/* ====== PAST CONFERENCES STYLES ====== */
.past-conferences {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    padding: 80px 20px;
    min-height: 70vh;
}

.past-conferences .container {
    max-width: 1200px;
    margin: 0 auto;
}

.past-conferences h2 {
    font-size: 2.8rem;
    color: #243658;
    text-align: center;
    margin-bottom: 50px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 2px;
    position: relative;
}

.past-conferences h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(135deg, #BE2633, #243658);
    border-radius: 2px;
}

.conference-intro {
    text-align: center;
    margin-bottom: 60px;
    font-size: 1.1rem;
    color: #4a5568;
    line-height: 1.6;
}

.conference-series {
    margin-bottom: 60px;
}

.series-title {
    font-size: 1.8rem;
    color: #243658;
    margin-bottom: 30px;
    font-weight: 700;
    border-left: 5px solid #BE2633;
    padding-left: 20px;
}

.conference-edition {
    background: white;
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.conference-edition:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.conference-edition.featured {
    border: 3px solid #BE2633;
    background: linear-gradient(135deg, rgba(190, 38, 51, 0.02), rgba(255, 255, 255, 1));
}

.edition-header {
    border-bottom: 2px solid #f1f5f9;
    padding-bottom: 20px;
    margin-bottom: 20px;
}

.edition-header h4 {
    font-size: 1.5rem;
    color: #243658;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.edition-badge {
    background: linear-gradient(135deg, #BE2633, #d63447);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

.edition-badge.latest {
    background: linear-gradient(135deg, #BE2633, #DC2626);
    animation: pulse-glow 2s infinite ease-in-out;
}

.edition-badge.success {
    background: linear-gradient(135deg, #3B82F6, #1D4ED8);
}

.edition-badge.inaugural {
    background: linear-gradient(135deg, #8B5CF6, #7C3AED);
}

.conference-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 10px;
}

.conference-meta span {
    color: #64748b;
    font-size: 0.9rem;
    font-weight: 500;
}

.status.published {
    color: #059669;
    font-weight: 600;
}

.conference-details p {
    color: #4a5568;
    margin-bottom: 15px;
    line-height: 1.6;
}

.conference-summary {
    background: linear-gradient(135deg, rgba(190, 38, 51, 0.05), rgba(36, 54, 88, 0.05));
    padding: 20px;
    border-radius: 10px;
    margin: 20px 0;
    border-left: 4px solid #BE2633;
}

.conference-links {
    display: flex;
    gap: 15px;
    margin: 20px 0;
    flex-wrap: wrap;
}

.btn-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: linear-gradient(135deg, #BE2633, #d63447);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    box-shadow: 0 3px 10px rgba(190, 38, 51, 0.3);
}

.btn-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(190, 38, 51, 0.4);
}

.btn-link.secondary {
    background: linear-gradient(135deg, #243658, #334155);
    box-shadow: 0 3px 10px rgba(36, 54, 88, 0.3);
}

.btn-link.tertiary {
    background: linear-gradient(135deg, #10B981, #059669);
    box-shadow: 0 3px 10px rgba(16, 185, 129, 0.3);
}

.conference-highlights h5,
.research-themes h5 {
    color: #243658;
    font-size: 1.1rem;
    margin-bottom: 15px;
    font-weight: 700;
}

.focus-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 10px;
    margin-top: 15px;
}

.focus-area {
    background: linear-gradient(135deg, rgba(190, 38, 51, 0.1), rgba(36, 54, 88, 0.1));
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    text-align: center;
    color: #243658;
}

.research-themes ul {
    list-style: none;
    padding: 0;
}

.research-themes li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
    color: #4a5568;
}

.research-themes li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: #BE2633;
    font-weight: bold;
}

.conference-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin: 25px 0;
    padding: 20px;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05), rgba(34, 197, 94, 0.05));
    border-radius: 12px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: #BE2633;
    margin-bottom: 5px;
}

.stat-label {
    color: #4a5568;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.5px;
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 8px rgba(190, 38, 51, 0.4);
    }
    50% {
        box-shadow: 0 0 20px rgba(190, 38, 51, 0.8);
    }
}

/* ====== RESPONSIVE DESIGN ====== */
@media (max-width: 767px) {
    .conference-meta {
        flex-direction: column;
        gap: 10px;
    }

    .conference-links {
        flex-direction: column;
    }

    .btn-link {
        justify-content: center;
    }

    .edition-header h4 {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .conference-stats {
        grid-template-columns: 1fr;
        gap: 15px;
    }
}

@media (max-width: 479px) {
    .past-conferences {
        padding: 60px 15px;
    }

    .past-conferences h2 {
        font-size: 2.2rem;
    }

    .conference-edition {
        padding: 20px;
    }
}