:root {
  --blue: #0757b8;
  --blue-dark: #053a7a;
  --blue-light: #e8f3ff;
  --red: #e21d2f;
  --ink: #102033;
  --muted: #5c6b7d;
  --line: #d8e2ef;
  --white: #ffffff;
  --shadow: 0 18px 48px rgba(5, 58, 122, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
  padding: 12px clamp(18px, 4vw, 56px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.brand img {
  display: block;
  width: min(190px, 42vw);
  height: auto;
}

.nav {
  display: flex;
  gap: 22px;
  color: var(--blue-dark);
  font-size: 0.95rem;
  font-weight: 700;
}

.nav a {
  padding: 10px 0;
}

.nav-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 8px;
  font-weight: 800;
  line-height: 1;
  white-space: nowrap;
}

.nav-cta,
.button.primary {
  color: var(--white);
  background: var(--red);
  box-shadow: 0 10px 20px rgba(226, 29, 47, 0.22);
}

.button.secondary {
  color: var(--blue-dark);
  background: var(--white);
  border: 1px solid var(--line);
}

.button.light {
  color: var(--blue-dark);
  background: var(--white);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  min-height: calc(100vh - 76px);
  padding: clamp(48px, 8vw, 88px) clamp(18px, 5vw, 72px);
  background:
    linear-gradient(120deg, rgba(232, 243, 255, 0.96) 0%, rgba(255, 255, 255, 0.98) 58%),
    linear-gradient(145deg, var(--blue-light), var(--white));
}

.hero-content,
.section,
.band,
.footer {
  width: min(1120px, 100%);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--red);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 18px;
  color: var(--blue-dark);
  font-size: clamp(2.45rem, 6vw, 5.7rem);
  line-height: 0.96;
  letter-spacing: 0;
}

h2 {
  color: var(--blue-dark);
  font-size: clamp(1.75rem, 3vw, 3rem);
  line-height: 1.05;
  letter-spacing: 0;
}

h3 {
  color: var(--blue-dark);
  font-size: 1.2rem;
}

.lead {
  max-width: 620px;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.35rem);
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.quick-info {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 720px;
  margin: 0;
}

.quick-info div,
.card,
.contact-grid div {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.quick-info div {
  padding: 16px;
}

dt {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

dd {
  margin: 6px 0 0;
  color: var(--blue-dark);
  font-weight: 900;
}

.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 500px;
  border-radius: 8px;
  overflow: hidden;
  background:
    linear-gradient(160deg, rgba(7, 87, 184, 0.95), rgba(5, 58, 122, 0.98)),
    var(--blue);
  box-shadow: var(--shadow);
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 10%;
  border: 2px solid rgba(255, 255, 255, 0.18);
  border-radius: 50%;
}

.gas-cylinder {
  position: relative;
  width: min(260px, 58vw);
  height: 340px;
  border-radius: 90px 90px 52px 52px;
  background:
    linear-gradient(90deg, #c6ccd3, #f7f8fa 36%, #9ea8b2 70%, #d9dde2),
    #d9dde2;
  border: 10px solid rgba(255, 255, 255, 0.28);
  box-shadow: 0 28px 48px rgba(0, 0, 0, 0.24);
}

.gas-cylinder::before {
  content: "";
  position: absolute;
  top: -50px;
  left: 50%;
  width: 98px;
  height: 62px;
  transform: translateX(-50%);
  border: 14px solid #d9dde2;
  border-bottom: 0;
  border-radius: 42px 42px 0 0;
}

.gas-cylinder span {
  position: absolute;
  top: 86px;
  left: 50%;
  width: 86px;
  height: 118px;
  transform: translateX(-50%);
  border-radius: 46px 46px 58px 58px;
  background: linear-gradient(180deg, #ff4a36, var(--red));
}

.service-card {
  position: absolute;
  right: 24px;
  bottom: 24px;
  width: min(260px, calc(100% - 48px));
  padding: 18px;
  color: var(--blue-dark);
  background: var(--white);
  border-radius: 8px;
  box-shadow: 0 18px 32px rgba(0, 0, 0, 0.18);
}

.service-card strong,
.service-card span {
  display: block;
}

.service-card span {
  margin-top: 8px;
  color: var(--muted);
  line-height: 1.45;
}

.section {
  margin: 0 auto;
  padding: clamp(52px, 8vw, 88px) clamp(18px, 4vw, 28px);
}

.section-heading {
  max-width: 680px;
  margin-bottom: 28px;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card {
  min-height: 190px;
  padding: 24px;
}

.card p {
  color: var(--muted);
  line-height: 1.58;
}

.band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
  margin: 0 auto;
  padding: clamp(34px, 5vw, 58px) clamp(18px, 4vw, 36px);
  color: var(--white);
  background: var(--blue-dark);
}

.band h2,
.band .eyebrow {
  color: var(--white);
}

.band p {
  max-width: 760px;
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.84);
  line-height: 1.62;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 22px;
}

.contact-grid div {
  padding: 20px;
}

.contact-grid span,
.contact-grid strong {
  display: block;
}

.contact-grid span {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 800;
}

.contact-grid strong {
  margin-top: 8px;
  color: var(--blue-dark);
  font-size: 1.1rem;
}

.wide {
  width: fit-content;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin: 0 auto;
  padding: 28px clamp(18px, 4vw, 28px) 42px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.footer img {
  width: 160px;
  height: auto;
}

.footer p {
  margin: 0;
}

@media (max-width: 860px) {
  .topbar {
    flex-wrap: wrap;
    gap: 12px;
  }

  .nav {
    order: 3;
    width: 100%;
    justify-content: space-between;
    gap: 8px;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero-visual {
    min-height: 390px;
  }

  .quick-info,
  .service-grid,
  .contact-grid,
  .band {
    grid-template-columns: 1fr;
  }

  .band {
    align-items: start;
  }
}

@media (max-width: 560px) {
  .brand img {
    width: 152px;
  }

  .nav-cta {
    min-height: 40px;
    padding: 0 14px;
  }

  .button {
    width: 100%;
  }

  .hero {
    padding-top: 34px;
  }

  h1 {
    font-size: 2.35rem;
  }

  .hero-visual {
    min-height: 330px;
  }

  .gas-cylinder {
    width: 178px;
    height: 250px;
  }

  .service-card {
    right: 16px;
    bottom: 16px;
  }

  .footer {
    align-items: flex-start;
    flex-direction: column;
  }
}