:root {
  --charcoal: #333333;
  --steel: #555555;
  --light-brown: #c19a6b;
  --white: #ffffff;
}
html {
  scroll-behavior: smooth;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: 'Open Sans', sans-serif;
  color: var(--charcoal);
  background: var(--white);
  line-height: 1.6;
}
h1, h2, h3 {
  font-family: 'Montserrat', sans-serif;
  color: var(--charcoal);
  margin-bottom: 1rem;
}
header.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  background-image: url('construction-silhouette.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  color: var(--white);
  padding: 0 1rem;
}
header.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 0;
}
.hero > * {
  position: relative;
  z-index: 1;
}
.hero img.logo {
  max-width: 200px;
  width: 100%;
  height: auto;
  margin-bottom: 1rem;
}
.call-now {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--charcoal);
  padding: 0.5rem 1rem;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 600;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
  transition: background 0.3s, color 0.3s;
}
.call-now:hover {
  background: var(--light-brown);
  color: var(--white);
}
.btn {
  background: var(--light-brown);
  color: var(--white);
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  border-radius: 4px;
  font-weight: 600;
  display: inline-block;
  border: none;
  cursor: pointer;
}
section {
  padding: 4rem 1rem;
  max-width: 1100px;
  margin: auto;
}
section:nth-of-type(even) {
  background: #f7f7f7;
}
section h2 {
  font-size: 2rem;
  text-align: center;
  margin-bottom: 2rem;
  transition: color 0.3s;
}
section h2:hover {
  color: var(--light-brown);
}
.quote {
  font-style: italic;
  margin-top: 1rem;
  color: var(--steel);
  text-align: center;
}
.expertise-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  text-align: center;
}
.expertise-grid div, #services ul li {
  background: var(--white);
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  transition: transform 0.3s, box-shadow 0.3s;
}
.expertise-grid div:hover, #services ul li:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.projects-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}
.project-card {
  background: #fff;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  border-radius: 4px;
  overflow: hidden;
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
}
.project-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.project-card img {
  width: 100%;
  height: auto;
  display: block;
}

.split {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.split-image,
.split-content {
  flex: 1;
}
.split-image img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  display: block;
}
.signature {
  margin-top: 1rem;
  font-style: italic;
}
.caption {
  display: block;
  text-align: center;
  font-size: 0.9rem;
  color: var(--steel);
  margin-top: 0.5rem;
}
figure {
  margin: 0;
}
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}
#backToTop {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--light-brown);
  color: var(--white);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: none;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
}
#backToTop:hover {
  background: var(--charcoal);
}
@media (max-width: 600px) {
  .call-now {
    top: 10px;
    right: 10px;
    font-size: 0.8rem;
  }
}
ul {
  padding-left: 1.2rem;
}
footer {
  background: var(--charcoal);
  color: var(--white);
  text-align: center;
  padding: 2rem 1rem;
}
@media (max-width: 768px) {
  section {
    padding: 3rem 1rem;
  }
  .split {
    flex-direction: column;
  }
}
@media (max-width: 480px) {
  .hero p {
    font-size: 1rem;
  }
}