/* ============================================================
   SECTIONS — крупные блоки главной (hero, бенто, акции, шаги, доверие).
   Атомы — в components.css, переменные — в tokens.css.
   Ритм: чередование белый → синий-тинт → тёмный (anti-«иишность»).
   ============================================================ */

/* Фактуры (используются на тёмных блоках) */
.fx-grain::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0.5; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.fx-grid::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0.5;
  background-image:
    linear-gradient(rgba(255,255,255,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.045) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(120% 90% at 70% 0%, #000 30%, transparent 80%);
          mask-image: radial-gradient(120% 90% at 70% 0%, #000 30%, transparent 80%);
}

/* ============================================================
   HERO — тёмный, асимметричный, type-first
   ============================================================ */
.hero {
  position: relative; overflow: clip;
  background:
    linear-gradient(90deg, rgba(15,27,42,0.98) 0%, rgba(15,27,42,0.9) 40%, rgba(15,27,42,0.60) 66%, rgba(15,27,42,0.86) 100%),
    radial-gradient(85% 115% at 78% 4%, rgba(29,111,168,0.42), transparent 58%),
    url("/img/azot-pattern.svg") center / cover no-repeat,
    url("/assets/img/hero/warehouse-cylinders-bg.webp") center / cover no-repeat;
  background-color: var(--c-dark);
  color: var(--c-on-dark);
}
.hero__inner {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1.15fr 0.85fr; align-items: center; gap: var(--space-xl);
  padding-block: clamp(2rem, 1.2rem + 3.5vw, 4.25rem);
}
.hero__content { min-width: 0; }
.hero__badge {
  display: inline-flex; align-items: center; gap: 0.45em;
  padding: 0.42em 0.7em; border-radius: var(--radius-sm);
  background: rgba(56,189,248,0.12); color: #bfe6fb; border: 1px solid rgba(56,189,248,0.34);
  font-size: var(--fs-50); font-weight: var(--fw-bold); letter-spacing: 0.07em; text-transform: uppercase;
}
.hero h1 {
  color: #fff; font-size: var(--fs-700); margin-top: var(--space-sm);
  letter-spacing: -0.025em;
}
.hero h1 .accent { color: var(--c-accent); }
.hero__lead { color: #c7d2e0; font-size: var(--fs-300); line-height: 1.5; margin-top: var(--space-sm); max-width: min(48ch, 100%); }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-sm); margin-top: var(--space-lg); align-items: center; }
.hero__note { color: rgba(199,210,224,0.55); font-size: 0.72rem; margin-top: var(--space-sm); line-height: 1.4; }
.hero__trust { display: flex; flex-wrap: wrap; gap: var(--space-sm) var(--space-md); margin-top: var(--space-md); }
.hero__trust li { display: inline-flex; align-items: center; gap: 0.45em; color: #aebccd; font-size: var(--fs-100); font-weight: var(--fw-semibold); }
.hero__trust .icon { color: var(--c-success); }
.hero__live { display: inline-flex; align-items: center; gap: 0.55em; margin-top: var(--space-md);
  color: #d7e9df; font-size: var(--fs-100); font-weight: var(--fw-semibold); }

/* Медиа: баллон + свечение + дымка */
.hero__media { position: relative; display: grid; place-items: center; min-height: 300px; }
.hero__cylinder {
  position: relative; z-index: 2;
  width: auto; height: clamp(330px, 34vw, 500px); max-width: min(38vw, 380px);
  object-fit: contain; pointer-events: none;
  filter: drop-shadow(0 32px 48px rgba(0,0,0,0.58));
}
.hero__glow {
  position: absolute; z-index: 1; width: 70%; aspect-ratio: 1; border-radius: 50%;
  background: radial-gradient(circle, rgba(29,111,168,0.55), transparent 65%); filter: blur(30px);
}
/* Дымка азота */

/* ============================================================
   КАТАЛОГ — бенто (азот крупнее)
   ============================================================ */
.bento { display: grid; gap: var(--space-md); grid-template-columns: repeat(3, 1fr); }
.bento .gas-tile--flagship { grid-column: span 1; grid-row: span 2; flex-direction: column; align-items: flex-start; text-align: left; }
.bento .gas-tile--flagship .gas-tile__media { width: 100%; }
.bento .gas-tile--flagship .gas-tile__media .cylinder { height: 190px; }
.bento .gas-tile--flagship .gas-tile__title { font-size: var(--fs-400); }

