:root {
  --bg: #f6f7f9; --panel: #fff; --text: #1d2330; --muted: #6b7385; --line: #e3e6ec;
  --accent: #2463eb; --accent-text: #fff; --danger: #c62828; --ok: #1b8a4b; --warn: #b26a00;
  --row-h: 44px; --radius: 8px;
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #12151b; --panel: #1b2029; --text: #e6e9ef; --muted: #98a0b3; --line: #2a303c; --accent: #5b8cff; }
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--text); }
[hidden] { display: none !important; }
.center { min-height: 100%; display: grid; place-items: center; padding: 16px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.login { width: min(380px, 100%); display: grid; gap: 12px; }
.login h1 { margin: 0; }
label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
input, select, textarea, button { font: inherit; color: inherit; }
input, select, textarea { background: var(--bg); border: 1px solid var(--line); border-radius: 6px; padding: 8px 10px; min-width: 0; }
button { border: 1px solid var(--line); border-radius: 6px; padding: 8px 14px; background: var(--panel); cursor: pointer; }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
button.danger { color: var(--danger); border-color: var(--danger); background: transparent; }
button.ghost { background: transparent; }
.muted { color: var(--muted); font-size: 13px; }
.error { color: var(--danger); min-height: 1em; margin: 0; font-size: 13px; }
.spacer { flex: 1; }

#app-view { display: flex; flex-direction: column; height: 100vh; height: 100dvh; }
.topbar { display: flex; align-items: center; gap: 12px; padding: 10px 16px; background: var(--panel); border-bottom: 1px solid var(--line); }
.brand { font-size: 17px; }
.badge { font-size: 12px; padding: 2px 8px; border-radius: 999px; background: var(--ok); color: #fff; }
.badge.offline { background: var(--warn); }
.toolbar { display: flex; gap: 8px; padding: 12px 16px; flex-wrap: wrap; }
.toolbar input[type=search] { flex: 1 1 240px; }

.list-head, .row { display: grid; grid-template-columns: 2fr 1.4fr 1fr 1.6fr; gap: 8px; align-items: center; padding: 0 16px; }
.list-head { font-size: 12px; color: var(--muted); padding-bottom: 6px; border-bottom: 1px solid var(--line); }
.viewport { flex: 1; overflow-y: auto; position: relative; contain: strict; }
.spacer-y { width: 1px; }
.rows { position: absolute; top: 0; left: 0; right: 0; will-change: transform; }
.row { height: var(--row-h); border-bottom: 1px solid var(--line); cursor: pointer; white-space: nowrap; }
.row > span { overflow: hidden; text-overflow: ellipsis; }
.row:hover, .row:focus { background: color-mix(in srgb, var(--accent) 8%, transparent); outline: none; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13px; }
.kind { font-size: 12px; padding: 2px 8px; border-radius: 4px; background: var(--bg); justify-self: start; }
.statusbar { display: flex; justify-content: space-between; padding: 6px 16px; border-top: 1px solid var(--line); background: var(--panel); font-size: 13px; }

dialog { border: none; padding: 0; background: transparent; width: min(520px, calc(100% - 32px)); }
dialog::backdrop { background: rgb(0 0 0 / .4); }
#node-form { display: grid; gap: 10px; }
#node-form h2 { margin: 0 0 4px; font-size: 18px; }
.actions { display: flex; gap: 8px; align-items: center; margin-top: 6px; }

/* スマートフォン: 設置場所列を隠し 3 列に */
@media (max-width: 640px) {
  .list-head, .row { grid-template-columns: 1.6fr 1.3fr .9fr; }
  .hide-sm { display: none; }
  #me { display: none; }
  .toolbar button.primary { flex: 1 1 100%; }
}