/* ============================================
   BLOG DETAIL PAGE - MODERN DESIGN SYSTEM
   ============================================ */

/* ===== ROOT VARIABLES ===== */
:root {
    --blog-primary: #2563eb;
    --blog-primary-dark: #1e40af;
    --blog-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --blog-gradient-alt: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --blog-text-primary: #1f2937;
    --blog-text-secondary: #6b7280;
    --blog-text-muted: #9ca3af;
    --blog-bg-light: #f9fafb;
    --blog-border: #e5e7eb;
    --blog-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --blog-shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --blog-shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --blog-radius: 12px;
    --blog-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== READING PROGRESS BAR ===== */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 4px;
    background: var(--blog-gradient);
    z-index: 9999;
    transition: width 0.1s ease-out;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.4);
}

/* ===== BREADCRUMB ENHANCEMENTS ===== */
.blog-breadcrumb {
    background: linear-gradient(to right, #f8f9fa, #ffffff);
    border-bottom: 2px solid var(--blog-border);
    padding: 1.5rem 0;
}

.blog-breadcrumb .breadcrumb {
    background: transparent;
    margin-bottom: 0;
    padding: 0;
}

.blog-breadcrumb .breadcrumb-item+.breadcrumb-item::before {
    content: "→";
    color: var(--blog-text-muted);
}

.blog-breadcrumb .breadcrumb-item a {
    color: var(--blog-text-secondary);
    text-decoration: none;
    transition: var(--blog-transition);
    font-weight: 500;
}

.blog-breadcrumb .breadcrumb-item a:hover {
    color: var(--blog-primary);
}

/* ===== ARTICLE CONTAINER ===== */
.blog-article-container {
    background: #ffffff;
    border-radius: var(--blog-radius);
    box-shadow: var(--blog-shadow-lg);
    overflow: hidden;
    transition: var(--blog-transition);
    border: 1px solid var(--blog-border);
}

.blog-article-container:hover {
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
}

/* ===== ARTICLE HEADER ===== */
.blog-article-header {
    padding: 2.5rem 2.5rem 1.5rem;
    background: linear-gradient(to bottom, #ffffff, #f9fafb);
}

.blog-article-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--blog-text-primary);
    line-height: 1.2;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

@media (max-width: 768px) {
    .blog-article-title {
        font-size: 1.875rem;
    }
}

/* ===== META INFORMATION ===== */
.blog-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 2px solid var(--blog-border);
    margin-bottom: 1.5rem;
}

.blog-meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--blog-text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

.blog-meta-item i {
    color: var(--blog-primary);
    font-size: 1.1rem;
}

.blog-meta-item.reading-time {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-weight: 600;
}

.blog-meta-item.reading-time i {
    color: white;
}

/* ===== SHORT DESCRIPTION (SAPO) ===== */
.blog-sapo {
    font-size: 1.25rem;
    line-height: 1.7;
    color: var(--blog-text-secondary);
    font-style: italic;
    font-weight: 500;
    padding: 1.5rem;
    margin: 0 2.5rem 2rem;
    background: linear-gradient(to right, rgba(102, 126, 234, 0.05), transparent);
    border-left: 4px solid var(--blog-primary);
    border-radius: 0 8px 8px 0;
}

/* ===== FEATURED IMAGE ===== */
.blog-featured-image {
    position: relative;
    margin: 0 2.5rem 2.5rem;
    border-radius: var(--blog-radius);
    overflow: hidden;
    box-shadow: var(--blog-shadow-md);
}

.blog-featured-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
}

.blog-featured-image:hover img {
    transform: scale(1.05);
}

/* ===== BLOG CONTENT ===== */
.blog-content {
    padding: 0 2.5rem 2.5rem;
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--blog-text-primary);
}

.blog-content p {
    margin-bottom: 1.5rem;
}

.blog-content h2,
.blog-content h3,
.blog-content h4 {
    font-weight: 700;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    color: var(--blog-text-primary);
    line-height: 1.3;
}

.blog-content h2 {
    font-size: 2rem;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid var(--blog-primary);
    display: inline-block;
}

