/* Base Styles */
:root {
    --sidebar-width: 300px;
    --header-height: 60px;
    --primary-color: #2c3e50;
    --secondary-color: #34495e;
    --accent-color: #f66885;
    --text-color: #ecf0f1;
    --background-color: #1a1a1a;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Rubik', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

/* Reader Container */
.reader-container {
    display: flex;
    min-height: 100vh;
    position: relative;
}

/* Sidebar Styles */
.chapter-sidebar {
    width: var(--sidebar-width);
    background-color: var(--primary-color);
    padding: 1rem;
    height: 100vh;
    position: fixed;
    left: 0;
    overflow-y: auto;
    transition: transform 0.3s ease;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--text-color);
}

.chapter-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.chapter-item {
    padding: 0.75rem;
    background-color: var(--secondary-color);
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.chapter-item:hover {
    background-color: var(--accent-color);
}

.chapter-item.active {
    background-color: var(--accent-color);
    font-weight: bold;
}

/* Main Content Area */
.reader-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 1rem;
}

.reader-header, .reader-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.nav-btn {
    padding: 0.5rem 1rem;
    background-color: var(--accent-color);
    border: none;
    border-radius: 4px;
    color: var(--text-color);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.nav-btn:hover {
    background-color: #2980b9;
}

.nav-btn:disabled {
    background-color: #95a5a6;
    cursor: not-allowed;
}

/* Pages Container */
.pages-container {
    display: flex;
    flex-direction: column;
    
    align-items: center;
    width: 100%;
    max-width: 100%;
}

.comic-page {
    width: 100%;
    max-width: 800px;
    margin: 0 auto 2rem;
    position: relative;
}

.comic-page img {
    width: 100%;
    height: auto;
    display: block;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* Mobile Chapter Selection Button */
.mobile-chapter-select {
    display: none;
    position: fixed;
    top: 5px;
    left: 1rem;
    z-index: 1000;
}

#show-chapters {
    width: 44px;
    height: 44px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--accent-color);
    border: none;
    border-radius: 50%;
    color: var(--text-color);
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    transition: all 0.2s ease;
}

#show-chapters:hover {
    background-color: #f55a78;
    transform: scale(1.05);
}

#show-chapters:active {
    transform: scale(0.98);
}

#show-chapters i {
    font-size: 1.2rem;
}

/* Mobile Styles */
@media (max-width: 768px) {
    .reader-footer {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background-color: var(--background-color);
        padding: 0.5rem;
        z-index: 999;
        display: flex; /* Ensure flex layout is maintained */
    }

    .nav-btn {
        padding: 0.8rem;
        font-size: 0.9rem;
        flex: 1;
        margin: 0 0.25rem;
        position: relative; /* Ensure buttons are clickable */
        z-index: 1000; /* Make sure buttons are above other elements */
        
    }
    .chapter-sidebar {
        transform: translateX(-100%);
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        z-index: 1001;
        background-color: var(--background-color);
        padding: 2rem 1rem;
    }

    .chapter-sidebar.active {
        transform: translateX(0);
    }

    .reader-content {
        margin-left: 0;
        padding: 0;
    }

    .mobile-chapter-select {
        display: block;
    }

    #show-chapters {
        width: 48px;
        height: 48px;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        background-color: var(--primary-color);
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    }

    .reader-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        background-color: var(--background-color);
        padding: 1rem;
        z-index: 999;
        justify-content: center;
    }

    .reader-header .nav-btn {
        display: none; /* Hide top navigation buttons on mobile */
    }

    .reader-header h1 {
        font-size: 1rem;
        margin: 0;
        padding-left: 60px; /* Space for hamburger menu */
    }

    .pages-container {
        margin-top: 60px; /* Space for fixed header */
        gap: 0;
        padding-bottom: 60px; /* Space for fixed footer */
    }

    .comic-page {
        max-width: 100%;
        margin: 0 0 1rem 0;
    }

    .comic-page img {
        border-radius: 0;
        box-shadow: none;
    }

    .reader-footer {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background-color: var(--background-color);
        padding: 0.5rem;
        z-index: 999;
    }

    .nav-btn {
        padding: 0.8rem;
        font-size: 0.9rem;
        flex: 1;
        margin: 0 0.25rem;
    }

    /* Chapter list styling for mobile */
    .chapter-list {
        gap: 1rem;
        padding: 1rem 0;
    }

    .chapter-item {
        padding: 1rem;
        font-size: 1.1rem;
    }

    .sidebar-header {
        margin-bottom: 2rem;
    }

    .sidebar-header h2 {
        font-size: 1.5rem;
    }

    /* Loading indicator adjustments for mobile */
    .loading {
        margin: 4rem auto;
    }

    /* No images message adjustments for mobile */
    .no-images-message {
        margin: 4rem 1rem;
        padding: 1rem;
    }

    /* Overlay styling */
    .sidebar-overlay {
        background-color: var(--background-color);
        opacity: 0.95;
    }
}

/* Additional mobile optimizations for smaller screens */
@media (max-width: 480px) {
    .chapter-item {
        padding: 0.8rem;
        font-size: 1rem;
    }

    .nav-btn {
        padding: 0.6rem;
        font-size: 0.8rem;
    }
}

/* Loading Indicator */
.loading {
    display: inline-block;
    width: 50px;
    height: 50px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--accent-color);
    animation: spin 1s ease-in-out infinite;
    margin: 2rem auto;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Overlay for Mobile Sidebar */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
}

.sidebar-overlay.active {
    display: block;
}

/* No Images Message */
.no-images-message {
    text-align: center;
    padding: 2rem;
    background-color: var(--secondary-color);
    border-radius: 8px;
    margin: 2rem auto;
    max-width: 600px;
    color: var(--text-color);
    font-size: 1.1rem;
    line-height: 1.5;
}
/* Add this to your reader.css file */

#sort-chapters {
    background-color: var(--accent-color);
    border: none;
    border-radius: 20px; /* Rounded corners */
    padding: 8px 12px;
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

#sort-chapters:hover {
    background-color: #f55a78; /* Slightly darker pink on hover */
    transform: translateY(-1px);
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.2);
}

#sort-chapters:active {
    transform: translateY(0);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

#sort-chapters i {
    font-size: 1rem;
    transition: transform 0.2s ease;
}

/* Rotate the icon when sort is ascending */
#sort-chapters.asc i {
    transform: rotate(180deg);
}

/* Mobile specific styling */
@media (max-width: 768px) {
    #sort-chapters {
        padding: 10px 14px;
        border-radius: 24px;
    }
    
    #sort-chapters i {
        font-size: 1.1rem;
    }
}
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

#show-chapters.pulse {
    animation: pulse 2s infinite;
}

/* Image error styling */
.image-error {
    text-align: center;
    padding: 2rem;
    background-color: var(--secondary-color);
    border-radius: 4px;
    color: var(--text-color);
    font-size: 0.9rem;
}