:root {
  --ink: #16171a;
  --ink-2: #5b5c61;
  --ink-3: #6a6b70;
  --ground: #f4f4f1;
  --surface: #fff;
  --line: #e3e3de;
  --line-2: #efefeb;
  --field: #d3d3cd;
  --link: #1c5cab;
  --link-hover: #104281;
  --focus: #2a78d6;
  --down: #2a78d6;
  --down-strong: #1c5cab;
  --up: #eb6834;
  --good: #0ca30c;
  --bad: #d03b3b;
  --bad-ink: #b4232a;
  --warn-bg: #fdf0e1;
  --warn-ink: #7a3d00;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --axis-ink: #898781;
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--ground); color: var(--ink); font-family: var(--sans); font-size: 14px; line-height: 1.45; }
a { color: var(--link); }
a:hover { color: var(--link-hover); }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 1px; }
[hidden] { display: none !important; }
.mono { font-family: var(--mono); font-size: 13px; }
.muted { color: var(--ink-3); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* shell */
.shell { display: flex; flex-wrap: wrap; min-height: 100vh; }
.side { flex: 1 1 230px; background: var(--ink); color: #c9c9c3; padding: 20px 12px; display: flex; flex-direction: column; gap: 2px; }
.brand { display: flex; align-items: center; gap: 12px; padding: 4px 10px 18px; color: #fff; }
.brand svg { flex: none; }
a.brand, a.brand:hover { color: #fff; text-decoration: none; }
.brand .wm { font-family: var(--mono); font-weight: 600; font-size: 16px; letter-spacing: 0.06em; line-height: 1.2; }
.brand .kana { font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", system-ui, sans-serif; font-size: 10px; letter-spacing: 0.3em; color: #8d8e93; margin-top: 2px; }
.srv { display: flex; align-items: center; gap: 8px; margin: 0 6px 16px; padding: 10px; border: 1px solid #2c2d32; border-radius: 8px; font-size: 12px; color: #c9c9c3; }
.srv strong { color: #fff; font-weight: 500; }
.side a.nav { display: flex; align-items: center; gap: 12px; min-height: 44px; padding: 0 12px; border-radius: 8px; color: #c9c9c3; text-decoration: none; font-weight: 500; }
.side a.nav:hover { background: #222328; color: #fff; }
.side a.nav.on { background: #2a2b31; color: #fff; }
.side .count { margin-left: auto; font-size: 12px; color: #8d8e93; }
.side .foot { margin-top: auto; padding: 16px 12px 0; font-size: 12px; color: #8d8e93; }
.side .foot button { background: none; border: 0; padding: 0; font: inherit; color: #c9c9c3; text-decoration: underline; cursor: pointer; }
.main { flex: 999 1 560px; min-width: 0; padding: 32px 32px 56px; }
.wrap { max-width: 1120px; margin: 0 auto; display: flex; flex-direction: column; gap: 20px; }
@media (max-width: 640px) { .main { padding: 20px 16px 40px; } }

/* page head */
.head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 12px; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; }
.titleline { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
h1 { margin: 0; font-size: 26px; font-weight: 600; letter-spacing: -0.01em; overflow-wrap: anywhere; }
.sub { margin: 4px 0 0; color: var(--ink-2); }
.back { font-size: 13px; margin-bottom: -8px; }

/* cards */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 20px; min-width: 0; }
.card.flush { padding: 8px; }
.card h2 { margin: 0; font-size: 16px; font-weight: 600; }
.cardhead { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 8px; }
.card.flush .cardhead { padding: 12px 12px 0; }
.lead { margin: 4px 0 16px; color: var(--ink-2); font-size: 13px; }
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.tile .k { color: var(--ink-2); font-size: 13px; }
.tile .v { font-size: 30px; font-weight: 600; margin-top: 6px; letter-spacing: -0.01em; display: flex; align-items: center; gap: 10px; }
.tile .v small { font-size: 18px; color: var(--ink-3); font-weight: 500; }
.tile .s { font-size: 13px; color: var(--ink-2); margin-top: 2px; }
.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 20px; }
.split { display: flex; flex-wrap: wrap; gap: 20px; align-items: flex-start; }
.split > .grow { flex: 3 1 440px; min-width: 0; }
.split > .aside { flex: 2 1 340px; min-width: 0; }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 40px; padding: 0 16px; border-radius: 8px; border: 1px solid var(--field); background: var(--surface); color: var(--ink); font: inherit; font-weight: 500; cursor: pointer; text-decoration: none; white-space: nowrap; }
.btn:hover { background: var(--ground); color: var(--ink); }
.btn:disabled { opacity: .5; cursor: default; }
.btn.primary { background: var(--ink); border-color: var(--ink); color: #fff; }
.btn.primary:hover { background: #2a2b31; color: #fff; }
.btn.danger { color: var(--bad-ink); border-color: #ecc4c1; }
.btn.danger:hover { background: #fbefee; color: var(--bad-ink); }
.btn.small { min-height: 36px; padding: 0 12px; }
.pill { min-height: 36px; padding: 0 14px; border-radius: 999px; border: 1px solid var(--field); background: var(--surface); font: inherit; font-size: 13px; font-weight: 500; color: #3d3e42; cursor: pointer; }
.pill.on { background: var(--ink); border-color: var(--ink); color: #fff; }
.pills { display: flex; flex-wrap: wrap; gap: 6px; }

