/* LoopGain dashboard — minimal modern, dark by default. */

:root {
  color-scheme: dark light;

  --bg: #0b0d12;
  --bg-elevated: #14171f;
  --bg-elevated-2: #1c2029;
  --border: #232833;
  --border-strong: #2e3340;
  --text: #e8eaef;
  --text-dim: #9aa2b1;
  --text-faint: #6a7282;
  --accent: #6ea8fe;
  --accent-dim: #4d7fd6;

  --ok: #4ade80;
  --warn: #facc15;
  --danger: #f87171;
  --info: #818cf8;
  --neutral: #94a3b8;

  --font-sans: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", system-ui,
    sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "SF Mono", Menlo, Consolas,
    monospace;

  --radius: 8px;
  --radius-lg: 14px;
  --space: 16px;
  --space-lg: 24px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f8fa;
    --bg-elevated: #ffffff;
    --bg-elevated-2: #eef0f3;
    --border: #e0e3e8;
    --border-strong: #cdd1d8;
    --text: #1a1d22;
    --text-dim: #4f5562;
    --text-faint: #8a8f9a;
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg-elevated-2);
  padding: 0.1em 0.4em;
  border-radius: 4px;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

/* ----- Header ----- */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space) var(--space-lg);
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
}

.brand h1 {
  font-size: 1.1rem;
  margin: 0;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.brand-sub {
  color: var(--text-faint);
  font-weight: 400;
  margin-left: 6px;
}

.header-actions {
  display: flex;
  gap: 12px;
  align-items: center;
}

.status-pill {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
}
.status-pill-connected {
  background: rgba(74, 222, 128, 0.08);
  border-color: rgba(74, 222, 128, 0.3);
  color: var(--ok);
}
.status-pill-disconnected {
  background: rgba(248, 113, 113, 0.08);
  border-color: rgba(248, 113, 113, 0.3);
  color: var(--danger);
}
.status-pill-loading {
  background: rgba(129, 140, 248, 0.08);
  border-color: rgba(129, 140, 248, 0.3);
  color: var(--info);
}

/* ----- Buttons ----- */
.btn {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  padding: 6px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-elevated-2);
  color: var(--text);
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
}
.btn:hover {
  border-color: var(--border-strong);
}
.btn-primary {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: white;
}
.btn-primary:hover {
  background: var(--accent);
}
.btn-ghost {
  background: transparent;
  color: var(--text-dim);
}
.btn-ghost:hover {
  color: var(--text);
}

/* ----- Main layout ----- */
#main {
  padding: var(--space-lg);
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  gap: var(--space-lg);
}

/* ----- KPI strip ----- */
.kpi-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space);
  padding: var(--space);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.kpi {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.kpi-label {
  font-size: 0.75rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.kpi-value {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text);
}

.kpi-stack {
  font-size: 0.85rem;
  line-height: 1.3;
  font-weight: 400;
  color: var(--text-dim);
}

/* ----- Panels ----- */
.panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.panel-header {
  padding: var(--space);
  border-bottom: 1px solid var(--border);
  display: grid;
  gap: 4px;
}

.panel-header h2 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
}

.panel-sub {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.panel-controls {
  margin-top: 12px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.control {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.control input,
.control select {
  font-family: inherit;
  font-size: 0.9rem;
  padding: 5px 10px;
  background: var(--bg-elevated-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  min-width: 120px;
}

.panel-body {
  padding: var(--space);
}

/* ----- Loop Health Map ----- */
.health-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(18px, 1fr));
  gap: 4px;
  margin-bottom: 12px;
}

.health-cell {
  aspect-ratio: 1;
  border-radius: 3px;
  background: var(--bg-elevated-2);
  cursor: default;
  transition: transform 0.08s;
}
.health-cell:hover {
  transform: scale(1.15);
}
.health-cell-converged {
  background: var(--ok);
}
.health-cell-stalling {
  background: var(--warn);
}
.health-cell-oscillating {
  background: var(--danger);
  opacity: 0.6;
}
.health-cell-diverged {
  background: var(--danger);
}
.health-cell-max {
  background: var(--neutral);
}

.legend {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: var(--neutral);
  display: inline-block;
}

.legend-converged .swatch { background: var(--ok); }
.legend-stalling .swatch { background: var(--warn); }
.legend-oscillating .swatch { background: var(--danger); opacity: 0.6; }
.legend-diverged .swatch { background: var(--danger); }
.legend-max .swatch { background: var(--neutral); }

/* ----- Chart container ----- */
.chart-container {
  position: relative;
  height: 320px;
  width: 100%;
}

/* ----- Waste grid ----- */
.waste-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space);
}

.waste-card {
  background: var(--bg-elevated-2);
  border-radius: var(--radius);
  padding: var(--space);
  display: grid;
  gap: 4px;
}

.waste-card-emphasis {
  background: rgba(110, 168, 254, 0.08);
  border: 1px solid rgba(110, 168, 254, 0.3);
}

.waste-label {
  font-size: 0.75rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.waste-value {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 600;
}

/* ----- Footer ----- */
.app-footer {
  font-size: 0.8rem;
  color: var(--text-faint);
  border-top: 1px solid var(--border);
  padding-top: var(--space);
  margin-top: var(--space-lg);
}
.app-footer p {
  margin: 4px 0;
}

/* ----- Empty state ----- */
.empty-state {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: var(--bg);
  padding: var(--space);
}

.empty-state[hidden] {
  display: none;
}

.empty-state-inner {
  max-width: 480px;
  text-align: center;
  display: grid;
  gap: 16px;
}

.empty-state h2 {
  font-size: 1.3rem;
  margin: 0;
  font-weight: 600;
}

.empty-state p {
  margin: 0;
  color: var(--text-dim);
}

/* ----- Dialog ----- */
dialog {
  margin: auto;
  padding: 0;
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  max-width: 480px;
  width: 92%;
}

dialog::backdrop {
  background: rgba(0, 0, 0, 0.6);
}

#config-form {
  padding: var(--space-lg);
  display: grid;
  gap: 16px;
}

#config-form h2 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 600;
}

.dialog-help {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.dialog-field {
  display: grid;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.dialog-field input {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 8px 12px;
  background: var(--bg-elevated-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.dialog-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

.dialog-error {
  margin: 0;
  font-size: 0.85rem;
  color: var(--danger);
}

/* ----- Responsive ----- */
@media (max-width: 600px) {
  .app-header {
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }
  #main {
    padding: var(--space);
  }
  .kpi-value {
    font-size: 1.2rem;
  }
}