:root {
  --bg: #fbfaf7;
  --bg-alt: #f1f5f3;
  --ink: #14211f;
  --muted: #4d5f5b;
  --line: #d9e2df;
  --brand: #0f766e;
  --brand-dark: #0b5a54;
  --brand-soft: #d9efec;
  --warn: #8a4b08;
  --on-brand: #ffffff;
  --final-bg: #0b5a54;
  --card: #ffffff;
  --shadow: 0 1px 2px rgba(20, 33, 31, .06), 0 8px 24px rgba(20, 33, 31, .06);
  --radius: 14px;
  --serif: Georgia, "Times New Roman", "Noto Serif", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e1715;
    --bg-alt: #13201d;
    --ink: #e8f0ee;
    --muted: #a4b6b2;
    --line: #26372f;
    --brand: #2dd4bf;
    --brand-dark: #5eead4;
    --brand-soft: #123530;
    --warn: #f0b36a;
    --on-brand: #04201d;
    --final-bg: #0b3b37;
    --card: #172622;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .3);
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.55 var(--sans); }
.wrap { width: 100%; max-width: 1040px; margin: 0 auto; padding: 0 16px; }

h1, h2, h3 { font-family: var(--serif); line-height: 1.18; margin: 0 0 .6em; letter-spacing: -.01em; }
h1 { font-size: clamp(30px, 8vw, 52px); font-weight: 700; max-width: 18em; }
h2 { font-size: clamp(25px, 5.6vw, 36px); }
h3 { font-size: 21px; }
p { margin: 0 0 1em; }
a { color: var(--brand); }
.small { font-size: 14.5px; color: var(--muted); }
.lead { font-size: clamp(18px, 4.6vw, 21px); color: var(--muted); max-width: 40em; }
.lead-sm { color: var(--muted); max-width: 40em; }
.big { font-family: var(--serif); font-size: clamp(21px, 5vw, 28px); line-height: 1.3; margin: 0 0 .8em; }

.top { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.top-in { display: flex; align-items: center; justify-content: space-between; height: 56px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 700; font-family: var(--serif); font-size: 19px; }

.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border-radius: 12px; font: 600 16px var(--sans); text-decoration: none; border: 2px solid transparent; cursor: pointer; text-align: center; }
.btn[hidden] { display: none; }
.btn-primary { background: var(--brand); color: var(--on-brand); }
.btn-primary:hover { background: var(--brand-dark); }
.btn-ghost { border-color: var(--brand); color: var(--brand); background: transparent; }
.btn-ghost:hover { background: var(--brand-soft); }
.btn-small { min-height: 44px; padding: 0 16px; font-size: 14.5px; background: var(--brand-soft); color: var(--brand-dark); }
.btn:focus-visible, summary:focus-visible, input:focus-visible { outline: 3px solid color-mix(in srgb, var(--brand) 55%, transparent); outline-offset: 2px; }
.cta-row { display: flex; flex-direction: column; gap: 12px; margin: 26px 0 20px; }
.cta-row.center { align-items: stretch; }

.eyebrow { text-transform: uppercase; letter-spacing: .08em; font-size: 13px; font-weight: 700; color: var(--brand); margin: 0 0 14px; }
.hero { padding: 40px 0 36px; background: radial-gradient(900px 400px at 85% -10%, var(--brand-soft), transparent 70%); }
.trust { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 14.5px; color: var(--muted); }
.trust li::before { content: "✓"; color: var(--brand); font-weight: 700; margin-right: 6px; }

.block { padding: 44px 0; }
.block.alt { background: var(--bg-alt); border-block: 1px solid var(--line); }
.two { display: grid; gap: 32px; }

.pains { list-style: none; padding: 0; margin: 0 0 8px; display: grid; gap: 10px; }
.pains li { background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--warn); border-radius: 10px; padding: 14px 16px; }
.note-line { color: var(--muted); font-style: italic; margin-top: 14px; }

.steps { counter-reset: s; list-style: none; padding: 0; margin: 0 0 28px; display: grid; gap: 14px; }
.steps li { counter-increment: s; position: relative; padding: 4px 0 4px 52px; }
.steps li::before { content: counter(s); position: absolute; left: 0; top: 0; width: 38px; height: 38px; border-radius: 50%; background: var(--brand); color: var(--on-brand); font: 700 18px/38px var(--serif); text-align: center; }

