:root {
  /* light, card-based health-dashboard palette */
  --bg0: #e7ebf3;
  --bg1: #f1f4fa;
  --surface: #ffffff;
  --surface-2: #f3f5fb;
  --line: #e8ecf4;
  --text: #1d2333;
  --muted: #8a93a6;
  --muted-2: #aeb6c6;
  --good: #2fb574;
  --warn: #f5a623;
  --bad: #ef5e57;
  --sleep: #8b7ff0;
  --accent: #4f56e0;
  --accent-soft: rgba(79, 86, 224, 0.12);
  --radius: 24px;
  --shadow: 0 14px 34px rgba(40, 52, 90, 0.08);
  --track: #e8ecf4;   /* gauge track / canvas neutral (read by dashboard.js) */
  --grid: #eef1f7;    /* chart gridlines (read by dashboard.js) */
  font-synthesis: none;
}

/* dark theme — driven by the shared theme controller */
html[data-theme="dark"] {
  --bg0: #14161d;
  --bg1: #181b24;
  --surface: #21242f;
  --surface-2: #1b1e28;
  --line: #2c303c;
  --text: #e9e8f1;
  --muted: #99a1b2;
  --muted-2: #6f7787;
  --good: #45c98a;
  --warn: #f0b54a;
  --bad: #f0716a;
  --sleep: #a99cf0;
  --accent: #b3a6e0;
  --accent-soft: rgba(179, 166, 224, 0.16);
  --shadow: 0 18px 46px rgba(0, 0, 0, 0.5);
  --track: #2c303c;
  --grid: #262a35;
}
html[data-theme="dark"] body {
  background:
    radial-gradient(1200px 700px at 85% -10%, rgba(179, 166, 224, 0.1), transparent 60%),
    radial-gradient(1000px 700px at 0% 110%, rgba(127, 174, 142, 0.08), transparent 55%),
    linear-gradient(180deg, var(--bg1), var(--bg0));
}
html[data-theme="dark"] .badge-sim { background: rgba(169, 156, 240, 0.16); color: var(--sleep); border-color: rgba(169, 156, 240, 0.34); }
html[data-theme="dark"] input[type="range"]::-webkit-slider-thumb { background: var(--surface); }
html[data-theme="dark"] input[type="range"]::-moz-range-thumb { background: var(--surface); }

* { box-sizing: border-box; }

html, body { margin: 0; }

body {
  background:
    radial-gradient(1200px 700px at 85% -10%, rgba(79, 86, 224, 0.07), transparent 60%),
    radial-gradient(1000px 700px at 0% 110%, rgba(139, 127, 240, 0.08), transparent 55%),
    linear-gradient(180deg, var(--bg1), var(--bg0));
  background-attachment: fixed;
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Inter, sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  line-height: 1.45;
}

.app {
  max-width: 1120px;
  margin: 0 auto;
  padding: 26px 20px 40px;
}

/* ── top bar ─────────────────────────────────────────── */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 14px; }
.logo {
  display: grid; place-items: center;
  width: 52px; height: 52px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
}
.brand h1 { font-size: 24px; margin: 0; letter-spacing: -0.4px; }
.tag { margin: 2px 0 0; color: var(--muted); font-size: 13px; }
.status { display: flex; align-items: center; gap: 12px; }
.badge {
  font-size: 11px; font-weight: 700; letter-spacing: 0.6px;
  padding: 5px 10px; border-radius: 999px; text-transform: uppercase;
}
.badge-sim { background: rgba(139, 127, 240, 0.14); color: var(--sleep); border: 1px solid rgba(139, 127, 240, 0.3); }
.badge-live { background: rgba(47, 181, 116, 0.14); color: var(--good); border: 1px solid rgba(47, 181, 116, 0.35); }
.conn { display: flex; align-items: center; gap: 7px; font-size: 12px; color: var(--muted); }
.conn .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted-2); box-shadow: 0 0 0 0 rgba(47,181,116,0.5); }
.conn.ok .dot { background: var(--good); animation: pulse 2.4s infinite; }
.conn.off .dot { background: var(--bad); }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(47,181,116,0.4);} 70%{ box-shadow: 0 0 0 7px rgba(47,181,116,0);} 100%{ box-shadow:0 0 0 0 rgba(47,181,116,0);} }

/* ── layout grid ─────────────────────────────────────── */
.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 16px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}
.hero { grid-column: span 7; display: flex; gap: 24px; align-items: center; }
.sleep { grid-column: span 5; }
.effort { grid-column: span 5; }
.env { grid-column: span 7; }
.chart-card { grid-column: span 7; }
.drivers { grid-column: span 5; }

@media (max-width: 860px) {
  .hero, .sleep, .effort, .env, .chart-card, .drivers { grid-column: span 12; }
  .hero { flex-direction: column; text-align: center; }
}

.card-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 14px; gap: 10px; }
.card-head h2 { font-size: 13px; font-weight: 600; color: var(--muted); margin: 0; letter-spacing: 0.4px; text-transform: uppercase; }
.pct { font-size: 18px; font-weight: 700; font-variant-numeric: tabular-nums; }
.muted { color: var(--muted); font-size: 12px; }

