* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  text-decoration: none;
  list-style: none;
  scroll-behavior: smooth;
  font-family: "Roboto", sans-serif;
}
/* Navbar Start */
#navbar {
  background-color: #9d9da0;
}
#logo {
  font-size: 32px;
  font-weight: 350;
  color: #037244;
  text-shadow: 1px 1px 1px rgb(0, 0, 0);
  margin-bottom: 1px;
}

.nav-item .nav-link:hover {
  background: #037244;
  color: white;
}

.nav-item .nav-link {
  font-size: 18px;
  font-weight: 550;
  color: rgb(250, 250, 250);
  letter-spacing: 1px;
  border-radius: 3px;
  transition: 0.5s ease;
}

#navbar form button {
  background: #037244;
  color: white;
  border: none;
}

#navbar form button:hover {
  background: #025d33;
  transform: scale(1.05);
  cursor: pointer;
}



.home {
  padding-top: 100px;
  width: 100%;
  height: 100vh;
  background-image: linear-gradient(
      rgba(0, 0, 0, 0.3),
      rgba(129, 124, 124, 0.2)
    ),
    url(https://github.com/jaysonmelecio90/Website-Picture/blob/main/homebackground.png?raw=true);
  background-repeat: no-repeat;
  background-size: cover;

  /* Center content */
  display: flex;
  justify-content: center; /* horizontal center */
  align-items: center; /* vertical center */
  text-align: center;
  flex-direction: column; /* keep heading stacked */
}

.home .content h5 {
  color: white;
  font-size: 38px;
  font-weight: 550;
  text-shadow: 0px 1px 1px black;
}

.home .content h1 {
  color: white;
  font-size: 70px;
  font-weight: 550;
  text-shadow: 0px 1px 1px black;
  margin-top: 5px;
}

.changecontent::after {
  content: " ";
  color: #ffa500;
  text-shadow: 0px 1px 1px black;
  animation: changetext 10s infinite linear;
}
@keyframes changetext {
  0% {
    content: "Column";
  }
  20% {
    content: "Beam";
  }
  40% {
    content: "Foundation";
  }
  60% {
    content: "Slab";
  }
  80% {
    content: "Retaining Wall";
  }
  100% {
    content: "Steel";
  }
}

.home .content p {
  color: white;
  font-size: 18px;
  font-weight: 600;
  text-shadow: 0px 1px 1px black;
  margin-bottom: 30px;
  margin-top: 5px;
}

.home .download-btn {
  display: inline-block;
  padding: 10px 20px;
  margin: 10px 0;
  font-size: 16px;
  font-weight: bold;
  color: white;
  background-color: #0078d7;
  text-decoration: none;
  border-radius: 6px;
  transition: background-color 0.3s ease;
}

.home .download-btn:hover {
  background-color: #134e20ee;
}

@media (max-width: 850px) {
  .home {
    background-position: 50%;
  }
}

@media (max-width: 450px) {
  .home .content h5 {
    font-size: 25px;
  }
  .home .content h1 {
    font-size: 38px;
  }
  .home .content p {
    font-size: 13px;
  }
}

.packages {
  padding-top: 20px;
}

.main-txt h1 {
  text-align: center;
  margin-top: 30px;
  font-weight: 600;
  text-shadow: 0px 1px 1px black;
}
.main-txt h1 span {
  color: #037244;
}

.book .card {
  border-radius: 10px;
  box-shadow: 0px 5px 5px -6px black;
}

/* About Start */
.about {
  padding: 50px;
  margin-top: 50px;
  background: #f9f9f9;
}
.about .card {
  border-radius: 10px;
}
.about .card img {
  border-radius: 10px;
}
.about h2 {
  font-weight: 600;
  letter-spacing: 1px;
}
.about p {
  font-weight: 500;
}
#about-btn {
  width: 150px;
  height: 38px;
  border: none;
  border-radius: 5px;
  background: #037244;
  color: white;
  letter-spacing: 1px;
  font-weight: 550;
  transition: 0.5s ease;
  cursor: pointer;
}
#about-btn:hover {
  width: 170px;
}
@media (max-width: 765px) {
  .about {
    padding: 0;
  }
}




/* Footer Start */
#footer {
  width: 100%;
  margin-top: 150px;
  text-align: center;
  background: #d6d3d3;
}
#footer h1 {
  font-weight: 600;
  padding-top: 30px;
  text-shadow: 0px 0px 1px black;
}
#footer h1 span {
  color: #037244;
}
.social-links i {
  padding: 10px;
  border-radius: 5px;
  font-size: 20px;
  background: black;
  color: white;
  margin-left: 10px;
  margin-bottom: 10px;
  transition: 0.5s ease;
  cursor: pointer;
}
.social-links i:hover {
  background: #ffa500;
}