:root {
  --bg: #f4f3ef; --card: #ffffff; --fg: #1d1f23; --muted: #6b7078; --line: #e2e0d9;
  --accent: #1f6f5c; --warn-bg: #fff1d6; --warn-fg: #8a5200;
  --bat-bg: #ffe3df; --bat-fg: #a3281b; --shade: rgba(120, 120, 130, .16);
  --c-pv: #d98e04; --c-load: #2f6fdb; --c-bat: #1f9d6b; --c-grid: #7a6bd0; --grid-line: rgba(0,0,0,.08);
  --ok-bg: #dff1ea; --ok-fg: #14594a; --c-out: #cf4a39;
  --heat0: #efede6; --heat1: #ffe3df; --heat2: #ffc4bb; --heat3: #f08c7d; --heat4: #cf4a39;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a; --card: #1d2026; --fg: #e8e9ec; --muted: #9096a0; --line: #2c3038;
    --accent: #4cc2a1; --warn-bg: #3d2f12; --warn-fg: #f0c068;
    --bat-bg: #4a1f1b; --bat-fg: #ff9b8f; --shade: rgba(180, 180, 200, .14);
    --c-pv: #f0b429; --c-load: #6aa3ff; --c-bat: #49d49d; --c-grid: #a99cf0; --grid-line: rgba(255,255,255,.08);
    --ok-bg: #173b31; --ok-fg: #7fdcc0; --c-out: #ff7a6a;
    --heat0: #23262d; --heat1: #4a1f1b; --heat2: #6e2c25; --heat3: #a3382c; --heat4: #e0604f;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
.top { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; max-width: 1100px; margin: 0 auto; padding: 14px 16px 4px; }
.brand { font-size: 1.3rem; font-weight: 700; color: var(--fg); text-decoration: none; }
.top nav { display: flex; gap: 14px; flex: 1; }
.top nav a { color: var(--muted); text-decoration: none; padding: 4px 0; border-bottom: 2px solid transparent; }
.top nav a[aria-current="page"] { color: var(--fg); border-color: var(--accent); }
.who { display: flex; align-items: center; gap: 8px; margin: 0; color: var(--muted); font-size: .85rem; min-width: 0; }
.who span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 220px; }
a { color: var(--accent); }
h1 { font-size: 1.3rem; margin: 0; }
h3 { font-size: .95rem; margin: 14px 0 6px; }
h2 { font-size: 1rem; margin: 0 0 8px; }
h2 small { color: var(--muted); font-weight: 400; }
main { max-width: 1100px; margin: 0 auto; padding: 8px 16px 32px; }
button { font: inherit; cursor: pointer; }
button.link { background: none; border: 0; color: var(--muted); text-decoration: underline; padding: 4px; }

.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; margin: 8px 0 14px; }
.tile { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; display: flex; flex-direction: column; gap: 2px; }
.tile .k { color: var(--muted); font-size: .8rem; }
.tile .v { font-size: 1.35rem; font-weight: 600; font-variant-numeric: tabular-nums; }
.tile.on-battery { background: var(--bat-bg); border-color: transparent; }
.tile.on-battery .v { color: var(--bat-fg); }
.tile.stale { background: var(--warn-bg); border-color: transparent; }
.tile.stale .v { color: var(--warn-fg); }

.range { margin-bottom: 12px; }
.buttons { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.buttons button { background: var(--card); color: var(--fg); border: 0; padding: 7px 14px; border-right: 1px solid var(--line); }
.buttons button:last-child { border-right: 0; }
.buttons button.active { background: var(--accent); color: #fff; }
#custom { display: flex; flex-wrap: wrap; gap: 10px; align-items: end; margin-top: 10px; }
#custom label { display: flex; flex-direction: column; font-size: .8rem; color: var(--muted); gap: 2px; }
input { font: inherit; padding: 6px 8px; border: 1px solid var(--line); border-radius: 6px; background: var(--card); color: var(--fg); }

.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 12px; margin-bottom: 14px; }
.chart { width: 100%; min-height: 240px; }
.note { margin: 6px 0 0; color: var(--muted); font-size: .8rem; }
.error { color: var(--bat-fg); margin: 8px 0 0; }
.u-legend { font-size: .8rem; }

.login { display: grid; place-items: center; min-height: 100vh; padding: 16px; }
.login-card { width: 100%; max-width: 340px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 22px; }
.login-card h1 { margin-bottom: 14px; }
.login-card form { display: flex; flex-direction: column; gap: 12px; }
.login-card label { display: flex; flex-direction: column; gap: 4px; font-size: .85rem; color: var(--muted); }
.login-card input { font-size: 1rem; }

