/* Additional Modern Features Styles */

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    left: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* Reading Progress Bar */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 4px;
    background: var(--gradient-primary);
    z-index: 9999;
    transition: width 0.2s ease;
    box-shadow: 0 2px 10px rgba(127, 169, 155, 0.5);
}

/* Table of Contents */
.table-of-contents {
    background: linear-gradient(135deg, var(--color-secondary) 0%, #fff 100%);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border-right: 4px solid var(--color-primary);
    margin: var(--spacing-2xl) 0;
    box-shadow: var(--shadow-md);
}

.table-of-contents h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-xl);
}

.table-of-contents ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.table-of-contents li {
    margin-bottom: var(--spacing-sm);
}

.table-of-contents li.toc-h3 {
    padding-right: var(--spacing-lg);
}

.table-of-contents a {
    color: var(--color-text);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.table-of-contents a::before {
    content: '\f0da';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--color-primary);
}

.table-of-contents a:hover {
    background: white;
    color: var(--color-primary);
    padding-right: var(--spacing-md);
}

/* Copy Code Button */
.copy-code {
    position: absolute;
    top: 10px;
    left: 10px;
    background: rgba(255, 255, 255, 0.9);
    color: var(--color-text);
    border: none;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 14px;
    transition: all var(--transition-fast);
    z-index: 10;
}

.copy-code:hover {
    background: white;
    color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

/* Print Button */
.print-article {
    margin-left: var(--spacing-md);
}

/* Enhanced Blockquote with Icon */
.entry-content blockquote {
    position: relative;
    padding-right: 60px;
}

.entry-content blockquote::before {
    content: '\f10d';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    font-size: 40px;
    color: var(--color-primary);
    opacity: 0.2;
}

/* Highlight Box */
.highlight-box {
    background: linear-gradient(135deg, #fff3cd 0%, #fff 100%);
    border-right: 4px solid #ffc107;
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin: var(--spacing-lg) 0;
}

.info-box {
    background: linear-gradient(135deg, #d1ecf1 0%, #fff 100%);
    border-right: 4px solid #17a2b8;
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin: var(--spacing-lg) 0;
}

.warning-box {
    background: linear-gradient(135deg, #f8d7da 0%, #fff 100%);
    border-right: 4px solid #dc3545;
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin: var(--spacing-lg) 0;
}

/* Breadcrumbs */
.breadcrumbs {
    background: var(--color-bg-alt);
    padding: var(--spacing-md) 0;
    margin-bottom: var(--spacing-xl);
}

.breadcrumbs ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin: 0;
    padding: 0;
}

.breadcrumbs li {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.breadcrumbs li::after {
    content: '\f104';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--color-text-light);
    font-size: 12px;
}

.breadcrumbs li:last-child::after {
    content: none;
}

.breadcrumbs a {
    color: var(--color-text-light);
    text-decoration: none;
}

.breadcrumbs a:hover {
    color: var(--color-primary);
}

/* Newsletter Signup Box */
.newsletter-box {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    text-align: center;
    margin: var(--spacing-2xl) 0;
    box-shadow: var(--shadow-lg);
}

.newsletter-box h3 {
    color: white;
    margin-bottom: var(--spacing-md);
}

.newsletter-box p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-lg);
}

.newsletter-form {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 500px;
    margin: 0 auto;
}

.newsletter-form input[type="email"] {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-full);
    font-size: var(--font-size-base);
}

.newsletter-form button {
    padding: var(--spacing-sm) var(--spacing-xl);
    background: white;
    color: var(--color-primary);
    border: none;
    border-radius: var(--radius-full);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.newsletter-form button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Responsive */
@media (max-width: 768px) {
    .back-to-top {
        bottom: 20px;
        left: 20px;
        width: 45px;
        height: 45px;
    }

    .table-of-contents {
        padding: var(--spacing-lg);
    }

    .newsletter-form {
        flex-direction: column;
    }
}

@media print {

    .back-to-top,
    .reading-progress,
    .print-article,
    .social-share,
    .header-search,
    .menu-toggle,
    .sidebar,
    .site-footer,
    .related-posts,
    .comments-area {
        display: none !important;
    }
}