:root {
  --bg: #0b1120;
  --panel: #111a2e;
  --panel-2: #16223a;
  --line: #22314f;
  --text: #e2e8f0;
  --muted: #8a9bb8;
  --accent: #38bdf8;
  --accent-ink: #04202e;
  --ok: #22c55e;
  --warn: #f59e0b;
  --danger: #ef4444;
  --lamp-off: #1e293b;
  --radius: 12px;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); }
body { font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
h2 { font-size: 15px; margin: 0; letter-spacing: .01em; }
h3 { font-size: 13px; margin: 16px 0 8px; color: var(--muted); font-weight: 600; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
[hidden] { display: none !important; }

/* ---- top bar ---- */
.topbar {
  display: flex; flex-wrap: wrap; gap: 10px; align-items: center; justify-content: space-between;
  padding: 12px 20px; border-bottom: 1px solid var(--line); background: #0d1526; position: sticky; top: 0; z-index: 5;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 16px; }
.brand svg { width: 26px; height: 26px; color: var(--accent); }
.status-strip { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.pill { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: 999px; background: var(--panel-2); border: 1px solid var(--line); font-size: 12px; }
.pill i { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); }
.pill.on i { background: var(--ok); box-shadow: 0 0 8px var(--ok); }
.pill.off i { background: var(--danger); }
.pill b { font-weight: 600; }
.tag { font-size: 11px; font-weight: 700; letter-spacing: .08em; padding: 3px 8px; border-radius: 6px; background: #3b2f0b; color: #fcd34d; }

/* ---- layout ---- */
.layout {
  display: grid; gap: 16px; padding: 16px 20px 40px;
  grid-template-columns: minmax(0, 2.1fr) minmax(300px, 1fr);
  grid-template-areas:
    "live alarm"
    "live ptz"
    "live relays"
    "events cams"
    "sim system"
    "gpio gpio";
}
.live { grid-area: live; } .alarm { grid-area: alarm; } .ptz { grid-area: ptz; } .relays { grid-area: relays; }
.events { grid-area: events; } .cams { grid-area: cams; } .sim { grid-area: sim; } .system { grid-area: system; }
.gpio { grid-area: gpio; }
@media (max-width: 1100px) {
  .layout { grid-template-columns: minmax(0, 1fr); grid-template-areas: "live" "alarm" "ptz" "relays" "cams" "events" "sim" "gpio" "system"; padding: 12px 16px 32px; }
}
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; min-width: 0; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }
.head-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

/* ---- buttons / inputs ---- */
.btn {
  appearance: none; border: 1px solid var(--line); background: var(--panel-2); color: var(--text);
  padding: 7px 12px; border-radius: 8px; font: inherit; cursor: pointer; transition: background .15s, border-color .15s;
}
.btn:hover { border-color: #35507d; background: #1b2a47; }
.btn:focus-visible, input:focus-visible, select:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.small { padding: 4px 9px; font-size: 12px; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
.btn.warn { border-color: #5c4310; }
.btn.danger { border-color: #6b1f1f; color: #fecaca; }
.btn.danger:hover { background: #3a1414; }
.btn[aria-pressed="true"] { background: #0c3a50; border-color: var(--accent); }
input[type="text"], input[type="number"], select {
  background: var(--bg); color: var(--text); border: 1px solid var(--line); border-radius: 7px; padding: 6px 8px; font: inherit;
}
input[type="number"] { width: 72px; }
input[type="range"] { accent-color: var(--accent); }

