/* AirPu dashboard styles.
 *
 * Theme: light by default, dark via prefers-color-scheme, and a manual
 * override through <html data-theme="light|dark"> (set by the header toggle).
 *
 * Token contract: the original names (--bg --bg2 --bg3 --border --upper
 * --lower --tvoc-u --tvoc-l --temp-u --temp-l --wind-spd --text --muted
 * --grid) are kept and redefined per theme; other sections (e.g. the
 * filter-impact analysis) style against them.
 *   --bg   page background          --bg2  card / panel surface
 *   --bg3  inset / control surface  --border hairlines
 *   --text body text                --muted secondary text (AA on bg2)
 *   --grid chart grid lines         series: --upper --lower --tvoc-* --temp-* --wind-spd
 */

:root {
  color-scheme: light;

  --bg: #f4f6f9;
  --bg2: #ffffff;
  --bg3: #eef1f5;
  --border: #dde2ea;
  --upper: #0369a1;
  --lower: #c2410c;
  --tvoc-u: #6d28d9;
  --tvoc-l: #be185d;
  --temp-u: #047857;
  --temp-l: #65a30d;
  --wind-spd: #a16207;
  --text: #1a2233;
  --muted: #5d6879;
  --grid: #e6e9ef;

  /* additional tokens */
  --card: var(--bg2);
  --text-strong: #0b1220;
  --text-2: #3d4757;
  --accent: #0b6bcb;
  --accent-contrast: #ffffff;
  --accent-soft: rgba(11, 107, 203, 0.10);
  --good: #15803d;
  --bad: #b91c1c;
  --warn: #b45309;
  --threshold: #dc2626;
  --wind-dir: #0e7490;
  --landmark: #a16207;
  --crosshair: rgba(15, 23, 42, 0.22);
  --overlay: rgba(15, 23, 42, 0.38);
  --tooltip-bg: rgba(255, 255, 255, 0.97);
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.05), 0 1px 3px rgba(16, 24, 40, 0.06);
  --shadow-lg: 0 12px 32px rgba(16, 24, 40, 0.16), 0 2px 6px rgba(16, 24, 40, 0.08);
  --focus: 0 0 0 3px rgba(11, 107, 203, 0.35);
  --radius: 12px;

  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* Dark palette: applied by OS preference unless the user forced light,
   or when the user forced dark. Keep both blocks in sync. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0d121c;
    --bg2: #151b28;
    --bg3: #1d2433;
    --border: #2a3345;
    --upper: #38bdf8;
    --lower: #fb923c;
    --tvoc-u: #a78bfa;
    --tvoc-l: #f472b6;
    --temp-u: #34d399;
    --temp-l: #bef264;
    --wind-spd: #fbbf24;
    --text: #e3e8f0;
    --muted: #8a96aa;
    --grid: #222b3c;
    --text-strong: #f8fafc;
    --text-2: #b4bfd0;
    --accent: #38bdf8;
    --accent-contrast: #06121f;
    --accent-soft: rgba(56, 189, 248, 0.14);
    --good: #4ade80;
    --bad: #f87171;
    --warn: #fbbf24;
    --threshold: #f87171;
    --wind-dir: #7dd3fc;
    --landmark: #fbbf24;
    --crosshair: rgba(255, 255, 255, 0.22);
    --overlay: rgba(0, 0, 0, 0.62);
    --tooltip-bg: rgba(21, 27, 40, 0.97);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
    --focus: 0 0 0 3px rgba(56, 189, 248, 0.45);
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0d121c;
  --bg2: #151b28;
  --bg3: #1d2433;
  --border: #2a3345;
  --upper: #38bdf8;
  --lower: #fb923c;
  --tvoc-u: #a78bfa;
  --tvoc-l: #f472b6;
  --temp-u: #34d399;
  --temp-l: #bef264;
  --wind-spd: #fbbf24;
  --text: #e3e8f0;
  --muted: #8a96aa;
  --grid: #222b3c;
  --text-strong: #f8fafc;
  --text-2: #b4bfd0;
  --accent: #38bdf8;
  --accent-contrast: #06121f;
  --accent-soft: rgba(56, 189, 248, 0.14);
  --good: #4ade80;
  --bad: #f87171;
  --warn: #fbbf24;
  --threshold: #f87171;
  --wind-dir: #7dd3fc;
  --landmark: #fbbf24;
  --crosshair: rgba(255, 255, 255, 0.22);
  --overlay: rgba(0, 0, 0, 0.62);
  --tooltip-bg: rgba(21, 27, 40, 0.97);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
  --focus: 0 0 0 3px rgba(56, 189, 248, 0.45);
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.45;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

button { font-family: inherit; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ── Header ─────────────────────────────────────────────────────────── */

