:root {
  --bg: #eef6fb;
  --panel: #ffffff;
  --panel-2: #f8fbfd;
  --line: #d4e4ee;
  --line-strong: #1479b4;
  --text: #18222d;
  --muted: #65727f;
  --muted-2: #8794a1;
  --orange: #1479b4;
  --orange-2: #0d6095;
  --blue: #1b94ca;
  --blue-soft: #e8f6ff;
  --shadow: 0 10px 28px rgba(19, 91, 139, 0.1);
  --content: 1080px;
  --pad: clamp(14px, 3vw, 26px);
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

/* Design refresh: split hero, cleaner cards, stronger blue-white identity. */
.site-header {
  border-bottom: 3px solid rgba(20, 121, 180, 0.18);
}

.brand-mark,
.header-phone span {
  border-color: rgba(20, 121, 180, 0.34);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.75);
}

.hero {
  grid-template-columns: minmax(0, 1fr) minmax(260px, 360px);
  justify-items: stretch;
  align-items: center;
  gap: 28px;
  width: min(100%, var(--content));
  margin: 0 auto;
  padding: 52px var(--pad) 46px;
  border-bottom: 0;
  background: transparent;
  text-align: left;
}

.hero > * {
  max-width: none;
}

.hero-content {
  min-width: 0;
  padding-left: 18px;
  border-left: 4px solid var(--blue);
}

.hero h1 {
  max-width: 650px;
  font-size: 2.5rem;
}

.hero-copy {
  max-width: 560px;
}

.hero-phone {
  color: var(--blue);
}

.hero-rule {
  display: none;
}

.hero-note {
  justify-content: flex-start;
}

.hero-panel {
  display: grid;
  gap: 18px;
  min-height: 250px;
  padding: 22px;
  border: 1px solid #cfe2ee;
  border-radius: 10px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(232, 246, 255, 0.78)),
    #ffffff;
  box-shadow: 0 18px 40px rgba(19, 91, 139, 0.13);
}

.panel-label {
  justify-self: start;
  min-height: 28px;
  padding: 0 12px;
  border-radius: 999px;
  background: #ffffff;
  color: var(--blue);
  font-size: 0.64rem;
  font-weight: 950;
  letter-spacing: 2px;
  line-height: 28px;
  text-transform: uppercase;
}

.panel-cylinders {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  align-items: end;
  gap: 10px;
  min-height: 128px;
}

.panel-cylinders span {
  position: relative;
  display: grid;
  min-height: 118px;
  place-items: center;
  border-radius: 18px 18px 9px 9px;
  background: linear-gradient(90deg, #0d6095, #38a9df 50%, #0a527f);
  color: #ffffff;
  font-size: 0.84rem;
  font-weight: 950;
  box-shadow: inset 8px 0 12px rgba(255, 255, 255, 0.2);
}

.panel-cylinders span::before {
  content: "";
  position: absolute;
  top: -14px;
  width: 22px;
  height: 16px;
  border-radius: 6px 6px 3px 3px;
  background: #9fb7c5;
}

.panel-cylinders span:nth-child(1) {
  min-height: 150px;
}

.panel-cylinders span:nth-child(2) {
  min-height: 120px;
  background: linear-gradient(90deg, #2d83b8, #7ed5ff 50%, #1d6c9c);
}

.panel-cylinders span:nth-child(3) {
  min-height: 104px;
  background: linear-gradient(90deg, #5c8c62, #95cf8b 50%, #44714b);
}

.panel-meta {
  display: grid;
  gap: 4px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.panel-meta b {
  color: var(--text);
  font-size: 1.1rem;
}

.panel-meta span {
  color: var(--muted);
  font-size: 0.74rem;
}

.catalog {
  padding-top: 38px;
}

.catalog h2 {
  font-size: 1.72rem;
}

.product-card {
  border-top: 0;
  border-left: 4px solid var(--blue);
  background: linear-gradient(180deg, #ffffff, #fbfdff);
  box-shadow: 0 10px 24px rgba(19, 91, 139, 0.08);
}

