/* ===== Vzhled: barvy a rozměry jako proměnné (osobní nastavení uživatele
   se promítá do atributů <html data-theme data-accent data-font data-density data-width>) ===== */
:root {
  color-scheme: light;
  --is-dark: 0;
  --bg: #f4f6f9;
  --surface: #ffffff;
  --text: #1d2733;
  --muted: #6b7785;
  --border: #dde3ea;
  --muted-bg: #eef1f4;
  --input-bg: #ffffff;
  --btn-bg: #ffffff;
  --hover-bg: #fafbfc;
  --ok: #1a7f37;
  --ok-bg: #dafbe1;
  --ok-border: #aceebb;
  --err: #cf222e;
  --err-bg: #ffebe9;
  --err-border: #ffcecb;
  --offline-bg: #fffafa;
  --topbar: #16202c;
  --radius: 8px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06);
  --shadow-hover: 0 4px 14px rgba(16, 24, 40, .1);

  --primary: #1f6feb;
  --primary-hover: #1959c2;
  --link: var(--primary);
  --focus: color-mix(in srgb, var(--primary) 35%, transparent);

  --font-size: 15px;
  --card-pad: 16px 18px;
  --gap: 16px;
  --cell-pad: .5rem .6rem;
  --content-max: 1400px;
}

/* tmavý motiv – zvolený, nebo „podle systému“ při tmavém systému */
html[data-theme="dark"] {
  color-scheme: dark;
  --is-dark: 1;
  --bg: #0f141a;
  --surface: #171d25;
  --text: #e2e8ef;
  --muted: #8d99a7;
  --border: #2b3441;
  --muted-bg: #222a35;
  --input-bg: #10161d;
  --btn-bg: #1d2530;
  --hover-bg: #1c232c;
  --ok: #3fb950;
  --ok-bg: rgba(46, 160, 67, .15);
  --ok-border: rgba(46, 160, 67, .4);
  --err: #f85149;
  --err-bg: rgba(248, 81, 73, .12);
  --err-border: rgba(248, 81, 73, .4);
  --offline-bg: rgba(248, 81, 73, .06);
  --topbar: #0b0f14;
  --shadow: none;
  --shadow-hover: 0 4px 14px rgba(0, 0, 0, .45);
  --link: color-mix(in srgb, var(--primary) 60%, #fff);
}
@media (prefers-color-scheme: dark) {
  html[data-theme="auto"] {
    color-scheme: dark;
    --is-dark: 1;
    --bg: #0f141a;
    --surface: #171d25;
    --text: #e2e8ef;
    --muted: #8d99a7;
    --border: #2b3441;
    --muted-bg: #222a35;
    --input-bg: #10161d;
    --btn-bg: #1d2530;
    --hover-bg: #1c232c;
    --ok: #3fb950;
    --ok-bg: rgba(46, 160, 67, .15);
    --ok-border: rgba(46, 160, 67, .4);
    --err: #f85149;
    --err-bg: rgba(248, 81, 73, .12);
    --err-border: rgba(248, 81, 73, .4);
    --offline-bg: rgba(248, 81, 73, .06);
    --topbar: #0b0f14;
    --shadow: none;
    --shadow-hover: 0 4px 14px rgba(0, 0, 0, .45);
    --link: color-mix(in srgb, var(--primary) 60%, #fff);
  }
}

/* barva zvýraznění */
/* (bez „html“, aby fungovalo i u vzorků barev v nastavení) */
[data-accent="blue"]   { --primary: #1f6feb; --primary-hover: #1959c2; }
[data-accent="green"]  { --primary: #1a7f37; --primary-hover: #166b2e; }
[data-accent="purple"] { --primary: #8250df; --primary-hover: #6e40c9; }
[data-accent="orange"] { --primary: #c25a00; --primary-hover: #a34c00; }
[data-accent="red"]    { --primary: #cf222e; --primary-hover: #a40e26; }
[data-accent="teal"]   { --primary: #0e7c86; --primary-hover: #0b636b; }

/* velikost písma, hustota, šířka */
html[data-font="s"] { --font-size: 13.5px; }
html[data-font="l"] { --font-size: 17px; }
html[data-density="compact"] { --card-pad: 10px 12px; --gap: 10px; --cell-pad: .28rem .45rem; }
html[data-width="full"] { --content-max: none; }

