:root {
  --primary-blue: #5caeff;
}
body {
  background-color: #f4f9fc;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.navbar {
  background-color: var(--primary-blue);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.navbar-brand img {
  height: 40px;
}
.nav-link {
  padding: var(--bs-nav-link-padding-y)+5px var(--bs-nav-link-padding-x);
}

section {
  padding-top:70px;
}
.section-title {
  color: var(--primary-blue);
  font-weight: 600;
}
.highlight {
  color: var(--primary-blue);
  font-weight: bold;
}
footer {
  background-color: #e3f2fd;
  padding: 2rem 0;
  text-align: center;
}
.card {
  border: none;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  transition: transform 0.2s ease;
}
.card:hover {
  transform: translateY(-5px);
}
.hero {
  background: linear-gradient(145deg, #d7efff, #f4f9fc);
  padding-top: 80px;
  padding-bottom: 30px;
  text-align: center;
}

.back-to-top {
  position: fixed;
  visibility: hidden;
  opacity: 0;
  right: 15px;
  bottom: 15px;
  z-index: 99999;
  background: #428bca;
  width: 40px;
  height: 40px;
  border-radius: 4px;
  transition: all 0.4s;
}
.back-to-top i {
  font-size: 24px;
  color: #fff;
  line-height: 0;
}
.back-to-top:hover {
  background: #629fd3;
  color: #fff;
}
.back-to-top.active {
  visibility: visible;
  opacity: 1;
}