:root {
  --bg: #090d12;
  --surface: #0d1219;
  --surface-2: #0a0f15;
  --surface-3: #111822;
  --line: #26313f;
  --line-soft: #1b2430;
  --text: #e4e9ef;
  --muted: #929dab;
  --faint: #697586;
  --accent: #6f9fe8;
  --accent-2: #9ab8df;
  --good: #6fd0a0;
  --danger: #ee7f8d;
  --amber: #d8b96e;
}

* { box-sizing: border-box; }
html { color-scheme: dark; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 14px;
}

.topbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 80;
  height: 64px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: #090d12;
  border-bottom: 1px solid var(--line);
  transition: transform .18s ease;
}
body.runtime-ready .topbar { transform: translateY(-58px); }
body.runtime-ready .topbar:hover,
body.runtime-ready .topbar:focus-within { transform: translateY(0); }
.brand-wrap { display: flex; align-items: center; min-width: 0; }
.brand { font-size: 14px; font-weight: 760; letter-spacing: -.01em; }
.subtitle { margin-top: 2px; color: var(--faint); font-size: 10px; }
.runtime-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  border: 1px solid var(--line);
  background: var(--surface-2);
  border-radius: 4px;
  padding: 6px 9px;
  font-size: 10px;
  white-space: nowrap;
}
.runtime-pill .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--amber); }
.runtime-pill.ready .dot { background: var(--good); }
.runtime-pill.error .dot { background: var(--danger); }

.shell {
  width: min(1460px, calc(100% - 40px));
  margin: 0 auto;
  padding: 94px 0 44px;
  transition: padding-top .18s ease;
}
body.runtime-ready .shell { padding-top: 34px; }

.intro {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(320px, .6fr);
  gap: 46px;
  align-items: end;
  padding: 16px 0 18px;
}
.eyebrow, .section-kicker {
  color: var(--accent-2);
  font-size: 9px;
  line-height: 1.2;
  text-transform: uppercase;
  letter-spacing: .1em;
  font-weight: 760;
}
.intro h1 {
  max-width: 900px;
  margin: 8px 0 9px;
  color: #edf1f5;
  font-size: clamp(28px, 3vw, 43px);
  line-height: 1.06;
  letter-spacing: -.038em;
  font-weight: 720;
}
.intro p { max-width: 920px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.65; }
.project-facts { margin: 0; border-top: 1px solid var(--line); }
.project-facts div { display: grid; grid-template-columns: 120px 1fr; gap: 14px; padding: 9px 0; border-bottom: 1px solid var(--line-soft); }
.project-facts dt { color: var(--faint); font-size: 10px; }
.project-facts dd { margin: 0; color: #bdc7d2; font-size: 11px; }
.reference-note {
  border-left: 2px solid #6c6041;
  background: #11120f;
  color: #bcb5a5;
  padding: 10px 12px;
  font-size: 11px;
  line-height: 1.55;
}

.tabs {
  display: flex;
  gap: 2px;
  padding: 22px 0 10px;
  overflow-x: auto;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 14px;
}
.tab {
  border: 0;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  background: transparent;
  padding: 9px 11px;
  cursor: pointer;
  font-weight: 650;
  white-space: nowrap;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--text); border-bottom-color: var(--accent); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.workspace { display: grid; grid-template-columns: 405px minmax(0, 1fr); gap: 14px; align-items: start; }
.planner-grid { grid-template-columns: 360px minmax(0, 1fr); }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 6px; }
.controls-panel { padding: 18px; position: sticky; top: 16px; }
.result-panel, .wide-panel { padding: 20px; }
.panel-title-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; margin-bottom: 16px; }
.panel-title-row h2 { margin: 0; font-size: 17px; letter-spacing: -.02em; }
.panel-title-row p { margin: 6px 0 0; }
.tag {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  background: var(--surface-2);
  color: var(--muted);
  border-radius: 4px;
  padding: 5px 7px;
  font-size: 10px;
  white-space: nowrap;
}
.tag.good { color: var(--good); border-color: #315e4a; }
.tag.bad { color: var(--danger); border-color: #643943; }