.site-header {
  padding: 20px 32px 16px;
  display: flex;
  align-items: center;
  gap: 12px 16px;
  flex-wrap: wrap;
}
.brand { min-width: 0; flex: 0 1 auto; margin-right: auto; }

h1 {
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-strong);
  line-height: 1.2;
}

h1 span { color: var(--accent); }

.subtitle {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 999px;
  font-size: 0.78rem;
  color: var(--text-2);
  box-shadow: var(--shadow);
  min-width: 0;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--muted);
  flex-shrink: 0;
}
.status-pill.is-fresh .status-dot { background: var(--good); box-shadow: 0 0 0 3px color-mix(in srgb, var(--good) 20%, transparent); }
.status-pill.is-stale .status-dot { background: var(--warn); }

.icon-btn,
.info-btn {
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text-2);
  width: 36px;
  height: 36px;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: var(--shadow);
}
.icon-btn:hover,
.info-btn:hover { color: var(--accent); border-color: var(--accent); }
.icon-btn:active { transform: translateY(1px); }

/* Sun icon shown in dark theme (click → light), moon in light theme. */
.theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-sun { display: block; }
  :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: none; }
}

/* ── Control bar ────────────────────────────────────────────────────── */

.controls {
  margin: 0 32px 16px;
  padding: 14px 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 14px 22px;
}

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

.ctrl-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Segmented control */
.btn-group {
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.btn {
  background: transparent;
  border: 0;
  color: var(--text-2);
  padding: 6px 12px;
  min-height: 30px;
  font-size: 0.82rem;
  font-weight: 500;
  border-radius: 7px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, color 0.15s, box-shadow 0.15s;
}
.btn:hover { color: var(--text-strong); background: color-mix(in srgb, var(--card) 60%, transparent); }
.btn:active { transform: translateY(1px); }
.btn.active {
  background: var(--card);
  color: var(--accent);
  font-weight: 600;
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.12), 0 0 0 1px var(--border);
}
.btn:focus-visible { outline: none; box-shadow: var(--focus); }

.date-range {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.date-range input[type="date"] {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  padding: 6px 8px;
  min-height: 38px;
  border-radius: 8px;
  min-width: 0;
}
.date-range input[type="date"]:hover { border-color: var(--muted); }
.date-range input[type="date"]:focus { outline: none; border-color: var(--accent); box-shadow: var(--focus); }
.date-range input[type="date"]::-webkit-calendar-picker-indicator { cursor: pointer; }

.date-range .date-sep,
.date-range .date-prefix {
  color: var(--muted);
  font-size: 0.8rem;
}

/* Highlight the custom-range inputs while a custom range is applied. */
#custom-range-group.is-active input[type="date"] {
  border-color: var(--accent);
  background: var(--accent-soft);
}
#custom-range-group.is-active .ctrl-label { color: var(--accent); }

.btn-clear {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--muted);
  width: 30px;
  height: 30px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.8rem;
}
.btn-clear:hover { color: var(--bad); border-color: var(--bad); }
.btn-clear[hidden] { display: none; }

.compare-controls {
  display: flex;
  align-items: center;
  gap: 8px 10px;
  flex-wrap: wrap;
}
#compare-range-picker {
  padding: 2px 4px 2px 10px;
  border-left: 2px solid var(--accent);
}

.range-summary {
  flex-basis: 100%;
  font-size: 0.8rem;
  color: var(--muted);
  padding-top: 10px;
  border-top: 1px solid var(--border);
}
.range-summary:empty { display: none; }

/* ── Dashboard grid ─────────────────────────────────────────────────── */

.dashboard {
  padding: 0 32px 32px;
  display: flex;
  flex-direction: row;
  gap: 16px;
  align-items: stretch;
}

.dashboard-right {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
}

.windrose-column {
  width: clamp(340px, 30vw, 440px);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.windrose-column > .chart-wrap { flex: 1; }

.chart-wrap {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden; /* rounded corners for stats row; tooltip is position:fixed */
}

