:root {
  --bg: #f4f5f7;
  --surface: #ffffff;
  --surface-2: #eef0f3;
  --border: #d9dde3;
  --text: #1b1f24;
  --muted: #5d6673;
  --accent: #e8590c;
  --accent-text: #ffffff;
  --ok: #2b8a3e;
  --warn: #c77700;
  --err: #c92a2a;
  --info: #1971c2;
  --radius: 10px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111418;
    --surface: #1a1e24;
    --surface-2: #232830;
    --border: #2f3540;
    --text: #e6e9ee;
    --muted: #96a0ad;
    --accent: #ff7a2e;
    --accent-text: #160a02;
    --ok: #51cf66;
    --warn: #fcc419;
    --err: #ff6b6b;
    --info: #4dabf7;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

h1, h2, h3 { margin: 0; font-weight: 650; }
h1 { font-size: 1.25rem; }
h2 { font-size: 1.05rem; }
h3 { font-size: 0.95rem; }
a { color: var(--info); }
code { font-family: var(--mono); font-size: 0.9em; }

.topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand .sub { color: var(--muted); font-size: 0.85rem; }
.conn { display: flex; gap: 8px; align-items: center; }

.banner {
  margin: 16px 20px 0;
  padding: 12px 14px;
  border-radius: var(--radius);
  border: 1px solid;
}
.banner.warn { border-color: var(--warn); color: var(--warn); background: color-mix(in srgb, var(--warn) 10%, transparent); }

main {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  padding: 16px 20px;
  max-width: 1200px;
  margin: 0 auto;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}
.card.wide { grid-column: 1 / -1; }
.card-head {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
}

.row { display: flex; flex-wrap: wrap; gap: 8px; }
.row.tight { gap: 12px; align-items: center; }

button {
  font: inherit;
  font-size: 0.9rem;
  padding: 7px 12px;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  cursor: pointer;
  white-space: nowrap;
}
button:hover:not(:disabled) { border-color: var(--muted); }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-weight: 600; }
button.primary:hover:not(:disabled) { filter: brightness(1.08); border-color: var(--accent); }
button.ghost { background: transparent; }
button:disabled { opacity: 0.45; cursor: not-allowed; }
button:focus-visible, input:focus-visible, select:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

input, select {
  font: inherit;
  font-size: 0.9rem;
  padding: 6px 8px;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  width: 100%;
  min-width: 0;
}

.fields { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.fields.inline { display: flex; flex-wrap: wrap; }
.fields.inline label { width: 130px; }
label { display: flex; flex-direction: column; gap: 4px; font-size: 0.8rem; color: var(--muted); }
label.toggle { flex-direction: row; align-items: center; gap: 6px; font-size: 0.85rem; cursor: pointer; }
label.toggle input { width: auto; }

.pill {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid currentColor;
  white-space: nowrap;
}
.pill.off { color: var(--muted); }
.pill.ok { color: var(--ok); }
.pill.busy { color: var(--warn); }
.pill.err { color: var(--err); }
.pill.info { color: var(--info); }

.kv { display: grid; grid-template-columns: max-content 1fr; gap: 4px 16px; margin: 0; }
.kv dt { color: var(--muted); font-size: 0.85rem; }
.kv dd { margin: 0; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.kv.small dt, .kv.small dd { font-size: 0.8rem; }

.gauges { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; }
.gauge { background: var(--surface-2); border-radius: 8px; padding: 8px 10px; display: flex; flex-direction: column; }
.gauge .label { font-size: 0.75rem; color: var(--muted); }
.gauge .value { font-size: 1.15rem; font-weight: 650; font-variant-numeric: tabular-nums; }
.progress { height: 6px; background: var(--surface-2); border-radius: 3px; overflow: hidden; }
.progress > div { height: 100%; width: 0; background: var(--accent); transition: width 0.4s; }

.slots { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.slot {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--bg);
  min-width: 0;
}
.slot-head { display: grid; grid-template-columns: auto 1fr auto; gap: 10px; align-items: center; }
.slot-type { font-size: 0.8rem; color: var(--muted); }
.swatch {
  width: 34px; height: 34px; border-radius: 50%;
  border: 2px solid var(--border);
  background: repeating-linear-gradient(45deg, var(--surface-2) 0 4px, transparent 4px 8px);
}
.slot-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.slot-actions button { padding: 6px 8px; font-size: 0.82rem; }
.slot-actions .span2 { grid-column: 1 / -1; }

.raw { display: flex; gap: 10px; align-items: flex-end; flex-wrap: wrap; }
.raw label { width: 200px; }
.raw label.grow { flex: 1; min-width: 180px; }

.log {
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--mono);
  font-size: 0.78rem;
  max-height: 360px;
  overflow: auto;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.log li { padding: 4px 10px; border-bottom: 1px solid var(--border); display: grid; grid-template-columns: 70px 34px 1fr; gap: 8px; }
.log li:last-child { border-bottom: 0; }
.log .t { color: var(--muted); }
.log .d { font-weight: 700; }
.log .m { white-space: pre-wrap; overflow-wrap: anywhere; }
.log .tx .d { color: var(--info); }
.log .rx .d { color: var(--ok); }
.log .err .d, .log .err .m { color: var(--err); }
.log .sys .d { color: var(--muted); }
.log .hex { display: block; color: var(--muted); }
.log:empty::before { content: "No messages yet."; display: block; padding: 10px; color: var(--muted); font-family: system-ui, sans-serif; }

footer { text-align: center; color: var(--muted); font-size: 0.8rem; padding: 8px 20px 24px; }

@media (max-width: 900px) {
  .slots { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 720px) {
  main { grid-template-columns: 1fr; padding: 16px; }
  .topbar { padding: 12px 16px; }
  .gauges { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .fields { grid-template-columns: 1fr 1fr; }
  .log li { grid-template-columns: 58px 28px 1fr; }
}
@media (max-width: 420px) {
  .slots { grid-template-columns: 1fr; }
  .fields { grid-template-columns: 1fr; }
  .fields.inline label, .raw label { width: 100%; }
}