body {
    font-family: Arial, sans-serif;
    margin: 0; /* Ensure there is no margin around the body */
    padding: 0; /* Ensure there is no padding around the body */
}

.bg-darkblue {
    background-color: #0a1f44; /* Dark Blue */
}

.bg-purple {
    background-color: #660066; /* Purple */
}

.text-yellow {
    color: #ffd700; /* Yellow */
}

.navbar-dark .navbar-nav .nav-link {
    color: white;
}

.navbar {
    margin-bottom: 0; /* Remove bottom margin from the navbar */
}

.header-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-top: 5em;
}

.header-image {
    width: 100%;
    /* max-width: 600px; */
    height: auto;
    padding-top: 1em;
}

.header-text {
    position: sticky;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 1.2rem;
    text-align: right;
}

section {
    padding: 60px 0;
}

section:first-of-type {
    margin-top: 30px; /* Add margin to the first section for spacing */
}

footer {
    background-color: #0a1f44; /* Dark Blue */
}

#back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: #0a1f44;
    color: white;
    padding: 10px 15px;
    border-radius: 50%;
    text-align: center;
    display: none; /* Initially hidden */
    z-index: 1000; /* Ensure it's above other elements */
}

#back-to-top:hover {
    background-color: #ffd700; /* Yellow */
}

#back-to-top i {
    font-size: 24px;
}

/* The following codes are for the photo of the speakers */

/* Responsive images */
.card-img-top {
    width: 100%;
    height: auto;
}

/* Limit image size on smaller screens */
@media (max-width: 576px) {
    .card-img-top {
        max-width: 300px; /* Adjust this value as needed */
        margin: 0 auto; /* Center the image */
    }
}

/* Adjusting submenu position to the left */
.nav-item .dropdown-menu > .dropdown-menu {
  left: -100%; /* Shift the submenu to the left of the parent */
  top: 0;
  margin-left: 0; /* No margin for precise alignment */
  min-width: 200px; /* Ensure a minimum width */
}

.dropdown-item {
  white-space: nowrap; /* Prevent text from wrapping */
}