:root {
  --bg-deep: #0a0a0c;
  --surface-page: #0f0f12;
  --surface-card: #141416;
  --surface-elevated: #1a1a1e;
  --outline-subtle: #334155;
  --on-surface: #e2e8f0;
  --on-surface-muted: #94a3b8;
  --accent-amber: #f59e0b;
  --accent-green: #10b981;
  --accent-blue: #3b82f6;
  --accent-slate: #64748b;
  --accent-red: #ef4444;
  --chart-pv: #f59e0b;
  --chart-pv-fill: rgba(245, 158, 11, 0.22);
  --chart-load: #3b82f6;
  --chart-load-fill: rgba(59, 130, 246, 0.18);
  --chart-grid: rgba(148, 163, 184, 0.15);
  font-family: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--surface-page);
  color: var(--on-surface);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.inline-code {
  font-family: ui-monospace, monospace;
  font-size: 0.85em;
  background: var(--surface-elevated);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

/* Loading */
.dashboard-loading-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-deep);
}

/* Our display:flex above beats the native hidden="" hint — force hidden elements off-screen */
[hidden] {
  display: none !important;
}

.dashboard-loading-inner {
  text-align: center;
}

.dashboard-loading-title {
  font-size: 1.125rem;
  margin: 0 0 0.5rem;
}

.dashboard-loading-sub {
  margin: 0;
  color: var(--on-surface-muted);
  font-size: 0.875rem;
}

/* Shell */
.dashboard {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.dashboard-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem 2rem;
  width: 100%;
}

.api-banner {
  padding: 0.65rem 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  font-size: 0.875rem;
}

.api-banner--warn {
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.35);
  color: #fcd34d;
}

.api-banner--err {
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: #fca5a5;
}

.api-banner--info {
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: var(--on-surface);
}

/* Header */
.app-header {
  margin-bottom: 1.25rem;
}

.header-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.dash-title {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.header-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.serial-pill {
  font-size: 0.75rem;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  background: var(--surface-card);
  border: 1px solid var(--outline-subtle);
  color: var(--on-surface-muted);
}

.serial-pill--muted {
  opacity: 0.9;
}

.online-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.35);
  color: #6ee7b7;
}

.online-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 8px #34d399;
}

.hdr-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1px solid var(--outline-subtle);
  background: var(--surface-card);
  color: var(--on-surface-muted);
  cursor: pointer;
}

.hdr-icon-btn:hover {
  color: var(--on-surface);
  border-color: var(--on-surface-muted);
}

/* Panels */
.dashboard-content {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.top-panels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 1024px) {
  .top-panels {
    grid-template-columns: 1.35fr 1fr;
    align-items: stretch;
  }
}

.panel {
  background: var(--surface-card);
  border: 1px solid var(--outline-subtle);
  border-radius: 12px;
  padding: 1.25rem;
}

.panel-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.panel-head--chart {
  margin-bottom: 0.75rem;
}

.panel-title {
  margin: 0 0 0.25rem;
  font-size: 1rem;
  font-weight: 600;
}

.panel-title--solo {
  margin-bottom: 1rem;
}

.panel-sub {
  margin: 0;
  font-size: 0.8rem;
  color: var(--on-surface-muted);
}

.total-kw-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.35);
  color: var(--accent-amber);
}

/* Flow diagram */
.flow-diagram-wrap {
  border-radius: 10px;
  background: var(--bg-deep);
  border: 1px solid var(--outline-subtle);
  overflow: hidden;
}

.flow-diagram {
  width: 100%;
  overflow-x: auto;
}

.flow-svg {
  display: block;
  width: 100%;
  max-width: 420px;
  margin: 0 auto;
  height: auto;
}

.flow-hub {
  fill: var(--surface-elevated);
  stroke: var(--outline-subtle);
  stroke-width: 1;
}

.flow-hub-label {
  fill: var(--on-surface-muted);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.flow-orb {
  stroke: rgba(255, 255, 255, 0.06);
  stroke-width: 1;
}

.flow-orb-ring--amber {
  fill: none;
  stroke: rgba(245, 158, 11, 0.45);
  stroke-width: 1.5;
}

.flow-orb-ring--green {
  fill: none;
  stroke: rgba(16, 185, 129, 0.45);
  stroke-width: 1.5;
}

.flow-orb-ring--blue {
  fill: none;
  stroke: rgba(59, 130, 246, 0.45);
  stroke-width: 1.5;
}

.flow-orb-ring--slate {
  fill: none;
  stroke: rgba(100, 116, 139, 0.45);
  stroke-width: 1.5;
}

