:root {
  --color-bg: #f5f6f8;
  --color-surface: #ffffff;
  --color-text: #1d232b;
  --color-muted: #5b6573;
  --color-border: #dde1e6;
  --color-border-strong: #c5cbd3;
  --color-accent: #c2410c;
  --color-accent-dark: #9a3412;
  --color-focus: #fdba74;
  --color-whatsapp: #15803d;
  --color-error: #b91c1c;
  --color-backdrop: rgba(15, 23, 32, .45);
  --radius: 8px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 2px 6px rgba(16, 24, 40, .08);
  --container: 1200px;
  --container-wide: 1440px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font); font-size: 16px; line-height: 1.6; color: var(--color-text); background: var(--color-bg); }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); }
a:hover { color: var(--color-accent-dark); }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; }
h1 { font-size: clamp(1.6rem, 1.2rem + 2vw, 2.4rem); }
h2 { font-size: clamp(1.3rem, 1.1rem + 1vw, 1.75rem); }
h3 { font-size: 1.15rem; }
:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 2px; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding-inline: 16px; }
.container--wide { max-width: var(--container-wide); }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: 16px; top: 8px; z-index: 100; background: var(--color-surface); padding: 8px 12px; }

.logo { margin-right: auto; font-weight: 800; font-size: 1.1rem; color: var(--color-text); text-decoration: none; }
.logo span { color: var(--color-accent); }
.logo__img { height: 48px; max-width: 260px; object-fit: contain; display: block; }
@media (max-width: 640px) {
  .logo__img { height: 40px; }
}

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 20px; border: 1px solid transparent; border-radius: var(--radius); font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; transition: background-color .15s; }
.btn--primary { background: var(--color-accent); color: #fff; }
.btn--primary:hover { background: var(--color-accent-dark); color: #fff; }
.btn--whatsapp { background: var(--color-whatsapp); color: #fff; }
.btn--whatsapp:hover { background: #166534; color: #fff; }
.btn--ghost { background: transparent; border-color: var(--color-border); color: var(--color-text); }
.btn--ghost:hover { border-color: var(--color-border-strong); color: var(--color-text); }
.btn[disabled] { opacity: .5; cursor: not-allowed; }

/* Top bar */
.topbar { background: var(--color-surface); border-bottom: 1px solid var(--color-border); }
.topbar__inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; }
.topbar__contact { display: flex; align-items: center; gap: 16px; font-weight: 600; }
.topbar__contact a { color: var(--color-text); text-decoration: none; }
.topbar__contact a:hover { color: var(--color-accent); }
.topbar__contact .btn { padding: 8px 16px; }
@media (max-width: 1099.98px) {
  .topbar__contact { display: none; }
}

/* Mobile bar: category drawer + quote shortcuts, <1100px only */
.mobile-bar { background: var(--color-surface); border-bottom: 1px solid var(--color-border); }
.mobile-bar__inner { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-block: 10px; }
.categories-toggle::before { content: "\2630"; font-size: .9em; }
.cart-link { display: inline-flex; align-items: center; gap: 8px; padding: 10px 16px; border: 1px solid var(--color-border); border-radius: 999px; color: var(--color-text); text-decoration: none; font-weight: 600; }
.cart-link:hover { border-color: var(--color-border-strong); color: var(--color-text); }
.cart-count { display: inline-flex; align-items: center; justify-content: center; min-width: 22px; height: 22px; padding: 0 6px; border-radius: 999px; background: var(--color-accent); color: #fff; font-size: .8rem; }
@media (min-width: 1100px) {
  .mobile-bar { display: none; }
}

/* Three-column page layout */
.layout { max-width: var(--container-wide); margin-inline: auto; padding-inline: 16px; padding-block: 24px 48px; }

