/* Очаг — магазин отопительного оборудования. Графит + медь/огонь. Без внешних ресурсов. */
:root {
  --graphite-950: #151210;
  --graphite-900: #1b1816;
  --graphite-800: #26211e;
  --graphite-700: #3a332f;
  --ember: #ff7a1a;       /* на тёмном */
  --ember-soft: #ffb066;
  --copper: #b34416;      /* на светлом, контраст 5:1 */
  --stone: #efedea;
  --white: #fff;
  --ink: #231f1c;
  --muted: #655e58;
  --line: #ddd8d3;
  --on-dark: #e9e3de;
  --on-dark-muted: #b9b0a8;
  --heat: linear-gradient(90deg, var(--graphite-700) 0%, #8c3410 28%, var(--copper) 52%, var(--ember) 78%, #ffc47a 100%);
  --font-head: Bahnschrift, "Arial Narrow", "Roboto Condensed", "Helvetica Neue", sans-serif;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --wrap: 1180px;
  --gutter: clamp(1rem, 4vw, 2rem);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 5rem; }
body {
  margin: 0;
  font: 1rem/1.6 var(--font-body);
  color: var(--ink);
  background: var(--stone);
  overflow-wrap: break-word;
}
img, svg { max-width: 100%; }
h1, h2, h3 {
  font-family: var(--font-head);
  font-stretch: condensed;
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.005em;
  margin: 0 0 .6em;
  text-wrap: balance;
}
h1 { font-size: clamp(2rem, 5.2vw, 3.25rem); }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.2rem); }
h3 { font-size: 1.3rem; }
p { margin: 0 0 1em; }
a { color: var(--copper); text-underline-offset: .2em; }
a:hover { color: var(--graphite-900); }
address { font-style: normal; }
code { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: .92em; }
:focus-visible { outline: 3px solid var(--copper); outline-offset: 3px; border-radius: 2px; }
.site-header :focus-visible, .hero :focus-visible, .site-footer :focus-visible, .page-head :focus-visible, .address-block :focus-visible {
  outline-color: var(--ember-soft);
}
.wrap { width: min(100% - 2 * var(--gutter), var(--wrap)); margin-inline: auto; }
[hidden] { display: none !important; }

.skip {
  position: absolute; left: .5rem; top: -4rem; z-index: 100;
  background: var(--white); color: var(--ink); padding: .6rem 1rem; border-radius: 4px;
}
.skip:focus { top: .5rem; }

/* ---------- шапка ---------- */
.site-header { position: sticky; top: 0; z-index: 50; background: var(--graphite-900); color: var(--on-dark); border-bottom: 1px solid var(--graphite-700); }
.site-header__bar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 4rem; }
.brand { display: flex; align-items: center; gap: .55rem; text-decoration: none; color: var(--white); min-width: 0; }
.brand:hover { color: var(--white); }
.brand__flame { width: 1.7rem; height: 1.7rem; color: var(--ember); flex: none; }
.brand__name { font: 700 1.75rem/1 var(--font-head); font-stretch: condensed; letter-spacing: .01em; }
.brand__tag { font-size: .8rem; color: var(--on-dark-muted); line-height: 1.15; max-width: 7.5rem; }
.nav { display: flex; gap: .25rem; }
.nav a {
  color: var(--on-dark); text-decoration: none; padding: .55rem .85rem; border-radius: 6px;
  border-bottom: 3px solid transparent; font-weight: 500;
}
.nav a:hover { background: var(--graphite-800); color: var(--white); }
.nav a[aria-current="page"] { color: var(--white); border-bottom-color: var(--ember); border-radius: 6px 6px 0 0; }
.nav-toggle {
  display: none; width: 2.75rem; height: 2.75rem; padding: 0; cursor: pointer;
  background: transparent; border: 1px solid var(--graphite-700); border-radius: 8px; color: var(--white);
}
.nav-toggle__bars, .nav-toggle__bars::before, .nav-toggle__bars::after {
  display: block; width: 1.3rem; height: 2px; background: currentColor; margin-inline: auto; position: relative;
}
.nav-toggle__bars::before, .nav-toggle__bars::after { content: ""; position: absolute; left: 0; }
.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { top: 0; transform: rotate(-45deg); }

@media (max-width: 860px) {
  .js .nav-toggle { display: block; }
  .js .nav {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; gap: 0; padding: .5rem var(--gutter) 1rem;
    background: var(--graphite-900); border-bottom: 1px solid var(--graphite-700);
  }
  .js .nav.is-open { display: flex; }
  .nav a { padding: .8rem .5rem; border-bottom: 1px solid var(--graphite-800); border-radius: 0; }
  .nav a[aria-current="page"] { border-bottom-color: var(--ember); border-radius: 0; }
  .nav:not(.is-open) { flex-wrap: wrap; }
  .site-header__bar { flex-wrap: wrap; padding-block: .4rem; }
}
@media (max-width: 420px) { .brand__tag { display: none; } }