.blog-content h3 {
    font-size: 1.5rem;
    color: var(--blog-primary-dark);
}

.blog-content h4 {
    font-size: 1.25rem;
}

.blog-content img {
    max-width: 100%;
    height: auto !important;
    border-radius: var(--blog-radius);
    margin: 2rem 0;
    box-shadow: var(--blog-shadow-md);
    transition: var(--blog-transition);
}

.blog-content img:hover {
    box-shadow: var(--blog-shadow-lg);
    transform: translateY(-2px);
}

.blog-content ul,
.blog-content ol {
    margin: 1.5rem 0;
    padding-left: 2rem;
}

.blog-content li {
    margin-bottom: 0.75rem;
    line-height: 1.7;
}

.blog-content blockquote {
    margin: 2rem 0;
    padding: 1.5rem 2rem;
    background: var(--blog-bg-light);
    border-left: 4px solid var(--blog-primary);
    border-radius: 0 8px 8px 0;
    font-style: italic;
    color: var(--blog-text-secondary);
}

.blog-content code {
    background: #f3f4f6;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.9em;
    color: #e11d48;
    font-family: 'Courier New', monospace;
}

.blog-content pre {
    background: #1f2937;
    color: #f9fafb;
    padding: 1.5rem;
    border-radius: var(--blog-radius);
    overflow-x: auto;
    margin: 1.5rem 0;
}

.blog-content pre code {
    background: transparent;
    color: inherit;
    padding: 0;
}

.blog-content a {
    color: var(--blog-primary);
    text-decoration: underline;
    transition: var(--blog-transition);
}

.blog-content a:hover {
    color: var(--blog-primary-dark);
}

/* ===== SOCIAL SHARE SECTION ===== */
.blog-share-section {
    margin: 3rem 2.5rem 2.5rem;
    padding: 2rem;
    background: linear-gradient(135deg, #f9fafb 0%, #ffffff 100%);
    border-radius: var(--blog-radius);
    border: 2px dashed var(--blog-border);
}

.blog-share-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--blog-text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.blog-share-title i {
    color: var(--blog-primary);
}

.blog-share-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.blog-share-btn {
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--blog-transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: var(--blog-shadow-sm);
}

.blog-share-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--blog-shadow-md);
}

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

.blog-share-btn.facebook:hover {
    background: #0c63d4;
}

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

.blog-share-btn.twitter:hover {
    background: #0d8bd9;
}

.blog-share-btn.pinterest {
    background: #e60023;
    color: white;
}

.blog-share-btn.pinterest:hover {
    background: #c50018;
}

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

.blog-share-btn.linkedin:hover {
    background: #005885;
}

/* ===== SIDEBAR ===== */
.blog-sidebar {
    position: sticky;
    top: 2rem;
}

/* ===== RELATED POSTS CARD ===== */
.blog-related-card {
    background: white;
    border-radius: var(--blog-radius);
    box-shadow: var(--blog-shadow-md);
    overflow: hidden;
    margin-bottom: 2rem;
    border: 1px solid var(--blog-border);
    transition: var(--blog-transition);
}

.blog-related-card:hover {
    box-shadow: var(--blog-shadow-lg);
    transform: translateY(-4px);
}

.blog-related-header {
    background: var(--blog-gradient);
    color: white;
    padding: 1.25rem 1.5rem;
    font-weight: 700;
    font-size: 1.125rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.blog-related-header i {
    font-size: 1.25rem;
}

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

.blog-related-item {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--blog-border);
    transition: var(--blog-transition);
    display: flex;
    gap: 1rem;
    align-items: center;
    text-decoration: none;
    color: inherit;
}

.blog-related-item:last-child {
    border-bottom: none;
}

.blog-related-item:hover {
    background: var(--blog-bg-light);
    transform: translateX(5px);
}

.blog-related-item-image {
    width: 90px;
    height: 90px;
    border-radius: 8px;
    object-fit: cover;
    flex-shrink: 0;
    box-shadow: var(--blog-shadow-sm);
}

.blog-related-item-content {
    flex: 1;
}

.blog-related-item-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--blog-text-primary);
    margin-bottom: 0.5rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: var(--blog-transition);
}

