:root {
    --bg: #f6f7f9;
    --card: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --line: #e5e7eb;
    --line-soft: #f1f3f5;
    --accent: #2563eb;
    --accent-soft: #eef2ff;
    --good: #059669;
    --good-soft: #ecfdf5;
    --warn: #b45309;
    --warn-soft: #fffbeb;
    --bad: #dc2626;
    --bad-soft: #fef2f2;
    --radius: 10px;
    --shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
    --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
    font-size: 14px;
    line-height: 1.5;
    background: var(--bg);
    color: var(--text);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: var(--mono); font-size: 0.92em; background: var(--line-soft);
       padding: 1px 5px; border-radius: 4px; }
h1 { font-size: 22px; margin: 0 0 4px; }
h2 { font-size: 16px; margin: 0 0 12px; }
h3 { font-size: 14px; margin: 0 0 8px; }
p { margin: 0 0 10px; }

/* ---------- Topbar ---------- */

.topbar {
    display: flex; align-items: center; gap: 20px;
    background: var(--card); border-bottom: 1px solid var(--line);
    padding: 0 20px; height: 52px; position: sticky; top: 0; z-index: 20;
}
.brand { font-weight: 700; color: var(--text); font-size: 15px; }
.brand:hover { text-decoration: none; }
.nav { display: flex; gap: 2px; flex: 1; overflow-x: auto; }
.nav__link {
    padding: 6px 11px; border-radius: 7px; color: var(--muted);
    font-size: 13px; white-space: nowrap;
}
.nav__link:hover { background: var(--line-soft); color: var(--text); text-decoration: none; }
.nav__link.is-active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.topbar__right { display: flex; align-items: center; gap: 10px; }
.who { color: var(--muted); font-size: 12px; }

/* ---------- Layout ---------- */

.page { max-width: 1400px; margin: 0 auto; padding: 22px 20px 60px; }
.page--narrow { max-width: 460px; margin: 12vh auto 0; }
.page-head { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 18px;
             flex-wrap: wrap; }
.page-head__text { flex: 1; min-width: 240px; }
.page-head__actions { display: flex; gap: 8px; align-items: center; }
.page-head p { color: var(--muted); margin: 0; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
        padding: 16px 18px; box-shadow: var(--shadow); }
.card + .card { margin-top: 16px; }
.card__head { display: flex; align-items: center; justify-content: space-between;
              gap: 12px; margin-bottom: 12px; }
.card__head h2, .card__head h3 { margin: 0; }

.grid { display: grid; gap: 16px; }
.grid--cards { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.grid--halves { grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); }
.grid--kpi { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
.stack { display: flex; flex-direction: column; gap: 16px; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

/* ---------- KPI ---------- */

.kpi { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
       padding: 12px 16px; box-shadow: var(--shadow); }
.kpi__v { font-size: 22px; font-weight: 700; letter-spacing: -0.02em; }
.kpi__l { color: var(--muted); font-size: 12px; }
.kpi__d { font-size: 12px; font-weight: 600; }
.is-up { color: var(--good); }
.is-down { color: var(--bad); }
.is-flat { color: var(--muted); }

/* ---------- Tables ---------- */

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 7px 10px; border-bottom: 1px solid var(--line-soft); text-align: left;
         vertical-align: top; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: 0.03em; color: var(--muted);
     font-weight: 600; background: #fafbfc; position: sticky; top: 0; }
tbody tr:hover { background: #fcfcfd; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
td.mono { font-family: var(--mono); font-size: 12px; }
.table-empty { color: var(--muted); padding: 18px 4px; text-align: center; }

/* ---------- Сортируемые заголовки ---------- */

th.sortable { padding: 0; }
th.sortable a {
    display: flex; align-items: center; gap: 4px;
    padding: 7px 10px; color: inherit; text-decoration: none;
    cursor: pointer; user-select: none;
}
th.sortable a:hover { color: var(--accent); background: var(--line-soft); }
th.sortable.num a { justify-content: flex-end; }
th.sortable.is-sorted a { color: var(--accent); }
.sort-arrow { font-size: 9px; opacity: 0.45; line-height: 1; }
th.sortable.is-sorted .sort-arrow { opacity: 1; }
th.sortable a:hover .sort-arrow { opacity: 0.8; }