/* ---------- общие блоки ---------- */
.heat-line { height: 6px; background: var(--heat); }
.btn {
  display: inline-block; font: 600 1rem/1.2 var(--font-body); text-align: center; text-decoration: none;
  padding: .9rem 1.4rem; border-radius: 8px; border: 2px solid transparent; cursor: pointer; min-height: 2.75rem;
}
.btn--ember { background: var(--ember); color: var(--graphite-950); }
.btn--ember:hover { background: var(--ember-soft); color: var(--graphite-950); }
.btn--ghost { color: var(--white); border-color: #6b615a; background: transparent; }
.btn--ghost:hover { border-color: var(--ember-soft); color: var(--white); }
.btn--dark { background: var(--graphite-900); color: var(--white); }
.btn--dark:hover { background: var(--graphite-700); color: var(--white); }
.section { padding-block: clamp(2.5rem, 6vw, 4.5rem); }
.section--white { background: var(--white); }
.section--tight { padding-block: 1rem 3rem; }
.section__row { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.section__row h2 { margin-bottom: .8rem; }
.link-more { font-weight: 600; }
.notice { background: var(--white); border-left: 4px solid var(--copper); padding: 1rem 1.25rem; margin: 0; border-radius: 0 8px 8px 0; }
.muted { color: var(--muted); font-size: .95rem; }
.prose { max-width: 68ch; }
.prose h2 { margin-top: 1.6em; font-size: 1.6rem; }
.checks { list-style: none; padding: 0; margin: 0 0 1.5em; }
.checks li { position: relative; padding: .45rem 0 .45rem 1.8rem; border-bottom: 1px solid var(--line); }
.checks li::before {
  content: ""; position: absolute; left: 0; top: .95rem; width: .8rem; height: .8rem; border-radius: 50%;
  background: var(--heat);
}
.page-head { background: var(--graphite-900); color: var(--white); }
.page-head .wrap { padding-block: clamp(1.75rem, 5vw, 3rem); }
.page-head h1 { margin: 0; max-width: 20ch; }
.page-head__lead { margin: .8rem 0 0; color: var(--on-dark-muted); max-width: 55ch; font-size: 1.1rem; }

/* ---------- герой ---------- */
.hero { background:
    radial-gradient(60rem 30rem at 85% 20%, rgba(255,122,26,.18), transparent 70%),
    linear-gradient(180deg, var(--graphite-900), var(--graphite-950));
  color: var(--white); overflow: hidden; }
.hero__grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 2rem; align-items: center; padding-block: clamp(2.5rem, 7vw, 5.5rem); }
.hero h1 { font-size: clamp(2.4rem, 6.4vw, 4.6rem); line-height: 1; max-width: 13ch; margin-bottom: .5em; }
.hero__lead { font-size: 1.15rem; color: var(--on-dark); max-width: 50ch; }
.hero__actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.6rem; }
.hero__art svg { width: 100%; height: auto; display: block; overflow: visible; }
.hero__glow { transform-origin: 210px 200px; animation: breathe 5s ease-in-out infinite; }
.hero__waves path { animation: rise 4s ease-in-out infinite; }
.hero__waves path:nth-child(2) { animation-delay: -1.3s; }
.hero__waves path:nth-child(3) { animation-delay: -2.6s; }
@keyframes breathe { 50% { transform: scale(1.06); opacity: .8; } }
@keyframes rise { 0%, 100% { opacity: .15; } 50% { opacity: .9; } }
@media (max-width: 860px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__art { max-width: 22rem; }
}

/* ---------- плитки категорий ---------- */
.tiles { display: grid; grid-template-columns: repeat(6, 1fr); gap: 1rem; }
.tile {
  grid-column: span 2; display: grid; grid-template-columns: auto 1fr; column-gap: 1rem; align-content: start;
  background: var(--white); border: 1px solid var(--line); border-radius: 14px; padding: 1.4rem;
  text-decoration: none; color: var(--ink); position: relative; overflow: hidden;
}
.tile:nth-child(-n+2) { grid-column: span 3; background: var(--graphite-900); color: var(--white); border-color: var(--graphite-900); }
.tile:nth-child(-n+2) .tile__text { color: var(--on-dark-muted); }
.tile:nth-child(-n+2) .tile__count { color: var(--ember-soft); }
.tile:nth-child(-n+2) .tile__icon { color: var(--ember); }
.tile:hover { border-color: var(--copper); color: inherit; }
.tile:nth-child(-n+2):hover { border-color: var(--ember); }
.tile:nth-child(-n+2) :focus-visible { outline-color: var(--ember-soft); }
.tile__icon { grid-row: span 3; color: var(--copper); width: 3.5rem; }
.tile__icon .ico { width: 3.5rem; height: 3.5rem; display: block; }
.tile__name { font: 700 1.45rem/1.1 var(--font-head); font-stretch: condensed; }
.tile__text { color: var(--muted); font-size: .95rem; margin-top: .3rem; }
.tile__count { font-size: .9rem; font-weight: 600; color: var(--copper); margin-top: .6rem; }
@media (max-width: 900px) {
  .tiles { grid-template-columns: repeat(2, 1fr); }
  .tile, .tile:nth-child(-n+2) { grid-column: span 1; }
  .tile:last-child { grid-column: 1 / -1; }
}
@media (max-width: 560px) {
  .tiles { grid-template-columns: 1fr; }
  .tile { padding: 1.1rem; }
}

