:root {
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --text-primary: #0b0b0b;
  --text-secondary: #52514e;
  --text-muted: #898781;
  --gridline: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --series-1: #2a78d6;
  --series-1-wash: rgba(42, 120, 214, 0.10);
  --series-2: #e34948;
  --series-2-wash: rgba(227, 73, 72, 0.10);
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #0d0d0d;
    --surface: #1a1a19;
    --text-primary: #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted: #898781;
    --gridline: #2c2c2a;
    --axis: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --series-1: #3987e5;
    --series-1-wash: rgba(57, 135, 229, 0.14);
    --series-2: #e66767;
    --series-2-wash: rgba(230, 103, 103, 0.14);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}

.page {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 20px 64px;
}

header h1 {
  font-size: 22px;
  font-weight: 600;
  margin: 0 0 4px;
}

header .subtitle {
  color: var(--text-secondary);
  font-size: 14px;
  margin: 0 0 24px;
}

.last-reading {
  font-size: 13px;
  color: var(--text-secondary);
  margin: 0 0 12px;
}

.metric-section {
  margin-bottom: 32px;
}

.indicator-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  margin-bottom: 12px;
}

.indicator-card.tone-blue {
  background: var(--series-1-wash);
}

.indicator-card.tone-red {
  background: var(--series-2-wash);
}

.indicator-row {
  display: flex;
  align-items: center;
}

.indicator-item {
  flex: 1;
  text-align: center;
}

.indicator-sep {
  width: 1px;
  align-self: stretch;
  background: var(--border);
  margin: 2px 20px;
}

.indicator-label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.indicator-value {
  font-size: 21px;
  font-weight: 600;
  font-variant-numeric: proportional-nums;
}

.indicator-value.enhanced {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-weight: 700;
}

.tone-blue .indicator-value.enhanced {
  background: var(--series-1);
  color: #ffffff;
}

.tone-red .indicator-value.enhanced {
  background: var(--series-2);
  color: #ffffff;
}

.filter-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}

.filter-row button {
  font: inherit;
  font-size: 13px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-secondary);
  cursor: pointer;
}

.filter-row button:hover {
  background: var(--gridline);
}

.filter-row[data-chart="level"] button.active {
  background: var(--series-1);
  border-color: var(--series-1);
  color: #ffffff;
}

.filter-row[data-chart="battery"] button.active {
  background: var(--series-2);
  border-color: var(--series-2);
  color: #ffffff;
}

.filter-row .spacer {
  flex: 1;
}

.filter-row .table-toggle {
  font-size: 13px;
  color: var(--text-secondary);
  background: none;
  border: none;
  text-decoration: underline;
  cursor: pointer;
  padding: 6px 4px;
}

.chart-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
}

.chart-canvas-wrap {
  position: relative;
  width: 100%;
  height: 340px;
}

.chart-canvas-wrap.secondary {
  height: 140px;
}

.empty-state {
  color: var(--text-muted);
  font-size: 14px;
  padding: 48px 0;
  text-align: center;
}

table.readings-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

table.readings-table th,
table.readings-table td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--gridline);
  font-variant-numeric: tabular-nums;
}

table.readings-table th {
  color: var(--text-secondary);
  font-weight: 500;
  font-variant-numeric: normal;
}

.table-scroll {
  max-height: 420px;
  overflow: auto;
}

footer {
  margin-top: 32px;
  font-size: 12px;
  color: var(--text-muted);
}