:root {
  --bg: #0b1017;
  --surface: #121a25;
  --surface-2: #19232f;
  --border: #243142;
  --text: #e3e9f1;
  --muted: #8796a8;
  --accent: #53d6a0;
  --accent-ink: #062418;
  --warn: #f0b74a;
  --danger: #ef5d5d;
  --info: #5aa9f0;
  --radius: 12px;
  --mono: ui-monospace, "JetBrains Mono", "Cascadia Mono", Consolas, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.hidden { display: none !important; }

/* ---- top bar ---- */
.topbar {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; gap: 20px;
  padding: 12px 24px;
  background: rgba(11, 16, 23, .9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: .02em; font-size: 15px; }
.logo {
  width: 22px; height: 22px; border-radius: 6px; background: var(--surface-2);
  background-image: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'><path d='M5 17h5l3-7 4 13 3-6h7' stroke='%2353d6a0' stroke-width='2.8' fill='none' stroke-linecap='round' stroke-linejoin='round'/></svg>");
}
.wd-status { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 13px; }
.top-actions { margin-left: auto; display: flex; gap: 8px; }

.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--muted); flex: none; }
.dot.on { background: var(--accent); box-shadow: 0 0 0 4px rgba(83, 214, 160, .15); }
.dot.off { background: var(--danger); box-shadow: 0 0 0 4px rgba(239, 93, 93, .15); }

main { max-width: 1280px; margin: 0 auto; padding: 24px; display: grid; gap: 24px; }

/* ---- summary ---- */
.summary { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
.stat {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px 16px;
}
.stat .k { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .06em; }
.stat .v { font-size: 26px; font-weight: 700; font-variant-numeric: tabular-nums; margin-top: 2px; }

/* ---- instance cards ---- */
.instances { display: grid; grid-template-columns: repeat(auto-fill, minmax(420px, 1fr)); gap: 16px; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; display: grid; gap: 14px;
}
.card.offline { border-color: rgba(239, 93, 93, .35); }
.card-head { display: flex; align-items: flex-start; gap: 12px; }
.card-head .titles { min-width: 0; flex: 1; }
.card-head h3 { margin: 0; font-size: 17px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.card-head .sub { color: var(--muted); font-size: 12px; font-family: var(--mono); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pill {
  display: inline-flex; align-items: center; gap: 6px; padding: 3px 10px; border-radius: 999px;
  font-size: 12px; font-weight: 600; background: var(--surface-2); border: 1px solid var(--border); white-space: nowrap;
}
.pill.on { color: var(--accent); border-color: rgba(83, 214, 160, .35); }
.pill.off { color: var(--danger); border-color: rgba(239, 93, 93, .35); }

.players { display: flex; align-items: baseline; gap: 8px; }
.players .num { font-size: 34px; font-weight: 800; font-variant-numeric: tabular-nums; line-height: 1; }
.players .max { color: var(--muted); font-size: 15px; }
.bar { height: 6px; background: var(--surface-2); border-radius: 3px; overflow: hidden; }
.bar > span { display: block; height: 100%; background: var(--accent); border-radius: 3px; transition: width .4s; }
.bar > span.full { background: var(--warn); }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px 14px; }
.grid .k { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .05em; }
.grid .v { font-variant-numeric: tabular-nums; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.chart { background: var(--surface-2); border-radius: 8px; padding: 8px 10px 4px; }
.chart .chart-head { display: flex; justify-content: space-between; color: var(--muted); font-size: 11px; }
.chart svg { display: block; width: 100%; height: 70px; }

.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag { font-size: 11px; color: var(--muted); background: var(--surface-2); border-radius: 4px; padding: 1px 7px; font-family: var(--mono); }

.err { color: var(--danger); font-size: 13px; font-family: var(--mono); }

.actions { display: flex; flex-wrap: wrap; gap: 8px; border-top: 1px solid var(--border); padding-top: 14px; }

