/* ============================================================
   АЗОТМОСГАЗ · style.css · Industrial Slate + Copper
   ============================================================ */

/* ─── Сброс ─── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

/* ─── Токены ─── */
:root {
  /* Slate */
  --slate-900:    #0F1923;
  --slate-800:    #1A2735;
  --slate-700:    #253545;
  --slate-200:    #D8DEE4;
  --slate-100:    #E9EDF2;
  --slate-50:     #F4F6F8;

  /* Copper */
  --copper:       #D4783A;
  --copper-dark:  #B8622A;
  --copper-soft:  #FDF3EB;
  --copper-glow:  rgba(212, 120, 58, 0.15);

  /* Текст */
  --text:              #1A1A1A;
  --text-soft:         #5B6E7E;
  --text-muted:        #8A9BA8;
  --text-on-dark:      #FFFFFF;
  --text-on-dark-soft: rgba(255,255,255,0.7);

  /* Фоны */
  --bg:       #FFFFFF;
  --bg-soft:  #F4F6F8;
  --bg-input: #F8F9FA;

  /* Границы */
  --border:       #D8DEE4;
  --border-input: #C5CDD5;

  /* Ошибка */
  --error:      #CD3D3D;
  --error-tint: #FDEDED;

  /* Тени */
  --shadow-sm: 0 1px 2px rgba(15,25,35,0.06);
  --shadow-md: 0 4px 12px rgba(15,25,35,0.08);
  --shadow-lg: 0 12px 40px rgba(15,25,35,0.12);
  --shadow-xl: 0 20px 60px rgba(15,25,35,0.16);

  /* Типографика */
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Montserrat', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Скругления */
  --r-sm: 4px;
  --r:    8px;
  --r-lg: 14px;
  --r-xl: 20px;

  /* Сетка */
  --container: 1264px;
  --gutter:    32px;
}

/* ─── База ─── */
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
.icon-sprite { display: none; }

/* ─── Контейнер ─── */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ─── Секции ─── */
.section        { padding: 72px 0; }
.section--soft  { background: var(--bg-soft); }
.section--dark  { background: var(--slate-900); color: var(--text-on-dark); }

.section__header { margin-bottom: 40px; }
.section__title {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  line-height: 1.15;
  color: inherit;
  margin-bottom: 32px;
}
.section__header .section__title { margin-bottom: 0; }
.section__title--spaced { margin-top: 48px; }
.section--dark .section__title { color: var(--text-on-dark); }
.section__lede {
  margin-top: 12px;
  font-size: 16px;
  color: var(--text-soft);
  max-width: 560px;
}
.section--dark .section__lede { color: var(--text-on-dark-soft); }

/* ─── Типографика ─── */
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.15; }

/* ============================================================
   КОМПОНЕНТЫ
   ============================================================ */

/* ─── Кнопки ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 50px;
  padding: 0 28px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  border: none;
  border-radius: var(--r);
  cursor: pointer;
  white-space: nowrap;
  transition: background .25s, color .25s, box-shadow .25s;
  text-decoration: none;
}
.btn--primary { background: var(--copper); color: #fff; }
.btn--primary:hover { background: var(--copper-dark); }

.btn--outline {
  background: transparent;
  color: var(--text);
  box-shadow: inset 0 0 0 2px var(--border);
}
.btn--outline:hover { box-shadow: inset 0 0 0 2px var(--copper); color: var(--copper); }

.btn--ghost {
  background: transparent;
  color: var(--copper);
  box-shadow: inset 0 0 0 2px var(--copper);
}
.btn--ghost:hover { background: var(--copper); color: #fff; }

.btn--sm { height: 38px; padding: 0 20px; font-size: 13px; }
.btn--lg { height: 58px; padding: 0 36px; font-size: 16px; }
.btn--full { width: 100%; }

/* Loading state */
.btn--loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}
.btn--loading::after {
  content: '';
  position: absolute;
  inset: 0;
  margin: auto;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.35);
  border-top-color: #fff;
  animation: spin .8s linear infinite;
}
.btn--outline.btn--loading::after,
.btn--ghost.btn--loading::after {
  border-color: rgba(212,120,58,0.3);
  border-top-color: var(--copper);
}

/* Кнопки на тёмном фоне */
.btn--on-dark.btn--outline {
  color: rgba(255,255,255,0.8);
  box-shadow: inset 0 0 0 2px rgba(255,255,255,0.2);
}
.btn--on-dark.btn--outline:hover {
  box-shadow: inset 0 0 0 2px var(--copper);
  color: var(--copper);
}

/* ─── Бейджи ─── */
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.badge--copper { background: var(--copper); color: #fff; }
.badge--slate  { background: var(--slate-100); color: var(--slate-700); }

/* ─── Карточка товара ─── */
.product-card {
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--bg);
  border: 1px solid var(--slate-100);
  box-shadow: var(--shadow-sm);
  transition: box-shadow .3s, transform .3s;
}
.product-card:hover {
  box-shadow: 0 8px 32px rgba(212,120,58,0.12), var(--shadow-md);
  transform: translateY(-3px);
}
.product-card__img {
  height: 180px;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  position: relative;
}
.product-card__img-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: var(--copper);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 4px;
  z-index: 1;
}
.product-card__img img { width: 100%; height: 100%; object-fit: cover; }
.product-card__body { padding: 16px; }
.product-card__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16px;
  margin: 8px 0 12px;
}
.product-card__price-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
  font-size: 13px;
  border-bottom: 1px solid var(--slate-100);
}
.product-card__price-row:last-of-type { border-bottom: none; }
.product-card__price-label { color: var(--text-soft); }
.product-card__price-value {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--copper);
}
.product-card__price-value--exchange { font-size: 15px; color: var(--text); }
.product-card__actions { margin-top: 12px; }

/* ─── Каталог-грид ─── */
.catalog-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

/* ─── Форм-элементы ─── */
.label {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 13px;
  color: var(--text);
  margin-bottom: 6px;
}
.label__required { color: var(--copper); margin-left: 3px; }
.label__hint { font-weight: 400; color: var(--text-soft); font-size: 12px; margin-left: 6px; }

.input {
  width: 100%;
  height: 44px;
  padding: 0 14px;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--text);
  background: var(--bg-input);
  border: 1.5px solid var(--border-input);
  border-radius: var(--r);
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}
.input::placeholder { color: var(--text-muted); }
.input:hover { border-color: var(--text-soft); }
.input:focus {
  border-color: var(--copper);
  box-shadow: 0 0 0 3px var(--copper-glow);
  background: #fff;
}
.input:disabled {
  background: var(--slate-50);
  color: var(--text-muted);
  cursor: not-allowed;
  border-color: var(--border);
}
.input--error { border-color: var(--error); background: var(--error-tint); }
.input--error:focus { box-shadow: 0 0 0 3px rgba(205,61,61,0.12); }

textarea.input {
  height: auto;
  min-height: 100px;
  padding: 12px 14px;
  resize: vertical;
  line-height: 1.6;
}

