:root {
  color-scheme: light dark;

  --bg: #ffffff;
  --panel: #f6f7f9;
  --border: #d9dce1;
  --text: #16181d;
  --muted: #5c6370;
  --accent: #2f6f4f;
  --warn: #8a6100;
  --error: #9c2b2b;
  --code-bg: #eceef1;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --panel: #1b1e24;
    --border: #2c313a;
    --text: #e6e8ec;
    --muted: #99a1ae;
    --accent: #74c69d;
    --warn: #e0b352;
    --error: #e08585;
    --code-bg: #22262d;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
  max-width: 60rem;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", sans-serif;
}

h1 { font-size: 1.5rem; margin: 0 0 .5rem; }
h2 { font-size: 1rem; margin: 0 0 .75rem; letter-spacing: .02em; }

.lede { color: var(--muted); margin: 0 0 2rem; max-width: 48rem; }
.note { color: var(--muted); font-size: .85rem; margin: .75rem 0 0; }

code {
  background: var(--code-bg);
  border-radius: 3px;
  padding: .1em .35em;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: .88em;
  word-break: break-all;
}

section {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.1rem 1.25rem;
  margin-bottom: 1.25rem;
}

dl { display: grid; grid-template-columns: 11rem 1fr; gap: .45rem 1rem; margin: 0; }
dt { color: var(--muted); }
dd { margin: 0; }

.state { font-weight: 600; }
.state.up { color: var(--accent); }
.state.down { color: var(--muted); }

.count {
  color: var(--muted);
  font-weight: 400;
}

form { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; }
label { color: var(--muted); font-size: .85rem; }

input[type="text"] {
  flex: 1 1 16rem;
  min-width: 0;
  padding: .45rem .6rem;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 5px;
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: .88rem;
}

button {
  padding: .45rem .85rem;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 5px;
  font-size: .88rem;
  cursor: pointer;
}

button:hover:not(:disabled) { border-color: var(--accent); }
button:disabled { opacity: .45; cursor: not-allowed; }
button.inline { padding: .1rem .45rem; font-size: .78rem; }
button.danger { border-color: var(--error); color: var(--error); }

.actions { display: flex; gap: .5rem; margin-top: .75rem; }

table { width: 100%; border-collapse: collapse; margin-top: .75rem; }
th, td { text-align: left; padding: .4rem .5rem; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 500; font-size: .8rem; }
tr.empty td { color: var(--muted); text-align: center; padding: 1.25rem; border: none; }

#log {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 22rem;
  overflow-y: auto;
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: .82rem;
}

#log li {
  display: flex;
  gap: .75rem;
  padding: .28rem 0;
  border-bottom: 1px solid var(--border);
}

#log time { color: var(--muted); flex: 0 0 5.5rem; }
#log span { word-break: break-word; }

.log-ok span { color: var(--accent); }
.log-warn span { color: var(--warn); }
.log-error span { color: var(--error); }
.log-info span { color: var(--muted); }