body {
    margin: 0;
    font-family: Verdana, sans-serif;
    background: #f5f5f5;
}

.container {
    display: flex;
    height: 100vh;
}

/* LINKERZIJDE */

.sidebar {
    width: 360px;
    background: #ffffff;
    border-right: 1px solid #d0d0d0;
    overflow-y: auto;
    padding: 20px;
    box-sizing: border-box;
}

.sidebar h2 {
    margin-top: 0;
    margin-bottom: 20px;
    font-size: 22px;
    color: #444;
    border-bottom: 2px solid #ddd;
    padding-bottom: 10px;
}

/* LIJST */

.sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

/* HOOFDSTUK */

.chapter-title {
    margin-top: 22px;
    margin-bottom: 10px;
    padding: 10px 14px;
    background: #e9eef5;
    border-left: 5px solid #5d84b7;
    border-radius: 6px;
    font-size: 15px;
    font-weight: bold;
    color: #2d4d73;
}

/* DOCUMENT */

.document-item {
    margin-bottom: 8px;
    padding: 10px 14px;
    margin-left: 15px;
    background: #fafafa;
    border-left: 3px solid #d0d0d0;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    line-height: 1.5;
}

.document-item:hover {
    background: #eef5ff;
    border-left: 3px solid #5d84b7;
}

/* ACTIEF DOCUMENT */

.document-item.active {
    background: #dcecff;
    border-left: 4px solid #2b7bbb;
    box-shadow: 0 0 4px rgba(0,0,0,0.08);
}

/* DOCUMENT TITEL */

.document-item strong {
    font-size: 14px;
    color: #222;
}

/* SUBTEKST */

.document-item .meta {
    font-size: 12px;
    color: #777;
}

/* RECHTERZIJDE */

.viewer {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: #f0f0f0;
}

/* TOOLBAR */

.toolbar {
    height: 55px;
    background: #ffffff;
    border-bottom: 1px solid #d0d0d0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    box-sizing: border-box;
}

/* KNOPPEN */

.toolbar button {
    padding: 8px 16px;
    border: 1px solid #bdbdbd;
    background: white;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s ease;
}

.toolbar button:hover {
    background: #e7f0ff;
    border-color: #5d84b7;
}

/* TITEL */

#currentDocumentTitle {
    font-weight: bold;
    color: #333;
    font-size: 15px;
}

/* PDF VIEWER */

#pdfViewer {
    flex: 1;
    width: 100%;
    border: none;
    background: white;
}