:root,
[data-theme="dark"] {
  --bg: #171717;
  --surface: #262626;
  --inset: #404040;
  --chip: #525252;
  --text: #f5f5f5;
  --text-secondary: #d4d4d4;
  --muted: #a3a3a3;
  --border: rgba(255, 255, 255, 0.08);
  --row-hover: color-mix(in srgb, #3b82f6 9%, #262626);
  --chip-fg: #f5f5f5;
  --accent: #3a5fe8;
  --accent-hover: #5476f0;
  --success: #228738;
  --warn: #ffb114;
  --danger: #de3412;
  --info: #0b78cb;
  --radius: 8px;
  color-scheme: dark;
}

[data-theme="light"] {
  --bg: #fafafa;
  --surface: #ffffff;
  --inset: #f5f5f5;
  --chip: #e5e5e5;
  --text: #171717;
  --text-secondary: #404040;
  --muted: #737373;
  --border: rgba(0, 0, 0, 0.09);
  --row-hover: #f3f8ff;
  --chip-fg: #262626;
  color-scheme: light;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Pretendard", "Apple SD Gothic Neo", sans-serif;
}

h2 { margin: 0; font-size: 0.95rem; }
code { font: 0.85rem ui-monospace, SFMono-Regular, Menlo, monospace; }
[hidden] { display: none !important; }

.meta { color: var(--muted); font-size: 0.78rem; }
.error { color: var(--danger); min-height: 1.2em; margin: 0; }
.pad { padding: 16px; margin: 0; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 20px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.topbar__right { display: flex; align-items: center; gap: 10px; }
.brand { font-size: 1rem; }

main { max-width: 1520px; margin: 0 auto; padding: 20px; }

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
.panel-actions { display: flex; align-items: center; gap: 8px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 36px;
  padding: 0 14px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: var(--inset);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost { background: transparent; border-color: var(--border); }
.btn-ghost:hover { background: var(--inset); }
.btn-danger { background: transparent; border-color: var(--danger); color: var(--danger); }
.btn-danger:hover { background: color-mix(in srgb, var(--danger) 12%, transparent); }
.btn-sm { min-height: 30px; padding: 0 10px; font-size: 0.8rem; }

.chip {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--chip);
  color: var(--chip-fg);
  font-size: 0.74rem;
  font-weight: 600;
  white-space: nowrap;
}
.chip--quiet { background: transparent; color: var(--text-secondary); box-shadow: inset 0 0 0 1px var(--border); }
.chip--ok { background: var(--success); color: #fff; }
.chip--warn { background: var(--warn); color: #1e2124; }
.chip--danger { background: var(--danger); color: #fff; }
.chip--info { background: var(--info); color: #fff; }
.chips { display: flex; flex-wrap: wrap; gap: 4px; }

.seg {
  display: inline-flex;
  padding: 2px;
  border-radius: var(--radius);
  background: var(--inset);
}
.seg__btn {
  padding: 4px 10px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--text-secondary);
  font: inherit;
  font-size: 0.78rem;
  cursor: pointer;
}
.seg__btn.active { background: var(--surface); color: var(--text); }

.field {
  width: 100%;
  min-height: 38px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--inset);
  color: var(--text);
  font: inherit;
}

.table-wrap { overflow-x: auto; }

.fleet { min-width: 1080px; }
.fleet-grid {
  display: grid;
  grid-template-columns: 150px minmax(260px, 1.1fr) minmax(220px, 1fr) minmax(220px, 1fr);
  column-gap: 20px;
  align-items: start;
}
.device-grid {
  display: grid;
  grid-template-columns: minmax(156px, 1.2fr) 138px minmax(168px, 1fr) 52px;
  column-gap: 14px;
  align-items: start;
  min-width: 0;
}
.fleet__head {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 600;
}
.fleet__row {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}
.fleet__row:last-child { border-bottom: 0; }
.fleet__row:hover { background: var(--row-hover); }
.fleet__prop,
.fleet__devices,
.fleet__side,
.device__main,
.device__ip,
.device__ssh { min-width: 0; }
.fleet__prop strong {
  display: block;
  font-size: 0.95rem;
  line-height: 1.35;
  word-break: keep-all;
}
.device + .device {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}
.device__name {
  margin-top: 4px;
  font-weight: 600;
  line-height: 1.35;
  word-break: keep-all;
}
.device__ip code,
.ssh__host,
.ssh__host code {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.device__ver {
  font: 0.82rem ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--text-secondary);
}
.ota-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto minmax(0, 1fr) auto auto;
  column-gap: 8px;
  row-gap: 6px;
  align-items: center;
}
.ota__name:nth-child(6n + 4) { padding-left: 16px; }
.ota__name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.82rem;
  font-weight: 600;
}
.ota__when {
  min-width: 3.4em;
  color: var(--muted);
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
  text-align: right;
  white-space: nowrap;
}
.side__label {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 600;
}
.sync-block {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}
.sync-line {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto;
  column-gap: 8px;
  row-gap: 4px;
  align-items: center;
}
.sync-item__name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
}
.sync-item__name:nth-child(4n + 3) { padding-left: 16px; }
.sync-item__when {
  color: var(--muted);
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.data-table { width: 100%; border-collapse: collapse; }
.data-table th,
.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}
.data-table th { color: var(--muted); font-size: 0.74rem; font-weight: 600; }
.data-table tbody tr:hover { background: var(--row-hover); }

.summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}
.summary__card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
  padding: 14px 16px;
  background: var(--surface);
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}
.summary__card.is-on { box-shadow: inset 0 0 0 2px var(--accent); }
.summary__card.is-bad .summary__value { color: var(--danger); }
.summary__value { font-size: 1.35rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.summary__value small { margin-left: 4px; color: var(--text-secondary); font-size: 0.72rem; font-weight: 600; }

.collectors { margin-bottom: 16px; }
.collectors.is-on { box-shadow: inset 0 0 0 2px var(--accent); }
.collector-list { display: grid; }
.collector {
  display: grid;
  grid-template-columns: minmax(140px, 180px) auto minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  padding: 12px 16px;
  border-top: 1px solid var(--border);
}
.collector p { margin: 0; color: var(--text-secondary); }

.property { border-bottom: 1px solid var(--border); }
.property:last-child { border-bottom: 0; }
.property__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  padding: 12px 16px;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}
.property__head:hover,
.property.is-open .property__head { background: var(--row-hover); }
.property__head strong { display: block; font-size: 0.98rem; }
.property.is-problem .property__head strong { box-shadow: inset 3px 0 0 var(--danger); padding-left: 8px; }
.property__chevron {
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--text-secondary);
  border-bottom: 2px solid var(--text-secondary);
  transform: rotate(45deg);
}
.property.is-open .property__chevron { transform: rotate(225deg); }
.property__body { display: grid; gap: 16px; padding: 4px 16px 16px; }
.channel-group h3 { margin: 0 0 8px; color: var(--text-secondary); font-size: 0.75rem; font-weight: 700; }
.channel-list { display: grid; gap: 6px; }
.channel, .device {
  display: grid;
  grid-template-columns: minmax(120px, 1.2fr) auto auto minmax(0, 1fr);
  gap: 10px 12px;
  align-items: center;
  padding: 8px 10px;
  border-radius: var(--radius);
}
.fleet .channel, .fleet .device {
  grid-template-columns: minmax(0, 1fr) auto;
  padding: 4px 0;
  background: transparent;
}
.fleet .device .actions, .fleet .device .meta, .fleet .channel .meta { grid-column: 1 / -1; }
.channel.is-problem, .device.is-problem { background: color-mix(in srgb, var(--danger) 8%, transparent); }
.channel .meta, .device .meta { color: var(--text-secondary); }
.when { color: var(--text-secondary); font-variant-numeric: tabular-nums; white-space: nowrap; }
.more { position: relative; }
.more > summary { list-style: none; }
.more > summary::-webkit-details-marker { display: none; }
.more__menu {
  position: absolute;
  right: 0;
  z-index: 2;
  display: grid;
  gap: 4px;
  min-width: 120px;
  margin-top: 4px;
  padding: 6px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}
@media (max-width: 800px) {
  .collector, .channel, .device { grid-template-columns: 1fr auto; }
}

.actions { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 6px; }
#commands-panel { margin-top: 16px; }
.cmd-log { display: grid; gap: 12px; padding: 16px; }
.cmd-entry { display: grid; gap: 6px; }
.cmd-entry__head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.cmd-out {
  margin: 0;
  max-height: 320px;
  overflow: auto;
  padding: 10px 12px;
  border-radius: var(--radius);
  background: var(--inset);
  color: var(--text-secondary);
  font: 0.78rem/1.45 ui-monospace, SFMono-Regular, Menlo, monospace;
  white-space: pre-wrap;
  word-break: break-all;
}

.login { max-width: 380px; margin: 12vh auto 0; }
.login__form { display: grid; gap: 10px; padding: 16px; }