/* ==========================================================================
   BLOG — archive (category/tag/date/home) + single post. Nạp riêng ở trang blog.
   MOBILE-FIRST, breakpoint ≥860px. Self-contained (không phụ thuộc home.css).
   ========================================================================== */

/* .crumb-wrap base nằm ở catalog/product css (không nạp ở đây) → khai báo lại */
.crumb-wrap { max-width: var(--container-max); margin: 0 auto; padding: 12px 14px 0; }

/* ---- ĐẦU TRANG ARCHIVE -------------------------------------------------- */
.blog-head { max-width: var(--container-max); margin: 0 auto; padding: 14px 14px 4px; }
.blog-head h1 { font-size: var(--text-xl); color: var(--text-primary); line-height: 1.2; }
.blog-head p { color: var(--text-secondary); font-size: 13px; line-height: 1.6; margin-top: 8px; max-width: 640px; text-transform: none; }
.blog-head__count { display: inline-flex; align-items: center; gap: 6px; margin-top: 12px; font-size: 12px; font-weight: 700; color: var(--color-primary); background: var(--surface-primary-subtle); border: 1px solid var(--blue-200); padding: 5px 12px; border-radius: var(--radius-full); }

/* ---- CHIP DANH MỤC ------------------------------------------------------ */
.blog-cats { max-width: var(--container-max); margin: 14px auto 0; padding: 0 14px; }
.blog-cats__row { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 4px; scrollbar-width: none; }
.blog-cats__row::-webkit-scrollbar { display: none; }
.blog-cats a { flex: none; display: inline-flex; align-items: center; height: 36px; padding: 0 15px; border-radius: var(--radius-full); border: 1px solid var(--border-default); background: var(--surface-card); color: var(--text-secondary); font-family: var(--font-display); font-weight: 600; font-size: 12.5px; white-space: nowrap; }
.blog-cats a:hover { border-color: var(--blue-200); color: var(--color-primary); }
.blog-cats a.is-active { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }

/* ---- META dùng chung (ngày · thời gian đọc) ---------------------------- */
.blog-meta { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; font-size: 12px; color: var(--text-tertiary); }
.blog-meta span { display: inline-flex; align-items: center; gap: 6px; }

/* ---- BÀI NỔI BẬT (featured) -------------------------------------------- */
.blog-feature { max-width: var(--container-max); margin: 16px auto 0; padding: 0 14px; }
.blog-feature__card { display: flex; flex-direction: column; background: var(--surface-card); border: 1px solid var(--border-default); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); color: inherit; transition: box-shadow .18s ease; }
.blog-feature__card:hover { box-shadow: var(--shadow-md); }
.blog-feature__media { position: relative; aspect-ratio: 16/9; background: repeating-linear-gradient(45deg, var(--gray-100) 0 12px, var(--gray-50) 12px 24px); display: flex; align-items: center; justify-content: center; color: var(--gray-400); font-size: 26px; }
.blog-feature__media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.blog-feature__flag { position: absolute; top: 14px; left: 14px; z-index: 1; background: var(--color-accent); color: #fff; font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .04em; padding: 4px 10px; border-radius: var(--radius-full); box-shadow: var(--shadow-sm); }
.blog-feature__body { padding: 16px; display: flex; flex-direction: column; justify-content: center; }
.blog-feature__cat { font-size: 11.5px; color: var(--color-primary); font-weight: 700; text-transform: uppercase; letter-spacing: .04em; }
.blog-feature__title { font-size: var(--text-lg); color: var(--text-primary); margin-top: 8px; line-height: 1.3; text-transform: none; }
.blog-feature__card:hover .blog-feature__title { color: var(--color-primary); }
.blog-feature__excerpt { font-size: 13.5px; color: var(--text-secondary); text-transform: none; line-height: 1.65; margin-top: 10px; }
.blog-feature__meta { margin-top: 16px; }

