:root {
    --bg-color: #f4f4f4;
    --text-color: #333;
    --header-bg: #333;
    --header-text: #fff;
    --card-bg: #fff;
    --footer-bg: #333;
    --footer-text: #fff;
}

body.dark-mode {
    --bg-color: #1a1a1a;
    --text-color: #f4f4f4;
    --header-bg: #000;
    --header-text: #fff;
    --card-bg: #2d2d2d;
    --footer-bg: #000;
    --footer-text: #fff;
}

body {
    font-family: sans-serif;
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
}

header {
    background-color: var(--header-bg);
    color: var(--header-text);
    padding: 1rem;
    text-align: center;
    position: relative;
}

#theme-toggle {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem 1rem;
    cursor: pointer;
    background: #fff;
    color: #333;
    border: none;
    border-radius: 4px;
}

body.dark-mode #theme-toggle {
    background: #333;
    color: #fff;
}

main {
    padding: 1rem;
}

#preferences {
    background-color: var(--card-bg);
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

#recommendations {
    margin-top: 1rem;
}

.destination {
    background-color: var(--card-bg);
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

footer {
    text-align: center;
    padding: 1rem;
    background-color: var(--footer-bg);
    color: var(--footer-text);
    position: relative;
    margin-top: 2rem;
}