.select-wrap { position: relative; }
.select-wrap .input {
  padding-right: 38px;
  appearance: none;
  cursor: pointer;
}
.select-wrap::after {
  content: '';
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 0; height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid var(--text-soft);
  pointer-events: none;
}

.form-group { margin-bottom: 18px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field-error { display: block; font-size: 12px; color: var(--error); margin-top: 5px; }
.field-hint  { display: block; font-size: 12px; color: var(--text-soft); margin-top: 5px; }

/* Чекбокс / радио */
.checkbox-wrap, .radio-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: 14px;
  user-select: none;
}
.checkbox-wrap input[type="checkbox"],
.radio-wrap input[type="radio"] { display: none; }
.checkbox-wrap .check-box {
  width: 18px; height: 18px;
  border: 1.5px solid var(--border-input);
  border-radius: 4px;
  background: var(--bg-input);
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  transition: border-color .2s, background .2s;
}
.checkbox-wrap input:checked + .check-box { background: var(--copper); border-color: var(--copper); }
.checkbox-wrap input:checked + .check-box::after {
  content: '';
  width: 10px; height: 6px;
  border-left: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(-45deg) translateY(-1px);
}
.radio-wrap .radio-dot {
  width: 18px; height: 18px;
  border: 1.5px solid var(--border-input);
  border-radius: 50%;
  background: var(--bg-input);
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  transition: border-color .2s;
}
.radio-wrap input:checked + .radio-dot { border-color: var(--copper); }
.radio-wrap input:checked + .radio-dot::after {
  content: '';
  width: 8px; height: 8px;
  background: var(--copper);
  border-radius: 50%;
}

/* ─── Аккордеон ─── */
.accordion { border: 1.5px solid var(--border); border-radius: var(--r-lg); overflow: hidden; }
.accordion-item { border-bottom: 1px solid var(--border); }
.accordion-item:last-child { border-bottom: none; }
.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  color: var(--text);
  text-align: left;
  transition: background .2s, color .2s;
  gap: 12px;
}
.accordion-trigger:hover { background: var(--slate-50); color: var(--copper); }
.accordion-trigger.active { color: var(--copper); }
.accordion-icon {
  width: 20px; height: 20px;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-soft);
  transition: transform .3s, color .2s;
}
.accordion-trigger.active .accordion-icon { transform: rotate(180deg); color: var(--copper); }
.accordion-content { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.accordion-content.open { max-height: 600px; }
.accordion-content__inner { padding: 4px 20px 18px; font-size: 14px; color: var(--text-soft); line-height: 1.7; }
.accordion-content__inner p + p { margin-top: 10px; }

/* ─── Текстовые ссылки внутри контента ─── */
.text-link {
  color: var(--copper);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.text-link:hover { color: var(--copper-dark); }

/* ─── Табы ─── */
.tabs-list {
  display: flex;
  gap: 2px;
  background: var(--slate-50);
  border: 1.5px solid var(--border);
  border-radius: var(--r-lg);
  padding: 4px;
  width: fit-content;
}
.tabs-trigger {
  padding: 8px 20px;
  border: none;
  background: none;
  border-radius: calc(var(--r-lg) - 4px);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 13px;
  color: var(--text-soft);
  cursor: pointer;
  transition: background .2s, color .2s, box-shadow .2s;
  white-space: nowrap;
}
.tabs-trigger:hover { color: var(--text); }
.tabs-trigger.active { background: #fff; color: var(--copper); box-shadow: var(--shadow-sm); }
.tabs-content { display: none; padding: 20px 0; }
.tabs-content.active { display: block; }

/* Line-вариант */
.tabs-list--line {
  background: none; border: none;
  border-bottom: 2px solid var(--border);
  border-radius: 0; padding: 0;
  width: 100%; gap: 0;
}
.tabs-list--line .tabs-trigger {
  border-radius: 0; padding: 10px 20px;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
}
.tabs-list--line .tabs-trigger.active {
  background: none; box-shadow: none;
  color: var(--copper); border-bottom-color: var(--copper);
}

/* ─── Диалог / Модал ─── */
.dialog-overlay {
  position: fixed; inset: 0;
  background: rgba(15,25,35,0.6);
  backdrop-filter: blur(3px);
  z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  padding: 16px;
  opacity: 0; pointer-events: none;
  transition: opacity .25s;
}
.dialog-overlay.open { opacity: 1; pointer-events: all; }
.dialog {
  background: #fff;
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-xl);
  width: 100%; max-width: 480px;
  padding: 32px;
  position: relative;
  transform: translateY(12px) scale(0.98);
  transition: transform .3s;
}
.dialog-overlay.open .dialog { transform: translateY(0) scale(1); }
.dialog-close {
  position: absolute; top: 16px; right: 16px;
  width: 32px; height: 32px;
  border-radius: 50%; border: none;
  background: var(--slate-50);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-soft); font-size: 18px; line-height: 1;
  transition: background .2s, color .2s;
}
.dialog-close:hover { background: var(--copper-soft); color: var(--copper); }
.dialog-title { font-family: var(--font-display); font-weight: 700; font-size: 20px; margin-bottom: 6px; padding-right: 40px; }
.dialog-phone {
  display: block; font-family: var(--font-display); font-weight: 800;
  font-size: 26px; color: var(--copper); text-decoration: none;
  margin-bottom: 8px; letter-spacing: -0.5px; transition: color .2s;
}
.dialog-phone:hover { color: var(--copper-dark); }
.dialog-desc { font-size: 14px; color: var(--text-soft); margin-bottom: 24px; }
.dialog-footer {
  display: flex; gap: 10px; justify-content: flex-end;
  margin-top: 24px; padding-top: 20px;
  border-top: 1px solid var(--border);
}

/* ─── Alert ─── */
.alert {
  display: flex; gap: 12px;
  padding: 14px 16px;
  border-radius: var(--r);
  border: 1.5px solid;
  font-size: 14px; line-height: 1.5;
}
.alert__icon { flex-shrink: 0; margin-top: 1px; width: 18px; height: 18px; }
.alert__title { font-family: var(--font-display); font-weight: 600; font-size: 13px; margin-bottom: 3px; }
.alert__text { font-size: 13px; }
.alert--info    { background: #EFF6FF; border-color: #BFDBFE; color: #1E40AF; }
.alert--info .alert__title { color: #1E3A8A; }
.alert--success { background: var(--copper-soft); border-color: #F0C9A0; color: #7A3F10; }
.alert--success .alert__title { color: #6B3410; }
.alert--error   { background: var(--error-tint); border-color: #FECACA; color: #991B1B; }
.alert--error .alert__title { color: #7F1D1D; }
.alert--warning { background: #FFFBEB; border-color: #FDE68A; color: #92400E; }
.alert--warning .alert__title { color: #78350F; }

