* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  background: url("assets/background.jpg") no-repeat center center fixed;
  background-size: cover;
  transition: background 0.3s, color 0.3s;
  color: #222;
}
body.dark {
  background: #111;
  color: #eee;
  background: url("assets/background.jpg") no-repeat center center fixed;
  background-size: cover;
  transition: background 0.3s, color 0.3s;
}
.header {
  position: fixed;
  top: 0; width: 100%;
  background: rgba(205,205,205,0.9);
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 20px;
  backdrop-filter: blur(5px);
  z-index: 1000;
}
body.dark .header { background: rgba(30,30,30,0.9); }
.header .logo { display: flex; align-items: center; font-weight: bold; font-size: 20px; }
.header .logo img { height: 30px; margin-right: 10px; }
.header nav ul { list-style: none; display: flex; gap: 15px; }
.header nav ul li a {
  text-decoration: none; color: inherit; padding: 5px 10px;
  transition: 0.3s; border-radius: 5px;
}
.header nav ul li a.active, .header nav ul li a:hover { background: #007BFF; color: #fff; }
.hero { height: 100vh; display: flex; align-items: center; justify-content: center; text-align: center; }
.hero h1 { font-size: 2.5rem; color:white; }
.hero p { font-size: 1.2rem; color:white; }
.services { padding: 100px 20px; text-align: center; }
.cards { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; }
.card {
  background: rgba(205,205,205,0.85);
  padding: 20px; width: 250px;
  border-radius: 10px;
  transition: transform 0.3s;
}
body.dark .card { background: rgba(40,40,40,0.85); }
.card:hover { transform: translateY(-10px); }
.contact { padding: 80px 20px; text-align: center; color:white; }
.contact form {
  display: flex; flex-direction: column;
  max-width: 400px; margin: auto; gap: 10px;
}
.contact input, .contact textarea, .contact button {
  padding: 10px; border: 1px solid #ccc; border-radius: 5px;
}
.contact button {
  background: #007BFF; color: #fff; border: none; cursor: pointer;
}
.contact button:hover { background: #0056b3; }
.footer {
  position: fixed; bottom: 0; width: 100%;
  text-align: center; padding: 10px;
  background: rgba(205,205,205,0.9);
}
body.dark .footer { background: rgba(30,30,30,0.9); }
#scrollTop {
  position: fixed; bottom: 60px; right: 20px;
  display: none; padding: 10px;
  width:46px;height:46px;border-radius:8px;
  border: none;
  background: #007BFF; color: white; cursor: pointer;
}