body {
  font-family: 'Inter', sans-serif;
  margin: 0;
  padding: 0;
  background: #fafafa;
  color: #111;
}
.container {
  width: 90%;
  max-width: 1100px;
  margin: auto;
  padding: 2rem 0;
}
.hero {
  background: #0d1b2a;
  color: #fff;
  text-align: center;
  padding: 4rem 2rem;
}
.hero .button {
  margin-top: 1.5rem;
  display: inline-block;
  background: #1d4ed8;
  color: #fff;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  text-decoration: none;
}
h1 {
  font-size: 2.5rem;
  margin: 0 0 1rem 0;
}
h2 {
  font-size: 1.8rem;
  color: #0f172a;
}
h3 {
  margin: 0.5rem 0;
}
.about, .advantages, .contact, .catalog {
  background: #fff;
  margin-bottom: 2rem;
  padding: 2rem;
  border-radius: 10px;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}
.item {
  background: #f8f9fa;
  padding: 1rem;
  border-radius: 8px;
  text-align: center;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}
.item img {
  width: 100%;
  height: auto;
  border-radius: 6px;
}
ul {
  list-style: none;
  padding: 0;
  line-height: 1.8;
}
form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
input, textarea {
  padding: 0.75rem;
  font-size: 1rem;
  border: 1px solid #ccc;
  border-radius: 6px;
}
button {
  background: #1e3a8a;
  color: white;
  padding: 0.75rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}
footer {
  background: #f1f5f9;
  text-align: center;
  padding: 2rem 1rem;
  font-size: 0.9rem;
  color: #555;
}