/* Landing page for the FCast receiver.
   Self-contained: no web fonts, no scripts, nothing fetched from a third party,
   so the page works the same served from GitHub Pages or off a LAN web server. */

:root {
  --bg: #ffffff;
  --bg-soft: #f4f5f7;
  --bg-sunken: #eceef1;
  --fg: #16181d;
  --fg-muted: #5b616e;
  --line: #dcdfe4;
  --accent: #0b6bcb;
  --accent-fg: #ffffff;
  --accent-soft: #e8f1fc;
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12141a;
    --bg-soft: #191c23;
    --bg-sunken: #22262f;
    --fg: #e7e9ee;
    --fg-muted: #9aa2b1;
    --line: #2c313b;
    --accent: #61a6f2;
    --accent-fg: #0d1017;
    --accent-soft: #1a2634;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

h1, h2, h3 { line-height: 1.25; }

a { color: var(--accent); }
a:hover { text-decoration: none; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: var(--bg-sunken);
  border-radius: 5px;
  padding: 0.12em 0.38em;
}

pre {
  background: var(--bg-sunken);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  overflow-x: auto;
}
pre code { background: none; padding: 0; }

/* ---- hero ---------------------------------------------------------------- */

.hero {
  background: var(--bg-soft);
  border-bottom: 1px solid var(--line);
  padding: 3.5rem 1.5rem 3rem;
  text-align: center;
}

.hero .logo {
  border-radius: 16px;
  display: block;
  margin: 0 auto 1.25rem;
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.9rem, 5vw, 2.7rem);
  letter-spacing: -0.02em;
}

.tagline {
  margin: 0 auto;
  max-width: 34rem;
  color: var(--fg-muted);
  font-size: 1.1rem;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin: 1.5rem 0 0;
}
.badges span {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--fg-muted);
  font-size: 0.82rem;
  padding: 0.25rem 0.75rem;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin: 1.75rem 0 0;
}

.button {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--fg);
  display: inline-block;
  font-weight: 600;
  padding: 0.6rem 1.3rem;
  text-decoration: none;
}
.button:hover { border-color: var(--accent); }
.button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-fg);
}
.button.primary:hover { opacity: 0.9; }
.button.download { margin: 0.4rem 0; }

/* Points at the current test build, which carries the work that has not
   reached the add-on repository yet. */
.banner {
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  margin: 2rem auto 0;
  max-width: 36rem;
  padding: 0.85rem 1.2rem;
  text-align: left;
}

/* ---- section nav --------------------------------------------------------- */

.toc {
  border-bottom: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.5rem;
  justify-content: center;
  padding: 0.9rem 1.5rem;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 1;
}
.toc a {
  color: var(--fg-muted);
  font-size: 0.92rem;
  text-decoration: none;
}
.toc a:hover { color: var(--accent); }

/* ---- layout -------------------------------------------------------------- */

main {
  margin: 0 auto;
  max-width: 46rem;
  padding: 0 1.5rem 3rem;
}

section { padding-top: 3rem; }

section > h2 {
  border-bottom: 1px solid var(--line);
  font-size: 1.6rem;
  margin: 0 0 1.25rem;
  padding-bottom: 0.5rem;
}

h3 { font-size: 1.12rem; margin: 2rem 0 0.6rem; }

.pill {
  background: var(--accent-soft);
  border-radius: 999px;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 0.15rem 0.6rem;
  text-transform: uppercase;
  vertical-align: middle;
}

.hint {
  color: var(--fg-muted);
  display: inline-block;
  font-size: 0.9rem;
}

/* ---- feature grid -------------------------------------------------------- */

.features {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  list-style: none;
  margin: 1.75rem 0;
  padding: 0;
}
.features li {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
}
.features h3 { font-size: 1rem; margin: 0 0 0.35rem; }
.features p { color: var(--fg-muted); font-size: 0.94rem; margin: 0; }

/* ---- what's in the test build -------------------------------------------- */

.whatsnew {
  list-style: none;
  margin: 1.25rem 0;
  padding: 0;
}
.whatsnew li {
  border-left: 2px solid var(--accent);
  margin-bottom: 0.9rem;
  padding-left: 1rem;
}
.whatsnew b { color: var(--fg); }

.cta-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1.5rem 0 0.5rem;
}

/* ---- callouts ------------------------------------------------------------ */

.note, .requirements {
  background: var(--bg-soft);
  border-left: 3px solid var(--line);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 0.85rem 1.1rem;
}

.callout {
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 0.4rem 1.25rem;
}
.callout p:first-child { margin-top: 1rem; }

/* ---- numbered install steps ---------------------------------------------- */

.steps {
  counter-reset: step;
  list-style: none;
  margin: 1.25rem 0;
  padding: 0;
}
.steps > li {
  border-left: 1px solid var(--line);
  margin-left: 0.9rem;
  padding: 0 0 1.4rem 1.75rem;
  position: relative;
}
.steps > li:last-child { border-left-color: transparent; padding-bottom: 0; }
.steps > li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: -0.9rem;
  top: -0.15rem;
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-fg);
  font-size: 0.85rem;
  font-weight: 700;
  display: grid;
  place-items: center;
}

/* ---- settings list ------------------------------------------------------- */

.path {
  background: var(--bg-sunken);
  border-radius: var(--radius);
  font-size: 0.95rem;
  padding: 0.6rem 0.9rem;
}

.settings { margin: 1.5rem 0 0; }
.settings dt {
  font-weight: 650;
  margin-top: 1.5rem;
}
.settings dd {
  border-left: 2px solid var(--line);
  color: var(--fg-muted);
  margin: 0.4rem 0 0;
  padding-left: 1rem;
}
.settings dd .hint { margin-top: 0.5rem; }

/* ---- troubleshooting ----------------------------------------------------- */

details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  padding: 0 1.1rem;
}
details[open] { background: var(--bg-soft); padding-bottom: 0.4rem; }
summary {
  cursor: pointer;
  font-weight: 600;
  padding: 0.85rem 0;
}
summary:hover { color: var(--accent); }
details p:first-of-type { margin-top: 0; }

/* ---- footer -------------------------------------------------------------- */

footer {
  border-top: 1px solid var(--line);
  color: var(--fg-muted);
  padding: 2rem 1.5rem 3rem;
  text-align: center;
}
footer p { margin: 0.5rem 0; }
footer .small {
  font-size: 0.86rem;
  margin: 0.75rem auto 0;
  max-width: 38rem;
}

@media (max-width: 30rem) {
  .hero { padding: 2.5rem 1.25rem 2.25rem; }
  .toc { gap: 0.4rem 1rem; }
  .button { flex: 1 1 auto; text-align: center; }
}