }
.kw-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.kw-table th, .kw-table td { padding: 7px 10px; text-align: left; border-bottom: 1px solid var(--line); white-space: nowrap; }
.kw-table th { position: sticky; top: 0; background: var(--panel-2); z-index: 1; }
.kw-table td.num, .kw-table th.num { text-align: right; font-variant-numeric: tabular-nums; }
.kw-table tbody tr:hover { background: var(--panel-2); }
.pos { color: var(--accent-2); }
.neg { color: var(--danger); }

/* Dialog */
.dialog { border: 1px solid var(--line); background: var(--panel); color: var(--text); border-radius: var(--radius); width: min(560px, 92vw); box-shadow: var(--shadow); }
.dialog::backdrop { background: rgba(0,0,0,.55); }
.dialog h3 { margin-top: 0; }
.field { display: flex; flex-direction: column; gap: 4px; margin-bottom: 12px; }
.field span { color: var(--muted); font-size: 12px; }
.field input { background: var(--panel-2); border: 1px solid var(--line); color: var(--text); padding: 8px 10px; border-radius: 8px; }
.rule-group { margin-bottom: 12px; }
.rule-group-head { display: flex; align-items: center; justify-content: space-between; color: var(--muted); font-size: 12px; margin-bottom: 6px; }
.rules { display: flex; flex-direction: column; gap: 6px; }
.rule { display: flex; gap: 6px; align-items: center; }
.rule input.terms { flex: 1; background: var(--panel-2); border: 1px solid var(--line); color: var(--text); padding: 7px 9px; border-radius: 7px; }
.rule select { background: var(--panel-2); border: 1px solid var(--line); color: var(--text); padding: 7px; border-radius: 7px; }
.rule .icon-btn:hover { color: var(--danger); }
.dialog-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 10px; }

/* Suggestions dialog */
.dialog.wide { width: min(640px, 94vw); }
.suggest-head { margin-bottom: 10px; }
.suggest-head h3 { margin: 0 0 4px; }
.suggest-toolbar { display: flex; align-items: center; justify-content: space-between; padding: 6px 0; border-bottom: 1px solid var(--line); margin-bottom: 8px; }
.check-inline { display: flex; align-items: center; gap: 6px; color: var(--muted); font-size: 13px; cursor: pointer; }
.suggest-list { max-height: 52vh; overflow-y: auto; display: flex; flex-direction: column; gap: 6px; }
.suggest-item { display: flex; gap: 10px; align-items: flex-start; background: var(--panel-2); border: 1px solid var(--line); border-radius: 8px; padding: 9px 11px; }
.suggest-item input[type=checkbox] { margin-top: 3px; }
.suggest-item .body { flex: 1; min-width: 0; }
.suggest-item .title-row { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.suggest-item .nm { font-weight: 600; }
.suggest-item .vol { color: var(--accent-2); font-weight: 600; font-variant-numeric: tabular-nums; white-space: nowrap; }
.suggest-item .ex { color: var(--muted); font-size: 12px; margin-top: 3px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.suggest-empty { color: var(--muted); padding: 16px 4px; }
.suggest-group { font-size: 11px; text-transform: uppercase; letter-spacing: .6px; color: var(--muted); margin: 10px 2px 4px; }
.suggest-group:first-child { margin-top: 0; }

/* Intent chip */
.chip { display: inline-block; font-size: 11px; font-weight: 600; line-height: 1.6; padding: 0 7px; border-radius: 999px;
  color: var(--c, #9aa3b2); border: 1px solid color-mix(in srgb, var(--c, #9aa3b2) 45%, transparent);
  background: color-mix(in srgb, var(--c, #9aa3b2) 14%, transparent); vertical-align: middle; }

/* Toast */
.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--panel-2); border: 1px solid var(--line); color: var(--text); padding: 10px 16px; border-radius: 8px; box-shadow: var(--shadow); z-index: 50; }
.toast.err { border-color: var(--danger); }