:root {
  color-scheme: light dark;
  --fg: #16181d;
  --muted: #5b616e;
  --bg: #fbfbf9;
  --line: #d9dbe0;
  --accent: #1f6f50;
  --err: #a8321f;
}
@media (prefers-color-scheme: dark) {
  :root { --fg: #e8e9ec; --muted: #a0a5b0; --bg: #121417; --line: #2c3038; --accent: #5fc79a; --err: #f08a74; }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 40rem; margin: 0 auto; padding: 3rem 1.25rem 4rem; }
.brand { font: 600 1rem ui-monospace, SFMono-Regular, Menlo, monospace; color: var(--accent); margin: 0 0 1.5rem; }
h1 { font-size: clamp(1.8rem, 5vw, 2.4rem); line-height: 1.2; margin: 0 0 1.5rem; letter-spacing: -0.01em; }
code { font: 0.92em ui-monospace, SFMono-Regular, Menlo, monospace; background: color-mix(in srgb, var(--line) 50%, transparent); padding: 0.05em 0.3em; border-radius: 4px; }
.features { padding-left: 1.2rem; }
.features li { margin-bottom: 0.6rem; }
form { margin: 2rem 0; padding: 1.5rem; border: 1px solid var(--line); border-radius: 10px; display: grid; gap: 0.9rem; }
label { font-weight: 600; }
input[type=email] { width: 100%; padding: 0.65rem 0.75rem; font: inherit; color: inherit; background: transparent; border: 1px solid var(--line); border-radius: 6px; }
input[type=email]:focus-visible, input[type=checkbox]:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
fieldset { border: 0; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 0.4rem 1.2rem; }
legend { font-weight: 600; margin-bottom: 0.4rem; padding: 0; }
.check { font-weight: 400; display: inline-flex; gap: 0.45rem; align-items: baseline; }
button { justify-self: start; padding: 0.7rem 1.3rem; font: 600 1rem system-ui, sans-serif; color: #fff; background: var(--accent); border: 0; border-radius: 6px; cursor: pointer; }
@media (prefers-color-scheme: dark) { button { color: #0d1a14; } }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.notice { padding: 0.8rem 1rem; border-radius: 6px; border: 1px solid currentColor; }
.notice.ok { color: var(--accent); margin: 2rem 0; }
.notice.err { color: var(--err); }
footer { color: var(--muted); font-size: 0.92rem; border-top: 1px solid var(--line); margin-top: 2.5rem; padding-top: 1rem; }
footer p { margin: 0.3rem 0; }
footer a { color: inherit; }