* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', sans-serif;
}

body {
  background: white;
  color: #333;
  line-height: 1.6;
}

.hero {
  background: url('https://via.placeholder.com/1600x400?text=HS11+Roofing+Ltd') center/cover no-repeat;
  position: relative;
  height: 300px;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
}

.overlay {
  background-color: rgba(255, 255, 255, 0.8);
  padding: 2rem;
}

nav {
  background: #003366;
  padding: 1rem;
}

nav ul {
  display: flex;
  justify-content: center;
  list-style: none;
}

nav a {
  color: white;
  margin: 0 15px;
  text-decoration: none;
  font-weight: bold;
}

nav a:hover {
  text-decoration: underline;
}

.section {
  padding: 3rem 2rem;
  max-width: 900px;
  margin: auto;
}

.gallery {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.placeholder {
  background: #ccc;
  height: 150px;
  width: 30%;
  text-align: center;
  line-height: 150px;
  font-weight: bold;
  color: #555;
}

.contact form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1rem;
}

.contact input,
.contact textarea {
  padding: 10px;
  font-size: 1rem;
  border: 1px solid #aaa;
}

.contact button {
  background: #003366;
  color: white;
  padding: 10px;
  border: none;
  cursor: pointer;
}

footer {
  text-align: center;
  padding: 1rem;
  background: #eee;
  font-size: 0.9rem;
}