body {
    font-family: 'Roboto', sans-serif;
    background-color: #f0f4f7;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 1em;
    box-sizing: border-box;
}

#tour-container {
    background-color: #ffffff;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    width: 90%;
    max-width: 800px;
    padding: 2em;
    text-align: center;
    border: 1px solid #e0e0e0;
}

h1 {
    font-family: 'Merriweather', serif;
    color: #012169; /* A classic dark blue */
    margin-bottom: 1em;
    font-size: 2.5em;
}

#landmark-display {
    margin-bottom: 2em;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

#landmark-display.visible {
    opacity: 1;
    transform: translateY(0);
}

.image-container {
    width: 100%;
    margin-bottom: 1.5em;
}

#landmark-image {
    width: 100%;
    height: 450px;
    object-fit: cover;
    border-radius: 10px;
    border: 5px solid #e0e0e0;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

#landmark-info h2 {
    font-family: 'Merriweather', serif;
    color: #D42E12; /* A shade similar to London buses */
    margin-bottom: 0.5em;
    font-size: 2em;
}

#landmark-info p {
    line-height: 1.7;
    text-align: left;
    font-size: 1.1em;
    color: #444;
}

#navigation button {
    background-color: #012169;
    color: white;
    border: none;
    padding: 12px 25px;
    font-size: 1.1em;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    margin: 0 10px;
    transition: background-color 0.3s ease, transform 0.2s ease;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

#navigation button:hover {
    background-color: #0033A0;
    transform: translateY(-2px);
}

#navigation button:active {
    transform: translateY(0);
}

@media (max-width: 600px) {
    h1 {
        font-size: 2em;
    }
    #landmark-image {
        height: 300px;
    }
    #landmark-info h2 {
        font-size: 1.5em;
    }
    #landmark-info p {
        font-size: 1em;
    }
    #navigation button {
        padding: 10px 15px;
        font-size: 1em;
    }
}