:root {
  --ink-950: #0B1526;
  --ink-900: #14213D;
  --ink-700: #1A3C6E;
  --ink-500: #52658A;
  --ink-300: #8A97B3;
  --ink-100: #E7EBF3;
  --paper: #FAF8F4;
  --surface: #FFFFFF;
  --line: #E4E0D6;
  --line-strong: #CBC5B4;
  --brass-700: #8A6417;
  --brass-600: #A47C1B;
  --brass-100: #F3E9D2;
  --good-700: #2E6B4F;
  --good-100: #E1EFE7;
  --bad-700: #A23B32;
  --bad-100: #F6E4E1;
  --warn-700: #93631B;
  --warn-100: #F3E9D2;
  --radius: 6px;
  --radius-lg: 10px;
  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'IBM Plex Sans', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink-900);
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--ink-700); }
h1, h2, h3 { font-family: var(--font-display); font-weight: 600; letter-spacing: -0.01em; color: var(--ink-900); }
button, input, select, textarea { font-family: inherit; }
:focus-visible { outline: 2px solid var(--brass-600); outline-offset: 2px; }

.app-shell { display: flex; min-height: 100vh; }

/* ---------- Sidebar ---------- */
.sidebar {
  width: 264px;
  background: var(--ink-950);
  color: #fff;
  padding: 24px 18px;
  display: flex;
  flex-direction: column;
  gap: 22px;
  position: sticky;
  top: 0;
  height: 100vh;
  border-right: 1px solid rgba(255,255,255,.06);
}
.brand { display: flex; align-items: center; gap: 12px; padding-bottom: 18px; border-bottom: 1px solid rgba(255,255,255,.1); }
.brand-mark {
  width: 38px; height: 38px; border-radius: var(--radius);
  background: var(--brass-600); color: var(--ink-950);
  display: grid; place-items: center;
  font-family: var(--font-display); font-weight: 600; font-size: 19px;
}
.brand strong { font-family: var(--font-display); font-size: 18px; font-weight: 600; letter-spacing: -.01em; display: block; }
.brand span { display: block; color: rgba(255,255,255,.5); font-size: 11.5px; margin-top: 1px; font-family: var(--font-mono); text-transform: uppercase; letter-spacing: .06em; }

.nav { display: flex; flex-direction: column; gap: 2px; overflow-y: auto; flex: 1; padding-right: 2px; }
.nav-group-label {
  font-family: var(--font-mono); font-size: 10.5px; text-transform: uppercase; letter-spacing: .09em;
  color: rgba(255,255,255,.38); padding: 16px 10px 6px;
}
.nav-group-label:first-child { padding-top: 2px; }
.nav button {
  border: 0; text-align: left; background: transparent; color: rgba(255,255,255,.72);
  padding: 8px 10px; border-radius: var(--radius); cursor: pointer; font-size: 13.5px;
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
}
.nav button:hover { background: rgba(255,255,255,.07); color: #fff; }
.nav button.active { background: var(--brass-600); color: var(--ink-950); font-weight: 500; }

.owner-box { background: rgba(255,255,255,.05); padding: 13px 14px; border-radius: var(--radius); border: 1px solid rgba(255,255,255,.08); }
.owner-box small { display: block; color: rgba(255,255,255,.42); font-size: 10.5px; text-transform: uppercase; letter-spacing: .06em; font-family: var(--font-mono); }
.owner-box strong { display: block; margin: 4px 0 2px; font-size: 13px; font-weight: 500; }
.owner-box a { color: var(--brass-100); font-size: 12px; text-decoration: none; }
.owner-box a:hover { text-decoration: underline; }

/* ---------- Main ---------- */
.main { flex: 1; padding: 28px 32px 60px; min-width: 0; }
.topbar {
  display: flex; align-items: flex-end; justify-content: space-between; gap: 20px;
  padding-bottom: 18px; border-bottom: 1px solid var(--line-strong); margin-bottom: 24px;
}
.topbar h1 { margin: 0; font-size: 25px; }
.topbar p { margin: 5px 0 0; color: var(--ink-500); font-size: 13.5px; }
.userbar { display: flex; align-items: center; gap: 12px; }
.status { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 500; font-family: var(--font-mono); color: var(--ink-500); }
.status::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: var(--ink-300); }
.status-on::before { background: var(--good-700); }
.status-off::before { background: var(--bad-700); }

.content { display: grid; gap: 16px; }
.grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 16px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 20px; }
.card h2 { font-size: 17px; margin: 0 0 14px; }
.card h3 { font-size: 14.5px; margin: 0 0 12px; text-transform: uppercase; letter-spacing: .03em; color: var(--ink-700); font-family: var(--font-body); font-weight: 600; }
.col-3 { grid-column: span 3; } .col-4 { grid-column: span 4; } .col-6 { grid-column: span 6; }
.col-8 { grid-column: span 8; } .col-9 { grid-column: span 9; } .col-12 { grid-column: span 12; }

