/* =============================================
   BLOG-DETAIL.CSS — Trang Chi Tiết Bài Viết
============================================= */

/* ---- PAGE ---- */
.page-blog-detail { background: #fff; }

/* ---- HERO ---- */
.bd-hero {
    position: relative;
    min-height: 420px;
    background-image: url('../images/blog_banner.png');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: flex-end;
    padding-bottom: 0;
    overflow: hidden;
}
.bd-hero__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom,
        rgba(11,29,58,0.5) 0%,
        rgba(11,29,58,0.75) 60%,
        rgba(11,29,58,0.92) 100%);
}
.bd-hero .container { position: relative; z-index: 2; width: 100%; }
.bd-hero__inner {
    max-width: 820px;
    padding: 60px 0 52px;
}

/* Breadcrumb */
.bd-breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: rgba(255,255,255,0.65);
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.bd-breadcrumb a { color: rgba(255,255,255,0.8); transition: color 0.2s; }
.bd-breadcrumb a:hover { color: #d4af37; }
.bd-breadcrumb span { color: #d4af37; }
.bd-breadcrumb__sep { width: 13px; height: 13px; opacity: 0.5; }

/* Meta */
.bd-hero__meta {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}
.bd-hero__cat {
    background: #d4af37;
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    padding: 4px 12px;
    border-radius: 20px;
}
.bd-hero__dot { color: rgba(255,255,255,0.4); font-size: 12px; }
.bd-hero__date,
.bd-hero__read { font-size: 12.5px; color: rgba(255,255,255,0.7); }

/* Title */
.bd-hero__title {
    font-size: clamp(24px, 3.5vw, 40px);
    font-weight: 800;
    color: #fff;
    line-height: 1.3;
    margin-bottom: 28px;
    letter-spacing: 0.3px;
}

/* Author */
.bd-hero__author {
    display: flex;
    align-items: center;
    gap: 12px;
}
.bd-hero__avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid #d4af37;
    object-fit: cover;
}
.bd-hero__author-name {
    display: block;
    font-size: 13.5px;
    font-weight: 700;
    color: #fff;
}
.bd-hero__author-role {
    display: block;
    font-size: 11.5px;
    color: rgba(255,255,255,0.6);
}

/* ---- CONTENT LAYOUT ---- */
.bd-content-section {
    padding: 60px 0 90px;
    background: #fff;
}
.bd-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 50px;
    align-items: start;
}

/* ---- ARTICLE ---- */
.bd-article {}

/* Featured image */
.bd-featured-img {
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: 40px;
    box-shadow: 0 8px 32px rgba(11,29,58,0.1);
}
.bd-featured-img img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

/* Article body typography */
.bd-body { color: #334155; }
.bd-lead {
    font-size: 16.5px;
    line-height: 1.85;
    color: #1e293b;
    font-weight: 500;
    margin-bottom: 36px;
    padding-bottom: 36px;
    border-bottom: 1px solid #f1f5f9;
}
.bd-body h2 {
    font-size: 22px;
    font-weight: 800;
    color: #0b1d3a;
    margin: 40px 0 16px;
    padding-left: 14px;
    border-left: 4px solid #d4af37;
    line-height: 1.35;
}
.bd-body h3 {
    font-size: 17px;
    font-weight: 700;
    color: #0b1d3a;
    margin: 28px 0 12px;
}
.bd-body p {
    font-size: 15px;
    line-height: 1.85;
    color: #475569;
    margin-bottom: 18px;
}
.bd-body strong { color: #0b1d3a; }

/* Tip box */
.bd-tip-box {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    background: #fdfbf3;
    border: 1px solid #e8d97e;
    border-left: 4px solid #d4af37;
    border-radius: 10px;
    padding: 18px 20px;
    margin: 24px 0;
    font-size: 14px;
    color: #475569;
    line-height: 1.7;
}
.bd-tip-box__icon {
    color: #d4af37;
    flex-shrink: 0;
    margin-top: 1px;
}
.bd-tip-box__icon svg { width: 20px; height: 20px; }

