:root {
  --bg: #f4f3ef; --panel: #ffffff; --ink: #1c1d1f; --muted: #6b6d72; --line: #e2e0da; --soft: #efede7;
  --ok: #1f8a4c; --warn: #c4880f; --fault: #c53030; --unknown: #9a9ca1; --accent: #2b59c3;
  --ok-bg: #e6f4ec; --warn-bg: #fbf1de; --fault-bg: #fbe7e7; --unknown-bg: #eeeff1;
  --egg: #1c1d1f;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111214; --panel: #1a1c1f; --ink: #e8e9eb; --muted: #9a9da3; --line: #2b2e33; --soft: #22252a;
    --ok: #4cc47f; --warn: #e2b04b; --fault: #f06a6a; --unknown: #7c8087; --accent: #7aa2ff;
    --ok-bg: #16301f; --warn-bg: #33280f; --fault-bg: #3a1a1a; --unknown-bg: #24272c;
    --egg: #050506;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #111214; --panel: #1a1c1f; --ink: #e8e9eb; --muted: #9a9da3; --line: #2b2e33; --soft: #22252a;
  --ok: #4cc47f; --warn: #e2b04b; --fault: #f06a6a; --unknown: #7c8087; --accent: #7aa2ff;
  --ok-bg: #16301f; --warn-bg: #33280f; --fault-bg: #3a1a1a; --unknown-bg: #24272c;
  --egg: #050506;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--ink); font: 14px/1.45 var(--sans); -webkit-font-smoothing: antialiased; }
[hidden] { display: none !important; }
button { font: inherit; color: var(--ink); background: var(--soft); border: 1px solid var(--line); border-radius: 8px; padding: 7px 12px; cursor: pointer; }
button:hover { border-color: var(--muted); }
button:disabled { opacity: 0.5; cursor: default; }
button:focus-visible, input:focus-visible, summary:focus-visible, [tabindex]:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button.danger { color: var(--fault); border-color: color-mix(in srgb, var(--fault) 45%, var(--line)); }
button.ghost { background: transparent; }
button.small { padding: 4px 9px; font-size: 12px; font-family: var(--mono); }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.error { color: var(--fault); min-height: 1.4em; margin: 0; }

/* the colour language: one dot, one tag, one tile, everywhere */
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--unknown); flex: none; display: inline-block; }
[data-level=ok] > .dot, [data-level=ok] > * > .dot, .dot.ok { background: var(--ok); }
[data-level=warn] > .dot, [data-level=warn] > * > .dot, .dot.warn { background: var(--warn); }
[data-level=fault] > .dot, [data-level=fault] > * > .dot, .dot.fault { background: var(--fault); }
.tag { font: 600 11px var(--mono); padding: 1px 7px; border-radius: 999px; background: var(--unknown-bg); color: var(--muted); white-space: nowrap; }
.tag.ok { background: var(--ok-bg); color: var(--ok); }
.tag.warn { background: var(--warn-bg); color: var(--warn); }
.tag.fault { background: var(--fault-bg); color: var(--fault); }

/* sign in */
.signin { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.signin-card { width: min(360px, 100%); background: var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 28px; display: grid; gap: 14px; }
.signin-card h1 { margin: 0; font-size: 22px; letter-spacing: 0.02em; }
.signin-card p { margin: 0; }
.signin-mark { width: 40px; height: 40px; }
.signin-card label { display: grid; gap: 6px; font-weight: 500; }
.signin-card input { font: inherit; padding: 9px 11px; border-radius: 8px; border: 1px solid var(--line); background: var(--bg); color: var(--ink); }
.signin-card button[type=submit] { background: var(--ink); color: var(--bg); border-color: var(--ink); padding: 10px; font-weight: 600; }

/* top */
.top { position: sticky; top: 0; z-index: 5; display: flex; align-items: center; gap: 16px; padding: 10px 16px; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; letter-spacing: 0.02em; }
.brand img { width: 24px; height: 24px; }
.agent { display: flex; align-items: center; gap: 8px; padding: 5px 12px; border-radius: 999px; background: var(--unknown-bg); font-size: 13px; }
.agent[data-level=ok] { background: var(--ok-bg); }
.agent[data-level=fault] { background: var(--fault-bg); }
.who { margin-left: auto; display: flex; align-items: center; gap: 10px; color: var(--muted); }
.who .docs-link { color: var(--accent); font-weight: 600; text-decoration: none; }
.who .docs-link:hover { text-decoration: underline; }