/* ---------- Badges ---------- */

.badge { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 11px;
         font-weight: 600; background: var(--line-soft); color: var(--muted);
         white-space: nowrap; }
.badge--accent { background: var(--accent-soft); color: var(--accent); }
.badge--good { background: var(--good-soft); color: var(--good); }
.badge--warn { background: var(--warn-soft); color: var(--warn); }
.badge--bad { background: var(--bad-soft); color: var(--bad); }
.badge--count { background: var(--line); color: var(--muted); }
.sev-critical { color: var(--bad); font-weight: 600; }
.sev-high { color: var(--warn); font-weight: 600; }
.sev-medium { color: var(--text); }
.sev-low { color: var(--muted); }

/* ---------- Forms ---------- */

.form-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.field { display: flex; flex-direction: column; gap: 4px; }
.field--wide { grid-column: 1 / -1; }
.field label { font-size: 12px; font-weight: 600; color: var(--text); }
.field .hint { font-size: 11px; color: var(--muted); }
input[type="text"], input[type="password"], input[type="number"], input[type="search"],
select, textarea {
    width: 100%; padding: 7px 10px; border: 1px solid var(--line); border-radius: 7px;
    font: inherit; background: #fff; color: var(--text);
}
input:focus, select:focus, textarea:focus {
    outline: none; border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}
textarea { min-height: 90px; resize: vertical; font-family: var(--mono); font-size: 12px; }
.checkbox { display: flex; align-items: center; gap: 7px; font-size: 13px; }
.checkbox input { width: auto; }
fieldset { border: 0; padding: 0; margin: 0 0 20px; }
legend { font-size: 13px; font-weight: 700; padding: 0; margin-bottom: 8px;
         text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }

.btn {
    display: inline-flex; align-items: center; gap: 6px; padding: 7px 14px;
    border: 1px solid transparent; border-radius: 7px; background: var(--accent);
    color: #fff; font: inherit; font-size: 13px; font-weight: 600; cursor: pointer;
}
.btn:hover { filter: brightness(1.07); text-decoration: none; }
.btn--secondary { background: #fff; color: var(--text); border-color: var(--line); }
.btn--secondary:hover { background: var(--line-soft); }
.btn--danger { background: var(--bad); }
.btn--ghost { background: transparent; color: var(--muted); border-color: var(--line); }
.btn--ghost:hover { background: var(--line-soft); }
.btn--sm { padding: 3px 9px; font-size: 12px; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }
.inline-form { display: inline; }

.filters { display: flex; gap: 8px; align-items: flex-end; flex-wrap: wrap;
           margin-bottom: 14px; }
.filters .field { min-width: 140px; }

/* ---------- Banners ---------- */

.banner { padding: 9px 14px; border-radius: 8px; font-size: 13px; margin: 14px 20px 0;
         border: 1px solid transparent; }
.page .banner { margin: 0 0 16px; }
.banner--success { background: var(--good-soft); color: var(--good); border-color: #a7f3d0; }
.banner--error { background: var(--bad-soft); color: var(--bad); border-color: #fecaca; }
.banner--warning { background: var(--warn-soft); color: var(--warn); border-color: #fde68a; }
.banner--info { background: var(--accent-soft); color: var(--accent); border-color: #c7d2fe; }
.banner--warn { background: var(--warn-soft); color: var(--warn); border-color: #fde68a; }

.muted { color: var(--muted); }
.small { font-size: 12px; }
.mt { margin-top: 16px; }
.mb { margin-bottom: 12px; }
.right { text-align: right; }
.nowrap { white-space: nowrap; }
.truncate { max-width: 340px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------- Charts ---------- */

.charts { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(360px, 1fr)); }
.plot { min-height: 260px; }

/* ---------- Misc ---------- */

.split { display: grid; gap: 16px; grid-template-columns: 260px 1fr; align-items: start; }
.side { position: sticky; top: 72px; }
.login-card { background: var(--card); border: 1px solid var(--line); border-radius: 12px;
              padding: 26px; box-shadow: 0 4px 16px rgba(15, 23, 42, 0.08); }
.login-card h1 { margin-bottom: 6px; }
details.inline { display: inline; }
details.inline > summary { cursor: pointer; list-style: none; }
details.inline > summary::-webkit-details-marker { display: none; }

.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--line); margin-bottom: 16px;
        overflow-x: auto; }
.tabs a { padding: 7px 13px; font-size: 13px; color: var(--muted);
          border-bottom: 2px solid transparent; }
.tabs a:hover { color: var(--text); text-decoration: none; }
.tabs a.is-active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }

.pager { display: flex; gap: 8px; align-items: center; justify-content: flex-end;
         margin-top: 12px; font-size: 13px; }

@media (max-width: 860px) {
    .split { grid-template-columns: 1fr; }
    .side { position: static; }
    .topbar { height: auto; flex-wrap: wrap; padding: 8px 12px; }
}