label { display: block; color: #b5bfcb; font-size: 11px; font-weight: 650; position: relative; }
select, input[type="number"] {
  width: 100%;
  margin-top: 7px;
  height: 37px;
  border: 1px solid var(--line);
  background: #0a0f15;
  color: var(--text);
  border-radius: 4px;
  padding: 0 9px;
  outline: none;
}
select:focus, input[type="number"]:focus { border-color: #5475a8; box-shadow: 0 0 0 2px rgba(84,117,168,.16); }
.unit { position: absolute; right: 9px; bottom: 11px; color: #697687; font-size: 9px; pointer-events: none; }
.field-grid { display: grid; gap: 10px; margin-bottom: 10px; }
.field-grid.two { grid-template-columns: 1fr 1fr; }
.subcontrols { margin: 12px 0 4px; padding: 12px; border: 1px solid var(--line-soft); background: #0a0f15; }
.subcontrols .section-kicker { margin-bottom: 10px; }
hr { border: 0; border-top: 1px solid var(--line-soft); margin: 17px 0; }
.section-kicker { margin-bottom: 10px; }
.hidden { display: none !important; }

button.primary, button.secondary {
  height: 40px;
  border-radius: 4px;
  font-weight: 700;
  cursor: pointer;
  transition: .12s ease;
}
button.primary { width: 100%; border: 1px solid #668fd5; background: #4f7fce; color: white; margin-top: 11px; }
button.primary:hover:not(:disabled) { background: #5b8bd8; }
button.secondary { border: 1px solid var(--line); background: #0b1016; color: #c4ccd7; }
button.secondary:hover:not(:disabled),
.mini-button:hover:not(:disabled),
.chart-expand:hover,
.chart-download:hover { border-color: #536174; background: #151b24; color: #d9e0e8; }
button:disabled { opacity: .42; cursor: not-allowed; }
.compact { width: auto !important; min-width: 178px; padding: 0 17px; margin-top: 0 !important; }
.button-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 8px; }
.action-stack { display: flex; flex-direction: column; align-items: flex-end; gap: 8px; }
.checkline { display: flex; align-items: center; gap: 7px; color: var(--muted); font-size: 10px; font-weight: 600; }
.checkline input { accent-color: var(--accent); }

.empty-state { min-height: 380px; display: grid; place-content: center; text-align: center; color: var(--muted); padding: 30px; }
.empty-state.small { min-height: 240px; }
.empty-state h3 { color: #ccd4de; margin: 0 0 6px; font-size: 15px; }
.empty-state p { max-width: 560px; margin: 0; line-height: 1.55; font-size: 12px; }
.metric-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; margin-bottom: 12px; }
.metric-grid.four { grid-template-columns: repeat(4, 1fr); }
.metric { min-height: 82px; padding: 13px; border: 1px solid var(--line-soft); background: var(--surface-2); }
.metric span { display: block; color: var(--muted); font-size: 10px; margin-bottom: 9px; }
.metric strong { font-size: 18px; letter-spacing: -.025em; }
.metric strong.metric-small { font-size: 13px; line-height: 1.35; }
.metric.emphasis { border-color: #486da4; background: #101824; }

.diagnostic-card { margin-bottom: 12px; border: 1px solid var(--line); background: #0d131b; padding: 14px; }
.diagnostic-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; }
.diagnostic-head span { color: var(--muted); font-size: 10px; text-transform: uppercase; letter-spacing: .06em; }
.diagnostic-head strong { font-size: 14px; }
.diagnostic-card p { margin: 8px 0 0; color: #b8c1cd; font-size: 12px; line-height: 1.55; }
.diagnostic-card .diagnostic-action { color: var(--muted); }
.evidence-row { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.evidence-row span { border: 1px solid var(--line-soft); background: #090e14; padding: 4px 6px; color: #8390a0; font: 10px/1.2 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

.chart-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.chart-card { border: 1px solid var(--line); background: var(--surface-2); min-height: 300px; position: relative; }
.chart-card.full { margin-top: 10px; }
.chart-head { height: 42px; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 0 12px; border-bottom: 1px solid var(--line-soft); }
.chart-title { color: #c7d0db; font-size: 11px; font-weight: 700; }
.chart-actions { display: flex; gap: 6px; }
.chart-expand, .chart-download, .mini-button { border: 1px solid var(--line); background: #0a0f15; color: var(--muted); border-radius: 3px; cursor: pointer; height: 28px; padding: 0 9px; font-size: 10px; }
.chart-body { height: 260px; padding: 10px 12px 12px; }
.chart-body.large { height: 350px; }
.chart-card.chart-expanded { position: fixed; inset: 16px; z-index: 100; background: #0a0f15; border-color: #4c596b; box-shadow: 0 0 0 9999px rgba(0,0,0,.76); min-height: 0; margin: 0; }
.chart-card.chart-expanded .chart-body { height: calc(100vh - 80px); }
body.chart-open { overflow: hidden; }
canvas { width: 100% !important; height: 100% !important; max-height: none; }