.product-visual,
.mini-cylinder {
  background: #f4f9fd;
}

.product-copy h3 {
  color: #142d40;
}

.card-actions {
  margin-top: 10px;
}

.footer {
  background: #dfeef7;
}

@media (min-width: 860px) {
  .hero {
    padding-top: 58px;
    padding-bottom: 52px;
  }

  .hero h1 {
    font-size: 2.7rem;
  }
}

@media (max-width: 820px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 22px;
    padding: 36px 18px 40px;
    text-align: left;
  }

  .hero-content {
    padding-left: 14px;
  }

  .hero h1 {
    font-size: 1.62rem;
  }

  .hero-panel {
    min-height: 210px;
  }
}

@media (max-width: 520px) {
  .hero {
    padding: 30px 14px 34px;
  }

  .hero h1 {
    font-size: 1.36rem;
  }

  .hero-panel {
    min-height: 184px;
    padding: 18px;
  }

  .panel-cylinders {
    min-height: 108px;
  }

  .panel-cylinders span {
    min-height: 96px;
    font-size: 0.7rem;
  }

  .panel-cylinders span:nth-child(1) {
    min-height: 120px;
  }

  .panel-cylinders span:nth-child(2) {
    min-height: 98px;
  }

  .panel-cylinders span:nth-child(3) {
    min-height: 84px;
  }
}

/* Final revert layer: centered hero after the temporary split layout. */
.hero {
  display: grid;
  grid-template-columns: 1fr;
  justify-items: center;
  gap: 0;
  width: auto;
  margin: 0;
  padding: 46px max(var(--pad), calc((100vw - var(--content)) / 2 + var(--pad))) 50px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(232, 246, 255, 0.88)) var(--panel-2);
  text-align: center;
}

.hero > * {
  max-width: 690px;
}

.hero h1 {
  margin-top: 20px;
  font-size: 2.35rem;
}

.hero-copy {
  max-width: 690px;
}

.hero-phone {
  color: var(--text);
}

.hero-rule {
  display: block;
}

.hero-note {
  justify-content: center;
}

.hero-panel {
  display: none;
}

.catalog {
  padding-top: 44px;
}

.catalog h2 {
  font-size: 1.55rem;
}

.product-card {
  border-left: 1px solid var(--line);
  border-top: 4px solid var(--orange-2);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.product-visual,
.mini-cylinder {
  background: linear-gradient(180deg, #f8fafc, #edf2f6);
}

.card-actions {
  margin-top: 12px;
}

.footer {
  background: #e7edf2;
}

@media (min-width: 860px) {
  .hero {
    padding-top: 52px;
    padding-bottom: 56px;
  }

  .hero h1 {
    font-size: 2.55rem;
  }
}

@media (min-width: 1180px) {
  .hero h1 {
    font-size: 2.8rem;
  }
}

@media (max-width: 820px) {
  .hero {
    padding: 34px 18px 42px;
    text-align: center;
  }

  .hero h1 {
    font-size: 1.65rem;
  }
}

@media (max-width: 520px) {
  .hero {
    padding: 30px 14px 38px;
  }

  .hero h1 {
    font-size: 1.42rem;
  }
}

/* Revert latest redesign: centered hero and previous white-blue card layout. */
.hero {
  display: grid;
  grid-template-columns: 1fr;
  justify-items: center;
  gap: 0;
  width: auto;
  margin: 0;
  padding: 46px max(var(--pad), calc((100vw - var(--content)) / 2 + var(--pad))) 50px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(232, 246, 255, 0.88)) var(--panel-2);
  text-align: center;
}

.hero > * {
  max-width: 690px;
}

.hero h1 {
  margin-top: 20px;
  font-size: 2.35rem;
}

.hero-copy {
  max-width: 690px;
}

.hero-phone {
  color: var(--text);
}

.hero-rule {
  display: block;
}

.hero-note {
  justify-content: center;
}

.hero-panel {
  display: none;
}

.catalog {
  padding-top: 44px;
}

.catalog h2 {
  font-size: 1.55rem;
}

.product-card {
  border-left: 1px solid var(--line);
  border-top: 4px solid var(--orange-2);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.product-visual,
.mini-cylinder {
  background: linear-gradient(180deg, #f8fafc, #edf2f6);
}