/* ─── Toast ─── */
.toast-container {
  position: fixed; bottom: 24px; right: 24px;
  display: flex; flex-direction: column; gap: 10px;
  z-index: 2000; pointer-events: none;
}
.toast {
  min-width: 300px; max-width: 400px;
  background: var(--slate-900); color: #fff;
  border-radius: var(--r-lg);
  padding: 14px 16px;
  box-shadow: var(--shadow-lg);
  display: flex; align-items: flex-start; gap: 12px;
  pointer-events: all;
  transform: translateX(120%);
  transition: transform .35s cubic-bezier(.34,1.56,.64,1);
}
.toast.show { transform: translateX(0); }
.toast__icon { flex-shrink: 0; width: 20px; height: 20px; margin-top: 1px; }
.toast__body { flex: 1; }
.toast__title { font-family: var(--font-display); font-weight: 600; font-size: 14px; margin-bottom: 2px; }
.toast__text  { font-size: 13px; color: rgba(255,255,255,0.7); }
.toast__close { flex-shrink: 0; background: none; border: none; color: rgba(255,255,255,0.5); font-size: 18px; cursor: pointer; line-height: 1; padding: 0; }
.toast__close:hover { color: #fff; }
.toast--success .toast__icon { color: #4ADE80; }
.toast--error   .toast__icon { color: #F87171; }
.toast--info    .toast__icon { color: var(--copper); }

/* ─── Спиннер ─── */
.spinner {
  display: inline-block;
  width: 24px; height: 24px;
  border: 3px solid rgba(212,120,58,0.2);
  border-top-color: var(--copper);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}
.spinner--sm  { width: 16px; height: 16px; border-width: 2px; }
.spinner--lg  { width: 40px; height: 40px; border-width: 4px; }
.spinner--white { border-color: rgba(255,255,255,0.25); border-top-color: #fff; }

@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Skeleton ─── */
.skeleton {
  background: linear-gradient(90deg, var(--slate-100) 25%, var(--slate-50) 50%, var(--slate-100) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--r-sm);
}
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* ─── Tooltip ─── */
.tooltip-wrap { position: relative; display: inline-flex; }
.tooltip-tip {
  position: absolute;
  bottom: calc(100% + 8px); left: 50%;
  transform: translateX(-50%);
  background: var(--slate-900); color: #fff;
  font-size: 12px; white-space: nowrap;
  padding: 6px 10px; border-radius: var(--r-sm);
  pointer-events: none; opacity: 0;
  transition: opacity .2s; z-index: 100;
}
.tooltip-tip::after {
  content: '';
  position: absolute; top: 100%; left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--slate-900);
}
.tooltip-wrap:hover .tooltip-tip { opacity: 1; }

/* ─── Breadcrumb ─── */
.breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: 4px; font-size: 13px; color: var(--text-soft); }
.breadcrumb a { color: var(--text-soft); text-decoration: none; transition: color .2s; }
.breadcrumb a:hover { color: var(--copper); text-decoration: underline; }
.breadcrumb__sep { color: var(--text-muted); margin: 0 2px; user-select: none; }
.breadcrumb__current { color: var(--text); font-weight: 500; }

/* ─── Таблица данных ─── */
.data-table { width: 100%; border-collapse: collapse; font-size: 14px; border: 1.5px solid var(--border); border-radius: var(--r-lg); overflow: hidden; }
.data-table th {
  background: var(--slate-900); color: rgba(255,255,255,0.8);
  font-family: var(--font-display); font-weight: 600;
  font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em;
  padding: 12px 16px; text-align: left;
}
.data-table td { padding: 12px 16px; border-bottom: 1px solid var(--border); color: var(--text); }
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:nth-child(even) td { background: var(--slate-50); }
.data-table .price { font-family: var(--font-display); font-weight: 700; color: var(--copper); }
.data-table .price-exchange { font-family: var(--font-display); font-weight: 600; color: var(--text-soft); font-size: 13px; }

/* ─── Header ─── */
.site-header {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 900;
  background: var(--slate-900);
  transition: box-shadow .3s, padding .3s;
}
.site-header.scrolled { box-shadow: var(--shadow-lg); }

.site-header__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  height: 68px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
  transition: height .3s;
}
.site-header.scrolled .site-header__inner { height: 56px; }

.site-header__logo {
  font-family: var(--font-display);
  font-weight: 800; font-size: 18px;
  color: #fff; text-decoration: none;
  letter-spacing: -0.01em; flex-shrink: 0;
}
.site-header__logo span { color: var(--copper); }

.site-header__nav { display: flex; align-items: center; gap: 4px; }
.site-header__nav a {
  font-family: var(--font-display);
  font-weight: 600; font-size: 12px;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  white-space: nowrap;
  padding: 8px 12px; border-radius: var(--r-sm);
  transition: color .2s, background .2s;
}
.site-header__nav a:hover { color: #fff; background: rgba(255,255,255,0.08); }
.site-header__nav a.active { color: var(--copper); }

.site-header__actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
/* Запрет переноса всех телефонных ссылок */
a[href^="tel:"] { white-space: nowrap; }

.header-phone { font-family: var(--font-display); font-weight: 600; font-size: 13px; color: rgba(255,255,255,0.85); text-decoration: none; }
.header-phone:hover { color: var(--copper); }

/* Бургер */
.burger {
  display: none; flex-direction: column;
  justify-content: center; gap: 5px;
  width: 36px; height: 36px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.burger span { display: block; height: 2px; background: #fff; border-radius: 2px; transition: transform .3s, opacity .3s; }
.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Мобильное меню */
.mobile-nav {
  display: none; flex-direction: column;
  background: var(--slate-800);
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 8px 0 16px;
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  font-family: var(--font-display);
  font-weight: 600; font-size: 14px;
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  padding: 12px var(--gutter);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: color .2s;
}
.mobile-nav a:last-child { border-bottom: none; }
.mobile-nav a:hover { color: var(--copper); }
.mobile-nav__phone { color: var(--copper) !important; }

/* Отступ под фиксированный хедер */
.header-offset { padding-top: 68px; }

/* ─── Footer ─── */
.site-footer {
  background: var(--slate-900);
  color: var(--text-on-dark-soft);
  padding: 56px 0 32px;
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand__logo { font-family: var(--font-display); font-weight: 800; font-size: 20px; color: #fff; margin-bottom: 12px; }
.footer-brand__logo span { color: var(--copper); }
.footer-brand__desc { font-size: 13px; line-height: 1.6; margin-bottom: 16px; }
.footer-brand__phone { display: block; font-family: var(--font-display); font-weight: 700; font-size: 18px; color: #fff; text-decoration: none; margin-bottom: 4px; }
.footer-brand__phone:hover { color: var(--copper); }

.footer-col__title { font-family: var(--font-display); font-weight: 700; font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; color: rgba(255,255,255,0.5); margin-bottom: 16px; }
.footer-col a { display: block; font-size: 13px; color: rgba(255,255,255,0.7); text-decoration: none; margin-bottom: 10px; transition: color .2s; }
.footer-col a:hover { color: var(--copper); }

.site-footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 24px; font-size: 12px; color: var(--text-muted);
  flex-wrap: wrap;
}
.footer-disclaimer { max-width: 600px; line-height: 1.6; }
.footer-requisites { text-align: right; line-height: 1.8; }

