.hero-section {
    background-color: #ffffff;
    padding: 80px 0;
    margin-top: 56px;
}

.hero-section h1 {
    color: #ffffff;
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero-section .lead {
    color: #ffffff;
    font-size: 1.25rem;
}

/* Topics Section Styling */
.card {
    border: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
}

.card-title {
    color: #2c3e50;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-align: center;
}

.card ul li {
    margin-bottom: 0.5rem;
    color: #555;
}

/* Submission Guidelines Styling */
.submission-guidelines .card {
    background-color: #ffffff;
}

.submission-guidelines h3 {
    color: #2c3e50;
    border-bottom: 2px solid #3498db;
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
}

/* Important Dates Table Styling */
.table {
    margin-bottom: 0;
}

.table td {
    padding: 1rem;
    vertical-align: middle;
    border-color: #dee2e6;
}

.table td:first-child {
    font-weight: 600;
    color: #2c3e50;
}

/* Active state for Call for Paper nav link */
.navbar-nav .nav-item .dropdown-menu .dropdown-item.active {
    background-color: #3498db;
    color: white;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .hero-section {
        padding: 40px 0;
        margin-top: 48px;
    }

    .hero-section h1 {
        font-size: 1.8rem;
    }

    .hero-section .lead {
        font-size: 1.1rem;
    }

    .card {
        margin-bottom: 1.5rem;
        padding: 1rem;
    }

    .card-title {
        font-size: 1.4rem;
        margin-bottom: 1rem;
    }

    .card ul li {
        font-size: 0.95rem;
    }

    .submission-guidelines h3 {
        font-size: 1.5rem;
        margin-bottom: 0.8rem;
    }

    .table td {
        padding: 0.75rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 576px) {
    .hero-section {
        padding: 30px 0;
    }

    .hero-section h1 {
        font-size: 1.5rem;
    }

    .hero-section .lead {
        font-size: 1rem;
    }

    .card-title {
        font-size: 1.3rem;
    }

    .table td {
        padding: 0.5rem;
        font-size: 0.85rem;
    }
}