/* ============================================
   NEW FEATURES STYLES
   - Search Modal
   - Newsletter
   - Table of Contents
   - Related Posts
   - Ko-fi Widget
   - Highlight & Share
   - Webmentions
   - Parallax Hero
   - Random Post Button
   - Series Navigation
   ============================================ */

/* ========================================
   SEARCH MODAL
   ======================================== */

.search-modal {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 10vh;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
}

.search-modal.active {
    opacity: 1;
    visibility: visible;
}

.search-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.search-container {
    position: relative;
    width: 100%;
    max-width: 600px;
    margin: 0 1rem;
    background: var(--color-background);
    border-radius: 16px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    overflow: hidden;
    transform: translateY(-20px);
    transition: transform 0.3s ease;
}

.search-modal.active .search-container {
    transform: translateY(0);
}

.search-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.search-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.125rem;
    font-weight: 600;
    margin: 0;
}

.search-close {
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    color: var(--color-gray-medium);
    transition: color 0.2s;
}

.search-close:hover {
    color: var(--color-foreground);
}

.search-input-wrapper {
    position: relative;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.search-input-icon {
    position: absolute;
    left: 2rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-gray-medium);
}

.search-input {
    width: 100%;
    padding: 0.75rem 3rem;
    font-size: 1rem;
    border: none;
    background: transparent;
    outline: none;
    font-family: var(--font-sans);
}

.search-kbd {
    position: absolute;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-family: monospace;
    background: var(--color-border);
    border-radius: 4px;
    color: var(--color-gray-medium);
}

.search-results {
    max-height: 50vh;
    overflow-y: auto;
    padding: 1rem 1.5rem;
}

.search-hint,
.search-no-results {
    text-align: center;
    color: var(--color-gray-medium);
    padding: 2rem 0;
}

.search-results-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.search-result-item {
    margin-bottom: 0.5rem;
}

.search-result-link {
    display: block;
    padding: 1rem;
    border-radius: 8px;
    text-decoration: none;
    color: var(--color-foreground);
    transition: background 0.2s;
}

.search-result-link:hover {
    background: var(--color-border);
}

.search-result-category {
    display: inline-block;
    font-size: 0.625rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-color);
    margin-bottom: 0.25rem;
}

.search-result-title {
    display: block;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.search-result-desc {
    display: block;
    font-size: 0.875rem;
    color: var(--color-gray-medium);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.search-results mark {
    background: rgba(255, 200, 0, 0.3);
    color: inherit;
    padding: 0 2px;
    border-radius: 2px;
}

.search-more {
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-gray-medium);
    padding-top: 1rem;
}

/* Search Button in Header */
.search-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--color-gray-medium);
    transition: all 0.2s;
}

.search-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.search-btn kbd {
    font-size: 0.625rem;
    padding: 0.125rem 0.375rem;
    background: var(--color-border);
    border-radius: 4px;
}

/* ========================================
   NEWSLETTER SECTION
   ======================================== */

.newsletter-section {
    background: linear-gradient(135deg, var(--color-yellow) 0%, #f5e6d3 100%);
    padding: 4rem 2rem;
    margin: 4rem 0;
    border-radius: 16px;
}

.newsletter-content {
    max-width: 500px;
    margin: 0 auto;
    text-align: center;
}

.newsletter-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: white;
    border-radius: 50%;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.newsletter-title {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    margin: 0 0 0.75rem;
}

.newsletter-desc {
    color: var(--color-gray-dark);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.newsletter-input-group {
    display: flex;
    gap: 0.5rem;
}

.newsletter-input {
    flex: 1;
    padding: 0.875rem 1.25rem;
    font-size: 1rem;
    border: 2px solid transparent;
    border-radius: 8px;
    background: white;
    outline: none;
    transition: border-color 0.2s;
}

.newsletter-input:focus {
    border-color: var(--accent-color);
}

.newsletter-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: white;
    background: var(--color-foreground);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.newsletter-privacy {
    font-size: 0.75rem;
    color: var(--color-gray-medium);
    margin: 0;
}

@media (max-width: 600px) {
    .newsletter-input-group {
        flex-direction: column;
    }
    
    .newsletter-btn {
        justify-content: center;
    }
}

/* ========================================
   TABLE OF CONTENTS (Left Sidebar)
   ======================================== */

.toc-sidebar {
    position: sticky;
    top: 8rem;
    max-height: calc(100vh - 10rem);
    overflow-y: auto;
    padding-right: 2rem;
}

.toc-container {
    padding: 1.5rem;
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: 12px;
}

.toc-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin: 0 0 1rem;
    color: var(--color-gray-medium);
}

.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-list li {
    margin-bottom: 0.5rem;
}

.toc-list a {
    display: block;
    padding: 0.5rem 0;
    font-size: 0.875rem;
    color: var(--color-gray-dark);
    text-decoration: none;
    border-left: 2px solid transparent;
    padding-left: 0.75rem;
    transition: all 0.2s;
}

.toc-list a:hover {
    color: var(--accent-color);
    border-left-color: var(--accent-color);
}

.toc-list a.active {
    color: var(--color-foreground);
    border-left-color: var(--color-foreground);
    font-weight: 500;
}

.toc-list .toc-h3 {
    padding-left: 1.5rem;
    font-size: 0.8125rem;
}

/* ========================================
   RELATED POSTS
   ======================================== */

.related-posts {
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 1px solid var(--color-border);
}

.related-posts-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-serif);
    font-size: 1.5rem;
    margin: 0 0 2rem;
}

.related-posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.related-post-card {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s;
}