/* ============================================================
   КОМПОНЕНТЫ ГЛАВНОЙ СТРАНИЦЫ
   ============================================================ */

/* ─── Hero: двухколоночная раскладка ─── */
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 36px 36px;
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute; right: 0; top: 0; bottom: 0; width: 50%;
  background: radial-gradient(ellipse at 80% 40%, rgba(212,120,58,0.07) 0%, transparent 65%);
  pointer-events: none;
}
.hero__container {
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 64px;
  align-items: center;
}
.hero__kicker {
  font-family: var(--font-display);
  font-weight: 600; font-size: 12px;
  text-transform: uppercase; letter-spacing: 0.09em;
  color: var(--copper);
  margin-bottom: 22px;
}
.hero__facts {
  display: flex; gap: 40px;
  margin-top: 52px; padding-top: 28px;
  border-top: 1px solid rgba(255,255,255,0.1);
  flex-wrap: wrap;
}
.hero__fact-num {
  display: block;
  font-family: var(--font-display);
  font-size: 30px; font-weight: 800;
  color: #fff; line-height: 1;
}
.hero__fact-label { display: block; font-size: 12px; color: rgba(255,255,255,0.45); margin-top: 5px; }

/* ─── Gas tiles (hero right) ─── */
.gas-tiles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.gas-tile {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--r-lg);
  padding: 20px 18px 16px;
  text-decoration: none;
  display: block;
  transition: background .25s, border-color .25s, transform .25s;
}
.gas-tile:hover {
  background: rgba(212,120,58,0.1);
  border-color: rgba(212,120,58,0.3);
  transform: translateY(-3px);
}
.gas-tile--wide {
  grid-column: 1 / -1;
  display: flex; align-items: center; gap: 16px;
  padding: 16px 18px;
}
.gas-tile--wide .gas-tile__symbol { margin-bottom: 0; }
.gas-tile__symbol {
  font-family: var(--font-display);
  font-size: 32px; font-weight: 800;
  color: var(--copper);
  line-height: 1; margin-bottom: 10px;
  letter-spacing: -0.02em;
}
.gas-tile__name { font-family: var(--font-display); font-weight: 600; font-size: 14px; color: #fff; margin-bottom: 3px; }
.gas-tile__tag { font-size: 11px; color: rgba(255,255,255,0.4); }

/* ─── Gas cards (catalog section) ─── */
.gas-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}
.gas-card {
  background: var(--slate-800);
  background-size: cover;
  background-position: center;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 24px 20px 20px;
  display: flex; flex-direction: column;
  position: relative;
  overflow: hidden;
  transition: box-shadow .3s, transform .3s;
}
.gas-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(15, 25, 35, 0.52);
  border-radius: inherit;
  pointer-events: none;
  z-index: 0;
}
.gas-card > * { position: relative; z-index: 1; }
.gas-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.gas-card__symbol {
  font-family: var(--font-display);
  font-size: 38px; font-weight: 800;
  color: var(--copper);
  line-height: 1; margin-bottom: 12px;
  letter-spacing: -0.02em;
}
.gas-card__name { font-family: var(--font-display); font-weight: 700; font-size: 17px; color: #fff; margin-bottom: 4px; }
.gas-card__badges { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 10px; }
.gas-card__desc { font-size: 12px; color: rgba(255,255,255,0.65); line-height: 1.55; margin-bottom: 12px; flex: 1; }
.gas-card__volumes { font-size: 11px; color: rgba(255,255,255,0.45); font-family: var(--font-display); font-weight: 500; margin-bottom: 14px; }
.gas-card__price { margin-bottom: 16px; }
.gas-card__price-from { font-size: 12px; color: rgba(255,255,255,0.55); }
.gas-card__price-value { font-family: var(--font-display); font-weight: 700; font-size: 22px; color: var(--copper); margin-left: 4px; }
.gas-card__actions { display: flex; flex-direction: column; gap: 8px; margin-top: auto; }
.gas-card .btn--outline {
  border-color: rgba(255,255,255,0.35);
  color: rgba(255,255,255,0.85);
  background: transparent;
}
.gas-card .btn--outline:hover {
  border-color: var(--copper);
  color: var(--copper);
  background: rgba(212,120,58,0.1);
}

/* ─── Benefits ─── */
.benefits-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.catalog-actions {
  margin-top: 32px;
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}
.benefit-item__icon {
  width: 56px; height: 56px;
  background: var(--copper-soft);
  border-radius: var(--r-lg);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px; color: var(--copper);
}
.benefit-item__title { font-family: var(--font-display); font-weight: 700; font-size: 18px; color: var(--text); margin-bottom: 10px; }
.benefit-item__text { font-size: 14px; color: var(--text-soft); line-height: 1.7; }

/* ─── Steps ─── */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px; position: relative;
}
.steps-grid::before {
  content: '';
  position: absolute;
  top: 24px; left: 48px; right: 48px; height: 2px;
  background: var(--slate-100); z-index: 0;
}
.step { position: relative; z-index: 1; }
.step__num {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--copper); color: #fff;
  font-family: var(--font-display); font-weight: 800; font-size: 18px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px; flex-shrink: 0;
  box-shadow: 0 0 0 6px var(--bg-soft);
}
.step__title { font-family: var(--font-display); font-weight: 600; font-size: 15px; color: var(--text); margin-bottom: 8px; }
.step__text { font-size: 13px; color: var(--text-soft); line-height: 1.65; }

/* ─── Delivery rules ─── */
.delivery-rules {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.delivery-rule {
  position: relative;
  min-height: 260px;
  background: var(--bg);
  border: 1px solid var(--slate-100);
  border-radius: var(--r-lg);
  padding: 22px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow .25s, transform .25s;
}
.delivery-rule:hover {
  box-shadow: 0 8px 32px rgba(212,120,58,0.12), var(--shadow-md);
  transform: translateY(-2px);
}
.delivery-rule::after {
  content: attr(data-mark);
  position: absolute;
  right: -8px;
  bottom: -18px;
  font-family: var(--font-display);
  font-size: 86px;
  font-weight: 800;
  line-height: 1;
  color: rgba(212,120,58,0.06);
  pointer-events: none;
}
.delivery-rule__num {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.delivery-rule__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--r);
  background: var(--copper-soft);
  color: var(--copper);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.delivery-rule__title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text);
  margin-bottom: 10px;
}
.delivery-rule__text {
  font-size: 13px;
  color: var(--text-soft);
  line-height: 1.65;
}
.delivery-rule--accent {
  background: var(--slate-900);
  color: #fff;
}
.delivery-rule--accent .delivery-rule__num { color: rgba(255,255,255,0.38); }
.delivery-rule--accent .delivery-rule__icon {
  background: rgba(212,120,58,0.16);
  color: var(--copper);
}
.delivery-rule--accent .delivery-rule__title { color: #fff; }
.delivery-rule--accent .delivery-rule__text { color: rgba(255,255,255,0.68); }
.delivery-rule--accent .text-link { color: #fff; }
.delivery-rule--accent .text-link:hover { color: var(--copper); }

