body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: #333;
  background-color: #f8f9fa;
}

.navbar {
  background-color: #ffffff !important;
  box-shadow: 0 2px 4px rgba(0,0,0,.05);
}

.navbar-brand {
  font-weight: bold;
  color: #0056b3 !important;
  font-size: 1.8rem;
}

.nav-link {
  color: #333 !important;
  font-weight: 500;
  margin-right: 15px;
}

.nav-link:hover {
  color: #007bff !important;
}

.btn-primary {
  background-color: #007bff;
  border-color: #007bff;
  transition: all 0.3s ease;
}

.btn-primary:hover {
  background-color: #0056b3;
  border-color: #0056b3;
  transform: translateY(-2px);
}

.hero-section {
  background: linear-gradient(rgba(255,255,255,0.8), rgba(255,255,255,0.8)), url('https://via.placeholder.com/1500x500/e0f2f7/0056b3?text=Excel+Automation') no-repeat center center;
  background-size: cover;
  color: #333;
  padding: 0;
  position: relative;
  overflow: hidden;
}

.hero-section h1 {
  font-size: 3.8rem;
  font-weight: bold;
  margin-bottom: 20px;
  color: #0056b3;
}

.hero-section .lead {
  font-size: 1.6rem;
  margin-bottom: 30px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: bold;
  color: #0056b3;
  margin-bottom: 40px;
}

.card {
  border: none;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0,0,0,.08);
  transition: all 0.3s ease-in-out;
  background-color: #ffffff;
}

.card:hover {
  box-shadow: 0 8px 25px rgba(0,0,0,.15);
  transform: translateY(-5px);
}

.card-title {
  color: #ffffff;
  font-weight: 600;
}

.card-header {
  background-color: #007bff;
  color: white;
  font-weight: bold;
  border-top-left-radius: 10px;
  border-top-right-radius: 10px;
}

.accordion-button {
  font-weight: 600;
  color: #0056b3;
}

.accordion-button:not(.collapsed) {
  color: #007bff;
  background-color: #e0f2f7;
  box-shadow: inset 0 -1px 0 rgba(0,0,0,.125);
}

.accordion-button:focus {
  box-shadow: 0 0 0 0.25rem rgba(0, 123, 255, 0.25);
}

.carousel-control-prev-icon, .carousel-control-next-icon {
  background-color: #007bff;
  border-radius: 50%;
  padding: 15px;
}

footer {
  background-color: #212529 !important;
  color: white;
  padding: 40px 0;
}

footer h5 {
  color: #007bff;
  margin-bottom: 20px;
}

footer a {
  color: #adb5bd;
  text-decoration: none;
}

footer a:hover {
  color: #ffffff;
  text-decoration: underline;
}

.list-unstyled li {
  margin-bottom: 10px;
}

.text-muted {
  color: #6c757d !important;
}

.py-5 {
  padding-top: 3rem !important;
  padding-bottom: 3rem !important;
}

.mb-5 {
  margin-bottom: 3rem !important;
}

.mt-5 {
  margin-top: 3rem !important;
}

.mb-4 {
  margin-bottom: 1.5rem !important;
}

.p-3 {
  padding: 1rem !important;
}

.display-6 {
  font-size: 2.5rem;
}

.blockquote-footer {
  font-size: 0.9rem;
  color: #6c757d;
}

.blockquote-footer::before {
  content: "— ";
}