:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --line: #e4e4e7;
  --line-soft: #f0f1f3;
  --text: #18181b;
  --text-2: #52525b;
  --muted: #8b8b93;
  --brand: #2563eb;
  --brand-soft: #eff5ff;
  --ok: #10b981;
  --ok-soft: #ecfdf5;
  --warn: #f59e0b;
  --warn-soft: #fffbeb;
  --bad: #ef4444;
  --bad-soft: #fef2f2;
  --lime: #84cc16;
  --yellow: #facc15;
  --orange: #fb923c;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 1px 3px rgba(16, 24, 40, .06);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  display: flex; align-items: center; gap: 22px;
  padding: 0 22px; height: 56px;
  background: #fff; border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 20;
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 650; letter-spacing: .2px; }
.brand .ver { color: var(--muted); font-weight: 400; font-size: 12px; }
.pulse {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--ok); box-shadow: 0 0 0 3px rgba(16, 185, 129, .16);
}
.nav { display: flex; gap: 4px; flex: 1; }
.nav a {
  color: var(--text-2); padding: 6px 12px; border-radius: 8px; font-weight: 500;
}
.nav a:hover { background: var(--line-soft); text-decoration: none; }
.nav a.active { background: var(--brand-soft); color: var(--brand); }
.logout { display: flex; align-items: center; gap: 10px; margin: 0; }
.who { color: var(--muted); font-size: 12px; }

.wrap { max-width: 1180px; margin: 22px auto 48px; padding: 0 18px; display: flex; flex-direction: column; gap: 16px; }
.foot { text-align: center; color: var(--muted); font-size: 12px; padding: 0 18px 28px; }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow);
}
.card.narrow { max-width: 420px; margin: 60px auto 0; }
.card.highlight { border-color: #bfdbfe; background: linear-gradient(180deg, #f8fbff, #fff); }
h1 { font-size: 19px; margin: 0 0 10px; }
h2 { font-size: 15px; margin: 0 0 12px; }
.muted { color: var(--muted); }
.hint { color: var(--muted); font-size: 12px; margin: 8px 0 0; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12.5px; }
.empty { color: var(--muted); text-align: center; padding: 26px 0; }
.nowrap { white-space: nowrap; }
.strong { font-weight: 650; }

.stack { display: flex; flex-direction: column; gap: 14px; }
.row { display: flex; gap: 14px; align-items: flex-end; flex-wrap: wrap; }
.row.tight { gap: 10px; }
.field { display: flex; flex-direction: column; gap: 6px; min-width: 160px; }
.field.grow { flex: 1; }
.field.sm { min-width: 128px; }
.field > span { font-size: 12.5px; color: var(--text-2); font-weight: 500; }
.field > em { font-size: 11.5px; color: var(--muted); font-style: normal; }
input[type=text], input[type=number], input[type=password], input:not([type]), select {
  border: 1px solid var(--line); border-radius: 9px; padding: 8px 10px;
  font: inherit; background: #fff; color: var(--text); width: 100%;
}
input:focus, select:focus { outline: 2px solid #bfdbfe; border-color: #93c5fd; }

.btn {
  border: 1px solid var(--line); background: #fff; color: var(--text);
  border-radius: 9px; padding: 8px 14px; font: inherit; cursor: pointer; font-weight: 500;
}
.btn:hover { background: var(--line-soft); }
.btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn.primary:hover { background: #1d4ed8; }
.btn.primary:disabled { background: #c7cdd6; border-color: #c7cdd6; cursor: not-allowed; }
.btn.ghost { background: transparent; }
.btn.sm { padding: 5px 10px; font-size: 12.5px; }
.btn.danger { color: var(--bad); }
.btn.danger:hover { background: var(--bad-soft); }

.tabs { display: flex; gap: 8px; flex-wrap: wrap; }
.tab { display: inline-flex; align-items: center; gap: 7px; border: 1px solid var(--line); border-radius: 9px; padding: 8px 13px; cursor: pointer; background: #fff; }
.tab input { margin: 0; }
.tab:has(input:checked) { border-color: var(--brand); background: var(--brand-soft); color: var(--brand); font-weight: 600; }

.opts { display: none; gap: 14px; flex-wrap: wrap; align-items: flex-end; padding: 14px; border: 1px dashed var(--line); border-radius: 10px; background: #fcfcfd; }
.opts.active { display: flex; }
.opts .hint { flex-basis: 100%; margin: 0; }
.checks { display: flex; gap: 16px; align-items: center; }
.check { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; }