/* ---- live view ---- */
.stage { position: relative; aspect-ratio: 4 / 3; background: #050a14; border-radius: 10px; overflow: hidden; border: 1px solid var(--line); }
.stage video { width: 100%; height: 100%; object-fit: contain; display: block; background: #050a14; }
.stage-empty { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; padding: 20px; }
.stage-empty .big { font-size: 20px; font-weight: 600; margin: 0 0 6px; }
.stage-label { position: absolute; left: 12px; bottom: 10px; background: rgba(0,0,0,.6); padding: 3px 9px; border-radius: 6px; font-size: 12px; }
.motion-flag, .live-badge {
  font-size: 11px; font-weight: 800; letter-spacing: .08em; padding: 3px 8px; border-radius: 6px; background: var(--danger); color: #fff;
}
.motion-flag { position: absolute; right: 12px; top: 10px; animation: pulse 1s infinite; }
@keyframes pulse { 50% { opacity: .45; } }
.tiles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin-top: 10px; }
.tile {
  position: relative; aspect-ratio: 4 / 3; background: #050a14; border-radius: 8px; overflow: hidden; cursor: pointer;
  border: 2px solid transparent; padding: 0; color: inherit; font: inherit;
}
.tile.focused { border-color: var(--accent); }
.tile video { width: 100%; height: 100%; object-fit: cover; display: block; }
.tile .name { position: absolute; left: 6px; bottom: 5px; font-size: 11px; background: rgba(0,0,0,.65); padding: 2px 6px; border-radius: 5px; }
.tile .dot { position: absolute; right: 7px; top: 7px; width: 9px; height: 9px; border-radius: 50%; background: var(--muted); }
.tile .dot.online { background: var(--ok); }
.tile .dot.motion { background: var(--danger); box-shadow: 0 0 10px var(--danger); }
.tile .off { position: absolute; inset: 0; display: grid; place-content: center; color: var(--muted); font-size: 12px; }
.live-controls { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 12px; }
.live-controls .spacer { flex: 1; }
.btn.talk.active { background: var(--danger); border-color: var(--danger); color: #fff; }
.talk-meter { width: 90px; height: 8px; background: var(--bg); border: 1px solid var(--line); border-radius: 5px; overflow: hidden; }
.talk-meter span { display: block; height: 100%; width: 0; background: var(--ok); transition: width .2s; }

/* ---- alarm ---- */
.alarm-state { font-weight: 800; font-size: 12px; letter-spacing: .08em; padding: 3px 9px; border-radius: 6px; background: var(--panel-2); color: var(--muted); }
.alarm-state.armed { background: #3b2f0b; color: #fcd34d; }
.alarm-state.triggered { background: var(--danger); color: #fff; animation: pulse .8s infinite; }
.arm-row { display: flex; gap: 8px; flex-wrap: wrap; }
.btn.arm.armed { background: #3b2f0b; border-color: var(--warn); color: #fde68a; }

/* ---- PTZ ---- */
.ptz-body { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.dpad { display: grid; grid-template-columns: repeat(3, 40px); grid-template-rows: repeat(3, 40px); gap: 4px; }
.dpad .btn { padding: 0; font-size: 15px; }
.dpad [data-step="0,-10"] { grid-column: 2; grid-row: 1; }
.dpad [data-step="-10,0"] { grid-column: 1; grid-row: 2; }
.dpad .home { grid-column: 2; grid-row: 2; }
.dpad [data-step="10,0"] { grid-column: 3; grid-row: 2; }
.dpad [data-step="0,10"] { grid-column: 2; grid-row: 3; }
.ptz-gauge { width: 150px; height: 94px; flex: none; }
.ptz-gauge .arc { fill: none; stroke: var(--line); stroke-width: 6; stroke-linecap: round; }
.ptz-gauge .needle { stroke: var(--accent); stroke-width: 4; stroke-linecap: round; transition: all .15s; }
.ptz-gauge .hub { fill: var(--accent); }
.ptz-gauge .tilt-track { fill: var(--line); }
.ptz-gauge .tilt-dot { fill: var(--warn); transition: y .15s; }
.slider { display: grid; grid-template-columns: 34px 1fr 34px; gap: 8px; align-items: center; margin-top: 8px; font-size: 12px; color: var(--muted); }
.slider output { text-align: right; color: var(--text); font-variant-numeric: tabular-nums; }
.presets { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.preset { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.preset button { border: 0; border-radius: 0; background: var(--panel-2); color: var(--text); padding: 5px 9px; cursor: pointer; font: inherit; font-size: 12px; }
.preset button + button { border-left: 1px solid var(--line); color: var(--muted); }
.preset button:hover { background: #1b2a47; }
.preset-save { display: flex; gap: 6px; margin-top: 10px; }
.preset-save input { flex: 1; min-width: 0; }

