.epub-container {
    max-width: 100%;
    margin: 0 auto;
    padding: 2px;
    font-family: 'Georgia', serif;
    line-height: 1.6;
}

.epub-header {
    text-align: center;
    margin-bottom: 30px;
    padding: 2px;
    background: linear-gradient(135deg, #d5b577 0%, #ffa800 100%);
    color: white;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.epub-title {
    font-size: 2.5em;
    margin: 0 0 10px 0;
    font-weight: 300;
}

.epub-author {
    font-size: 1.2em;
    opacity: 0.9;
    margin: 0;
}

.epub-controls {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin: 20px 0;
    flex-wrap: wrap;
}

.epub-btn {
    padding: 12px 24px;
    border: none;
    border-radius: 25px;
    background: linear-gradient(135deg, #d5b577 0%, #ffa800 100%);
    color: white;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.epub-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.epub-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.epub-content {
    background: white;
    padding: 4px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    min-height: 600px;
    position: relative;
}

.epub-page {
    font-size: 18px;
    color: #333;
    text-align: justify;
    max-width: 800px;
    margin: 0 auto;
}

.epub-page h1,
.epub-page h2,
.epub-page h3 {
    color: #2c3e50;
    margin-top: 30px;
    margin-bottom: 15px;
}

.epub-page p {
    margin-bottom: 20px;
    text-indent: 2em;
}

.epub-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 30px;
    padding: 2px;
    background: #f8f9fa;
    border-radius: 10px;
}

.epub-progress {
    flex: 1;
    margin: 0 20px;
}

.epub-progress-bar {
    width: 100%;
    height: 8px;
    background: #e9ecef;
    border-radius: 4px;
    overflow: hidden;
}

.epub-progress-fill {
    /* height: 100%; */
    background: linear-gradient(90deg, #d5b577 0%, #ffa800 100%);
    transition: width 0.3s ease;
}

.epub-status {
    text-align: center;
    color: #6c757d;
    font-size: 14px;
    margin-top: 10px;
}

.epub-loading {
    text-align: center;
    padding: 60px 20px;
    color: #6c757d;
}

.epub-loading::after {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #d5b577;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: 10px;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

.epub-error {
    text-align: center;
    padding: 40px 20px;
    color: #dc3545;
    background: #f8d7da;
    border: 1px solid #f5c6cb;
    border-radius: 10px;
    margin: 20px 0;
}

/* Dark mode support */
html.dark .epub-content {
    background: #1a1a1a;
    color: #e0e0e0;
}

html.dark .epub-page {
    color: #e0e0e0;
}

html.dark .epub-page h1,
html.dark .epub-page h2,
html.dark .epub-page h3 {
    color: #ffffff;
}

html.dark .epub-navigation {
    background: #2d2d2d;
}

/* Responsive design */
@media (max-width: 768px) {
    .epub-container {
        padding: 2px;
    }

    .epub-content {
        padding: 2px;
    }

    .epub-title {
        font-size: 2em;
    }

    .epub-controls {
        flex-direction: column;
        align-items: center;
    }

    .epub-btn {
        width: 100%;
        max-width: 200px;
    }
}