/* ─── Article cards ─── */
.articles-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.article-card {
  border-radius: var(--r-lg); overflow: hidden;
  border: 1px solid var(--slate-100);
  box-shadow: var(--shadow-sm);
  background: var(--bg);
  transition: box-shadow .3s, transform .3s;
  text-decoration: none; color: inherit;
  display: flex; flex-direction: column;
}
.article-card { transition: box-shadow .3s, transform .3s; }
.article-card:hover { box-shadow: 0 8px 32px rgba(212,120,58,0.12), var(--shadow-md); transform: translateY(-3px); }
.article-card__thumb {
  height: 156px;
  background: var(--slate-900);
  display: flex; align-items: center; justify-content: center;
  border-bottom: 1px solid var(--border);
  overflow: hidden; position: relative;
}
.article-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .35s ease;
}
.article-card:hover .article-card__thumb img { transform: scale(1.04); }
.article-card__thumb-icon {
  font-family: var(--font-display);
  font-size: 48px; font-weight: 800;
  color: rgba(255,255,255,0.06);
  letter-spacing: -0.02em;
  user-select: none;
}
.article-card__thumb-tag {
  position: absolute; bottom: 12px; left: 12px;
}
.article-card__body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.article-card__meta { font-size: 12px; color: var(--text-muted); margin-bottom: 10px; }
.article-card__title {
  font-family: var(--font-display); font-weight: 600; font-size: 15px;
  line-height: 1.45; color: var(--text);
  margin-bottom: 10px; flex: 1;
  transition: color .2s;
}
.article-card:hover .article-card__title { color: var(--copper); }
.article-card__desc { font-size: 13px; color: var(--text-soft); line-height: 1.6; }

/* ─── Article cover ─── */
.article-cover {
  margin-bottom: 36px;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  background: var(--slate-900);
}
.article-cover img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* ─── Article typography ─── */
.article-section {
  background:
    linear-gradient(180deg, var(--bg-soft) 0%, #fff 100%);
}
.article-section .container { max-width: 924px; }
.article-section .content-block {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
  padding: 40px;
}
.content-block h2 {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
  margin: 42px 0 14px;
  padding-top: 6px;
}
.content-block h2:first-child,
.content-block .article-cover + h2 {
  margin-top: 0;
  padding-top: 0;
}
.content-block h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text);
  margin: 28px 0 10px;
}
.content-block p {
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-soft);
  margin: 0 0 16px;
}
.content-block strong {
  color: var(--text);
  font-weight: 700;
}
.content-block ul,
.content-block ol {
  margin: 16px 0 24px;
  padding: 0;
  list-style: none;
}
.content-block li {
  position: relative;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-soft);
  padding-left: 28px;
  margin-bottom: 10px;
}
.content-block ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--copper);
}
.content-block ol {
  counter-reset: article-list;
}
.content-block ol li {
  counter-increment: article-list;
  padding-left: 40px;
}
.content-block ol li::before {
  content: counter(article-list);
  position: absolute;
  left: 0;
  top: 0.1em;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--copper-soft);
  color: var(--copper);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 12px;
}
.content-block .price-table-wrap,
.content-block .info-card {
  margin: 20px 0 30px;
}
.content-block .price-table {
  min-width: 680px;
}

/* ─── CTA strip ─── */
.cta-strip { background: var(--copper); padding: 56px 0; }
.cta-strip__inner {
  display: flex; align-items: center;
  justify-content: space-between; gap: 40px;
}
.cta-strip__title { font-family: var(--font-display); font-weight: 800; font-size: 26px; color: #fff; max-width: 480px; line-height: 1.25; }
.cta-strip__sub { font-size: 15px; color: rgba(255,255,255,0.8); margin-top: 8px; }
.cta-strip__actions { display: flex; gap: 12px; align-items: center; flex-shrink: 0; }
.btn--on-copper { background: rgba(255,255,255,0.18); color: #fff; box-shadow: none; }
.btn--on-copper:hover { background: rgba(255,255,255,0.28); color: #fff; }

/* ─── Hero ─── */
.hero {
  background:
    linear-gradient(
      105deg,
      rgba(15,25,35,0.96) 0%,
      rgba(15,25,35,0.93) 42%,
      rgba(15,25,35,0.70) 68%,
      rgba(15,25,35,0.50) 100%
    ),
    url('/images/hero/hero-bg.webp') 55% center / cover no-repeat;
  color: #fff;
  padding: 100px 0 80px;
  position: relative;
  overflow: hidden;
}
.hero__inner {
  position: relative; z-index: 1;
  max-width: 640px;
}
.hero__title {
  font-family: var(--font-display);
  font-size: 52px; font-weight: 800;
  line-height: 1.08; letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.hero__title .accent { color: var(--copper); }
.hero__subtitle { font-size: 17px; color: rgba(255,255,255,0.7); margin-bottom: 36px; line-height: 1.6; }
.hero__actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero__badges { display: flex; gap: 24px; margin-top: 48px; flex-wrap: wrap; }
.hero__badge { display: flex; align-items: center; gap: 8px; font-size: 13px; color: rgba(255,255,255,0.6); }
.hero__badge svg { color: var(--copper); flex-shrink: 0; }

/* ─── Анимации при скролле ─── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.visible { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: .1s; }
.reveal-delay-2 { transition-delay: .2s; }
.reveal-delay-3 { transition-delay: .3s; }
.reveal-delay-4 { transition-delay: .4s; }

/* ─── Кнопки на медной полосе CTA ─── */
.cta-strip .btn--primary {
  background: #fff;
  color: var(--copper-dark);
  box-shadow: none;
}
.cta-strip .btn--primary:hover {
  background: rgba(255, 255, 255, 0.9);
  color: var(--copper-dark);
}

/* ─── Outline-кнопка на тёмном фоне ─── */
.hero .btn--outline,
.page-hero .btn--outline,
.section--dark .btn--outline,
.cta-strip .btn--outline {
  color: rgba(255, 255, 255, 0.9);
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.3);
}
.hero .btn--outline:hover,
.page-hero .btn--outline:hover,
.section--dark .btn--outline:hover,
.cta-strip .btn--outline:hover {
  color: var(--copper);
  box-shadow: inset 0 0 0 2px var(--copper);
}

/* ─── Прочие утилиты ─── */
.text-copper { color: var(--copper); }
.text-soft   { color: var(--text-soft); }
.text-muted  { color: var(--text-muted); }
hr { border: none; border-top: 1px solid var(--border); }

/* ============================================================
   КОМПОНЕНТЫ СТРАНИЦ ГАЗА
   ============================================================ */

