:root {
  --bg: #f4f5f7; --panel: #ffffff; --text: #1d2330; --muted: #677085; --line: #e2e5ea;
  --accent: #1f6feb; --ok: #1a7f37; --warn: #b35900; --err: #c62828; --err-bg: #fdecec;
  --warn-bg: #fff4e5; --ok-bg: #e9f6ec; --chip: #eef1f5; --user: #e8f0fe;
  --radius: 12px; --shadow: 0 1px 2px rgba(16, 24, 40, .06);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11141a; --panel: #1a1f27; --text: #e6e9ef; --muted: #98a1b3; --line: #2a313c;
    --accent: #5b9bff; --ok: #4cc26a; --warn: #f0a24a; --err: #ff6b6b; --err-bg: #3a1f22;
    --warn-bg: #3a2c1a; --ok-bg: #1b3324; --chip: #232a35; --user: #1f2b44; --shadow: none;
  }
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif; background: var(--bg); color: var(--text); }
button { font: inherit; cursor: pointer; border-radius: 8px; border: 1px solid var(--line); background: var(--panel); color: var(--text); padding: 7px 14px; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button:disabled { opacity: .5; cursor: default; }
input, textarea { font: inherit; color: var(--text); background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 9px 11px; width: 100%; }

header { display: flex; align-items: center; gap: 12px; padding: 12px 20px; background: var(--panel); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
header h1 { font-size: 17px; margin: 0; font-weight: 600; }
header .spacer { flex: 1; }
.chip { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; padding: 3px 10px; border-radius: 999px; background: var(--chip); color: var(--muted); white-space: nowrap; }
.chip.ok { background: var(--ok-bg); color: var(--ok); }
.chip.err { background: var(--err-bg); color: var(--err); }
.chip.warn { background: var(--warn-bg); color: var(--warn); }

.layout { display: grid; grid-template-columns: 1fr; gap: 20px; padding: 20px; max-width: 1500px; margin: 0 auto; }
.layout.chat-open { grid-template-columns: minmax(0, 1fr) minmax(440px, 40%); }
section h2 { font-size: 14px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); margin: 22px 0 10px; }
section h2:first-child { margin-top: 0; }

.alerts { display: flex; flex-direction: column; gap: 6px; }
.alert { padding: 9px 12px; border-radius: 8px; font-size: 14px; overflow-wrap: anywhere; }
.alert.error { background: var(--err-bg); color: var(--err); }
.alert.warn { background: var(--warn-bg); color: var(--warn); }

.rooms { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(260px, 100%), 1fr)); gap: 14px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; box-shadow: var(--shadow); }
.card.emergency { border-color: var(--err); box-shadow: 0 0 0 1px var(--err) inset; }
.room-head { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.room-head h3 { margin: 0; font-size: 16px; }
.temp { font-size: 30px; font-weight: 600; margin: 6px 0 2px; }
.temp small { font-size: 14px; color: var(--muted); font-weight: 400; }
.badges { display: flex; flex-wrap: wrap; gap: 5px; margin: 6px 0; }
.sub { font-size: 13px; color: var(--muted); }
.channel { display: grid; grid-template-columns: 1fr 70px 42px; align-items: center; gap: 8px; font-size: 13px; margin-top: 6px; }
.bar { height: 6px; background: var(--chip); border-radius: 3px; overflow: hidden; }
.bar > span { display: block; height: 100%; background: var(--accent); }
.channel.emergency .bar > span { background: var(--err); }
.spark { margin-top: 10px; }
.spark svg { width: 100%; height: 70px; display: block; background: var(--chip); border-radius: 6px; }
.spark .act { fill: none; stroke: var(--text); stroke-width: 1.6; vector-effect: non-scaling-stroke; }
.spark .set { fill: none; stroke: var(--accent); stroke-width: 1.2; stroke-dasharray: 4 3; vector-effect: non-scaling-stroke; }
.spark .valve { fill: var(--accent); opacity: .18; }
.spark .emerg { fill: var(--err); opacity: .18; }
.spark-legend { display: flex; flex-wrap: wrap; gap: 10px; font-size: 12px; color: var(--muted); margin-top: 4px; }
.spark-legend .k::before { content: ""; display: inline-block; width: 10px; height: 3px; margin-right: 4px; vertical-align: middle; }
.spark-legend .k.act::before { background: var(--text); }
.spark-legend .k.set::before { background: var(--accent); }
.spark-legend .k.valve::before { background: var(--accent); opacity: .35; height: 8px; }
.therm { border-top: 1px dashed var(--line); margin-top: 10px; padding-top: 8px; font-size: 13px; color: var(--muted); }
.therm b { color: var(--text); font-weight: 500; }

table { width: 100%; border-collapse: collapse; background: var(--panel); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); font-size: 13px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 500; }
tr:last-child td { border-bottom: 0; }
.table-wrap { overflow-x: auto; }
.bad { color: var(--err); font-weight: 600; }
.meh { color: var(--warn); }

