/* ==========================================================================
   Дрова СПб — дизайн-система
   Mobile-first, лёгкий, без фреймворков. Приоритет: быстрый первый экран,
   высокий контраст CTA, читаемость на телефоне.
   ========================================================================== */

:root{
  /* Палитра: тёплое дерево + огонь-акцент + надёжный тёмный */
  --wood-900:#2a1d12;       /* почти чёрно-коричневый — текст/шапка */
  --wood-700:#5a3d24;
  --wood-500:#8a5a32;
  --wood-300:#c89b6b;
  --wood-100:#f3e7d6;       /* фон-крафт */
  --cream:#faf5 ec;
  --fire:#e8541e;           /* огненный CTA */
  --fire-dark:#c63f0d;
  --green:#2e7d32;          /* «в наличии», доверие */
  --green-bg:#e6f3e7;
  --ink:#241a12;            /* основной текст */
  --muted:#6b5a48;          /* вторичный текст */
  --line:#e3d6c4;           /* границы */
  --white:#ffffff;
  --shadow:0 6px 24px rgba(42,29,18,.12);
  --shadow-sm:0 2px 8px rgba(42,29,18,.08);
  --radius:14px;
  --radius-sm:10px;
  --maxw:1180px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PT Sans",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth }
body{
  margin:0;font-family:var(--font);color:var(--ink);
  background:var(--cream);line-height:1.55;font-size:17px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--fire-dark);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.2;color:var(--wood-900);margin:0 0 .5em;font-weight:800;letter-spacing:-.01em;overflow-wrap:break-word}
h1{font-size:clamp(26px,5.5vw,44px)}
h2{font-size:clamp(22px,4vw,32px);margin-top:0}
h3{font-size:clamp(18px,2.6vw,21px)}
p{margin:0 0 1em}
.container{max-width:var(--maxw);margin:0 auto;padding:0 16px}
.muted{color:var(--muted)}
.center{text-align:center}

/* ---------- Кнопки ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-weight:700;font-size:17px;padding:14px 22px;border-radius:var(--radius-sm);
  border:0;cursor:pointer;transition:.15s transform,.15s box-shadow,.15s background;
  text-decoration:none;white-space:nowrap;line-height:1;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-fire{background:var(--fire);color:#fff;box-shadow:0 4px 14px rgba(232,84,30,.35)}
.btn-fire:hover{background:var(--fire-dark);color:#fff}
.btn-wa{background:#25D366;color:#fff}
.btn-wa:hover{background:#1da851;color:#fff}
.btn-ghost{background:#fff;color:var(--wood-900);border:1.5px solid var(--line)}
.btn-ghost:hover{border-color:var(--wood-300);color:var(--wood-900)}
.btn-lg{padding:17px 28px;font-size:18px}
.btn-block{width:100%}

/* ---------- Шапка ---------- */
.header{background:var(--white);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.header__row{display:flex;align-items:center;gap:16px;min-height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--wood-900)}
.logo:hover{text-decoration:none}
.logo__mark{width:34px;height:34px;flex:0 0 34px}
.logo__sub{font-size:11px;color:var(--muted);font-weight:600;display:block;line-height:1}
.header__spacer{flex:1}
.header__phone{font-weight:800;font-size:19px;color:var(--wood-900);white-space:nowrap}
.header__phone:hover{color:var(--fire-dark);text-decoration:none}
.header__hours{font-size:12px;color:var(--muted);text-align:right}
.header__cta{display:flex;gap:8px;align-items:center}
.nav{background:var(--wood-900)}
.nav__row{display:flex;flex-wrap:wrap;gap:2px}
.nav a{color:#f3e7d6;padding:12px 14px;font-size:15px;font-weight:600;border-radius:8px}
.nav a:hover{background:rgba(255,255,255,.1);text-decoration:none}
.burger{display:none;background:none;border:0;font-size:26px;color:var(--wood-900);cursor:pointer;padding:4px 8px}