/* ============================================================
   ПРЕИМУЩЕСТВА
   ============================================================ */
.advantages { display: grid; gap: var(--space-md); grid-template-columns: repeat(4, 1fr); }
.advantage { display: grid; gap: var(--space-2xs); padding: var(--space-md);
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg); }
.advantage__ic { display: grid; place-items: center; width: 48px; height: 48px; border-radius: var(--radius-md);
  background: var(--c-surface); color: var(--c-ink); }
.advantage h3 { font-size: var(--fs-300); }
.advantage p { color: var(--c-ink-2); font-size: var(--fs-100); }

/* ============================================================
   КАК ЗАКАЗАТЬ — шаги
   ============================================================ */
.steps { display: grid; gap: var(--space-md); grid-template-columns: repeat(3, 1fr); counter-reset: step; }
.step { position: relative; padding: var(--space-lg) var(--space-md) var(--space-md);
  background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.1); border-radius: var(--radius-lg); }
.step::before { counter-increment: step; content: counter(step);
  position: absolute; top: calc(-1 * var(--space-sm)); left: var(--space-md);
  width: 42px; height: 42px; display: grid; place-items: center; border-radius: var(--radius-sm);
  background: var(--c-primary); color: #fff; font-family: var(--font-display); font-weight: var(--fw-extrabold); font-size: var(--fs-300); }
.step h3 { color: #fff; font-size: var(--fs-300); margin-top: var(--space-2xs); }
.step p { color: #c7d2e0; font-size: var(--fs-100); }

/* ============================================================
   АКЦИИ
   ============================================================ */
.promos { display: grid; gap: var(--space-md); grid-template-columns: repeat(3, 1fr); }
.promo { position: relative; padding: var(--space-lg) var(--space-md); border-radius: var(--radius-md);
  background-color: rgba(255,255,255,0.04);
  background-image: url("data:image/svg+xml,%3Csvg width='32' height='26' viewBox='0 0 32 26' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M14 0v3.994C14 7.864 10.858 11 7 11c-3.866 0-7-3.138-7-7.006V0h2v4.005C2 6.765 4.24 9 7 9c2.756 0 5-2.236 5-4.995V0h2zm0 26v-5.994C14 16.138 10.866 13 7 13c-3.858 0-7 3.137-7 7.006V26h2v-6.005C2 17.235 4.244 15 7 15c2.76 0 5 2.236 5 4.995V26h2zm2-18.994C16 3.136 19.142 0 23 0c3.866 0 7 3.138 7 7.006v9.988C30 20.864 26.858 24 23 24c-3.866 0-7-3.138-7-7.006V7.006zm2-.01C18 4.235 20.244 2 23 2c2.76 0 5 2.236 5 4.995v10.01C28 19.765 25.756 22 23 22c-2.76 0-5-2.236-5-4.995V6.995z' fill='%2338BDF8' fill-opacity='0.09' fill-rule='evenodd'/%3E%3C/svg%3E");
  border: 1px solid rgba(255,255,255,0.1);
  box-shadow: inset 0 2px 0 var(--c-accent), 0 4px 24px rgba(56,189,248,0.08);
  color: #fff; }
.promo__tag { color: var(--c-accent); font-weight: var(--fw-bold); font-size: var(--fs-50); letter-spacing: 0.08em; text-transform: uppercase; }
.promo h3 { color: #fff; font-size: var(--fs-300); margin: var(--space-3xs) 0; }
.promo p { color: #c7d2e0; font-size: var(--fs-100); }
.promo__price { font-family: var(--font-display); font-weight: var(--fw-extrabold); font-size: var(--fs-400); color: var(--c-accent); margin-top: var(--space-2xs); }

.buyback { display: flex; flex-wrap: wrap; gap: var(--space-2xs); margin-top: var(--space-lg); align-items: center; }
.buyback__title { color: #fff; font-weight: var(--fw-bold); margin-right: var(--space-2xs); }
.buyback__item { display: inline-flex; gap: 0.4em; align-items: baseline; padding: 0.45em 0.8em; border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12); color: #e6edf5; font-size: var(--fs-100); }
.buyback__item b { color: var(--c-success); }

/* ============================================================
   ДОВЕРИЕ — сферы клиентов
   ============================================================ */
.spheres { display: grid; gap: var(--space-sm); grid-template-columns: repeat(4, 1fr); }
.sphere { display: flex; align-items: center; gap: var(--space-2xs); padding: var(--space-sm) var(--space-md);
  background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--radius-md); font-weight: var(--fw-semibold); }
.sphere .icon { color: var(--c-primary); }