* { box-sizing: border-box; }
html { font-size: var(--font-size); }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.45;
}
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 1.5rem; margin: 0 0 1rem; display: flex; align-items: center; gap: .5rem; flex-wrap: wrap; }
h2 { font-size: 1.1rem; margin: 0 0 .8rem; }
h3 { font-size: .95rem; margin: 1rem 0 .4rem; }
code, .mono { font-family: ui-monospace, Consolas, monospace; font-size: .9em; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }

/* ---- horní lišta ---- */
.topbar { background: var(--topbar); color: #fff; }
.topbar-inner {
  max-width: var(--content-max); margin: 0 auto; padding: 0 16px;
  display: flex; align-items: center; gap: 1.5rem; min-height: 52px; flex-wrap: wrap;
}
.brand { color: #fff; font-weight: 700; font-size: 1.05rem; }
.brand:hover { text-decoration: none; }
.mainnav { display: flex; gap: .25rem; flex: 1; flex-wrap: wrap; }
.mainnav a, .usernav a { color: #c9d3de; padding: .4rem .7rem; border-radius: 6px; }
.mainnav a:hover, .usernav a:hover { color: #fff; background: rgba(255,255,255,.08); text-decoration: none; }
.mainnav a.active { color: #fff; background: rgba(255,255,255,.14); }
.usernav { display: flex; align-items: center; gap: .5rem; }
.linklike { background: none; border: 0; color: #c9d3de; cursor: pointer; font: inherit; padding: .4rem .5rem; }
.linklike:hover { color: #fff; }
form.inline { display: inline; margin: 0; }

/* ---- obsah ---- */
.container { max-width: var(--content-max); margin: 0 auto; padding: 20px 16px 40px; }
html[data-density="compact"] .container { padding-top: 12px; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: var(--card-pad); margin-bottom: var(--gap);
}
.card.narrow { max-width: 520px; }
.card.empty { text-align: center; padding: 40px; color: var(--muted); }
.page-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.page-head h1 { margin: 0; }
.actions { display: flex; gap: .5rem; }
.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(360px, 1fr)); gap: var(--gap); align-items: start; }
.cols > .card, .cols > div > .card { margin-bottom: var(--gap); }
.cols > .form-actions { grid-column: 1 / -1; }

/* ---- upozornění a štítky ---- */
.alert { padding: .7rem 1rem; border-radius: 6px; margin-bottom: 1rem; border: 1px solid transparent; }
.alert-success { background: var(--ok-bg); color: var(--ok); border-color: var(--ok-border); }
.alert-error { background: var(--err-bg); color: var(--err); border-color: var(--err-border); }
.badge { display: inline-block; font-size: .75rem; font-weight: 600; padding: .1rem .5rem; border-radius: 999px; vertical-align: middle; }
.badge-ok { background: var(--ok-bg); color: var(--ok); }
.badge-err { background: var(--err-bg); color: var(--err); }
.badge-muted { background: var(--muted-bg); color: var(--muted); }

/* ---- formuláře ---- */
label { display: block; margin-bottom: .8rem; font-weight: 500; }
label.check { display: flex; align-items: center; gap: .5rem; font-weight: 400; margin-bottom: .4rem; }
input[type=text], input[type=password], input[type=number], input[type=search], input[type=datetime-local], select, textarea {
  display: block; width: 100%; margin-top: .25rem; padding: .5rem .6rem;
  border: 1px solid var(--border); border-radius: 6px; font: inherit; background: var(--input-bg); color: var(--text);
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--focus); border-color: var(--primary); }
input[type=date] { padding: .35rem .45rem; border: 1px solid var(--border); border-radius: 6px; background: var(--input-bg); color: var(--text); font: inherit; }
input[readonly] { background: var(--muted-bg); }
textarea { resize: vertical; }
.w-sm { max-width: 90px; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.input-group { display: flex; gap: .5rem; align-items: center; }
.input-group input { margin-top: 0; }
.input-group .btn { white-space: nowrap; }
.check-list { max-height: 360px; overflow: auto; }
.form-actions { display: flex; gap: .5rem; justify-content: space-between; margin-top: .5rem; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .3rem;
  padding: .5rem 1rem; border: 1px solid var(--border); border-radius: 6px;
  background: var(--btn-bg); color: var(--text); font: inherit; font-weight: 500; cursor: pointer;
}
.btn:hover { background: var(--muted-bg); text-decoration: none; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-danger { color: var(--err); border-color: var(--err-border); }
.btn-danger:hover { background: var(--err-bg); }
.btn-sm { padding: .3rem .65rem; font-size: .85rem; }
.btn-block { width: 100%; }
.btn.active { background: var(--primary); border-color: var(--primary); color: #fff; }