/* the shell: the rail, and one panel */
.shell { max-width: 1320px; margin: 0 auto; padding: 16px; display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 16px; align-items: start; }
.rail { position: sticky; top: 64px; display: grid; gap: 16px; }
.tabs { display: grid; gap: 8px; }
.tab { text-align: left; display: grid; gap: 4px; padding: 11px 12px; border-radius: 12px; background: var(--panel); border: 1px solid var(--line); border-left: 4px solid var(--unknown); }
.tab[data-level=ok] { border-left-color: var(--ok); }
.tab[data-level=warn] { border-left-color: var(--warn); }
.tab[data-level=fault] { border-left-color: var(--fault); }
.tab[aria-selected=true] { border-color: var(--ink); border-left-width: 4px; box-shadow: 0 1px 0 var(--line), 0 6px 18px rgb(0 0 0 / 0.06); }
.tab-head { display: flex; align-items: center; gap: 8px; }
.tab-head b { font: 700 13px var(--mono); letter-spacing: 0.04em; }
.tab-title { color: var(--muted); font-size: 12.5px; }
.tab-note { font-size: 12.5px; line-height: 1.3; }
.tab[data-level=fault] .tab-note { color: var(--fault); }
.tab-figs { display: flex; flex-wrap: wrap; gap: 4px 12px; }
.fig { display: grid; line-height: 1.2; }
.fig i { font-style: normal; font-size: 10.5px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }
.fig b { font: 600 13px var(--mono); }
.fig.ok b { color: var(--ok); } .fig.warn b { color: var(--warn); } .fig.fault b { color: var(--fault); }

.recent h2 { margin: 0 0 6px; font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
.log { list-style: none; margin: 0; padding: 0; display: grid; gap: 1px; font-size: 12.5px; }
.log li { display: grid; grid-template-columns: 10px 1fr; gap: 0 8px; align-items: baseline; padding: 5px 0; border-bottom: 1px solid var(--line); }
.log .dot { width: 7px; height: 7px; }
.log time { grid-column: 2; font: 11px var(--mono); color: var(--muted); }

/* a panel */
.panel { display: grid; gap: 14px; }
.panel-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding: 2px 2px 0; }
.panel-head h1 { margin: 0; font-size: 22px; letter-spacing: 0.01em; }
.panel-head .code { font: 600 13px var(--mono); color: var(--muted); margin-left: 4px; }
.ifs { margin: 2px 0 0; color: var(--muted); font-size: 12.5px; font-family: var(--mono); }
.state { display: flex; align-items: center; gap: 8px; padding: 6px 12px; border-radius: 999px; background: var(--unknown-bg); font-weight: 500; }
.panel[data-level=ok] .state { background: var(--ok-bg); }
.panel[data-level=warn] .state { background: var(--warn-bg); }
.panel[data-level=fault] .state { background: var(--fault-bg); }
.state .age { color: var(--muted); font-weight: 400; font-size: 12px; }
.panel-body { display: grid; gap: 14px; }

.card { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px; display: grid; gap: 10px; align-content: start; min-width: 0; }
.card h3 { margin: 0; font-size: 12px; text-transform: uppercase; letter-spacing: 0.07em; color: var(--muted); font-weight: 600; }
.cols { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.cols.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.stack { display: grid; gap: 14px; align-content: start; }
.row { display: flex; align-items: center; gap: 10px; }
.row.wrap { flex-wrap: wrap; }
.controls { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }

.kv { margin: 0; display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 5px 14px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; font-family: var(--mono); font-size: 12.5px; overflow-wrap: anywhere; }
.kv dd.fault { color: var(--fault); font-weight: 600; }
.kv dd.warn { color: var(--warn); font-weight: 600; }
.chips { display: flex; flex-wrap: wrap; gap: 4px; }
.chip { font: 11px var(--mono); padding: 1px 7px; border-radius: 999px; }
.chip.ok { background: var(--ok-bg); color: var(--ok); }
.chip.fault { background: var(--fault-bg); color: var(--fault); }
.swatch { display: inline-block; width: 12px; height: 12px; border-radius: 3px; vertical-align: -1px; border: 1px solid var(--line); background: #000; margin-right: 6px; }
details.more summary { cursor: pointer; color: var(--muted); padding: 7px 4px; }
details.more[open] { flex-basis: 100%; }