.blog-related-item:hover .blog-related-item-title {
    color: var(--blog-primary);
}

.blog-related-item-date {
    font-size: 0.875rem;
    color: var(--blog-text-muted);
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

/* ===== PROMOTIONAL BANNER ===== */
.blog-promo-banner {
    background: var(--blog-gradient);
    border-radius: var(--blog-radius);
    padding: 3rem 2rem;
    text-align: center;
    color: white;
    box-shadow: var(--blog-shadow-lg);
    position: relative;
    overflow: hidden;
}

.blog-promo-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 0.5;
    }

    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

.blog-promo-title {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.blog-promo-text {
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
    opacity: 0.95;
    position: relative;
    z-index: 1;
}

.blog-promo-btn {
    background: white;
    color: var(--blog-primary);
    padding: 0.875rem 2rem;
    border-radius: 50px;
    font-weight: 700;
    text-decoration: none;
    display: inline-block;
    transition: var(--blog-transition);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    position: relative;
    z-index: 1;
}

.blog-promo-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    color: var(--blog-primary-dark);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 992px) {
    .blog-sidebar {
        position: static;
        margin-top: 3rem;
    }

    .blog-article-header {
        padding: 2rem 1.5rem 1rem;
    }

    .blog-sapo,
    .blog-featured-image,
    .blog-content,
    .blog-share-section {
        margin-left: 1.5rem;
        margin-right: 1.5rem;
    }

    .blog-content {
        padding: 0 1.5rem 2rem;
    }
}

@media (max-width: 576px) {
    .blog-article-header {
        padding: 1.5rem 1rem 0.75rem;
    }

    .blog-sapo,
    .blog-featured-image,
    .blog-content,
    .blog-share-section {
        margin-left: 1rem;
        margin-right: 1rem;
    }

    .blog-content {
        padding: 0 1rem 1.5rem;
        font-size: 1rem;
    }

    .blog-meta {
        gap: 1rem;
    }

    .blog-share-buttons {
        flex-direction: column;
    }

    .blog-share-btn {
        width: 100%;
        justify-content: center;
    }

    .blog-related-item-image {
        width: 70px;
        height: 70px;
    }
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.blog-article-container {
    animation: fadeInUp 0.6s ease-out;
}

.blog-related-card {
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.blog-promo-banner {
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

/* ===== SCROLL ANIMATIONS ===== */
.scroll-fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.scroll-fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   TEXT-TO-SPEECH (TTS) CONTROLS
   ============================================ */

/* ===== TTS CONTROL PANEL ===== */
.tts-control-panel {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: white;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    padding: 1.25rem 1.5rem;
    z-index: 9998;
    min-width: 320px;
    border: 2px solid var(--blog-border);
    transition: var(--blog-transition);
    animation: slideInUp 0.4s ease-out;
}

.tts-control-panel.hidden {
    display: none;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(100px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tts-control-panel:hover {
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.25);
}

/* ===== TTS HEADER ===== */
.tts-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--blog-border);
}

.tts-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1rem;
    color: var(--blog-text-primary);
}

.tts-title i {
    color: var(--blog-primary);
    font-size: 1.25rem;
}

.tts-close-btn {
    background: transparent;
    border: none;
    color: var(--blog-text-muted);
    cursor: pointer;
    font-size: 1.25rem;
    padding: 0.25rem;
    transition: var(--blog-transition);
    line-height: 1;
}

.tts-close-btn:hover {
    color: var(--blog-text-primary);
    transform: rotate(90deg);
}

/* ===== TTS MAIN CONTROLS ===== */
.tts-main-controls {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.tts-btn {
    flex: 1;
    padding: 0.75rem;
    border: none;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--blog-transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: var(--blog-shadow-sm);
}

.tts-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--blog-shadow-md);
}

.tts-btn:active {
    transform: translateY(0);
}

.tts-btn.play {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.tts-btn.play:hover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
}

.tts-btn.pause {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white;
}

.tts-btn.pause:hover {
    background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
}

