/**
 * COMMENTS SYSTEM - STYLES
 * Version: 1.2.1 Final
 * Date: 2025-10-22
 * 
 * Production-ready CSS for Comments feature with:
 * - Glass morphism design
 * - Responsive layout (mobile-first)
 * - Dark mode support
 * - Loading skeletons with shimmer
 * - Smooth animations
 * - Accessibility (WCAG AAA)
 */

/* =====================================================
   COMMENTS SECTION CONTAINER
   ===================================================== */

.tikz-app .comments-section {
    background: var(--glass-bg-strong);
    backdrop-filter: var(--glass-blur-medium);
    padding: var(--spacing-8);
    margin-top: var(--spacing-6);
    margin-bottom: var(--spacing-8);
    border-radius: var(--radius-xl);
    box-shadow: var(--glass-shadow);
    position: relative;
    overflow: hidden;
    transition: var(--transition-normal);
}

/* Add subtle background pattern for texture - matching caption section */
.tikz-app .comments-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, 
                rgb(255 255 255 / 10%) 0%, 
                transparent 50%, 
                rgb(255 255 255 / 10%) 100%);
    border-radius: inherit;
    pointer-events: none;
}

/* Ensure all content is above the pattern */
.tikz-app .comments-section > * {
    position: relative;
    z-index: 1;
}

.tikz-app .comments-section-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tikz-app .comments-icon {
    font-size: 2rem;
}

.tikz-app .comments-count-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
    min-width: 2rem;
    height: 2rem;
    padding: 0 0.5rem;
    border-radius: 1rem;
    margin-left: 0.5rem;
}

/* =====================================================
   COMMENT FORM (CREATE NEW COMMENT)
   ===================================================== */

.tikz-app .comment-form-container {
    background: var(--glass-bg-strong);
    backdrop-filter: var(--glass-blur-medium);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--glass-shadow);
}

.tikz-app .comment-form-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.tikz-app .comment-user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary-color);
}

.tikz-app .comment-user-avatar-fallback {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, #3b82f6 0%, #9333ea 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 1.125rem;
    border: 2px solid var(--border-color);
}

.tikz-app .comment-user-name {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.tikz-app .verified-icon {
    width: 16px;
    height: 16px;
    vertical-align: middle;
    display: inline-block;
}

.tikz-app .verified-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    color: white;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: bold;
}

.tikz-app .comment-textarea {
    width: 100%;
    min-height: 100px;
    padding: 1rem;
    background: #ffffff;
    border: 2px solid #e2e8f0;
    border-radius: var(--radius-md);
    color: #1a202c;
    font-size: 0.95rem;
    line-height: 1.5;
    resize: vertical;
    transition: var(--transition-normal);
    font-family: inherit;
}

.tikz-app .comment-textarea:focus {
    outline: none;
    border-color: #1e40af;
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.tikz-app .comment-textarea::placeholder {
    color: #4a5568;
    opacity: 0.9;
}

.tikz-app .comment-form-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1rem;
    gap: 1rem;
}

/* Comment Preview */
.tikz-app .comment-preview {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #e2e8f0;
}

.tikz-app .comment-preview h4 {
    color: #718096;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.tikz-app .comment-preview-content {
    background: #f7fafc;
    padding: 1rem;
    border-radius: var(--radius-md);
    min-height: 60px;
    font-size: 0.95rem;
    line-height: 1.7;
    white-space: pre-wrap;
    color: #1a202c;
    border: 1px solid #e2e8f0;
}

.tikz-app .comment-char-count {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.tikz-app .comment-char-count span {
    font-weight: 600;
    color: var(--text-primary);
}

.tikz-app .comment-btn {
    padding: 0.625rem 1.25rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.tikz-app .comment-btn-submit {
    background: #1e40af;
    color: white;
    font-weight: 600;
}

.tikz-app .comment-btn-submit:hover:not(:disabled) {
    background: #1e3a8a;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.tikz-app .comment-btn-submit:disabled {
    cursor: not-allowed;
    background: #e2e8f0;
    color: #334155;
}

.tikz-app .comment-message {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    display: none;
}

.tikz-app .comment-message.success {
    display: block;
    background: var(--success-bg);
    color: var(--success-dark); /* Using --success-dark from master-variables.css */
    border: 1px solid var(--success-light); /* Using --success-light as border */
}

.tikz-app .comment-message.error {
    display: block;
    background: var(--danger-bg);
    color: var(--danger-dark); /* Using --danger-dark from master-variables.css */
    border: 1px solid var(--danger-border);
}

/* =====================================================
   LOGIN PROMPT (GUEST USERS)
   ===================================================== */

.tikz-app .comment-login-prompt {
    background: var(--glass-bg-strong); /* Using --glass-bg-strong from master-variables.css */
    backdrop-filter: blur(10px);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: 2rem;
    text-align: center;
    margin-bottom: 2rem;
}

.tikz-app .comment-login-prompt p {
    font-size: 1rem;
    color: var(--text-primary);
    margin: 0;
}

.tikz-app .lock-icon {
    font-size: 1.5rem;
    vertical-align: middle;
    margin-right: 0.5rem;
}

.tikz-app .login-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-normal);
}

.tikz-app .login-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* =====================================================
   LOADING SKELETON
   ===================================================== */

.tikz-app .comments-loading {
    margin-bottom: 2rem;
}

.tikz-app .comment-skeleton {
    background: var(--glass-bg-strong); /* Using --glass-bg-strong from master-variables.css */
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin-bottom: 1rem;
    display: flex;
    gap: 1rem;
}

.tikz-app .skeleton-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(
        90deg,
        rgba(200, 200, 200, 0.2) 25%,
        rgba(200, 200, 200, 0.4) 50%,
        rgba(200, 200, 200, 0.2) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    flex-shrink: 0;
}

.tikz-app .skeleton-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.tikz-app .skeleton-line {
    height: 12px;
    border-radius: 6px;
    background: linear-gradient(
        90deg,
        rgba(200, 200, 200, 0.2) 25%,
        rgba(200, 200, 200, 0.4) 50%,
        rgba(200, 200, 200, 0.2) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

.tikz-app .skeleton-line-short {
    width: 30%;
}

.tikz-app .skeleton-line-medium {
    width: 60%;
}

.tikz-app .skeleton-line-long {
    width: 90%;
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* =====================================================
   EMPTY STATE
   ===================================================== */

.tikz-app .comments-empty {
    background: var(--glass-bg-strong); /* Using --glass-bg-strong from master-variables.css */
    backdrop-filter: blur(10px);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: 3rem 2rem;
    text-align: center;
    margin-bottom: 2rem;
}

.tikz-app .empty-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.6;
}

.tikz-app .empty-text {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.tikz-app .empty-subtext {
    font-size: 0.95rem;
    color: #4a5568;
    margin: 0;
}

/* =====================================================
   COMMENTS CONTAINER
   ===================================================== */

.tikz-app .comments-container {
    margin-bottom: 2rem;
}

/* =====================================================
   INDIVIDUAL COMMENT
   ===================================================== */

.tikz-app .comment {
    background: var(--glass-bg-strong); /* Using --glass-bg-strong from master-variables.css */
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin-bottom: 1rem;
    transition: var(--transition-normal);
}

.tikz-app .comment:hover {
    box-shadow: var(--shadow-md);
}

.tikz-app .comment-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.tikz-app .comment-avatar-wrapper {
    position: relative;
    flex-shrink: 0;
}

.tikz-app .comment-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border-color);
}

.tikz-app .comment-meta {
    flex: 1;
    margin-left: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.tikz-app .comment-author-wrapper {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    flex-wrap: wrap;
}

.tikz-app .comment-author {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 0.95rem;
}

.tikz-app .comment-timestamp {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.tikz-app .comment-actions-menu {
    position: relative;
}

.tikz-app .comment-menu-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
    line-height: 1;
}

.tikz-app .comment-menu-btn:hover {
    background: var(--bg-tertiary); /* #f8f9fa from master-variables.css */
    color: var(--text-primary);
}

.tikz-app .comment-dropdown {
    position: absolute;
    right: 0;
    top: 100%;
    margin-top: 0.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 150px;
    z-index: 100;
}

.tikz-app .dropdown-item {
    width: 100%;
    padding: 0.75rem 1rem;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.9rem;
    text-align: left;
    cursor: pointer;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tikz-app .dropdown-item:hover {
    background: var(--bg-tertiary); /* #f8f9fa from master-variables.css */
}

.tikz-app .dropdown-item:first-child {
    border-top-left-radius: var(--radius-md);
    border-top-right-radius: var(--radius-md);
}

.tikz-app .dropdown-item:last-child {
    border-bottom-left-radius: var(--radius-md);
    border-bottom-right-radius: var(--radius-md);
}

/* =====================================================
   COMMENT BODY
   ===================================================== */

.tikz-app .comment-body {
    margin-bottom: 1rem;
}

.tikz-app .comment-text {
    color: #1a202c;
    font-size: 0.95rem;
    line-height: 1.6;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.tikz-app .comment-edit-form {
    margin-top: 1rem;
}

.tikz-app .comment-edit-textarea {
    width: 100%;
    min-height: 80px;
    padding: 0.75rem;
    background: #ffffff;
    border: 2px solid #e2e8f0;
    border-radius: var(--radius-md);
    color: #1a202c;
    font-size: 0.95rem;
    line-height: 1.5;
    resize: vertical;
    transition: var(--transition-normal);
    font-family: inherit;
}

.tikz-app .comment-edit-textarea:focus {
    outline: none;
    border-color: #1e40af;
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.tikz-app .comment-edit-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 0.75rem;
}

.tikz-app .comment-btn-cancel {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.tikz-app .comment-btn-cancel:hover {
    background: var(--bg-tertiary); /* #f8f9fa from master-variables.css */
}

.tikz-app .comment-btn-save {
    background: var(--primary-color);
    color: white;
}

.tikz-app .comment-btn-save:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* =====================================================
   COMMENT FOOTER
   ===================================================== */

.tikz-app .comment-footer {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.tikz-app .comment-like-btn,
.tikz-app .comment-reply-btn {
    background: transparent;
    border: 1px solid #888; /* Gray-600 for WCAG 2.1 UI component contrast (3.40:1) */
    color: #1a202c; /* Very dark gray for maximum visibility (16.32:1 AAA) */
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
}

.tikz-app .comment-like-btn:hover,
.tikz-app .comment-reply-btn:hover {
    background: var(--bg-tertiary); /* #f8f9fa from master-variables.css */
    border-color: var(--primary-color); /* #1976d2 from master-variables.css */
    color: var(--primary-dark); /* #0d47a1 - Dark blue for visibility (8.19:1 AAA) */
    transform: translateY(-1px);
}

.tikz-app .comment-like-btn.liked {
    background: #1e40af; /* Blue-800 for WCAG AAA (8.72:1) */
    color: white;
    border-color: #1e40af;
}

.tikz-app .comment-like-btn.liked:hover {
    background: #1e3a8a; /* Blue-900 for even better contrast (10.36:1 AAA) */
    border-color: #1e3a8a;
}

.tikz-app .like-icon,
.tikz-app .reply-icon {
    font-size: 1rem;
}

.tikz-app .like-count {
    font-weight: 600;
}

.tikz-app .comment-edited-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* =====================================================
   REPLY FORM
   ===================================================== */

.tikz-app .comment-reply-form {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.tikz-app .reply-textarea {
    width: 100%;
    min-height: 60px;
    padding: 0.75rem;
    background: #ffffff;
    border: 2px solid #e2e8f0;
    border-radius: var(--radius-md);
    color: #1a202c;
    font-size: 0.9rem;
    line-height: 1.5;
    resize: vertical;
    transition: var(--transition-normal);
    font-family: inherit;
}

.tikz-app .reply-textarea:focus {
    outline: none;
    border-color: #1e40af;
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.tikz-app .reply-form-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 0.75rem;
}

/* =====================================================
   REPLIES CONTAINER (NESTED COMMENTS)
   ===================================================== */

.tikz-app .comment-replies {
    margin-top: 1rem;
    margin-left: 2.5rem;
    padding-left: 1rem;
    border-left: 3px solid var(--border-color);
}

.tikz-app .comment-replies .comment {
    background: var(--glass-bg-strong); /* Glass morphism like parent comments */
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin-bottom: 1rem;
    transition: var(--transition-normal);
}

/* =====================================================
   PAGINATION
   ===================================================== */

.tikz-app .comments-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.tikz-app .pagination-btn {
    padding: 0.625rem 1.25rem;
    background: var(--glass-bg-strong); /* Using --glass-bg-strong from master-variables.css */
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-normal);
}

.tikz-app .pagination-btn:hover:not(:disabled) {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.tikz-app .pagination-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.tikz-app .page-info {
    font-size: 0.9rem;
    color: var(--text-primary);
    font-weight: 500;
}

.tikz-app .page-info span {
    font-weight: 700;
    color: var(--primary-color);
}

.tikz-app .load-more-btn {
    width: 100%;
    padding: 0.875rem;
    background: var(--glass-bg-strong); /* Using --glass-bg-strong from master-variables.css */
    backdrop-filter: blur(10px);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-normal);
}

.tikz-app .load-more-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* =====================================================
   RESPONSIVE DESIGN
   ===================================================== */

@media (max-width: 768px) {
    .tikz-app .comments-section {
        padding: 1.5rem;
    }
    
    .tikz-app .comments-section-title {
        font-size: 1.5rem;
    }
    
    .tikz-app .comment-form-container,
    .tikz-app .comment {
        padding: 1rem;
    }
    
    .tikz-app .comment-user-avatar,
    .tikz-app .comment-user-avatar-fallback,
    .tikz-app .comment-avatar {
        width: 36px;
        height: 36px;
        font-size: 1rem; /* Smaller text for fallback on mobile */
    }
    
    .tikz-app .comment-textarea {
        min-height: 80px;
        font-size: 0.9rem;
    }
    
    .tikz-app .comment-form-footer {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .tikz-app .comment-btn {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }
    
    .tikz-app .comment-replies {
        margin-left: 1rem;
        padding-left: 0.75rem;
    }
    
    .tikz-app .comments-pagination {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .tikz-app .pagination-btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .tikz-app .comments-section {
        padding: 1rem;
        margin-top: 1rem;
    }
    
    .tikz-app .comments-section-title {
        font-size: 1.25rem;
    }
    
    .tikz-app .comment-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }
    
    .tikz-app .comment-footer {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .tikz-app .comment-like-btn,
    .tikz-app .comment-reply-btn {
        width: 100%;
        justify-content: center;
    }
}

/* =====================================================
   DARK MODE SUPPORT
   Override for accessibility when master-variables has dark mode
   ===================================================== */

@media (prefers-color-scheme: dark) {
    /* Fix hover state contrast in dark mode */
    .tikz-app .comment-like-btn:hover,
    .tikz-app .comment-reply-btn:hover {
        /* In dark mode, --bg-tertiary becomes #3a3a3a (dark)
           So we need lighter text for contrast */
        color: #a8d8ff; /* Ultra light blue for 7.55:1 contrast on #3a3a3a ✅ AAA */
    }
    
    /* Keep liked button state clear in dark mode */
    .tikz-app .comment-like-btn.liked {
        /* Already has explicit colors, no change needed */
    }
}

/* =====================================================
   ACCESSIBILITY ENHANCEMENTS
   ===================================================== */

.tikz-app .comment-btn:focus,
.tikz-app .pagination-btn:focus,
.tikz-app .load-more-btn:focus,
.tikz-app .comment-like-btn:focus,
.tikz-app .comment-reply-btn:focus,
.tikz-app .comment-menu-btn:focus {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

.tikz-app .comment-textarea:focus,
.tikz-app .comment-edit-textarea:focus,
.tikz-app .reply-textarea:focus {
    box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.2);
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    .tikz-app .comment,
    .tikz-app .comment-btn,
    .tikz-app .pagination-btn,
    .tikz-app .load-more-btn,
    .tikz-app .comment-like-btn,
    .tikz-app .comment-reply-btn {
        transition: none;
    }
    
    .tikz-app .skeleton-avatar,
    .tikz-app .skeleton-line {
        animation: none;
    }
}

/* =====================================================
   TIKZ CODE BLOCKS (Synchronized with file_card.css)
   ===================================================== */

.tikz-app .tikz-code-block {
    background-color: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: var(--radius-md);
    margin: var(--spacing-4) 0;
    overflow: hidden;
    transition: var(--transition-normal);
}

.tikz-app .tikz-code-block:hover {
    border-color: var(--primary-color);
}

/* Code Header - synchronized with file_card.css */
.tikz-app .code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 15px;
    background: #f8f9fa;
    border-bottom: 1px solid #e9ecef;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.tikz-app .code-label {
    font-weight: var(--font-weight-bold);
    color: #333;
    font-size: 0.875rem;
}

/* Copy Button - synchronized with index.css main action buttons */
.tikz-app .code-copy-btn {
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: var(--text-white);
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 14px;
    font-weight: var(--font-weight-semibold);
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    box-shadow: var(--shadow-sm);
}

.tikz-app .code-copy-btn:hover {
    background: linear-gradient(90deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    color: var(--text-white);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px) scale(1.02);
    outline: none;
    text-decoration: none;
}

.tikz-app .code-copy-btn:active {
    transform: translateY(0) scale(1);
}

.tikz-app .copy-icon {
    font-size: 0.875rem;
}

/* Code Content */
.tikz-app .tikz-code {
    margin: 0;
    padding: 15px;
    background-color: #f8f9fa;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    overflow-x: auto;
    font-family: var(--font-family-mono);
    font-size: 12px;
    line-height: 1.6;
    color: #333;
    max-height: 400px;
}

.tikz-app .tikz-code code {
    font-family: inherit;
    color: inherit;
    background: none;
    padding: 0;
    display: block;
    white-space: pre;
    word-wrap: normal;
}

/* Scrollbar styling - synchronized with file_card.css */
.tikz-app .tikz-code::-webkit-scrollbar {
    height: 8px;
    width: 8px;
}

.tikz-app .tikz-code::-webkit-scrollbar-track {
    background: #e9ecef;
    border-radius: var(--radius-sm);
}

.tikz-app .tikz-code::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 10px;
}

.tikz-app .tikz-code::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* Mobile responsive */
@media (max-width: 768px) {
    .tikz-app .tikz-code {
        font-size: 11px;
        padding: 12px;
    }
    
    .tikz-app .code-header {
        padding: 8px 12px;
    }
    
    .tikz-app .code-label {
        font-size: 0.75rem;
    }
    
    .tikz-app .code-copy-btn {
        padding: 6px 12px;
        font-size: 12px;
    }
}