:root {
  --bg: #0f172a;
  --bg-card: #1e293b;
  --bg-card-2: #273449;
  --bg-input: #0b1426;
  --border: #334155;
  --border-soft: #1f2c43;
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --text-faded: #64748b;
  --accent: #3b82f6;
  --accent-soft: rgba(59, 130, 246, 0.15);
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --purple: #8b5cf6;
  --teal: #14b8a6;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

html, body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
}

/* ---------- Top bar ---------- */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  background: linear-gradient(180deg, #16213a, #0f172a);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand .logo {
  font-size: 28px;
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #1e3a8a, #3b82f6);
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(59,130,246,0.3);
}
.brand h1 { font-size: 18px; font-weight: 600; letter-spacing: -0.01em; }
.brand .tagline { font-size: 12px; color: var(--text-dim); margin-top: -2px; }

.scenario-bar { display: flex; align-items: center; gap: 8px; }
.scenario-bar label {
  font-size: 11px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.05em;
  margin-right: 4px;
}
.scenario-bar select {
  background: var(--bg-input); color: var(--text);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 7px 12px; font-size: 13px; min-width: 240px;
  font-family: inherit;
}
.scenario-bar select:hover { border-color: var(--accent); }

.btn-icon, .btn-primary, .btn-add {
  font-family: inherit; cursor: pointer;
  border: 1px solid var(--border); border-radius: 6px;
  background: var(--bg-card); color: var(--text);
  transition: all 0.15s;
}
.btn-icon { width: 32px; height: 32px; font-size: 14px; padding: 0; }
.btn-icon:hover { background: var(--bg-card-2); border-color: var(--accent); }
.btn-icon.danger:hover { border-color: var(--danger); color: var(--danger); }
.btn-primary {
  background: var(--accent); color: white; border-color: var(--accent);
  padding: 7px 14px; font-size: 13px; font-weight: 500;
}
.btn-primary:hover { background: #2563eb; }
.btn-add {
  display: block; width: 100%; padding: 8px;
  font-size: 13px; color: var(--text-dim);
  margin-top: 8px; border-style: dashed;
}
.btn-add:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- Layout ---------- */
.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 20px;
  padding: 20px 24px 40px;
  max-width: 1800px;
  margin: 0 auto;
}

/* ---------- Cards ---------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 16px;
  overflow: hidden;
}
.card summary {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  user-select: none;
  background: linear-gradient(180deg, #243149, #1e293b);
  list-style: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s;
}
.card summary::-webkit-details-marker { display: none; }
.card[open] summary { border-bottom-color: var(--border-soft); }
.card summary:hover { background: linear-gradient(180deg, #2a3a55, #1e293b); }
.card-icon { font-size: 18px; }
.card-title { font-weight: 600; font-size: 14px; }
.card-hint { color: var(--text-dim); font-size: 12px; margin-left: auto; }
.card-body { padding: 16px; }

/* ---------- Global params ---------- */
.params-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}
.param-field {
  display: flex; flex-direction: column; gap: 4px;
}
.param-field label {
  font-size: 11px; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: 0.04em;
}
.param-field .unit {
  color: var(--text-faded); font-size: 11px; text-transform: none; letter-spacing: 0; font-weight: normal;
  margin-left: 4px;
}
.param-field input {
  background: var(--bg-input);
  border: 1px solid var(--border-soft);
  color: var(--text);
  padding: 7px 10px; border-radius: 5px;
  font-family: var(--mono); font-size: 13px;
  text-align: right;
}
.param-field input:focus { outline: none; border-color: var(--accent); background: #0d1830; }
.param-tooltip {
  font-size: 11px; color: var(--text-faded); margin-top: 2px;
}

/* ---------- Catalog tables ---------- */
.catalog-table { width: 100%; border-collapse: collapse; }
.catalog-table th, .catalog-table td {
  padding: 6px 8px; text-align: left; font-size: 13px;
  border-bottom: 1px solid var(--border-soft);
}
.catalog-table th {
  font-size: 11px; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: 0.04em; font-weight: 500;
}
.catalog-table tbody tr:hover { background: var(--bg-card-2); }
.catalog-table input, .catalog-table select {
  width: 100%;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text);
  padding: 4px 6px; border-radius: 4px;
  font-family: inherit; font-size: 13px;
}
.catalog-table input:hover, .catalog-table select:hover { border-color: var(--border); }
.catalog-table input:focus, .catalog-table select:focus { outline: none; border-color: var(--accent); background: var(--bg-input); }
.catalog-table input[type="number"] { font-family: var(--mono); text-align: right; }
.catalog-table .col-action { width: 32px; text-align: center; }
.btn-row-del {
  background: none; border: none; color: var(--text-faded); cursor: pointer;
  font-size: 16px; padding: 2px 6px; border-radius: 4px;
}
.btn-row-del:hover { color: var(--danger); background: rgba(239,68,68,0.1); }

