body {
    font-family: sans-serif;
    background-color: #f0f0f0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    text-align: center;
    position: relative;
}

h1 {
    color: #333;
}

button {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    background-color: #007bff;
    color: white;
    cursor: pointer;
    margin-top: 10px;
}

button:hover {
    background-color: #0056b3;
}

#fortune-result {
    margin-top: 1.5rem;
    font-size: 1.2rem;
    color: #555;
}

#birthdate {
    margin-top: 1rem;
    padding: 0.5rem;
    border-radius: 4px;
    border: 1px solid #ccc;
}

#dark-mode-toggle {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    margin: 0;
}

/* Dark Mode */
body.dark-mode {
    background-color: #121212;
    color: #e0e0e0;
}

body.dark-mode .container {
    background-color: #1e1e1e;
    box-shadow: 0 4px 8px rgba(255, 255, 255, 0.1);
}

body.dark-mode h1 {
    color: #e0e0e0;
}

body.dark-mode #fortune-result {
    color: #bbb;
}

body.dark-mode #birthdate {
    background-color: #333;
    color: #e0e0e0;
    border-color: #555;
}