/* Image grid */
.bd-image-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 28px 0;
}
.bd-image-grid__item {
    position: relative;
    display: block;
    border-radius: 12px;
    overflow: hidden;
    aspect-ratio: 4 / 3;
}
.bd-image-grid__item img {
    width: 100%; height: 100%;
    object-fit: cover; display: block;
    transition: transform 0.5s ease;
}
.bd-image-grid__item:hover img { transform: scale(1.05); }
.bd-image-grid__cap {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    background: linear-gradient(to top, rgba(11,29,58,0.8) 0%, transparent 100%);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 20px 12px 10px;
}

/* Blockquote */
.bd-quote {
    border-left: 4px solid #d4af37;
    background: #f8fafc;
    border-radius: 0 12px 12px 0;
    padding: 24px 28px;
    margin: 32px 0;
}
.bd-quote p {
    font-size: 16px;
    font-style: italic;
    color: #0b1d3a;
    font-weight: 600;
    margin-bottom: 10px;
    line-height: 1.7;
}
.bd-quote footer {
    font-size: 13px;
    color: #94a3b8;
    font-style: normal;
}

/* Lists */
.bd-list {
    list-style: none;
    padding: 0;
    margin: 0 0 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.bd-list li {
    font-size: 15px;
    color: #475569;
    line-height: 1.7;
    padding-left: 20px;
    position: relative;
}
.bd-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #d4af37;
    font-weight: 800;
    font-size: 16px;
    line-height: 1.6;
}
.bd-ordered-list {
    padding-left: 20px;
    margin: 0 0 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.bd-ordered-list li {
    font-size: 15px;
    color: #475569;
    line-height: 1.7;
    padding-left: 6px;
}
.bd-ordered-list li::marker { color: #d4af37; font-weight: 700; }

/* Info cards */
.bd-info-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin: 24px 0 32px;
}
.bd-info-card {
    background: #f8fafc;
    border: 1px solid #e8edf4;
    border-radius: 14px;
    padding: 22px 18px;
    text-align: center;
    transition: box-shadow 0.3s, transform 0.3s;
}
.bd-info-card:hover {
    box-shadow: 0 8px 28px rgba(11,29,58,0.1);
    /* transform: translateY(-3px); */
}
.bd-info-card__icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: #fff;
    border: 1px solid #e2e8f0;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 14px;
    color: #d4af37;
}
.bd-info-card__icon svg { width: 22px; height: 22px; }
.bd-info-card h4 {
    font-size: 14px;
    font-weight: 700;
    color: #0b1d3a;
    margin-bottom: 8px;
}
.bd-info-card p {
    font-size: 12.5px;
    color: #64748b;
    line-height: 1.65;
    margin: 0;
}

/* Tags */
.bd-tags {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin: 36px 0 24px;
    padding-top: 28px;
    border-top: 1px solid #f1f5f9;
}
.bd-tags__label {
    font-size: 13px;
    font-weight: 600;
    color: #64748b;
}
.bd-tag {
    padding: 5px 14px;
    background: #f1f5f9;
    border-radius: 20px;
    font-size: 12.5px;
    color: #475569;
    font-weight: 500;
    transition: all 0.2s;
}
.bd-tag:hover {
    background: #0b1d3a;
    color: #fff;
}

/* Share */
.bd-share {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 36px;
}
.bd-share__label {
    font-size: 13px;
    font-weight: 600;
    color: #64748b;
}
.bd-share-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #f1f5f9;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, transform 0.2s;
    overflow: hidden;
}
.bd-share-btn:hover { background: #e2e8f0; transform: scale(1.1); }
.bd-share-btn img { width: 20px; height: 20px; object-fit: contain; }