/* ---------- Hero ---------- */
.hero{
  background:linear-gradient(180deg,#fff 0%,var(--wood-100) 100%);
  padding:36px 0 28px;
}
.hero__grid{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:center}
.hero h1{margin-bottom:.35em}
.hero__lead{font-size:19px;color:var(--wood-700);margin-bottom:18px}
.hero__usp{list-style:none;padding:0;margin:0 0 22px;display:grid;gap:9px}
.hero__usp li{display:flex;gap:10px;align-items:flex-start;font-weight:600}
.hero__usp li::before{content:"✓";color:var(--green);font-weight:900;flex:0 0 auto}
.hero__cta{display:flex;gap:12px;flex-wrap:wrap}
.hero__price-badge{
  display:inline-block;background:var(--green-bg);color:var(--green);
  font-weight:800;padding:6px 12px;border-radius:8px;font-size:15px;margin-bottom:14px
}
.hero__media{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);background:var(--wood-300);min-height:260px}

/* ---------- Калькулятор ---------- */
.calc{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow-sm)}
.calc h3{margin-bottom:14px}
.calc__field{margin-bottom:14px}
.calc__field label{display:block;font-weight:700;font-size:14px;margin-bottom:6px;color:var(--wood-700)}
.calc select,.calc input{
  width:100%;padding:12px;border:1.5px solid var(--line);border-radius:10px;font-size:16px;
  font-family:inherit;background:#fff;color:var(--ink)
}
.calc__result{
  background:var(--wood-100);border-radius:10px;padding:14px;margin:14px 0;text-align:center
}
.calc__result b{font-size:28px;color:var(--fire-dark)}
.calc__row{display:grid;grid-template-columns:1fr 1fr;gap:12px}

/* ---------- Секции / блоки ---------- */
.section{padding:44px 0}
.section--alt{background:var(--white)}
.section__head{text-align:center;max-width:720px;margin:0 auto 28px}
.section__head p{color:var(--muted);font-size:18px}

.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:18px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow-sm);transition:.15s transform,.15s box-shadow;display:flex;flex-direction:column
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);text-decoration:none}
.card__img{aspect-ratio:4/3;background:var(--wood-300);width:100%;object-fit:cover}
.card__body{padding:14px;display:flex;flex-direction:column;flex:1}
.card__title{font-weight:800;font-size:18px;color:var(--wood-900);margin-bottom:4px}
.card__meta{font-size:13px;color:var(--muted);margin-bottom:10px}
.card__price{margin-top:auto;font-weight:800;font-size:20px;color:var(--wood-900)}
.card__price span{font-size:13px;color:var(--muted);font-weight:600}
.badge{display:inline-block;font-size:12px;font-weight:700;padding:3px 9px;border-radius:6px}
.badge--stock{background:var(--green-bg);color:var(--green)}
.badge--hit{background:#fdebd0;color:#b9770e}

/* ---------- Карточки «Подобрать под задачу» ---------- */
.usegrid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.usecard{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;
  display:flex;flex-direction:column;box-shadow:var(--shadow-sm);
  transition:.15s transform,.15s box-shadow,.15s border-color;text-decoration:none
}
.usecard:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--wood-300);text-decoration:none}
.usecard__ico{
  width:54px;height:54px;border-radius:15px;background:var(--wood-100);
  display:grid;place-items:center;font-size:27px;margin-bottom:16px;flex:0 0 auto
}
.usecard__title{font-weight:800;font-size:20px;color:var(--wood-900);margin-bottom:9px;line-height:1.25}
.usecard__text{color:var(--muted);font-size:15px;margin:0 0 18px;flex:1 1 auto}
.usecard__link{font-weight:700;color:var(--fire-dark);font-size:15px}
.usecard:hover .usecard__link{color:var(--fire)}

/* ---------- Карточки «Почему мы» ---------- */
.whygrid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.whycard{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 22px;
  box-shadow:var(--shadow-sm);transition:.15s transform,.15s box-shadow
}
.whycard:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.whycard__ico{
  width:50px;height:50px;border-radius:14px;
  background:linear-gradient(135deg,#fff1e0,#ffe0c2);
  display:grid;place-items:center;font-size:25px;margin-bottom:14px
}
.whycard h3{margin:0 0 7px;font-size:18px}
.whycard p{margin:0;color:var(--muted);font-size:15px}

.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}
.feature{display:flex;gap:14px;align-items:flex-start}
.feature__ico{font-size:30px;flex:0 0 auto;line-height:1}
.feature h3{margin-bottom:4px;font-size:18px}
.feature p{margin:0;color:var(--muted);font-size:15px}