/* charts */
.gauges { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.gauge { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 4px; }
.chart { width: 100%; height: 170px; }
.chart.wide { height: 200px; }
.chart-tip { font: 12px var(--mono) !important; }

/* OBC */
.firmware { margin: 0; display: flex; align-items: center; gap: 10px; }
.firmware .hash { font: 700 26px var(--mono); letter-spacing: 0.02em; }

/* SPK */
.slider { display: flex; align-items: center; gap: 8px; color: var(--muted); }
.slider input[type=range] { width: 140px; accent-color: var(--ink); }
.slider output { font: 12px var(--mono); min-width: 4ch; color: var(--ink); }
.slider .sl { min-width: 0; }
.meter-wrap { display: grid; gap: 6px; }
.meter { position: relative; height: 12px; border-radius: 6px; background: var(--soft); overflow: hidden; }
.meter::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, var(--ok) 0 80%, var(--warn) 80% 95%, var(--fault) 95%); opacity: 0.18; }
.meter-rms { position: absolute; left: 0; top: 0; bottom: 0; width: 0; background: linear-gradient(90deg, var(--ok) 0, var(--ok) 80%, var(--warn)); transition: width 0.3s; }
.meter-peak { position: absolute; top: 0; bottom: 0; width: 2px; left: 0; background: var(--ink); transition: left 0.3s; }
.meter[data-level=warn] .meter-peak { background: var(--warn); }
.meter[data-level=fault] .meter-peak { background: var(--fault); }
.mixer { display: flex; gap: 12px; justify-content: space-around; align-items: flex-start; }
.strip { display: grid; justify-items: center; gap: 8px; }
.strip.master { padding-left: 16px; border-left: 1px dashed var(--line); }
.fader { flex-direction: column-reverse; gap: 6px; }
.fader .sl { font-weight: 600; color: var(--ink); }
.fader input[type=range].vertical { writing-mode: vertical-lr; direction: rtl; width: 28px; height: 150px; }
.fader output.over { color: var(--warn); font-weight: 700; }
.led { width: 10px; height: 10px; border-radius: 50%; background: var(--unknown-bg); border: 1px solid var(--line); transition: background 0.2s; }
.led[data-level=ok] { background: var(--ok); border-color: var(--ok); }
.led[data-level=warn] { background: var(--warn); border-color: var(--warn); }
.led[data-level=fault] { background: var(--fault); border-color: var(--fault); box-shadow: 0 0 6px var(--fault); }
button.small.on { color: var(--accent); border-color: var(--accent); }
.seg { display: inline-flex; gap: 4px; }
.seg button[aria-pressed=true] { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.eq-top { gap: 10px 14px; }
.eq-top > .muted { flex: 1; }
.eq-graph { width: 100%; height: auto; display: block; background: var(--soft); border-radius: 10px; }
.eq-graph .grid { stroke: var(--line); stroke-width: 1; }
.eq-graph .zero { stroke: var(--muted); stroke-width: 1; }
.eq-graph .glabel { font: 11px var(--mono); fill: var(--muted); }
.eq-graph .curve { fill: none; stroke: var(--accent); stroke-width: 2.5; stroke-linejoin: round; }
.eq-graph .fill { fill: var(--accent); opacity: 0.12; }
.eq-graph .dot { fill: var(--panel); stroke: var(--accent); stroke-width: 2; }
.eq-bands { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.eq-band { display: grid; gap: 8px; align-content: start; min-width: 0; }
.eq-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; min-height: 28px; }
.knob { display: grid; grid-template-columns: minmax(0, 1fr) 9ch; align-items: center; gap: 8px; }
.knob input[type=range] { width: 100%; min-width: 0; accent-color: var(--ink); }
.knob output { font: 12px var(--mono); color: var(--ink); text-align: right; white-space: nowrap; }
.playing { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.playing li { display: flex; align-items: center; gap: 8px; font-family: var(--mono); font-size: 12.5px; }

