/* DASAR HALAMAN */
body { 
    background: #e9ecef; 
    font-family: 'Georgia', serif; 
    color: #333; 
    margin: 0; 
    padding: 0; 
}

/* NAVBAR ATAS (no-print agar tidak ikut ke PDF) */
.top-nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: #2c3e50;
    padding: 15px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    font-family: 'Segoe UI', sans-serif;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    z-index: 1000;
    color: white;
}

.top-nav label { 
    font-weight: bold; 
    font-size: 0.9em; 
}

.top-nav select { 
    padding: 8px; 
    border-radius: 4px; 
    border: none; 
    width: 250px; 
    background: #ecf0f1;
    color: #2c3e50;
}

/* TOMBOL NAVBAR */
.nav-btn {
    padding: 8px 18px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    font-size: 0.85em;
    transition: 0.3s;
    color: white;
    background: #34495e;
}

.btn-editor { background: #2ecc71; }
.btn-editor:hover { background: #27ae60; }

.btn-pdf { background: #34495e; border: 1px solid #7f8c8d; }
.btn-pdf:hover { background: #465c71; }

.btn-word { background: #34495e; border: 1px solid #7f8c8d; }

/* AREA BUKU (Kertas Putih) */
.main-container {
    padding-top: 40px; /* Jarak agar tidak tertutup navbar */
    display: flex;
    justify-content: center;
}

.book { 
    max-width: 800px; 
    margin: 100px auto 60px auto; 
    background: #fff; 
    padding: 80px 100px; 
    box-shadow: 0 5px 20px rgba(0,0,0,0.08); 
    line-height: 1.8; 
    min-height: 600px;
}

/* STYLING KONTEN BUKU */
h1.main-title { 
    text-align: center; 
    text-transform: uppercase; 
    margin-top: 40px; 
    margin-bottom: 10px; 
    letter-spacing: 2px; 
}

p.subtitle { 
    text-align: center; 
    font-style: italic; 
    color: #666; 
    margin-bottom: 80px; 
    max-width: 650px; 
    margin-left: auto; 
    margin-right: auto; 
}

h2.chapter-title { 
    text-align: center; 
    margin-top: 50px; 
    border-bottom: 1px solid #eaeaea; 
    padding-bottom: 15px; 
    margin-bottom: 30px; 
    color: #111; 
}

#placeholder-text {
    margin: auto;
    text-align: center;
    color: #7f8c8d;
    font-size: 1.2em;
    font-weight: bold;
}

/* PEMISAH HALAMAN VISUAL (Garis Putus-putus di Web) */
.page-break {
    display: block;
    margin: 80px 0;
    border-bottom: 2px dashed #bdc3c7;
    position: relative;
    page-break-before: always;
    break-before: page;
}

.page-break::after {
    content: "PAGE BREAK (NEW PAGE)";
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: #fff;
    padding: 0 15px;
    color: #95a5a6;
    font-size: 0.8em;
    font-family: sans-serif;
    letter-spacing: 2px;
    font-weight: bold;
}

.cover-image {
    max-width: 100%;
    height: auto;
    margin-bottom: 30px;
    border-radius: 5px;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

/* SETTING KHUSUS PRINT PDF */
@media print { 
    .no-print { display: none !important; } 
    body { background: #fff; }
    .book { margin: 0; box-shadow: none; width: 100%; max-width: 100%; padding: 0; } 
    
    .page-break { 
        margin: 0 !important; 
        border: none !important; 
        page-break-before: always !important; 
        break-before: page !important;
    }
    .page-break::after { display: none !important; }
}