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

body {
  font-family: 'Roboto', sans-serif;
  color: #2b2f33;
  line-height: 1.6;
  background: #f6f8fb;
}

.container {
  max-width: 1200px;
  margin: auto;
  padding: 0 20px;
}

/* HERO */
.hero {
  background-image: url('https://static.vecteezy.com/system/resources/thumbnails/031/691/396/small_2x/chemistry-experiment-with-laboratory-flasks-ai-generative-free-photo.jpg');
  background-size: cover;
  background-position: center;
  height: 100vh;
  position: relative;
  color: white;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 40, 80, 0.75);
}

.navbar {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 30px 50px;
}

.logo img {
  height: 70px;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 30px;
}

nav a {
  color: white;
  text-decoration: none;
  font-weight: 500;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  top: 45%;              /* MOVED UP */
  transform: translateY(-50%);
}

.hero-content h1 {
  font-size: 3.8rem;
  margin-bottom: 15px;
}

.hero-content p {
  font-size: 1.4rem;
  margin-bottom: 35px;
}

.cta-button {
  background: #0ea5a4;
  color: white;
  padding: 14px 32px;
  text-decoration: none;
  border-radius: 5px;
  font-size: 1.1rem;
}

.cta-button:hover {
  background: #0284c7;
}

/* SECTIONS */
.section {
  padding: 90px 0;
  text-align: center;
  background: white;
}

.alt-bg {
  background: #f0f6ff;
}

.section h2 {
  font-size: 2.5rem;
  margin-bottom: 40px;
  color: #1f2937;
}

/* PRODUCTS */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
}

.product-card {
  background: white;
  padding: 40px;
  border-radius: 10px;
  border-top: 5px solid #0ea5a4;
  box-shadow: 0 10px 25px rgba(0,0,0,0.08);
}

/* CONTACT */
.contact-bg {
  background: linear-gradient(135deg, #eef6ff, #f0fdfa);
}

.contact-sub {
  font-size: 1.1rem;
  margin-bottom: 40px;
  color: #4b5563;
}

.contact-box {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-bottom: 40px;
}

.address {
  background: white;
  padding: 30px;
  border-radius: 10px;
  border-left: 5px solid #0ea5a4;
  box-shadow: 0 10px 20px rgba(0,0,0,0.06);
  text-align: left;
}

.address h3 {
  margin-bottom: 10px;
  color: #2563eb;
}

.contact-info {
  font-size: 1.1rem;
  margin-top: 20px;
}

/* FOOTER */
footer {
  background: #1f2937;
  color: #d1d5db;
  text-align: center;
  padding: 30px;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    gap: 20px;
  }

  .hero-content h1 {
    font-size: 2.6rem;
  }
}