:root {
  --ink: #0f1b2d;
  --paper: #fbfaf7;
  --card: #ffffff;
  --muted: #55627a;
  --line: #d9dde5;
  --accent: #0b6e69;
  --accent-ink: #ffffff;
  --warn: #9a3b00;
  --focus: #1a5fd0;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eef2f8;
    --paper: #0f1b2d;
    --card: #17263c;
    --muted: #aab6c8;
    --line: #2b3b54;
    --accent: #3fc2b8;
    --accent-ink: #072725;
    --warn: #ffb27a;
    --focus: #8ab4ff;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 1.0625rem/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.top, main, footer { max-width: 40rem; margin: 0 auto; padding: 0 1rem; }
.top { padding-top: 1rem; padding-bottom: .5rem; }
.brand { font-weight: 700; letter-spacing: .02em; color: var(--ink); text-decoration: none; }
h1 { font-size: 2.1rem; line-height: 1.15; margin: 1rem 0 .5rem; }
h2 { font-size: 1.4rem; line-height: 1.25; margin: 2rem 0 .5rem; }
h3 { font-size: 1.1rem; margin: 1.5rem 0 .25rem; }
p { margin: .5rem 0; }
.line { font-weight: 600; color: var(--accent); font-size: 1.15rem; }
.small { font-size: .9rem; color: var(--muted); }
.hero { padding-top: .5rem; }
.proof ul { list-style: none; padding: 0; margin: 1.5rem 0; display: grid; gap: .75rem; }
.proof li { background: var(--card); border: 1px solid var(--line); border-radius: .75rem; padding: .85rem 1rem; }
.proof small { display: block; color: var(--muted); margin-top: .25rem; }
.steps ol { padding-left: 1.25rem; margin: .5rem 0; }
.steps li { margin: .35rem 0; }
label { display: block; font-weight: 600; margin: 1rem 0 .25rem; }
input[type="text"], select {
  width: 100%; min-height: 2.9rem; padding: .6rem .75rem; font: inherit; color: var(--ink);
  background: var(--card); border: 1px solid var(--line); border-radius: .6rem;
}
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
button { font: inherit; min-height: 2.9rem; padding: .6rem 1.1rem; border-radius: .6rem; cursor: pointer; }
button.primary { background: var(--accent); color: var(--accent-ink); border: 0; font-weight: 700; margin-top: 1.25rem; width: 100%; }
button.secondary, button.copy { background: var(--card); color: var(--ink); border: 1px solid var(--line); }
#kit-form button.secondary { margin-top: 1.25rem; width: 100%; }
button[disabled] { opacity: .6; cursor: progress; }
.err { color: var(--warn); font-size: .95rem; min-height: 0; margin: .25rem 0 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: .75rem; padding: 1rem; margin: 1rem 0; }
.card h3 { margin: 0 0 .25rem; }
.card .when, .card .note { color: var(--muted); font-size: .92rem; margin: .15rem 0; }
.sms { white-space: pre-wrap; word-break: break-word; background: var(--paper); border: 1px dashed var(--line); border-radius: .5rem; padding: .7rem; margin: .6rem 0; }
.meta { font-size: .88rem; color: var(--muted); margin: .25rem 0 .5rem; }
.meta.bad { color: var(--warn); font-weight: 600; }
.callout { background: var(--card); border-left: 4px solid var(--accent); padding: .7rem 1rem; font-weight: 600; }
.next { background: var(--card); border: 1px solid var(--line); border-radius: .75rem; padding: 1rem; margin: 2rem 0 1rem; }
.next h2 { margin-top: 0; }
.consent { display: flex; gap: .6rem; align-items: flex-start; margin-top: 1rem; }
.consent input { width: 1.4rem; height: 1.4rem; margin-top: .2rem; flex: none; }
.consent label { margin: 0; font-weight: 400; }
.trap { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.thanks { background: var(--card); border-left: 4px solid var(--accent); padding: .8rem 1rem; font-weight: 600; }
footer { padding-top: 2rem; padding-bottom: 3rem; color: var(--muted); font-size: .9rem; }
a { color: var(--accent); }
.legal { padding-bottom: 3rem; }
.legal h2 { font-size: 1.15rem; }