:root {
  --blue: #1e90ff;
  --dark: #07111f;
  --yellow: #ffcc33;
  --white: #ffffff;
  --soft: #f4f8ff;
  --text: #172033;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--soft);
}

.hero {
  min-height: 85vh;
  background:
    linear-gradient(rgba(7, 17, 31, 0.78), rgba(7, 17, 31, 0.86)),
    radial-gradient(circle at top left, #1e90ff, transparent 35%),
    radial-gradient(circle at bottom right, #ffcc33, transparent 30%),
    var(--dark);
  color: var(--white);
  padding: 24px;
}

nav {
  max-width: 1100px;
  margin: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.nav-btn {
  color: var(--white);
  text-decoration: none;
  border: 1px solid var(--white);
  padding: 10px 18px;
  border-radius: 999px;
}

.hero-content {
  max-width: 850px;
  margin: 120px auto 40px;
  text-align: center;
}

.tagline {
  color: var(--yellow);
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 1px;
}

h1 {
  font-size: clamp(2.4rem, 7vw, 5rem);
  line-height: 1;
  margin: 18px 0;
}

.intro {
  font-size: 1.2rem;
  line-height: 1.7;
  max-width: 700px;
  margin: auto;
}

.buttons {
  margin-top: 32px;
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  text-decoration: none;
  padding: 14px 24px;
  border-radius: 999px;
  font-weight: bold;
}

.primary {
  background: var(--yellow);
  color: var(--dark);
}

.secondary {
  background: transparent;
  border: 1px solid var(--white);
  color: var(--white);
}

.section {
  max-width: 1100px;
  margin: auto;
  padding: 70px 24px;
  text-align: center;
}

.section h2 {
  font-size: 2.2rem;
  margin-bottom: 12px;
}

.section-text {
  max-width: 760px;
  margin: 0 auto 35px;
  line-height: 1.7;
  font-size: 1.05rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.product-card {
  background: var(--white);
  padding: 28px;
  border-radius: 22px;
  box-shadow: 0 12px 35px rgba(7, 17, 31, 0.08);
}

.image-placeholder {
  height: 150px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--blue), var(--yellow));
  display: grid;
  place-items: center;
  color: var(--white);
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: 18px;
}

.dark {
  max-width: none;
  background: var(--dark);
  color: var(--white);
}

.benefits {
  display: grid;
  gap: 12px;
  max-width: 650px;
  margin: auto;
  font-size: 1.15rem;
}

.contact-box {
  background: var(--white);
  max-width: 560px;
  margin: 24px auto;
  padding: 22px;
  border-radius: 18px;
  box-shadow: 0 12px 35px rgba(7, 17, 31, 0.08);
}

footer {
  background: #030812;
  color: #c9d2e3;
  padding: 24px;
  text-align: center;
  font-size: 0.85rem;
}

@media (max-width: 800px) {
  .hero-content {
    margin-top: 80px;
  }

  .cards {
    grid-template-columns: 1fr;
  }

  nav {
    gap: 15px;
  }
}