body {
    margin: 0;
    font-family: Arial, "Microsoft JhengHei", sans-serif;
}

h1 {
    margin: 0;
    padding: 15px;
    font-size: 24px;
}

#map {
    width: 100%;
    height: calc(100vh - 70px);
}
#locate-btn {
    position: fixed;
    right: 20px;
    bottom: 40px;

    width: 50px;
    height: 50px;

    border: none;
    border-radius: 50%;

    background: white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);

    font-size: 24px;
    cursor: pointer;

    z-index: 1000;
}

#locate-btn:hover {
    background: #f2f2f2;
}