/* ---------- карточки товаров ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 235px), 1fr)); gap: 1rem; }
.card {
  display: flex; flex-direction: column; background: var(--white); border: 1px solid var(--line);
  border-radius: 12px; overflow: hidden; text-decoration: none; color: var(--ink);
}
.card:hover { border-color: var(--copper); color: var(--ink); }
.card__media {
  display: grid; place-items: center; height: 9.5rem; color: var(--ember);
  background: radial-gradient(circle at 50% 110%, rgba(255,122,26,.45), transparent 60%), linear-gradient(160deg, var(--graphite-800), var(--graphite-950));
}
.card__media .ico { width: 5rem; height: 5rem; }
.card__body { display: flex; flex-direction: column; gap: .15rem; padding: .9rem 1rem 1.1rem; flex: 1; }
.card__brand { font-size: .85rem; color: var(--muted); }
.card__name { font-weight: 600; line-height: 1.3; }
.card__cat { font-size: .85rem; color: var(--muted); }
.card__price { margin-top: auto; padding-top: .6rem; font: 700 1.5rem/1 var(--font-head); font-stretch: condensed; color: var(--copper); }

/* ---------- преимущества ---------- */
.perks { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr)); gap: 1.5rem 2rem; }
.perks li { border-top: 3px solid var(--copper); padding-top: 1rem; }
.perks h3 { margin-bottom: .4em; }
.perks p { color: var(--muted); margin: 0; }
.perk__icon, .service__icon { display: block; color: var(--copper); margin-bottom: .6rem; }
.perk__icon .ico { width: 2.6rem; height: 2.6rem; }
.service__icon .ico { width: 3rem; height: 3rem; }

/* ---------- блок адреса ---------- */
.address-block { background: var(--graphite-900); color: var(--white); padding-block: clamp(2rem, 5vw, 3.2rem); }
.address-block__grid { display: flex; justify-content: space-between; align-items: center; gap: 1.5rem; flex-wrap: wrap; }
.address-block h2 { margin-bottom: .3em; }
.address-block address { font-size: 1.3rem; color: var(--ember-soft); }
.address-block p { margin: 0; }

/* ---------- каталог ---------- */
.catalog { display: grid; grid-template-columns: 17.5rem 1fr; gap: 2rem; padding-block: 2rem 4rem; align-items: start; }
.filters { background: var(--white); border: 1px solid var(--line); border-radius: 12px; }
.filters summary { padding: .9rem 1.1rem; font-weight: 600; cursor: pointer; list-style: none; }
.filters summary::-webkit-details-marker { display: none; }
.filters summary::after { content: "+"; float: right; font-size: 1.3rem; line-height: 1; }
.filters[open] summary::after { content: "−"; }
.filters__body { padding: 1.1rem; display: grid; gap: 1.1rem; }
.filters__title, .price legend { font-weight: 600; margin: 0 0 .4rem; padding: 0; }
.field label { display: block; font-size: .9rem; font-weight: 600; margin-bottom: .3rem; }
input, select {
  width: 100%; font: inherit; color: var(--ink); background: var(--white);
  border: 1.5px solid #8a827b; border-radius: 8px; padding: .6rem .75rem; min-height: 2.75rem;
}
input:focus-visible, select:focus-visible { outline: 3px solid var(--copper); outline-offset: 1px; border-color: var(--copper); }
.price { border: 0; margin: 0; padding: 0; min-width: 0; }
.price__row { display: grid; grid-template-columns: 1fr 1fr; gap: .6rem; }
.tree ul { list-style: none; margin: 0; padding: 0; }
.tree a {
  display: flex; justify-content: space-between; gap: .5rem; padding: .4rem .6rem; border-radius: 6px;
  text-decoration: none; color: var(--ink);
}
.tree a span { color: var(--muted); font-size: .85rem; }
.tree a:hover { background: var(--stone); }
.tree__top { font-weight: 600; }
.tree__kids { margin: .1rem 0 .4rem .9rem !important; border-left: 2px solid var(--line); }
.tree__sub { font-size: .95rem; }
.tree a[aria-current="true"] { background: var(--graphite-900); color: var(--white); }
.tree a[aria-current="true"] span { color: var(--ember-soft); }
.results__count { margin: 0 0 1rem; color: var(--muted); font-weight: 600; min-height: 1.6em; }
@media (min-width: 900px) {
  .filters { position: sticky; top: 5rem; max-height: calc(100vh - 6rem); overflow: auto; }
  .filters summary { display: none; }
}
@media (max-width: 899px) { .catalog { grid-template-columns: 1fr; gap: 1rem; } }

