:root {
  --green: #7ab929;
  --green-dark: #5f9a17;
  --dark: #1d2329;
  --text: #2b3138;
  --muted: #6b7480;
  --gray: #f3f5f7;
  --border: #e3e7eb;
  --radius: 18px;
  --wa: #25d366;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text);
  line-height: 1.5;
  background: #fff;
}
img { max-width: 100%; display: block; }
a { color: var(--green-dark); }
h1, h2, h3 { color: var(--dark); line-height: 1.2; margin: 0 0 .6em; }
h1 { font-size: clamp(28px, 5vw, 46px); }
h2 { font-size: clamp(24px, 3.5vw, 34px); }
h3 { font-size: 18px; }

.container { max-width: 1140px; margin: 0 auto; padding: 0 20px; }

.header {
  position: sticky; top: 0; z-index: 50;
  background: #fff;
  box-shadow: 0 2px 12px rgba(0,0,0,.06);
}
.header__inner { display: flex; align-items: center; gap: 24px; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.logo__text { display: flex; flex-direction: column; line-height: 1.1; }
.logo__text b { color: var(--green-dark); font-size: 18px; text-transform: uppercase; letter-spacing: .5px; }
.logo__text small { color: var(--muted); font-size: 11px; text-transform: uppercase; }
.nav { display: flex; gap: 22px; margin-left: auto; }
.nav a { color: var(--text); text-decoration: none; font-weight: 500; }
.nav a:hover { color: var(--green-dark); }
.header__actions { display: flex; align-items: center; gap: 10px; }
.header__phone { font-weight: 700; color: var(--dark); text-decoration: none; margin-right: 6px; white-space: nowrap; }
.round-btn {
  width: 46px; height: 46px; border-radius: 50%;
  display: grid; place-items: center;
}
.round-btn svg { width: 24px; height: 24px; }
.round-btn--call { background: #e3f5d0; }
.round-btn--call svg { fill: var(--green-dark); }
.round-btn--wa { background: var(--wa); }
.round-btn--wa svg { fill: #fff; }

.btn {
  display: inline-block;
  padding: 16px 32px;
  border-radius: 12px;
  font-weight: 700; font-size: 17px;
  text-align: center; text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background .2s, transform .1s;
}
.btn:active { transform: scale(.98); }
.btn--primary { background: var(--green); color: #fff; }
.btn--primary:hover { background: var(--green-dark); }
.btn--ghost { border-color: var(--green); color: var(--green-dark); background: #fff; }
.btn--block { display: block; width: 100%; }

.hero { padding: 48px 0 56px; background: linear-gradient(180deg, #f2f8ff 0%, #fff 100%); }
.hero__inner { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: center; }
.hero__lead { font-size: 18px; font-weight: 500; }
.hero__bullets { list-style: none; padding: 0; margin: 20px 0 28px; }
.hero__bullets li { padding-left: 28px; position: relative; margin-bottom: 8px; }
.hero__bullets li::before {
  content: "✓"; position: absolute; left: 0; top: 0;
  color: var(--green-dark); font-weight: 900;
}
.hero__buttons { display: flex; gap: 12px; flex-wrap: wrap; }
.hero__img img { border-radius: var(--radius); width: 100%; height: auto; box-shadow: 0 12px 40px rgba(30,60,90,.12); }

.section { padding: 64px 0; }
.section--gray { background: var(--gray); }
.section__sub { color: var(--muted); margin: -8px 0 28px; max-width: 700px; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  display: flex; flex-direction: column;
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  transition: box-shadow .2s, transform .2s;
}
.card:hover { box-shadow: 0 10px 30px rgba(0,0,0,.08); transform: translateY(-2px); }
.card__icon { font-size: 34px; margin-bottom: 10px; }
.card p { margin: 0; color: var(--muted); flex: 1; }
.card__price { margin-top: 14px; font-weight: 700; color: var(--dark); }
.card__btn, .price-row__btn {
  display: block; text-align: center; text-decoration: none;
  background: #e3f5d0; color: var(--green-dark); font-weight: 700;
  border-radius: 10px; padding: 10px 14px; transition: background .2s;
}
.card__btn { margin-top: 12px; }
.card__btn:hover, .price-row__btn:hover { background: #d2edb5; }

