:root {
  --bg: #fff;
  --fg: #1c2330;
  --muted: #5b6577;
  --line: #e3e7ee;
  --accent: #0b5fd6;
  --accent-fg: #fff;
  --surface: #f6f8fb;
  --radius: 10px;
  --max: 64rem;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #2b3648;
    --fg: #f1f4f9;
    --muted: #b9c3d4;
    --line: #435068;
    --accent: #7db2ff;
    --accent-fg: #0f1623;
    --surface: #354258;
  }
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font: 1rem/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--fg);
  background: var(--bg);
}
a { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }

header.site {
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; background: var(--bg); z-index: 10;
}
header.site .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; min-height: 3.75rem; flex-wrap: wrap;
}
.brand { font-weight: 700; letter-spacing: -.01em; color: var(--fg); text-decoration: none; }
nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: .25rem 1.1rem; }
nav a { color: var(--muted); text-decoration: none; font-size: .95rem; padding: .35rem 0; display: inline-block; }
nav a:hover, nav a[aria-current="page"] { color: var(--fg); }
nav a[aria-current="page"] { border-bottom: 2px solid var(--accent); }

main { padding: 3rem 0 4rem; }
.hero { padding: 3rem 0 2rem; }
h1 { font-size: clamp(1.9rem, 4vw + .5rem, 3rem); line-height: 1.15; letter-spacing: -.02em; margin: 0 0 1rem; }
h2 { font-size: 1.35rem; margin: 2.5rem 0 .75rem; letter-spacing: -.01em; }
h3 { font-size: 1.05rem; margin: 0 0 .35rem; }
.lead { font-size: 1.2rem; color: var(--muted); max-width: 40rem; }
p { max-width: 42rem; }

.btn {
  display: inline-block; background: var(--accent); color: var(--accent-fg);
  padding: .7rem 1.25rem; border-radius: var(--radius); text-decoration: none;
  font: inherit; font-weight: 600; border: 0; cursor: pointer;
}
.btn:hover { filter: brightness(1.1); }
.btn[disabled] { opacity: .6; cursor: progress; }
.btn.secondary { background: transparent; color: var(--fg); border: 1px solid var(--line); }
.actions { display: flex; gap: .75rem; flex-wrap: wrap; margin-top: 1.5rem; }

.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); margin-top: 1.5rem; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.25rem; }
.card p { margin: 0; color: var(--muted); font-size: .95rem; }

.shots { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr)); margin-top: 1rem; }
.shots figure { margin: 0; }
.shots img { border: 1px solid var(--line); border-radius: var(--radius); }
.shots figcaption { color: var(--muted); font-size: .9rem; margin-top: .4rem; }

ul.ticks { padding-left: 1.2rem; max-width: 42rem; }
ul.ticks li { margin: .3rem 0; }
.note { background: var(--surface); border-left: 3px solid var(--accent); padding: .75rem 1rem; border-radius: 0 var(--radius) var(--radius) 0; max-width: 42rem; }

form.reg { max-width: 28rem; margin-top: 1.5rem; display: grid; gap: 1rem; }
form.reg label { display: grid; gap: .3rem; font-weight: 600; font-size: .95rem; }
form.reg input {
  font: inherit; padding: .65rem .75rem; border-radius: 8px;
  border: 1px solid var(--line); background: var(--bg); color: var(--fg);
}
form.reg input:focus-visible, .btn:focus-visible, a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.status { min-height: 1.5rem; }
.status.error { color: #d23b3b; }
.result { margin-top: 1.5rem; }
details#install { margin-top: 2.5rem; padding-top: 1.25rem; border-top: 1px solid var(--line); }
details#install summary { cursor: pointer; }
[hidden] { display: none !important; }

footer.site { border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; padding: 1.5rem 0; }