body { margin: 0; padding: 0; }

#map { height: 100vh; }

#add-button {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    padding: 10px 20px;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 25px;
    box-shadow: 0px 2px 5px rgba(0, 0, 0, 0.3);
    cursor: pointer;
}