/* ---- relays ---- */
.relay { display: grid; grid-template-columns: 26px 1fr auto; gap: 10px; align-items: center; padding: 9px 0; border-top: 1px solid var(--line); }
.relay:first-child { border-top: 0; }
.lamp { width: 22px; height: 22px; border-radius: 50%; background: var(--lamp-off); border: 2px solid #2c3b57; transition: background .05s, box-shadow .05s; }
.lamp.lit.strobe { background: #f8fafc; box-shadow: 0 0 16px #f8fafc; }
.lamp.lit.siren { background: var(--danger); box-shadow: 0 0 16px var(--danger); }
.lamp.lit.flasher { background: var(--warn); box-shadow: 0 0 16px var(--warn); }
.lamp.lit.aux { background: var(--ok); box-shadow: 0 0 16px var(--ok); }
.lamp.blink-css { animation: lampblink 1s steps(2) infinite; }
@keyframes lampblink { 50% { background: var(--lamp-off); box-shadow: none; } }
.relay .title { font-weight: 600; text-transform: capitalize; }
.relay .meta { font-size: 11px; color: var(--muted); }
.relay .controls { grid-column: 2 / -1; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.relay .controls label { font-size: 11px; color: var(--muted); display: inline-flex; gap: 4px; align-items: center; }
.relay .controls input[type="number"] { width: 64px; padding: 4px 6px; }
.switch { position: relative; width: 42px; height: 24px; flex: none; }
.switch input { opacity: 0; width: 0; height: 0; position: absolute; }
.switch span { position: absolute; inset: 0; background: var(--lamp-off); border: 1px solid var(--line); border-radius: 999px; cursor: pointer; transition: .15s; }
.switch span::after { content: ""; position: absolute; width: 18px; height: 18px; left: 2px; top: 2px; background: var(--muted); border-radius: 50%; transition: .15s; }
.switch input:checked + span { background: #0c3a50; border-color: var(--accent); }
.switch input:checked + span::after { transform: translateX(18px); background: var(--accent); }
.switch input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---- events ---- */
.event-list { list-style: none; margin: 0; padding: 0; max-height: 420px; overflow: auto; }
.event-list li { display: grid; grid-template-columns: 64px 1fr; gap: 10px; padding: 8px 0; border-top: 1px solid var(--line); align-items: center; }
.event-list li:first-child { border-top: 0; }
.event-list img { width: 64px; height: 48px; object-fit: cover; border-radius: 5px; background: #050a14; }
.event-list .icon { width: 64px; height: 48px; display: grid; place-content: center; border-radius: 5px; background: var(--panel-2); font-size: 18px; }
.event-list .what { font-weight: 600; }
.event-list .when { font-size: 11px; color: var(--muted); }
.event-list li.detection .what, .event-list li.alarm .what, .event-list li.tamper .what { color: #fca5a5; }
.event-list a { color: var(--accent); }
.empty { color: var(--muted); padding: 10px 0; }

/* ---- cameras ---- */
.cam { display: grid; grid-template-columns: 1fr auto; gap: 6px 12px; padding: 10px 0; border-top: 1px solid var(--line); }
.cam:first-child { border-top: 0; }
.cam .title { font-weight: 600; display: flex; gap: 8px; align-items: center; }
.cam .title .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--danger); }
.cam .title .dot.online { background: var(--ok); }
.cam .meta { font-size: 11px; color: var(--muted); }
.cam .row { grid-column: 1 / -1; display: flex; gap: 12px; align-items: center; flex-wrap: wrap; font-size: 12px; color: var(--muted); }
.meter { flex: 1; min-width: 120px; height: 8px; background: var(--bg); border: 1px solid var(--line); border-radius: 5px; position: relative; overflow: hidden; }
.meter span { position: absolute; left: 0; top: 0; bottom: 0; background: var(--accent); transition: width .3s; }
.meter span.hot { background: var(--danger); }

