body {
    font-family: -apple-system,system-ui,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif ;
    background-color: #ccd5ae;
    color: #333;
    margin: 0;
    padding: 20px;
    text-align: center;
}

.container {
    max-width: 800px;
    margin: auto;
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* Tiêu đề */
h1 {
    color: #87986a;
}

/* Khu vực kéo thả */
#dropZone {
    border: 2px dashed #87986a;
    padding: 30px;
    margin: 20px 0;
    border-radius: 10px;
    background-color: #fefae0;
    cursor: pointer;
    transition: background 0.3s;
}

#dropZone:hover {
    background-color: #faedcd;
}

#dropZone p {
    margin: 0;
    color: #87986a;
    font-weight: bold;
}

/* Nút upload */
#fileInput {
    display: none;
}

.label-upload {
    background-color: #87986a;
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    display: inline-block;
    margin-top: 10px;
    font-size: 16px;
}

.label-upload:hover {
    background-color: #d08c60;
}

/* Metadata */
#metadata {
    display: none; /* Ẩn metadata khi chưa có file */
    text-align: left;
    margin-top: 20px;
    padding: 15px;
    border-radius: 8px;
    background: #fff5fa;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.metadata-item {
    margin: 8px 0;
    padding: 8px;
    border-bottom: 1px solid #ff99c8;
}

#review {
    display: none;
}

/* Nội dung EPUB */
#epubPreview {
    background: #fff;
    padding: 10px;
    border-radius: 5px;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.1);
    min-height: 300px;
    overflow-y: auto;
    text-align: left;
}

.cover {
    max-width: 400px;
    display: block;
    margin: 10px auto;
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}