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 60;
  width: min(300px, 85vw);
  height: 100vh;
  overflow-y: auto;
  padding: 20px 16px;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  transform: translateX(-100%);
  transition: transform .25s ease;
}
.sidebar--open { transform: translateX(0); box-shadow: var(--shadow); }
.sidebar__title { margin-bottom: 12px; font-size: 1.05rem; }
.category-nav ul { display: grid; gap: 2px; margin: 0; padding: 0; list-style: none; }
.category-nav a { display: block; padding: 10px 12px; border-radius: var(--radius); color: var(--color-text); text-decoration: none; font-weight: 500; }
.category-nav a:hover { background: var(--color-bg); }
.category-nav a[aria-current="page"] { background: var(--color-accent); color: #fff; font-weight: 600; }

.drawer-backdrop { position: fixed; inset: 0; z-index: 55; background: var(--color-backdrop); border: 0; padding: 0; }

.content { min-width: 0; container-type: inline-size; }
.side-panel { display: flex; flex-direction: column; gap: 24px; min-width: 0; margin-top: 24px; }

@media (min-width: 700px) {
  .layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 24px; align-items: start; }
  .side-panel { margin-top: 0; }
}

@media (min-width: 1100px) {
  .layout { grid-template-columns: 240px minmax(0, 1fr) 320px; }
  .sidebar {
    position: sticky;
    top: 16px;
    left: auto;
    z-index: auto;
    width: auto;
    height: auto;
    max-height: calc(100vh - 32px);
    align-self: start;
    padding: 0;
    background: transparent;
    border-right: 0;
    transform: none;
  }
  .side-panel { position: sticky; top: 16px; align-self: start; max-height: calc(100vh - 32px); overflow-y: auto; }
  .drawer-backdrop { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .sidebar { transition: none; }
}

/* Common blocks */
.breadcrumbs { margin-bottom: 16px; font-size: .9rem; color: var(--color-muted); }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 4px 8px; list-style: none; margin: 0; padding: 0; }
.breadcrumbs li + li::before { content: "/"; margin-right: 8px; color: var(--color-border); }
.breadcrumbs a { color: var(--color-muted); }
.page-head { margin-bottom: 24px; }
.page-head p { max-width: 60ch; color: var(--color-muted); }
.section { margin-block: 40px; }
.section__head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 8px 16px; margin-bottom: 16px; }
.category-block { margin-block: 40px; }
.panel { margin-top: 24px; padding: clamp(16px, 3vw, 32px); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); }
.side-panel .panel { margin-top: 0; }
.side-panel h2 { font-size: 1.15rem; }
.note { color: var(--color-muted); font-size: .95rem; }

/* Catalog */
.category-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; }
.category-card { display: flex; flex-direction: column; justify-content: space-between; min-height: 110px; padding: 18px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); color: var(--color-text); text-decoration: none; transition: border-color .15s, box-shadow .15s; }
.category-card:hover { border-color: var(--color-accent); box-shadow: var(--shadow); color: var(--color-text); }
.category-card__name { font-weight: 700; }
.category-card__count { color: var(--color-muted); font-size: .9rem; }

.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 20px; }
.product-card { display: flex; flex-direction: column; overflow: hidden; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); transition: border-color .15s, box-shadow .15s; }
.product-card:hover { border-color: var(--color-border-strong); box-shadow: var(--shadow); }
.product-card__image { display: flex; align-items: center; justify-content: center; aspect-ratio: 4 / 3; padding: 12px; background: #fff; border-bottom: 1px solid var(--color-border); color: inherit; text-decoration: none; }
.product-card__image img { max-height: 100%; object-fit: contain; }
.product-card__placeholder { color: var(--color-muted); font-size: .9rem; }
.product-card__body { display: flex; flex: 1; flex-direction: column; gap: 6px; padding: 14px 16px 18px; }
.product-card__name { color: var(--color-text); font-weight: 600; line-height: 1.35; text-decoration: none; }
.product-card__name:hover { color: var(--color-accent); }
.product-card__model { color: var(--color-muted); font-size: .9rem; }
.product-card__price { font-weight: 700; }
.price-on-request { color: var(--color-muted); font-weight: 500; }
.product-card__add { margin-top: auto; width: 100%; }

