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

body {
  font-family: Arial, Helvetica, sans-serif;
  color: #0b1f3a;
  line-height: 1.6;
  background: #ffffff;
}

.container {
  width: 90%;
  max-width: 1150px;
  margin: auto;
}

.navbar {
  background: #ffffff;
  padding: 15px 0;
  box-shadow: 0 2px 15px rgba(0,0,0,0.08);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  max-height: 85px;
}

nav a {
  text-decoration: none;
  color: #0b1f3a;
  margin-left: 22px;
  font-weight: 700;
}

.nav-button {
  background: #b88935;
  color: #ffffff !important;
  padding: 10px 18px;
  border-radius: 30px;
}

.hero {
  position: relative;
  min-height: 82vh;
  background: linear-gradient(rgba(5,20,40,0.55), rgba(5,20,40,0.65)),
              url('https://images.unsplash.com/photo-1578575437130-527eed3abbec?auto=format&fit=crop&w=1600&q=80') center/cover;
  display: flex;
  align-items: center;
  text-align: center;
  color: #ffffff;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero h1 {
  font-size: 64px;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 15px;
}

.slogan {
  font-size: 28px;
  color: #d6a44c;
  font-weight: bold;
  margin-bottom: 20px;
}

.intro {
  font-size: 21px;
  max-width: 760px;
  margin: 0 auto 35px;
}

.main-button {
  display: inline-block;
  background: #b88935;
  color: #ffffff;
  padding: 15px 30px;
  border-radius: 40px;
  text-decoration: none;
  font-weight: bold;
  transition: 0.3s;
}

.main-button:hover {
  background: #0b1f3a;
}

.section {
  padding: 80px 0;
}

.section h2 {
  font-size: 38px;
  margin-bottom: 25px;
  color: #0b1f3a;
}

.two-col {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 40px;
  align-items: center;
}

.card {
  background: #0b1f3a;
  color: #ffffff;
  padding: 35px;
  border-radius: 18px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.12);
}

.card h3 {
  color: #d6a44c;
  margin-bottom: 15px;
}

.dark {
  background: #0b1f3a;
  color: #ffffff;
}

.dark h2 {
  color: #ffffff;
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.service {
  background: #ffffff;
  color: #0b1f3a;
  padding: 25px;
  border-radius: 16px;
}

.service h3 {
  color: #b88935;
  margin-bottom: 12px;
}

.products {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.products span {
  background: #f2f4f8;
  padding: 16px 24px;
  border-radius: 35px;
  font-weight: bold;
  border: 1px solid #e0e3ea;
}

.why {
  background: #f7f8fb;
}

.checklist {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  font-size: 19px;
  font-weight: bold;
}

.contact {
  text-align: center;
}

.contact-box {
  margin: 25px auto;
  background: #f7f8fb;
  padding: 25px;
  border-radius: 18px;
  max-width: 520px;
}

footer {
  background: #07162a;
  color: #ffffff;
  text-align: center;
  padding: 30px 0;
}

@media (max-width: 850px) {
  .nav-content {
    flex-direction: column;
    gap: 15px;
  }

  nav a {
    margin: 8px;
    display: inline-block;
  }

  .hero h1 {
    font-size: 40px;
  }

  .slogan {
    font-size: 22px;
  }

  .two-col,
  .grid,
  .checklist {
    grid-template-columns: 1fr;
  }

  .logo {
    max-height: 70px;
  }
}