/* ---------- Segments tree ---------- */
.segment {
  background: var(--bg-card-2);
  border: 1px solid var(--border-soft);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  margin-bottom: 14px;
  overflow: hidden;
}
.segment-header {
  display: flex; align-items: flex-end; gap: 14px;
  padding: 14px;
  background: linear-gradient(90deg, rgba(59,130,246,0.08), transparent);
}
.seg-field { display: flex; flex-direction: column; gap: 4px; }
.seg-field label {
  font-size: 10px; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: 0.05em;
  font-weight: 500;
}
.seg-field-name { flex: 1; min-width: 0; }
.seg-field-users {}
.seg-field-stats { text-align: right; }

.segment-header .seg-name {
  background: var(--bg-input);
  border: 1px solid var(--border-soft);
  color: var(--text);
  font-size: 14px; font-weight: 600;
  padding: 7px 10px; border-radius: 5px;
  font-family: inherit;
  width: 100%;
}
.segment-header .seg-name:focus { outline: none; border-color: var(--accent); background: #0d1830; }

.segment-header .seg-users {
  background: var(--bg-input);
  border: 2px solid var(--accent);
  color: var(--text);
  padding: 7px 10px; border-radius: 5px;
  font-family: var(--mono); font-size: 16px; font-weight: 600;
  width: 110px; text-align: right;
  box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}
.segment-header .seg-users:focus { outline: none; border-color: #60a5fa; box-shadow: 0 0 0 4px rgba(59,130,246,0.2); }

.segment-stats {
  font-size: 12px; color: var(--text-faded);
  font-family: var(--mono);
  padding: 7px 0;
  display: inline-block;
}

.segment-queries {
  padding: 8px 14px 12px;
}
.query-row {
  display: grid;
  grid-template-columns: 1.4fr 1.2fr 70px 80px 80px;
  gap: 8px; align-items: center;
  padding: 6px 0;
  border-bottom: 1px dashed var(--border-soft);
}
.query-row:last-of-type { border-bottom: none; }
.query-row .q-name, .query-row .q-model, .query-row input {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text);
  padding: 4px 6px; border-radius: 4px;
  font-family: inherit; font-size: 13px;
  width: 100%;
}
.query-row .q-name:hover, .query-row .q-model:hover, .query-row input:hover { border-color: var(--border); }
.query-row .q-name:focus, .query-row .q-model:focus, .query-row input:focus { outline: none; border-color: var(--accent); background: var(--bg-input); }
.query-row input[type="number"] { font-family: var(--mono); text-align: right; }

.query-header {
  display: grid;
  grid-template-columns: 1.4fr 1.2fr 70px 80px 80px;
  gap: 8px; padding: 4px 0;
  font-size: 10px; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border-soft);
  margin-bottom: 4px;
}
.query-header span:nth-child(n+3) { text-align: right; }

.query-computed {
  font-family: var(--mono); font-size: 11px; color: var(--text-faded);
  text-align: right; padding: 4px 8px;
  border-top: 1px dashed var(--border-soft);
}
.query-computed strong { color: var(--accent); font-weight: 500; }

.segment-footer {
  display: flex; justify-content: space-between; align-items: center;
  padding: 6px 14px 10px;
}
.segment-footer .btn-add-q {
  background: none; border: 1px dashed var(--border);
  color: var(--text-dim); padding: 4px 10px; border-radius: 4px;
  font-size: 12px; cursor: pointer;
}
.segment-footer .btn-add-q:hover { border-color: var(--accent); color: var(--accent); }
.segment-footer .btn-del-seg {
  background: none; border: none; color: var(--text-faded);
  cursor: pointer; font-size: 13px; padding: 4px;
}
.segment-footer .btn-del-seg:hover { color: var(--danger); }

/* ---------- KPIs ---------- */
.right-panel {
  position: sticky;
  top: 80px;
  align-self: flex-start;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
}
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 16px;
}
.kpi {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
}
.kpi-primary {
  background: linear-gradient(135deg, #1e3a8a, #1e293b);
  border-color: var(--accent);
}
.kpi-label {
  font-size: 11px; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: 0.05em;
  margin-bottom: 6px;
}
.kpi-value {
  font-family: var(--mono); font-size: 22px; font-weight: 600;
  color: var(--text); line-height: 1.1;
}
.kpi-primary .kpi-value { color: #93c5fd; }
.kpi-sub {
  font-family: var(--mono); font-size: 11px; color: var(--text-faded);
  margin-top: 4px;
}

