html,
body {
    height: 100%;
    margin: 0;
    font-family: Arial, sans-serif;
}

#app {
    display: flex;
    height: 100vh;
    width: 100%;
}

#sidebar {
    width: 320px;
    min-width: 320px;
    box-sizing: border-box;
    padding: 16px;
    border-right: 1px solid #d9d9d9;
    background: #ffffff;
}

#sidebar h1 {
    margin-top: 0;
    margin-bottom: 16px;
    font-size: 22px;
}

#sidebar label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

#vinSelect {
    width: 100%;
    padding: 10px 12px;
    font-size: 14px;
    box-sizing: border-box;
    margin-bottom: 16px;
}

#truckCount {
    font-size: 14px;
    color: #444444;
}

#map {
    flex: 1;
    height: 100%;
    width: 100%;
}

.truck-popup {
    min-width: 220px;
}

.truck-popup-row {
    margin-bottom: 8px;
}

.truck-popup-label {
    font-weight: 700;
}

.leaflet-marker-icon {
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
}

@media (max-width: 900px) {
    #app {
        flex-direction: column;
    }

    #sidebar {
        width: 100%;
        min-width: 0;
        border-right: none;
        border-bottom: 1px solid #d9d9d9;
    }

    #map {
        height: calc(100vh - 180px);
    }
}