:root {
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --text-primary: #0b0b0b;
  --text-secondary: #52514e;
  --muted: #898781;
  --grid: #e1e0d9;
  --baseline: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --series-1: #2a78d6;
  --series-1-fill: rgba(42, 120, 214, 0.12);

  --good: #0ca30c;
  --warning: #fab219;
  --serious: #ec835a;
  --critical: #d03b3b;

  --radius: 10px;
  --font: system-ui, -apple-system, "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #0d0d0d;
    --surface: #1a1a19;
    --text-primary: #ffffff;
    --text-secondary: #c3c2b7;
    --muted: #898781;
    --grid: #2c2c2a;
    --baseline: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --series-1: #3987e5;
    --series-1-fill: rgba(57, 135, 229, 0.16);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--page);
  color: var(--text-primary);
  font-size: 15px;
  line-height: 1.45;
}

a { color: var(--series-1); text-decoration: none; }
a:hover { text-decoration: underline; }

header.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 28px;
  height: 56px;
}
.topbar .brand { font-weight: 700; letter-spacing: -0.01em; }
.topbar nav { display: flex; gap: 20px; }
.topbar nav a { color: var(--text-secondary); font-weight: 500; }
.topbar nav a.active { color: var(--text-primary); }
.topbar-user { margin-left: auto; display: flex; align-items: center; gap: 16px;
               font-size: 13.5px; }
.updated { color: var(--muted); font-size: 12.5px; }
.updated time { font-variant-numeric: tabular-nums; }
.whoami { color: var(--text-secondary); }
.role-tag { color: var(--muted); font-size: 12px; border: 1px solid var(--border);
            border-radius: 999px; padding: 1px 8px; margin-left: 4px; }
.logout { color: var(--text-secondary); font-weight: 500; }

/* Login page */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center;
              padding: 24px; }
.login-card { background: var(--surface); border: 1px solid var(--border);
              border-radius: 14px; padding: 32px 30px; width: 100%; max-width: 360px;
              box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
.login-brand { font-weight: 700; font-size: 17px; }
.login-sub { color: var(--muted); margin: 4px 0 22px; font-size: 14px; }
.login-error { background: color-mix(in srgb, var(--critical) 12%, transparent);
               color: var(--critical); border: 1px solid color-mix(in srgb, var(--critical) 35%, transparent);
               border-radius: 8px; padding: 9px 12px; font-size: 13.5px; margin-bottom: 16px; }
.field { display: block; margin-bottom: 14px; }
.field span { display: block; font-size: 13px; color: var(--text-secondary);
              margin-bottom: 5px; }
.field input { width: 100%; padding: 10px 12px; border: 1px solid var(--baseline);
               border-radius: 8px; background: var(--page); color: var(--text-primary);
               font-size: 15px; font-family: var(--font); }
.field select { width: 100%; padding: 10px 12px; border: 1px solid var(--baseline);
                border-radius: 8px; background: var(--page); color: var(--text-primary);
                font-size: 15px; font-family: var(--font); }
.field input:focus, .field select:focus { outline: 2px solid var(--series-1); outline-offset: 0;
                     border-color: var(--series-1); }
.form-narrow { max-width: 520px; }
.attn-controls { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 16px; }
.attn-controls .field { margin-bottom: 0; }
.attn-controls .field input[type="number"] { width: 90px; }
.attn-controls .checkbox-field { margin: 0 0 6px; }

