/**
 * Advanced Features Styles
 * Dark Mode, Reading Progress, Social Share, Infinite Scroll, Advanced Search
 */

/* ============================================
   DARK MODE STYLES
   ============================================ */

.dark-mode-toggle {
    position: fixed;
    bottom: 80px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--cd-navy);
    border: none;
    cursor: pointer;
    z-index: 9998;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.dark-mode-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0,0,0,0.2);
}

.dark-mode-toggle .toggle-icon {
    position: absolute;
    font-size: 20px;
    color: white;
    transition: all 0.3s ease;
}

.dark-mode-toggle .sun-icon {
    opacity: 1;
    transform: rotate(0deg);
}

.dark-mode-toggle .moon-icon {
    opacity: 0;
    transform: rotate(180deg);
}

.dark-mode-toggle.active .sun-icon {
    opacity: 0;
    transform: rotate(-180deg);
}

.dark-mode-toggle.active .moon-icon {
    opacity: 1;
    transform: rotate(0deg);
}

/* Dark Mode Color Scheme */
body.dark-mode {
    background-color: #0f172a;
    color: #e2e8f0;
}

.dark-mode .bg-white {
    background-color: #1e293b !important;
}

.dark-mode .card,
.dark-mode .modal-content {
    background-color: #1e293b;
    border-color: #334155;
    color: #e2e8f0;
}

.dark-mode .text-dark,
.dark-mode .text-muted {
    color: #cbd5e1 !important;
}

.dark-mode .border {
    border-color: #334155 !important;
}

.dark-mode input,
.dark-mode textarea,
.dark-mode select {
    background-color: #0f172a;
    border-color: #334155;
    color: #e2e8f0;
}

.dark-mode .navbar {
    background-color: #1e293b !important;
    border-bottom-color: #334155;
}

/* ============================================
   READING PROGRESS BAR
   ============================================ */

.reading-progress-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: rgba(0,0,0,0.05);
    z-index: 9999;
}

.reading-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--cd-orange), var(--cd-purple));
    width: 0%;
    transition: width 0.1s ease;
}

.reading-time-estimate {
    position: fixed;
    top: 10px;
    right: 20px;
    background: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 13px;
    color: var(--cd-text-muted);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    z-index: 9998;
}

.dark-mode .reading-time-estimate {
    background: #1e293b;
    color: #cbd5e1;
}

/* Scroll to Top Button */
.scroll-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--cd-orange);
    color: white;
    border: none;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 9998;
    box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
}

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

.scroll-to-top:hover {
    background: var(--cd-orange-hover);
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4);
}

/* ============================================
   SOCIAL SHARE BUTTONS
   ============================================ */

.social-share-wrapper {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: #f8fafc;
    border-radius: 12px;
    margin: 30px 0;
}

.dark-mode .social-share-wrapper {
    background: #1e293b;
}

.share-label {
    font-weight: 600;
    color: var(--cd-text-dark);
    display: flex;
    align-items: center;
    gap: 8px;
}

.dark-mode .share-label {
    color: #e2e8f0;
}

.share-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.share-btn {
    position: relative;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: white;
    transition: all 0.3s ease;
}

.share-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}

.share-btn.facebook {
    background: #1877f2;
}

.share-btn.twitter {
    background: #1da1f2;
}

.share-btn.linkedin {
    background: #0077b5;
}

.share-btn.whatsapp {
    background: #25d366;
}

.share-btn.telegram {
    background: #0088cc;
}

.share-btn.copy-link,
.share-btn.native-share {
    background: var(--cd-navy);
}

.share-count {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--cd-orange);
    color: white;
    font-size: 10px;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 10px;
    opacity: 0;
    transform: scale(0);
    transition: all 0.3s ease;
}

.share-count.show {
    opacity: 1;
    transform: scale(1);
}

.share-notification {
    position: fixed;
    bottom: 100px;
    right: 20px;
    background: var(--cd-green);
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    z-index: 10000;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
}

.share-notification.show {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   INFINITE SCROLL
   ============================================ */

.infinite-scroll-loader {
    text-align: center;
    padding: 40px 20px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.infinite-scroll-loader.show {
    opacity: 1;
    visibility: visible;
}

