/* Add these styles to your existing 'css/index.css' file 
  or link this file separately in your HTML head.
*/

.add-tree-card {
    background-color: var(--surface-color, #1e1e1e);
    border-radius: 8px;
    border: 2px dashed var(--border-color, #333333);
    color: var(--secondary-text, #a0a0a0);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: background-color 0.2s ease-in-out, border-color 0.2s ease-in-out, color 0.2s ease-in-out;
    min-height: 250px; /* Or match the height of your .tree-card */
}

    .add-tree-card:hover {
        background-color: #2a2a2a;
        border-color: var(--accent-color, #4CAF50);
        color: var(--primary-text, #e0e0e0);
    }

    .add-tree-card .plus-sign {
        font-size: 4rem;
        font-weight: 200;
        line-height: 1;
    }

    .add-tree-card h3 {
        margin: 0.5rem 0 0 0;
        font-weight: 400;
        text-align: center;
    }