:root {
    --primary-color: #4a90e2;
    --secondary-color: #f5a623;
    --background-color: #f0f4f8;
    --text-color: #333;
    --card-background: #fff;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

body.dark-mode {
    --primary-color: #58a6ff;
    --secondary-color: #f7b731;
    --background-color: #1c2128;
    --text-color: #c9d1d9;
    --card-background: #2d333b;
    --shadow-color: rgba(0, 0, 0, 0.4);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    display: grid;
    place-items: center;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
    background-image: linear-gradient(45deg, var(--background-color) 25%, transparent 25%),
                      linear-gradient(-45deg, var(--background-color) 25%, transparent 25%),
                      linear-gradient(45deg, transparent 75%, var(--background-color) 75%),
                      linear-gradient(-45deg, transparent 75%, var(--background-color) 75%);
    background-size: 20px 20px;
}

main {
    text-align: center;
    padding: 2rem;
}

h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

#generator-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
    box-shadow: 0 4px 15px var(--shadow-color);
}

#generator-button:hover {
    background-color: #357ABD;
}

#generator-button:active {
    transform: scale(0.98);
}

.theme-switcher {
    position: absolute;
    top: 1rem;
    right: 1rem;
}

#theme-toggle {
    background: none;
    border: 1px solid var(--text-color);
    color: var(--text-color);
    padding: 0.5rem;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    line-height: 1;
    transition: all 0.3s ease;
}

#theme-toggle:hover {
    background-color: var(--text-color);
    color: var(--background-color);
}

destination-card {
    display: block;
    margin-top: 2rem;
    background-color: var(--card-background);
    border-radius: 12px;
    box-shadow: 0 10px 30px var(--shadow-color);
    padding: 2rem;
    max-width: 500px;
    text-align: left;
}