:root {
  --bg: #0f172a; --card: #1e293b; --card2: #273449; --text: #e2e8f0; --muted: #94a3b8; --line: #334155;
  --up: #22c55e; --down: #ef4444; --unknown: #64748b; --disabled: #475569; --accent: #3b82f6; --warn: #f59e0b;
  --radius: 10px; --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.45 var(--font); }
a { color: #93c5fd; text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 1.5rem; margin: 0 0 .75rem; }
h2 { font-size: 1.05rem; margin: 0 0 .6rem; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
code, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .92em; }
.small, small { font-size: .85em; }
.muted { color: var(--muted); }
.inline { display: inline; }

header.top { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .7rem 16px; background: var(--card); border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.brand { font-weight: 700; font-size: 1.1rem; color: var(--text); display: flex; align-items: center; gap: .5rem; }
header nav { display: flex; gap: .25rem; flex-wrap: wrap; align-items: center; }
header nav a, header nav button.link { padding: .4rem .7rem; border-radius: 6px; color: var(--text); background: none; border: 0; font: inherit; cursor: pointer; }
header nav a.active { background: var(--card2); }
header nav a:hover, header nav button.link:hover { background: var(--card2); text-decoration: none; }
main { max-width: 1200px; margin: 0 auto; padding: 1.2rem 16px 2rem; }
footer { text-align: center; color: var(--muted); font-size: .8rem; padding: 1rem; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.1rem; margin-bottom: 1.1rem; }
.card-narrow { max-width: 620px; }
.table-wrap { overflow-x: auto; padding: 0; }
.page-head { display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-bottom: .8rem; flex-wrap: wrap; }
.page-head h1 { margin: 0; display: flex; align-items: center; gap: .6rem; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: .8rem; margin-bottom: 1.1rem; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: .8rem 1rem; display: flex; flex-direction: column; gap: .15rem; overflow: hidden; }
.stat b { font-size: 1.6rem; line-height: 1.1; }
.stat small { color: var(--muted); }
.stat-up b { color: var(--up); } .stat-down b { color: var(--down); } .stat-unknown b { color: var(--muted); }

.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: .6rem .8rem; border-bottom: 1px solid var(--line); vertical-align: middle; }
.table th { color: var(--muted); font-weight: 600; font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; }
.table tbody tr:last-child td { border-bottom: 0; }
.table-compact th, .table-compact td { padding: .35rem .6rem; }
.row-down td { background: rgba(239, 68, 68, .08); }
.actions-cell { white-space: nowrap; text-align: right; }
.actions-cell form { margin-left: .25rem; }

.badge { display: inline-block; padding: .15rem .55rem; border-radius: 999px; font-size: .72rem; font-weight: 700; letter-spacing: .04em; color: #fff; }
.badge-up { background: var(--up); } .badge-down { background: var(--down); } .badge-unknown { background: var(--unknown); } .badge-disabled { background: var(--disabled); }
.dot { display: inline-block; width: 11px; height: 11px; border-radius: 50%; background: var(--unknown); vertical-align: middle; }
.dot-up { background: var(--up); } .dot-down { background: var(--down); box-shadow: 0 0 0 3px rgba(239,68,68,.25); } .dot-unknown { background: var(--unknown); }
.dots .dot { margin-right: 4px; cursor: help; }
.dot-skip { background: transparent; border: 1px dashed var(--line); }
.agents-pick { border: 1px solid var(--line); border-radius: 8px; padding: .6rem .8rem; margin-bottom: .8rem; }
.agents-pick legend { font-weight: 600; font-size: .9rem; padding: 0 .3rem; }
.agents-pick legend small { font-weight: 400; color: var(--muted); }
.inline-check { display: inline-flex !important; margin: .2rem 1rem .2rem 0; font-weight: 400; }
.legend { display: inline-block; width: 14px; height: 4px; vertical-align: middle; border-radius: 2px; }

.flash { padding: .7rem 1rem; border-radius: 8px; margin-bottom: 1rem; border: 1px solid; }
.flash-ok { background: rgba(34,197,94,.12); border-color: rgba(34,197,94,.4); }
.flash-error { background: rgba(239,68,68,.12); border-color: rgba(239,68,68,.4); }

form label { display: block; margin-bottom: .8rem; font-weight: 600; font-size: .9rem; }
form label small { display: block; font-weight: 400; color: var(--muted); margin-top: .2rem; }
form label.check { display: flex; align-items: center; gap: .5rem; }
input[type=text], input[type=password], input[type=number], input[type=email], select {
  display: block; width: 100%; margin-top: .3rem; padding: .5rem .65rem; background: var(--bg); color: var(--text);
  border: 1px solid var(--line); border-radius: 7px; font: inherit;
}
input:focus, select:focus { outline: 2px solid var(--accent); border-color: transparent; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 1rem; }
.actions { display: flex; gap: .5rem; margin-top: .5rem; flex-wrap: wrap; }
.btn { display: inline-block; padding: .5rem .9rem; border-radius: 7px; border: 0; background: var(--accent); color: #fff; font: inherit; font-weight: 600; cursor: pointer; }
.btn:hover { filter: brightness(1.1); text-decoration: none; }
.btn-secondary { background: var(--card2); color: var(--text); }
.btn-danger { background: var(--down); }
.btn-sm { padding: .3rem .6rem; font-size: .8rem; }
pre.copy { background: var(--bg); border: 1px solid var(--line); padding: .8rem; border-radius: 8px; overflow-x: auto; white-space: pre-wrap; word-break: break-all; }

.chart { width: 100%; height: auto; display: block; }
.chart .grid { stroke: var(--line); stroke-width: 1; }
.chart .axis { fill: var(--muted); font-size: 11px; }
.chart .fail { stroke: var(--down); stroke-width: 1.5; opacity: .7; }

@media (max-width: 700px) {
  .grid2 { grid-template-columns: 1fr; }
  .table th, .table td { padding: .45rem .5rem; }
  .actions-cell { white-space: normal; }
}