/* Knowledge Details Page - Modern Blue Theme with Sharp Edges */

:root {
    --primary-blue: #1e40af;
    --dark-blue: #1e3a8a;
    --light-blue: #3b82f6;
    --accent-blue: #60a5fa;
    --bg-gray: #f8fafc;
    --border-gray: #e2e8f0;
    --text-dark: #1e293b;
    --text-gray: #64748b;
}

body {
    background: #ffffff;
}

/* Header Section - Sharp & Professional */
.knowledge-detail-header {
    padding: 113px 0 30px 0;
    background: linear-gradient(180deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.knowledge-detail-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 20px,
        rgba(255,255,255,0.02) 20px,
        rgba(255,255,255,0.02) 40px
    );
}

.knowledge-detail-header .container {
    position: relative;
    z-index: 1;
}

.knowledge-detail-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 25px;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

body.th .knowledge-detail-title {
    font-size: 3rem;
    line-height: 1.3;
}

.knowledge-detail-meta {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 30px;
    flex-wrap: wrap;
    margin-top: 30px;
}

.knowledge-category-badge {
    display: inline-flex;
    align-items: center;
    padding: 12px 28px;
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    transition: all 0.3s ease;
}

.knowledge-category-badge:hover {
    background: white;
    color: var(--primary-blue);
    border-color: white;
}

.knowledge-date {
    font-size: 1.05rem;
    opacity: 0.9;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
    letter-spacing: 0.3px;
}

.knowledge-date::before {
    content: '';
    width: 20px;
    height: 20px;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="white"><path d="M19 4h-1V2h-2v2H8V2H6v2H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V6c0-1.1-.9-2-2-2zm0 16H5V10h14v10zm0-12H5V6h14v2z"/></svg>') center/contain no-repeat;
}

.knowledge-detail-content {
    padding: 15px 0;
    background: var(--bg-gray);
}

/* Back Link - Sharp Design */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 700;
    margin-bottom: 15px;
    transition: all 0.3s ease;
    font-size: 1.05rem;
    padding: 4px 6px;
    border: 2px solid var(--primary-blue);
    background: white;
}

.back-link:hover {
    background: var(--primary-blue);
    color: white;
    transform: translateX(-5px);
}

.back-link span:first-child {
    font-size: 1.2em;
}

/* Image Gallery - Sharp Grid */
.image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 5px;
    margin-bottom: 15px;
}

.gallery-item {
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    display: block;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 3px solid var(--border-gray);
    position: relative;
    background: white;
}

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(30, 64, 175, 0.3);
    border-color: var(--primary-blue);
}

.gallery-item img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    display: block;
    transition: transform 0.3s ease;
}

.gallery-item:hover img {
    transform: scale(1.05);
    filter: brightness(0.7);
}

/* PDF Section - New Sharp Design */
.pdf-downloads {
    background: white;
    padding: 40px 50px;
    margin-bottom: 15px;
    border: 3px solid var(--primary-blue);
    border-left-width: 8px;
}

.pdf-downloads .lang-en,
.pdf-downloads .lang-th {
    display: none !important;
}

body.en .pdf-downloads .lang-en {
    display: inline !important;
}

body.th .pdf-downloads .lang-th {
    display: inline !important;
}

.pdf-downloads-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-gray);
}

.pdf-downloads-header i {
    font-size: 2rem;
    color: var(--primary-blue);
}

.pdf-downloads-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pdf-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.pdf-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px 25px;
    background: var(--bg-gray);
    border: 2px solid var(--border-gray);
    transition: all 0.3s ease;
    cursor: pointer;
}

.pdf-item:hover {
    border-color: var(--primary-blue);
    background: white;
    box-shadow: 0 4px 12px rgba(30, 64, 175, 0.15);
    transform: translateY(-2px);
}

.pdf-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-blue);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.pdf-info {
    flex: 1;
    min-width: 0;
}

.pdf-name {
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 5px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 1.05rem;
}

.pdf-meta {
    font-size: 0.9rem;
    color: var(--text-gray);
}

.pdf-download {
    width: 40px;
    height: 40px;
    background: var(--primary-blue);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.pdf-item:hover .pdf-download {
    background: var(--dark-blue);
}

/* Summary - Sharp Professional */
.knowledge-summary {
    background: white;
    padding: 15px 15px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    border-left: 6px solid var(--primary-blue);
    position: relative;
    margin-bottom: 15px;
}