.warnings { margin-top: 10px; border-left: 3px solid #7b6840; padding: 9px 11px; background: #15140f; color: #c4bca9; font-size: 11px; line-height: 1.5; }
.muted { color: var(--muted); font-size: 12px; line-height: 1.55; }
.table-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 14px; color: #aab4c1; font-size: 11px; }
.table-toolbar > div { display: flex; gap: 6px; }
.table-wrap { overflow: auto; margin-top: 7px; border: 1px solid var(--line); }
table { width: 100%; border-collapse: collapse; font-size: 12px; min-width: 900px; }
th, td { padding: 10px 11px; text-align: right; border-bottom: 1px solid var(--line-soft); white-space: nowrap; }
th:first-child, td:first-child { text-align: left; }
th { color: #7f8b9b; font-size: 9px; text-transform: uppercase; letter-spacing: .06em; background: #090e14; position: sticky; top: 0; }
td { color: #c7d0db; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover td { background: #111821; }
.pass { color: var(--good); }
.fail { color: var(--danger); }
.best-label, .pareto-label { display: inline-block; margin-left: 7px; border: 1px solid #4a6386; color: #9ab8df; padding: 2px 5px; border-radius: 2px; font-size: 9px; text-transform: uppercase; }
.planner-note { color: var(--muted); border-left: 2px solid #445a77; padding: 7px 9px; margin-bottom: 2px; font-size: 11px; line-height: 1.5; }

.method-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.prose { padding: 22px; }
.prose h2 { font-size: 20px; margin: 8px 0 11px; }
.prose p { color: var(--muted); line-height: 1.7; font-size: 13px; }
.prose code { color: #a8bfe4; }
.formula { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; color: #b7c3d2; padding: 10px; border: 1px solid var(--line); background: #0a0f15; font-size: 11px; }
.wide-method { grid-column: 1 / -1; }
.paper-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 18px; }
.paper-grid > div { padding: 12px; border: 1px solid var(--line-soft); background: #0c1219; }
.paper-grid strong { display: block; font-size: 11px; margin-bottom: 7px; }
.paper-grid span { color: var(--muted); font-size: 10px; line-height: 1.55; display: block; }
.toast { position: fixed; right: 20px; bottom: 20px; z-index: 130; background: #17202b; border: 1px solid #465467; color: #d5dce5; padding: 9px 12px; border-radius: 4px; font-size: 11px; opacity: 0; transform: translateY(8px); pointer-events: none; transition: .16s ease; }
.toast.show { opacity: 1; transform: translateY(0); }

@media (max-width: 1100px) {
  .intro { grid-template-columns: 1fr; gap: 24px; }
  .workspace, .planner-grid { grid-template-columns: 1fr; }
  .controls-panel { position: static; }
  .metric-grid { grid-template-columns: repeat(3, 1fr); }
  .paper-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .topbar { padding: 0 15px; }
  .subtitle { display: none; }
  .runtime-pill { max-width: 170px; }
  .shell { width: calc(100% - 20px); padding-top: 88px; }
  body.runtime-ready .shell { padding-top: 20px; }
  .intro { padding-top: 10px; }
  .project-facts div { grid-template-columns: 100px 1fr; }
  .field-grid.two, .chart-grid, .method-grid { grid-template-columns: 1fr; }
  .metric-grid, .metric-grid.four { grid-template-columns: 1fr 1fr; }
  .paper-grid { grid-template-columns: 1fr; }
  .panel-title-row { flex-direction: column; }
  .arena-title-row .compact { width: 100% !important; }
  .action-stack { width: 100%; align-items: stretch; }
  .wide-method { grid-column: auto; }
  .chart-card.chart-expanded { inset: 6px; }
}