:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-2: #111827;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --good: #4ade80;
  --warn: #facc15;
  --bad: #f87171;
  --terminal: #a78bfa;
  --border: #334155;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.header {
  padding: 12px 24px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--border);
}

.header h1 {
  margin: 0 0 8px 0;
  font-size: 18px;
  letter-spacing: 0.04em;
}

.loaders {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--muted);
}

.loaders input[type="file"] {
  color: var(--text);
}

.loaders button {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 4px;
  cursor: pointer;
}

.empty-state {
  margin-top: 8px;
  font-size: 12px;
  color: var(--muted);
}

.container {
  display: grid;
  grid-template-columns: 280px 1fr 320px;
  gap: 16px;
  padding: 16px;
}

aside h2,
.main-panel h2 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 12px 0 6px;
  color: var(--muted);
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  font-size: 12px;
  line-height: 1.5;
}

.card pre,
.card code,
.detail pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 11px;
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--panel-2);
  padding: 6px 8px;
  border-radius: 4px;
}

.kv {
  display: grid;
  grid-template-columns: max-content 1fr;
  column-gap: 12px;
  row-gap: 4px;
}

.kv dt {
  color: var(--muted);
}

.kv dd {
  margin: 0;
}

.timeline {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.step-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  min-width: 140px;
  cursor: pointer;
  font-size: 11px;
  transition: transform 80ms ease, border-color 80ms ease;
}

.step-card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.step-card.selected {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.step-card.terminal {
  border-color: var(--terminal);
}

.step-card .step-tool {
  font-weight: 600;
  color: var(--text);
}

.step-card .step-meta {
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  margin-top: 4px;
}

.cost-low { color: var(--good); }
.cost-mid { color: var(--warn); }
.cost-high { color: var(--bad); }

.hidden-until-terminal {
  opacity: 0.6;
  font-style: italic;
}

.hidden-until-terminal.revealed {
  opacity: 1;
  font-style: normal;
}

.bar-row {
  display: grid;
  grid-template-columns: 110px 1fr 50px;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.bar-row .name {
  color: var(--muted);
  font-size: 11px;
}

.bar-row .bar {
  height: 10px;
  background: var(--panel-2);
  border-radius: 3px;
  overflow: hidden;
}

.bar-row .bar > span {
  display: block;
  height: 100%;
  background: var(--accent);
}

.bar-row .val {
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-size: 11px;
}

.detail .step-detail-section {
  margin-bottom: 10px;
}

.diag-correct { color: var(--good); }
.diag-incorrect { color: var(--bad); }

@media (max-width: 1100px) {
  .container {
    grid-template-columns: 1fr;
  }
}