/* ── hero / gauge ────────────────────────────────────── */
.gauge-wrap { position: relative; width: 200px; height: 200px; flex: none; }
.gauge { width: 200px; height: 200px; display: block; }
.gauge-center { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; }
.gauge-center .big { font-size: 52px; font-weight: 800; line-height: 1; font-variant-numeric: tabular-nums; letter-spacing: -1px; }
.gauge-center .unit { color: var(--muted); font-size: 12px; margin-top: 4px; }
.hero-text { flex: 1; min-width: 0; }
.eyebrow { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.6px; }
.eta { font-size: 34px; font-weight: 800; letter-spacing: -0.6px; margin: 2px 0 8px; }
.eta.ok { color: var(--good); }
.eta.soon { color: var(--bad); }
.summary { color: var(--text); opacity: 0.82; font-size: 14px; margin: 0 0 16px; }
.mini-stats { display: flex; gap: 22px; flex-wrap: wrap; }
.mini-stats span { font-size: 20px; font-weight: 700; font-variant-numeric: tabular-nums; }
.mini-stats label { display: block; color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: 0.3px; }

/* ── sleep ───────────────────────────────────────────── */
.sleep-state { font-size: 22px; font-weight: 700; margin-bottom: 14px; }
.sleep-state.awake { color: var(--accent); }
.sleep-state.winding_down { color: var(--sleep); }
.sleep-state.asleep { color: #6f63d8; }
#sleepCard.winding_down { border-color: rgba(139,127,240,0.4); }
.track { position: relative; height: 10px; background: var(--surface-2); border-radius: 999px; overflow: hidden; margin-bottom: 6px; }
.track-fill { height: 100%; width: 10%; border-radius: 999px; background: linear-gradient(90deg, var(--accent), var(--sleep)); transition: width 0.6s ease; }
.track-tick { position: absolute; top: -2px; width: 2px; height: 14px; background: rgba(29,35,51,0.12); }
.track-legend { display: flex; justify-content: space-between; color: var(--muted-2); font-size: 11px; margin-bottom: 14px; }
.signals { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 8px 16px; }
.signals li { display: flex; align-items: center; justify-content: space-between; gap: 8px; font-size: 12.5px; color: var(--muted); }
.signals .sval { flex: none; width: 58px; height: 5px; border-radius: 999px; background: var(--surface-2); overflow: hidden; }
.signals .sval i { display: block; height: 100%; background: var(--sleep); }

/* ── effort slider ───────────────────────────────────── */
input[type="range"] { -webkit-appearance: none; appearance: none; width: 100%; height: 8px; border-radius: 999px; outline: none; margin: 6px 0 8px;
  background: linear-gradient(90deg, var(--good), var(--warn) 65%, var(--bad)); }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 22px; height: 22px; border-radius: 50%; background: #fff; border: 3px solid var(--accent); box-shadow: var(--shadow); cursor: pointer; }
input[type="range"]::-moz-range-thumb { width: 20px; height: 20px; border-radius: 50%; background: #fff; border: 3px solid var(--accent); cursor: pointer; }
.effort-legend { display: flex; justify-content: space-between; color: var(--muted-2); font-size: 11px; margin-bottom: 10px; }
.hint { color: var(--muted); font-size: 12.5px; margin: 4px 0 0; }

/* ── environment tiles ───────────────────────────────── */
.env-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.tile { background: var(--surface-2); border: 1px solid var(--line); border-radius: 16px; padding: 13px 14px; }
.tile-top { display: flex; align-items: baseline; justify-content: space-between; }
.tile-label { color: var(--muted); font-size: 12px; }
.tile-val { font-size: 19px; font-weight: 700; font-variant-numeric: tabular-nums; }
.spark { width: 100%; height: 34px; display: block; margin: 6px 0 2px; }
.tile-note { font-size: 11.5px; color: var(--muted); }
.tile-note.good { color: var(--good); }
.tile-note.warn { color: var(--warn); }
.tile-note.bad { color: var(--bad); }

/* ── main chart ──────────────────────────────────────── */
.legend { display: flex; align-items: center; gap: 14px; }
.lg { font-size: 11px; color: var(--muted); display: flex; align-items: center; gap: 5px; }
.lg::before { content: ""; width: 12px; height: 3px; border-radius: 2px; }
.lg-strain::before { background: var(--warn); }
.lg-sleep::before { background: var(--sleep); }
.chart { width: 100%; height: 200px; display: block; }

/* ── drivers ─────────────────────────────────────────── */
.driver-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 12px; }
.driver-list li { display: grid; grid-template-columns: 96px 1fr 46px; align-items: center; gap: 10px; font-size: 13px; }
.driver-list .dname { color: var(--muted); }
.driver-list .dbar { height: 9px; background: var(--surface-2); border-radius: 999px; overflow: hidden; }
.driver-list .dbar i { display: block; height: 100%; border-radius: 999px; transition: width 0.5s ease; }
.driver-list .dpct { text-align: right; font-variant-numeric: tabular-nums; color: var(--text); }

/* ── footer ──────────────────────────────────────────── */
.foot { display: flex; justify-content: space-between; gap: 10px; color: var(--muted-2); font-size: 12px; margin-top: 22px; flex-wrap: wrap; }