/* ---- buttons, forms ---- */
.btn { display: inline-block; background: var(--accent); color: #fff; border: 0; border-radius: 6px; padding: 8px 14px; text-decoration: none; line-height: 1.2; }
.btn.secondary { background: var(--card); color: var(--fg); border: 1px solid var(--line); }
.btn.danger { background: var(--bat-fg); color: #fff; }
@media (prefers-color-scheme: dark) { .btn { color: #0b1f19; } .btn.secondary { color: var(--fg); } .btn.danger { color: #2a0a07; } }
label { display: flex; flex-direction: column; gap: 4px; font-size: .85rem; color: var(--muted); }
label small, .note, .sub { color: var(--muted); font-size: .8rem; }
input[type=email], input[type=password], input[type=text], input:not([type]), input[type=date] { font-size: 1rem; }
.form { display: flex; flex-direction: column; gap: 14px; }
.form h2, .form p { margin: 0; }
fieldset { border: 0; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
legend { color: var(--muted); font-size: .85rem; padding: 0 0 6px; }
.choice, .check { flex-direction: row; align-items: flex-start; gap: 10px; color: var(--fg); font-size: .95rem; }
.choice { border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; }
.choice span, .check span { display: flex; flex-direction: column; gap: 2px; }
.choice input, .check input { margin-top: 3px; }
.check { font-size: .85rem; }
details summary { cursor: pointer; color: var(--muted); font-size: .85rem; margin-bottom: 8px; }
.inline { display: flex; flex-wrap: wrap; gap: 10px; align-items: end; margin: 0; }
.danger-zone { border-color: var(--bat-fg); }
.narrow { max-width: 640px; }
.crumbs { margin: 8px 0 4px; font-size: .85rem; }
.crumbs a { color: var(--muted); }

/* ---- page chrome ---- */
.pagehead { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; flex-wrap: wrap; margin: 8px 0 12px; }
.pagehead h1 { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
.sub { margin: 4px 0 0; }
.notice { background: var(--ok-bg); color: var(--ok-fg); border-radius: 8px; padding: 8px 12px; margin: 0 0 12px; }
.warnbox { background: var(--warn-bg); color: var(--warn-fg); border-radius: 8px; padding: 8px 12px; }
.empty p { color: var(--muted); }
code, pre { font: .85rem ui-monospace, SFMono-Regular, Menlo, monospace; }
pre { background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; overflow-x: auto; }
.secret { display: block; background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; word-break: break-all; user-select: all; font-size: 1rem; }
.big { font-size: 1.8rem; font-weight: 600; margin: 0; font-variant-numeric: tabular-nums; }

/* ---- device list and badges ---- */
.devices { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 10px; }
.device { display: grid; grid-template-columns: 1fr auto; gap: 2px 8px; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 12px; color: var(--fg); text-decoration: none; }
.device .name { font-weight: 600; }
.device .kind { color: var(--muted); font-size: .8rem; text-align: right; }
.device .state { font-size: 1.1rem; font-weight: 600; grid-column: 1 / -1; }
.device .seen { color: var(--muted); font-size: .8rem; grid-column: 1 / -1; }
.device.up .state { color: var(--accent); }
.device.down { background: var(--bat-bg); border-color: transparent; }
.device.down .state { color: var(--bat-fg); }
.device.wait .state { color: var(--warn-fg); }
.badge { display: inline-block; font-size: .75rem; font-weight: 500; padding: 2px 8px; border-radius: 999px; background: var(--ok-bg); color: var(--ok-fg); vertical-align: middle; }
.badge.down { background: var(--bat-bg); color: var(--bat-fg); }
.badge.wait { background: var(--warn-bg); color: var(--warn-fg); }

/* ---- tables and lists ---- */
.totals { display: flex; gap: 24px; margin: 0 0 12px; }
.totals div { display: flex; flex-direction: column; }
.totals dt { color: var(--muted); font-size: .8rem; }
.totals dd { margin: 0; font-size: 1.2rem; font-weight: 600; }
.filter { display: flex; flex-wrap: wrap; gap: 10px; align-items: end; margin: 0 0 12px; }
.tablewrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
th, td { text-align: left; padding: 7px 8px; border-bottom: 1px solid var(--line); white-space: nowrap; vertical-align: middle; }
th { color: var(--muted); font-size: .8rem; font-weight: 500; }
td form { margin: 0; }
.r { text-align: right; }
.pager { display: flex; justify-content: space-between; align-items: center; margin-top: 12px; color: var(--muted); }
.subs { list-style: none; margin: 0 0 8px; padding: 0; }
.subs li { display: flex; justify-content: space-between; align-items: center; padding: 6px 0; border-bottom: 1px solid var(--line); }
.subs form { margin: 0; }
.tg { margin-top: 10px; min-height: 40px; }

/* ---- calendar heatmap ---- */
.months { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 18px; }
.month h3 { margin: 0 0 6px; text-transform: capitalize; }
.heat { display: grid; grid-template-columns: repeat(7, 1fr); gap: 3px; max-width: 280px; }
.wd { color: var(--muted); font-size: .65rem; text-align: center; }
.cell { aspect-ratio: 1; border-radius: 4px; display: grid; place-items: center; font-size: .72rem; color: var(--fg); text-decoration: none; background: var(--heat0); }
.cell.empty { background: none; }
.cell.l1 { background: var(--heat1); } .cell.l2 { background: var(--heat2); } .cell.l3 { background: var(--heat3); }
.cell.l4 { background: var(--heat4); color: #fff; }
.legend { display: flex; align-items: center; gap: 4px; color: var(--muted); font-size: .75rem; margin: 10px 0 0; }
.legend i { width: 16px; height: 16px; display: inline-block; }
.act { padding: 2px 0; }
.act small { color: var(--muted); }