:root {
  --bg: #111315;
  --panel: #1a1d21;
  --border: #2a2f36;
  --text: #e8eaed;
  --muted: #9aa0a6;
  --accent: #5b9fd4;
  --good: #3ecf8e;
  --bad: #f07178;
  --warn: #e6b450;
  --plot-bg: #0c1018;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

.loading {
  padding: 2rem;
  color: var(--muted);
}

.error-card {
  max-width: 42rem;
  margin: 2rem auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
}
.error-card h2 {
  margin: 0 0 0.5rem;
  color: var(--bad);
  font-size: 1.05rem;
}
.error-card code {
  font-size: 0.85rem;
  color: var(--accent);
}

/* ── Sticky chrome (header + transport) ─────────────── */
.sticky-chrome {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(17, 19, 21, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

/* ── Header ─────────────────────────────────────────── */
header.app-header {
  padding: 1rem 1.5rem 0.75rem;
  background: transparent;
}

header h1 {
  margin: 0 0 0.3rem;
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-family: ui-monospace, "SF Mono", "Cascadia Code", "Segoe UI Mono", Menlo, monospace;
}

header .tagline {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  max-width: 70ch;
  line-height: 1.45;
}

/* Cross-demo links (Pages: / + /intercept/) */
.site-demos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.65rem;
  margin: 0.45rem 0 0.25rem;
  font-size: 0.8rem;
}
.site-demos-label {
  color: var(--muted);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.68rem;
}
.site-demo-link {
  color: var(--accent);
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.15rem 0.55rem;
  background: rgba(255, 255, 255, 0.03);
}
.site-demo-link:hover {
  border-color: var(--accent);
  text-decoration: none;
}
.site-demo-link.is-current {
  color: var(--text);
  border-color: var(--accent);
  background: rgba(91, 159, 212, 0.15);
  pointer-events: none;
}

.meta {
  margin-top: 0.4rem;
  font-size: 0.72rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.header-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  align-items: center;
  margin-top: 0.75rem;
}

/* Segmented control */
.seg {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg);
}
.seg button {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.4rem 0.9rem;
  cursor: pointer;
  border-right: 1px solid var(--border);
}
.seg button:last-child { border-right: none; }
.seg button:hover:not(:disabled) {
  color: var(--text);
  background: rgba(91, 159, 212, 0.08);
}
.seg button.active {
  background: rgba(91, 159, 212, 0.18);
  color: var(--accent);
  font-weight: 600;
}
.seg button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* KPI chips */
.kpi-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}
.kpi {
  display: inline-flex;
  flex-direction: column;
  gap: 0.1rem;
  padding: 0.35rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #14181e;
  min-width: 5.5rem;
}
.kpi .kpi-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}
.kpi .kpi-value {
  font-size: 1.05rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
.kpi.good .kpi-value { color: var(--good); }
.kpi.bad .kpi-value { color: var(--bad); }
.kpi.warn .kpi-value { color: var(--warn); }

.badge {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  border: 1px solid var(--border);
}
.badge.ok {
  background: rgba(62, 207, 142, 0.15);
  color: var(--good);
  border-color: rgba(62, 207, 142, 0.35);
}
.badge.miss {
  background: rgba(240, 113, 120, 0.15);
  color: var(--bad);
  border-color: rgba(240, 113, 120, 0.35);
}

.about-toggle {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
  border-radius: 6px;
  padding: 0.3rem 0.65rem;
  font-size: 0.8rem;
  cursor: pointer;
}
.about-toggle:hover { color: var(--text); border-color: var(--accent); }
.about-panel {
  margin-top: 0.75rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #14181e;
  font-size: 0.86rem;
  color: var(--muted);
  max-width: 72ch;
}
.about-panel p { margin: 0 0 0.55rem; }
.about-panel p:last-child { margin-bottom: 0; }

/* ── Story strip ─────────────────────────────────────── */
.story-strip {
  margin: 0;
  padding: 0.85rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: #14181e;
  font-size: 0.88rem;
  color: var(--muted);
}
.story-strip strong { color: var(--text); font-weight: 600; }
.story-strip .capture-eq {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  color: var(--good);
  font-size: 0.84rem;
}

/* ── Main layout ─────────────────────────────────────── */
main {
  padding: 1rem 1.5rem 2.5rem;
}

