/* ============================================================
   Climate · Hygrometer dashboard
   ============================================================ */

:root {
  --c-temp: #f97316;          /* orange */
  --c-temp-soft: #fed7aa;
  --c-hum:  #0ea5e9;          /* sky blue */
  --c-hum-soft:  #bae6fd;

  --font-sans: 'Geist', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono: 'Geist Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --radius-sm: 6px;
  --radius:    10px;
  --radius-lg: 14px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow:    0 4px 16px -4px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);

  --transition: 180ms cubic-bezier(.4,0,.2,1);

  /* light theme (default) */
  --bg:           #fafaf9;
  --bg-elev:     #ffffff;
  --bg-soft:     #f5f5f4;
  --border:      rgba(28, 25, 23, 0.08);
  --border-strong: rgba(28, 25, 23, 0.16);
  --text:        #1c1917;
  --text-muted:  #57534e;
  --text-faint:  #a8a29e;
  --grid:        rgba(28, 25, 23, 0.05);
}

html[data-theme="dark"],
html[data-theme="auto"] {
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  html[data-theme="auto"] {
    --bg:           #0c0a09;
    --bg-elev:     #1c1917;
    --bg-soft:     #292524;
    --border:      rgba(250, 250, 249, 0.08);
    --border-strong: rgba(250, 250, 249, 0.16);
    --text:        #fafaf9;
    --text-muted:  #a8a29e;
    --text-faint:  #57534e;
    --grid:        rgba(250, 250, 249, 0.06);
  }
}

html[data-theme="dark"] {
  --bg:           #0c0a09;
  --bg-elev:     #1c1917;
  --bg-soft:     #292524;
  --border:      rgba(250, 250, 249, 0.08);
  --border-strong: rgba(250, 250, 249, 0.16);
  --text:        #fafaf9;
  --text-muted:  #a8a29e;
  --text-faint:  #57534e;
  --grid:        rgba(250, 250, 249, 0.06);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition), color var(--transition);
}

body {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 64px;
}

h1, h2, h3, h4 {
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0;
}

/* ─────────────────────────── header ─────────────────────────── */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 0 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 28px;
}

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

.brand-mark {
  width: 26px;
  height: 26px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--c-temp) 0%, var(--c-temp) 50%, var(--c-hum) 50%, var(--c-hum) 100%);
  position: relative;
}
.brand-mark::after {
  content: '';
  position: absolute;
  inset: 4px;
  border-radius: 2px;
  background: var(--bg);
  opacity: 0.0;
}

.brand h1 {
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.header-meta {
  display: flex;
  align-items: center;
  gap: 16px;
}

.updated {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
  letter-spacing: 0.02em;
}

.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.theme-toggle:hover {
  border-color: var(--border-strong);
  color: var(--text);
}

/* ─────────────────────────── tabs ─────────────────────────── */

.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
}

.tab {
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 14px;
  cursor: pointer;
  position: relative;
  letter-spacing: -0.005em;
  transition: color var(--transition);
}
.tab:hover { color: var(--text); }
.tab.is-active {
  color: var(--text);
}
.tab.is-active::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: -1px;
  height: 2px;
  background: var(--text);
}

/* ─────────────────────────── overview ─────────────────────────── */

.panel {
  animation: fade-in 240ms ease-out;
}
@keyframes fade-in {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: none; }
}

.sensor-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-bottom: 40px;
}

.sensor-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color var(--transition), transform var(--transition);
}
.sensor-card:hover {
  border-color: var(--border-strong);
}

.sensor-card .name {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.sensor-card .current {
  display: flex;
  align-items: baseline;
  gap: 20px;
  flex-wrap: wrap;
}

.metric {
  display: flex;
  align-items: baseline;
  gap: 2px;
  font-family: var(--font-mono);
}
.metric .value {
  font-size: 32px;
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1;
}
.metric .unit {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 400;
}
.metric.temp .value { color: var(--c-temp); }
.metric.hum  .value { color: var(--c-hum); }

.sparkline-wrap {
  position: relative;
  height: 48px;
  margin-top: 4px;
}

.sensor-card .meta-row {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  margin-top: 4px;
}

