/* Light and dark both defined, dark by prefers-color-scheme rather than a
   toggle. A start page is opened dozens of times a day and never configured;
   following the OS is the setting most likely to already be right. */
:root {
  --bg: #fbfbfa;
  --surface: #ffffff;
  --border: #e3e1dd;
  --text: #1f1e1c;
  --muted: #6f6c67;
  --accent: #2f6f4f;
  --danger: #a13b2d;
  --radius: 8px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17171a;
    --surface: #1f1f23;
    --border: #33333a;
    --text: #eceaE6;
    --muted: #9a968e;
    --accent: #6fc79a;
    --danger: #e0806f;
  }
}

* { box-sizing: border-box; }

/* The `hidden` attribute is only `display: none` in the browser's default
   stylesheet, and ANY author rule that sets `display` outranks it. Both
   `#add-form` and `#banner` below set one, so without this they render on
   load despite being marked hidden -- and the JS toggling `.hidden` silently
   does nothing. Every server-side test still passed; only opening the page
   showed it. */
[hidden] { display: none !important; }

body {
  margin: 0;
  padding: 1.5rem clamp(1rem, 4vw, 3rem) 3rem;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
}

header {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1.5rem;
}

h1 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}

input, button {
  font: inherit;
  color: inherit;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.4rem 0.7rem;
  background: var(--surface);
}

input:focus-visible, button:focus-visible, a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

#search { flex: 1 1 14rem; min-width: 0; }

button { cursor: pointer; }
button:hover { border-color: var(--muted); }

#add-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

#add-form input { flex: 1 1 10rem; min-width: 0; }
#add-form button[type="submit"] { border-color: var(--accent); color: var(--accent); }

#banner {
  margin-bottom: 1.25rem;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--danger);
  border-left-width: 3px;
  border-radius: var(--radius);
  color: var(--danger);
  background: var(--surface);
}

#banner code {
  font-family: ui-monospace, "Cascadia Code", Menlo, monospace;
  font-size: 0.85em;
}

section { margin-bottom: 2rem; }

h2 {
  margin: 0 0 0.6rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--muted);
}

ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

li:hover { border-color: var(--muted); }

/* Liveness dot (S-02). Colour is never the only signal -- every dot carries a
   title with the status word, the HTTP code and the latency, because roughly
   1 in 12 men cannot reliably separate the red from the green. */
.dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--muted);
}

.dot.up      { background: var(--accent); }
.dot.down    { background: var(--danger); }
.dot.blocked { background: var(--muted); box-shadow: 0 0 0 2px var(--danger); }
.dot.unknown { background: transparent; box-shadow: inset 0 0 0 1px var(--border); }

.icon { flex: none; width: 1.4rem; text-align: center; font-size: 1.05rem; }

li a {
  flex: 1;
  min-width: 0;
  color: inherit;
  text-decoration: none;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

li a:hover { color: var(--accent); }

.host {
  display: block;
  font-size: 0.76rem;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Delete stays invisible until the row is hovered or the button itself is
   focused, so keyboard users can still reach it. Always-visible delete
   buttons on a page you click all day are a mistake waiting to happen. */
.del {
  flex: none;
  padding: 0.1rem 0.4rem;
  border-color: transparent;
  background: none;
  color: var(--muted);
  opacity: 0;
}

li:hover .del, .del:focus-visible { opacity: 1; }
.del:hover { color: var(--danger); }

.empty { color: var(--muted); }

footer {
  display: flex;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--muted);
}

footer a { color: inherit; }