:root {
  --bg: #f4f6f9;
  --surface: #ffffff;
  --text: #1c2430;
  --muted: #5f6b7a;
  --line: #dde3ea;
  --accent: #1f6feb;
  --accent-text: #ffffff;
  --ok: #1a7f37;
  --bad: #cf222e;
  --warn: #9a6700;
  --exit: #6e7781;
  --new: #e8f1ff;
  --shadow: 0 1px 3px rgba(20, 30, 50, .08);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f141a;
    --surface: #18202a;
    --text: #e6edf3;
    --muted: #8b98a7;
    --line: #2a3542;
    --accent: #4c8dff;
    --accent-text: #ffffff;
    --ok: #3fb950;
    --bad: #ff6b6b;
    --warn: #d29922;
    --exit: #8b949e;
    --new: #1d2b40;
    --shadow: none;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
}
[hidden] { display: none !important; }

.top {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 12px 16px; background: var(--surface); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 2;
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 600; }
.logo {
  display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 7px;
  background: var(--accent); color: var(--accent-text); font-size: 12px; font-weight: 700;
}
.who { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; justify-content: flex-end; color: var(--muted); font-size: 14px; }
.who #whoSite { color: var(--text); font-weight: 600; }

main { max-width: 760px; margin: 0 auto; padding: 16px; }

.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 20px; box-shadow: var(--shadow);
}
.narrow { max-width: 420px; margin: 32px auto; }
h1 { font-size: 20px; margin: 0 0 6px; }
.muted { color: var(--muted); }
.status { margin: 0 0 14px; color: var(--muted); font-size: 14px; }
.status.on::before, .status.off::before { content: ""; display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 6px; }
.status.on::before { background: var(--ok); }
.status.off::before { background: var(--bad); }

form { display: grid; gap: 8px; margin-top: 12px; }
label { font-size: 13px; color: var(--muted); }
input:not([type="checkbox"]) {
  font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--line); border-radius: 8px;
  padding: 10px 12px; width: 100%;
}
input:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
#key { font-family: ui-monospace, Consolas, monospace; letter-spacing: .5px; }
.check { display: flex; align-items: center; gap: 8px; color: var(--text); font-size: 14px; margin: 4px 0; }

.btn {
  font: inherit; font-weight: 600; border: 0; border-radius: 8px; padding: 10px 14px; cursor: pointer;
  background: var(--accent); color: var(--accent-text); margin-top: 6px;
}
.btn:disabled { opacity: .6; cursor: default; }
.btn.small { padding: 7px 12px; margin: 0; font-size: 14px; }
.link { font: inherit; background: none; border: 0; color: var(--accent); cursor: pointer; padding: 4px 0; font-size: 14px; }
.error { color: var(--bad); margin: 6px 0 0; font-size: 14px; }

.banner {
  background: var(--bad); color: #fff; padding: 10px 16px; text-align: center; font-size: 14px;
}

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 12px; }
.tab {
  font: inherit; background: none; border: 0; border-bottom: 2px solid transparent; color: var(--muted);
  padding: 10px 14px; cursor: pointer; font-weight: 600;
}
.tab[aria-selected="true"] { color: var(--text); border-bottom-color: var(--accent); }

.panel-head { display: flex; justify-content: flex-end; margin-bottom: 8px; }
.live { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); font-size: 13px; }
.live .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); animation: pulse 2s infinite; }
@keyframes pulse { 50% { opacity: .3; } }

.events, .doors { list-style: none; margin: 0; padding: 0; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.events li, .doors li { display: flex; align-items: center; gap: 12px; padding: 10px 14px; border-top: 1px solid var(--line); }
.events li:first-child, .doors li:first-child { border-top: 0; }
.events li.new { background: var(--new); transition: background 2s; }
.events .time { font-variant-numeric: tabular-nums; color: var(--muted); font-size: 13px; min-width: 64px; }
.events .main { flex: 1; min-width: 0; }
.events .what { font-weight: 600; }
.events .where { color: var(--muted); font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cat { width: 4px; align-self: stretch; border-radius: 2px; background: var(--line); }
.cat.Valid { background: var(--ok); }
.cat.Invalid, .cat.Alarm { background: var(--bad); }
.cat.Warning { background: var(--warn); }
.cat.Exit { background: var(--exit); }

.doors .main { flex: 1; min-width: 0; }
.doors .name { font-weight: 600; }
.doors .sub { color: var(--muted); font-size: 13px; }
.mode { font-size: 12px; padding: 2px 8px; border-radius: 10px; border: 1px solid var(--line); color: var(--muted); white-space: nowrap; }
.mode.OpenConstantly { color: var(--ok); border-color: var(--ok); }
.mode.LockedConstantly { color: var(--bad); border-color: var(--bad); }

.empty { text-align: center; padding: 24px; }

/* users / visitors */
.toolbar { display: flex; gap: 10px; align-items: center; margin-bottom: 10px; flex-wrap: wrap; }
.toolbar input[type="search"] { flex: 1; min-width: 160px; }
.check.small { font-size: 13px; color: var(--muted); margin: 0; }
.users { list-style: none; margin: 0; padding: 0; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.users li { display: flex; align-items: center; gap: 12px; padding: 10px 14px; border-top: 1px solid var(--line); cursor: pointer; }
.users li:first-child { border-top: 0; }
.users li:hover, .users li:focus-visible { background: var(--new); outline: none; }
.users li.inactive { opacity: .55; }
.users .main { flex: 1; min-width: 0; }
.users .name { font-weight: 600; }
.users .sub { color: var(--muted); font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.badge { font-size: 12px; padding: 2px 8px; border-radius: 10px; border: 1px solid var(--accent); color: var(--accent); white-space: nowrap; }
.badge.off { border-color: var(--line); color: var(--muted); }

#userForm h2 { font-size: 20px; margin: 4px 0 14px; }
.form-head { display: flex; justify-content: space-between; align-items: center; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 16px; margin-bottom: 12px; }
.grid2 > div { display: grid; gap: 4px; align-content: start; }
.grid2 .check { align-self: end; padding-bottom: 8px; }
.hint { color: var(--muted); font-size: 12px; margin: 0; }
select {
  font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 9px 10px; width: 100%;
}
select:disabled, input:disabled { opacity: .6; }
.levels { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 16px; margin: 4px 0 8px; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 8px; }
.btn.danger { background: var(--bad); }

@media (max-width: 520px) {
  .grid2, .levels { grid-template-columns: 1fr; }
}

.toast {
  position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%); max-width: calc(100% - 32px);
  background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 8px; font-size: 14px; box-shadow: 0 4px 12px rgba(0,0,0,.2);
}

@media (max-width: 480px) {
  .narrow { margin: 16px auto; }
  .who .sep, .who #whoName { display: none; }
}