:root {
  color-scheme: light;
  --bg: #f4f6f5;
  --surface: #ffffff;
  --surface-soft: #e9eeec;
  --surface-strong: #dde5e2;
  --ink: #15201d;
  --muted: #64716d;
  --line: #d7dfdc;
  --accent: #247568;
  --accent-soft: #dcece7;
  --blue: #326d9e;
  --blue-soft: #e1ebf4;
  --amber: #a46b18;
  --amber-soft: #f7ead6;
  --red: #b74a48;
  --red-soft: #f7e4e2;
  --shadow: 0 12px 34px rgba(22, 42, 37, 0.07);
  --radius: 8px;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #111716;
  --surface: #18201f;
  --surface-soft: #222c2a;
  --surface-strong: #2b3734;
  --ink: #edf3f1;
  --muted: #9aa8a4;
  --line: #2d3a37;
  --accent: #6bb8ab;
  --accent-soft: #173b35;
  --blue: #7eb5df;
  --blue-soft: #203344;
  --amber: #e1a653;
  --amber-soft: #3b2d19;
  --red: #ee8580;
  --red-soft: #402322;
  --shadow: 0 16px 42px rgba(0, 0, 0, 0.24);
}

* { box-sizing: border-box; }

html, body { min-width: 320px; min-height: 100%; margin: 0; }

body {
  color: var(--ink);
  background: var(--bg);
  font-family: "Segoe UI", "Microsoft YaHei UI", "PingFang SC", sans-serif;
  font-size: 14px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}

svg { width: 1em; height: 1em; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }

[hidden] { display: none !important; }

.eyebrow {
  margin: 0 0 4px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

/* boot + login ------------------------------------------------ */

.boot-screen {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--muted);
  background: var(--bg);
  z-index: 40;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.login-view {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-panel {
  width: min(360px, 100%);
  padding: 28px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.login-mark {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 22px;
  color: var(--accent);
  background: var(--accent-soft);
}

.login-panel h1 { margin: 0; font-size: 22px; }

.field { display: flex; flex-direction: column; gap: 6px; font-size: 13px; }
.field > span { color: var(--muted); }

input[type="text"],
input[type="password"],
input[type="search"],
input[type="url"] {
  width: 100%;
  padding: 9px 11px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  font: inherit;
}

input:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.form-error { margin: 0; min-height: 16px; font-size: 12px; color: var(--red); }

button {
  font: inherit;
  cursor: pointer;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: background 0.12s ease, border-color 0.12s ease, color 0.12s ease;
}

.primary-button {
  padding: 9px 16px;
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
  font-weight: 600;
}
.primary-button:hover { filter: brightness(1.06); }

.secondary-button {
  padding: 8px 14px;
  color: var(--ink);
  background: var(--surface-soft);
  border-color: var(--line);
}
.secondary-button:hover { background: var(--surface-strong); }

.quiet-button {
  padding: 7px 12px;
  color: var(--muted);
  background: transparent;
  border-color: var(--line);
}
.quiet-button:hover { color: var(--ink); background: var(--surface-soft); }

.icon-button {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  font-size: 15px;
  color: var(--muted);
  background: var(--surface);
  border-color: var(--line);
}
.icon-button:hover { color: var(--accent); border-color: var(--accent); }

/* shell ------------------------------------------------------- */

.app-view { max-width: 1320px; margin: 0 auto; padding: 18px 22px 48px; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-bottom: 14px;
}

.brand { display: flex; align-items: center; gap: 10px; }
.brand span strong { display: block; font-size: 15px; }
.brand small { color: var(--muted); font-size: 11px; letter-spacing: 0.12em; }

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-size: 18px;
  color: var(--accent);
  background: var(--accent-soft);
}

.topbar-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.refresh-stamp { font-size: 12px; color: var(--muted); }

.toggle-field {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
}
.toggle-field input { accent-color: var(--accent); }

.layout { display: flex; flex-direction: column; gap: 14px; }

.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.panel-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 14px 16px 10px;
}
.panel-heading h2 { margin: 0; font-size: 15px; display: flex; align-items: center; gap: 8px; }
.panel-hint { font-size: 12px; color: var(--muted); }

.count-badge {
  display: inline-grid;
  place-items: center;
  min-width: 24px;
  height: 20px;
  padding: 0 7px;
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

/* stats ------------------------------------------------------- */

.stats-panel { padding: 14px 16px 16px; display: flex; flex-wrap: wrap; gap: 18px; }

.stat-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(96px, 1fr));
  gap: 10px;
  flex: 1 1 420px;
}

.stat-card {
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}
.stat-card .stat-label { display: block; font-size: 11px; letter-spacing: 0.1em; color: var(--muted); text-transform: uppercase; }
.stat-card strong { font-size: 24px; font-variant-numeric: tabular-nums; }
.stat-online strong { color: var(--accent); }
.stat-offline strong { color: var(--red); }
.stat-native strong { color: var(--blue); }

.version-block { flex: 1 1 360px; display: flex; flex-direction: column; gap: 8px; justify-content: center; }
.version-heading { display: flex; justify-content: space-between; gap: 10px; font-size: 12px; color: var(--muted); }
.version-note { color: var(--muted); }