.tts-btn.stop {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
}

.tts-btn.stop:hover {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
}

.tts-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* ===== TTS PROGRESS BAR ===== */
.tts-progress-container {
    margin-bottom: 1rem;
}

.tts-progress-label {
    font-size: 0.85rem;
    color: var(--blog-text-secondary);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.tts-progress-bar {
    width: 100%;
    height: 6px;
    background: var(--blog-bg-light);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.tts-progress-fill {
    height: 100%;
    background: var(--blog-gradient);
    border-radius: 10px;
    transition: width 0.3s ease;
    width: 0%;
}

/* ===== TTS SETTINGS ===== */
.tts-settings {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.tts-setting-group {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.tts-setting-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--blog-text-secondary);
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.tts-setting-label i {
    color: var(--blog-primary);
    font-size: 0.9rem;
}

.tts-select,
.tts-range {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--blog-border);
    border-radius: 8px;
    font-size: 0.9rem;
    transition: var(--blog-transition);
    background: white;
}

.tts-select:focus,
.tts-range:focus {
    outline: none;
    border-color: var(--blog-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.tts-range {
    padding: 0;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--blog-bg-light);
    cursor: pointer;
}

.tts-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--blog-primary);
    cursor: pointer;
    transition: var(--blog-transition);
}

.tts-range::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.2);
}

.tts-range::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--blog-primary);
    cursor: pointer;
    border: none;
    transition: var(--blog-transition);
}

.tts-range::-moz-range-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.2);
}

.tts-speed-value {
    display: inline-block;
    background: var(--blog-gradient);
    color: white;
    padding: 0.25rem 0.625rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 700;
    margin-left: 0.5rem;
}

/* ===== TTS TEXT HIGHLIGHTING ===== */
.tts-highlight {
    background: linear-gradient(120deg, rgba(255, 214, 0, 0.3) 0%, rgba(255, 214, 0, 0.5) 100%);
    padding: 0.125rem 0.25rem;
    border-radius: 3px;
    transition: background 0.3s ease;
    box-shadow: 0 2px 8px rgba(255, 214, 0, 0.3);
}

/* ===== TTS TOGGLE BUTTON (FLOATING) ===== */
.tts-toggle-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--blog-gradient);
    color: white;
    border: none;
    cursor: pointer;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    z-index: 9997;
    transition: var(--blog-transition);
    animation: pulse-ring 2s ease-in-out infinite;
}

.tts-toggle-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.5);
}

.tts-toggle-btn.hidden {
    display: none;
}

@keyframes pulse-ring {

    0%,
    100% {
        box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4), 0 0 0 0 rgba(102, 126, 234, 0.4);
    }

    50% {
        box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4), 0 0 0 15px rgba(102, 126, 234, 0);
    }
}

/* ===== TTS STATUS INDICATOR ===== */
.tts-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: var(--blog-bg-light);
    border-radius: 8px;
    font-size: 0.85rem;
    color: var(--blog-text-secondary);
    margin-top: 0.75rem;
}

.tts-status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--blog-text-muted);
    animation: pulse-dot 1.5s ease-in-out infinite;
}

.tts-status.playing .tts-status-dot {
    background: #10b981;
}

.tts-status.paused .tts-status-dot {
    background: #f59e0b;
    animation: none;
}

@keyframes pulse-dot {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }
}

/* ===== RESPONSIVE TTS CONTROLS ===== */
@media (max-width: 768px) {
    .tts-control-panel {
        bottom: 1rem;
        right: 1rem;
        left: 1rem;
        min-width: auto;
        padding: 1rem;
    }

    .tts-toggle-btn {
        bottom: 1rem;
        right: 1rem;
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }

    .tts-main-controls {
        gap: 0.5rem;
    }

    .tts-btn {
        padding: 0.625rem;
        font-size: 0.85rem;
    }
}

@media (max-width: 576px) {
    .tts-control-panel {
        bottom: 0.5rem;
        right: 0.5rem;
        left: 0.5rem;
    }

    .tts-toggle-btn {
        bottom: 0.5rem;
        right: 0.5rem;
    }

    .tts-main-controls {
        flex-direction: column;
    }

    .tts-btn {
        width: 100%;
    }
}