:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --ink: #1c2230;
  --muted: #6b7280;
  --line: #e3e6eb;
  --brand: #2f6df6;
  --brand-ink: #ffffff;
  --error: #c0392b;
  --radius: 12px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1420;
    --card: #171d2b;
    --ink: #e8eaf0;
    --muted: #9aa4b2;
    --line: #2a3244;
    --brand: #4f86ff;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
}
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; padding: 12px 16px; background: var(--card);
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 700; text-decoration: none; color: var(--ink); }
.topbar nav { display: flex; align-items: center; gap: 12px; }
.who { color: var(--muted); font-size: 14px; }
.container { max-width: 720px; margin: 0 auto; padding: 16px; }
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px; margin-bottom: 16px;
}
.card.narrow { max-width: 380px; margin: 40px auto; }
h1 { font-size: 1.4rem; margin: 0 0 12px; }
label { display: block; margin: 12px 0; font-size: 14px; color: var(--muted); }
input, select, textarea {
  width: 100%; padding: 10px 12px; margin-top: 4px; font-size: 16px;
  border: 1px solid var(--line); border-radius: 8px;
  background: var(--bg); color: var(--ink);
}
button {
  font: inherit; cursor: pointer; border: none; border-radius: 8px;
  padding: 10px 16px;
}
button.primary, button.link { font-weight: 600; }
button.primary { background: var(--brand); color: var(--brand-ink); width: 100%; }
button.link {
  background: none; color: var(--brand); padding: 4px; text-decoration: underline;
}
form.inline { display: inline; margin: 0; }
.error { color: var(--error); font-weight: 600; }

/* nav */
.topbar nav a { color: var(--brand); text-decoration: none; font-size: 14px; font-weight: 600; }
.topbar nav a:hover { text-decoration: underline; }

/* flashes */
.flash {
  background: #e7f6ec; color: #1e7d43; border: 1px solid #b7e2c5;
  padding: 8px 12px; border-radius: 8px; font-weight: 600;
}
@media (prefers-color-scheme: dark) {
  .flash { background: #12341f; color: #7fe0a0; border-color: #1f5c36; }
}

/* device status banner */
.status {
  display: flex; align-items: center; gap: 8px; margin-bottom: 16px;
  padding: 8px 12px; border-radius: 8px; font-weight: 600; font-size: 14px;
}
.status .dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.status.ok { background: rgba(46,160,80,.14); color: #2ea050; }
.status.ok .dot { background: #2ea050; }
.status.down { background: rgba(192,57,43,.14); color: var(--error); }
.status.down .dot { background: var(--error); }

/* key/value + grids */
.kv div, .grid { }
.kv div { display: flex; justify-content: space-between; padding: 6px 0; border-bottom: 1px solid var(--line); }
.kv span { color: var(--muted); }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 16px; }
@media (max-width: 480px) { .grid { grid-template-columns: 1fr; } }

/* lists */
.list { list-style: none; padding: 0; margin: 8px 0; }
.list li {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 8px 0; border-bottom: 1px solid var(--line);
}
.list a { text-decoration: none; color: var(--ink); }
.list a:hover { color: var(--brand); }

/* inline add rows */
.row { display: flex; gap: 8px; align-items: end; }
.row.wrap { flex-wrap: wrap; }
.row input[type=text], .row input[type=date], .row input[type=time] { width: auto; flex: 1 1 auto; }
.tiny { font-size: 12px; }
button.compact { width: auto; padding: 10px 14px; }
.danger { color: var(--error) !important; }

/* schedule / job tables */
table.sched { width: 100%; border-collapse: collapse; font-size: 14px; }
table.sched th, table.sched td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); }
table.sched th { color: var(--muted); font-weight: 600; }
.muted-row td { color: var(--muted); }
.tag { font-size: 12px; padding: 2px 8px; border-radius: 999px; background: var(--line); }
.tag-blue { background: rgba(47,109,246,.16); color: var(--brand); }
.tag-green { background: rgba(46,160,80,.16); color: #2ea050; }
.tag-red { background: rgba(192,57,43,.16); color: var(--error); }

/* message editor split + receipt preview */
.split { display: flex; gap: 16px; align-items: flex-start; }
.split .grow { flex: 1 1 60%; }
.split .preview { flex: 0 0 220px; text-align: center; }
@media (max-width: 640px) { .split { flex-direction: column; } .split .preview { flex: 1 1 auto; width: 100%; } }
.receipt { width: 200px; max-width: 100%; background: #fff; border: 1px solid var(--line); border-radius: 6px; }
fieldset.mode { border: 1px solid var(--line); border-radius: 8px; padding: 10px; margin: 12px 0; }
.radio { display: inline-flex; align-items: center; gap: 6px; margin-right: 14px; }
.radio input { width: auto; margin: 0; }
label.check { display: flex; align-items: center; gap: 8px; color: var(--ink); }
label.check input { width: auto; margin: 0; }
code { background: var(--line); padding: 1px 5px; border-radius: 4px; font-size: 0.9em; }
textarea { resize: vertical; }
hr { border: none; border-top: 1px solid var(--line); margin: 16px 0; }