/* CSS Reset */
*,
*::before,
*::after {
  margin: 0; padding: 0; box-sizing: border-box;
}

/* Body & background */
body {
  font-family: 'Montserrat', sans-serif;
  background: #0a1e4d; /* donkerblauw */
  color: #1545a1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
}

/* Container */
.container {
  max-width: 900px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

/* Navbar */
.navbar {
  background-color: #1545a1; /* helder blauw */
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 4px solid #3ea1ff; /* lichtblauw accent */
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 3px 6px rgba(0, 65, 153, 0.6);
  

}

.navbar-brand {
  display: flex;
  align-items: center;
  color:white
}


.navbar-brand {
  font-weight: 900;
  font-size: 1.9rem;
  color: #1545a1;
  letter-spacing: 3px;
  text-transform: uppercase;
}

.navbar-nav {
  display: flex;
  gap: 2rem;
}

.nav-link {
  color: #cbe3ff;
  font-weight: 600;
  text-transform: uppercase;
  border-bottom: 3px solid transparent;
  padding-bottom: 4px;
  transition: all 0.3s ease;
  cursor: pointer;
}

.nav-link:hover,
.nav-link.active {
  color: #3ea1ff;
  border-bottom-color: #3ea1ff;
}

/* Pagina titel */
h1 {
  font-weight: 900;
  font-size: 3rem;
  text-align: center;
  margin-bottom: 3rem;
  color: #ffffff;
  letter-spacing: 6px;
  text-shadow: 0 0 10px #3ea1ffaa;
}

/* Cards stacked vertically */
.card {
  background-color: #1954d6; /* medium blauw */
  border: 2px solid #3ea1ff;
  box-shadow: 0 0 20px #3ea1ff77;
  width: 100%;
  padding: 1.5rem 2rem;
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  color: #e1ecff;
  user-select: none;
  border-radius: 0;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: scale(1.02);
  box-shadow: 0 0 40px #3ea1ffcc;
}

.card-header {
  font-weight: 800;
  font-size: 1.4rem;
  margin-bottom: 1rem;
  color: #b0d7ff;
  text-transform: uppercase;
  border-bottom: 2px solid #3ea1ff;
  padding-bottom: 0.5rem;
}

.card-body {
  flex-grow: 1;
  font-size: 1rem;
  color: #dbe8ff;
}

/* List group */
.list-group-item {
  background-color: #1545a1;
  color: #a3c9ff;
  border: none;
  font-family: monospace;
  font-weight: 700;
  padding: 0.6rem 1.2rem;
  border-bottom: 1px solid #3ea1ff;
  cursor: default;
  transition: background-color 0.3s ease;
}

.list-group-item:last-child {
  border-bottom: none;
}

.list-group-item:hover {
  background-color: #3ea1ff;
  color: #0a1e4d;
}

/* Footer */
footer {
  background-color: #1545a1;
  color: #3ea1ff;
  padding: 1.5rem 0;
  text-align: center;
  font-weight: 700;
  letter-spacing: 1.3px;
  border-top: 4px solid #3ea1ff;
  user-select: none;
  box-shadow: 0 -4px 8px rgba(21, 69, 161, 0.7);
}

/* Responsive */
@media (max-width: 768px) {
  .navbar-nav {
    flex-direction: column;
    gap: 1.2rem;
  }
  h1 {
    font-size: 2.4rem;
  }
}