.version-bar {
  display: flex;
  height: 12px;
  border-radius: 999px;
  overflow: hidden;
  background: var(--surface-soft);
  border: 1px solid var(--line);
}
.version-bar .segment { height: 100%; }
.version-bar .segment + .segment { border-left: 1px solid var(--surface); }

.version-legend { display: flex; flex-wrap: wrap; gap: 12px; font-size: 12px; color: var(--muted); }
.version-legend .legend-item { display: inline-flex; align-items: center; gap: 6px; }
.version-legend .swatch { width: 9px; height: 9px; border-radius: 2px; display: inline-block; }
.version-legend b { color: var(--ink); font-variant-numeric: tabular-nums; }

/* toolbar ----------------------------------------------------- */

.toolbar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

.search-field {
  position: relative;
  display: flex;
  align-items: center;
  flex: 1 1 260px;
  max-width: 420px;
}
.search-field svg { position: absolute; left: 10px; font-size: 15px; color: var(--muted); }
.search-field input { padding-left: 32px; background: var(--surface); }

.segmented {
  display: inline-flex;
  padding: 2px;
  gap: 2px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface);
}
.segmented-item {
  padding: 6px 12px;
  font-size: 13px;
  color: var(--muted);
  background: transparent;
  border: none;
}
.segmented-item:hover { color: var(--ink); }
.segmented-item.is-active { color: var(--ink); background: var(--surface-soft); font-weight: 600; }

.attention-button { color: var(--amber); border-color: var(--amber); }
.attention-button.is-active { background: var(--amber-soft); }

/* device grid ------------------------------------------------- */

.device-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(248px, 1fr));
  gap: 10px;
  padding: 0 16px 16px;
}

.device-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.device-card:hover { border-color: var(--accent); }

.device-card-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.device-name {
  font-weight: 600;
  font-size: 14px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.device-name.is-default { color: var(--amber); }

.device-badges { display: flex; flex-wrap: wrap; gap: 6px; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 1px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  border: 1px solid transparent;
  white-space: nowrap;
}
.badge-v08 { color: var(--accent); background: var(--accent-soft); border-color: var(--accent-soft); }
.badge-v05 { color: var(--muted); background: var(--surface-soft); border-color: var(--line); }
.badge-unknown { color: var(--amber); background: var(--amber-soft); border-color: var(--amber-soft); }
.badge-native { color: var(--blue); background: var(--blue-soft); border-color: var(--blue-soft); }
.badge-plain { color: var(--muted); background: transparent; border-color: var(--line); font-weight: 500; }
.badge-attention { color: var(--amber); background: var(--amber-soft); border-color: var(--amber-soft); }

.device-meta {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2px 10px;
  font-size: 12px;
  color: var(--muted);
}
.device-meta dt { white-space: nowrap; }
.device-meta dd { margin: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--ink); }
.device-meta dd.mono { font-family: "Cascadia Mono", "Consolas", monospace; font-size: 11px; }

.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  display: inline-block;
  background: var(--accent);
}
.dot.off { background: var(--red); }

/* offline table ---------------------------------------------- */

.device-table { padding: 0 6px 10px; overflow-x: auto; }

.device-row {
  display: grid;
  grid-template-columns: minmax(140px, 1.4fr) 96px minmax(120px, 1fr) 120px 88px;
  gap: 10px;
  align-items: center;
  padding: 8px 10px;
  font-size: 13px;
  border-top: 1px solid var(--line);
}
.device-row:first-child { border-top: none; }
.device-row.head {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  border-top: none;
}
.device-row .cell-muted { color: var(--muted); font-size: 12px; }
.device-row .cell-name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.empty-state { padding: 8px 16px 20px; color: var(--muted); font-size: 13px; }

/* compact panel (enrollment) ---------------------------------- */

.compact-panel { padding: 0; }
.compact-panel > summary {
  padding: 12px 16px;
  cursor: pointer;
  font-size: 13px;
  color: var(--muted);
  list-style: none;
}
.compact-panel > summary::-webkit-details-marker { display: none; }
.compact-panel > summary::before { content: "▸ "; }
.compact-panel[open] > summary::before { content: "▾ "; }
.compact-panel[open] > summary { border-bottom: 1px solid var(--line); color: var(--ink); }

.compact-content { display: flex; flex-direction: column; gap: 10px; padding: 14px 16px 16px; max-width: 520px; }
.input-action { display: flex; gap: 8px; }
.input-action input { flex: 1; }

/* toast ------------------------------------------------------- */

.toast {
  position: fixed;
  left: 50%;
  bottom: 26px;
  transform: translate(-50%, 12px);
  padding: 9px 16px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--surface);
  font-size: 13px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.16s ease, transform 0.16s ease;
  z-index: 50;
}
.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 720px) {
  .app-view { padding: 14px; }
  .stat-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .device-row { grid-template-columns: minmax(110px, 1.4fr) 80px 1fr; }
  .device-row .cell-hide { display: none; }
}