/* status */
.cc { display: inline-block; margin-left: 6px; padding: 0 5px; border: 1px solid var(--line); border-radius: 4px; font-size: 11px; color: var(--ink-2); vertical-align: 1px; }
.badge { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 500; padding: 3px 10px; border-radius: 999px; background: #efefeb; color: #3d3e42; white-space: nowrap; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: #9a9b97; display: inline-block; flex: none; }
.dot.ok { background: var(--good); }
.dot.off { background: transparent; border: 1.5px solid #9a9b97; }
.dot.bad { background: var(--bad); }
.dot.warn { background: var(--up); }
.dot.big { width: 10px; height: 10px; }
.tag { display: inline-block; font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 999px; background: var(--warn-bg); color: var(--warn-ink); margin-left: 6px; vertical-align: 1px; }
.notice { display: flex; gap: 10px; align-items: flex-start; padding: 12px 14px; border-radius: 10px; background: var(--warn-bg); color: var(--warn-ink); font-size: 13px; }
.notice.err { background: #fbefee; color: var(--bad-ink); }
.notice .btn { margin-left: auto; }

/* tables */
.tbl { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 720px; }
table.narrow { min-width: 520px; }
th { text-align: left; font-size: 12px; font-weight: 600; color: var(--ink-2); padding: 10px 12px; border-bottom: 1px solid var(--line); white-space: nowrap; }
td { padding: 12px; border-bottom: 1px solid var(--line-2); vertical-align: middle; }
tr:last-child td { border-bottom: 0; }
.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
td .note { font-size: 12px; color: var(--ink-3); }
.empty { padding: 24px 12px; margin: 0; text-align: center; color: var(--ink-3); }

/* forms */
.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.field > label, .legend { font-size: 13px; font-weight: 500; }
input, select, textarea { font: inherit; min-height: 40px; padding: 8px 12px; border: 1px solid var(--field); border-radius: 8px; background: var(--surface); color: var(--ink); width: 100%; }
textarea { min-height: 120px; font-family: var(--mono); font-size: 12px; }
input[readonly] { background: #f7f7f4; color: var(--ink-2); }
.hint { font-size: 12px; color: var(--ink-3); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px 20px; }
.row { display: flex; gap: 8px; }
.row > input { flex: 1; min-width: 0; }
.check { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; cursor: pointer; }
.check input, .opt input { width: 18px; height: 18px; min-height: 0; margin: 2px 0 0; accent-color: var(--ink); flex: none; }
.sw { width: 18px; height: 18px; min-height: 0; margin: 0; accent-color: var(--ink); }
fieldset { border: 0; margin: 0; padding: 0; min-width: 0; display: flex; flex-direction: column; gap: 8px; }
.opt { display: flex; gap: 10px; align-items: flex-start; padding: 12px; border: 1px solid var(--line); border-radius: 10px; cursor: pointer; }
.opt:has(input:checked) { border-color: var(--ink); background: #fafaf8; }
.opt strong { font-weight: 500; }
.formfoot { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.section { margin-top: 24px; }

/* key/value lists */
.kv { display: grid; grid-template-columns: 140px minmax(0, 1fr); gap: 10px 16px; margin: 16px 0 0; font-size: 13px; }
.kv dt { color: var(--ink-2); }
.kv dd { margin: 0; min-width: 0; overflow-wrap: anywhere; }

/* checks */
.chk { display: flex; gap: 10px; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--line-2); font-size: 13px; }
.chk:last-child { border-bottom: 0; }
.chk b { font-weight: 500; min-width: 160px; }

/* activity */
.ev { display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--line-2); font-size: 13px; }
.ev:last-child { border-bottom: 0; }
.ev time { flex: none; width: 72px; white-space: nowrap; color: var(--ink-3); font-variant-numeric: tabular-nums; }

