:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --ink-1: #0b0b0b;
  --ink-2: #52514e;
  --ink-muted: #898781;
  --grid: #e1e0d9;
  --baseline: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --accent: #2a78d6;
  --accent-ink: #ffffff;

  /* серии — фиксированный порядок: почва, температура, воздух */
  --series-soil: #2a78d6;
  --series-temp: #eb6834;
  --series-air: #1baf7a;

  --good: #0ca30c;
  --good-ink: #006300;
  --critical: #d03b3b;
  --warning: #fab219;

  --radius: 12px;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --ink-1: #ffffff;
    --ink-2: #c3c2b7;
    --ink-muted: #898781;
    --grid: #2c2c2a;
    --baseline: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --accent: #3987e5;
    --accent-ink: #ffffff;

    --series-soil: #3987e5;
    --series-temp: #d95926;
    --series-air: #199e70;

    --good-ink: #0ca30c;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--page);
  color: var(--ink-1);
  line-height: 1.4;
}

button {
  font: inherit;
  cursor: pointer;
}

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

button.primary {
  background: var(--accent);
  color: var(--accent-ink);
  border: 0;
  border-radius: 10px;
  padding: 12px 22px;
  font-weight: 600;
}
button.primary:disabled { opacity: 0.6; cursor: default; }

button.ghost {
  background: none;
  border: 1px solid var(--border);
  color: var(--ink-2);
  border-radius: 8px;
  padding: 6px 12px;
}

/* --- вход --- */

body.login {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 16px;
}
.login-card {
  width: min(360px, 100%);
  padding: 24px;
  display: grid;
  gap: 12px;
}
.login-card h1 { margin: 0 0 8px; font-size: 22px; }
.login-card label { color: var(--ink-2); font-size: 14px; }
.login-card input {
  font: inherit;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--baseline);
  background: var(--page);
  color: var(--ink-1);
}
.error { color: var(--critical); margin: 0; font-size: 14px; }

/* --- дашборд --- */

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 16px;
  display: grid;
  gap: 16px;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
header h1 { margin: 0; font-size: 22px; }
.link-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--ink-2);
}
.link-status .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ink-muted);
}
.link-status.online .dot { background: var(--good); }
.link-status.offline .dot { background: var(--critical); }
.header-right { display: flex; align-items: center; gap: 12px; }

.tiles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.tile { padding: 14px 16px; }
.tile .label {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink-2);
  font-size: 14px;
}
.tile .key {
  width: 16px;
  height: 0;
  border-top: 2px solid var(--key);
  border-radius: 2px;
  flex: none;
}
.tile .value {
  font-size: 30px;
  font-weight: 600;
  margin-top: 4px;
}
.tile .value .unit { font-size: 16px; font-weight: 400; color: var(--ink-2); margin-left: 2px; }
.tile .sub { font-size: 13px; color: var(--ink-muted); margin-top: 2px; min-height: 1.4em; }

.water {
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.water-state { color: var(--ink-2); font-size: 14px; }
.water-state.pending { color: var(--ink-1); }
.water-duration {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--ink-2);
  font-size: 14px;
}
input[data-setting] {
  width: 72px;
  font: inherit;
  padding: 6px 8px;
  border-radius: 8px;
  border: 1px solid var(--baseline);
  background: var(--page);
  color: var(--ink-1);
}
.setting-state { min-width: 5.5em; color: var(--ink-muted); font-size: 13px; }
.setting-state.error { color: var(--critical); }

.calibration { padding: 0 16px; }
.calibration summary { padding: 14px 0; font-weight: 600; cursor: pointer; }
.calibration[open] { padding-bottom: 16px; }
.calibration-note { color: var(--ink-2); font-size: 13px; margin: 0 0 12px; }
.cal-grid {
  display: grid;
  grid-template-columns: max-content max-content 1fr;
  gap: 10px 16px;
  align-items: center;
  font-size: 14px;
  margin-bottom: 12px;
}
.cal-input { display: inline-flex; align-items: center; gap: 6px; color: var(--ink-2); }
.cal-now { color: var(--ink-muted); font-size: 13px; }

.ranges {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}
.ranges button {
  background: none;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 6px 12px;
  color: var(--ink-2);
}
.ranges button:hover { background: var(--border); }
.ranges button[aria-pressed="true"] {
  border-color: var(--baseline);
  background: var(--surface);
  color: var(--ink-1);
  font-weight: 600;
}

.chart-card { padding: 14px 8px 8px 12px; position: relative; }
.chart-title { display: flex; align-items: center; gap: 6px; margin: 0 0 6px 4px; }
.chart-title h2 { margin: 0; font-size: 15px; font-weight: 600; }

/* значок (?) и всплывающая подсказка */
.hint {
  width: 20px;
  height: 20px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--baseline);
  background: none;
  color: var(--ink-2);
  font-size: 12px;
  font-weight: 600;
  line-height: 18px;
  flex: none;
}
.hint:hover { background: var(--border); }
.hint-popover {
  max-width: min(360px, calc(100vw - 32px));
  padding: 4px 16px;
  color: var(--ink-1);
  font-size: 14px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
}
.hint-popover::backdrop { background: rgba(0, 0, 0, 0.2); }
.chart { transition: opacity 0.15s; }
.chart.loading { opacity: 0.5; }
.chart-empty {
  position: absolute;
  inset: 40px 0 40px 0;
  display: grid;
  place-items: center;
  color: var(--ink-muted);
  font-size: 14px;
  pointer-events: none;
}
.chart-empty[hidden] { display: none; }

/* легенда uPlot: ключ-линия вместо квадрата, значения — основным цветом текста */
.u-legend { font-size: 13px; color: var(--ink-2); text-align: left; margin-left: 4px; }
.u-legend th { font-weight: 400; }
.u-legend td { color: var(--ink-1); font-variant-numeric: tabular-nums; }
.u-legend .u-marker {
  width: 16px !important;
  height: 0 !important;
  border-width: 2px 0 0 0 !important;
  border-style: solid !important;
  background: none !important;
  vertical-align: middle;
  border-radius: 2px;
}
.u-legend .u-series:first-child .u-marker { display: none; }

@media (max-width: 560px) {
  .tiles { grid-template-columns: 1fr 1fr; }
  .tiles .tile:first-child { grid-column: span 2; }
  .tile .value { font-size: 26px; }
  .water button.primary { flex: 1; }
  .water-duration { margin-left: 0; }
  .cal-grid { grid-template-columns: 1fr max-content; }
  .cal-now { grid-column: 1 / -1; margin-top: -6px; }
  .cal-now:empty { display: none; }
}