.card-actions {
  margin-top: 12px;
}

.footer {
  background: #e7edf2;
}

@media (min-width: 860px) {
  .hero {
    padding-top: 52px;
    padding-bottom: 56px;
  }

  .hero h1 {
    font-size: 2.55rem;
  }
}

@media (min-width: 1180px) {
  .hero h1 {
    font-size: 2.8rem;
  }
}

@media (max-width: 820px) {
  .hero {
    padding: 34px 18px 42px;
    text-align: center;
  }

  .hero h1 {
    font-size: 1.65rem;
  }
}

@media (max-width: 520px) {
  .hero {
    padding: 30px 14px 38px;
  }

  .hero h1 {
    font-size: 1.42rem;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background: linear-gradient(180deg, #ffffff 0, #f2f8fd 420px, var(--bg) 100%) var(--bg);
  color: var(--text);
}

a,
button {
  color: inherit;
  font: inherit;
}

a {
  text-decoration: none;
}

button {
  border: 0;
  cursor: pointer;
}

main {
  overflow: hidden;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 58px;
  padding: 8px max(var(--pad), calc((100vw - var(--content)) / 2 + var(--pad)));
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
  box-shadow: 0 8px 24px rgba(28, 42, 56, 0.06);
}

.brand,
.header-phone {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  white-space: nowrap;
}

.brand-mark,
.header-phone span {
  display: grid;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  place-items: center;
  border: 2px solid var(--line-strong);
  border-radius: 8px;
  background: #e8f6ff;
  color: var(--orange);
}

.brand-mark {
  gap: 4px;
  align-content: center;
}

.brand-mark i {
  display: block;
  height: 4px;
  border-radius: 999px;
  background: var(--orange);
}

.brand-mark i:nth-child(1) {
  width: 24px;
  transform: translateX(4px);
}

.brand-mark i:nth-child(2) {
  width: 30px;
}

.brand-mark i:nth-child(3) {
  width: 20px;
  transform: translateX(-3px);
}

.brand strong,
.header-phone {
  font-size: 0.95rem;
  font-weight: 950;
  line-height: 1;
}

.header-phone span {
  width: 34px;
  height: 34px;
  border: 0;
  font-size: 1rem;
}

.phone-icon {
  display: block;
  width: 1em;
  height: 1em;
  fill: currentColor;
}

.hero {
  display: grid;
  justify-items: center;
  padding: 46px max(var(--pad), calc((100vw - var(--content)) / 2 + var(--pad))) 50px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(232, 246, 255, 0.88)) var(--panel-2);
  text-align: center;
}

.hero > * {
  max-width: 690px;
}

.region-pill,
.discount-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  padding: 0 17px;
  border: 1.5px solid var(--line-strong);
  border-radius: 999px;
  background: #e8f6ff;
  color: var(--orange);
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 2.7px;
  text-transform: uppercase;
}

.hero h1 {
  margin: 20px 0 0;
  font-size: 2.35rem;
  line-height: 1.04;
}

.hero-copy {
  margin: 13px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.35;
}

.hero-phone {
  display: inline-block;
  margin-top: 9px;
  border-bottom: 1.5px solid currentColor;
  color: var(--text);
  font-size: 1rem;
  font-weight: 900;
  line-height: 1.1;
}

.hero-rule {
  width: min(100%, 680px);
  height: 1px;
  margin-top: 18px;
  background: var(--line);
}

.hero-note {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 9px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.45;
}

.hero-note span {
  display: grid;
  width: 20px;
  height: 20px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 50%;
  background: var(--orange);
  color: #ffffff;
  font-size: 0.72rem;
  font-weight: 950;
  transform: translateY(3px);
}

.call-button,
.telegram-outline,
.telegram-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 42px;
  width: auto;
  padding: 0 22px;
  margin-top: 22px;
  border-radius: 8px;
  background: var(--orange);
  color: #ffffff;
  font-size: 0.82rem;
  font-weight: 950;
  line-height: 1;
}

.call-button.small,
.telegram-outline {
  min-height: 34px;
  margin-top: 0;
  padding: 0 12px;
  font-size: 0.66rem;
}

