/* Input Section */
        .input-section {
            max-width: 800px;
            margin: 2rem auto;
            padding: 2rem;
            background: white;
            border-radius: 16px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
        }

        .input-header {
            text-align: center;
            margin-bottom: 2rem;
            background: var(--secondary-color) !important;
        }

        .input-title {
            font-size: 2rem;
            font-weight: 700;
            margin: 0 0 0.5rem;
            color: var(--gray-50) !important;
            background: var(--secondary-color)) !important;
        }

        .input-subtitle {
            color: var(--gray-50);
            font-size: 1.1rem;
        }

        .search-input-group {
            display: flex;
            gap: 1rem;
            margin-bottom: 1rem;
        }

        .search-textarea {
            flex: 1;
            padding: 1rem;
            border: 2px solid var(--gray-200);
            border-radius: 12px;
            font-size: 1rem;
            resize: none;
            min-height: 100px;
            transition: border-color 0.3s;
        }

        .search-textarea:focus {
            outline: none;
            border-color: var(--primary-color);
        }

        .analyze-btn {
            padding: 1rem 2rem;
            background: var(--primary-color);
            color: white;
            border: none;
            border-radius: 12px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .analyze-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 16px rgba(190, 46, 120, 0.3);
        }

        .btn {
            padding: 0.75rem 1.5rem;
            border: none;
            border-radius: 8px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        .btn-secondary {
            background: var(--gray-100);
            color: var(--gray-700);
        }

        .btn-secondary:hover {
            background: var(--gray-200);
        }

        .btn-primary {
            background: var(--primary-color);
            color: white;
        }

        .btn-primary:hover {
            background: #a02060;
            transform: translateY(-1px);
        }

        /* Topics Section */
        .topics-section {
            display: none;
            max-width: 800px;
            margin: 2rem auto;
            padding: 2rem;
            background: white;
            border-radius: 16px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
        }

        .topics-header {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .topic-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            margin-bottom: 1.5rem;
        }

        .topic-tag {
            padding: 0.5rem 1rem;
            background: var(--gray-100);
            border: 2px solid transparent;
            border-radius: 24px;
            cursor: pointer;
            transition: all 0.2s;
            font-size: 0.9rem;
        }

        .topic-tag:hover {
            background: var(--gray-200);
        }

        .topic-tag.selected {
            background: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }

        /* Radar Visualization */
        .radar-visualization {
            display: none;
            max-width: 1200px;
            margin: 2rem auto;
            padding: 2rem;
            background: white;
            border-radius: 16px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
        }

        .radar-header {
            text-align: center;
            margin-bottom: 2rem;
        }

        .radar-title {
            font-size: 1.8rem;
            font-weight: 700;
            margin: 0 0 0.5rem;
        }

        .radar-subtitle {
            color: var(--gray-600);
        }

        .radar-legend {
            display: flex;
            justify-content: center;
            gap: 2rem;
            margin-bottom: 2rem;
            flex-wrap: wrap;
        }

        .legend-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.9rem;
            color: var(--gray-600);
        }

        .legend-dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
        }

        .radar-svg-container {
            position: relative;
            display: flex;
            justify-content: center;
            margin-bottom: 2rem;
        }

        .radar-tooltip {
            position: absolute;
            background: var(--gray-900);
            color: white;
            padding: 0.75rem;
            border-radius: 8px;
            font-size: 0.875rem;
            pointer-events: none;
            opacity: 0;
            transition: opacity 0.2s;
            z-index: 100;
            max-width: 250px;
        }

        .radar-tooltip.show {
            opacity: 1;
        }

        .tooltip-title {
            font-weight: 600;
            margin-bottom: 0.5rem;
        }

        .tooltip-details {
            display: flex;
            flex-direction: column;
            gap: 0.25rem;
        }

        .contributor-item {
            cursor: pointer;
            transition: transform 0.2s;
        }

        .contributor-item:hover {
            transform: scale(1.2);
        }

        /* Contributor Profile Modal */
        .profile-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1000;
            overflow-y: auto;
        }

