:root {
    --bg: #f4f6f5;
    --surface: #ffffff;
    --text: #17201d;
    --muted: #5d6b66;
    --border: #dfe5e2;
    --accent: #0f766e;
    --accent-ink: #ffffff;
    --accent-soft: #ccfbf1;
    --water: #0284c7;
    --danger: #b91c1c;
    --warn: #b45309;
    --ok: #15803d;
    --track: #e6ecea;
    --radius: 14px;
    --shadow: 0 1px 2px rgb(0 0 0 / .05), 0 4px 16px rgb(0 0 0 / .04);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0e1412;
        --surface: #161e1b;
        --text: #e5ece9;
        --muted: #93a39d;
        --border: #26312d;
        --accent: #2dd4bf;
        --accent-ink: #062b27;
        --accent-soft: #123b36;
        --water: #38bdf8;
        --danger: #f87171;
        --warn: #fbbf24;
        --ok: #4ade80;
        --track: #24302c;
        --shadow: none;
    }
}

* { box-sizing: border-box; }

html, body { margin: 0; }

body {
    background: var(--bg);
    color: var(--text);
    font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    -webkit-font-smoothing: antialiased;
}

[hidden] { display: none !important; }

.topbar {
    display: flex; align-items: center; justify-content: space-between;
    padding: 12px 16px; max-width: 920px; margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 650; font-size: 18px; }
.topbar-right { display: flex; align-items: center; gap: 8px; }

main { max-width: 920px; margin: 0 auto; padding: 0 16px 48px; }

h1 { font-size: 24px; margin: 0 0 8px; }
h2 { font-size: 19px; margin: 0; }

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 16px;
}
.card.narrow { max-width: 420px; margin: 8vh auto 0; text-align: center; }

.muted { color: var(--muted); }
.small { font-size: 14px; }
code { font-size: 14px; background: var(--track); padding: 1px 6px; border-radius: 6px; }

button {
    font: inherit; font-weight: 550;
    border: 1px solid var(--border); background: var(--surface); color: var(--text);
    padding: 10px 16px; border-radius: 10px; cursor: pointer;
    min-height: 44px;
}
button:hover:not(:disabled) { border-color: var(--muted); }
button:disabled { opacity: .55; cursor: default; }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
button.danger { background: var(--danger); border-color: var(--danger); color: #fff; }
button.ghost { background: transparent; border-color: transparent; color: var(--muted); }
button.big { width: 100%; padding: 14px; margin-top: 12px; }
button:focus-visible, input:focus-visible, summary:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--accent) 45%, transparent); outline-offset: 2px;
}

input {
    font: inherit; color: var(--text); background: var(--bg);
    border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; min-height: 44px;
    width: 100%;
}

.field { display: grid; gap: 6px; text-align: left; margin: 12px 0; }
.field span { font-size: 14px; color: var(--muted); }

.row { display: flex; gap: 8px; align-items: center; margin-top: 12px; }
.row.wrap { flex-wrap: wrap; }
.row input { flex: 1; }

.pill {
    font-size: 13px; font-weight: 600; padding: 4px 10px; border-radius: 999px;
    background: var(--track); color: var(--muted); white-space: nowrap;
}
.pill.ok { background: color-mix(in srgb, var(--ok) 16%, transparent); color: var(--ok); }
.pill.bad { background: color-mix(in srgb, var(--danger) 16%, transparent); color: var(--danger); }

/* ---------- zařízení ---------- */

.devices { display: grid; gap: 16px; }

.device-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }

.moisture { display: flex; gap: 24px; align-items: center; margin: 20px 0; flex-wrap: wrap; }

.gauge { position: relative; width: 150px; height: 150px; flex: none; }
.gauge svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.g-track, .g-value { fill: none; stroke-width: 12; }
.g-track { stroke: var(--track); }
.g-value { stroke: var(--water); stroke-linecap: round; transition: stroke-dasharray .6s ease; }
.g-threshold { stroke: var(--warn); stroke-width: 3; stroke-linecap: round; transform-origin: 60px 60px; }
.g-label { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; }
.g-pct { font-size: 34px; font-weight: 700; font-variant-numeric: tabular-nums; }
.g-caption { font-size: 13px; color: var(--muted); }

.stats { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 20px; margin: 0; flex: 1; min-width: 220px; }
.stats dt { font-size: 13px; color: var(--muted); }
.stats dd { margin: 2px 0 0; font-weight: 600; font-variant-numeric: tabular-nums; }

.pump {
    display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap;
    padding: 14px; border-radius: 12px; background: var(--bg); border: 1px solid var(--border);
}
.pump-state { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.dot { width: 12px; height: 12px; border-radius: 50%; background: var(--track); }
.pump.running .dot { background: var(--water); animation: pulse 1.2s infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 7px color-mix(in srgb, var(--water) 22%, transparent); } }
@media (prefers-reduced-motion: reduce) { .pump.running .dot { animation: none; } }

.pump-controls { display: flex; gap: 8px; align-items: center; }
.stepper { position: relative; width: 88px; }
.stepper input { padding-right: 26px; text-align: right; }
.stepper .unit { position: absolute; right: 10px; top: 50%; transform: translateY(-50%); color: var(--muted); }

.modes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin-top: 16px;
         border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.modes button { border: 0; border-radius: 0; background: var(--surface); color: var(--muted); }
.modes button + button { border-left: 1px solid var(--border); }
.modes button[aria-checked="true"] { background: var(--accent-soft); color: var(--text); }
.modes button[data-mode="stop"][aria-checked="true"] { background: color-mix(in srgb, var(--danger) 18%, transparent); }

details.settings { margin-top: 16px; }
summary { cursor: pointer; font-weight: 600; padding: 4px 0; }
.d-config { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 16px; }
.d-config .row, .d-config p { grid-column: 1 / -1; }

.list { list-style: none; padding: 0; margin: 12px 0 0; }
.list li { display: flex; justify-content: space-between; align-items: center; gap: 12px;
           padding: 10px 0; border-bottom: 1px solid var(--border); }
.list li:last-child { border-bottom: 0; }

.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

.toast {
    position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%);
    background: var(--text); color: var(--bg); padding: 12px 18px; border-radius: 10px;
    max-width: calc(100% - 32px); box-shadow: 0 6px 24px rgb(0 0 0 / .2); z-index: 10;
}
.toast.error { background: var(--danger); color: #fff; }

@media (max-width: 560px) {
    .card { padding: 16px; }
    .moisture { justify-content: center; }
    .pump-controls { width: 100%; }
    .pump-controls button { flex: 1; }
    .d-config { grid-template-columns: 1fr; }
}