/* ---- LƯỚI BÀI VIẾT ----------------------------------------------------- */
.blog-grid-wrap { max-width: var(--container-max); margin: 0 auto; padding: 20px 14px 8px; }
.blog-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.blog-card { display: flex; flex-direction: column; background: var(--surface-card); border: 1px solid var(--border-default); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-xs); color: inherit; transition: transform .18s ease, box-shadow .18s ease; }
.blog-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.blog-card__media { position: relative; aspect-ratio: 16/10; background: repeating-linear-gradient(45deg, var(--gray-100) 0 10px, var(--gray-50) 10px 20px); display: flex; align-items: center; justify-content: center; color: var(--gray-400); font-size: 24px; }
.blog-card__media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.blog-card__cat { position: absolute; top: 10px; left: 10px; z-index: 1; background: var(--surface-card); color: var(--color-primary); font-size: 10.5px; font-weight: 700; text-transform: uppercase; letter-spacing: .03em; padding: 3px 9px; border-radius: var(--radius-full); border: 1px solid var(--blue-200); }
.blog-card__body { padding: 15px 15px 14px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.blog-card__title { font-size: 15px; color: var(--text-primary); line-height: 1.35; text-transform: none; font-weight: 700; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.blog-card:hover .blog-card__title { color: var(--color-primary); }
.blog-card__excerpt { font-size: 13px; color: var(--text-secondary); text-transform: none; line-height: 1.55; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.blog-card__meta { margin-top: auto; padding-top: 8px; font-size: 11.5px; }

.blog-empty { max-width: var(--container-max); margin: 0 auto; padding: 20px 14px; color: var(--text-secondary); }

/* ==========================================================================
   SINGLE POST — layout theo single-du_an (hero ảnh nền + 2 cột + sidebar)
   ========================================================================== */

/* Hero */
.bp-hero { position: relative; min-height: 320px; display: flex; align-items: flex-end; overflow: hidden; background: linear-gradient(150deg, var(--gray-900) 0%, var(--blue-900) 100%); }
.bp-hero__img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.bp-hero__scrim { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(8,16,32,.2) 0%, rgba(8,16,32,.42) 45%, rgba(8,16,32,.88) 100%); }
.bp-hero__inner { position: relative; width: 100%; max-width: var(--container-max); margin: 0 auto; padding: 24px 14px 22px; }
.bp-hero__badge { display: inline-flex; align-items: center; gap: 7px; background: var(--color-accent); color: #fff; font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .05em; padding: 6px 13px; border-radius: var(--radius-full); }
.bp-hero h1 { color: #fff; font-size: 26px; line-height: 1.25; margin-top: 14px; text-transform: none; text-shadow: 0 2px 20px rgba(0,0,0,.6); }
.bp-hero__facts { display: flex; flex-wrap: wrap; gap: 8px 16px; margin-top: 14px; }
.bp-hero__fact { display: inline-flex; align-items: center; gap: 7px; color: rgba(255,255,255,.92); font-size: 12.5px; text-shadow: 0 1px 10px rgba(0,0,0,.5); }
.bp-hero__fact i { color: #fff; opacity: .85; font-size: 12px; }

/* Bố cục nội dung */
.bp-shell { max-width: var(--container-max); margin: 0 auto; padding: 22px 14px 8px; }
.bp-layout { display: flex; flex-direction: column; gap: 22px; }
.bp-main { min-width: 0; }
.bp-lead { font-size: 15px; color: var(--text-primary); text-transform: none; line-height: 1.75; font-weight: 500; padding-left: 14px; border-left: 3px solid var(--color-accent); }
.bp-body { margin-top: 18px; }

/* Sidebar — thẻ thông tin */
.bp-aside { min-width: 0; }
.bp-info { background: var(--surface-card); border: 1px solid var(--border-default); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); overflow: hidden; }
.bp-info__head { background: linear-gradient(120deg, var(--gray-900) 0%, var(--blue-900) 100%); color: #fff; font-family: var(--font-display); font-weight: 800; font-size: 14px; text-transform: uppercase; letter-spacing: .03em; padding: 13px 16px; }
.bp-info__rows { padding: 6px 16px 8px; }
.bp-info__row { display: flex; flex-direction: column; gap: 2px; padding: 11px 0; border-bottom: 1px solid var(--border-default); }
.bp-info__row:last-child { border-bottom: none; }
.bp-info__label { font-size: 11px; text-transform: uppercase; letter-spacing: .04em; color: var(--text-tertiary); font-weight: 600; }
.bp-info__value { font-size: 13.5px; color: var(--text-primary); font-weight: 600; line-height: 1.4; }
.bp-info__value a { color: var(--color-primary); }
.bp-info__share { display: flex; flex-direction: column; gap: 9px; padding: 13px 16px; border-top: 1px solid var(--border-default); }
.bp-info__actions { padding: 0 16px 16px; }

/* Bình luận — cột hẹp căn giữa */
.bp { max-width: 820px; margin: 0 auto; padding: 0 14px; }

/* inline CTA trong bài */
.bp-cta { position: relative; overflow: hidden; margin-top: 26px; border-radius: var(--radius-lg); background: linear-gradient(120deg, var(--gray-900) 0%, var(--blue-900) 100%); }
.bp-cta__inner { position: relative; padding: 20px 22px; display: flex; flex-direction: column; gap: 14px; align-items: flex-start; }
.bp-cta__t { color: #fff; }
.bp-cta__t b { display: block; font-size: var(--text-base); }
.bp-cta__t span { display: block; font-size: 13px; color: rgba(255,255,255,.8); margin-top: 4px; text-transform: none; line-height: 1.5; }

/* tags + share */
.bp-foot { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--border-default); flex-wrap: wrap; }
.bp-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.bp-tags a { padding: 6px 12px; background: var(--surface-sunken); border: 1px solid var(--border-default); border-radius: var(--radius-full); font-size: 12px; color: var(--text-secondary); }
.bp-tags a:hover { color: var(--color-primary); border-color: var(--blue-200); }
.bp-share { display: flex; gap: 8px; }
.bp-share a { width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--border-default); display: flex; align-items: center; justify-content: center; color: var(--text-secondary); }
.bp-share a:hover { color: var(--color-primary); border-color: var(--blue-200); }

/* related */
.bp-related { background: var(--surface-sunken); margin-top: 32px; padding: 28px 0 10px; }
.bp-related__inner { max-width: var(--container-max); margin: 0 auto; padding: 0 14px; }
.bp-related__inner > h2 { font-size: var(--text-lg); color: var(--text-primary); margin-bottom: 16px; }

/* =========================================================================
   DESKTOP ≥860px
   ========================================================================= */
@media (min-width: 860px) {
  .crumb-wrap { padding: 18px 32px 0; }

  .blog-head { padding: 28px 32px 4px; }
  .blog-head h1 { font-size: var(--text-3xl); }
  .blog-head p { font-size: var(--text-base); }
  .blog-cats { padding: 0 32px; }

  .blog-feature { padding: 0 32px; margin-top: 20px; }
  .blog-feature__card { flex-direction: row; }
  .blog-feature__media { flex: 1 1 50%; aspect-ratio: auto; min-height: 300px; }
  .blog-feature__body { flex: 1 1 50%; padding: 34px 36px; }
  .blog-feature__title { font-size: var(--text-2xl); }
  .blog-feature__excerpt { font-size: var(--text-base); }

  .blog-grid-wrap { padding: 32px 32px 8px; }
  .blog-grid { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }

  .bp-hero { min-height: 420px; }
  .bp-hero__inner { padding: 40px 32px 40px; }
  .bp-hero h1 { font-size: 40px; max-width: 860px; }
  .bp-hero__facts { gap: 10px 24px; margin-top: 18px; }
  .bp-hero__fact { font-size: 14px; }

  .bp-shell { padding: 40px 32px 8px; }
  .bp-layout { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 40px; align-items: start; }
  .bp-aside { position: sticky; top: 96px; }
  .bp-lead { font-size: var(--text-lg); }
  .bp { padding: 0 32px; }

  .bp-cta__inner { flex-direction: row; align-items: center; justify-content: space-between; padding: 24px 28px; gap: 22px; }
  .bp-cta__t { flex: 1; }

  .bp-related { padding: 48px 0 14px; }
  .bp-related__inner { padding: 0 32px; }
  .bp-related .blog-grid { grid-template-columns: repeat(3, 1fr); }
}