.telegram-outline {
  border: 1.5px solid #b7d8eb;
  background: var(--blue-soft);
  color: var(--blue);
}

.catalog {
  width: min(100%, var(--content));
  margin: 0 auto;
  padding: 44px var(--pad) 0;
}

.extras {
  padding-top: 34px;
  padding-bottom: 50px;
}

.section-label {
  margin: 0 0 11px;
  color: var(--orange);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 3px;
  text-transform: uppercase;
}

.catalog h2 {
  margin: 0 0 22px;
  font-size: 1.55rem;
  line-height: 1;
}

.products {
  display: grid;
  gap: 14px;
}

#main-products,
.compact-products {
  grid-template-columns: 1fr;
}

.product-card {
  display: grid;
  gap: 14px;
  padding: 15px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--orange-2);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.product-visual {
  display: grid;
  min-height: 120px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, #f8fafc, #edf2f6);
}

.product-visual svg {
  width: min(58%, 150px);
  height: auto;
}

.product-copy h3 {
  margin: 0 0 9px;
  font-size: 1.02rem;
  line-height: 1.08;
}

.product-copy p {
  max-width: 820px;
  margin: 0 0 13px;
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.42;
}

.price-grid {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0 0 13px;
  border-bottom: 1px solid var(--line);
}

.price-grid div,
.single-price {
  display: grid;
  gap: 6px;
}

.price-grid dt,
.single-price span {
  color: var(--muted-2);
  font-size: 0.58rem;
  font-weight: 950;
  letter-spacing: 1.8px;
  text-transform: uppercase;
}

.price-grid dd {
  margin: 0;
  font-size: 1.12rem;
  font-weight: 950;
  line-height: 1;
}

.price-grid dd span {
  color: var(--muted-2);
  font-size: 0.66rem;
}

.buy-price,
.single-price strong {
  color: var(--orange-2);
}

.exchange-price {
  color: var(--blue);
}

.card-actions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-top: 12px;
}

.mini-cylinder {
  display: grid;
  min-height: 92px;
  place-items: center;
  border-radius: 8px;
  background: linear-gradient(180deg, #f8fafc, #edf2f6);
  color: #1479b4;
}

.mini-cylinder svg {
  width: 66px;
  height: auto;
}

.mini-cylinder.blue {
  color: #55bfff;
}

.mini-cylinder.violet {
  color: #9477e8;
}

.mini-cylinder.green {
  color: #72b959;
}

.single-price {
  margin-bottom: 14px;
}

.single-price strong {
  font-size: 1.16rem;
  line-height: 1;
}

.compact-card .call-button {
  width: 100%;
}

.footer {
  display: grid;
  gap: 12px;
  padding: 36px max(var(--pad), calc((100vw - var(--content)) / 2 + var(--pad))) 44px;
  border-top: 1px solid var(--line);
  background: #e7edf2;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.5;
}

.footer strong {
  color: var(--text);
  font-size: 1.2rem;
}

.footer p {
  max-width: 860px;
  margin: 0;
}

.telegram-modal {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 18px;
}

.telegram-modal.visible {
  display: flex;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(24, 34, 45, 0.45);
}

.modal-card {
  position: relative;
  z-index: 1;
  display: grid;
  width: min(100%, 500px);
  justify-items: center;
  gap: 16px;
  padding: 38px 34px 30px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  box-shadow: var(--shadow);
  text-align: center;
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f1f5f8;
  color: var(--muted);
  font-size: 1.8rem;
  line-height: 1;
}

.telegram-icon {
  display: grid;
  width: 70px;
  height: 70px;
  place-items: center;
  border-radius: 16px;
  background: var(--blue-soft);
  color: var(--blue);
  font-size: 1.9rem;
}

.modal-card h2 {
  margin: 0;
  font-size: 1.62rem;
  line-height: 1.08;
}

.modal-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.45;
}

.telegram-fallback {
  max-width: 340px;
  color: var(--muted);
  font-size: 0.72rem;
}

.telegram-fallback strong {
  color: var(--text);
}

.discount-pill {
  min-height: 40px;
  padding: 0 18px;
  letter-spacing: 0;
  text-transform: none;
}