/* ─── Page Hero (внутренние страницы) ─── */
.page-hero {
  background: var(--slate-900);
  color: #fff;
  padding: 56px 0 52px;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 36px 36px;
  pointer-events: none;
}
.page-hero__inner { position: relative; z-index: 1; }
.page-hero__symbol {
  position: absolute;
  right: var(--gutter);
  top: 50%; transform: translateY(-50%);
  font-family: var(--font-display);
  font-size: 200px; font-weight: 800;
  color: rgba(255,255,255,0.04);
  line-height: 1;
  letter-spacing: -0.04em;
  user-select: none;
  pointer-events: none;
  z-index: 0;
}
.page-hero__title {
  font-family: var(--font-display);
  font-size: 42px; font-weight: 800;
  line-height: 1.1; letter-spacing: -0.02em;
  margin-bottom: 14px;
}
.page-hero__title .accent { color: var(--copper); }
.page-hero__sub { font-size: 16px; color: rgba(255,255,255,0.65); max-width: 560px; line-height: 1.65; margin-bottom: 28px; }
.page-hero__actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ─── Azot hero — фото фон ─── */
.page-hero--azot {
  background:
    linear-gradient(to right,
      rgba(15,25,35,0.98) 0%,
      rgba(15,25,35,0.96) 36%,
      rgba(15,25,35,0.72) 56%,
      rgba(15,25,35,0.18) 78%,
      rgba(15,25,35,0.04) 100%
    ),
    url('/images/hero/hero-azot.webp') right center / cover no-repeat;
}
.page-hero--azot .page-hero__symbol { display: none; }

/* ─── Breadcrumb ─── */
.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-size: 12px; color: rgba(255,255,255,0.4);
  margin-bottom: 22px; flex-wrap: wrap;
}
.breadcrumb__sep { color: rgba(255,255,255,0.2); }
.breadcrumb a { color: rgba(255,255,255,0.4); transition: color .2s; }
.breadcrumb a:hover { color: var(--copper); }
.breadcrumb__current { color: rgba(255,255,255,0.65); }

/* ─── Gas page 2-col grid ─── */
.gas-page-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 56px;
  align-items: start;
}

/* ─── Application list ─── */
.subsection-title {
  font-family: var(--font-display); font-weight: 700; font-size: 20px;
  color: var(--text); margin-bottom: 20px; margin-top: 36px;
}
.subsection-title:first-child { margin-top: 0; }

.app-list { list-style: none; }
.app-list li {
  padding: 11px 0 11px 28px;
  position: relative;
  font-size: 14px; color: var(--text-soft);
  border-bottom: 1px solid var(--border);
  line-height: 1.5;
}
.app-list li:last-child { border-bottom: none; }
.app-list li::before {
  content: '';
  position: absolute; left: 0; top: 19px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--copper);
}

/* ─── Sidebar info cards ─── */
.info-card {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 22px;
}
.info-card + .info-card { margin-top: 16px; }
.info-card__title {
  font-family: var(--font-display); font-weight: 700; font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.07em;
  color: var(--text-muted); margin-bottom: 14px;
}
.info-card__list { list-style: none; }
.info-card__list li {
  font-size: 13px; color: var(--text-soft);
  padding: 7px 0;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: flex-start; gap: 10px;
  line-height: 1.5;
}
.info-card__list li:last-child { border-bottom: none; }
.info-card__list li::before {
  content: '✓';
  color: var(--copper); font-weight: 700; flex-shrink: 0;
  margin-top: 1px;
}
.info-card__action { margin-top: 18px; }
.info-card__note { font-size: 12px; color: var(--text-muted); margin-top: 10px; line-height: 1.5; }

/* ─── Certificates page ─── */
.cert-docs-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
.cert-doc-card {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  border: 1px solid var(--slate-100);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
  padding: 20px;
  transition: box-shadow 0.22s, transform 0.22s;
}
.cert-doc-card:hover {
  box-shadow: 0 8px 32px rgba(212,120,58,0.12), var(--shadow-md);
  transform: translateY(-2px);
}
.cert-doc-card__head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
}
.cert-doc-card__icon {
  width: 42px;
  height: 42px;
  border-radius: var(--r);
  background: var(--copper-soft);
  color: var(--copper);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.cert-doc-card--muted .cert-doc-card__icon {
  background: var(--bg-soft);
  color: var(--text-muted);
}
.cert-doc-card__kicker {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 13px;
  color: var(--copper);
  line-height: 1;
  margin-bottom: 6px;
}
.cert-doc-card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
  line-height: 1.25;
  margin: 0;
}
.cert-doc-card__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 9px;
  margin: 0 0 18px;
  padding: 0;
}
.cert-doc-card__list li {
  position: relative;
  padding-left: 18px;
  font-size: 13px;
  color: var(--text-soft);
  line-height: 1.55;
}
.cert-doc-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--copper);
}
.cert-doc-card--muted .cert-doc-card__list li::before { background: var(--text-muted); }
.cert-doc-card__action {
  margin-top: auto;
  align-self: flex-start;
}
.cert-doc-card__note {
  margin-top: auto;
  font-size: 12px;
  line-height: 1.5;
  color: var(--text-muted);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 10px 12px;
}

/* ─── Price table ─── */
.price-table-wrap { overflow-x: auto; border-radius: var(--r-lg); border: 1px solid var(--border); }
.price-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  min-width: 420px;
}
.price-table th {
  background: var(--slate-900); color: #fff;
  font-family: var(--font-display); font-weight: 600; font-size: 13px;
  padding: 14px 24px; text-align: left;
}
.price-table th:not(:first-child) { text-align: center; }
.price-table td {
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}
.price-table td:not(:first-child) { text-align: center; }
.price-table tr:last-child td { border-bottom: none; }
.price-table tbody tr:hover td { background: var(--copper-soft); transition: background .15s; }
.price-main {
  font-family: var(--font-display); font-weight: 700;
  font-size: 16px; color: var(--copper);
}
.price-swap { color: var(--text-soft); font-size: 15px; }
.vol-label {
  font-family: var(--font-display); font-weight: 600;
  font-size: 15px; color: var(--text);
}
.price-note {
  font-size: 13px; color: var(--text-muted);
  margin-top: 14px; line-height: 1.55;
}

/* ─── Accessories ─── */
.accessories-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.accessory-card {
  background: var(--bg);
  border: 1px solid var(--slate-100);
  box-shadow: var(--shadow-sm);
  border-radius: var(--r-lg);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: box-shadow .25s, transform .25s;
}
.accessory-card:hover {
  box-shadow: 0 8px 32px rgba(212,120,58,0.10), var(--shadow-md);
  transform: translateY(-2px);
}
.accessory-card__img {
  width: 76px; height: 76px; flex-shrink: 0;
  border-radius: var(--r);
  overflow: hidden;
  background: var(--slate-50);
  display: flex; align-items: center; justify-content: center;
}
.accessory-card__img img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.accessory-card__info { flex: 1; min-width: 0; }
.accessory-card__name {
  font-family: var(--font-display); font-weight: 600;
  font-size: 14px; color: var(--text); margin-bottom: 4px;
  line-height: 1.3;
}
.accessory-card__price { font-size: 14px; color: var(--copper); font-weight: 700; margin-bottom: 10px; }
.accessory-card .btn { white-space: nowrap; }