/* Author box */
.bd-author-box {
    display: flex;
    gap: 18px;
    align-items: flex-start;
    background: #f8fafc;
    border: 1px solid #e8edf4;
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 40px;
}
.bd-author-box__avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    object-fit: contain;
    border: 2px solid #d4af37;
    background: #0b1d3a;
    padding: 4px;
    flex-shrink: 0;
}
.bd-author-box__name {
    font-size: 15px;
    font-weight: 700;
    color: #0b1d3a;
    margin-bottom: 6px;
}
.bd-author-box__bio {
    font-size: 13.5px;
    color: #64748b;
    line-height: 1.7;
    margin: 0;
}

/* Post navigation */
.bd-post-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 50px;
    padding: 28px 0;
    border-top: 1px solid #f1f5f9;
    border-bottom: 1px solid #f1f5f9;
}
.bd-post-nav__item {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 16px 18px;
    border: 1px solid #e8edf4;
    border-radius: 12px;
    text-decoration: none;
    transition: all 0.25s;
    background: #fff;
}
.bd-post-nav__item:hover {
    border-color: #d4af37;
    box-shadow: 0 4px 16px rgba(11,29,58,0.08);
}
.bd-post-nav__item--next { text-align: right; }
.bd-post-nav__dir {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    font-weight: 700;
    color: #d4af37;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.bd-post-nav__item--next .bd-post-nav__dir { justify-content: flex-end; }
.bd-post-nav__icon { width: 14px; height: 14px; }
.bd-post-nav__title {
    font-size: 13.5px;
    font-weight: 600;
    color: #0b1d3a;
    line-height: 1.4;
}
.bd-post-nav__item:hover .bd-post-nav__title { color: #d4af37; }

/* Related posts */
.bd-related { margin-top: 10px; }
.bd-related__title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 800;
    color: #0b1d3a;
    text-transform: uppercase;
    margin-bottom: 28px;
}
.bd-related__bar {
    display: inline-block;
    width: 4px;
    height: 20px;
    background: #d4af37;
    border-radius: 2px;
    flex-shrink: 0;
}
.bd-related__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}

/* Sidebar CTA */
.sidebar-cta {
    border-radius: 16px;
    overflow: hidden;
    background: linear-gradient(135deg, #0b1d3a 0%, #1a3356 100%);
    position: relative;
}
.sidebar-cta::before {
    content: '';
    position: absolute;
    top: -40px; right: -40px;
    width: 120px; height: 120px;
    border-radius: 50%;
    background: rgba(212,175,55,0.12);
}
.sidebar-cta__body { padding: 28px 24px; position: relative; z-index: 1; }
.sidebar-cta__title {
    font-size: 17px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 10px;
}
.sidebar-cta__desc {
    font-size: 13px;
    color: rgba(255,255,255,0.75);
    line-height: 1.7;
    margin-bottom: 20px;
}
.sidebar-cta__btn {
    display: inline-block;
    padding: 11px 24px;
    background: #d4af37;
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    border-radius: 6px;
    text-decoration: none;
    transition: background 0.25s;
    letter-spacing: 0.3px;
}
.sidebar-cta__btn:hover { background: #f2c85b; color: #0b1d3a; }

/* ---- RESPONSIVE ---- */
@media (max-width: 1024px) {
    .bd-layout { grid-template-columns: 1fr 260px; gap: 36px; }
    .bd-info-cards { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    .bd-layout { grid-template-columns: 1fr; }
    .bd-hero { min-height: 360px; }
    .bd-hero__title { font-size: 24px; }
    .bd-hero__inner { padding: 50px 0 40px; }
    .bd-image-grid { grid-template-columns: 1fr; }
    .bd-info-cards { grid-template-columns: 1fr; }
    .bd-related__grid { grid-template-columns: 1fr; }
    .bd-post-nav { grid-template-columns: 1fr; }
    .bd-post-nav__item--next { text-align: left; }
    .bd-post-nav__item--next .bd-post-nav__dir { justify-content: flex-start; }
    .bd-content-section { padding: 44px 0 70px; }
}
@media (max-width: 480px) {
    .bd-hero__title { font-size: 20px; }
    .bd-body h2 { font-size: 18px; }
    .bd-body h3 { font-size: 15px; }
    .bd-author-box { flex-direction: column; }
}