/* Comments */
.comment-form textarea { width: 100%; padding: 10px 12px; border: 1px solid var(--baseline);
                         border-radius: 8px; background: var(--page); color: var(--text-primary);
                         font-family: var(--font); font-size: 14px; line-height: 1.5; resize: vertical; }
.comment-form .btn-inline { margin-top: 8px; }
.comment-list { list-style: none; margin: 18px 0 0; padding: 0; }
.comment { padding: 12px 0; border-top: 1px solid var(--border); }
.comment-meta { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--muted); }
.comment-author { font-weight: 600; color: var(--text-secondary); }
.comment-del { margin: 0 0 0 auto; }
.comment-body { margin-top: 5px; white-space: pre-wrap; }
.btn-link-danger { background: none; border: none; color: var(--critical); cursor: pointer;
                   font-size: 12.5px; font-family: var(--font); padding: 0; }
.btn-link-danger:hover { text-decoration: underline; }
.btn-danger { background: var(--critical); border: 1px solid var(--critical); color: #fff;
              padding: 8px 14px; border-radius: 8px; font-size: 13.5px; font-weight: 600;
              font-family: var(--font); cursor: pointer; }
.btn-danger:hover { filter: brightness(1.08); }
.loc-sub { font-size: 12px; color: var(--muted); margin-top: 2px; }
.page-head { display: flex; align-items: center; justify-content: space-between;
             gap: 16px; flex-wrap: wrap; }
.head-actions { display: flex; gap: 8px; }
.btn-primary { width: 100%; padding: 11px; border: none; border-radius: 8px;
               background: var(--series-1); color: #fff; font-size: 15px; font-weight: 600;
               font-family: var(--font); cursor: pointer; margin-top: 6px; }
.btn-primary:hover { filter: brightness(1.06); }

main { max-width: 1080px; margin: 0 auto; padding: 28px 24px 64px; }
h1 { font-size: 22px; margin: 0 0 4px; letter-spacing: -0.01em; }
.subtitle { color: var(--muted); margin: 0 0 24px; font-size: 14px; }
h2 { font-size: 15px; text-transform: uppercase; letter-spacing: 0.04em;
     color: var(--muted); margin: 32px 0 12px; font-weight: 600; }

/* Stat tiles */
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
         gap: 12px; }
.tile {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  border-left: 3px solid var(--baseline);
}
.tile .label { color: var(--muted); font-size: 13px; }
.tile .value { font-size: 30px; font-weight: 700; margin-top: 4px;
               letter-spacing: -0.02em; }
a.tile { text-decoration: none; color: inherit; display: block; transition: border-color .12s, transform .12s; }
a.tile:hover { border-color: var(--series-1); transform: translateY(-1px); text-decoration: none; }
.tile.good { border-left-color: var(--good); }
.tile.warning { border-left-color: var(--warning); }
.tile.serious { border-left-color: var(--serious); }
.tile.critical { border-left-color: var(--critical); }
.tile.accent { border-left-color: var(--series-1); }

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 16px;
}

/* Tables */
table { width: 100%; border-collapse: collapse; }
.table-wrap { overflow-x: auto; }
th {
  text-align: left; font-size: 12px; text-transform: uppercase;
  letter-spacing: 0.04em; color: var(--muted); font-weight: 600;
  padding: 10px 12px; border-bottom: 1px solid var(--border); white-space: nowrap;
}
td { padding: 11px 12px; border-bottom: 1px solid var(--border);
     font-variant-numeric: tabular-nums; }
tr:last-child td { border-bottom: none; }
tbody tr:hover { background: color-mix(in srgb, var(--series-1) 6%, transparent); }

/* Status badges (icon + label, never colour alone) */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12.5px; font-weight: 600; padding: 2px 9px 2px 7px;
  border-radius: 999px; white-space: nowrap;
  border: 1px solid var(--border);
}
.badge .dot { width: 8px; height: 8px; border-radius: 50%; background: currentColor; }
.badge.good { color: var(--good); }
.badge.warning { color: #9a6b00; }
.badge.serious { color: #b4551f; }
.badge.critical { color: var(--critical); }
.badge.muted { color: var(--muted); }
@media (prefers-color-scheme: dark) {
  .badge.warning { color: var(--warning); }
  .badge.serious { color: var(--serious); }
}

.pill-online { color: var(--good); font-weight: 600; }
.pill-offline { color: var(--muted); font-weight: 600; }