/* ---------- товар ---------- */
.product-page { padding-top: 1.5rem; }
.crumbs ol { list-style: none; margin: 0 0 1.5rem; padding: 0; display: flex; flex-wrap: wrap; gap: .3rem .5rem; font-size: .92rem; color: var(--muted); }
.crumbs li + li::before { content: "/"; margin-right: .5rem; color: var(--line); }
.crumbs [aria-current] { color: var(--ink); }
.product { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: clamp(1.5rem, 4vw, 3rem); align-items: start; }
.product__media {
  display: grid; place-items: center; aspect-ratio: 1; border-radius: 16px; color: var(--ember);
  background: radial-gradient(circle at 50% 105%, rgba(255,122,26,.5), transparent 62%), linear-gradient(160deg, var(--graphite-800), var(--graphite-950));
}
.product__media .ico { width: 45%; height: 45%; }
.product__brand { color: var(--muted); font-weight: 600; margin-bottom: .3rem; }
.product h1 { font-size: clamp(1.8rem, 4.2vw, 2.6rem); }
.product__desc { font-size: 1.1rem; max-width: 52ch; }
.product__price { font: 700 clamp(2.2rem, 6vw, 3rem)/1 var(--font-head); font-stretch: condensed; color: var(--copper); margin: 1.2rem 0; }
.availability { background: var(--white); border-left: 4px solid var(--copper); padding: 1rem 1.25rem; border-radius: 0 10px 10px 0; }
.specs { margin-top: 2.5rem; max-width: 46rem; }
.specs table { width: 100%; border-collapse: collapse; background: var(--white); border-radius: 10px; overflow: hidden; }
.specs th, .specs td { text-align: left; padding: .7rem 1rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.specs th { width: 42%; font-weight: 500; color: var(--muted); }
.specs tr:last-child > * { border-bottom: 0; }
@media (max-width: 760px) { .product { grid-template-columns: 1fr; } .product__media { aspect-ratio: 16 / 9; } .product__media .ico { width: 30%; height: 70%; } }

/* ---------- услуги и контакты ---------- */
.services { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); gap: 1.25rem; }
.service { background: var(--white); border: 1px solid var(--line); border-radius: 14px; padding: 1.6rem; }
.service h2 { font-size: 1.6rem; }
.service ul { margin: 0; padding-left: 1.1rem; color: var(--muted); }
.service li { margin-bottom: .3rem; }
.services__note { margin-top: 2rem; font-size: 1.1rem; }
.contacts { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(1.5rem, 5vw, 4rem); }
.contacts__addr { font: 700 clamp(1.5rem, 3.5vw, 2.1rem)/1.15 var(--font-head); font-stretch: condensed; margin-bottom: 1.2rem; }
.contacts .prose h2 { margin-top: 0; }
@media (max-width: 760px) { .contacts { grid-template-columns: 1fr; } }

/* ---------- подвал ---------- */
.site-footer { background: var(--graphite-950); color: var(--on-dark-muted); }
.site-footer a { color: var(--ember-soft); }
.site-footer a:hover { color: var(--white); }
.site-footer__grid { display: grid; grid-template-columns: 1.4fr 1fr 1.2fr; gap: 2rem; padding-block: 2.5rem 1.5rem; }
.site-footer__brand { font: 700 1.8rem/1 var(--font-head); font-stretch: condensed; color: var(--white); margin-bottom: .6rem; }
.site-footer__title { color: var(--white); font-weight: 600; margin-bottom: .5rem; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: .25rem; }
.site-footer__legal { border-top: 1px solid var(--graphite-700); padding-block: 1.1rem 1.8rem; font-size: .9rem; }
.site-footer__legal p { margin: 0 0 .3rem; }
@media (max-width: 760px) { .site-footer__grid { grid-template-columns: 1fr; gap: 1.4rem; } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

/* телефоны: карточки по две в ряд */
@media (max-width: 560px) {
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .7rem; }
  .card__media { height: 6.5rem; }
  .card__media .ico { width: 3.6rem; height: 3.6rem; }
  .card__body { padding: .7rem .75rem .9rem; }
  .card__name { font-size: .95rem; }
  .card__price { font-size: 1.3rem; }
}