/* ---- LAYOUT ---- */
.ct-main-wrap {
    background: #F8FAFC;
    padding: 60px 0 80px;
    min-height: 50vh;
}
.ct-layout-centered {
    max-width: 860px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ---- ARTICLE ---- */
.ct-article {
    background: #fff;
    padding: 60px 80px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.03);
    border: 1px solid #E2E8F0;
}

/* ---- ACADEMIC HEADER ---- */
.ct-breadcrumb-academic {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: #64748B;
    margin-bottom: 30px;
    font-family: 'Inter', sans-serif;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.ct-breadcrumb-academic a {
    color: #003580;
    text-decoration: none;
    font-weight: 600;
}
.ct-academic-header {
    border-bottom: 1px solid #E2E8F0;
    padding-bottom: 30px;
    margin-bottom: 40px;
    text-align: center;
}
.ct-academic-title {
    font-family: 'Merriweather', 'Times New Roman', serif;
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 700;
    color: #0f172a;
    line-height: 1.35;
    margin-bottom: 24px;
}
.ct-academic-meta {
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    color: #475569;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
}
.ct-academic-author {
    font-weight: 600;
    color: #003580;
}
.ct-meta-divider {
    color: #CBD5E1;
}

/* ---- ACADEMIC ABSTRACT & FIGURE ---- */
.ct-academic-abstract {
    font-family: 'Merriweather', 'Times New Roman', serif;
    font-size: 16px;
    line-height: 1.8;
    color: #334155;
    background: #F8FAFC;
    padding: 30px 40px;
    margin: 0 0 40px;
    border-left: 4px solid #003580;
    font-style: italic;
}
.ct-academic-abstract strong {
    font-family: 'Inter', sans-serif;
    font-weight: 700;
    font-style: normal;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 13px;
    color: #003580;
}
.ct-academic-figure {
    margin: 0 0 40px 0;
    width: 100%;
}
.ct-academic-figure img {
    width: 100%;
    height: auto;
    display: block;
}

/* ---- BODY CONTENT (từ rich text editor) ---- */
.ct-body {
    font-family: 'Merriweather', 'Times New Roman', serif;
    font-size: 18px;
    line-height: 1.9;
    color: #1e293b;
}
.ct-body p {
    margin-bottom: 24px;
    text-align: left;
}
.ct-body h1, .ct-body h2, .ct-body h3, .ct-body h4 {
    font-family: 'Inter', sans-serif;
    color: #0f172a;
    margin: 48px 0 20px;
    font-weight: 700;
    line-height: 1.35;
}
.ct-body h1 { font-size: 24px; }
.ct-body h2 { font-size: 21px; border-bottom: 2px solid #E8EDF5; padding-bottom: 8px; }
.ct-body h3 { font-size: 18px; }
.ct-body h4 { font-size: 16px; color: #1565C0; }
.ct-body ul, .ct-body ol {
    margin-bottom: 20px;
    padding-left: 22px;
}
.ct-body li {
    margin-bottom: 10px;
    line-height: 1.75;
}
/* Style đẹp cho bullet list (như ảnh mẫu) */
.ct-body ul li {
    list-style: none;
    padding-left: 8px;
    position: relative;
}
.ct-body ul li::before {
    content: "•";
    color: #003580;
    font-weight: 700;
    position: absolute;
    left: -16px;
    font-size: 16px;
}
.ct-body ul li strong, .ct-body ol li strong {
    color: #003580;
    font-weight: 700;
}
.ct-body a {
    color: #003580;
    text-decoration: underline;
    font-weight: 600;
    transition: color 0.2s;
}
.ct-body a:hover { color: #1565C0; text-decoration: none; }
.ct-body img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    margin: 24px 0;
    display: block;
}
.ct-body blockquote {
    border-left: 3px solid #CBD5E1;
    margin: 32px 40px;
    padding: 0 20px;
    font-style: italic;
    color: #475569;
}
.ct-body table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 32px;
    font-size: 15px;
    font-family: 'Inter', sans-serif;
}
.ct-body table th {
    background: #F8FAFC;
    color: #0F172A;
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid #CBD5E1;
    border-top: 2px solid #CBD5E1;
}
.ct-body table td {
    padding: 9px 14px;
    border-bottom: 1px solid #E2E8F0;
}
.ct-body table tr:nth-child(even) td { background: #F8FAFC; }

/* ---- ACTIONS ---- */
.ct-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid #E8EDF5;
}
.ct-back-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #003580;
    color: #fff;
    padding: 9px 20px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 13.5px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    transition: background 0.2s;
}
.ct-back-btn:hover { background: #002252; color: #fff; }
.ct-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #fff;
    color: #64748B;
    border: 1px solid #E2E8F0;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 13.5px;
    font-weight: 500;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    transition: all 0.2s;
}
.ct-action-btn:hover { border-color: #003580; color: #003580; background: #EEF4FF; }

/* ---- RELATED LIST (NEW) ---- */
.ct-related-list-wrapper {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px dashed #ccc;
}
.ct-related-list-title {
    font-family: 'Inter', sans-serif;
    font-size: 16px;
    font-weight: 700;
    color: #111;
    text-transform: uppercase;
    margin-bottom: 16px;
}
.ct-related-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.ct-related-list-item {
    border-bottom: 1px solid #f0f0f0;
    padding: 16px 0;
}
.ct-related-list-item:last-child {
    border-bottom: none;
}
.ct-related-list-date {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: #a0a0a0;
    margin-bottom: 6px;
    font-family: 'Inter', sans-serif;
}
.ct-related-list-link {
    font-family: 'Inter', sans-serif;
    font-size: 15px;
    font-weight: 600;
    color: #333;
    text-decoration: none;
    line-height: 1.4;
    transition: color 0.2s;
    display: block;
}
.ct-related-list-link:hover {
    color: #003580;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 900px) {
    .ct-article { padding: 40px 30px; }
    .ct-academic-title { font-size: 28px; }
}
@media (max-width: 600px) {
    .ct-article { padding: 30px 20px; }
    .ct-academic-title { font-size: 24px; }
    .ct-academic-abstract { padding: 20px; }
    .ct-body { font-size: 16px; }
}

/* ---- PRINT ---- */
@media print {
    .main-header, footer, .ct-actions, .btn-connect, .ct-related-bottom { display: none !important; }
    .ct-main-wrap { background: #fff; padding: 0; }
    .ct-article { box-shadow: none; padding: 0; }
    .ct-hero { min-height: 180px; }
    .ct-body img { box-shadow: none; page-break-inside: avoid; }
}