:root {
  color-scheme: light;
  --bg: #fdf8f3; --card: #ffffff; --text: #1c1917; --muted: #78716c; --line: #f0e4d7;
  --accent: #f97316; --accent-strong: #ea580c; --accent-soft: #fff1e6;
  --ok: #16a34a; --warn: #d97706; --bad: #dc2626; --info: #c2410c;
  --chart-grid: #f3e8dc; --chart-line: #f97316; --chart-fill: rgba(249, 115, 22, .12);
  --radius: 16px; --shadow: 0 1px 2px rgba(124, 45, 18, .05), 0 6px 18px rgba(124, 45, 18, .06);
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); }
body { font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; padding-bottom: env(safe-area-inset-bottom); }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.err { color: var(--bad); }
h1 { font-size: 22px; margin: 0 0 6px; }
h2 { font-size: 17px; margin: 0 0 10px; }
h3 { font-size: 15px; margin: 18px 0 6px; }
code { background: var(--accent-soft); padding: 1px 5px; border-radius: 5px; font-size: 13px; }

.top { position: sticky; top: 0; z-index: 10; display: flex; justify-content: space-between; align-items: center;
  padding: calc(10px + env(safe-area-inset-top)) 16px 10px; background: var(--card); border-bottom: 3px solid var(--accent); }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; min-width: 0; }
.brand span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.top-right { display: flex; gap: 6px; align-items: center; flex-shrink: 0; }
.pill { font-size: 12px; font-weight: 600; padding: 4px 10px; border-radius: 999px; background: var(--line); white-space: nowrap; }
.pill.on { background: rgba(22, 163, 74, .15); color: var(--ok); }
.pill.off { background: rgba(220, 38, 38, .12); color: var(--bad); }
.pill.wait { background: rgba(217, 119, 6, .15); color: var(--warn); }

.view { max-width: 980px; margin: 0 auto; padding: 16px; }
.card { background: var(--card); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); border: 1px solid var(--line); margin-bottom: 14px; }
.connect { max-width: 520px; margin: 24px auto; }
.help ol { padding-left: 20px; margin: 6px 0; }

.tabs { display: flex; gap: 4px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 4px; margin-bottom: 14px; overflow-x: auto; }
.tabs button { flex: 1; border: 0; background: none; color: var(--muted); font: inherit; font-weight: 600; padding: 9px 10px; border-radius: 9px; cursor: pointer; white-space: nowrap; }
.tabs button.active { background: var(--accent); color: #fff; box-shadow: 0 2px 8px rgba(249, 115, 22, .35); }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; border: 1px solid var(--line); background: var(--card); color: var(--text);
  font: inherit; font-weight: 600; padding: 10px 16px; border-radius: 10px; cursor: pointer; text-decoration: none; }
.btn:hover { border-color: var(--muted); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-strong); border-color: var(--accent-strong); }
.btn.danger { color: var(--bad); }
.btn.big { width: 100%; padding: 14px; font-size: 16px; margin: 8px 0; }
.btn:disabled { opacity: .5; cursor: default; }
.row { display: flex; gap: 8px; align-items: center; }
.wrap { flex-wrap: wrap; }

label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; font-weight: 600; color: var(--muted); }
label.check { flex-direction: row; align-items: center; gap: 8px; color: var(--text); font-size: 14px; }
input, select { font: inherit; color: var(--text); background: #fff; border: 1px solid var(--line); border-radius: 9px; padding: 9px 10px; width: 100%; }
input[type=checkbox] { width: 18px; height: 18px; accent-color: var(--accent); }
input[type=file] { padding: 6px; flex: 1; min-width: 0; }

.grid { display: grid; gap: 12px; }
.grid.two { grid-template-columns: 1fr 1fr; }
.stats { grid-template-columns: repeat(4, 1fr); gap: 14px; }
.stats .card { margin: 0; }
@media (max-width: 720px) { .stats { grid-template-columns: 1fr 1fr; gap: 10px; } }
@media (max-width: 560px) { .grid.two { grid-template-columns: 1fr; } }

.hero { text-align: center; padding: 22px 16px; background: linear-gradient(180deg, var(--accent-soft), #fff 70%); border-color: #fcd9bd; }
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: var(--accent); }
.hero-temp { font-size: clamp(56px, 16vw, 96px); font-weight: 800; letter-spacing: -2px; line-height: 1; font-variant-numeric: tabular-nums; }
.hero-temp .unit { font-size: .35em; font-weight: 600; color: var(--muted); margin-left: 4px; vertical-align: top; letter-spacing: 0; }
.hero-sub { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; margin-top: 10px; }
.fault { color: var(--bad); font-weight: 700; margin-top: 8px; }
.hero.alarm .hero-temp { color: var(--bad); }

.stat .k { font-size: 12px; color: var(--muted); font-weight: 600; }
.stat { border-top: 3px solid var(--accent); }
.stat .v { font-size: 22px; font-weight: 700; margin-top: 2px; font-variant-numeric: tabular-nums; }
.stat .s { font-size: 12px; color: var(--muted); }

.banner { border-radius: 12px; padding: 10px 14px; margin-bottom: 14px; font-weight: 600; background: rgba(220, 38, 38, .12); color: var(--bad); }
.banner.info { background: var(--accent-soft); color: var(--info); }

