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

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  color: #222;
  line-height: 1.6;
  background: #fff;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: auto;
}

.header {
  background: #111;
  color: white;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav {
  min-height: 75px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-weight: 900;
  letter-spacing: 2px;
}

.logo span {
  display: block;
  font-size: 23px;
}

.logo small {
  font-size: 9px;
  letter-spacing: 3px;
}

nav {
  display: flex;
  gap: 28px;
}

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

nav a:hover {
  color: #f5a400;
}

.menu-btn {
  display: none;
  background: none;
  border: 0;
  color: white;
  font-size: 28px;
}

.hero {
  min-height: 680px;
  display: flex;
  align-items: center;
  background:
    linear-gradient(90deg, rgba(0,0,0,.85), rgba(0,0,0,.35)),
    url("images/construction.jpg") center/cover;
  color: white;
}

.hero-content {
  width: 90%;
  max-width: 1200px;
  margin: auto;
}

.small-title,
.section-label {
  color: #f5a400;
  font-weight: bold;
  letter-spacing: 2px;
}

.hero h1 {
  font-size: clamp(42px, 7vw, 78px);
  line-height: 1.05;
  margin: 15px 0;
}

.hero h1 span {
  color: #f5a400;
}

.hero p {
  max-width: 650px;
  font-size: 19px;
}

.hero-buttons {
  display: flex;
  gap: 15px;
  margin-top: 30px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  border: none;
  background: #f5a400;
  color: #111;
  padding: 14px 24px;
  text-decoration: none;
  font-weight: 900;
  cursor: pointer;
  border-radius: 4px;
}

.btn:hover {
  transform: translateY(-2px);
}

.whatsapp {
  background: #20b95c;
  color: white;
}

.section {
  padding: 90px 0;
}

.about {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

h2 {
  font-size: 42px;
  line-height: 1.15;
  margin: 10px 0 20px;
}

.about p {
  margin-bottom: 20px;
}

.about-box {
  background: #111;
  color: white;
  padding: 45px;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 20px;
}

.about-box strong {
  color: #f5a400;
  font-size: 22px;
}

.services-section {
  background: #f5f5f5;
}

.section-heading {
  text-align: center;
  max-width: 700px;
  margin: auto auto 50px;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.service-card {
  background: white;
  padding: 30px;
  border: 1px solid #ddd;
  transition: .3s;
}

.service-card:hover {
  transform: translateY(-7px);
  box-shadow: 0 15px 35px rgba(0,0,0,.1);
}

.icon {
  font-size: 40px;
  margin-bottom: 15px;
}

.service-card h3 {
  margin-bottom: 10px;
}

.projects {
  padding: 90px 0;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
  margin-top: 35px;
}

.project {
  border: 1px solid #ddd;
  background: white;
}

.project-image {
  height: 240px;
  background: #333;
  color: #f5a400;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 28px;
  font-weight: bold;
}

.project h3,
.project p {
  padding: 0 20px;
}

.project h3 {
  margin-top: 18px;
}

.project p {
  padding-bottom: 20px;
}

.cta {
  background: #111;
  color: white;
  padding: 80px 0;
  text-align: center;
}

.cta h2 {
  color: white;
}

.contact {
  background: #f5f5f5;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contact-info {
  margin-top: 30px;
}

.contact-info p {
  margin: 15px 0;
}

.contact-info a {
  color: #111;
  font-weight: bold;
}

form {
  background: white;
  padding: 35px;
  box-shadow: 0 10px 35px rgba(0,0,0,.08);
}

input,
select,
textarea {
  width: 100%;
  padding: 14px;
  margin-bottom: 15px;
  border: 1px solid #ccc;
  font-size: 16px;
  font-family: inherit;
}

textarea {
  resize: vertical;
}

footer {
  background: #090909;
  color: white;
  padding: 40px 0;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

.floating-whatsapp {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 60px;
  height: 60px;
  background: #20b95c;
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-size: 28px;
  z-index: 999;
}

@media (max-width: 900px) {

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about,
  .contact-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 650px) {

  .menu-btn {
    display: block;
  }

  nav {
    display: none;
    position: absolute;
    top: 75px;
    left: 0;
    width: 100%;
    background: #111;
    flex-direction: column;
    padding: 20px;
  }

  nav.active {
    display: flex;
  }

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

  .hero {
    min-height: 600px;
  }

  .hero h1 {
    font-size: 43px;
  }

  h2 {
    font-size: 34px;
  }

  .footer {
    flex-direction: column;
  }

  .about-box {
    grid-template-columns: 1fr;
  }
}