/* Charts */
.chart-grid-3 { display: grid; grid-template-columns: 1fr; gap: 16px; }
.chart-title { font-size: 13px; color: var(--text-secondary); font-weight: 600;
               margin: 0 0 8px; }
svg.chart { width: 100%; height: auto; display: block; }
.chart-grid { stroke: var(--grid); stroke-width: 1; }
.chart-axis { fill: var(--muted); font-size: 11px; font-family: var(--font);
              font-variant-numeric: tabular-nums; }
.chart-area { fill: var(--series-1-fill); stroke: none; }
.chart-line { fill: none; stroke: var(--series-1); stroke-width: 2;
              stroke-linejoin: round; stroke-linecap: round; }
.chart-end { fill: var(--series-1); }
.chart-endlabel { fill: var(--text-primary); font-size: 12px; font-weight: 700;
                  text-anchor: end; font-family: var(--font); }
.chart-hit { fill: transparent; }
.chart-empty { color: var(--muted); font-size: 14px; padding: 24px 0; text-align: center; }

/* Device header */
.device-head { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; }
.meta-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
             gap: 14px 24px; }
.meta .k { color: var(--muted); font-size: 12.5px; }
.meta .v { font-weight: 600; }
.empty-state { color: var(--muted); padding: 40px 0; text-align: center; }
.mono { font-variant-numeric: tabular-nums; }

/* Alert row actions */
.row-actions { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.row-actions form { margin: 0; }

/* Users page */
.user-form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
                  gap: 12px; margin-bottom: 14px; }
.inline-reset { display: flex; gap: 6px; align-items: center; }
.inline-reset input { padding: 4px 8px; border: 1px solid var(--border); border-radius: 6px;
                      background: var(--surface); color: var(--text); font-size: 12.5px;
                      font-family: var(--font); width: 130px; }
.muted-text { color: var(--muted); }
.btn-sm { padding: 4px 10px; border: 1px solid var(--baseline); border-radius: 6px;
          background: var(--surface); color: var(--text-secondary); font-size: 12.5px;
          font-family: var(--font); cursor: pointer; white-space: nowrap; }
.btn-sm:hover { border-color: var(--series-1); color: var(--series-1); }
.btn-sm-primary { background: var(--series-1); border-color: var(--series-1); color: #fff; }
.btn-sm-primary:hover { filter: brightness(1.06); color: #fff; }
.subtitle a { color: var(--text-secondary); }
.subtitle a.active-filter { color: var(--text-primary); font-weight: 700; }

/* Settings forms */
.notice-ok { background: color-mix(in srgb, var(--good) 12%, transparent);
             color: var(--good); border: 1px solid color-mix(in srgb, var(--good) 35%, transparent);
             border-radius: 8px; padding: 9px 12px; font-size: 13.5px; margin-bottom: 16px; }
.form-help { color: var(--muted); font-size: 13.5px; margin: 0 0 14px; }
.settings-table { width: auto; margin-bottom: 16px; }
.settings-table td, .settings-table th { padding: 8px 14px 8px 0; border: none; }
.settings-table input { width: 120px; padding: 8px 10px; border: 1px solid var(--baseline);
                        border-radius: 8px; background: var(--page); color: var(--text-primary);
                        font-size: 14px; font-family: var(--font); }
.btn-inline { width: auto; padding: 10px 18px; }
.template-body { width: 100%; padding: 12px; border: 1px solid var(--baseline);
                 border-radius: 8px; background: var(--page); color: var(--text-primary);
                 font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 13.5px;
                 line-height: 1.5; resize: vertical; }
.checkbox-field { display: flex; align-items: center; gap: 8px; margin: 4px 0 16px;
                  font-size: 14px; color: var(--text-secondary); }
.form-actions { display: flex; align-items: center; gap: 12px; }
.var-grid { display: flex; flex-wrap: wrap; gap: 8px; }
.var-chip { background: var(--page); border: 1px solid var(--border); border-radius: 6px;
            padding: 3px 8px; font-size: 12.5px; color: var(--series-1);
            font-family: ui-monospace, "SF Mono", Menlo, monospace; }