/* chart */
.legend-row { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 6px; font-size: 13px; color: var(--ink-2); }
.legend-row strong { color: var(--ink); }
.key { display: inline-block; width: 12px; height: 12px; border-radius: 3px; vertical-align: -1px; margin-right: 6px; }
.key.down { background: var(--down); }
.key.up { background: var(--up); }
.readout { min-height: 22px; margin-top: 14px; font-size: 13px; color: var(--ink-2); }
.readout strong { color: var(--ink); font-weight: 600; }
.chart { position: relative; height: 200px; margin-top: 6px; }
.chart.small { height: 180px; margin-top: 18px; }
.chart .gl { position: absolute; left: 0; right: 0; border-top: 1px solid var(--grid); }
.chart .gl.top { top: 0; }
.chart .gl.mid { top: 50%; }
.chart .gl.base { bottom: 0; border-color: var(--axis); }
.chart .yl { position: absolute; left: 0; font-size: 11px; color: var(--axis-ink); }
.chart .yl.top { top: -9px; }
.chart .yl.mid { top: calc(50% - 9px); }
.chart .bars { position: absolute; left: 56px; right: 0; top: 0; bottom: 1px; display: flex; gap: 2px; }
.chart .grp { flex: 1; min-width: 0; height: 100%; display: flex; align-items: flex-end; gap: 2px; padding: 0 1px; border: 0; background: transparent; cursor: default; border-radius: 4px; }
.chart .grp.on { background: #f0efec; }
.chart .grp span { display: block; flex: 1; min-width: 0; border-radius: 4px 4px 0 0; }
.chart .grp span.down { background: var(--down); }
.chart .grp span.up { background: var(--up); }
.chart .grp span.total { background: var(--down); }
.chart .grp.on span.total { background: var(--down-strong); }
.xaxis { display: flex; justify-content: space-between; margin: 8px 0 0 56px; font-size: 11px; color: var(--axis-ink); }
.chart.loading { opacity: .5; }
.chart .plot { position: absolute; left: 56px; right: 0; top: 0; bottom: 1px; }
.chart .plot svg { width: 100%; height: 100%; display: block; overflow: visible; }
.chart .band, .key.band { fill: var(--down); background: var(--down); opacity: .2; }
.chart .med { fill: none; stroke: var(--down); stroke-width: 1.75; stroke-linejoin: round; stroke-linecap: round; vector-effect: non-scaling-stroke; }
.chart .cursor { stroke: var(--axis); stroke-width: 1; vector-effect: non-scaling-stroke; }

/* latency in the peer list */
.lat { display: inline-flex; vertical-align: middle; align-items: center; justify-content: flex-end; gap: 8px; }
.lat .mono { min-width: 6ch; text-align: right; }
.latnote { font-size: 12px; color: var(--ink-3); }
.lat.stale, .latnote.stale { opacity: .5; }
.spark { width: 56px; height: 18px; display: block; flex: none; }
.spark polyline { fill: none; stroke: var(--down); stroke-width: 1.5; stroke-linejoin: round; stroke-linecap: round; }
.spark circle { fill: var(--down); }

/* config / log blocks */
pre.code, pre.log { margin: 0; padding: 14px; background: var(--ink); color: #e6e6e1; border-radius: 10px; font-family: var(--mono); font-size: 12px; line-height: 1.6; overflow-x: auto; white-space: pre; }
pre.log { line-height: 1.7; max-height: 420px; overflow-y: auto; }
.qr { width: 220px; height: 220px; border-radius: 10px; border: 1px solid var(--line); image-rendering: pixelated; background: #fff; }
.ph { display: grid; place-items: center; width: 200px; height: 200px; border: 1.5px dashed #b9b9b3; border-radius: 10px; color: var(--ink-3); font-size: 13px; text-align: center; background: #fafaf8; }

/* apply bar */
.applybar { position: sticky; bottom: 16px; display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; padding: 14px 16px; background: var(--ink); color: #e6e6e1; border-radius: 12px; z-index: 5; }
.applybar .btn { border-color: #3a3b41; background: #2a2b31; color: #fff; }
.applybar .btn.primary { background: #fff; color: var(--ink); border-color: #fff; }

/* dialog */
dialog { border: 0; border-radius: 14px; padding: 0; width: min(640px, calc(100vw - 32px)); max-height: calc(100vh - 32px); color: var(--ink); box-shadow: 0 20px 60px rgba(0,0,0,.25); }
dialog::backdrop { background: rgba(22, 23, 26, .55); }
.dlg { padding: 24px; display: flex; flex-direction: column; gap: 16px; }
.dlg h2 { margin: 0; font-size: 18px; font-weight: 600; }
.dlg p { margin: 0; color: var(--ink-2); }
.dlg .foot { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 8px; }
.qrrow { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }
.qrrow .col { display: flex; flex-direction: column; gap: 8px; }
.qr.small { width: 168px; height: 168px; }
.kv.grow { flex: 1 1 240px; margin: 0; }
.pinrow { display: flex; align-items: center; gap: 12px; }
.pinval { font-family: var(--mono); font-size: 22px; font-weight: 600; letter-spacing: 0.3em; }
.linkopts { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px 20px; align-items: end; padding: 4px 0 4px 40px; }

