/* Black, white and grey only: a DOWN monitor is an inverted row, never a colour. */
:root {
  --bg: #ffffff;
  --fg: #000000;
  --muted: #595959;
  --line: #d4d4d4;
  --panel: #f5f5f5;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #000000;
  --fg: #ffffff;
  --muted: #a3a3a3;
  --line: #333333;
  --panel: #111111;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.45 var(--mono);
}

[hidden] { display: none !important; }

a { color: inherit; }

:focus-visible { outline: 2px solid var(--fg); outline-offset: 2px; }

h1, h2 { font-weight: 700; margin: 0; }
h1 { font-size: 1.1rem; }
h2 {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 28px 0 10px;
  color: var(--muted);
}

.muted { color: var(--muted); }
.small { font-size: 0.8rem; }
.wrap { overflow-wrap: anywhere; display: block; margin-bottom: 10px; }
.scroll { overflow-x: auto; }

.top {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 1;
}

.brand { font-weight: 700; letter-spacing: 0.06em; text-decoration: none; white-space: nowrap; }
.version { display: none; color: var(--muted); font-size: 0.75rem; }
.nav { display: flex; gap: 12px; margin-left: auto; font-size: 0.85rem; }
.icon-button { border: 0; background: none; padding: 6px 8px; min-height: 0; margin-left: auto; }
.nav + .icon-button { margin-left: 0; }

main { padding: 14px 16px 48px; max-width: 760px; margin: 0 auto; }
.narrow { max-width: 360px; margin: 32px auto; }

.bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.row { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }

button {
  font: inherit;
  min-height: 40px;
  padding: 6px 14px;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--fg);
  border-radius: 2px;
  cursor: pointer;
}
button.primary { background: var(--fg); color: var(--bg); }
button:disabled { opacity: 0.5; cursor: progress; }

label { display: block; margin: 14px 0 4px; font-size: 0.85rem; }
label.check { display: flex; align-items: center; gap: 8px; margin: 8px 0; }

input[type="text"], input[type="email"], input[type="url"], input[type="number"] {
  font: inherit;
  /* 16px stops iOS zooming the page when a field takes focus. */
  font-size: 16px;
  width: 100%;
  padding: 8px;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--muted);
  border-radius: 2px;
}
input[type="checkbox"], input[type="radio"] { accent-color: var(--fg); width: 18px; height: 18px; margin: 0; }

fieldset { border: 0; padding: 0; margin: 16px 0 0; }
legend { font-size: 0.85rem; padding: 0; }

form > button, #passkey-login { width: 100%; margin-top: 14px; }

.notice, .warning {
  border: 1px solid var(--fg);
  padding: 8px 10px;
  margin: 10px 0;
  font-weight: 700;
  font-size: 0.85rem;
}

.panel { border: 1px solid var(--line); padding: 4px 12px 12px; margin: 14px 0; }
.panel h2 { margin-top: 10px; }

.monitors { list-style: none; padding: 0; margin: 12px 0 0; border-top: 1px solid var(--line); }
.monitors li { border-bottom: 1px solid var(--line); }

.monitor {
  display: grid;
  grid-template-columns: 1.4em minmax(0, 1fr) auto;
  grid-template-areas: "icon name state" "icon spark metric";
  column-gap: 8px;
  align-items: center;
  padding: 10px 8px;
  min-height: 56px;
  text-decoration: none;
}
.monitor:hover { background: var(--panel); }
.monitor .icon { grid-area: icon; }
.monitor .name { grid-area: name; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.monitor .state { grid-area: state; text-align: right; white-space: nowrap; }
.monitor .spark { grid-area: spark; color: var(--muted); height: 18px; }
.monitor .metric { grid-area: metric; text-align: right; color: var(--muted); font-size: 0.8rem; white-space: nowrap; }
.monitor .spark svg { display: block; width: 100%; max-width: 160px; height: 18px; }

.monitor.is-down { background: var(--fg); color: var(--bg); font-weight: 700; }
.monitor.is-down:hover { background: var(--fg); }
.monitor.is-down .metric, .monitor.is-down .spark { color: var(--bg); }
.monitor.is-paused, .monitor.is-pending { color: var(--muted); }

.headline { padding: 12px; margin: 12px 0; border: 1px solid var(--line); }
.headline.is-down { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.headline strong { display: block; font-size: 1.1rem; overflow-wrap: anywhere; }

.chart svg { display: block; width: 100%; height: auto; touch-action: pan-y; }
.chart .axis { stroke: var(--line); stroke-width: 1; }
.chart .line { fill: none; stroke: var(--fg); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.chart .fail { fill: var(--fg); }
.chart .cross { stroke: var(--muted); stroke-width: 1; }
.spark-line { fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linejoin: round; stroke-linecap: round; }

table { border-collapse: collapse; width: 100%; font-size: 0.8rem; }
th, td { text-align: left; padding: 6px 10px 6px 0; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { color: var(--muted); font-weight: 400; }
td.wide { white-space: normal; overflow-wrap: anywhere; }

details { margin-top: 18px; }
summary { cursor: pointer; min-height: 32px; }

.facts { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 4px 14px; font-size: 0.85rem; margin: 0; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; overflow-wrap: anywhere; }

.plain { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.plain li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}
.plain .who { overflow-wrap: anywhere; min-width: 0; flex: 1 1 200px; }
.plain .actions { display: flex; gap: 8px; }

/* A modal owns a fixed frame: its content scrolls inside, the frame never resizes (02-coding §2.13). */
.modal {
  padding: 0;
  width: min(520px, calc(100vw - 24px));
  height: min(640px, calc(100dvh - 24px));
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--fg);
}
.modal-small { height: min(240px, calc(100dvh - 24px)); }
.modal::backdrop { background: rgba(0, 0, 0, 0.6); }
.modal-frame { display: flex; flex-direction: column; height: 100%; }
.modal-frame h2 { margin: 0; padding: 12px 16px; border-bottom: 1px solid var(--line); color: var(--fg); }
.modal-body { flex: 1 1 auto; overflow-y: auto; padding: 4px 16px 16px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; padding: 10px 16px; border-top: 1px solid var(--line); }

@media (min-width: 640px) {
  .version { display: inline; }
  .monitor {
    grid-template-columns: 1.4em minmax(0, 1fr) 150px 120px 90px;
    grid-template-areas: "icon name spark metric state";
    min-height: 44px;
  }
}