/* ---- sim ---- */
.sim-grid { display: grid; grid-template-columns: 110px repeat(3, minmax(0, 1fr)); gap: 6px; align-items: center; font-size: 12px; }
.sim-grid .h { color: var(--muted); font-weight: 600; }
.sim-grid .btn { padding: 5px 6px; font-size: 12px; }
.sim-row { display: flex; gap: 8px; margin-top: 12px; flex-wrap: wrap; }

/* ---- system ---- */
.stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 8px; }
.stat { background: var(--panel-2); border-radius: 8px; padding: 8px 10px; }
.stat .k { font-size: 11px; color: var(--muted); }
.stat .v { font-size: 17px; font-weight: 600; font-variant-numeric: tabular-nums; }
.ota { display: grid; grid-template-columns: auto 1fr; gap: 4px 12px; margin: 0; font-size: 13px; }
.ota dt { color: var(--muted); }
.ota dd { margin: 0; font-variant-numeric: tabular-nums; }
.ota-actions { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }

/* ---- toasts ---- */
.toasts { position: fixed; right: 16px; bottom: 16px; display: grid; gap: 8px; z-index: 20; max-width: min(360px, calc(100vw - 32px)); }
.toast { background: #1e293b; border: 1px solid var(--line); border-left: 4px solid var(--accent); padding: 10px 12px; border-radius: 8px; box-shadow: 0 10px 30px rgba(0,0,0,.4); font-size: 13px; }
.toast.error { border-left-color: var(--danger); }
.toast.alert { border-left-color: var(--danger); background: #3a1414; }

/* ---- route indicator ---- */
.route { font-size: 11px; font-weight: 600; padding: 3px 8px; border-radius: 6px; background: #0c3a50; color: #bae6fd; }
.route.direct { background: #14361f; color: #bbf7d0; }

/* ---- GPIO feedback ---- */
.pin-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.pin-table th { text-align: left; color: var(--muted); font-weight: 600; padding: 4px 6px; border-bottom: 1px solid var(--line); }
.pin-table td { padding: 5px 6px; border-bottom: 1px solid var(--line); font-variant-numeric: tabular-nums; }
.pin-table tr.fault td { background: #3a1414; }
.lvl { display: inline-block; min-width: 44px; text-align: center; font-weight: 700; font-size: 11px; padding: 2px 6px; border-radius: 5px; font-family: ui-monospace, monospace; }
.lvl.HIGH { background: #3b2f0b; color: #fde68a; }
.lvl.LOW { background: #0f2540; color: #93c5fd; }
.lvl.PWM { background: #14361f; color: #bbf7d0; }
.lvl.IDLE, .lvl.\? { background: var(--panel-2); color: var(--muted); }
.lvl.flash { outline: 2px solid var(--accent); }
.log-head { display: flex; align-items: center; gap: 8px; }
.log-head h3 { margin: 0; }
.log-head .spacer { flex: 1; }
.gpio-log { list-style: none; margin: 8px 0 0; padding: 8px; height: 250px; overflow: auto; background: #070d1a; border: 1px solid var(--line); border-radius: 8px;
  font: 12px/1.6 ui-monospace, SFMono-Regular, Menlo, monospace; }
.gpio-body { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr); gap: 20px; align-items: start; }
@media (max-width: 1100px) { .gpio-body { grid-template-columns: minmax(0, 1fr); } }
.gpio-log li { display: grid; grid-template-columns: 96px 62px 110px 54px 1fr; gap: 6px; white-space: nowrap; }
.gpio-log li.fault { color: #fca5a5; }
.gpio-log .t { color: var(--muted); }
.gpio-log .m { overflow: hidden; text-overflow: ellipsis; color: var(--muted); }
@media (max-width: 600px) { .gpio-log li { grid-template-columns: 80px 50px 1fr 46px; } .gpio-log .m { display: none; } }