/* toast */
.toasts { position: fixed; right: 16px; bottom: 16px; display: flex; flex-direction: column; gap: 8px; z-index: 50; max-width: calc(100vw - 32px); }
.toast { background: var(--ink); color: #fff; padding: 12px 16px; border-radius: 10px; font-size: 13px; box-shadow: 0 8px 24px rgba(0,0,0,.2); max-width: 420px; }
.toast.err { background: var(--bad-ink); }

/* login */
.loginpage { min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 48px; padding: 32px 16px; background: var(--ink); color: #f4f4f1; }
.loginbox { width: 100%; max-width: 360px; display: flex; flex-direction: column; align-items: center; gap: 40px; }
.loginbox .brand { flex-direction: column; gap: 18px; padding: 0; text-align: center; }
.loginbox .brand .wm { font-size: 24px; letter-spacing: 0.18em; margin-right: -0.18em; }
.loginbox .brand .kana { font-size: 12px; letter-spacing: 0.4em; margin: 6px -0.4em 0 0; }
.loginform { width: 100%; display: flex; flex-direction: column; gap: 14px; }
.loginform .field > label { color: #c9c9c3; }
.loginform input { min-height: 44px; font-size: 15px; background: #1f2024; border-color: #34353b; color: #fff; }
.loginform input:focus { outline: none; border-color: var(--focus); box-shadow: 0 0 0 3px rgba(42, 120, 214, .25); }
.loginform .btn { min-height: 44px; width: 100%; margin-top: 10px; font-size: 15px; font-weight: 600; background: #f4f4f1; border-color: #f4f4f1; color: var(--ink); }
.loginform .btn:hover { background: #fff; border-color: #fff; color: var(--ink); }
.signin .ja { display: none; font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", system-ui, sans-serif; letter-spacing: 0.1em; }
.signin:hover:not(:disabled) .en { display: none; }
.signin:hover:not(:disabled) .ja { display: inline; }
.loginform .err-text { color: #ff8a80; }
.loginform .err-text:empty { display: none; }
.loginfoot { margin: 0; font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: #8d8e93; }
.err-text { color: var(--bad-ink); font-size: 13px; margin: 0; }
/* setup link page (setup.html): same dark look as the login page */
.setuppage { min-height: 100vh; display: flex; justify-content: center; padding: 48px 16px; background: var(--ink); color: #f4f4f1; font-size: 15px; }
.setuppage .loading-page { color: #8d8e93; }
.setupbox { width: 100%; max-width: 400px; display: flex; flex-direction: column; gap: 24px; margin: auto 0; }
.setupbox h1 { font-size: 22px; }
.setupbox p { margin: 0; color: #c9c9c3; }
.setupbox a { color: #9cc3f5; }
.setupbox a:hover { color: #fff; }
.setupbox .center, .setupbox.center { text-align: center; display: flex; flex-direction: column; align-items: center; gap: 8px; }
.setupbox.center { gap: 20px; }
.setupbox .ghost { opacity: .45; }
.setupbox p.note { text-align: center; font-size: 12px; color: #8d8e93; }
.setupbox .brand { padding: 0; }
.setupbox .brand.stack { flex-direction: column; gap: 14px; }
.setupbox .brand .wm { font-size: 16px; letter-spacing: 0.12em; }
.setupbox .brand.stack .wm { font-size: 18px; letter-spacing: 0.18em; margin-right: -0.18em; }
.setupbox strong.mono { color: #fff; font-weight: 500; }
.loginform input.pin { min-height: 56px; font-family: var(--mono); font-size: 24px; letter-spacing: 0.5em; text-align: center; }
.setupbox .notice { background: #3a2a14; color: #f6d3a6; }
.steps { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 20px; }
.steps li { display: flex; gap: 14px; }
.steps li > div { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 10px; }
.steps .num { flex: none; width: 28px; height: 28px; border-radius: 50%; border: 1px solid #3a3b41; display: grid; place-items: center; font-family: var(--mono); font-size: 13px; }
.steps strong { font-weight: 500; }
.steps p { font-size: 13px; }
.steps .btn { min-height: 48px; width: 100%; }
.steps .btn:not(.primary) { background: #222328; border-color: #3a3b41; color: #fff; }
.steps .btn.primary { background: #f4f4f1; border-color: #f4f4f1; color: var(--ink); font-weight: 600; }
.steps .qr { width: 100%; height: auto; max-width: 280px; align-self: center; }
.loading-page { padding: 40px; color: var(--ink-3); }