.telegram-button {
  width: 100%;
  margin-top: 0;
  background: var(--blue);
}

.modal-skip {
  background: transparent;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 700;
}

@media (min-width: 620px) {
  #main-products,
  .compact-products {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .card-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .site-header {
    min-height: 62px;
  }

  .brand-mark {
    width: 42px;
    height: 42px;
  }

  .brand strong,
  .header-phone {
    font-size: 1rem;
  }

  .hero {
    padding-top: 52px;
    padding-bottom: 56px;
  }

  .hero h1 {
    font-size: 2.55rem;
  }

  .catalog {
    padding-top: 48px;
  }

  #main-products {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .compact-products {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .card-actions {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 1180px) {
  :root {
    --content: 1160px;
  }

  .hero h1 {
    font-size: 2.8rem;
  }

  .product-card {
    padding: 16px;
  }
}

@media (max-width: 520px) {
  .site-header {
    min-height: 52px;
    padding: 7px 12px;
  }

  .brand,
  .header-phone {
    gap: 8px;
  }

  .brand-mark {
    width: 32px;
    height: 32px;
    border-radius: 8px;
  }

  .brand-mark i {
    height: 3px;
  }

  .brand-mark i:nth-child(1) {
    width: 20px;
  }

  .brand-mark i:nth-child(2) {
    width: 25px;
  }

  .brand-mark i:nth-child(3) {
    width: 17px;
  }

  .header-phone span {
    display: none;
  }

  .brand strong,
  .header-phone {
    font-size: 0.72rem;
  }

  .hero {
    padding: 28px 14px 34px;
  }

  .region-pill,
  .discount-pill {
    min-height: 28px;
    padding: 0 13px;
    font-size: 0.58rem;
    letter-spacing: 1.9px;
  }

  .hero h1 {
    margin-top: 17px;
    font-size: 1.38rem;
  }

  .hero-copy {
    margin-top: 11px;
    font-size: 0.72rem;
  }

  .hero-phone {
    font-size: 0.82rem;
  }

  .hero-rule {
    margin-top: 16px;
  }

  .hero-note {
    margin-top: 16px;
    font-size: 0.66rem;
  }

  .hero-note span {
    width: 18px;
    height: 18px;
    font-size: 0.64rem;
  }

  .call-button,
  .telegram-outline,
  .telegram-button {
    min-height: 40px;
    padding: 0 16px;
    margin-top: 20px;
    font-size: 0.72rem;
  }

  .call-button.small,
  .telegram-outline {
    min-height: 33px;
    margin-top: 0;
    font-size: 0.64rem;
  }

  .catalog {
    padding: 32px 14px 0;
  }

  .extras {
    padding-top: 28px;
    padding-bottom: 40px;
  }

  .section-label {
    margin-bottom: 9px;
    font-size: 0.64rem;
    letter-spacing: 2.3px;
  }

  .catalog h2 {
    margin-bottom: 18px;
    font-size: 1.26rem;
  }

  .products {
    gap: 13px;
  }

  .product-card {
    gap: 13px;
    padding: 13px;
  }

  .product-visual {
    min-height: 108px;
  }

  .product-visual svg {
    width: min(55%, 124px);
  }

  .product-copy h3 {
    font-size: 0.98rem;
  }

  .product-copy p {
    font-size: 0.68rem;
  }

  .price-grid dd {
    font-size: 1.06rem;
  }

  .mini-cylinder {
    min-height: 84px;
  }

  .footer {
    padding: 30px 14px 38px;
    font-size: 0.78rem;
  }

  .modal-card {
    width: min(100%, 360px);
    gap: 14px;
    padding: 34px 20px 26px;
  }

  .modal-close {
    top: 12px;
    right: 12px;
    width: 34px;
    height: 34px;
    font-size: 1.55rem;
  }

  .telegram-icon {
    width: 62px;
    height: 62px;
    border-radius: 14px;
    font-size: 1.7rem;
  }

  .modal-card h2 {
    font-size: 1.34rem;
  }

  .modal-card p {
    font-size: 0.76rem;
  }

  .discount-pill {
    min-height: 36px;
    font-size: 0.68rem;
  }

  .modal-skip {
    font-size: 0.78rem;
  }
}