:root {
  --bg: #0E1116; --surface: #171B22; --surface-hi: #222833; --line: #2A313D;
  --brand: #1FA37A; --brand-hi: #2CC795; --accent: #F2B134; --text: #F4F6F8; --dim: #9AA4B2; --danger: #E5484D;
  --radius: 12px;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--text);
  font: 15px/1.45 Inter, "Segoe UI", system-ui, -apple-system, sans-serif; }
h1, h2, h3 { font-family: Montserrat, "Segoe UI Semibold", system-ui, sans-serif; margin: 0 0 6px; }
h1 { font-size: 26px; } h2 { font-size: 20px; } h3 { font-size: 16px; }
a { color: var(--brand-hi); }
.hidden { display: none !important; }
.eyebrow { color: var(--accent); font: 600 12px/1 Montserrat, sans-serif; letter-spacing: .12em; text-transform: uppercase; margin: 0 0 6px; }
.dim { color: var(--dim); } .error { color: var(--danger); min-height: 1.2em; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.btn { border: 1px solid var(--line); background: var(--surface-hi); color: var(--text); border-radius: 8px;
  padding: 9px 14px; font: inherit; cursor: pointer; }
.btn:hover { border-color: var(--brand); }
.btn.primary { background: var(--brand); border-color: var(--brand); font-weight: 600; }
.btn.primary:hover { background: var(--brand-hi); }
.btn.danger { color: var(--danger); }
.btn.ghost { background: transparent; }
.btn.small { padding: 5px 10px; font-size: 13px; }
input, select, textarea { width: 100%; background: var(--bg); color: var(--text); border: 1px solid var(--line);
  border-radius: 8px; padding: 9px 11px; font: inherit; margin-top: 4px; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--brand); border-color: transparent; }
label { display: block; margin: 12px 0; color: var(--dim); font-size: 13px; }
label.check { display: flex; gap: 10px; align-items: flex-start; color: var(--text); font-size: 14px; }
label.check input { width: auto; margin-top: 3px; accent-color: var(--brand); }
.auth { min-height: 100%; display: grid; place-items: center; padding: 16px; }
.auth-card { width: min(420px, 100%); }
.auth-logo { height: 90px; display: block; margin-bottom: 16px; }

.shell { display: grid; grid-template-columns: 250px 1fr; min-height: 100%; }
.side { background: var(--surface); border-right: 1px solid var(--line); padding: 18px 14px; display: flex; flex-direction: column; gap: 14px;
  position: sticky; top: 0; height: 100vh; overflow-y: auto; }
.brand { display: flex; gap: 12px; align-items: center; font: 700 18px Montserrat, sans-serif; }
.brand img { height: 44px; } .brand small { display: block; font: 12px Inter, sans-serif; color: var(--dim); }
nav { display: flex; flex-direction: column; gap: 2px; flex: 1; }
nav .sec { color: var(--dim); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; margin: 14px 10px 4px; }
nav a { color: var(--text); text-decoration: none; padding: 8px 10px; border-radius: 8px; display: flex; justify-content: space-between; }
nav a:hover { background: var(--surface-hi); }
nav a.on { background: var(--brand); font-weight: 600; }
nav a .pill { background: var(--danger); border-radius: 10px; padding: 0 7px; font-size: 12px; }
main { padding: 28px 32px; max-width: 1400px; width: 100%; }
.head { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; margin-bottom: 20px; flex-wrap: wrap; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.stat b { font: 700 30px Montserrat, sans-serif; display: block; }
.stat.warn b { color: var(--accent); }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { color: var(--dim); font-size: 12px; text-transform: uppercase; letter-spacing: .06em; font-weight: 600; }
tr.click { cursor: pointer; } tr.click:hover td { background: var(--surface-hi); }
.mono { font-family: Consolas, ui-monospace, monospace; font-size: 13px; }
.chip { display: inline-block; border-radius: 6px; padding: 2px 8px; font-size: 12px; background: var(--surface-hi); }
.chip.ok { background: rgba(31,163,122,.2); color: var(--brand-hi); } .chip.warn { background: rgba(242,177,52,.18); color: var(--accent); }
.chip.bad { background: rgba(229,72,77,.18); color: var(--danger); }
.table-wrap { overflow-x: auto; }
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin: 16px 0; }
.tabs button { background: transparent; border: 1px solid var(--line); color: var(--text); border-radius: 8px; padding: 7px 12px; cursor: pointer; font: inherit; }
.tabs button.on { background: var(--brand); border-color: var(--brand); }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 180px; }
.list { display: flex; flex-direction: column; gap: 6px; }
.list .item { display: flex; justify-content: space-between; align-items: center; gap: 10px; background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 8px 12px; }
.modal { position: fixed; inset: 0; background: rgba(14,17,22,.8); display: grid; place-items: center; padding: 16px; z-index: 10; }
.modal-card { width: min(640px, 100%); max-height: 90vh; overflow-y: auto; }
.modal-card.wide { width: min(980px, 100%); }
.actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }
.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--surface-hi); border: 1px solid var(--brand);
  padding: 10px 18px; border-radius: 10px; z-index: 20; }
.setting { display: grid; grid-template-columns: 1fr 260px; gap: 12px; align-items: center; padding: 8px 0; border-bottom: 1px solid var(--line); }
.setting .k { font-size: 12px; color: var(--dim); }
fieldset { border: 1px solid var(--line); border-radius: var(--radius); margin: 14px 0; padding: 6px 16px 12px; }
legend { color: var(--accent); font: 600 12px Montserrat, sans-serif; letter-spacing: .1em; text-transform: uppercase; padding: 0 6px; }
@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; }
  .side { position: static; height: auto; flex-direction: row; flex-wrap: wrap; }
  nav { flex-direction: row; flex-wrap: wrap; }
  nav .sec { display: none; }
  main { padding: 18px 16px; }
  .setting { grid-template-columns: 1fr; }
}

/* Device Information tiles */
.info-grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); margin-top: 8px; }
.info-tile { display: flex; gap: 14px; align-items: center; padding: 14px 16px; border: 1px solid var(--line, #2a313c); border-radius: 14px; background: var(--surface-hi); min-width: 0; }
.info-ic { flex: 0 0 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; font-size: 20px; background: rgba(31,163,122,.15); }
.info-label { font-size: 11px; letter-spacing: .12em; text-transform: uppercase; opacity: .7; font-weight: 700; }
.info-value { font-weight: 700; margin-top: 2px; overflow-wrap: anywhere; }
.meter { height: 6px; border-radius: 4px; background: var(--line); margin-top: 6px; overflow: hidden; max-width: 260px; }
.meter > span { display: block; height: 100%; background: var(--brand-hi); }
.meter.warn > span { background: var(--accent); }
.meter.low > span { background: var(--danger); }