/* Wind roses size themselves from the card (clientHeight); keep the SVG out
   of flow so it can never feed back into the card height. */
.windrose-wrap { min-height: 360px; }
.windrose-wrap > svg { position: absolute; top: 0; left: 0; }

.chart-label {
  position: absolute;
  top: 10px;
  left: 16px;
  right: 16px;
  display: flex;
  align-items: baseline;
  gap: 4px 8px;
  flex-wrap: wrap;
  pointer-events: none;
  z-index: 2;
}

.chart-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-strong);
}

.chart-unit {
  font-size: 0.78rem;
  color: var(--muted);
}

.chart-legend {
  margin-left: auto;
  display: flex;
  gap: 4px 12px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.lg {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.74rem;
  color: var(--text-2);
}
.lg::before {
  content: '';
  width: 14px;
  height: 3px;
  border-radius: 2px;
  background: var(--c);
}
.lg-dash::before {
  height: 0;
  background: none;
  border-top: 2px dashed var(--c);
}
.lg-arrow::before {
  content: '→';
  width: auto;
  height: auto;
  background: none;
  color: var(--c);
  font-weight: 700;
}

body[data-sensor-view="upper"] .lg-lower,
body[data-sensor-view="lower"] .lg-upper { display: none; }
.lg-compare { display: none; }
body[data-compare-view="on"] .lg-compare { display: inline-flex; }

svg { display: block; }

.tooltip {
  position: fixed;
  background: var(--tooltip-bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 0.76rem;
  line-height: 1.7;
  pointer-events: none;
  z-index: 100;
  display: none;
  min-width: 210px;
  max-width: calc(100vw - 16px);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(8px);
}

.tooltip strong {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-strong);
  display: block;
  margin-bottom: 4px;
}

.tt-row { display: flex; justify-content: space-between; gap: 16px; }
.tt-row > span:last-child { font-family: var(--font-mono); font-size: 0.72rem; font-weight: 500; }
.tt-key { color: var(--muted); }

.crosshair {
  position: absolute;
  top: 0; bottom: 0;
  width: 1px;
  background: var(--crosshair);
  pointer-events: none;
  display: none;
}

/* Per-chart stats row */
.chart-stats {
  display: flex;
  border-top: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg3) 45%, var(--card));
  flex-wrap: wrap;
}

.chart-stats .stat {
  padding: 8px 16px;
  border-right: 1px solid var(--border);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.stat-label {
  font-size: 0.7rem;
  color: var(--muted);
  font-weight: 500;
}
.stat-val {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  font-weight: 500;
}

/* ── Compare summary ────────────────────────────────────────────────── */

.compare-summary {
  margin: 0 32px 16px;
  padding: 14px 18px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.compare-summary-header {
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 12px;
}
.compare-summary-header strong { color: var(--text-strong); font-weight: 600; }
.compare-summary-header .cmp-dashed {
  display: inline-block; width: 22px; height: 0; vertical-align: middle;
  border-top: 2px dashed var(--text); margin: 0 6px; opacity: 0.9;
}
.compare-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 10px 22px;
}
.cmp-metric {
  border-left: 3px solid var(--border);
  padding: 2px 0 2px 10px;
}
.cmp-metric-name {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--muted);
  margin-bottom: 2px;
}
.cmp-metric-vals {
  font-size: 0.84rem;
  font-family: var(--font-mono);
  color: var(--text);
}
.cmp-metric-vals .cmp-v-compare { color: var(--muted); }
.cmp-metric-vals .cmp-sep { color: var(--muted); margin: 0 5px; font-family: var(--font-sans); }
.cmp-metric-delta {
  font-size: 0.74rem;
  margin-top: 2px;
  font-family: var(--font-mono);
}
.cmp-delta-good { color: var(--good); }
.cmp-delta-bad { color: var(--bad); }
.cmp-delta-neutral { color: var(--muted); }

