:root {
  color-scheme: light;
  --ink: oklch(25% .025 155);
  --muted: oklch(46% .02 155);
  --paper: oklch(98% .008 100);
  --green: oklch(39% .09 155);
  --wash: oklch(93% .025 150);
  --line: oklch(85% .018 155);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

main {
  max-width: 800px;
  margin: auto;
  padding: 32px 28px 56px;
}

a { color: var(--green); text-underline-offset: 4px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, input:focus-visible {
  outline: 3px solid var(--green);
  outline-offset: 5px;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 64px;
  color: var(--muted);
  font-size: 14px;
}

.brand { font-weight: 700; text-decoration: none; }
.eyebrow { color: var(--green); font-size: 14px; }
h1 {
  max-width: 17ch;
  margin: 16px 0 24px;
  font-size: clamp(36px, 6vw, 58px);
  line-height: 1.08;
  letter-spacing: -.035em;
}

.lead { max-width: 48ch; font-size: 21px; line-height: 1.5; }
.hint { margin: 28px 0 0; color: var(--muted); font-size: 14px; }
.checklist { margin: 18px 0 0; padding: 0; list-style: none; }
.checklist li {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 27px 0 29px;
  border-bottom: 1px solid var(--line);
}

.checklist input {
  flex: 0 0 auto;
  width: 23px;
  height: 23px;
  margin: 3px 0 0;
  accent-color: var(--green);
  cursor: pointer;
}

.checklist label { min-width: 0; cursor: pointer; }
.checklist strong { display: block; font-size: 20px; line-height: 1.35; }
.step-number { color: var(--green); }
.step-text { display: block; margin-top: 10px; max-width: 65ch; }
.checklist input:checked + label .step-number { text-decoration: line-through; }
.takeaway { max-width: 65ch; margin: 30px 0 52px; color: var(--muted); }

.contact { padding: 34px 36px 38px; background: var(--wash); border-radius: 12px; }
.contact h2 { margin: 0 0 24px; font-size: clamp(25px, 3.8vw, 31px); font-weight: 400; line-height: 1.35; letter-spacing: -.018em; }
.contact p { max-width: 65ch; }
.signature { margin: 28px 0; font-size: 23px; font-weight: 700; line-height: 1.5; }
.contact-button {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 4px 18px;
  min-height: 52px;
  margin-top: 12px;
  padding: 13px 20px;
  border-radius: 6px;
  background: var(--green);
  color: var(--paper);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  text-decoration: none;
}

.contact-button:hover { background: oklch(32% .075 155); }
.contact-button > span { white-space: nowrap; }
footer { margin-top: 40px; color: var(--muted); font-size: 14px; }
footer p { margin-bottom: 4px; }

@media (max-width: 480px) {
  main { padding: 24px 20px 40px; }
  .page-header { align-items: flex-start; margin-bottom: 42px; font-size: 12px; }
  .page-header > span { text-align: right; }
  .lead { font-size: 19px; }
  .checklist li { gap: 12px; padding: 24px 0; }
  .checklist strong { font-size: 19px; }
  .contact { margin: 0 -6px; padding: 27px 22px 30px; }
  .contact-button { width: 100%; }
}

@media print {
  body { font-size: 11pt; }
  main { max-width: none; padding: 0; }
  .page-header { margin-bottom: 24px; }
  h1 { font-size: 30pt; }
  .checklist li { break-inside: avoid; padding: 14px 0; }
  .contact { break-inside: avoid; background: transparent; padding: 0; }
  .contact-button { padding: 0; background: transparent; color: var(--green); }
  .contact-button::after { content: " (t.me/stim7)"; }
  footer { display: none; }
}