/* Main layout styles */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f5f5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header styles */
header {
    background-color: #ffffff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 1rem 0;
}

h1 {
    color: #333;
    margin: 0 0 1rem 0;
}

/* Controls section */
.controls {
    background-color: #ffffff;
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

/* Select dropdown styling */
select {
    width: 100%;
    max-width: 300px;
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    background-color: white;
    font-size: 1rem;
}

/* Map container */
#map {
    height: 600px;
    width: 100%;
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

/* Statistics panel */
#statistics {
    background-color: #ffffff;
    padding: 1rem;
    border-radius: 4px;
    margin-top: 1rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

/* Loading indicator */
#loader {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(255,255,255,0.9);
    padding: 1rem;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

/* Error message */
#error {
    display: none;
    background-color: #ff5252;
    color: white;
    padding: 1rem;
    border-radius: 4px;
    margin: 1rem 0;
}

/* Airport popup styling */
.airport-popup {
    padding: 0.5rem;
}

.airport-popup h3 {
    margin: 0 0 0.5rem 0;
    color: #333;
}

.airport-popup p {
    margin: 0.25rem 0;
    color: #666;
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }

    #map {
        height: 400px;
    }

    select {
        max-width: 100%;
    }
}