.papers-grid {
    display: grid;
    gap: 1.5rem;
}

.paper-card {
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 1.5rem;
    background: #fafafa;
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.paper-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 0.5rem;
}

.paper-subtitle {
    font-size: 1rem;
    color: #666;
    margin-bottom: 1rem;
    font-style: italic;
}

.paper-meta {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    font-size: 0.9rem;
    color: #666;
}

.paper-meta-item {
    display: flex;
    flex-direction: column;
}

.paper-meta-label {
    font-weight: 600;
    color: #667eea;
    margin-bottom: 0.25rem;
}

.empty-state {
    text-align: center;
    padding: 3rem;
    color: #999;
}