:root {
    --background-color: #f4f4f4;
    --text-color: #333;
    --header-bg: #333;
    --header-color: white;
    --section-bg: white;
    --card-bg: white;
    --card-border: #ccc;
    --button-bg: #333;
    --button-color: white;
}

body.dark-mode {
    --background-color: #333;
    --text-color: #f4f4f4;
    --header-bg: #222;
    --header-color: white;
    --section-bg: #444;
    --card-bg: #555;
    --card-border: #777;
    --button-bg: #555;
    --button-color: white;
}

body {
    font-family: sans-serif;
    margin: 0;
    background-color: var(--background-color);
    color: var(--text-color);
}

header {
    background-color: var(--header-bg);
    color: var(--header-color);
    padding: 1rem;
    text-align: center;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#theme-toggle {
    background-color: var(--button-bg);
    color: var(--button-color);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
}

main {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    padding: 1rem;
}

section {
    background-color: var(--section-bg);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    margin: 1rem;
    padding: 1rem;
    width: 30%;
    min-width: 300px;
}

#region-selection select {
    width: 100%;
    padding: 0.5rem;
    border-radius: 4px;
    border: 1px solid #ccc;
}

#recommendations-container, #itinerary-container {
    margin-top: 1rem;
}

.recommendation-card {
    border: 1px solid var(--card-border);
    background-color: var(--card-bg);
    border-radius: 4px;
    padding: 1rem;
    margin-bottom: 1rem;
}

.recommendation-card h3 {
    margin-top: 0;
}

.recommendation-card button {
    background-color: var(--button-bg);
    color: var(--button-color);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
}