body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', system-ui, sans-serif;
    display: flex;
    background-color: #f8f9fa;
}

#narrative {
    width: 38%;
    min-width: 350px;
    background: #f8f9fa;
}

#map {
    width: 60%;
    height: 100vh;
    position: sticky;
    top: 0;
}

.intro {
    margin-bottom: 100px;
}

.intro h1 {
    margin-top: 0;
    font-size: 2.4rem;
}

.intro p {
    font-size: 1.1rem;
    color: #666;
}

.chapter {
    margin-bottom: 40vh;
    padding: 25px;
    background: #ffffff;
    border-radius: 12px;
    border-left: 5px solid #2c3e50;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);

    opacity: 0.35;
    transition: all 0.5s ease;
}

/* Slick transition when scrolling onto a chapter */
.chapter.active {
    opacity: 1;
    transform: translateX(5px);
}

.chapter h2 {
    margin-top: 0;
    color: #1a252f;
}

.chapter p {
    color: #555;
    line-height: 1.6;
}

.chapter img, .chapter video {
    width: 100%;
    border-radius: 6px;
    margin-top: 15px;
}

.chapter audio {
    width: 100%;
    margin-top: 15px;
}

.source-credit {
    font-size: 0.85rem;
    color: #555;
    margin-top: 15px;
    border-top: 1px dashed #ddd;
    padding-top: 10px;
}

.source-credit a {
    color: #3498db;
    text-decoration: none;
}

.source-credit a:hover {
    text-decoration: underline;
}