/* ===== CellBlock — instrument-cluster theme ===== */
:root {
  --bg: #0b0e14;
  --card-bg: #141922;
  --card-bg-raised: #1a212c;
  --border: #262e3a;
  --border-soft: #1d232e;
  --track: #232b38;
  --tick: #313b4a;
  --text: #eef1f6;
  --text-dim: #8993a6;
  --text-faint: #79839a;

  --accent: #57c7ff;
  --accent-dim: #3aa5db;
  --accent-soft: rgba(87, 199, 255, 0.12);
  --good: #3ddc97;
  --good-soft: rgba(61, 220, 151, 0.12);
  --warn: #f5a623;
  --warn-soft: rgba(245, 166, 35, 0.14);
  --danger: #ff5c5c;
  --danger-soft: rgba(255, 92, 92, 0.14);
  --info: #8b93ff;
  --info-soft: rgba(139, 147, 255, 0.12);

  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: ui-monospace, 'SF Mono', 'JetBrains Mono', Menlo, Consolas, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--font-body);
  background:
    radial-gradient(1200px 600px at 50% -10%, rgba(87, 199, 255, 0.06), transparent 60%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1rem 2rem;
}

/* Header — HUD strip */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.25rem;
}

.logo {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text);
}

.logo::before {
  content: '';
}

#status-bar {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

#connection-status {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  position: relative;
  padding-left: 0.9rem;
}

#connection-status::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--good);
  box-shadow: 0 0 6px var(--good);
}

/* Buttons */
.btn-primary {
  background: var(--accent);
  color: #071018;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  width: 100%;
  transition: filter 0.15s ease;
}

.btn-primary:hover { filter: brightness(1.08); }

.btn-secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border);
  padding: 0.55rem 1.1rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.btn-secondary:hover { border-color: var(--accent-dim); background: var(--accent-soft); }

#login-btn, #logout-btn {
  background: var(--accent);
  color: #071018;
  border: none;
  padding: 0.4rem 0.85rem;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
}

#logout-btn {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border);
}

#logout-btn:hover { color: var(--danger); border-color: var(--danger); }

/* Focus states — visible on all interactive elements */
button:focus-visible,
.collapse-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Screens */
.screen { display: none; }
.screen.active { display: block; }

/* Login Screen */
.login-card {
  text-align: center;
  padding: 3rem 1.5rem;
  max-width: 400px;
  margin: 4rem auto;
}

.login-card h1 {
  font-family: var(--font-mono);
  font-size: 1.85rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  color: var(--text);
}

.login-card p {
  color: var(--text-dim);
  margin-bottom: 1.5rem;
}

.note {
  font-size: 0.78rem !important;
  color: var(--text-faint) !important;
  margin-top: 1rem !important;
}

.manual-token {
  margin-top: 1.5rem;
  text-align: left;
}

.manual-token summary {
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.manual-token textarea {
  width: 100%;
  margin: 0.6rem 0;
  padding: 0.6rem;
  background: var(--card-bg-raised);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  resize: vertical;
}

/* Cards */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.85rem;
}

.card h3 {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Top Row */
.top-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}

@media (max-width: 600px) {
  .top-row { grid-template-columns: 1fr; }
}

/* SOC Gauge */
.soc-ring-container {
  position: relative;
  width: 180px;
  height: 180px;
  margin: 0 auto 1rem;
}

.soc-ring { width: 100%; height: 100%; }
.soc-ring #soc-circle { transition: stroke-dashoffset 0.6s ease, stroke 0.3s ease; }

.soc-tick-label {
  font-family: var(--font-mono);
  font-size: 9px;
  fill: var(--text-faint);
  text-anchor: middle;
  dominant-baseline: middle;
}

.soc-center {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.soc-number {
  font-family: var(--font-mono);
  font-size: 2.4rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  line-height: 1;
}

.soc-range {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-top: 0.3rem;
}

.charge-info { text-align: center; }

.charge-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--info-soft);
  color: var(--info);
}

.last-update {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-faint);
  margin-top: 0.6rem;
}

/* Top-level alert strip — surfaces critical info without opening any accordion */
.top-alerts {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.top-alerts .alert-item { margin-bottom: 0; }

/* Quick Stats */
.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.6rem 0.7rem;
  background: var(--card-bg-raised);
  border: 1px solid var(--border-soft);
  border-radius: 6px;
}

.stat-label {
  font-size: 0.65rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}

.vin-footer {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-faint);
  letter-spacing: 0.02em;
}

/* Health Score */
.health-score {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.3rem 0.7rem;
  border-radius: 20px;
}

.health-good { background: var(--good-soft); color: var(--good); }
.health-warn { background: var(--warn-soft); color: var(--warn); }
.health-bad { background: var(--danger-soft); color: var(--danger); }

/* Cell Data */
.cell-data {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.5rem;
  margin-top: 0.85rem;
}

.cell-stat {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.45rem 0.65rem;
  background: var(--card-bg-raised);
  border: 1px solid var(--border-soft);
  border-radius: 6px;
  font-size: 0.82rem;
}