        .profile-container {
            max-width: 1000px;
            margin: 2rem auto;
            background: white;
            border-radius: 16px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
            overflow: hidden;
        }

        .profile-header {
            background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
            color: white;
            padding: 3rem 2rem 2rem;
            position: relative;
        }

        .close-btn {
            position: absolute;
            top: 1rem;
            right: 1rem;
            background: rgba(255, 255, 255, 0.2);
            border: none;
            color: white;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background 0.2s;
        }

        .close-btn:hover {
            background: rgba(255, 255, 255, 0.3);
        }

        .profile-info {
            display: flex;
            gap: 2rem;
            align-items: start;
        }

        .profile-avatar {
            width: 120px;
            height: 120px;
            border-radius: 50%;
            background: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 3rem;
            color: var(--primary-color);
            border: 4px solid white;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }

        .profile-details h2 {
            margin: 0 0 0.5rem;
            font-size: 2rem;
        }

        .profile-meta {
            display: flex;
            gap: 1.5rem;
            margin-bottom: 1rem;
            flex-wrap: wrap;
        }

        .profile-meta-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.9rem;
        }

        .profile-bio {
            margin-top: 1rem;
            line-height: 1.6;
            opacity: 0.9;
        }

        .profile-badges {
            display: flex;
            gap: 0.75rem;
            margin-top: 1rem;
            flex-wrap: wrap;
        }

        .badge-box {
            padding: 0.25rem 0.75rem;
            background: rgba(255, 255, 255, 0.2);
            border-radius: 20px;
            font-size: 0.85rem;
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }

        .profile-content {
            padding: 2rem;
        }

        .profile-section {
            margin-bottom: 3rem;
        }

        .section-title {
            font-size: 1.3rem;
            font-weight: 600;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 1rem;
            margin-bottom: 2rem;
        }

        .stat-card {
            background: var(--gray-50);
            padding: 1rem;
            border-radius: 12px;
            text-align: center;
            border: 1px solid var(--gray-200);
        }

        .stat-value {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary-color);
        }

        .stat-label {
            color: var(--gray-600);
            font-size: 0.9rem;
        }

        .nanopub-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1rem;
        }

        .nanopub-card {
            background: var(--gray-50);
            padding: 1.5rem;
            border-radius: 12px;
            border: 1px solid var(--gray-200);
            transition: transform 0.2s, box-shadow 0.2s;
        }

        .nanopub-card:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }

        .nanopub-title {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--secondary-color);
        }

        .nanopub-meta {
            font-size: 0.85rem;
            color: var(--gray-600);
            display: flex;
            justify-content: space-between;
            margin-top: 0.75rem;
        }

        .heatmap-container {
            background: var(--gray-50);
            padding: 1rem;
            border-radius: 12px;
            border: 1px solid var(--gray-200);
            overflow-x: auto;
        }

        .heatmap {
            display: grid;
            grid-template-columns: auto repeat(52, 1fr);
            gap: 2px;
            font-size: 0.75rem;
        }

        .heatmap-cell {
            width: 12px;
            height: 12px;
            background: var(--gray-200);
            border-radius: 2px;
            cursor: pointer;
            transition: transform 0.2s;
        }

        .heatmap-cell:hover {
            transform: scale(1.3);
        }

        .heatmap-cell.low { background: #c6f7e2; }
        .heatmap-cell.medium { background: #6ee7b7; }
        .heatmap-cell.high { background: #10b981; }
        .heatmap-cell.very-high { background: #047857; }

        .activity-chart {
            height: 300px;
            background: var(--gray-50);
            border-radius: 12px;
            padding: 1rem;
            display: flex;
            justify-content: center;
            align-items: center;
            color: var(--gray-500);
        }

        .loading {
            display: inline-block;
            width: 16px;
            height: 16px;
            border: 2px solid #f3f3f3;
            border-top: 2px solid var(--primary-color);
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }