body {
    padding: 0;
    margin: 0;
}
html, body, #map {
    height: 100%;
    width: 100%;
}
.nav {
    display: flex;
    justify-content: center;
    align-items: center;
}
#map {
    height: 100%;
    width: 100%;
}
.leaflet-bottom .leaflet-control {
    bottom: 0px !important;
    margin-bottom: 0px !important;
}

/* 新增的工具提示样式 */
.red-tooltip {
    color: red;
}
.blue-tooltip {
    color: blue;
}
/* Modal 样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgb(0,0,0);
    background-color: rgba(0,0,0,0.4);
}

.modal-content {
    background-color: #fefefe;
    margin: 15% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
    max-width: 300px;
    text-align: center;
}

.close-btn {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
}

.close-btn:hover,
.close-btn:focus {
    color: black;
    text-decoration: none;
    cursor: pointer;
}

#group-input {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    box-sizing: border-box;
}

#submit-btn {
    background-color: #4CAF50;
    color: white;
    padding: 10px 20px;
    margin: 8px 0;
    border: none;
    cursor: pointer;
    width: 100%;
}

#submit-btn:hover {
    background-color: #45a049;
}