/* ---- buttons ---- */
.btn {
  appearance: none; border: 1px solid var(--border); background: var(--surface-2); color: var(--text);
  padding: 7px 14px; border-radius: 8px; font: inherit; font-weight: 600; cursor: pointer;
  transition: background .15s, border-color .15s, opacity .15s;
}
.btn:hover { border-color: #3a4b60; background: #1f2b39; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn.primary:hover { background: #6be3b0; }
.btn.danger { color: var(--danger); border-color: rgba(239, 93, 93, .4); }
.btn.danger:hover { background: rgba(239, 93, 93, .12); }
.btn.warn { color: var(--warn); border-color: rgba(240, 183, 74, .4); }
.btn.warn:hover { background: rgba(240, 183, 74, .1); }
.btn.go { color: var(--accent); border-color: rgba(83, 214, 160, .4); }
.btn.go:hover { background: rgba(83, 214, 160, .1); }
.btn.ghost { background: transparent; }
.btn.busy { opacity: .6; pointer-events: none; }

/* ---- events ---- */
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.panel h2 { margin: 0 0 12px; font-size: 15px; }
.events { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; max-height: 320px; overflow: auto; }
.events li { display: grid; grid-template-columns: 80px 140px 1fr; gap: 12px; padding: 6px 4px; border-bottom: 1px solid var(--border); font-size: 13px; }
.events li:last-child { border-bottom: 0; }
.events .t { color: var(--muted); font-family: var(--mono); }
.events .i { font-family: var(--mono); overflow: hidden; text-overflow: ellipsis; }
.events .bad { color: var(--danger); }
.events .empty { color: var(--muted); display: block; }

/* ---- login ---- */
.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-box {
  width: 100%; max-width: 340px; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px; display: grid; gap: 10px;
}
.login-box .brand { margin-bottom: 10px; }
.login-box label { color: var(--muted); font-size: 13px; }
input, select {
  background: var(--bg); color: var(--text); border: 1px solid var(--border); border-radius: 8px;
  padding: 9px 12px; font: inherit;
}
input:focus, select:focus { outline: 2px solid rgba(83, 214, 160, .4); border-color: var(--accent); }
.error { color: var(--danger); min-height: 1.5em; margin: 0; font-size: 13px; }

/* ---- dialogs ---- */
dialog {
  background: var(--surface); color: var(--text); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 0; width: min(460px, calc(100vw - 32px));
}
dialog::backdrop { background: rgba(0, 0, 0, .6); }
.dialog-body { padding: 22px; display: grid; gap: 12px; }
.dialog-body h3 { margin: 0; }
.dialog-body p { margin: 0; color: var(--muted); }
.dialog-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 6px; }
.versions-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.versions-table td { padding: 7px 4px; border-bottom: 1px solid var(--border); }
.versions-table td:first-child { font-family: var(--mono); word-break: break-all; }
.versions-table .cur { color: var(--accent); font-weight: 600; }

/* ---- toasts ---- */
.toasts { position: fixed; right: 16px; bottom: 16px; display: grid; gap: 8px; z-index: 50; }
.toast {
  background: var(--surface-2); border: 1px solid var(--border); border-left: 3px solid var(--accent);
  padding: 10px 14px; border-radius: 8px; max-width: 360px; box-shadow: 0 6px 24px rgba(0,0,0,.4);
  animation: slide .2s ease-out;
}
.toast.bad { border-left-color: var(--danger); }
@keyframes slide { from { transform: translateY(8px); opacity: 0; } }

@media (max-width: 560px) {
  main { padding: 16px; }
  .topbar { padding: 10px 16px; gap: 10px; flex-wrap: wrap; }
  .instances { grid-template-columns: 1fr; }
  .summary { grid-template-columns: repeat(2, 1fr); }
  .stat .v { font-size: 22px; }
  .grid { grid-template-columns: repeat(2, 1fr); }
  .events li { grid-template-columns: 64px 1fr; }
  .events .i { display: none; }
}