:root {
  --accent: #ed2344;
  --accent-text: #b01330;
  --ink: #0d0f13;
  --ink-soft: #3c4149;
  --muted: #7a8089;
  --surface: #f7f8fa;
  --card: #ffffff;
  --line: #e3e6ea;
  --ok: #1f9d55;
  --warn: #d98c00;
  --bad: #c62828;
  --radius: 6px;
  font-family: Inter, "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--surface); color: var(--ink); font-size: 15px; line-height: 1.45; }
a { color: var(--accent-text); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: 0.95em; background: #eef0f3; padding: 0.1em 0.35em; border-radius: 4px; }
h1 { font-size: 1.6rem; font-weight: 600; margin: 0 0 1rem; letter-spacing: -0.01em; }
h2 { font-size: 1.05rem; font-weight: 600; margin: 1.75rem 0 0.75rem; color: var(--ink-soft); }
small { display: block; color: var(--muted); font-size: 0.85rem; margin-top: 0.25rem; }

.topbar { background: var(--ink); color: #fff; display: flex; align-items: center; justify-content: space-between; padding: 0 1.25rem; height: 56px; border-bottom: 3px solid var(--accent); }
.brand { display: flex; align-items: baseline; gap: 0.5rem; color: #fff; }
.brand__mark { font-weight: 800; letter-spacing: 0.12em; font-size: 1.05rem; }
.brand__sub { color: #c9ccd2; font-size: 0.9rem; }
.nav { display: flex; align-items: center; gap: 0.25rem; }
.nav__link { color: #d7dae0; padding: 0.4rem 0.75rem; border-radius: var(--radius); }
.nav__link:hover { color: #fff; background: rgba(255,255,255,0.08); text-decoration: none; }
.nav__link.is-active { color: #fff; box-shadow: inset 0 -3px 0 var(--accent); border-radius: 0; }
.nav__logout { margin-left: 0.75rem; }

.page { max-width: 1100px; margin: 0 auto; padding: 1.5rem 1.25rem 3rem; }
.page__head { display: flex; align-items: center; gap: 1rem; justify-content: space-between; flex-wrap: wrap; }
.page__head h1 { margin: 0; }

.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; margin: 1rem 0 1.5rem; }
.kpi { background: var(--card); border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: var(--radius); padding: 0.9rem 1rem; }
.kpi__value { font-size: 1.7rem; font-weight: 600; font-variant-numeric: tabular-nums; letter-spacing: -0.02em; }
.kpi__value--text { font-size: 1.15rem; word-break: break-all; }
.kpi__of { color: var(--muted); font-size: 1rem; font-weight: 400; }
.kpi__label { color: var(--muted); font-size: 0.85rem; margin-top: 0.15rem; }

.table { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.table th, .table td { padding: 0.6rem 0.75rem; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.table th { font-size: 0.78rem; text-transform: none; color: var(--muted); font-weight: 600; background: #fbfbfc; }
.table tr:last-child td { border-bottom: 0; }
.table .num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.muted { color: var(--muted); font-size: 0.85rem; }
.empty { color: var(--muted); background: var(--card); border: 1px dashed var(--line); padding: 1rem; border-radius: var(--radius); }

.dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin-right: 0.35rem; vertical-align: 1px; }
.dot--on { background: var(--ok); box-shadow: 0 0 0 3px rgba(31,157,85,0.15); }
.dot--off { background: #b6bbc2; }
.rtt-good { color: var(--ok); } .rtt-ok { color: var(--warn); } .rtt-bad { color: var(--bad); } .rtt-none { color: var(--muted); }
.tag { display: inline-block; font-size: 0.75rem; padding: 0.1rem 0.5rem; border-radius: 999px; font-weight: 600; }
.tag--on { background: rgba(31,157,85,0.12); color: var(--ok); }
.tag--off { background: rgba(198,40,40,0.1); color: var(--bad); }

.form { display: flex; flex-direction: column; gap: 0.9rem; max-width: 420px; }
.field { display: flex; flex-direction: column; gap: 0.3rem; }
.field > span { font-size: 0.85rem; color: var(--ink-soft); font-weight: 500; }
.field input, .field select { font: inherit; padding: 0.5rem 0.65rem; border: 1px solid #c8cdd3; border-radius: var(--radius); background: #fff; }
.field input:focus, .field select:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
.field--check { flex-direction: row; align-items: center; gap: 0.5rem; }
.form__error { background: rgba(198,40,40,0.08); color: var(--bad); border-left: 3px solid var(--bad); padding: 0.6rem 0.8rem; border-radius: var(--radius); margin: 0 0 1rem; }
.flash { padding: 0.6rem 0.8rem; border-radius: var(--radius); margin-bottom: 1rem; }
.flash--ok { background: rgba(31,157,85,0.1); color: var(--ok); }

.btn { display: inline-block; font: inherit; font-weight: 600; padding: 0.5rem 0.95rem; border-radius: var(--radius); border: 1px solid #c8cdd3; background: #fff; color: var(--ink); cursor: pointer; }
.btn:hover { background: #f1f3f5; text-decoration: none; }
.btn--primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn--primary:hover { background: #d31c3c; }
.btn--ghost { background: transparent; border-color: rgba(255,255,255,0.25); color: #d7dae0; }
.btn--ghost:hover { background: rgba(255,255,255,0.08); color: #fff; }
.btn--danger { color: var(--bad); border-color: rgba(198,40,40,0.4); }
.btn--danger:hover { background: rgba(198,40,40,0.08); }

.login { max-width: 360px; margin: 4rem auto; background: var(--card); border: 1px solid var(--line); border-top: 3px solid var(--accent); border-radius: var(--radius); padding: 1.5rem; }
.login__title { margin-bottom: 1rem; }

.secret-panel { background: #fff7f8; border: 1px solid #f3c2cb; border-left: 3px solid var(--accent); border-radius: var(--radius); padding: 1rem 1.25rem; margin: 1rem 0 1.5rem; }
.secret-panel h2 { margin-top: 0; color: var(--accent-text); }
.secret { font-size: 1.15rem; letter-spacing: 0.04em; background: #fff; border: 1px solid #f3c2cb; user-select: all; }
.kv { display: grid; grid-template-columns: max-content 1fr; gap: 0.4rem 1.25rem; margin: 0.75rem 0; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; }
.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }

@media (max-width: 640px) {
  .topbar { padding: 0 0.75rem; }
  .brand__sub { display: none; }
  .table { display: block; overflow-x: auto; }
}