.login-box { max-width: 380px; margin: 60px auto; padding: 28px; }

/* ---- tabulky ---- */
.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: var(--cell-pad); border-bottom: 1px solid var(--border); text-align: left; vertical-align: middle; }
.table th { font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); font-weight: 600; }
.table tbody tr:hover { background: var(--hover-bg); }
.table input { margin-top: 0; padding: .3rem .45rem; }
.num { text-align: right !important; white-space: nowrap; }
.kv { border-collapse: collapse; width: 100%; margin: .5rem 0; }
.kv th, .kv td { padding: .25rem 0; text-align: left; vertical-align: top; }
.kv th { color: var(--muted); font-weight: 400; padding-right: 1rem; width: 45%; }

/* ---- přehled zařízení ---- */
.device-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--gap); }
.device-card { color: var(--text); display: block; margin: 0; border-top: 3px solid var(--border); transition: box-shadow .15s; }
.device-card:hover { text-decoration: none; box-shadow: var(--shadow-hover); }
.device-card.status-online { border-top-color: var(--ok); }
.device-card.status-offline { border-top-color: var(--err); background: var(--offline-bg); }
.device-card-head { display: flex; justify-content: space-between; align-items: center; gap: .5rem; }
.device-card .kv td { text-align: right; font-variant-numeric: tabular-nums; }

/* ---- grafy ---- */
.chart-layout { display: grid; grid-template-columns: 280px 1fr; gap: var(--gap); align-items: start; }
.chart-side { position: sticky; top: 12px; max-height: calc(100vh - 24px); display: flex; flex-direction: column; }
.key-filter { margin: 0 0 .6rem; }
.key-tree { overflow: auto; }
.key-group summary { cursor: pointer; font-weight: 600; padding: .3rem 0; }
.key-item { display: flex; gap: .45rem; align-items: center; font-weight: 400; margin: 0 0 .15rem .9rem; font-size: .92rem; cursor: pointer; }
.key-item[hidden] { display: none; }
.chart-toolbar { display: flex; flex-wrap: wrap; gap: .8rem 1.2rem; align-items: flex-end; justify-content: space-between; margin-bottom: .8rem; }
.range-presets { display: flex; gap: .3rem; flex-wrap: wrap; }
.range-custom { display: flex; gap: .5rem; align-items: flex-end; flex-wrap: wrap; }
.range-custom label { margin: 0; font-size: .85rem; }
.range-custom input { padding: .3rem .45rem; }
.chart { width: 100%; height: calc(100vh - 230px); min-height: 380px; }
.chart-info { margin-top: .4rem; }

@media (max-width: 800px) {
  .chart-layout { grid-template-columns: 1fr; }
  .chart-side { position: static; max-height: 320px; }
  .chart { height: 420px; }
  .cols { grid-template-columns: 1fr; }
  .row2 { grid-template-columns: 1fr; }
  .topbar-inner { gap: .5rem 1rem; padding: 8px 16px; }
}

/* ---- logo, správa dat, log ---- */
.brand { display: flex; align-items: center; }
.brand-logo { display: inline-flex; align-items: center; background: #fff; border-radius: 6px; padding: 3px 8px; height: 40px; }
.brand-logo img { max-height: 34px; max-width: 200px; display: block; }
.logo-preview { background: var(--muted-bg); border-radius: 6px; padding: 10px; margin: -.3rem 0 .6rem; display: inline-block; }
.logo-preview img { max-height: 60px; max-width: 240px; display: block; }
.perm-table td, .perm-table th { padding: .35rem .5rem; }
.perm-table td.c, .perm-table th.c { text-align: center; width: 90px; }
.danger-zone { border-color: var(--err-border); }
.danger-zone h2 { color: var(--err); }
.confirm-box { background: var(--err-bg); border: 1px solid var(--err-border); border-radius: 6px; padding: 12px 14px; margin: .5rem 0 1rem; }
.filters { display: flex; flex-wrap: wrap; gap: .6rem; align-items: flex-end; }
.filters label { margin: 0; font-size: .85rem; }
.filters input, .filters select { padding: .35rem .45rem; }
.pager { display: flex; gap: .4rem; align-items: center; margin-top: .8rem; }
.log-details { max-width: 520px; word-break: break-word; }
pre.csv-sample { background: var(--muted-bg); padding: .6rem .8rem; border-radius: 6px; overflow-x: auto; font-size: .85rem; }

