/* Shared styles for every page of poolcontrol.io. Kept in a file rather than
   inline so pages can share it under a style-src 'self' CSP. */
:root {
  --bg: #f6f8fa;
  --card: #ffffff;
  --fg: #1f2328;
  --muted: #59636e;
  --line: #d8dee4;
  --accent: #1565c0;
  --accent-fg: #ffffff;
  --accent-soft: #e8f1fb;
  --warn-bg: #fff8e5;
  --warn-line: #e8d8a8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --card: #151b23;
    --fg: #e6edf3;
    --muted: #9198a1;
    --line: #2f3742;
    --accent: #4a9eff;
    --accent-fg: #06121f;
    --accent-soft: #12243a;
    --warn-bg: #1f1a0b;
    --warn-line: #4a3c15;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  padding: 0 1rem 4rem;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}
main { max-width: 46rem; margin: 0 auto; }

/* --- Site navigation --------------------------------------------------- */
.site-nav {
  max-width: 46rem; margin: 0 auto 2rem;
  display: flex; flex-wrap: wrap; align-items: center;
  gap: .5rem 1.25rem; padding: 1rem 0;
  border-bottom: 1px solid var(--line);
  font-size: .95rem;
}
.site-nav .brand {
  display: flex; align-items: center; gap: .45rem;
  font-weight: 600; color: var(--fg); text-decoration: none;
  margin-right: auto;
}
.site-nav .brand svg { width: 22px; height: 22px; }
.site-nav a { color: var(--muted); text-decoration: none; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--fg); }

/* --- Common content ---------------------------------------------------- */
header { text-align: center; margin-bottom: 2.5rem; }
header svg { width: 64px; height: 64px; }
h1 { font-size: 2rem; margin: .5rem 0 .25rem; letter-spacing: -.02em; line-height: 1.2; }
h2 { font-size: 1.15rem; margin: 0 0 .75rem; letter-spacing: -.01em; }
h3 { font-size: 1rem; margin: 0 0 .25rem; }
p { margin: 0 0 .75rem; }
p:last-child { margin-bottom: 0; }
.tagline { color: var(--muted); margin: 0; }
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 1.5rem; margin-bottom: 1.25rem;
}
ol, ul { padding-left: 1.25rem; margin: 0; }
li + li { margin-top: .4rem; }
a { color: var(--accent); }
code {
  background: var(--bg); border: 1px solid var(--line);
  border-radius: 5px; padding: .1rem .35rem; font-size: .875em;
}
.btn {
  display: inline-block; appearance: none; border: 0; cursor: pointer;
  background: var(--accent); color: var(--accent-fg);
  font: inherit; font-weight: 600; text-decoration: none;
  padding: .8rem 2rem; border-radius: 8px;
}
.btn:hover { filter: brightness(1.08); }
.btn.secondary {
  background: transparent; color: var(--fg);
  border: 1px solid var(--line);
}
.notice {
  display: block; padding: .9rem 1rem; border-radius: 8px;
  background: var(--warn-bg); border: 1px solid var(--warn-line);
  font-size: .92rem; text-align: left;
}
.notice[hidden] { display: none; }
.links { display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; }
.hint { margin: .9rem 0 0; color: var(--muted); font-size: .92rem; }
footer {
  margin-top: 2rem; text-align: center;
  color: var(--muted); font-size: .85rem;
}

/* --- Home page --------------------------------------------------------- */
.hero { margin-bottom: 2rem; }
.hero h1 { font-size: 2.4rem; }
.hero .tagline { font-size: 1.1rem; max-width: 34rem; margin: .5rem auto 0; }
.actions {
  display: flex; flex-wrap: wrap; gap: .75rem;
  justify-content: center; margin-top: 1.5rem;
}
.flow {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: center;
  gap: .5rem; margin: 1rem 0 0; padding: 0; list-style: none;
  font-size: .92rem; text-align: center;
}
.flow li { margin: 0; }
.flow .node {
  display: block; padding: .5rem .8rem; border-radius: 8px;
  background: var(--accent-soft); border: 1px solid var(--line);
  font-weight: 600;
}
.flow .node small { display: block; font-weight: 400; color: var(--muted); }
.flow .arrow { color: var(--muted); }
.features {
  display: grid; gap: 1rem 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
}
.features ul { font-size: .95rem; }
.steps { counter-reset: step; list-style: none; padding: 0; }
.steps li { position: relative; padding-left: 2.25rem; }
.steps li + li { margin-top: 1rem; }
.steps li::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 0; top: .1rem;
  width: 1.6rem; height: 1.6rem; border-radius: 50%;
  background: var(--accent); color: var(--accent-fg);
  font-size: .85rem; font-weight: 600;
  display: flex; align-items: center; justify-content: center;
}
.steps p { color: var(--muted); font-size: .95rem; margin: 0; }

/* --- Installer page ---------------------------------------------------- */
.install { text-align: center; }
.picker {
  display: flex; flex-wrap: wrap; gap: .5rem .75rem;
  align-items: center; justify-content: center;
  margin-bottom: 1.25rem; font-size: .92rem;
}
.picker label { color: var(--muted); }
select {
  font: inherit; color: var(--fg); background-color: var(--bg);
  border: 1px solid var(--line); border-radius: 7px;
  padding: .35rem 2rem .35rem .6rem; cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='%2359636e' d='M4 6l4 4 4-4z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right .5rem center;
  background-size: 1rem;
}
select:disabled { opacity: .6; cursor: default; }
#older { margin: 1.25rem 0 0; }