/* ============================================================
   ФАКТЫ В ЦИФРАХ
   ============================================================ */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-md); text-align: center; }
.stat { display: grid; gap: 0.15em; padding: var(--space-sm); }
.stat__value { font-family: var(--font-display); font-weight: var(--fw-extrabold);
  font-size: var(--fs-600); line-height: 1; color: var(--c-primary);
  font-variant-numeric: tabular-nums; letter-spacing: -0.03em; }
.stat__label { color: var(--c-ink-2); font-size: var(--fs-100); }
.stat + .stat { border-left: 1px solid var(--c-line); }

/* ============================================================
   ДОКУМЕНТЫ И СЕРТИФИКАТЫ
   ============================================================ */
.trust-split { display: grid; grid-template-columns: 1.4fr 1fr; gap: var(--space-xl); align-items: start; }
.docs { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-md); }
.doc-card { display: flex; flex-direction: column; gap: var(--space-xs);
  padding: var(--space-md); background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xs); position: relative; transition: box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease); }
.doc-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.doc-card__head { display: flex; align-items: center; gap: var(--space-sm); }
.doc-card__ic { display: grid; place-items: center; width: 46px; height: 46px; flex: none; border-radius: var(--radius-md);
  background: var(--c-success-50); color: var(--c-success); }
.doc-card h3 { font-size: var(--fs-200); margin: 0; }
.doc-card p { font-size: var(--fs-100); color: var(--c-ink-2); margin: 0; }
.doc-card__tag { margin-top: auto; align-self: flex-start; padding-top: var(--space-xs); }

/* Ссылки на документы */
.doc-card__links { display: grid; grid-template-columns: 1fr 1fr; gap: 2px 6px; margin-top: auto; padding-top: var(--space-xs); }
.doc-card__link { display: inline-flex; align-items: flex-start; gap: 4px; font-size: var(--fs-50); line-height: 1.2; color: var(--c-primary); text-decoration: none; transition: color var(--dur) var(--ease); }
.doc-card__link:hover { color: var(--c-primary-800); text-decoration: underline; }
.doc-card__link .icon { flex: none; opacity: 0.7; }

.guarantees-box { background: var(--c-dark); border: 1px solid rgba(255,255,255,0.08); border-radius: var(--radius-lg); padding: var(--space-lg); }
.guarantees-box h3 { font-size: var(--fs-300); margin-bottom: var(--space-sm); color: #fff; }
.guarantees-box .guarantee__text { color: #c7d2e0; }
.guarantees { display: grid; gap: var(--space-sm); }
.guarantee { display: grid; grid-template-columns: auto 1fr; gap: 0.6em; align-items: start; font-size: var(--fs-100); color: #c7d2e0; }
.guarantee .icon { color: var(--c-success); margin-top: 0.15em; }

/* ============================================================
   ОТЗЫВЫ
   ============================================================ */
.reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md); }
.review { display: grid; gap: var(--space-sm); padding: var(--space-lg); background: #fff;
  border: 1px solid var(--c-line); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
.review__quote { font-size: var(--fs-300); line-height: 1; color: var(--c-primary-100); font-family: var(--font-display); font-weight: var(--fw-extrabold); }
.review__text { color: var(--c-ink); }
.review__author { display: grid; gap: 0.1em; }
.review__name { font-weight: var(--fw-bold); }
.review__role { font-size: var(--fs-100); color: var(--c-ink-2); }
.reviews-chips { display: flex; flex-wrap: wrap; gap: var(--space-2xs); margin-bottom: var(--space-lg); }

/* ============================================================
   CTA-секция (тёмная)
   ============================================================ */
.cta-band { position: relative; overflow: clip; }
.cta-band__grid { position: relative; z-index: 2; display: grid; grid-template-columns: 1.1fr 0.9fr; gap: var(--space-xl); align-items: center; }
.cta-band h2 { color: #fff; }
.cta-band p { color: var(--c-on-dark); opacity: 0.85; }