.nodes { border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px 14px; }
.nodes legend { font-size: 13px; font-weight: 600; padding: 0 6px; display: flex; align-items: center; gap: 8px; }
.node-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(268px, 1fr)); gap: 8px; }
.node-pick {
  display: flex; flex-direction: column; gap: 5px; padding: 9px 11px;
  border: 1px solid var(--line); border-radius: 9px; cursor: pointer; background: #fff;
}
.node-pick:hover { border-color: #c7d2fe; }
.node-pick:has(input:checked) { border-color: var(--brand); background: var(--brand-soft); }
.node-pick:has(input:disabled) { opacity: .45; cursor: not-allowed; }
.pick-head { display: flex; align-items: center; gap: 8px; }
.node-pick .node-name {
  font-weight: 550; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.node-meta {
  display: flex; align-items: center; gap: 6px; flex-wrap: wrap;
  font-size: 11.5px; color: var(--muted); line-height: 1.35;
}
.node-meta .geo { flex-basis: 100%; margin-top: 1px; }
.geo { color: var(--muted); font-size: 12px; }

.tag { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11.5px; font-weight: 500; background: var(--line-soft); color: var(--text-2); }
.tag.ping { background: #eef2ff; color: #4f46e5; }
.tag.tcping { background: #ecfeff; color: #0891b2; }
.tag.http { background: #f5f3ff; color: #7c3aed; }
.tag.cap { background: #f4f4f5; color: #52525b; margin-right: 4px; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11.5px; background: var(--line-soft); color: var(--text-2); }
.badge.ok { background: var(--ok-soft); color: #047857; }
.badge.warn { background: var(--warn-soft); color: #b45309; }
.badge.muted { background: #f4f4f5; color: var(--muted); }

.flash { padding: 10px 14px; border-radius: 10px; border: 1px solid var(--line); background: #fff; }
.flash.ok { background: var(--ok-soft); border-color: #a7f3d0; color: #047857; }
.flash.warn { background: var(--warn-soft); border-color: #fde68a; color: #b45309; }
.flash.error { background: var(--bad-soft); border-color: #fecaca; color: #b91c1c; }

table.grid { width: 100%; border-collapse: collapse; }
table.grid th {
  text-align: center; font-size: 12px; font-weight: 600; color: var(--text-2);
  padding: 9px 10px; background: #fafafa; border-bottom: 1px solid var(--line); white-space: nowrap;
}
table.grid th.left, table.grid td.left { text-align: left; }
table.grid td { text-align: center; padding: 9px 10px; border-bottom: 1px solid var(--line-soft); vertical-align: middle; }
table.grid tbody tr:hover { background: #fcfcfd; }
table.grid tr.failed { background: var(--bad-soft); }
table.grid tr.failed:hover { background: #fee2e2; }
table.grid tr.disabled { opacity: .55; }
td.err { color: #b91c1c; text-align: left; font-size: 12.5px; }
td.node { font-weight: 600; white-space: nowrap; }
.node em.host, td .host { display: block; font-style: normal; color: var(--muted); font-size: 11.5px; font-weight: 400; }
td.ok { color: #047857; }
td.warn { color: #b45309; }
td.bad { color: #b91c1c; font-weight: 600; }
td.s2 { color: #047857; font-weight: 600; }
td.s4 { color: #b45309; font-weight: 600; }
td.s5 { color: #b91c1c; font-weight: 600; }

table.kv { width: 100%; border-collapse: collapse; }
table.kv td { padding: 6px 10px 6px 0; border-bottom: 1px solid var(--line-soft); }
table.kv td:first-child { color: var(--muted); width: 190px; }

.bars { display: flex; align-items: flex-end; gap: 1px; height: 26px; }
.bars i { display: block; width: 3px; border-radius: 1px 1px 0 0; }
.bars i.lost { background: var(--bad); height: 26px !important; }

.run-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; flex-wrap: wrap; }
.run-actions { display: flex; gap: 8px; align-items: center; }
.run-actions form { margin: 0; }
.summary { display: flex; gap: 26px; flex-wrap: wrap; margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--line-soft); }
.stat { display: flex; flex-direction: column; gap: 2px; }
.stat .k { font-size: 12px; color: var(--muted); }
.stat .v { font-size: 17px; font-weight: 650; }
.pending { margin-top: 12px; color: var(--warn); font-size: 13px; }

.cmd { display: flex; align-items: center; gap: 10px; margin: 12px 0; }
.cmd code {
  flex: 1; background: #0b1220; color: #e2e8f0; padding: 12px 14px; border-radius: 10px;
  overflow-x: auto; white-space: nowrap; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12.5px;
}
.steps { margin: 0; padding-left: 20px; color: var(--text-2); }
.steps li { margin-bottom: 7px; }
.row-actions { white-space: nowrap; }
.row-actions form { display: inline-block; margin: 0 4px 0 0; }
.actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }

@media (max-width: 760px) {
  .wrap { padding: 0 10px; }
  .card { padding: 14px; overflow-x: auto; }
  table.grid { font-size: 12.5px; }
  .summary { gap: 16px; }
}