:root {
  --bg: #12151a;
  --surface: #1c2027;
  --surface-hi: #262b34;
  --text: #f2f4f7;
  --muted: #9aa3b0;
  --accent: #f36f21;
  --accent-hi: #ff8438;
  --danger: #e2574c;
  --radius: 16px;
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f2f4f7;
    --surface: #fff;
    --surface-hi: #e3e7ee;
    --text: #12151a;
    --muted: #626b7b;
    color-scheme: light;
  }
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-text-size-adjust: 100%;
}

#app {
  max-width: 480px;
  margin: 0 auto;
  padding: max(16px, env(safe-area-inset-top)) 16px calc(16px + env(safe-area-inset-bottom));
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.topbar h1 {
  font-size: 20px;
  font-weight: 600;
  margin: 0;
  letter-spacing: 0.01em;
}

.icon-btn {
  background: none;
  border: 0;
  color: var(--muted);
  font-size: 24px;
  line-height: 1;
  padding: 6px;
  cursor: pointer;
}

.icon-btn:hover { color: var(--text); }

.lead { color: var(--muted); line-height: 1.5; margin-top: 0; }
.note { color: var(--muted); font-size: 13px; line-height: 1.5; }
.note.error { color: var(--danger); }
.muted { color: var(--muted); }

a { color: var(--accent); }

.redirect-uri code {
  display: block;
  background: var(--surface);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 13px;
  word-break: break-all;
  user-select: all;
}

label {
  display: block;
  margin-bottom: 16px;
  font-size: 14px;
  color: var(--muted);
}

input[type="text"], input[type="password"], input[type="number"] {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 12px;
  font-size: 16px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--surface-hi);
  border-radius: 10px;
}

input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

button { font-family: inherit; }

.primary, .secondary, .danger {
  display: block;
  width: 100%;
  padding: 14px;
  font-size: 16px;
  font-weight: 600;
  border: 0;
  border-radius: 12px;
  cursor: pointer;
}

.primary { background: var(--accent); color: #fff; }
.primary:hover { background: var(--accent-hi); }
.secondary { background: var(--surface-hi); color: var(--text); margin-top: 12px; }
.danger { background: none; color: var(--danger); box-shadow: inset 0 0 0 1px var(--danger); }

button:disabled { opacity: 0.5; cursor: default; }

.status {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  margin-bottom: 20px;
}

.status-room { color: var(--muted); font-size: 14px; }

.status-temp {
  font-size: 56px;
  font-weight: 300;
  line-height: 1.1;
  margin: 4px 0;
  font-variant-numeric: tabular-nums;
}

.status-temp .deg { font-size: 24px; color: var(--muted); margin-left: 2px; }

.status-sub { color: var(--muted); font-size: 14px; min-height: 20px; }
.status-sub.active { color: var(--accent); font-weight: 600; }

.boosts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.boost {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  aspect-ratio: 1;
  background: var(--surface);
  color: var(--text);
  border: 0;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.12s, transform 0.12s;
}

.boost:hover { background: var(--surface-hi); }
.boost:active { transform: scale(0.96); }
.boost .num { font-size: 34px; font-weight: 600; }
.boost .unit { font-size: 13px; color: var(--muted); }

.message { min-height: 20px; text-align: center; font-size: 14px; color: var(--muted); }
.message.error { color: var(--danger); }
.message.ok { color: var(--accent); }

fieldset {
  border: 1px solid var(--surface-hi);
  border-radius: 12px;
  padding: 12px 16px;
  margin: 0 0 16px;
}

legend { color: var(--muted); font-size: 14px; padding: 0 6px; }

.room-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  font-size: 16px;
}

.room-row input { width: 20px; height: 20px; accent-color: var(--accent); }

.settings-actions { display: grid; gap: 12px; }

.spinner {
  width: 32px;
  height: 32px;
  margin: 40px auto 16px;
  border: 3px solid var(--surface-hi);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

@media (prefers-reduced-motion: reduce) {
  .spinner { animation-duration: 2s; }
  .boost { transition: none; }
}

details {
  margin-top: 24px;
  border-top: 1px solid var(--surface-hi);
  padding-top: 12px;
}

summary {
  color: var(--muted);
  font-size: 14px;
  cursor: pointer;
  padding: 4px 0;
}

textarea {
  display: block;
  width: 100%;
  margin: 10px 0;
  padding: 12px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--surface-hi);
  border-radius: 10px;
  resize: vertical;
}

textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

#import-note.ok { color: var(--accent); }

.chart-wrap {
  margin-top: 20px;
  background: var(--surface);
  border-radius: var(--radius);
  padding: 16px 12px 8px;
}

.chart-legend {
  color: var(--muted);
  font-size: 12px;
  text-align: center;
  margin: 6px 0 4px;
}

.legend-band { color: var(--accent); }

.chart-range {
  display: flex;
  justify-content: center;
  gap: 4px;
  margin: 4px 0 6px;
}

.chart-range button {
  background: none;
  border: 0;
  padding: 4px 12px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
  cursor: pointer;
}

.chart-range button.active {
  background: var(--surface-hi);
  color: var(--text);
}

.chart {
  display: block;
  width: 100%;
  margin-top: 14px;
}

.chart .chart-line {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.chart .chart-setpoint {
  fill: none;
  stroke: var(--muted);
  stroke-width: 1.5;
}

.chart .chart-band { fill: var(--accent); opacity: 0.75; }
.chart .chart-dot { fill: var(--text); }

.chart .chart-label {
  fill: var(--muted);
  font-size: 9px;
  font-family: inherit;
}

.chart .chart-empty { fill: var(--muted); font-size: 12px; }