html,
body {
    margin: 0;
    padding: 0;
    height: 100%;
    width: 100%;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

#map {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

/* Small info / future-controls sidebar */
#sidebar {
    position: absolute;
    top: 10px;
    left: 10px;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    padding: 10px 12px;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
    max-width: 260px;
    font-size: 13px;
}

#sidebar h1 {
    font-size: 15px;
    margin: 0 0 6px 0;
}

#sidebar .hint {
    color: #555;
    font-size: 12px;
}

.layer-control {
    margin-top: 12px;
    padding-top: 8px;
    border-top: 1px solid #ddd;
}

.layer-control label {
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.layer-control input[type="checkbox"] {
    margin-right: 8px;
    cursor: pointer;
}

.layer-control span {
    font-size: 13px;
    color: #333;
}