.chat { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); display: flex; flex-direction: column; height: calc(100vh - 100px); position: sticky; top: 76px; }
.chat-head { display: flex; align-items: center; gap: 8px; padding: 12px 14px; border-bottom: 1px solid var(--line); }
.chat-head h2 { margin: 0; font-size: 15px; flex: 1; }
.messages { flex: 1; overflow-y: auto; padding: 14px; display: flex; flex-direction: column; gap: 10px; }
.msg { padding: 9px 12px; border-radius: 10px; max-width: 95%; overflow-wrap: anywhere; }
.msg.user { background: var(--user); align-self: flex-end; white-space: pre-wrap; }
.msg.assistant { background: var(--chip); align-self: flex-start; }
.msg.assistant p { margin: 0 0 8px; } .msg.assistant p:last-child { margin: 0; }
.msg.assistant ul { margin: 4px 0 8px; padding-left: 20px; }
.msg.assistant code { font-size: 12.5px; background: var(--panel); padding: 1px 4px; border-radius: 4px; }
.msg.assistant h3, .msg.assistant h4, .msg.assistant h5 { margin: 12px 0 6px; font-size: 15px; }
.msg.assistant h3:first-child, .msg.assistant h4:first-child { margin-top: 0; }
.msg.assistant ol { margin: 4px 0 8px; padding-left: 22px; }
.msg.assistant li { margin: 2px 0; }
.msg.assistant li.nested { margin-left: 18px; list-style-type: circle; }
.msg.assistant blockquote { margin: 6px 0; padding: 4px 10px; border-left: 3px solid var(--line); color: var(--muted); }
.msg.assistant pre { background: var(--panel); padding: 8px; border-radius: 6px; overflow-x: auto; font-size: 12.5px; }
.msg.assistant pre code { padding: 0; }
.msg.assistant hr { border: 0; border-top: 1px solid var(--line); margin: 10px 0; }
.md-table { overflow-x: auto; margin: 6px 0 10px; }
.md-table table { font-size: 13px; border-radius: 6px; }
.md-table th, .md-table td { padding: 5px 8px; vertical-align: top; }
.md-table th { background: var(--panel); }
.msg.tool { font-size: 12px; color: var(--muted); align-self: flex-start; padding: 0 4px; }
.confirm { border: 1px solid var(--warn); background: var(--warn-bg); border-radius: 10px; padding: 10px 12px; }
.confirm h4 { margin: 0 0 8px; font-size: 14px; color: var(--warn); }
.confirm label { display: flex; gap: 8px; align-items: flex-start; margin: 6px 0; }
.confirm label input { width: auto; margin-top: 3px; }
.confirm .row { display: flex; gap: 8px; margin-top: 10px; }
.composer { display: flex; gap: 8px; padding: 12px; border-top: 1px solid var(--line); }
.composer textarea { resize: none; height: 44px; }
.thinking { font-size: 13px; color: var(--muted); padding: 0 4px; }
.empty { color: var(--muted); font-size: 14px; }

.login { max-width: 360px; margin: 12vh auto; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); }
.login h1 { margin: 0 0 4px; font-size: 20px; }
.login p { margin: 0 0 18px; color: var(--muted); }
.login label { display: block; font-size: 13px; color: var(--muted); margin: 12px 0 4px; }
.login button { width: 100%; margin-top: 18px; }
.login .error { color: var(--err); font-size: 14px; margin-top: 12px; min-height: 20px; }

@media (max-width: 1000px) {
  .layout.chat-open { grid-template-columns: 1fr; }
  .chat { position: static; height: 75vh; }
}
@media (max-width: 600px) {
  header { padding: 10px 14px; flex-wrap: wrap; position: static; gap: 8px; }
  header h1 { width: 100%; }
  header .spacer { display: none; }
  header button { padding: 5px 12px; }
  .layout { padding: 14px; }
}

main { min-width: 0; }
.channel span:first-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }