/* ==========================================================================
   MOE Tamil Interactive eBook - Controls & UI Styles
   ========================================================================== */

/* ==========================================================================
   Toolbar
   ========================================================================== */

.toolbar {
    position: sticky;
    top: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--toolbar-height);
    padding: 0 var(--spacing-lg);
    background: linear-gradient(135deg, rgba(26, 26, 46, 0.95), rgba(22, 33, 62, 0.95));
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: var(--z-toolbar);
    box-shadow: var(--shadow-md);
}

.toolbar-left,
.toolbar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.toolbar-center {
    display: flex;
    align-items: center;
}

.book-title {
    font-family: var(--font-tamil);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin-left: var(--spacing-md);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 300px;
}

.page-indicator {
    font-size: 0.9rem;
    color: var(--text-secondary);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

/* ==========================================================================
   Sidebar
   ========================================================================== */

.sidebar {
    position: fixed;
    top: var(--toolbar-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--toolbar-height));
    background: linear-gradient(180deg, rgba(22, 33, 62, 0.98), rgba(15, 52, 96, 0.98));
    backdrop-filter: blur(20px);
    border-right: 1px solid var(--border-color);
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    z-index: var(--z-sidebar);
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
}

.sidebar.open {
    transform: translateX(0);
}

.sidebar-header {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    position: relative;
}

.sidebar-header h2 {
    font-family: var(--font-tamil);
    font-size: 1.4rem;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-xs);
}

.sidebar-header h3 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 400;
}

#sidebar-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
}

/* ==========================================================================
   Table of Contents (Sidebar)
   ========================================================================== */

.toc {
    padding: var(--spacing-md);
}

.toc-nav-chapter {
    margin-bottom: var(--spacing-md);
}

.toc-nav-chapter-title {
    font-family: var(--font-tamil);
    font-size: 1rem;
    font-weight: 600;
    color: var(--secondary-color);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-xs);
}

.toc-nav-items {
    list-style: none;
    padding-left: var(--spacing-md);
}

.toc-nav-item {
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-left: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.toc-nav-item:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
    border-left-color: var(--secondary-color);
}

.toc-nav-item.active {
    color: var(--secondary-color);
    border-left-color: var(--secondary-color);
    background: rgba(218, 165, 32, 0.1);
}

.toc-nav-item span:last-child {
    font-size: 0.8rem;
    opacity: 0.7;
}

/* ==========================================================================
   Sidebar Sections
   ========================================================================== */

.sidebar-section {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.sidebar-section h4 {
    font-family: var(--font-tamil);
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.bookmarks-list {
    list-style: none;
}

.bookmarks-list li {
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    border-radius: var(--radius-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.bookmarks-list li:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.bookmarks-list .empty-message {
    font-style: italic;
    color: var(--text-muted);
    cursor: default;
}

.bookmarks-list .empty-message:hover {
    background: transparent;
    color: var(--text-muted);
}

.bookmark-delete {
    opacity: 0;
    padding: var(--spacing-xs);
    background: transparent;
    border: none;
    color: var(--error-color);
    cursor: pointer;
    transition: opacity var(--transition-fast);
}

.bookmarks-list li:hover .bookmark-delete {
    opacity: 1;
}

/* ==========================================================================
   View Controls
   ========================================================================== */

.view-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xl);
    padding: var(--spacing-md);
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    flex-wrap: wrap;
}

.view-modes {
    display: flex;
    gap: var(--spacing-xs);
    background: var(--bg-card);
    padding: var(--spacing-xs);
    border-radius: var(--radius-md);
}

.view-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 36px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.view-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.view-btn.active {
    background: var(--secondary-color);
    color: var(--text-dark);
}

.zoom-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--bg-card);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
}

.zoom-level {
    min-width: 50px;
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.sound-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Toggle Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.2);
    transition: var(--transition-fast);
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: var(--transition-fast);
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--accent-color);
}

input:checked + .slider:before {
    transform: translateX(20px);
}

/* ==========================================================================
   Main Content Area
   ========================================================================== */

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    margin-left: 0;
    transition: margin-left var(--transition-normal);
}

.main-content.sidebar-open {
    margin-left: var(--sidebar-width);
}

/* ==========================================================================
   Modals
   ========================================================================== */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-overlay);
    display: none; /* Default to hidden */
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    backdrop-filter: blur(8px);
    animation: fadeIn 0.2s ease;
}

.modal.open {
    display: flex; /* Show when open */
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    background: linear-gradient(145deg, var(--bg-secondary), var(--bg-tertiary));
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from { 
        opacity: 0;
        transform: translateY(20px);
    }
    to { 
        opacity: 1;
        transform: translateY(0);
    }
}

.search-modal-content {
    max-width: 600px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-family: var(--font-tamil);
    font-size: 1.3rem;
    color: var(--secondary-color);
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

/* ==========================================================================
   Search Modal Specific
   ========================================================================== */

.search-input-container {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
}

.search-input-container input {
    flex: 1;
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.search-input-container input:focus {
    outline: none;
    border-color: var(--secondary-color);
}

.search-input-container input::placeholder {
    color: var(--text-muted);
}

.search-stats {
    padding: 0 var(--spacing-lg);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.search-results {
    max-height: 300px;
    overflow-y: auto;
    padding: var(--spacing-md) var(--spacing-lg);
}

.search-result-item {
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.search-result-item:hover {
    background: rgba(218, 165, 32, 0.1);
    transform: translateX(5px);
}

.search-result-page {
    font-size: 0.8rem;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-xs);
}

.search-result-context {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.search-result-context mark {
    background: var(--secondary-color);
    color: var(--text-dark);
    padding: 0 2px;
    border-radius: 2px;
}

.word-frequency {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.word-frequency h4 {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

#frequency-results {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.frequency-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--bg-card);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
}

.frequency-count {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary-color);
}

.frequency-label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ==========================================================================
   Bookmark Modal Specific
   ========================================================================== */

.bookmark-form {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
}

.bookmark-form input {
    flex: 1;
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
}

.bookmark-form input:focus {
    outline: none;
    border-color: var(--secondary-color);
}

/* ==========================================================================
   Responsive Styles
   ========================================================================== */

@media screen and (max-width: 1024px) {
    .main-content.sidebar-open {
        margin-left: 0;
    }
    
    .sidebar.open ~ .main-content::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        z-index: calc(var(--z-sidebar) - 1);
    }
}

@media screen and (max-width: 768px) {
    .toolbar {
        padding: 0 var(--spacing-md);
    }
    
    .book-title {
        font-size: 1rem;
        max-width: 150px;
    }
    
    .page-indicator {
        display: none;
    }
    
    .toolbar-right .btn-icon:not(#btn-fullscreen) {
        display: none;
    }
    
    .view-controls {
        gap: var(--spacing-md);
        padding: var(--spacing-sm);
    }
    
    .sound-toggle span {
        display: none;
    }
    
    .modal-content {
        width: 95%;
        max-height: 90vh;
    }
    
    .search-input-container {
        flex-direction: column;
    }
}

@media screen and (max-width: 480px) {
    .toolbar-left {
        flex: 1;
    }
    
    .book-title {
        max-width: 120px;
    }
    
    .sidebar {
        width: 100%;
    }
    
    .view-modes {
        display: none;
    }
    
    .zoom-controls {
        flex: 1;
        justify-content: center;
    }
}