/* ---- grafy: výběr veličin ---- */
.side-head { display: flex; justify-content: space-between; align-items: baseline; gap: .5rem; }
.side-head h2 { margin-bottom: .5rem; }
.filter-help { margin: -.3rem 0 .5rem; }
.filter-help summary { cursor: pointer; font-size: .8rem; }
.filter-help ul { margin: .3rem 0 .3rem 1rem; padding: 0; }
.filter-help code { background: var(--muted-bg); padding: 0 .25rem; border-radius: 3px; }
.side-tools { display: flex; flex-wrap: wrap; gap: .35rem; align-items: center; margin-bottom: .6rem; }
.side-tools label.check { margin: 0 0 0 .2rem; }
.key-group summary { display: flex; align-items: center; gap: .35rem; }
.key-group summary .group-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.key-group[hidden] { display: none; }
.group-tools { margin-left: auto; display: inline-flex; gap: .15rem; font-weight: 400; }
.linkbtn { background: none; border: 0; padding: 0 .25rem; color: var(--link); font: inherit; font-size: .8rem; cursor: pointer; }
.linkbtn:hover { text-decoration: underline; }
.chart-options { display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; }
.chart-options label { margin: 0; }
.chart-options label.check { margin: 0; }
.chart-options select { display: inline-block; width: auto; margin: 0 0 0 .3rem; padding: .25rem .4rem; }

/* ---- nastavení vzhledu ---- */
.pref-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: .2rem 1rem; }
.pref-field { margin-bottom: .8rem; font-weight: 500; }
.accent-swatches { display: flex; gap: .4rem; flex-wrap: wrap; margin-top: .3rem; }
.accent-swatches label { margin: 0; cursor: pointer; }
.accent-swatches input { position: absolute; opacity: 0; pointer-events: none; }
.accent-swatches span { display: block; width: 28px; height: 28px; border-radius: 50%; border: 2px solid var(--surface); box-shadow: 0 0 0 1px var(--border); }
.accent-swatches input:checked + span { box-shadow: 0 0 0 2px var(--text); }
.accent-swatches input:focus-visible + span { outline: 2px solid var(--focus); outline-offset: 2px; }

/* ---- hlavička zařízení se záložkami ---- */
.device-head { margin-bottom: var(--gap); }
.device-head h1 { margin-bottom: .6rem; }
.tabs { display: flex; gap: .2rem; border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.tabs a { padding: .45rem .9rem; color: var(--muted); border-bottom: 2px solid transparent; margin-bottom: -1px; border-radius: 6px 6px 0 0; }
.tabs a:hover { color: var(--text); background: var(--hover-bg); text-decoration: none; }
.tabs a.active { color: var(--text); border-bottom-color: var(--primary); font-weight: 600; }

/* ---- průběh importu ---- */
.progress { height: 10px; background: var(--muted-bg); border-radius: 999px; overflow: hidden; margin: .6rem 0 .3rem; }
.progress > div { height: 100%; width: 0; background: var(--primary); transition: width .3s; }
.progress.indeterminate > div { width: 30%; animation: progress-slide 1.2s ease-in-out infinite; }
@keyframes progress-slide { 0% { margin-left: -30%; } 100% { margin-left: 100%; } }

/* ---- meze os Y ---- */
.axis-limits { display: flex; gap: .4rem 1.2rem; flex-wrap: wrap; align-items: center; font-size: .85rem; margin-top: .4rem; }
.axis-limits .axis-limit { display: flex; gap: .35rem; align-items: center; }
.axis-limits .axis-name { font-weight: 600; border-left: 3px solid var(--border); padding-left: .4rem; }
.axis-limits input { width: 90px; display: inline-block; margin: 0; padding: .25rem .4rem; }

/* ---- export s volbou období ---- */
.export-range { display: flex; flex-wrap: wrap; gap: .6rem; align-items: flex-end; margin: .4rem 0 .6rem; }
.export-range label { margin: 0; font-size: .85rem; }
.export-range select, .export-range input { padding: .35rem .45rem; }
.db-stats { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.db-stats .stat strong { display: block; font-size: 1.25rem; }
.device-place { margin: -.4rem 0 .5rem; }
.loc-group { margin-bottom: calc(var(--gap) * 1.5); }
.loc-group > h2 { display: flex; align-items: baseline; gap: .6rem; flex-wrap: wrap; font-size: 1.05rem; }
.loc-group > h2 .muted { font-weight: 400; }