.knowledge-summary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-blue);
}

.knowledge-summary {
    font-size: 1.25rem;
    color: #000000;
    line-height: 1.8;
    font-weight: 600;
}

body.th .knowledge-summary {
    font-size: 1.15rem;
    line-height: 1.9;
}

/* Article Content - Sharp & Clean */
.knowledge-article-content {
    background: white;
    padding: 15px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
    line-height: 1.8;
    font-size: 1.1rem;
    color: var(--text-gray);
    border: 3px solid var(--border-gray);
    position: relative;
}

.knowledge-article-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-blue);
}

body.th .knowledge-article-content {
    font-size: 1.05rem;
    line-height: 1.9;
}

.knowledge-article-content h1,
.knowledge-article-content h2,
.knowledge-article-content h3,
.knowledge-article-content h4,
.knowledge-article-content h5,
.knowledge-article-content h6 {
    color: var(--text-dark);
    margin-bottom: 20px;
    margin-top: 45px;
    font-weight: 700;
    line-height: 1.3;
    position: relative;
}

.knowledge-article-content h1:first-child,
.knowledge-article-content h2:first-child,
.knowledge-article-content h3:first-child {
    margin-top: 0;
}

.knowledge-article-content h1 {
    font-size: 2.5rem;
    color: var(--primary-blue);
    border-bottom: 3px solid var(--primary-blue);
    padding-bottom: 15px;
    letter-spacing: -0.01em;
}

body.th .knowledge-article-content h1 {
    font-size: 2.3rem;
}

.knowledge-article-content h2 {
    font-size: 2rem;
    color: var(--primary-blue);
    border-left: 6px solid var(--primary-blue);
    padding-left: 25px;
    padding-bottom: 0;
}

body.th .knowledge-article-content h2 {
    font-size: 1.85rem;
}

.knowledge-article-content h3 {
    font-size: 1.6rem;
    color: var(--text-dark);
    padding-left: 20px;
    border-left: 4px solid var(--dark-blue);
}

body.th .knowledge-article-content h3 {
    font-size: 1.5rem;
}

.knowledge-article-content h4 {
    font-size: 1.3rem;
    color: var(--text-dark);
}

.knowledge-article-content h5 {
    font-size: 1.15rem;
    color: var(--text-dark);
}

.knowledge-article-content h6 {
    font-size: 1rem;
    color: var(--text-gray);
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

.knowledge-article-content p {
    margin-bottom: 20px;
    text-align: justify;
    color: var(--text-gray);
}

.knowledge-article-content p:last-child {
    margin-bottom: 0;
}

.knowledge-article-content ul,
.knowledge-article-content ol {
    padding-left: 45px;
    margin-bottom: 25px;
    margin-top: 15px;
}

.knowledge-article-content ul {
    list-style-type: none;
}

.knowledge-article-content ul li {
    margin-bottom: 12px;
    position: relative;
    padding-left: 10px;
    color: var(--text-gray);
    line-height: 1.8;
}

.knowledge-article-content ul li::before {
    content: '';
    position: absolute;
    left: -30px;
    top: 10px;
    width: 8px;
    height: 8px;
    background: var(--primary-blue);
}

.knowledge-article-content ol {
    counter-reset: custom-counter;
    list-style: none;
}

.knowledge-article-content ol li {
    margin-bottom: 12px;
    position: relative;
    padding-left: 10px;
    counter-increment: custom-counter;
    color: var(--text-gray);
    line-height: 1.8;
}

.knowledge-article-content ol li::before {
    content: counter(custom-counter);
    position: absolute;
    left: -35px;
    background: var(--primary-blue);
    color: white;
    width: 26px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85em;
    font-weight: 700;
}

.knowledge-article-content strong,
.knowledge-article-content b {
    color: var(--text-dark);
    font-weight: 700;
}

.knowledge-article-content em,
.knowledge-article-content i {
    font-style: italic;
    color: var(--text-gray);
}

.knowledge-article-content u {
    text-decoration: underline;
    text-decoration-color: var(--primary-blue);
    text-decoration-thickness: 2px;
}

.knowledge-article-content s,
.knowledge-article-content strike,
.knowledge-article-content del {
    text-decoration: line-through;
    opacity: 0.7;
}

.knowledge-article-content blockquote {
    border-left: 6px solid var(--primary-blue);
    padding: 30px 40px;
    margin: 35px 0;
    background: var(--bg-gray);
    font-style: italic;
    color: var(--text-gray);
    position: relative;
    font-size: 1.1em;
}

.knowledge-article-content blockquote::before {
    content: '\f10d';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    top: 20px;
    left: 15px;
    font-size: 2.5rem;
    color: var(--primary-blue);
    opacity: 0.2;
}