/* ---------- Таблица цен ---------- */
.pricetable{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);font-size:16px}
.pricetable th,.pricetable td{padding:14px;text-align:left;border-bottom:1px solid var(--line)}
.pricetable th{background:var(--wood-900);color:#f3e7d6;font-weight:700}
.pricetable tr:last-child td{border-bottom:0}
.pricetable td:last-child{font-weight:800;color:var(--wood-900);white-space:nowrap}
.pricetable tr:hover td{background:var(--wood-100)}

/* ---------- FAQ ---------- */
.faq__item{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);margin-bottom:10px;overflow:hidden}
.faq__q{width:100%;text-align:left;background:none;border:0;padding:16px 18px;font-size:17px;font-weight:700;color:var(--wood-900);cursor:pointer;display:flex;justify-content:space-between;gap:12px;align-items:center;font-family:inherit}
.faq__q::after{content:"+";font-size:24px;color:var(--fire);flex:0 0 auto;transition:.2s}
.faq__item.open .faq__q::after{transform:rotate(45deg)}
.faq__a{padding:0 18px;max-height:0;overflow:hidden;transition:.25s;color:var(--muted)}
.faq__item.open .faq__a{padding:0 18px 16px;max-height:600px}

/* ---------- Доверие / отзывы ---------- */
.trust{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px;text-align:center}
.trust__num{font-size:34px;font-weight:900;color:var(--fire-dark);line-height:1}
.trust__lbl{font-size:14px;color:var(--muted)}
.reviews{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px}
.review{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow-sm)}
.review__head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.review__name{font-weight:800;color:var(--wood-900)}
.review__stars{color:#f5b301}
.review__date{font-size:13px;color:var(--muted)}

/* ---------- Форма заявки ---------- */
.lead{background:var(--wood-900);color:#fff;border-radius:var(--radius);padding:28px}
.lead h2{color:#fff}
.lead__grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.lead input{width:100%;padding:14px;border:0;border-radius:10px;font-size:16px;font-family:inherit}
.lead .btn{margin-top:4px}
.lead__note{font-size:13px;color:rgba(255,255,255,.7);margin:10px 0 0}

/* ---------- Хлебные крошки ---------- */
.crumbs{font-size:14px;color:var(--muted);padding:14px 0}
.crumbs a{color:var(--muted)}
.crumbs span{color:var(--wood-900);font-weight:600}

/* ---------- Подвал ---------- */
.footer{background:var(--wood-900);color:#cdbba6;padding:36px 0 24px;font-size:15px}
.footer a{color:#f3e7d6}
.footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:24px;margin-bottom:24px}
.footer h4{color:#fff;font-size:16px;margin:0 0 12px}
.footer ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.footer__bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:16px;font-size:13px;color:#9c8a73;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

/* ---------- Плавающая мобильная панель ---------- */
.mobilebar{display:none}

/* ---------- Адаптив ---------- */
@media(max-width:880px){
  .hero__grid{grid-template-columns:1fr;gap:22px}
  .footer__grid{grid-template-columns:1fr 1fr}
  .lead__grid{grid-template-columns:1fr}
  .whygrid{grid-template-columns:1fr 1fr}
}
@media(max-width:720px){
  .usegrid{grid-template-columns:1fr}
  body{font-size:16px;padding-bottom:64px}
  .header__cta,.header__hours,.logo__sub{display:none}
  .header__row{gap:8px}
  .header__phone{font-size:15px}
  .logo{font-size:16px}
  .logo__mark{width:30px;height:30px;flex-basis:30px}
  .burger{display:block}
  .nav{display:none}
  .nav.open{display:block}
  .nav__row{flex-direction:column}
  .calc__row{grid-template-columns:1fr}
  .footer__grid{grid-template-columns:1fr}
  /* Плавающая панель: звонок + WhatsApp всегда на экране */
  .mobilebar{
    display:flex;position:fixed;bottom:0;left:0;right:0;z-index:60;
    background:#fff;border-top:1px solid var(--line);padding:8px;gap:8px;
    box-shadow:0 -4px 16px rgba(0,0,0,.1)
  }
  .mobilebar .btn{flex:1;padding:13px;font-size:16px}
}
@media(max-width:520px){
  .whygrid{grid-template-columns:1fr}
}