.price-table { background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); }
.price-row {
  display: grid; grid-template-columns: 1fr auto auto; align-items: center;
  gap: 8px 20px; padding: 14px 22px; border-bottom: 1px solid var(--border);
}
.price-row__btn { padding: 8px 16px; font-size: 15px; }
.price-row:last-child { border-bottom: 0; }
.price-row b { white-space: nowrap; color: var(--dark); }
.promo {
  display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 4px 24px;
  margin-top: 20px; padding: 22px 26px;
  border-radius: var(--radius);
  background: #e3f5d0; color: #3a5f0e;
}
.promo__title { font-size: 20px; color: var(--green-dark); }
.promo p { margin: 0; font-weight: 500; grid-column: 1; }
.promo .btn { grid-column: 2; grid-row: 1 / span 2; width: auto; white-space: nowrap; }

.calc {
  max-width: 560px;
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px;
  box-shadow: 0 10px 30px rgba(0,0,0,.05);
}
.calc input[type=range] { width: 100%; accent-color: var(--green); }
.calc output { font-weight: 700; font-size: 20px; color: var(--dark); }
.check { display: flex; align-items: center; gap: 10px; margin: 12px 0; cursor: pointer; }
.check input { width: 20px; height: 20px; accent-color: var(--green); }
.calc__result {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 10px;
  margin: 20px 0; padding: 18px; border-radius: 12px; background: var(--gray);
}
.calc__result b { font-size: 28px; color: var(--green-dark); }
.calc__result small { width: 100%; color: var(--muted); }
.calc__buttons { display: grid; gap: 10px; }

.features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.feature { background: #fff; border-radius: var(--radius); padding: 24px; }
.feature b { display: block; font-size: 28px; color: var(--green-dark); margin-bottom: 6px; }
.feature span { color: var(--muted); }

.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; counter-reset: step; }
.steps li { counter-increment: step; padding: 20px; border: 1px solid var(--border); border-radius: var(--radius); }
.steps li::before {
  content: counter(step);
  display: grid; place-items: center;
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--green); color: #fff; font-weight: 700;
  margin-bottom: 12px;
}
.steps b { display: block; color: var(--dark); margin-bottom: 4px; }
.steps span { color: var(--muted); font-size: 15px; }
.dots { display: none; }

.faq { max-width: 820px; }
.faq details { background: #fff; border-radius: 12px; margin-bottom: 10px; padding: 0 22px; }
.faq summary {
  cursor: pointer; list-style: none;
  padding: 18px 30px 18px 0; position: relative;
  font-weight: 600; color: var(--dark);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 0; top: 50%; transform: translateY(-50%);
  font-size: 24px; color: var(--green-dark); transition: transform .2s;
}
.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq p { margin: 0 0 18px; color: var(--muted); }

.order { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.big-phone { font-size: 28px; font-weight: 800; color: var(--dark); text-decoration: none; }
.order__form {
  background: var(--gray); padding: 28px; border-radius: var(--radius);
}
.field { display: block; margin-bottom: 16px; }
.field span { display: block; font-weight: 600; margin-bottom: 6px; font-size: 15px; }
.field input[type=text], .field input[type=tel], .field textarea {
  width: 100%; padding: 14px 16px;
  border: 1px solid var(--border); border-radius: 10px;
  font: inherit; background: #fff;
}
.field input:focus, .field textarea:focus { outline: 2px solid var(--green); border-color: transparent; }
.order__note { display: block; margin-top: 12px; color: var(--muted); font-size: 13px; }

