:root {
  --blue-900: #071c34;
  --blue-800: #0b2f56;
  --blue-700: #10497d;
  --blue-600: #1768a8;
  --gray-100: #f4f7fb;
  --gray-200: #e6ebf2;
  --gray-500: #64748b;
  --gray-700: #334155;
  --white: #ffffff;
  --dark: #0f172a;
  --shadow: 0 16px 40px rgba(15, 23, 42, .12);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', Arial, sans-serif;
  color: var(--dark);
  background: var(--gray-100);
  line-height: 1.6;
}

img {
  width: 100%;
  display: block;
}

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

.container {
  width: min(1180px, 92%);
  margin: 0 auto;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 20;
  background: rgba(7, 28, 52, .88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}

.header-content {
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: .08em;
}

.main-nav {
  display: flex;
  gap: 32px;
  color: var(--white);
  font-weight: 600;
}

.main-nav a {
  opacity: .88;
  transition: .2s ease;
}

.main-nav a:hover {
  opacity: 1;
  color: #b9dcff;
}

.menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--white);
  font-size: 1.8rem;
  cursor: pointer;
}

.hero {
  min-height: 100vh;
  position: relative;
  overflow: hidden;
  background: var(--blue-900);
}

.slider,
.slide {
  min-height: 100vh;
}

.slide {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transform: scale(1.03);
  transition: opacity .8s ease, transform 1.2s ease;
}

.slide.active {
  opacity: 1;
  transform: scale(1);
  z-index: 1;
}

.hero-content {
  color: var(--white);
  max-width: 720px;
  padding-top: 72px;
  position: relative;
  z-index: 2;
}

.hero-tag,
.section-heading span,
.section-kicker {
  display: inline-block;
  color: #b9dcff;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: .78rem;
  margin-bottom: 14px;
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 5.2rem);
  line-height: 1.05;
  margin-bottom: 22px;
  letter-spacing: -0.05em;
}

.hero p {
  max-width: 640px;
  font-size: 1.15rem;
  color: rgba(255, 255, 255, .88);
  margin-bottom: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border-radius: 999px;
  font-weight: 800;
  transition: .2s ease;
}

.btn.primary {
  background: var(--blue-600);
  color: var(--white);
  box-shadow: 0 12px 24px rgba(23, 104, 168, .32);
}

.btn.primary:hover {
  background: var(--blue-700);
  transform: translateY(-2px);
}

.btn.secondary {
  border: 1px solid rgba(255, 255, 255, .5);
  color: var(--white);
}

.btn.secondary:hover {
  background: rgba(255, 255, 255, .12);
}

.slider-dots {
  position: absolute;
  left: 50%;
  bottom: 32px;
  transform: translateX(-50%);
  z-index: 5;
  display: flex;
  gap: 10px;
}

.slider-dots button {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, .45);
  cursor: pointer;
}

.slider-dots button.active {
  background: var(--white);
}

.catalog-section {
  padding: 86px 0;
}

.section-heading {
  text-align: center;
  max-width: 740px;
  margin: 0 auto 44px;
}

.section-heading h2,
.company-card h2 {
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1.12;
  letter-spacing: -0.04em;
  color: var(--blue-900);
  margin-bottom: 16px;
}

.section-heading p {
  color: var(--gray-500);
  font-size: 1.05rem;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.product-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 22px;
  overflow: hidden;
  box-shadow: 0 8px 22px rgba(15, 23, 42, .06);
  display: flex;
  flex-direction: column;
  transition: .2s ease;
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
}

.product-image {
  height: 210px;
  object-fit: cover;
  background: var(--gray-200);
}

.product-info {
  padding: 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.product-info h3 {
  color: var(--blue-900);
  font-size: 1.1rem;
  line-height: 1.3;
  margin-bottom: 10px;
}

.product-info p {
  color: var(--gray-500);
  font-size: .95rem;
  min-height: 112px;
  margin-bottom: 18px;
}

.price {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--blue-700);
  margin-bottom: 16px;
}

.buy-button {
  margin-top: auto;
  width: 100%;
  border: none;
  background: var(--blue-800);
  color: var(--white);
  border-radius: 14px;
  padding: 13px 16px;
  font-weight: 800;
  cursor: pointer;
  transition: .2s ease;
}

.buy-button:hover {
  background: var(--blue-600);
}

.company-section {
  padding: 30px 0 86px;
}

.company-card {
  background: linear-gradient(135deg, var(--blue-900), var(--blue-700));
  border-radius: 30px;
  color: var(--white);
  padding: clamp(30px, 6vw, 58px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: center;
  box-shadow: var(--shadow);
}

.company-card h2 {
  color: var(--white);
}

.company-card p {
  color: rgba(255, 255, 255, .84);
  font-size: 1.05rem;
}

.site-footer {
  background: #061525;
  color: var(--white);
  padding-top: 62px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr 1fr;
  gap: 34px;
  padding-bottom: 44px;
}

.site-footer h3 {
  font-size: 1.7rem;
  letter-spacing: .08em;
  margin-bottom: 12px;
}

.site-footer h4 {
  margin-bottom: 14px;
  color: #b9dcff;
}

.site-footer p,
.site-footer a {
  color: rgba(255, 255, 255, .75);
  font-size: .95rem;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.social-links a {
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 999px;
  padding: 8px 12px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1);
  text-align: center;
  padding: 18px;
}

.whatsapp-float {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 30;
  background: #25d366;
  color: white;
  border-radius: 999px;
  padding: 14px 18px;
  font-weight: 800;
  box-shadow: 0 14px 28px rgba(0, 0, 0, .22);
}

@media (max-width: 1050px) {
  .product-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 780px) {
  .menu-toggle {
    display: block;
  }

  .main-nav {
    position: fixed;
    top: 76px;
    left: 0;
    width: 100%;
    background: var(--blue-900);
    padding: 22px;
    flex-direction: column;
    gap: 18px;
    transform: translateY(-130%);
    transition: .25s ease;
  }

  .main-nav.open {
    transform: translateY(0);
  }

  .product-grid,
  .company-card,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero-content {
    padding-top: 88px;
  }

  .catalog-section {
    padding: 64px 0;
  }
}

@media (max-width: 520px) {
  .product-grid {
    gap: 18px;
  }

  .product-image {
    height: 190px;
  }

  .whatsapp-float {
    right: 14px;
    bottom: 14px;
    padding: 12px 15px;
  }
}