.requirements-hero {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('/images/requirements-bg.jpg');
    background-size: cover;
    background-position: center;
    padding: 6rem 0;
    color: white;
    text-align: center;
    margin-bottom: 4rem;
}

.requirements-hero h1 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    animation: fadeInUp 1s ease-out;
}

.requirements-hero p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
    animation: fadeInUp 1s ease-out 0.3s;
    animation-fill-mode: both;
}

.requirements-section {
    padding: 4rem 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.requirements-grid {
    display: grid;
    gap: 2rem;
    margin-bottom: 3rem;
}

.requirements-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    overflow: hidden;
    transition: transform 0.3s ease;
}

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

.card-header {
    background: linear-gradient(135deg, #1a237e 0%, #0d47a1 100%);
    color: white;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.card-header i {
    font-size: 1.5rem;
}

.card-header h3 {
    margin: 0;
    font-size: 1.5rem;
}

.general-requirements ul {
    list-style: none;
    padding: 2rem;
    margin: 0;
}

.general-requirements li {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid #eee;
}

.general-requirements li:last-child {
    border-bottom: none;
}

.general-requirements li i {
    color: #1a237e;
    margin-top: 0.3rem;
}

.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    padding: 2rem;
}

.topic-group {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.topic-group:hover {
    background: #e9ecef;
}

.topic-group h4 {
    color: #1a237e;
    margin-bottom: 1rem;
    font-size: 1.2rem;
    border-bottom: 2px solid #1a237e;
    padding-bottom: 0.5rem;
}

.topic-group ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.topic-group li {
    padding: 0.5rem 0;
    color: #495057;
    font-size: 0.95rem;
    position: relative;
    padding-left: 1.2rem;
}

.topic-group li::before {
    content: '•';
    color: #1a237e;
    position: absolute;
    left: 0;
}

.important-note {
    background: #e3f2fd;
    border-radius: 10px;
    padding: 1.5rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.important-note i {
    color: #1a237e;
    font-size: 1.5rem;
}

.important-note h4 {
    color: #1a237e;
    margin: 0 0 0.5rem 0;
}

.important-note p {
    margin: 0;
    color: #444;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    .requirements-hero h1 {
        font-size: 2rem;
    }
    
    .requirements-hero p {
        font-size: 1rem;
        padding: 0 1rem;
    }
    
    .requirements-section {
        padding: 2rem 0;
    }
    
    .topics-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .card-header {
        padding: 1rem;
    }
    
    .card-header h3 {
        font-size: 1.3rem;
    }
    
    .general-requirements li {
        font-size: 0.95rem;
    }
}

/* Call for Papers Section Styles */
.call-for-papers-section {
    padding: 4rem 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.call-for-papers-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    overflow: hidden;
    transition: transform 0.3s ease;
    margin-bottom: 3rem;
}

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

.call-for-papers-card .card-header {
    background: linear-gradient(135deg, #1a237e 0%, #0d47a1 100%);
    color: white;
    padding: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.call-for-papers-card .card-header i {
    font-size: 2rem;
}

.call-for-papers-card .card-header h2 {
    margin: 0;
    font-size: 2rem;
    font-weight: 600;
}

.call-for-papers-content {
    padding: 2rem;
}

.intro-text p {
    margin-bottom: 1rem;
    line-height: 1.6;
    color: #333;
    font-size: 1.1rem;
}

.intro-text p strong {
    color: #1a237e;
}

.important-dates {
    background: #e3f2fd;
    border-radius: 10px;
    padding: 1.5rem;
    margin: 2rem 0;
}

.important-dates h3 {
    color: #1a237e;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.3rem;
}

.important-dates ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.important-dates li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #bbdefb;
    color: #333;
    font-size: 1rem;
}

.important-dates li:last-child {
    border-bottom: none;
}

.important-dates li strong {
    color: #1a237e;
}

.submission-info {
    background: #f3e5f5;
    border-radius: 10px;
    padding: 1.5rem;
    margin: 2rem 0;
}

.submission-info p {
    margin-bottom: 1rem;
    line-height: 1.6;
    color: #333;
    font-size: 1.1rem;
}

.submission-info p strong {
    color: #7b1fa2;
}

.topics-overview {
    margin: 2rem 0;
}

.topics-overview h3 {
    color: #1a237e;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.3rem;
}

.topics-list ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 0.5rem;
}

.topics-list li {
    padding: 0.75rem;
    background: #f8f9fa;
    border-radius: 8px;
    color: #495057;
    font-size: 0.95rem;
    position: relative;
    padding-left: 1.5rem;
    transition: all 0.3s ease;
}

.topics-list li:hover {
    background: #e9ecef;
    transform: translateX(5px);
}

.topics-list li::before {
    content: '•';
    color: #1a237e;
    position: absolute;
    left: 0.5rem;
    font-weight: bold;
}

.closing-message {
    background: #e8f5e8;
    border-radius: 10px;
    padding: 1.5rem;
    margin-top: 2rem;
    text-align: center;
}

.closing-message p {
    margin: 0;
    color: #2e7d32;
    font-size: 1.1rem;
    font-weight: 500;
}

/* Responsive adjustments for call for papers section */
@media (max-width: 768px) {
    .call-for-papers-card .card-header {
        padding: 1.5rem;
    }
    
    .call-for-papers-card .card-header h2 {
        font-size: 1.5rem;
    }
    
    .call-for-papers-content {
        padding: 1.5rem;
    }
    
    .intro-text p {
        font-size: 1rem;
    }
    
    .topics-list ul {
        grid-template-columns: 1fr;
    }
    
    .important-dates h3,
    .topics-overview h3 {
        font-size: 1.2rem;
    }
}