/* Product */
.product { display: grid; grid-template-columns: 1fr; gap: 24px; padding: clamp(16px, 3vw, 32px); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); }
@container (min-width: 640px) {
  .product { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px; }
}
.product__main-image { display: flex; align-items: center; justify-content: center; aspect-ratio: 4 / 3; padding: 12px; background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius); }
.product__main-image img { max-height: 100%; object-fit: contain; }
.product__thumbs { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.product__thumbs button { width: 72px; height: 72px; padding: 4px; background: #fff; border: 1px solid var(--color-border); border-radius: 6px; cursor: pointer; }
.product__thumbs button[aria-current="true"] { border-color: var(--color-accent); }
.product__thumbs img { width: 100%; height: 100%; object-fit: contain; }
.product__model { color: var(--color-muted); }
.product__short { color: var(--color-muted); font-size: 1.05rem; }
.product__price { margin-block: 16px; font-size: 1.5rem; font-weight: 800; }
.product__actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-block: 20px; }
.qty { display: inline-flex; align-items: center; overflow: hidden; border: 1px solid var(--color-border); border-radius: var(--radius); background: #fff; }
.qty input { width: 76px; padding: 11px 8px; border: 0; font: inherit; text-align: center; }
.specs { width: 100%; border-collapse: collapse; }
.specs th, .specs td { padding: 10px 12px; border-bottom: 1px solid var(--color-border); text-align: left; vertical-align: top; }
.specs th { width: 50%; color: var(--color-muted); font-weight: 500; }
.prose { max-width: 76ch; }
.prose table { display: block; overflow-x: auto; width: 100%; margin-block: 16px; border-collapse: collapse; }
.prose th, .prose td { padding: 8px 10px; border: 1px solid var(--color-border); text-align: left; }
.prose th { background: var(--color-bg); }

/* Contacts */
.contacts-list { display: grid; gap: 14px; margin: 0; padding: 0; list-style: none; }
.contacts-list strong { display: block; color: var(--color-muted); font-weight: 500; font-size: .9rem; }

/* Right panel: quote request + contacts */
.quote-panel__title { margin-bottom: 4px; }
.quote-list { display: grid; gap: 12px; margin: 0 0 16px; padding: 0; list-style: none; }
.quote-item { display: flex; flex-direction: column; gap: 8px; padding: 12px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); }
.quote-item__name { color: var(--color-text); font-weight: 600; text-decoration: none; }
.quote-item__name:hover { color: var(--color-accent); }
.quote-item__row { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.quote-item__remove { padding: 4px 10px; background: none; border: 0; color: var(--color-muted); font-size: 1.4rem; line-height: 1; cursor: pointer; }
.quote-empty { padding: 24px; background: var(--color-bg); border: 1px dashed var(--color-border); border-radius: var(--radius); color: var(--color-muted); text-align: center; }

.form { display: grid; gap: 16px; }
.form__row { display: grid; gap: 6px; }
.form__row label { font-weight: 600; }
.form input[type="text"], .form input[type="tel"] { width: 100%; padding: 12px; border: 1px solid var(--color-border); border-radius: var(--radius); font: inherit; }
.form__error { margin: 0; color: var(--color-error); font-size: .9rem; }
.form__hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.form .btn--primary { width: 100%; }

.contacts-panel { display: flex; flex-direction: column; gap: 12px; }
.contacts-panel .btn--whatsapp { width: 100%; }
.pricelist-panel .btn { width: 100%; }

.notice { padding: 12px 16px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); }
.notice--error { background: #fef2f2; border-color: #fecaca; color: var(--color-error); }
.notice--success { background: #f0fdf4; border-color: #bbf7d0; color: #14532d; }
.toast { position: fixed; left: 50%; bottom: 24px; z-index: 100; display: flex; align-items: center; gap: 12px; max-width: calc(100% - 32px); padding: 12px 18px; transform: translateX(-50%); background: var(--color-text); color: #fff; border-radius: var(--radius); box-shadow: var(--shadow); }
.toast a { color: var(--color-focus); }

/* Footer */
.site-footer { margin-top: 48px; padding-block: 32px; background: var(--color-text); color: #d1d5db; }
.site-footer h2 { font-size: 1rem; color: #fff; }
.site-footer a { color: #fff; }
.site-footer p { margin: 0; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; }