/* ─────────────────────────── records ─────────────────────────── */

.records-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.record-tile {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color var(--transition);
}
.record-tile:hover { border-color: var(--border-strong); }

.record-tile .tile-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 2px;
}

.record-tile .record-divider {
  height: 1px;
  background: var(--border);
  margin: 4px 0;
}

.record-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.record-row .label {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.record-row .arrow {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1;
}

/* arrows + values are coloured by metric: temp = orange, humidity = blue */
.record-row.temp .arrow,
.record-row.temp .reading .value { color: var(--c-temp); }
.record-row.hum  .arrow,
.record-row.hum  .reading .value { color: var(--c-hum); }

.record-row .reading {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
}
.record-row .reading .value {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1;
}
.record-row .reading .when {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
}

/* ─────────────────────────── blocks ─────────────────────────── */

.block { margin-bottom: 48px; }
.block-header { margin-bottom: 16px; }
.block-header h2 {
  font-size: 18px;
  font-weight: 500;
  margin-bottom: 4px;
}
.block-sub {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0;
}

/* ─────────────────────────── stats table ─────────────────────────── */

.stats-table-wrap {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  overflow-x: auto;
}

.stats-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  min-width: 720px;
}

.stats-table th,
.stats-table td {
  padding: 10px 14px;
  text-align: left;
}
.stats-table thead th {
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.stats-table .group-head {
  text-align: center;
  border-left: 1px solid var(--border);
}
.stats-table .group-head.t-temp { color: var(--c-temp); }
.stats-table .group-head.t-hum  { color: var(--c-hum); }
.stats-table .sub-head th {
  font-weight: 400;
  font-size: 11px;
  text-transform: none;
  letter-spacing: 0;
  color: var(--text-faint);
  border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
}
.stats-table tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
.stats-table tbody tr:last-child { border-bottom: none; }
.stats-table tbody tr:hover { background: var(--bg-soft); }
.stats-table td {
  font-family: var(--font-mono);
  color: var(--text);
}
.stats-table td.sensor-name {
  font-family: var(--font-sans);
  font-weight: 500;
}
.stats-table td.num-temp { color: var(--c-temp); }
.stats-table td.num-hum  { color: var(--c-hum); }

/* ─────────────────────────── controls ─────────────────────────── */

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: flex-start;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  margin-bottom: 24px;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.control-group--sensors {
  flex: 1;
  min-width: 0;
}

.control-label {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.segmented {
  display: inline-flex;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2px;
  gap: 2px;
}

.seg {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  background: transparent;
  color: var(--text-muted);
  border: none;
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition);
}
.seg:hover { color: var(--text); }
.seg.is-active {
  background: var(--bg-elev);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

.sensor-toggles {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.sensor-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  font-family: var(--font-sans);
  transition: all var(--transition);
}
.sensor-toggle:hover {
  border-color: var(--border-strong);
  color: var(--text);
}
.sensor-toggle .swatch {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.4;
  transition: opacity var(--transition);
}
.sensor-toggle.is-active {
  background: var(--bg-elev);
  color: var(--text);
  border-color: var(--border-strong);
}
.sensor-toggle.is-active .swatch {
  opacity: 1;
}

/* ─────────────────────────── charts ─────────────────────────── */

.chart-wrap {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  position: relative;
  height: 320px;
  margin-bottom: 16px;
}
.chart-wrap--tall { height: 480px; }

.chart-wrap canvas {
  max-height: 100%;
}

/* hour-of-day picker */
.hod-controls {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

/* ─────────────────────────── footer ─────────────────────────── */

.site-footer {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12px;
  color: var(--text-faint);
}
.site-footer p { margin: 0; }
.footer-meta { font-family: var(--font-mono); }

.dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  vertical-align: middle;
  margin-right: 6px;
}

/* ─────────────────────────── responsive ─────────────────────────── */

@media (max-width: 720px) {
  body { padding: 0 16px 48px; }
  .site-header { padding: 20px 0 12px; }
  .brand h1 { font-size: 18px; }
  .controls { padding: 12px; gap: 16px; }
  .chart-wrap { padding: 12px; height: 280px; }
  .chart-wrap--tall { height: 380px; }
  .tab { padding: 10px 10px; font-size: 13px; }
  .metric .value { font-size: 26px; }
}