.chart-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 8px; }
.seg { display: flex; background: var(--bg); border-radius: 9px; padding: 3px; overflow-x: auto; max-width: 100%; }
.seg button { border: 0; background: none; color: var(--muted); font: inherit; font-size: 13px; font-weight: 600; padding: 6px 10px; border-radius: 7px; cursor: pointer; white-space: nowrap; }
.seg button.active { background: var(--card); color: var(--text); box-shadow: var(--shadow); }
#chart { width: 100%; height: 280px; display: block; touch-action: pan-y; }

.presets { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 10px; margin-bottom: 14px; }
.preset { border: 2px solid var(--line); border-radius: 12px; padding: 12px; cursor: pointer; background: var(--bg); text-align: left; font: inherit; color: var(--text); }
.preset.active { border-color: var(--accent); background: var(--accent-soft); }
.preset b { display: block; }
.preset .life { font-size: 18px; font-weight: 800; color: var(--accent); margin-top: 4px; }
.preset .d { font-size: 12px; color: var(--muted); }
.sticky-save { position: sticky; bottom: 0; display: flex; justify-content: flex-end; align-items: center; gap: 12px; padding: 12px 0; background: linear-gradient(transparent, var(--bg) 30%); }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; font-variant-numeric: tabular-nums; }
th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { color: var(--muted); font-weight: 600; }
.kv { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; margin: 0; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; font-weight: 600; word-break: break-all; }
progress { width: 100%; margin-top: 10px; accent-color: var(--accent); }

.toast { position: fixed; left: 50%; bottom: calc(20px + env(safe-area-inset-bottom)); transform: translateX(-50%); background: var(--accent-strong); color: #fff; box-shadow: var(--shadow);
  padding: 10px 18px; border-radius: 10px; font-weight: 600; z-index: 50; max-width: calc(100% - 32px); }

/* ---- úvod, přihlášení, cloud ---- */
.welcome { text-align: center; margin: 24px auto 18px; max-width: 560px; }
.welcome img { border-radius: 16px; box-shadow: 0 8px 24px rgba(249, 115, 22, .3); }
.welcome h1 { font-size: 26px; margin-top: 14px; }
.choice-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; max-width: 760px; margin: 0 auto; }
@media (max-width: 640px) { .choice-grid { grid-template-columns: 1fr; } }
.choice { display: flex; flex-direction: column; gap: 8px; text-align: left; font: inherit; color: var(--text); cursor: pointer;
  background: var(--card); border: 2px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); transition: border-color .15s, transform .15s; }
.choice:hover { border-color: var(--accent); transform: translateY(-2px); }
.choice b { font-size: 18px; }
.choice-ico { width: 44px; height: 44px; border-radius: 12px; background: var(--accent-soft); color: var(--accent-strong); display: grid; place-items: center; font-size: 24px; }
.choice .note { font-size: 13px; color: var(--info); background: var(--accent-soft); border-radius: 10px; padding: 8px 10px; }
.steps { padding-left: 20px; }
.steps li { margin-bottom: 12px; }
.steps .btn.big { margin-top: 8px; }
.between { justify-content: space-between; }
.link { background: none; border: 0; color: var(--accent-strong); font: inherit; font-weight: 600; cursor: pointer; padding: 6px 0; }
.icon-btn { border: 1px solid var(--line); background: var(--card); color: var(--text); border-radius: 10px; width: 34px; height: 30px; font-size: 18px; cursor: pointer; }
.menu { position: absolute; right: 16px; top: 100%; margin-top: 6px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); padding: 6px; display: flex; flex-direction: column; min-width: 220px; z-index: 20; }
.menu button { background: none; border: 0; text-align: left; font: inherit; padding: 10px 12px; border-radius: 8px; cursor: pointer; color: var(--text); }
.menu button:hover { background: var(--accent-soft); }
.dev-select { width: auto; max-width: 160px; padding: 5px 8px; font-size: 13px; }
.dev-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; margin-top: 14px; }
.dev-card { text-align: left; font: inherit; color: var(--text); cursor: pointer; background: var(--card); border: 1px solid var(--line); border-top: 3px solid var(--accent); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); }
.dev-card .t { font-size: 34px; font-weight: 800; margin: 6px 0; }
.dev-card .t small { font-size: 16px; color: var(--muted); }
.claim { margin-top: 14px; background: var(--accent-soft); border: 1px dashed var(--accent); border-radius: 12px; padding: 14px; text-align: center; }
.claim-code { font-size: 34px; font-weight: 800; letter-spacing: 6px; color: var(--accent-strong); font-family: ui-monospace, monospace; }
#pairForm input { text-transform: uppercase; letter-spacing: 3px; font-weight: 700; }
.ok-msg { color: var(--ok); }
.demo-row { text-align: center; max-width: 760px; margin: 18px auto 0; }
.demo-btn { border-style: dashed; border-color: var(--accent); color: var(--accent-strong); background: var(--accent-soft); }
.test-dev { margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line); }
.test-dev h3 { margin-top: 0; }
body.cloud .local-only, body:not(.cloud) .cloud-only { display: none !important; }
.top { position: sticky; }