.flow-orb-glow {
  opacity: 0.35;
}

.flow-orb-glow--amber {
  fill: rgba(245, 158, 11, 0.15);
}

.flow-orb-glow--green {
  fill: rgba(16, 185, 129, 0.12);
}

.flow-orb-glow--blue {
  fill: rgba(59, 130, 246, 0.12);
}

.flow-orb-glow--slate {
  fill: rgba(100, 116, 139, 0.1);
}

.flow-glyph {
  stroke: currentColor;
}

.flow-glyph--amber {
  color: var(--accent-amber);
}

.flow-glyph--green {
  color: var(--accent-green);
}

.flow-glyph--blue {
  color: var(--accent-blue);
}

.flow-glyph--slate {
  color: var(--accent-slate);
}

.flow-orb-title {
  fill: var(--on-surface-muted);
  font-size: 11px;
}

.flow-orb-stat {
  fill: var(--on-surface);
  font-size: 13px;
  font-weight: 600;
}

.flow-orb-stat--compact {
  font-size: 11px;
}

.flow-orb-sub {
  fill: var(--on-surface-muted);
  font-size: 10px;
}

.flow-link-anim {
  stroke-dashoffset: 0;
}

.flow-link-anim--idle {
  opacity: 0.35;
}

.flow-link-anim--on {
  opacity: 1;
  animation: flow-dash-marquee 1.1s linear infinite;
}

.flow-speed--fast .flow-link-anim--on {
  animation-duration: 0.55s;
}

.flow-speed--med .flow-link-anim--on {
  animation-duration: 0.85s;
}

.flow-speed--slow .flow-link-anim--on {
  animation-duration: 1.25s;
}

.flow-link-anim--rev.flow-link-anim--on {
  animation-direction: reverse;
}

@keyframes flow-dash-marquee {
  to {
    stroke-dashoffset: -22;
  }
}

.flow-hint {
  margin: 0;
  padding: 0.65rem 1rem;
  font-size: 0.75rem;
  color: var(--on-surface-muted);
  border-top: 1px solid var(--outline-subtle);
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.flow-hint-mark {
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  margin-top: 0.25rem;
  border-radius: 2px;
}

.flow-hint-mark--move {
  background: linear-gradient(90deg, var(--accent-amber), var(--accent-blue));
}

/* Instant metrics */
.instant-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

@media (min-width: 640px) {
  .instant-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.instant-card {
  background: var(--surface-elevated);
  border-radius: 10px;
  padding: 0.85rem;
  border: 1px solid var(--outline-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.instant-label {
  font-size: 0.7rem;
  color: var(--on-surface-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.instant-value {
  font-size: 1.25rem;
  font-weight: 700;
}

.instant-unit {
  font-size: 0.7rem;
  color: var(--on-surface-muted);
}

.instant-bar-track {
  height: 4px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 999px;
  margin-top: 0.25rem;
  overflow: hidden;
}

.instant-bar-fill {
  height: 100%;
  border-radius: 999px;
  transition: width 0.35s ease;
}

.instant-bar-fill--blue {
  background: var(--accent-blue);
}

.instant-bar-fill--amber {
  background: var(--accent-amber);
}

.instant-bar-fill--green {
  background: var(--accent-green);
}

.instant-bar-fill--red {
  background: var(--accent-red);
}

/* Chart */
.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.75rem;
  color: var(--on-surface-muted);
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.legend-dot--pv {
  background: var(--chart-pv);
}

.legend-dot--load {
  background: var(--chart-load);
}

.power-chart-wrap {
  position: relative;
  height: 280px;
  width: 100%;
}

.panel--chart .power-chart-wrap {
  margin-top: 0.25rem;
}

/* Telemetry strip */
.status-strip {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

@media (min-width: 768px) {
  .status-strip {
    grid-template-columns: repeat(4, 1fr);
  }
}

.status-card {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  padding: 0.85rem;
  background: var(--surface-card);
  border: 1px solid var(--outline-subtle);
  border-radius: 10px;
}

.status-body {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}

.status-label {
  font-size: 0.7rem;
  color: var(--on-surface-muted);
}

.status-value {
  font-size: 0.95rem;
  font-weight: 600;
}

.status-unit {
  margin-left: 0.25rem;
  font-weight: 500;
  font-size: 0.8rem;
  color: var(--on-surface-muted);
}

.tel-ico {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.tel-ico--green {
  color: var(--accent-green);
}

.tel-ico--blue {
  color: var(--accent-blue);
}

.tel-ico--amber {
  color: var(--accent-amber);
}

/* Footer */
.dashboard-footer {
  margin-top: 1.25rem;
  padding: 0.65rem 1rem;
  border-radius: 8px;
  font-size: 0.875rem;
}