/* Store Phase Styles */
.store-content {
    max-width: 800px;
    margin: 0 auto;
}

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

.upgrade-item {
    background: #f8f9fa;
    border: 3px solid #333;
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
    box-shadow: 2px 2px 6px rgba(0,0,0,0.2);
    transition: transform 0.2s;
}

.upgrade-item:hover {
    transform: translateY(-2px);
}

.upgrade-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.upgrade-info h3 {
    color: #333;
    margin: 0 0 0.5rem 0;
    font-size: 1.2rem;
}

.upgrade-info p {
    color: #666;
    margin: 0 0 1rem 0;
    font-size: 0.9rem;
}

.upgrade-stats {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
    font-size: 0.85rem;
    color: #333;
}

.upgrade-btn {
    background: #28a745;
    color: white;
    border: 2px solid #1e7e34;
    padding: 0.75rem 1rem;
    border-radius: 4px;
    font-family: inherit;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
    width: 100%;
}

.upgrade-btn:hover {
    background: #218838;
    transform: translateY(-1px);
}

.upgrade-btn:disabled {
    background: #6c757d;
    border-color: #545b62;
    cursor: not-allowed;
    transform: none;
}

.store-actions {
    text-align: center;
    margin-top: 2rem;
}

.continue-btn {
    background: #007bff;
    color: white;
    border: 2px solid #0056b3;
    padding: 1rem 2rem;
    border-radius: 4px;
    font-family: inherit;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1.1rem;
}

.continue-btn:hover {
    background: #0056b3;
    transform: translateY(-2px);
}