/* ---------- Stat cards (dashboard, ledger-style) ---------- */
.stat { position: relative; padding-top: 22px; }
.stat-label { font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-500); }
.stat-value { font-family: var(--font-mono); font-size: 27px; font-weight: 500; color: var(--ink-900); margin-top: 6px; }
.stat.accent { border-top: 2px solid var(--brass-600); }
.stat.accent .stat-value { color: var(--ink-700); }
.muted { color: var(--ink-500); }

/* ---------- Forms ---------- */
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field.full { grid-column: 1 / -1; }
label { font-weight: 500; font-size: 12.5px; color: var(--ink-700); }
.hint { font-size: 11.5px; color: var(--ink-500); margin-top: -2px; }
input, select, textarea {
  border: 1px solid var(--line-strong); border-radius: var(--radius); padding: 9px 10px;
  font: inherit; font-size: 13.5px; width: 100%; background: var(--surface); color: var(--ink-900);
}
input:focus, select:focus, textarea:focus { border-color: var(--ink-700); }
textarea { min-height: 100px; font-family: var(--font-mono); font-size: 12.5px; }
input[type="number"] { font-family: var(--font-mono); }

.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.btn {
  background: var(--ink-900); color: #fff; border: 1px solid var(--ink-900);
  border-radius: var(--radius); padding: 9px 14px; font-weight: 500; font-size: 13px; cursor: pointer;
}
.btn:hover { background: var(--ink-700); border-color: var(--ink-700); }
.btn.secondary { background: transparent; color: var(--ink-900); border-color: var(--line-strong); }
.btn.secondary:hover { border-color: var(--ink-700); color: var(--ink-700); }
.btn.brass { background: var(--brass-600); border-color: var(--brass-600); color: var(--ink-950); }
.btn.brass:hover { background: var(--brass-700); border-color: var(--brass-700); }
.btn.danger { background: var(--bad-700); border-color: var(--bad-700); }
.btn.success { background: var(--good-700); border-color: var(--good-700); }
.btn.ghost { background: transparent; border-color: transparent; color: var(--ink-700); padding: 6px 8px; }
.btn.ghost:hover { background: var(--ink-100); }
.btn.sm { padding: 6px 10px; font-size: 12px; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.hidden { display: none !important; }

/* ---------- Alerts ---------- */
.alert { padding: 12px 15px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--surface); font-size: 13px; }
.alert.ok { border-color: #B9D7C4; background: var(--good-100); color: var(--good-700); }
.alert.error { border-color: #E3B7B0; background: var(--bad-100); color: var(--bad-700); }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { border-bottom: 1px solid var(--line); padding: 9px 10px; text-align: left; vertical-align: middle; white-space: nowrap; }
th { color: var(--ink-500); font-size: 10.5px; text-transform: uppercase; letter-spacing: .05em; font-weight: 500; border-bottom: 1.5px solid var(--line-strong); }
td.num, th.num { text-align: right; font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
tr:hover td { background: var(--ink-100); }
tr.clickable { cursor: pointer; }
.cell-code { font-family: var(--font-mono); font-size: 12px; color: var(--ink-500); }

/* ---------- Status dots ---------- */
.dot { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 500; white-space: nowrap; }
.dot::before { content: ''; width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; background: var(--ink-300); }
.dot.good::before { background: var(--good-700); } .dot.good { color: var(--good-700); }
.dot.bad::before { background: var(--bad-700); } .dot.bad { color: var(--bad-700); }
.dot.warn::before { background: var(--warn-700); } .dot.warn { color: var(--warn-700); }
.dot.idle::before { background: var(--ink-300); } .dot.idle { color: var(--ink-500); }

pre { white-space: pre-wrap; word-break: break-word; background: var(--ink-950); color: #DCE3F0; font-family: var(--font-mono); font-size: 12px; padding: 14px; border-radius: var(--radius); overflow: auto; }
.badge { display: inline-flex; padding: 3px 8px; border-radius: 4px; font-size: 11px; font-weight: 500; background: var(--ink-100); color: var(--ink-700); font-family: var(--font-mono); }

/* ---------- Toolbar (search/filter row above lists) ---------- */
.toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 14px; }
.toolbar input, .toolbar select { width: auto; min-width: 160px; }
.toolbar .spacer { flex: 1; }
.empty { padding: 30px 10px; text-align: center; color: var(--ink-500); font-size: 13px; }
.pager { display: flex; gap: 8px; align-items: center; justify-content: flex-end; margin-top: 12px; font-size: 12.5px; color: var(--ink-500); }

@media (max-width: 960px) {
  .app-shell { flex-direction: column; }
  .sidebar { width: 100%; height: auto; position: relative; }
  .nav { flex-direction: row; flex-wrap: wrap; }
  .nav-group-label { display: none; }
  .main { padding: 18px; }
  .topbar { flex-direction: column; align-items: flex-start; }
  .col-3, .col-4, .col-6, .col-8, .col-9, .col-12 { grid-column: span 12; }
  .form-grid { grid-template-columns: 1fr; }
  th, td { white-space: normal; }
}