.chat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px; max-width: 560px; }
.chat-cap { font-size: 13px; color: var(--muted); margin: 0 0 12px; }
.msg { max-width: 88%; padding: 10px 13px; border-radius: 14px; margin: 0 0 10px; font-size: 15.5px; line-height: 1.45; }
.msg.me { margin-left: auto; background: var(--brand); color: var(--on-brand); border-bottom-right-radius: 4px; }
.msg.bot { background: var(--bg-alt); border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.chips i { font-style: normal; font-size: 13.5px; padding: 5px 10px; border-radius: 999px; border: 1px solid var(--brand); color: var(--brand-dark); background: var(--card); }

.ticks, .crosses { list-style: none; padding: 0; margin: 0 0 12px; display: grid; gap: 10px; }
.ticks li, .crosses li { position: relative; padding-left: 28px; }
.ticks li::before { content: "✓"; position: absolute; left: 0; color: var(--brand); font-weight: 800; }
.crosses li::before { content: "✕"; position: absolute; left: 0; color: var(--warn); font-weight: 800; }

.calc { display: grid; gap: 14px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; max-width: 560px; box-shadow: var(--shadow); }
.calc label { display: grid; gap: 6px; font-size: 15px; color: var(--muted); }
.calc input { font: 600 20px var(--sans); padding: 10px 12px; border: 1.5px solid var(--line); border-radius: 10px; background: var(--bg); color: var(--ink); width: 100%; }
.calc-out { margin: 18px 0 8px; display: grid; gap: 6px; }
.calc-out p { margin: 0; }
.calc-out b { font-family: var(--serif); font-size: 22px; color: var(--brand-dark); }

.cards { display: grid; gap: 16px; margin: 22px 0; }
.card { position: relative; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 20px; box-shadow: var(--shadow); }
.card.pick { border: 2px solid var(--brand); }
.badge { position: absolute; top: -12px; left: 18px; background: var(--brand); color: var(--on-brand); font-size: 12.5px; font-weight: 700; padding: 3px 10px; border-radius: 999px; margin: 0; }
.card h3 { margin-bottom: .1em; }
.for { color: var(--muted); font-size: 14.5px; margin-bottom: .7em; }
.price { margin: 0; font-size: 15px; }
.price b { font-family: var(--serif); font-size: 36px; }
.once { color: var(--muted); font-size: 14.5px; margin-bottom: 1em; }
.card ul { margin: 0; padding-left: 18px; display: grid; gap: 6px; font-size: 15.5px; }
.pilot { background: var(--brand-soft); border-radius: var(--radius); padding: 18px 20px; margin-top: 22px; }
.pilot h3 { margin-bottom: .3em; }
.pilot p { margin: 0; }

details { background: var(--card); border: 1px solid var(--line); border-radius: 12px; margin: 0 0 10px; }
summary { cursor: pointer; padding: 15px 16px; font-weight: 600; list-style: none; position: relative; padding-right: 44px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 16px; top: 11px; font-size: 24px; color: var(--brand); transition: transform .2s; }
details[open] summary::after { content: "–"; }
details p { padding: 0 16px 14px; margin: 0; color: var(--muted); }

.final { padding: 52px 0 56px; background: var(--final-bg); color: #fff; }
.final h2 { color: #fff; max-width: 18em; }
.final .lead-sm { color: #cfe8e4; }
.btn-ghost.light { border-color: #fff; color: #fff; }
.btn-ghost.light:hover { background: rgba(255, 255, 255, .12); }
.final .btn-primary { background: #fff; color: var(--final-bg); }
.no-contacts { color: #f2d6a0; font-size: 14.5px; }
.no-contacts[hidden] { display: none; }

.foot { padding: 22px 0 36px; font-size: 13.5px; color: var(--muted); }

@media (min-width: 720px) {
  body { font-size: 18px; }
  .wrap { padding: 0 24px; }
  .hero { padding: 72px 0 64px; }
  .block { padding: 68px 0; }
  .cta-row { flex-direction: row; }
  .two { grid-template-columns: 1fr 1fr; gap: 48px; }
  .cards { grid-template-columns: repeat(3, 1fr); }
  .calc { grid-template-columns: 1fr 1fr 1fr; max-width: none; }
  .chat { padding: 22px; }
}
@media print { .top, .cta-row, .final { display: none; } }

/* якоря не прячутся под липкой шапкой */
[id] { scroll-margin-top: 68px; }