.cell-label { color: var(--text-dim); }
.cell-val { font-family: var(--font-mono); font-weight: 600; font-variant-numeric: tabular-nums; }
.spread { color: var(--warn); }

/* Collapsible Sections */
.collapsible-section {
  margin-bottom: 0.5rem;
}

.collapse-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.75rem 1rem;
  border-radius: 6px;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.15s ease;
}

.collapse-toggle .toggle-label {
  flex: 1;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.collapse-toggle .toggle-arrow {
  color: var(--text-dim);
  font-size: 0.9rem;
}

.badge-count {
  display: none;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--danger);
  background: var(--danger-soft);
  padding: 0.1rem 0.5rem;
  border-radius: 20px;
  letter-spacing: 0;
  text-transform: none;
}

.badge-count.badge-active { display: inline-flex; }

.collapse-toggle:hover { border-color: var(--accent-dim); }

.collapse-content {
  display: none;
  padding: 1rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 6px 6px;
}

.collapse-content.open { display: block; }

/* Tire Grid */
.tire-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.tire-item {
  text-align: center;
  padding: 1rem;
  background: var(--card-bg-raised);
  border: 1px solid var(--border-soft);
  border-radius: 6px;
}

.tire-label {
  font-size: 0.68rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.tire-val {
  margin-top: 0.2rem;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.tire-item.tire-warn { background: var(--warn-soft); }
.tire-item.tire-warn .tire-val { color: var(--warn); }
.tire-item.tire-danger { background: var(--danger-soft); }
.tire-item.tire-danger .tire-val { color: var(--danger); }

/* Motor Grid */
.motor-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 600px) {
  .motor-grid { grid-template-columns: 1fr; }
}

.motor-item {
  padding: 0.85rem;
  background: var(--card-bg-raised);
  border: 1px solid var(--border-soft);
  border-left: 2px solid var(--accent-dim);
  border-radius: 6px;
}

.motor-item h4 {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.6rem;
}

.motor-stat {
  display: flex;
  justify-content: space-between;
  padding: 0.35rem 0;
  font-size: 0.85rem;
  border-bottom: 1px solid var(--border-soft);
}

.motor-stat:last-child { border-bottom: none; }
.motor-stat .label { color: var(--text-dim); }
.motor-stat .val { font-family: var(--font-mono); font-weight: 600; font-variant-numeric: tabular-nums; }

/* HVAC Grid */
.hvac-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.5rem;
}

.hvac-item {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  background: var(--card-bg-raised);
  border: 1px solid var(--border-soft);
  border-radius: 6px;
  font-size: 0.85rem;
}

.hvac-item .label { color: var(--text-dim); }
.hvac-item .val { font-family: var(--font-mono); font-weight: 600; }

/* Doors Grid */
.doors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.5rem;
}

.door-item {
  text-align: center;
  padding: 0.75rem;
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 0.85rem;
}

.door-open { background: var(--danger-soft); color: var(--danger); border-color: rgba(255, 92, 92, 0.25); }
.door-closed { background: var(--good-soft); color: var(--good); border-color: rgba(61, 220, 151, 0.2); }
.door-locked { background: var(--good-soft); color: var(--good); border-color: rgba(61, 220, 151, 0.2); }

/* Health Alerts */
.health-alerts { margin-top: 1rem; }

.alert-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  border-radius: 6px;
  margin-bottom: 0.5rem;
  font-size: 0.88rem;
}

.alert-critical { background: var(--danger-soft); color: var(--danger); }
.alert-warning { background: var(--warn-soft); color: var(--warn); }
.alert-info { background: var(--info-soft); color: var(--info); }

.alert-glyph { font-size: 0.8rem; flex-shrink: 0; }

/* GPS Grid */
.gps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.5rem;
}

.gps-item {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  background: var(--card-bg-raised);
  border: 1px solid var(--border-soft);
  border-radius: 6px;
  font-size: 0.85rem;
}

.gps-item .label { color: var(--text-dim); }
.gps-item .val { font-family: var(--font-mono); font-weight: 600; }

/* Charging Log */
.charging-log {
  font-size: 0.85rem;
  color: var(--text-dim);
}

.charging-log table { font-family: var(--font-mono); }
.charging-log th { color: var(--text-faint); text-align: left; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; font-size: 0.7rem; }
.table-scroll { overflow-x: auto; }

/* OTA Info */
.ota-info {
  font-size: 0.85rem;
  line-height: 1.9;
  color: var(--text-dim);
}

.ota-info strong { color: var(--text); font-weight: 600; }

/* Loading state */
.loading {
  animation: pulse 1.5s infinite;
  color: var(--text-dim);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* Unavailable-section note */
.unavailable-note {
  color: var(--text-dim);
  font-size: 0.85rem;
  font-style: italic;
}

/* Error state */
.error-msg {
  background: var(--danger-soft);
  border: 1px solid var(--danger);
  color: var(--danger);
  padding: 1rem;
  border-radius: 8px;
  text-align: center;
  margin: 1rem 0;
}

/* Footer bar — VIN + refresh */
#refresh-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  gap: 1rem;
}

@media (max-width: 600px) {
  #refresh-bar { flex-direction: column; gap: 0.75rem; }
}