.knowledge-article-content blockquote p {
    position: relative;
    z-index: 1;
    margin-bottom: 10px;
}

.knowledge-article-content blockquote p:last-child {
    margin-bottom: 0;
}

.knowledge-article-content code {
    background: var(--bg-gray);
    padding: 4px 10px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    color: #dc2626;
    border: 1px solid var(--border-gray);
}

.knowledge-article-content pre {
    background: #1e293b;
    color: #e2e8f0;
    padding: 25px;
    overflow-x: auto;
    margin: 30px 0;
    border: 3px solid var(--primary-blue);
    line-height: 1.6;
}

.knowledge-article-content pre code {
    background: transparent;
    padding: 0;
    border: none;
    color: inherit;
    font-size: 0.95em;
}

.knowledge-article-content table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: 35px 0;
    border: 3px solid var(--primary-blue);
    overflow: hidden;
}

.knowledge-article-content table thead {
    background: var(--primary-blue);
    color: white;
}

.knowledge-article-content table th {
    padding: 18px 24px;
    text-align: left;
    font-weight: 700;
    font-size: 0.95em;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    border: none;
}

.knowledge-article-content table td {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-gray);
    color: var(--text-gray);
    vertical-align: top;
}

.knowledge-article-content table tbody tr {
    transition: all 0.2s ease;
}

.knowledge-article-content table tbody tr:nth-child(even) {
    background: var(--bg-gray);
}

.knowledge-article-content table tbody tr:hover {
    background: rgba(30, 64, 175, 0.05);
}

.knowledge-article-content table tbody tr:last-child td {
    border-bottom: none;
}

.knowledge-article-content table td:first-child,
.knowledge-article-content table th:first-child {
    font-weight: 700;
    color: var(--primary-blue);
}

.knowledge-article-content img {
    max-width: 100%;
    height: auto;
    margin: 30px 0;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    display: block;
    border: 3px solid var(--border-gray);
}

.knowledge-article-content hr {
    border: none;
    height: 3px;
    background: var(--primary-blue);
    margin: 45px 0;
}

.knowledge-article-content sup {
    vertical-align: super;
    font-size: 0.75em;
}

.knowledge-article-content sub {
    vertical-align: sub;
    font-size: 0.75em;
}

.knowledge-article-content a {
    color: var(--primary-blue);
    text-decoration: none;
    border-bottom: 2px solid var(--primary-blue);
    transition: all 0.3s ease;
    font-weight: 600;
}

.knowledge-article-content a:hover {
    color: var(--dark-blue);
    border-bottom-color: var(--dark-blue);
}

/* Responsive */
@media (max-width: 968px) {
    .knowledge-detail-header {
        padding: 120px 0 60px 0;
    }

    .knowledge-detail-title {
        font-size: 2.5rem;
    }

    body.th .knowledge-detail-title {
        font-size: 2.2rem;
    }

    .knowledge-article-content {
        padding: 45px 35px;
    }

    .pdf-downloads {
        padding: 35px 30px;
    }

    .pdf-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .knowledge-detail-title {
        font-size: 2rem;
    }

    body.th .knowledge-detail-title {
        font-size: 1.8rem;
    }

    .knowledge-article-content {
        padding: 35px 25px;
        font-size: 1.05rem;
    }

    body.th .knowledge-article-content {
        font-size: 1rem;
    }

    .image-gallery {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .gallery-item img {
        height: 250px;
    }

    .knowledge-summary {
        font-size: 1.15rem;
        padding: 30px 25px;
    }

    .pdf-downloads {
        padding: 30px 20px;
    }

    .pdf-item {
        padding: 15px 20px;
    }
}

@media (max-width: 480px) {
    .knowledge-detail-header {
        padding: 100px 0 50px 0;
    }

    .knowledge-detail-title {
        font-size: 1.7rem;
    }

    body.th .knowledge-detail-title {
        font-size: 1.6rem;
    }

    .knowledge-article-content {
        padding: 25px 20px;
    }

    .knowledge-article-content h1 {
        font-size: 1.9rem;
    }

    .knowledge-article-content h2 {
        font-size: 1.6rem;
    }

    .knowledge-article-content h3 {
        font-size: 1.3rem;
    }

    .knowledge-summary {
        font-size: 1.05rem;
        padding: 25px 20px;
    }

    .pdf-downloads-header h3 {
        font-size: 1.2rem;
    }

    .pdf-icon {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }

    .pdf-download {
        width: 35px;
        height: 35px;
    }
}