/* ============================================================
   PAGE HERO (страницы газов / каталога) — компактный тёмный
   ============================================================ */
.page-hero { position: relative; overflow: clip; color: var(--c-on-dark);
  background:
    url("/img/azot-pattern.svg") center / cover no-repeat,
    radial-gradient(80% 120% at 85% -10%, rgba(29,111,168,0.45), transparent 55%),
    linear-gradient(165deg, #0f1b2a, #142838);
  background-color: var(--c-dark); }
.page-hero__inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1.3fr 0.7fr;
  gap: var(--space-xl); align-items: center; padding-block: clamp(2rem, 1.2rem + 3vw, 4rem); }
.page-hero__inner--solo { grid-template-columns: 1fr; }
.page-hero h1 { color: #fff; }
.page-hero__lead { color: #b6c4d6; font-size: var(--fs-300); line-height: 1.5; margin-top: var(--space-sm); max-width: 56ch; }
.page-hero__grades { display: flex; flex-wrap: wrap; gap: var(--space-2xs); margin-top: var(--space-md); }
.page-hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-sm); margin-top: var(--space-lg); }
.page-hero__media { position: relative; display: grid; place-items: center; }
.page-hero__media .cylinder { position: relative; z-index: 2; height: clamp(190px, 20vw, 280px); width: auto;
  filter: drop-shadow(0 24px 40px rgba(0,0,0,0.5)); }
.page-hero__img { position: relative; z-index: 2; height: clamp(220px, 22vw, 320px); width: auto; object-fit: contain;
  filter: drop-shadow(0 24px 40px rgba(0,0,0,0.55)); }

.breadcrumb { font-size: var(--fs-100); color: #b3a6aa; margin-bottom: var(--space-sm); }
.breadcrumb a { color: #cdbfc3; }
.breadcrumb a:hover { color: #fff; }

/* Применение */
.applications { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-sm); }
.application { display: grid; grid-template-columns: auto 1fr; gap: 0.6em; align-items: start;
  padding: var(--space-sm) var(--space-md); background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-md); }
.application .icon { color: var(--c-primary); margin-top: 0.15em; }

.section--applications {
  background-image:
    linear-gradient(rgba(250,247,242,0.93), rgba(250,247,242,0.93)),
    url("/assets/img/content-img.webp");
  background-size: cover;
  background-position: center;
}

.section--reviews {
  background-image: url("data:image/svg+xml,%3Csvg width='6' height='6' viewBox='0 0 6 6' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%230F1B2A' fill-opacity='0.05' fill-rule='evenodd'%3E%3Cpath d='M5 0h1L0 6V5zM6 5v1H5z'/%3E%3C/g%3E%3C/svg%3E");
}

/* Флагман-азот: тёмный «спотлайт» — белые карточки светятся как витрина.
   Переопределяет .section--primary-tint (бледно-розовый паттерн раздувался cover'ом). */
.section--products {
  position: relative;
  background:
    radial-gradient(120% 85% at 78% -12%, rgba(29, 111, 168, 0.30), transparent 58%),
    linear-gradient(180deg, #142838 0%, #0f1b2a 100%);
  color: var(--c-on-dark);
}
.section--products > .container { position: relative; z-index: 1; }
.section--products .section__head h2 { color: #fff; }
.section--products .section__eyebrow { color: var(--c-accent); }
.section--products .section__lead { color: rgba(237, 230, 221, 0.72); }
/* Карточки парят над тёмным фоном */
.section--products .product-card { border-color: transparent; box-shadow: 0 18px 40px rgba(0, 0, 0, 0.38); }
.section--products .product-card:hover { box-shadow: 0 26px 56px rgba(0, 0, 0, 0.48); border-color: transparent; }

/* ============================================================
   ДОСТАВКА / КОНТАКТЫ
   ============================================================ */
.map { width: 100%; border: 1px solid var(--c-line); border-radius: var(--radius-lg); overflow: hidden; background: var(--c-surface); }
.map iframe { width: 100%; height: 380px; border: 0; display: block; }

.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: var(--space-xl); align-items: start; }
.contact-list { display: grid; gap: var(--space-md); }
.contact-item { display: grid; grid-template-columns: auto 1fr; gap: var(--space-sm); align-items: start; }
.contact-item__ic { display: grid; place-items: center; width: 44px; height: 44px; flex: none;
  border-radius: var(--radius-md); background: var(--c-primary-50); color: var(--c-primary); }
.contact-item__label { font-size: var(--fs-100); color: var(--c-ink-2); }
.contact-item__value { font-family: var(--font-display); font-weight: var(--fw-bold); font-size: var(--fs-300); line-height: 1.2; }
.contact-item__value a { color: var(--c-ink); }
.contact-item__value a:hover { color: var(--c-primary); }
.contact-item__sub { font-size: var(--fs-100); color: var(--c-ink-3); }