.primary-row,
.secondary-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 0.75rem;
}
@media (max-width: 960px) {
  .primary-row,
  .secondary-row { grid-template-columns: 1fr; }
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.85rem 1rem 1rem;
}
.card h2 {
  margin: 0 0 0.55rem;
  font-size: 0.92rem;
  font-weight: 600;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.85rem;
}
.card-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.65rem;
  align-items: center;
  margin-left: auto;
  font-weight: 400;
}

.plot-host {
  width: 100%;
  min-height: 320px;
  background: var(--plot-bg);
  border-radius: 8px;
  border: 1px solid var(--border);
}
.plot-host.tall { min-height: 380px; }
.plot-host.mid { min-height: 300px; }
.plot-host.hist { min-height: 280px; }

.fail-mc-note {
  color: var(--muted);
  font-size: 0.82rem;
  font-style: italic;
}

.tool-label {
  font-size: 0.72rem;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  user-select: none;
}
.tool-label input { margin: 0; }
.tool-label.transport-bands {
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #14181e;
}

/* ── Transport bar (inside sticky chrome) ────────────── */
.transport {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 0.9rem;
  align-items: center;
  padding: 0.55rem 1.5rem 0.75rem;
  margin: 0;
  background: transparent;
  border: none;
  border-top: 1px solid var(--border);
  border-radius: 0;
}

/* SOC strip in transport */
.soc-strip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-width: 7.5rem;
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
.soc-label {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.soc-pct { color: var(--text); font-weight: 600; min-width: 3.2rem; }
.soc-bar-track {
  flex: 1 1 4rem;
  height: 0.45rem;
  min-width: 3.5rem;
  border-radius: 999px;
  background: #0c1018;
  border: 1px solid var(--border);
  overflow: hidden;
}
.soc-bar-track.large {
  height: 0.85rem;
  width: 100%;
  min-width: 8rem;
}
.soc-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--good);
  border-radius: 999px;
  transition: width 0.08s linear;
}

/* Battery row */
.battery-row { margin-bottom: 0.75rem; }
.battery-grid {
  display: grid;
  grid-template-columns: minmax(8rem, 0.28fr) 1fr 1fr;
  gap: 0.85rem;
  align-items: stretch;
}
@media (max-width: 960px) {
  .battery-grid { grid-template-columns: 1fr; }
}
.soc-gauge-wrap {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.5rem 0.35rem;
}
.soc-gauge-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}
.soc-gauge-value {
  font-size: 1.65rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  color: var(--text);
}

.transport .btn {
  appearance: none;
  border: 1px solid var(--border);
  background: #14181e;
  color: var(--text);
  border-radius: 6px;
  padding: 0.4rem 0.85rem;
  font-size: 0.85rem;
  cursor: pointer;
  font-weight: 500;
}
.transport .btn:hover { border-color: var(--accent); color: var(--accent); }
.transport .btn.primary {
  background: rgba(91, 159, 212, 0.15);
  border-color: rgba(91, 159, 212, 0.4);
  color: var(--accent);
}

.scrub-wrap {
  flex: 1 1 14rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 10rem;
}
.scrub-wrap input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}
.scrub-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.readouts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.1rem;
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
.readouts span { color: var(--muted); }
.readouts strong { color: var(--text); font-weight: 600; }

.speed-seg button { padding: 0.3rem 0.55rem; font-size: 0.78rem; }

/* ── MC panel ────────────────────────────────────────── */
.mc-panel {
  margin-top: 0.25rem;
}
.mc-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1rem;
}
@media (max-width: 900px) {
  .mc-grid { grid-template-columns: 1fr; }
}

.stat-list {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.88rem;
}
.stat-list li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
}
.stat-list li span { color: var(--muted); }
.stat-list li strong {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-weight: 600;
}

.how-to {
  margin: 0.85rem 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.84rem;
  color: var(--muted);
}
.how-to li {
  position: relative;
  padding-left: 1rem;
  margin-bottom: 0.4rem;
}
.how-to li::before {
  content: "·";
  position: absolute;
  left: 0.15rem;
  color: var(--accent);
  font-weight: 700;
}

.muted-note {
  color: var(--muted);
  font-size: 0.86rem;
  margin: 0.5rem 0 0;
}

/* ── Footer ──────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 1rem 1.5rem 1.5rem;
  font-size: 0.78rem;
  color: var(--muted);
}
footer a { color: var(--accent); text-decoration: none; }
footer a:hover { text-decoration: underline; }

.hidden { display: none !important; }