.loader-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f4f6;
    border-top-color: var(--cd-orange);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px;
}

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

.infinite-scroll-end,
.infinite-scroll-error {
    text-align: center;
    color: var(--cd-text-muted);
}

.infinite-scroll-end i,
.infinite-scroll-error i {
    font-size: 32px;
    margin-bottom: 10px;
    display: block;
}

.infinite-scroll-end i {
    color: var(--cd-green);
}

.infinite-scroll-error i {
    color: var(--cd-orange);
}

/* ============================================
   ADVANCED SEARCH
   ============================================ */

.advanced-search-wrapper {
    position: relative;
}

#advanced-search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.15);
    max-height: 600px;
    overflow-y: auto;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    margin-top: 10px;
}

#advanced-search-results.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dark-mode #advanced-search-results {
    background: #1e293b;
    border: 1px solid #334155;
}

#search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

#search-overlay.show {
    opacity: 1;
    visibility: visible;
}

.search-category {
    padding: 15px;
    border-bottom: 1px solid #e5e7eb;
}

.dark-mode .search-category {
    border-bottom-color: #334155;
}

.search-category:last-child {
    border-bottom: none;
}

.search-category-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--cd-text-muted);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.search-result-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: 8px;
    text-decoration: none;
    color: var(--cd-text-dark);
    transition: all 0.2s ease;
}

.dark-mode .search-result-item {
    color: #e2e8f0;
}

.search-result-item:hover {
    background: #f8fafc;
}

.dark-mode .search-result-item:hover {
    background: #0f172a;
}

.result-thumb {
    width: 50px;
    height: 50px;
    object-fit: cover;
    border-radius: 6px;
}

.result-content {
    flex: 1;
}

.result-title {
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 4px;
}

.result-title mark {
    background: var(--cd-orange-light);
    color: var(--cd-orange);
    padding: 2px 4px;
    border-radius: 3px;
}

.result-excerpt {
    font-size: 12px;
    color: var(--cd-text-muted);
    line-height: 1.4;
}

.result-meta {
    font-size: 11px;
    color: var(--cd-text-light);
    margin-top: 4px;
}

.result-arrow {
    color: var(--cd-text-light);
    font-size: 16px;
}

.search-loading,
.search-error,
.no-results {
    text-align: center;
    padding: 40px 20px;
    color: var(--cd-text-muted);
}

.search-loading .spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f4f6;
    border-top-color: var(--cd-orange);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px;
}

.search-section {
    padding: 15px;
    border-bottom: 1px solid #e5e7eb;
}

.dark-mode .search-section {
    border-bottom-color: #334155;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.section-header h6 {
    font-size: 13px;
    font-weight: 600;
    color: var(--cd-text-muted);
    margin: 0;
}

.clear-recent-searches {
    font-size: 12px;
    color: var(--cd-orange);
    text-decoration: none;
}

.recent-searches,
.trending-searches {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.recent-search-item,
.trending-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: #f8fafc;
    border-radius: 20px;
    font-size: 13px;
    color: var(--cd-text-dark);
    text-decoration: none;
    transition: all 0.2s ease;
}

.dark-mode .recent-search-item,
.dark-mode .trending-item {
    background: #0f172a;
    color: #e2e8f0;
}

.recent-search-item:hover,
.trending-item:hover {
    background: var(--cd-orange-light);
    color: var(--cd-orange);
}

.trending-count {
    background: var(--cd-orange);
    color: white;
    font-size: 11px;
    padding: 2px 6px;
    border-radius: 10px;
    font-weight: 600;
}

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

@media (max-width: 768px) {
    .dark-mode-toggle,
    .scroll-to-top {
        width: 44px;
        height: 44px;
    }
    
    .dark-mode-toggle {
        bottom: 70px;
        right: 15px;
    }
    
    .scroll-to-top {
        bottom: 15px;
        right: 15px;
    }
    
    .reading-time-estimate {
        top: 8px;
        right: 15px;
        font-size: 12px;
        padding: 6px 12px;
    }
    
    .social-share-wrapper {
        flex-direction: column;
        align-items: flex-start;
    }
    
    #advanced-search-results {
        max-height: 400px;
    }
}