:root {
  color-scheme: light;
  --surface-1:      #fcfcfb;
  --page-plane:      #f9f9f7;
  --text-primary:   #0b0b0b;
  --text-secondary: #52514e;
  --text-muted:     #898781;
  --gridline:       #e1e0d9;
  --baseline:       #c3c2b7;
  --border:         rgba(11,11,11,0.10);
  --accent:         #2a78d6;
  --accent-dark:    #184f95;
  --status-good:     #0ca30c;
  --status-warning:  #fab219;
  --status-serious:  #ec835a;
  --status-critical: #d03b3b;
}

@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --surface-1:      #1a1a19;
    --page-plane:      #0d0d0d;
    --text-primary:   #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted:     #898781;
    --gridline:       #2c2c2a;
    --baseline:       #383835;
    --border:         rgba(255,255,255,0.10);
    --accent:         #3987e5;
    --accent-dark:    #0d366b;
    --status-good:     #0ca30c;
    --status-warning:  #fab219;
    --status-serious:  #ec835a;
    --status-critical: #d03b3b;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --surface-1:      #1a1a19;
  --page-plane:      #0d0d0d;
  --text-primary:   #ffffff;
  --text-secondary: #c3c2b7;
  --text-muted:     #898781;
  --gridline:       #2c2c2a;
  --baseline:       #383835;
  --border:         rgba(255,255,255,0.10);
  --accent:         #3987e5;
  --accent-dark:    #0d366b;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  background: var(--page-plane);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-tap-highlight-color: transparent;
  overflow-x: hidden;
}

.app {
  max-width: 480px;
  margin: 0 auto;
  padding: 16px 16px calc(32px + env(safe-area-inset-bottom));
  min-height: 100dvh;
}

section { overflow: hidden; }

@media (max-width: 380px) {
  .app { padding: 12px 10px calc(24px + env(safe-area-inset-bottom)); }
  section { padding: 12px; border-radius: 14px; }
  .app-header h1 { font-size: 19px; }
  .app-header__logo { width: 32px; height: 32px; }
  .setting-row { font-size: 13px; }
  .setting-row input[type="range"] { width: 100px; }
  .btn { padding: 12px 10px; font-size: 14px; }
}

@media (max-height: 700px) {
  .radar { width: min(190px, 50vw, 42vh); }
  .app-header { padding: 6px 0 12px; }
  section { padding: 12px; margin-bottom: 8px; }
}

.app-header {
  padding: 12px 0 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.app-header__logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  flex-shrink: 0;
}

.app-header h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  display: flex;
  flex-direction: column;
  gap: 2px;
  text-align: left;
}

.app-header__en {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

section {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 12px;
}

section h2 {
  margin: 0 0 12px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-secondary);
}

/* Radar */
.radar-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 20px 16px;
}

.radar {
  position: relative;
  width: min(240px, 62vw, 62vh);
  aspect-ratio: 1 / 1;
}

.radar__canvas {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: 50%;
  background: var(--page-plane);
}

.radar__center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.radar__value {
  font-size: clamp(32px, 9vw, 48px);
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: proportional-nums;
}

.radar__unit {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  margin-top: 4px;
}

.radar__disclaimer {
  margin: 0;
  font-size: 11px;
  color: var(--text-muted);
  text-align: center;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--page-plane);
  font-weight: 700;
  font-size: 15px;
}

.status-badge__icon { font-size: 18px; }

.status-badge[data-status="idle"] { color: var(--text-muted); }
.status-badge[data-status="low"] { color: var(--status-good); }
.status-badge[data-status="medium"] { color: var(--status-warning); }
.status-badge[data-status="high"] { color: var(--status-serious); }
.status-badge[data-status="critical"] { color: var(--status-critical); }

/* Mode info */
.mode-info {
  text-align: center;
  color: var(--text-secondary);
  font-size: 13px;
}
.mode-info p { margin: 0; }

.mode-info--error {
  color: var(--status-critical);
  font-weight: 700;
}

/* Trend chart */
.chart-section__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.chart-section__header h2 { margin: 0; }

.trend-indicator {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
}

.trend-indicator[data-trend="rising"] { color: var(--status-serious); }
.trend-indicator[data-trend="falling"] { color: var(--accent); }

.chart-section__readout {
  display: flex;
  gap: 16px;
  margin-bottom: 8px;
  font-size: 12px;
  color: var(--text-secondary);
}

.chart-section__readout strong {
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}

.trend-canvas {
  width: 100%;
  height: 120px;
  display: block;
}

.chart-section__note {
  margin: 10px 0 0;
  font-size: 12px;
  color: var(--text-muted);
}

/* Scan guide */
.scan-guide__hint {
  margin: 0 0 10px;
  font-size: 13px;
  color: var(--text-secondary);
  text-align: center;
}
.scan-guide__checks {
  display: flex;
  gap: 8px;
  justify-content: center;
}
.scan-chip {
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--page-plane);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
}
.scan-chip[data-ok="true"] {
  color: var(--status-good);
  border-color: var(--status-good);
}

/* Controls */
.controls {
  display: flex;
  gap: 10px;
  background: none;
  border: none;
  padding: 0;
  margin-bottom: 12px;
}

.btn {
  flex: 1;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface-1);
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}

.btn:disabled {
  color: var(--text-muted);
  cursor: not-allowed;
}

.btn--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

.btn--primary[data-active="true"] {
  background: var(--status-critical);
  border-color: var(--status-critical);
}

/* Sensor panel */
.sensor-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sensor-list__item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}

.sensor-list__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--text-muted);
  flex-shrink: 0;
}

.sensor-list__item[data-state="active"] .sensor-list__dot { background: var(--status-good); }
.sensor-list__item[data-state="unavailable"] .sensor-list__dot { background: var(--status-critical); }

.sensor-list__detail {
  margin-left: auto;
  color: var(--text-muted);
  font-size: 12px;
  text-align: right;
}

/* Settings */
.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
  font-size: 14px;
}

.setting-row input[type="range"] {
  width: 120px;
  accent-color: var(--accent);
}

.setting-row--toggle span {
  flex: 1;
  color: var(--text-secondary);
  font-size: 13px;
}

.setting-row input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--accent);
  flex-shrink: 0;
}

/* BLE panel */
.ble-panel__note {
  margin: 0 0 10px;
  font-size: 12px;
  color: var(--text-muted);
}

.ble-panel__status {
  font-size: 13px;
  color: var(--text-secondary);
}

/* Disclaimer */
.disclaimer {
  font-size: 13px;
  color: var(--text-secondary);
}

.disclaimer summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--text-primary);
}

.disclaimer ul {
  margin: 10px 0 0;
  padding-left: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}