:root {
  --bg: #f6f7f9; --surface: #ffffff; --text: #16181d; --muted: #667085; --border: #e3e6eb;
  --accent: #2554d6; --accent-text: #ffffff; --pos: #0f8a4b; --neg: #c4321f; --warn: #b7791f;
  --danger: #c4321f; --grid: #eceef2; --shadow: 0 1px 2px rgba(16, 24, 40, .05);
  --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115; --surface: #171a21; --text: #e7e9ee; --muted: #98a2b3; --border: #262b35;
    --accent: #5b82f0; --accent-text: #0b0d11; --pos: #3fbf7f; --neg: #f06b57; --warn: #e0a84a;
    --danger: #e0533e; --grid: #222733; --shadow: none;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 1.5rem; margin: 0 0 1rem; }
h2 { font-size: 1.05rem; margin: 0 0 .8rem; }
h3 { font-size: .95rem; margin: 1rem 0 .5rem; }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .85em; }
pre { background: var(--bg); padding: .7rem; border-radius: 6px; overflow-x: auto; white-space: pre-wrap; word-break: break-all; }

.topbar { display: flex; align-items: center; gap: 1.5rem; padding: .7rem 1.25rem; background: var(--surface);
  border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 5; flex-wrap: wrap; }
.brand { font-weight: 700; color: var(--text); }
.topbar nav { display: flex; gap: 1rem; flex: 1; flex-wrap: wrap; }
.topbar nav a { color: var(--muted); padding: .2rem 0; }
.topbar nav a.active { color: var(--text); font-weight: 600; border-bottom: 2px solid var(--accent); }

.container { max-width: 1180px; margin: 0 auto; padding: 1.25rem 1rem 3rem; }
.auth { min-height: 100vh; display: grid; place-items: center; padding: 1rem; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.1rem 1.2rem; margin-bottom: 1rem; box-shadow: var(--shadow); min-width: 0; }
.auth-card { width: 100%; max-width: 380px; }
.wide-card { max-width: 460px; }
.muted { color: var(--muted); }
.small { font-size: .82rem; }
.pos { color: var(--pos); }
.neg { color: var(--neg); }

label { display: block; font-size: .85rem; color: var(--muted); margin-bottom: .8rem; }
label.check { display: flex; align-items: center; gap: .5rem; color: var(--text); }
input, select { display: block; width: 100%; margin-top: .3rem; padding: .55rem .65rem; font: inherit; color: var(--text);
  background: var(--bg); border: 1px solid var(--border); border-radius: 7px; }
input[type=checkbox], input[type=radio] { display: inline-block; width: auto; margin: 0; }
input:focus, select:focus, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
button { font: inherit; padding: .5rem 1rem; border-radius: 7px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text); cursor: pointer; }
button:hover { border-color: var(--muted); }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-weight: 600; }
button.danger { background: var(--danger); border-color: var(--danger); color: #fff; font-weight: 600; }
button.link { border: none; background: none; color: var(--accent); padding: 0; }
button.wide { width: 100%; margin-top: .4rem; }
form.inline { display: inline-flex; gap: .5rem; align-items: center; margin: 0; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 0 1rem; }

.notice { padding: .7rem 1rem; border-radius: 8px; margin-bottom: 1rem; border: 1px solid; }
.notice.ok { border-color: var(--pos); color: var(--pos); }
.notice.err { border-color: var(--neg); color: var(--neg); }

.bot-panel { display: flex; flex-wrap: wrap; gap: 1rem 2rem; align-items: center; justify-content: space-between; }
.bot-state { display: flex; gap: .9rem; align-items: flex-start; }
.bot-actions { display: flex; gap: .6rem; flex-wrap: wrap; }
.mode-form { display: flex; gap: .6rem; align-items: flex-end; flex-wrap: wrap; width: 100%;
  border-top: 1px solid var(--border); padding-top: .9rem; }
.mode-form .inline-label { margin: 0; flex: 1 1 220px; }
input.code { width: 8.5rem; margin: 0; display: inline-block; }
.dot-status { width: 14px; height: 14px; border-radius: 50%; margin-top: .35rem; flex: none; background: var(--muted); }
.dot-status.on { background: var(--pos); box-shadow: 0 0 0 4px color-mix(in srgb, var(--pos) 20%, transparent); }
.dot-status.warn { background: var(--warn); }
.label { font-size: .78rem; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.big { font-size: 1.35rem; font-weight: 650; }
.mode-live { color: var(--neg); }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 1rem; }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 1rem; }
.metrics { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: .6rem; margin-bottom: 1rem; }
.metric { background: var(--bg); border-radius: 8px; padding: .5rem .7rem; }
.metric .value { font-size: 1.1rem; font-weight: 600; }

table { width: 100%; border-collapse: collapse; font-size: .88rem; }
th, td { padding: .45rem .5rem; border-bottom: 1px solid var(--border); text-align: left; white-space: nowrap; }
th { color: var(--muted); font-weight: 500; font-size: .78rem; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.scroll { overflow-x: auto; max-height: 460px; overflow-y: auto; }

.chart { width: 100%; height: auto; display: block; }
.chart .grid { stroke: var(--grid); stroke-width: 1; }
.chart .baseline { stroke: var(--muted); stroke-dasharray: 4 4; stroke-width: 1; }
.chart .axis { fill: var(--muted); font-size: 11px; }
.chart .line { fill: none; stroke-width: 2; stroke-linejoin: round; }
.chart.up .line { stroke: var(--pos); } .chart.down .line { stroke: var(--neg); }
.chart.up .area { fill: color-mix(in srgb, var(--pos) 10%, transparent); }
.chart.down .area { fill: color-mix(in srgb, var(--neg) 10%, transparent); }
.chart.up .dot { fill: var(--pos); } .chart.down .dot { fill: var(--neg); }

.tabs { display: flex; gap: 1.2rem; flex-wrap: wrap; margin-bottom: 1rem; }
.tabs label { display: flex; gap: .4rem; align-items: center; color: var(--text); margin: 0; font-size: .95rem; }
.hidden { display: none !important; }
.qr { display: flex; justify-content: center; margin: .5rem 0; }
.qr svg { width: 220px; height: 220px; background: #fff; border-radius: 8px; }
.secret { word-break: break-all; }
.spinner { display: inline-block; width: 14px; height: 14px; border: 2px solid var(--border); border-top-color: var(--accent);
  border-radius: 50%; animation: spin 1s linear infinite; vertical-align: -2px; margin-right: .4rem; }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 600px) {
  .topbar { gap: .4rem 1rem; padding: .6rem 1rem; }
  .topbar nav { order: 3; flex-basis: 100%; flex-wrap: nowrap; overflow-x: auto; }
  .topbar form { margin-left: auto; }
  .grid2 { grid-template-columns: 1fr; }
  .big { font-size: 1.15rem; }
}