.zone-chips { display: flex; flex-wrap: wrap; gap: var(--space-2xs); margin-top: var(--space-md); }

.prose { max-width: 70ch; }
.prose p { margin-bottom: var(--space-sm); color: var(--c-ink-2); }
.prose p strong { color: var(--c-ink); }

/* ============================================================
   АДАПТИВ секций
   ============================================================ */
@media (max-width: 900px) {
  /* Контент на всю ширину; баллон — приглушённый фон за текстом, растушёван к левому краю */
  .hero__inner { position: relative; grid-template-columns: 1fr; gap: var(--space-md); padding-block: var(--space-xl) var(--space-lg); }
  .hero__media {
    position: absolute; top: 0; right: -28%; bottom: 0; left: auto; width: 72%; min-height: 0;
    z-index: 1; opacity: 1; pointer-events: none;
    -webkit-mask-image: linear-gradient(to left, #000 45%, transparent 82%);
            mask-image: linear-gradient(to left, #000 45%, transparent 82%);
  }
  .hero__cylinder { height: 82%; max-height: 360px; max-width: 100%; opacity: 1; filter: drop-shadow(0 20px 36px rgba(0,0,0,0.45)); }
  .hero__glow { display: none; }
  .hero__content { position: relative; z-index: 2; max-width: 100%; }
  .hero h1 { margin-top: var(--space-2xs); }
  .bento { grid-template-columns: repeat(2, 1fr); }
  .bento .gas-tile--flagship { grid-column: span 2; grid-row: span 1; flex-direction: row; align-items: center; }
  .bento .gas-tile--flagship .gas-tile__media { width: 64px; }
  .bento .gas-tile--flagship .gas-tile__media .cylinder { height: 110px; }
  .advantages { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; gap: var(--space-xl); }
  .promos { grid-template-columns: 1fr; }
  .spheres { grid-template-columns: repeat(2, 1fr); }
  .cta-band__grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); gap: var(--space-sm); }
  .stat:nth-child(odd) { border-left: none; }
  .stat:nth-child(3), .stat:nth-child(4) { border-top: 1px solid var(--c-line); padding-top: var(--space-md); }
  .trust-split { grid-template-columns: 1fr; gap: var(--space-lg); }
  .reviews { grid-template-columns: 1fr; }
  .page-hero__inner { position: relative; grid-template-columns: 1fr; }
  .page-hero__media {
    position: absolute; top: 0; right: -15%; bottom: 0; left: auto; width: 58%; min-height: 0;
    z-index: 1; pointer-events: none;
    -webkit-mask-image: linear-gradient(to left, #000 22%, transparent 62%);
            mask-image: linear-gradient(to left, #000 22%, transparent 62%);
  }
  .page-hero__img { height: 85%; max-height: 380px; max-width: 100%; }
  .page-hero__content { position: relative; z-index: 2; }
  .applications { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: var(--space-lg); }
}
@media (max-width: 520px) {
  .hero__trust { display: grid; gap: var(--space-2xs); }
  .hero__trust li { min-width: 0; }
  /* Каталог — горизонтальный слайдер */
  .bento {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    gap: var(--space-sm);
    padding-bottom: var(--space-xs);
  }
  .bento::-webkit-scrollbar { display: none; }
  .bento > * {
    flex: 0 0 84%;
    scroll-snap-align: start;
    min-width: 0;
  }
  .bento .gas-tile--flagship {
    flex-direction: row;
    align-items: center;
  }
  .bento .gas-tile--flagship .gas-tile__media { width: 64px; flex: none; }
  .advantages { grid-template-columns: 1fr; }
  .spheres { grid-template-columns: 1fr; }
  .docs { grid-template-columns: 1fr; }
  /* Кнопки — на всю ширину и в столбик */
  .hero__actions,
  .page-hero__actions { flex-direction: column; align-items: stretch; }
  .hero__actions .btn,
  .page-hero__actions .btn { width: 100%; text-align: center; justify-content: center; }
  /* Отзывы — горизонтальный слайдер */
  .reviews {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    gap: var(--space-sm);
    padding-bottom: var(--space-xs);
  }
  .reviews::-webkit-scrollbar { display: none; }
  .reviews > * {
    flex: 0 0 88%;
    scroll-snap-align: start;
    min-width: 0;
  }
}