/* TAB */
.tiles { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.tile { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px; display: grid; gap: 6px; align-content: start; border-top: 4px solid var(--unknown); }
.tile[data-level=ok] { border-top-color: var(--ok); }
.tile[data-level=warn] { border-top-color: var(--warn); }
.tile[data-level=fault] { border-top-color: var(--fault); }
.tile-label { font-size: 12px; text-transform: uppercase; letter-spacing: 0.07em; color: var(--muted); font-weight: 600; }
.tile-big { font: 700 24px var(--mono); overflow-wrap: anywhere; line-height: 1.15; }
.tile[data-level=warn] .tile-big { color: var(--warn); }
.tile[data-level=fault] .tile-big { color: var(--fault); }
.tile-sub { color: var(--muted); font-size: 12.5px; }
.bar { height: 8px; border-radius: 4px; background: var(--soft); overflow: hidden; }
.bar span { display: block; height: 100%; background: currentColor; }
.tile[data-level=ok] .bar { color: var(--ok); } .tile[data-level=warn] .bar { color: var(--warn); } .tile[data-level=fault] .bar { color: var(--fault); }
.scale { display: grid; grid-template-columns: repeat(4, 1fr); gap: 3px; }
.scale .step { font: 10px var(--mono); text-align: center; padding: 2px 0; border-radius: 4px; background: var(--soft); color: var(--muted); }
.scale .step.on.ok { background: var(--ok); color: #fff; }
.scale .step.on.warn { background: var(--warn); color: #fff; }
.scale .step.on.fault { background: var(--fault); color: #fff; }

/* LIT */
.cols.lit { grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); align-items: start; }
.diagram { width: 100%; height: auto; display: block; color: var(--muted); }
.diagram .truss { fill: var(--soft); stroke: var(--line); }
.diagram .cable { fill: none; stroke: var(--line); stroke-width: 2; stroke-dasharray: 5 4; }
.diagram .fixture { fill: var(--ink); }
.diagram .yoke { fill: none; stroke: var(--ink); stroke-width: 3; stroke-linecap: round; }
.diagram .egg { fill: var(--egg); stroke: var(--line); }
.diagram .plinth { fill: var(--soft); stroke: var(--line); }
.diagram .floor { stroke: var(--line); stroke-width: 2; }
.diagram .dlabel { font: 700 13px var(--mono); fill: var(--ink); }
.diagram .dsub { font: 10px var(--mono); fill: var(--muted); }
.diagram .beam { mix-blend-mode: normal; }
.channels { display: grid; gap: 6px; }
.channel { display: grid; grid-template-columns: 22px 16px 1fr 34px; gap: 8px; align-items: center; font: 12px var(--mono); }
.channel .ch { color: var(--muted); text-align: right; }
.channel .role { font-weight: 700; }
.channel b { text-align: right; }
.track { height: 10px; border-radius: 5px; background: var(--soft); overflow: hidden; }
.fill { display: block; height: 100%; background: var(--ink); transition: width 0.4s; }
.fill.r { background: #e5484d; } .fill.g { background: #30a46c; } .fill.b { background: #3e63dd; } .fill.w { background: #c9c9c9; } .fill.dimmer { background: var(--muted); }
.patterns { display: grid; grid-template-columns: repeat(auto-fill, minmax(128px, 1fr)); gap: 6px; }
.patterns button { text-align: left; }
.pattern-note { margin: 0; }
.pattern-note[data-on="1"] { color: var(--ink); font-weight: 600; }

#toasts { position: fixed; right: 16px; bottom: 16px; display: grid; gap: 8px; z-index: 10; max-width: min(420px, calc(100vw - 32px)); }
.toast { background: var(--ink); color: var(--bg); padding: 10px 14px; border-radius: 10px; font-size: 13px; box-shadow: 0 6px 20px rgb(0 0 0 / 0.18); }
.toast.good { background: var(--ok); color: #fff; }
.toast.bad { background: var(--fault); color: #fff; }

@media (max-width: 1100px) {
  .gauges, .tiles { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .eq-bands { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cols.three { grid-template-columns: 1fr; }
}
@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; padding: 12px 16px; }
  .rail { position: static; }
  .tabs { grid-auto-flow: column; grid-auto-columns: minmax(150px, 1fr); overflow-x: auto; padding-bottom: 4px; scroll-snap-type: x mandatory; }
  .tab { scroll-snap-align: start; }
  .tab-figs .fig:nth-child(n+3) { display: none; }
  .recent { display: none; }
  .cols, .cols.lit { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .top { flex-wrap: wrap; gap: 8px; }
  .who { margin-left: 0; }
  .gauges, .tiles { grid-template-columns: 1fr 1fr; gap: 10px; }
  .chart { height: 140px; }
  .tile-big { font-size: 20px; }
  .slider input[type=range] { width: 110px; }
  .eq-bands { grid-template-columns: 1fr; }
}