/* ─── Страница азота: грид объёмов ─── */
.azot-grid .product-card__img { height: 150px; }
.azot-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}
.azot-grid--2 { grid-template-columns: repeat(2, minmax(0, 280px)); justify-content: start; }
.azot-grid--1 { grid-template-columns: minmax(0, 280px); justify-content: start; }
.product-card--vol {
  position: relative;
  display: flex;
  flex-direction: column;
}
.product-card--vol .product-card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
}
.product-card--vol .product-card__actions {
  margin-top: auto;
  padding-top: 8px;
}
.product-card--vol::after {
  content: 'N₂';
  position: absolute;
  bottom: -12px;
  right: 4px;
  font-family: var(--font-display);
  font-size: 68px;
  font-weight: 800;
  color: rgba(212,120,58,0.07);
  line-height: 1;
  pointer-events: none;
  user-select: none;
}
.product-card--popular {
  box-shadow: var(--shadow-md);
}
.product-card__popular-badge {
  display: inline-block;
  background: var(--copper);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: 8px;
}
.product-card__vol {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 44px;
  color: var(--copper);
  line-height: 1;
  margin-bottom: 4px;
}
.product-card__vol-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.4;
}

/* ─── Hero badges ─── */
.page-hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.12);
}
.page-hero-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,0.6);
}
.page-hero-badge svg { color: var(--copper); flex-shrink: 0; }

/* ─── Каталог: сетка категорий ─── */
.catalog-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}
.catalog-card {
  display: flex;
  flex-direction: column;
  background: var(--bg);
  border: 1px solid var(--slate-100);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  color: inherit;
  overflow: hidden;
  transition: box-shadow 0.22s, transform 0.22s;
  position: relative;
}
.catalog-card:hover {
  box-shadow: 0 8px 32px rgba(212,120,58,0.12), var(--shadow-md);
  transform: translateY(-3px);
}
.catalog-card::after {
  content: attr(data-formula);
  position: absolute;
  bottom: -8px; right: 6px;
  font-family: var(--font-display);
  font-size: 56px; font-weight: 800;
  color: rgba(212,120,58,0.06);
  pointer-events: none; user-select: none; line-height: 1;
}
.catalog-card__img {
  height: 200px;
  background: var(--slate-800);
  overflow: hidden;
  flex-shrink: 0;
}
.catalog-card__img img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.32s ease;
}
.catalog-card:hover .catalog-card__img img { transform: scale(1.04); }
.catalog-card__body {
  padding: 16px 16px 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.catalog-card__formula {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 36px;
  color: var(--copper);
  line-height: 1;
  margin-bottom: 6px;
}
.catalog-card__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  color: var(--text);
  margin-bottom: 4px;
}
.catalog-card__volumes {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: auto;
}
.catalog-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--copper);
}
.catalog-card:hover .catalog-card__link { gap: 10px; }

/* ─── App tiles ─── */
.app-tiles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.app-tile {
  background: var(--bg-soft);
  border: 1px solid var(--slate-100);
  box-shadow: var(--shadow-sm);
  border-radius: var(--r-lg);
  padding: 20px;
}
.app-tile__icon {
  width: 40px; height: 40px;
  background: var(--copper-soft);
  border-radius: var(--r);
  display: flex; align-items: center; justify-content: center;
  color: var(--copper);
  margin-bottom: 12px;
}
.app-tile__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  color: var(--text);
  margin-bottom: 4px;
}
.app-tile__text {
  font-size: 13px;
  color: var(--text-soft);
  line-height: 1.5;
}
.app-tiles-hint { display: none; }

/* ─── FAQ page ─── */
.faq-page {
  background:
    linear-gradient(180deg, var(--bg-soft) 0%, #fff 100%);
}
.faq-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}
.faq-nav {
  position: sticky;
  top: 88px;
  background: var(--slate-900);
  color: #fff;
  border-radius: var(--r-lg);
  padding: 22px;
  box-shadow: var(--shadow-md);
}
.faq-nav__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  margin-bottom: 12px;
}
.faq-nav a {
  display: flex;
  align-items: center;
  min-height: 38px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  color: rgba(255,255,255,0.78);
  transition: color .2s, padding-left .2s;
}
.faq-nav a:hover {
  color: var(--copper);
  padding-left: 4px;
}
.faq-nav .btn {
  margin-top: 18px;
  color: #fff;
}
.faq-groups {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.faq-group {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  scroll-margin-top: 88px;
}
.faq-group__header {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 24px 24px 20px;
  border-bottom: 1px solid var(--border);
}
.faq-group__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--r);
  background: var(--copper-soft);
  color: var(--copper);
  display: flex;
  align-items: center;
  justify-content: center;
}
.faq-group__title {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--text);
  margin-bottom: 6px;
}
.faq-group__lead {
  font-size: 14px;
  color: var(--text-soft);
  line-height: 1.6;
}
.faq-group .accordion {
  border: none;
  border-radius: 0;
}
.faq-group .accordion-trigger {
  padding: 18px 24px;
}
.faq-group .accordion-content__inner {
  padding: 0 24px 20px;
  max-width: 760px;
}

/* ============================================================
   АДАПТИВ
   ============================================================ */
@media (max-width: 1024px) {
  :root { --gutter: 24px; }
  .hero__title { font-size: 40px; }
  .hero__container { grid-template-columns: 1fr; gap: 48px; }
  .hero__visual { display: none; }
  .catalog-grid { grid-template-columns: repeat(2, 1fr); }
  .gas-grid { grid-template-columns: repeat(3, 1fr); }
  .delivery-rules { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid::before { display: none; }
  .site-footer__grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .cta-strip__inner { flex-direction: column; text-align: center; }
  .cta-strip__title { max-width: 100%; }

  .page-hero__title { font-size: 34px; }
  .page-hero__symbol { font-size: 140px; }
  .gas-page-grid { grid-template-columns: 1fr; gap: 40px; }
  .accessories-grid { grid-template-columns: 1fr 1fr; }
  .azot-grid { grid-template-columns: repeat(3, 1fr); }
  .catalog-grid { grid-template-columns: repeat(3, 1fr); }
  .cert-docs-grid { grid-template-columns: repeat(2, 1fr); }
  .app-tiles { grid-template-columns: repeat(2, 1fr); }
  .faq-layout { grid-template-columns: 1fr; }
  .faq-nav {
    position: static;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0 16px;
  }
  .faq-nav__title,
  .faq-nav .btn {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .section { padding: 48px 0; }
  .section__title { font-size: 26px; }

  .site-header__nav,
  .site-header__actions .btn { display: none; }
  .burger { display: flex; }
  .header-phone { font-size: 12px; }
  .site-header__inner { height: 60px; }
  .header-offset { padding-top: 60px; }

  .hero {
    padding: 72px 0 56px;
    background:
      linear-gradient(
        to bottom,
        rgba(15,25,35,0.93) 0%,
        rgba(15,25,35,0.85) 55%,
        rgba(15,25,35,0.60) 100%
      ),
      url('/images/hero/hero-bg-mob.webp') center top / cover no-repeat;
  }
  .hero__title { font-size: 30px; }
  .hero__badges { gap: 16px; margin-top: 32px; }