/* ── Coverage modal ─────────────────────────────────────────────────── */

.modal.wide {
  max-width: 1200px;
  width: 95vw;
}
#coverage-body { overflow-x: auto; }
.coverage-stats {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 20px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
}
.coverage-stats th, .coverage-stats td {
  padding: 8px 10px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.coverage-stats th {
  font-family: var(--font-sans);
  color: var(--muted);
  font-weight: 600;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.coverage-stats td { color: var(--text); }
.coverage-stats tbody tr:hover td { background: var(--bg3); }
.coverage-stats .sensor-name { display: flex; align-items: center; gap: 8px; font-family: var(--font-sans); }
.coverage-stats .sensor-dot { width: 9px; height: 9px; border-radius: 3px; flex-shrink: 0; }
.coverage-stats .cov-pct { font-weight: 600; }
.coverage-stats .cov-good { color: var(--good); }
.coverage-stats .cov-partial { color: var(--warn); }
.coverage-stats .cov-poor { color: var(--bad); }

.coverage-heatmap { margin-top: 8px; }
.coverage-heatmap-row-label,
.coverage-heatmap-month {
  fill: var(--muted);
  font-size: 10px;
  font-family: var(--font-sans);
}
.coverage-legend {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
  font-size: 0.74rem;
  color: var(--muted);
}
.coverage-legend-scale {
  display: flex;
  border-radius: 3px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.coverage-legend-scale > div {
  width: 24px;
  height: 10px;
}

/* ── Loading ────────────────────────────────────────────────────────── */

.loading-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 300;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  transition: opacity 0.4s;
}
.loading-overlay.fade-out { opacity: 0; pointer-events: none; }

.loading-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loading-text {
  font-size: 0.85rem;
  color: var(--muted);
}

/* ── Modals ─────────────────────────────────────────────────────────── */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.modal-overlay.open { display: flex; }

.modal {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  max-width: 640px;
  width: 100%;
  max-height: 88vh;
  overflow-y: auto;
  padding: 26px 30px;
}

.modal h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-strong);
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}

.modal h3 {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 20px;
  margin-bottom: 8px;
}

.modal p {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--text-2);
  margin-bottom: 10px;
}

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

.modal .operator {
  font-size: 0.88rem;
  color: var(--text-2);
  line-height: 1.7;
}

.modal .lang-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 22px 0;
}

.modal-close {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--muted);
  width: 32px;
  height: 32px;
  border-radius: 8px;
  font-size: 1.2rem;
  cursor: pointer;
  float: right;
  margin: 0 0 8px 8px;
  line-height: 1;
}
.modal-close:hover { color: var(--text-strong); }

/* ── Responsive ─────────────────────────────────────────────────────── */

/* Wind roses move below the time-series charts, side by side. */
@media (max-width: 1100px) {
  .dashboard { flex-direction: column; }
  .windrose-column { width: 100%; flex-direction: row; flex-wrap: wrap; }
  .windrose-column > .chart-wrap { flex: 1 1 320px; min-width: 0; }
}

@media (max-width: 640px) {
  body { font-size: 14px; }
  .site-header { padding: 16px 12px 12px; }
  h1 { font-size: 1.2rem; }
  .brand { flex: 1 1 0; }
  .status-pill { order: 3; flex: 1 1 100%; font-size: 0.72rem; }
  .windrose-wrap { min-height: 400px; }
  .controls { margin: 0 12px 12px; padding: 12px; gap: 12px 14px; }
  .btn { padding: 6px 10px; }
  .compare-summary { margin: 0 12px 12px; padding: 12px; }
  .dashboard { padding: 0 12px 24px; gap: 12px; }
  .dashboard-right, .windrose-column { gap: 12px; }
  .chart-label { left: 12px; right: 12px; }
  .chart-legend { gap: 2px 8px; }
  .lg { font-size: 0.68rem; }
  .chart-stats .stat { padding: 7px 12px; }
  .modal { padding: 20px 18px; }
}

/* ── Wind source notes ─────────────────────────────────────────────── */
.wind-source-note {
  font-size: 0.72rem;
  color: var(--muted);
  line-height: 1.4;
}
.windrose-wrap > .wind-source-note {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 8px;
  text-align: center;
}
.windrose-msg {
  position: absolute;
  top: 50%;
  left: 24px;
  right: 24px;
  transform: translateY(-50%);
  text-align: center;
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--text);
  padding: 10px 14px;
  background: color-mix(in srgb, var(--warn) 10%, var(--card));
  border: 1px solid color-mix(in srgb, var(--warn) 45%, var(--border));
  border-radius: 8px;
}
.link-btn {
  font: inherit;
  color: var(--accent);
  background: none;
  border: 0;
  padding: 0;
  text-decoration: underline;
  cursor: pointer;
}