.related-post-card:hover {
    transform: translateY(-4px);
}

.related-post-image {
    aspect-ratio: 16 / 10;
    overflow: hidden;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.related-post-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.related-post-card:hover .related-post-image img {
    transform: scale(1.05);
}

.related-post-category {
    font-size: 0.625rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-color);
    margin-bottom: 0.25rem;
}

.related-post-title {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-weight: 500;
    margin: 0;
    line-height: 1.3;
}

/* ========================================
   KO-FI WIDGET
   ======================================== */

.ko-fi-widget {
    position: fixed;
    bottom: 24px; /* Same as #go-top default */
    right: 90px; /* To the left of go-top button (56px width + 24px right + 10px gap) */
    z-index: 100;
}

.ko-fi-button {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: #ff5e5b;
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: 0 4px 15px rgba(255, 94, 91, 0.3);
    transition: transform 0.2s, box-shadow 0.2s;
}

.ko-fi-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 94, 91, 0.4);
}

.ko-fi-icon {
    animation: kofi-wiggle 0.5s ease-in-out infinite alternate;
}

@keyframes kofi-wiggle {
    from { transform: rotate(-3deg); }
    to { transform: rotate(3deg); }
}

/* Adjust for sticky comment bar on blog posts */
body:has(.sticky-comment-bar) .ko-fi-widget {
    bottom: 5.5rem; /* Same as #go-top on blog posts */
}

@media (max-width: 768px) {
    .ko-fi-widget {
        bottom: 24px; /* Same as #go-top default */
        right: 80px; /* Adjusted for mobile (56px width + 24px right + gap) */
    }
    
    body:has(.sticky-comment-bar) .ko-fi-widget {
        bottom: 6rem; /* Same as #go-top on blog posts mobile */
    }
    
    .ko-fi-button span {
        display: none;
    }
    
    .ko-fi-button {
        padding: 0.75rem;
        border-radius: 50%;
    }
}

/* ========================================
   HIGHLIGHT & SHARE POPUP
   ======================================== */

.highlight-share-popup {
    position: absolute;
    display: none;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem;
    background: var(--color-foreground);
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    transform: translateX(-50%);
}

.highlight-share-popup.visible {
    display: flex;
}

.highlight-share-popup::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 6px solid var(--color-foreground);
}

.highlight-share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: transparent;
    border: none;
    border-radius: 6px;
    color: white;
    cursor: pointer;
    transition: background 0.2s;
}

.highlight-share-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* ========================================
   WEBMENTIONS
   ======================================== */

.webmention-section {
    margin-top: 3rem;
    padding: 2rem;
    background: var(--color-border);
    border-radius: 12px;
}

.webmention-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin: 0 0 1.5rem;
}

.webmention-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.webmention-stat {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--color-gray-medium);
}

.webmention-stat strong {
    color: var(--color-foreground);
}

.webmention-faces {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
}

.webmention-face {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid white;
}

/* ========================================
   PARALLAX HERO
   ======================================== */

.parallax-hero {
    position: relative;
    height: 60vh;
    min-height: 400px;
    overflow: hidden;
}

.parallax-bg {
    position: absolute;
    inset: -20%;
    background-size: cover;
    background-position: center;
    will-change: transform;
}

.parallax-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(0, 0, 0, 0.2) 0%,
        rgba(0, 0, 0, 0.4) 100%
    );
}

.parallax-content {
    position: relative;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 3rem;
    color: white;
}

/* ========================================
   RANDOM POST BUTTON
   ======================================== */

.random-post-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 20px;
    font-size: 0.875rem;
    color: var(--color-gray-dark);
    cursor: pointer;
    transition: all 0.2s;
}

.random-post-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.random-post-btn svg {
    transition: transform 0.3s;
}

.random-post-btn:hover svg {
    transform: rotate(180deg);
}

/* ========================================
   SERIES NAVIGATION
   ======================================== */

.series-nav {
    background: linear-gradient(135deg, #f8f5f0 0%, #f0e9de 100%);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.series-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.series-label {
    font-size: 0.625rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-gray-medium);
}

.series-title {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-weight: 600;
    margin: 0 0 1rem;
}

.series-posts {
    list-style: none;
    padding: 0;
    margin: 0;
    counter-reset: series;
}

.series-posts li {
    counter-increment: series;
    position: relative;
    padding-left: 2rem;
    margin-bottom: 0.5rem;
}

.series-posts li::before {
    content: counter(series);
    position: absolute;
    left: 0;
    width: 1.25rem;
    height: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.625rem;
    font-weight: 600;
    border: 1px solid var(--color-border);
    border-radius: 50%;
}

.series-posts li.current::before {
    background: var(--color-foreground);
    color: white;
    border-color: var(--color-foreground);
}

.series-posts a {
    font-size: 0.875rem;
    color: var(--color-gray-dark);
    text-decoration: none;
}

.series-posts a:hover {
    color: var(--accent-color);
}

.series-posts li.current a {
    font-weight: 600;
    color: var(--color-foreground);
}

/* ========================================
   PRINT BUTTON
   ======================================== */

.print-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 0.75rem;
    color: var(--color-gray-medium);
    cursor: pointer;
    transition: all 0.2s;
}

.print-btn:hover {
    border-color: var(--color-foreground);
    color: var(--color-foreground);
}

/* ========================================
   SMS SHARE BUTTON
   ======================================== */

.share-sms {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 0.75rem;
    color: var(--color-gray-medium);
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
}

.share-sms:hover {
    border-color: #25D366;
    color: #25D366;
}

/* ========================================
   RSS LINK
   ======================================== */

.rss-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--color-gray-medium);
    text-decoration: none;
    transition: color 0.2s;
}

.rss-link:hover {
    color: #f26522;
}

.rss-link svg {
    color: #f26522;
}