/* ---------- Tabs ---------- */
.results-tabs {
  display: flex;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px;
  margin-bottom: 12px;
}
.tab {
  flex: 1;
  background: none; border: none;
  color: var(--text-dim);
  padding: 7px; border-radius: 5px;
  font-family: inherit; font-size: 12px;
  cursor: pointer; transition: all 0.15s;
}
.tab:hover { color: var(--text); }
.tab.active { background: var(--accent); color: white; }

.results-pane {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
}

/* ---------- Result tables ---------- */
.result-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.result-table th, .result-table td { padding: 7px 8px; border-bottom: 1px solid var(--border-soft); }
.result-table th {
  font-size: 10px; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: 0.04em;
  text-align: right;
}
.result-table th:first-child, .result-table td:first-child { text-align: left; }
.result-table td { font-family: var(--mono); text-align: right; }
.result-table td:first-child { font-family: inherit; }
.result-table tfoot td {
  font-weight: 600; color: var(--accent);
  border-top: 2px solid var(--border);
  border-bottom: none;
  padding-top: 9px;
}
.result-table .name-cell { display: flex; align-items: center; gap: 8px; }
.color-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }

/* ---------- Bar chart ---------- */
.bar-chart { margin-top: 14px; }
.bar-row { margin-bottom: 8px; }
.bar-row-label {
  display: flex; justify-content: space-between;
  font-size: 11px; color: var(--text-dim); margin-bottom: 3px;
}
.bar-row-label strong { color: var(--text); font-family: var(--mono); }
.bar-row-bar {
  height: 8px; background: var(--bg-input); border-radius: 4px; overflow: hidden;
  display: flex;
}
.bar-row-bar .bar-segment { height: 100%; transition: width 0.3s; }

/* ---------- Sankey / Flow ---------- */
.flow-svg { width: 100%; height: 400px; }

/* ---------- Benchmark ---------- */
.bench-line {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-soft);
  font-size: 13px;
}
.bench-line:last-child { border-bottom: none; }
.bench-line .bench-label { flex: 1; color: var(--text-dim); }
.bench-line .bench-val { font-family: var(--mono); font-weight: 500; min-width: 100px; text-align: right; }
.bench-line .bench-ratio {
  font-family: var(--mono); font-size: 11px;
  padding: 2px 8px; border-radius: 4px;
  background: var(--bg-input); color: var(--text-dim);
}
.bench-line .bench-ratio.high { color: var(--danger); background: rgba(239,68,68,0.1); }
.bench-line .bench-ratio.mid { color: var(--warning); background: rgba(245,158,11,0.1); }
.bench-line .bench-ratio.low { color: var(--success); background: rgba(16,185,129,0.1); }

.bench-section-title {
  font-size: 11px; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: 0.05em;
  margin: 16px 0 6px;
  padding-top: 10px;
  border-top: 1px solid var(--border-soft);
}
.bench-section-title:first-of-type { margin-top: 0; padding-top: 0; border-top: none; }

/* ---------- Toast ---------- */
.toast {
  position: fixed; bottom: 24px; right: 24px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 6px; padding: 10px 16px;
  font-size: 13px; color: var(--text);
  opacity: 0; transform: translateY(10px);
  transition: all 0.2s;
  pointer-events: none;
  z-index: 100;
  box-shadow: 0 6px 24px rgba(0,0,0,0.3);
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }

/* ---------- Prompt dialog ---------- */
dialog.prompt {
  background: var(--bg-card); color: var(--text);
  border: 1px solid var(--border); border-radius: 10px;
  padding: 20px; min-width: 320px;
}
dialog.prompt::backdrop { background: rgba(0,0,0,0.5); }
dialog.prompt h3 { margin-bottom: 12px; font-size: 15px; }
dialog.prompt input {
  width: 100%; background: var(--bg-input); border: 1px solid var(--border);
  color: var(--text); padding: 8px 10px; border-radius: 5px;
  font-family: inherit; font-size: 14px; margin-bottom: 12px;
}
.prompt-actions {
  display: flex; gap: 8px; justify-content: flex-end;
}
.prompt-actions button {
  background: var(--bg-card-2); border: 1px solid var(--border);
  color: var(--text); padding: 7px 14px; border-radius: 5px;
  font-family: inherit; font-size: 13px; cursor: pointer;
}
.prompt-actions button.btn-primary { background: var(--accent); border-color: var(--accent); }

/* ---------- Mobile ---------- */
@media (max-width: 1024px) {
  .layout { grid-template-columns: 1fr; }
  .right-panel { position: static; max-height: none; }
  .topbar { flex-direction: column; gap: 12px; align-items: stretch; }
  .scenario-bar { flex-wrap: wrap; }
  .kpi-grid { grid-template-columns: 1fr 1fr; }
}