  .page-hero { padding: 44px 0 40px; }
  .page-hero__title { font-size: 26px; }
  .page-hero__symbol { font-size: 90px; top: auto; bottom: -10px; transform: none; }
  .page-hero--azot {
    background:
      linear-gradient(to bottom,
        rgba(15,25,35,0.97) 0%,
        rgba(15,25,35,0.88) 55%,
        rgba(15,25,35,0.55) 100%
      ),
      url('/images/hero/hero-azot-mob.webp') center top / cover no-repeat;
  }
  .accessories-grid {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    gap: 14px;
    scroll-snap-type: x mandatory;
    scroll-padding-left: 16px;
    padding-left: 16px;
    padding-right: 16px;
    padding-bottom: 8px;
    margin-left: -16px;
    margin-right: -16px;
    -ms-overflow-style: none;
    scrollbar-width: none;
  }
  .accessories-grid::-webkit-scrollbar { display: none; }
  .accessory-card {
    flex: 0 0 72vw;
    max-width: 260px;
    flex-direction: column;
    align-items: flex-start;
    scroll-snap-align: start;
    padding: 0 0 14px 0;
    gap: 0;
  }
  .accessory-card__img {
    width: 100%;
    height: 150px;
    border-radius: var(--r-lg) var(--r-lg) 0 0;
    margin-bottom: 0;
  }
  .accessory-card__info { padding: 12px 14px 0; width: 100%; box-sizing: border-box; }
  .accessory-card .btn { margin: 0 14px; width: calc(100% - 28px); }
  .azot-grid { grid-template-columns: repeat(2, 1fr); }
  .catalog-grid { grid-template-columns: repeat(2, 1fr); }
  .product-card__vol { font-size: 26px; margin-bottom: 8px; }
  .product-card__body { padding: 10px; }
  .product-card__img { height: 130px; }
  .azot-grid .product-card__img { height: 110px; }
  .product-card__price-row { flex-direction: column; align-items: flex-start; gap: 1px; padding: 7px 0; }
  .product-card__price-label { font-size: 11px; }
  .product-card__price-value { font-size: 15px; }
  .product-card__price-value--exchange { font-size: 13px; }
  .app-tiles { grid-template-columns: 1fr; }
  .page-hero-badges { gap: 12px; }

  .catalog-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .gas-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .cert-docs-grid { gap: 16px; }
  .delivery-rules { gap: 16px; }
  .delivery-rule { min-height: 0; }
  .benefits-grid { grid-template-columns: 1fr; gap: 20px; }
  .benefit-item { display: grid; grid-template-columns: 44px 1fr; column-gap: 16px; align-items: start; }
  .benefit-item__icon { grid-column: 1; grid-row: 1 / span 2; width: 44px; height: 44px; margin-bottom: 0; align-self: start; }
  .benefit-item__body { grid-column: 2; }
  .benefit-item__title { font-size: 15px; margin-bottom: 4px; }
  .benefit-item__text { font-size: 13px; }
  .catalog-actions { gap: 10px; }
  .catalog-actions .btn { flex: 1; min-width: 130px; }
  .articles-grid {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    gap: 14px;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 16px;
    margin: 0 -16px;
    padding-left: 16px;
    padding-right: 16px;
    scroll-padding-left: 16px;
    scrollbar-width: none;
  }
  .articles-grid::-webkit-scrollbar { display: none; }
  .articles-grid .article-card {
    flex: 0 0 78vw;
    max-width: 300px;
    scroll-snap-align: start;
    opacity: 1;
    transform: none;
  }
  .hero__facts { gap: 24px; }
  .form-row { grid-template-columns: 1fr; }

  .site-footer__grid { grid-template-columns: 1fr; gap: 24px; }
  .site-footer__bottom { flex-direction: column; }
  .footer-requisites { text-align: left; }

  .dialog { padding: 24px 20px; }
  .dialog-footer { flex-direction: column-reverse; }
  .dialog-footer .btn { width: 100%; }

  .data-table { display: block; overflow-x: auto; white-space: nowrap; }
  .article-section .content-block { padding: 28px 22px; }
  .content-block h2 { font-size: 22px; margin-top: 34px; }
  .content-block p,
  .content-block li { font-size: 14px; }

  .toast { min-width: 0; max-width: calc(100vw - 32px); }
  .toast-container { right: 16px; bottom: 16px; left: 16px; }

  .tabs-list { overflow-x: auto; width: 100%; }
  .faq-nav { grid-template-columns: repeat(2, 1fr); }
  .faq-group__header { padding: 20px; }
  .faq-group .accordion-trigger { padding: 16px 20px; }
  .faq-group .accordion-content__inner { padding: 0 20px 18px; }
}

@media (max-width: 699px) {
  .app-tiles {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    gap: 12px;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 16px;
    margin: 0 -16px;
    padding-left: 16px;
    padding-right: 16px;
    scroll-padding-left: 16px;
    scrollbar-width: none;
  }

  .app-tiles::-webkit-scrollbar { display: none; }

  .app-tile {
    flex: 0 0 76vw;
    max-width: 280px;
    scroll-snap-align: start;
  }

  .app-tiles .app-tile {
    opacity: 1;
    transform: none;
  }

  .app-tiles-hint {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
    margin-top: 8px;
  }
}

@media (max-width: 480px) {
  :root { --gutter: 16px; }

  .hero__title { font-size: 24px; }
  .hero__subtitle { font-size: 15px; }
  .page-hero__title { font-size: 22px; }
  .btn--lg { height: 50px; font-size: 14px; padding: 0 24px; }

  .catalog-grid { grid-template-columns: 1fr; }
  .gas-grid {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    gap: 14px;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 16px;
    margin: 0 -16px;
    padding-left: 16px;
    padding-right: 16px;
    scroll-padding-left: 16px;
    scrollbar-width: none;
  }
  .gas-grid::-webkit-scrollbar { display: none; }
  .gas-grid .gas-card {
    flex: 0 0 82vw;
    max-width: 320px;
    scroll-snap-align: start;
    opacity: 1;
    transform: none;
  }
  .cert-docs-grid { grid-template-columns: 1fr; }
  .delivery-rules { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
  .step__num { width: 40px; height: 40px; font-size: 16px; margin-bottom: 12px; }
  .step__title { font-size: 13px; }
  .step__text { font-size: 12px; }
  .section__title { font-size: 22px; }
  .article-section .content-block {
    padding: 0;
    border: none;
    border-radius: 0;
    box-shadow: none;
    background: transparent;
  }
  .article-section {
    background: var(--bg);
  }
  .article-cover {
    margin-left: calc(-1 * var(--gutter));
    margin-right: calc(-1 * var(--gutter));
    border-radius: 0;
    border-left: none;
    border-right: none;
  }
  .faq-nav { display: none; }
  .faq-groups { gap: 16px; }
  .faq-group__header {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 12px;
  }
  .faq-group__icon {
    width: 40px;
    height: 40px;
  }
  .faq-group__title { font-size: 20px; }
}