.contacts { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.contacts__info p { margin: 0 0 12px; }
.contacts__cta { display: grid; gap: 12px; align-self: center; }
.btn--wa { background: var(--wa); color: #fff; }
.btn--wa:hover { background: #1ebe5b; }

.footer { background: var(--dark); color: #b7c0ca; padding: 28px 0; font-size: 14px; }
.footer__inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer a { color: #fff; text-decoration: none; font-weight: 600; }

.tabbar { display: none; }

@media (max-width: 1000px) {
  .nav { display: none; }
  .header__actions { margin-left: auto; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .features { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  body { padding-bottom: 72px; font-size: 15px; }
  h1 { font-size: 26px; }
  h2 { font-size: 24px; }
  .header__inner { height: 64px; }
  .header__phone { display: none; }
  .hero { padding: 20px 0 36px; }
  .hero__inner { grid-template-columns: 1fr; gap: 20px; }
  .hero__img { order: -1; }
  .hero__lead { font-size: 16px; }
  .hero__bullets { margin: 16px 0 22px; }
  .hero__buttons .btn { flex: 1; padding: 15px 12px; white-space: nowrap; }
  .section { padding: 36px 0; }
  .section__sub { font-size: 14px; margin: -6px 0 20px; }

  .cards { grid-template-columns: 1fr 1fr; gap: 12px; }
  .card { padding: 14px; border-radius: 14px; }
  .card:hover { transform: none; }
  .card__icon { font-size: 28px; margin-bottom: 6px; }
  .card h3 { font-size: 15px; margin-bottom: 0; flex: 1; }
  .card p { display: none; }
  .card__price { margin-top: 8px; font-size: 14px; }
  .card__btn { margin-top: 10px; padding: 9px 8px; font-size: 14px; }

  .price-row { grid-template-columns: 1fr auto; gap: 8px 12px; padding: 14px 16px; }
  .price-row__name { grid-column: 1 / -1; }
  .price-row__btn { padding: 8px 18px; font-size: 14px; }

  .promo { grid-template-columns: 1fr; padding: 20px; gap: 8px; }
  .promo p, .promo .btn { grid-column: 1; grid-row: auto; }
  .promo .btn { width: 100%; margin-top: 8px; }

  .features { grid-template-columns: 1fr 1fr; gap: 12px; }
  .feature { padding: 16px; }
  .feature b { font-size: 22px; }
  .feature span { font-size: 14px; }

  .steps {
    display: flex; gap: 12px;
    overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none;
    margin: 0 -20px; padding: 0 20px 4px; scroll-padding: 0 20px;
  }
  .steps::-webkit-scrollbar { display: none; }
  .steps li { flex: 0 0 78%; scroll-snap-align: start; background: #fff; }
  .dots { display: flex; justify-content: center; gap: 8px; margin-top: 16px; }
  .dots button {
    width: 8px; height: 8px; padding: 0; border: 0; border-radius: 4px;
    background: #cfd6dd; cursor: pointer; transition: width .2s, background .2s;
  }
  .dots button.is-active { width: 28px; background: var(--green); }

  .order, .contacts { grid-template-columns: 1fr; gap: 24px; }
  .calc, .order__form { padding: 20px; }
  .big-phone { font-size: 24px; }

  .tabbar {
    display: flex; position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
    background: #f7f8fa; border-top: 1px solid var(--border);
    padding: 6px 0 calc(6px + env(safe-area-inset-bottom));
  }
  .tabbar a {
    flex: 1; display: flex; flex-direction: column; align-items: center; gap: 2px;
    font-size: 12px; color: var(--muted); text-decoration: none;
  }
  .tabbar svg { width: 26px; height: 26px; fill: #8a95a3; transition: fill .2s; }
  .tabbar a.is-active { color: var(--green-dark); }
  .tabbar a.is-active svg { fill: var(--green-dark); }
}