/* Cardia dashboard - dark instrument-panel styling, no external fonts or CDNs. */

:root {
  --bg: #05070c;
  --panel: rgba(12, 18, 30, 0.72);
  --line: rgba(120, 160, 220, 0.22);
  --text: #e8eef8;
  --muted: #7f90aa;
  --red: #ff2d46;
  --red-soft: rgba(255, 45, 70, 0.35);
  --green: #2de08a;
  --amber: #ffb02e;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

#grid {
  position: fixed;
  inset: 0;
  z-index: -1;
}

.shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 22px 20px 32px;
}

/* ------------------------------------------------------------------ topbar */
.topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.brand-mark {
  display: block;
  font-family: var(--mono);
  font-size: 1.45rem;
  letter-spacing: 0.22em;
  font-weight: 700;
}

.brand-mark .accent {
  color: var(--red);
  text-shadow: 0 0 12px var(--red-soft), 0 0 28px var(--red-soft);
}

.brand-sub {
  display: block;
  margin-top: 4px;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.ip-field {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 10px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.03);
}

.ip-field span {
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.ip-field input {
  width: 118px;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.82rem;
}

.btn {
  height: 34px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.btn:hover { border-color: var(--red-soft); background: rgba(255, 45, 70, 0.08); }
.btn[aria-pressed="true"] { border-color: var(--green); color: var(--green); }

.status {
  height: 34px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0 14px;
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1px solid currentColor;
}

.status::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 8px currentColor;
}

.status--live    { color: var(--green); }
.status--demo    { color: var(--amber); }
.status--offline { color: var(--muted); }

/* ------------------------------------------------------------------ alert */
.alert {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 18px;
  padding: 12px 16px;
  border: 1px solid var(--red-soft);
  border-radius: 10px;
  background: rgba(255, 45, 70, 0.07);
  animation: alert-pulse 1.6s ease-in-out infinite alternate;
}

@keyframes alert-pulse {
  from { box-shadow: 0 0 0 rgba(255, 45, 70, 0); }
  to   { box-shadow: 0 0 26px rgba(255, 45, 70, 0.28); }
}

.alert-icon { width: 40px; height: 40px; flex: none; }
.alert-text { display: flex; flex-direction: column; gap: 3px; font-size: 0.82rem; color: var(--muted); }
.alert-text strong { color: var(--red); font-size: 0.9rem; }

.alert-link {
  margin-left: auto;
  flex: none;
  color: var(--red);
  font-size: 0.78rem;
  text-decoration: none;
  border-bottom: 1px solid var(--red-soft);
}

/* ------------------------------------------------------------------ stage */
.stage {
  display: grid;
  gap: 18px;
  margin-top: 18px;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
}

.panel--hero {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 20px 28px;
}

.heart-wrap { flex: none; width: 160px; height: 160px; display: grid; place-items: center; }

#heart {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transform: scale(1);
  transition: transform 90ms ease-out, filter 90ms ease-out;
  filter: drop-shadow(0 0 6px rgba(255, 45, 70, 0.25));
}

#heart.beat {
  transform: scale(1.16);
  filter: drop-shadow(0 0 22px rgba(255, 45, 70, 0.75));
}

.bpm-line { display: flex; align-items: baseline; gap: 10px; }

.bpm {
  font-family: var(--mono);
  font-size: 5.4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--green);
  text-shadow: 0 0 22px rgba(45, 224, 138, 0.35);
  transition: color 0.3s, text-shadow 0.3s;
}

.bpm.out-of-range {
  color: var(--red);
  text-shadow: 0 0 22px var(--red-soft);
}

.bpm.unknown { color: var(--muted); text-shadow: none; }

.bpm-unit {
  font-family: var(--mono);
  font-size: 1rem;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.readout-sub {
  margin-top: 8px;
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

/* ------------------------------------------------------------------ chart */
.panel--chart { padding: 16px 18px 10px; }

.panel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 8px;
}

.panel-head h2 {
  margin: 0;
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 600;
}

.panel-note { font-family: var(--mono); font-size: 0.7rem; color: var(--muted); }

#wave { width: 100%; height: 220px; display: block; }

/* ------------------------------------------------------------------ groups */
.group { display: flex; flex-direction: column; gap: 10px; }

.group-title {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 700;
}

.group-title span {
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: none;
  font-size: 0.74rem;
  color: var(--muted);
}

.group-title--measured  { color: var(--green); }
.group-title--simulated { color: var(--amber); }

/* ------------------------------------------------------------------ metrics */
.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.metric {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
}

.metric-label {
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.metrics--simulated { grid-template-columns: repeat(3, 1fr); }

/* Simulated values are visually quarantined: dashed border, amber tint and a
   "sim" tag, so no reviewer can mistake them for a measurement. */
.metric--sim {
  border-style: dashed;
  border-color: rgba(255, 176, 46, 0.35);
  background: rgba(255, 176, 46, 0.04);
}

.metric--sim .metric-label em {
  font-style: normal;
  margin-left: 6px;
  padding: 1px 5px;
  border: 1px solid rgba(255, 176, 46, 0.5);
  border-radius: 4px;
  color: var(--amber);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
}

.metric--sim .metric-value { color: #c9a86a; }

.metric-value { font-family: var(--mono); font-size: 1.32rem; }
.metric-value.bad { color: var(--red); }
.metric-value.good { color: var(--green); }

/* ------------------------------------------------------------------ footer */
.footer {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  margin-top: 22px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 0.72rem;
  color: var(--muted);
}

.footer a { color: var(--muted); text-decoration: none; border-bottom: 1px solid var(--line); }
.footer a:hover { color: var(--red); }

@media (max-width: 860px) {
  .metrics, .metrics--simulated { grid-template-columns: repeat(2, 1fr); }
  .panel--hero { flex-direction: column; text-align: center; gap: 12px; }
  .bpm { font-size: 4rem; }
  .alert-link { margin-left: 0; }
}

/* keep the alert hidden until the reading is out of range */
.alert[hidden] { display: none; }