html, body {
    margin: 0;
    padding: 0;
      height: 100%;
    width: 100%;
    box-sizing: border-box;
    overflow: hidden;
    position: fixed;
}

*, *::before,
 *::after {
    box-sizing: inherit;
}

#HomePage {
    position: absolute;
    bottom: 10px;
    right: 50px;
    z-index: 100;
    background-color: rgba(30, 30, 30, 0.8);
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-weight: bold;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    transition: background-color 0.3s ease;
    font-size: 14px;
}

#HomePage:hover {
    background-color: rgba(70, 70, 70, 0.95);
}

#header {
    position: absolute;
    top: 10px;
    left: 20px;
    right: 30px;
    z-index: 100;
    color: white;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    text-shadow: 2px 2px 6px rgba(0,0,0,0.9);
    pointer-events: none;
}

#header h1 {
    margin: 0;
    font-size: 28px;
    letter-spacing: 1px;
    white-space: normal;
    overflow-wrap: break-word;
}

#header p {
    margin: 5px 0 0 0;
    font-size: 16px;
    color: #e0e0e0;
}

h2 {
    margin-top: 0;
    margin-bottom: 12px;
    font-size: 16px;
    border-bottom: 1px solid #555;
    padding-bottom: 5px;
}

#vrstvyMenu {
position: absolute;
top: 100px;
left: 20px;
z-index: 10;
background: rgba(30, 30, 30, 0.8);
color: white; 
padding: 15px;
border-radius: 12px;
font-family: 'Segoe UI', Tahoma, Verdana, sans-serif;
box-shadow: 0 8px 16px rgba(0,0,0,0.3);
transition: background-color 0.3s ease;
}

#vrstvyMenu h2 {
    font-size: 22px;
    margin-top: 0;
    margin-bottom: 10px;
    border-bottom: 1px solid #555;
    padding-bottom: 10px;
}
.tlacitko {
    margin-bottom: 12px;
    display: flex;
    align-items: center;
}
.tlacitko input[type="checkbox"] {
    margin-right: 8px;
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: #0d6efd;
}

.tlacitko label {
    font-size: 18px;
    cursor: pointer;
}

#cesiumContainer {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
}

@media screen and (max-width: 920px) {
    
    #header h1 {
        font-size: 1.1rem;
    }
    #header p {
        font-size: 0.8rem;
    }

    #homepage {
        padding: 8px 16px;
        font-size: 12px;
    }

    #vrstvyMenu {
        top: 100px; 
        padding: 10px; 
        max-width: 180px; 
    }
    
    
    #vrstvyMenu h2 {
        font-size: 16px;
        margin-bottom: 8px;
        padding-bottom: 5px;
    }

    
    .tlacitko {
        margin-bottom: 6px; 
    }

    .tlacitko label {
        font-size: 14px; 
    }

    .tlacitko input[type="checkbox"] {
        width: 14px; 
        height: 14px;
    }
    
    #header {
        width: 90%;
    }
}