body {
  font-family: 'Poppins', sans-serif;
  scroll-behavior: smooth;
  transition: background-color 0.4s, color 0.4s;
}

/* Hero Section */
.hero-section {
  height: 100vh;
  background: url('https://images.unsplash.com/photo-1525182008055-f88b95ff7980?auto=format&fit=crop&w=1920&q=80') no-repeat center center/cover;
  position: relative;
  color: white;
}
.hero-section .overlay {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.6);
}
.hero-section .content { position: relative; z-index: 1; }

/* Services */
.service-card {
  border: none;
  border-radius: 10px;
  background: white;
  transition: transform 0.4s, box-shadow 0.4s;
}
.service-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

/* Portfolio */
.portfolio-card {
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.portfolio-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

/* Team */
.team-member img {
  transition: transform 0.3s;
}
.team-member:hover img {
  transform: scale(1.1);
}

/* Testimonials */
#testimonials {
  background: linear-gradient(135deg, #007bff, #6610f2);
  color: white;
}
.carousel-item blockquote {
  font-size: 1.2rem;
  font-style: italic;
}

/* Client Logos */
.grayscale {
  filter: grayscale(100%);
  transition: 0.3s;
}
.grayscale:hover {
  filter: grayscale(0);
}

/* Contact Form */
form input, form textarea {
  border-radius: 8px;
  border: 1px solid #ccc;
}
form input:focus, form textarea:focus {
  border-color: #007bff;
  box-shadow: 0 0 8px rgba(0, 123, 255, 0.4);
}
.animated-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0, 123, 255, 0.4);
}

/* Technologies */
#tools img {
  filter: grayscale(80%);
  transition: transform 0.3s ease, filter 0.3s ease;
}
#tools img:hover {
  transform: scale(1.2);
  filter: grayscale(0%);
}

/* Dark Mode */
.dark-mode {
  background-color: #121212;
  color: #eee;
}
.dark-mode .navbar, .dark-mode footer { background-color: #000; }
.dark-mode .service-card, .dark-mode .team-member { background: #1f1f1f; color: #ddd; }
.dark-mode .grayscale { filter: none; opacity: 0.8; }
.dark-mode form input, .dark-mode form textarea { background-color: #222; color: #fff; border-color: #444; }

/* Responsive Adjustments */
@media (max-width: 768px) {
  .hero-section { text-align: center; padding: 50px 20px; }
  .portfolio-card img { width: 100%; }
}