/*
 * Trang blog (templates/blog.bwt, snippets/article-card.bwt), mockup "Trang khuyến mãi".
 * Mobile: thẻ xếp 1 cột. Máy tính bảng: 2 cột. Desktop (64em): 3 cột, thẻ đầu chiếm 2×2;
 * "Đã kết thúc gần đây" 4 cột.
 */

.tpl-blog main { background: var(--color-surface-alt); }
.blog { padding-bottom: var(--space-7); display: flex; flex-direction: column; gap: var(--space-4); }
.blog-head { padding: 0 var(--space-4); }
.blog-head h1 { margin: 0; font-size: 1.375rem; line-height: var(--leading-tight); }
.blog-head p { margin: 4px 0 0; color: var(--color-text-muted); }

/* ---------- Tab trạng thái, chủ đề ---------- */

.promo-bar { padding-bottom: var(--space-3); background: var(--color-surface); display: flex; flex-direction: column; gap: var(--space-3); }
.promo-tabs { display: flex; border-bottom: 1px solid var(--color-border); }
.promo-tabs button {
  flex: 1;
  min-height: var(--tap-min);
  border: 0;
  border-bottom: 2px solid transparent;
  background: none;
  color: var(--color-text-muted);
  font: inherit;
  font-weight: var(--weight-strong);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: var(--text-sm);
  white-space: nowrap;
  cursor: pointer;
}
.promo-tabs button[aria-selected="true"] { color: var(--color-action-hover); border-bottom-color: var(--color-action); }
.promo-n { padding: 0 6px; border-radius: var(--radius-full); background: var(--red-50); font-size: var(--text-xs); }
.promo-topics { padding: 0 var(--space-4); display: flex; gap: var(--space-2); overflow-x: auto; scrollbar-width: none; }
.promo-topics::-webkit-scrollbar { display: none; }
.promo-chip {
  flex: none;
  min-height: 36px;
  padding: 0 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-surface);
  color: var(--color-text);
  font: inherit;
  font-size: var(--text-sm);
  font-weight: var(--weight-strong);
  cursor: pointer;
}
.promo-chip[aria-pressed="true"] { background: var(--color-inverse); border-color: var(--color-inverse); color: var(--color-on-inverse); }

/* ---------- Lưới thẻ ---------- */

.promo-sec { padding: 0 var(--space-4); display: flex; flex-direction: column; gap: var(--space-3); }
.promo-sec[hidden] { display: none; }
.promo-off-h { margin: var(--space-2) 0 0; font-size: var(--text-base); color: var(--color-text-muted); }
.promo-grid, .blog-grid { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-3); }
.blog-grid { padding: 0 var(--space-4); }
.acard[hidden] { display: none; }
.acard a {
  height: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.acard a:hover { border-color: var(--color-action); color: var(--color-text); }
.acard a:hover .acard-title { color: var(--color-action-hover); }
.acard.is-off a { opacity: .72; }
.acard-img { aspect-ratio: 16 / 9; background: var(--color-surface-sunken); color: var(--color-text-subtle); display: grid; place-items: center; }
.acard-img img { width: 100%; height: 100%; object-fit: cover; }
.acard-img .icon { width: 32px; height: 32px; }
.acard-body { padding: 10px var(--space-3) var(--space-3); display: flex; flex-direction: column; gap: 6px; }
.acard-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.acard-st, .acard-topic { padding: 0 6px; border-radius: var(--radius-sm); font-size: 11px; font-weight: var(--weight-strong); line-height: 20px; background: var(--color-surface-sunken); color: var(--color-text-muted); }
.acard-st.is-on { background: var(--color-success-bg); color: var(--color-success); }
.acard-topic { background: var(--red-50); color: var(--color-action-hover); }
.acard-title { font-size: var(--text-base); line-height: var(--leading-tight); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.acard-sum { font-size: var(--text-sm); color: var(--color-text-muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.acard-date { font-size: var(--text-xs); color: var(--color-text-muted); display: flex; align-items: center; gap: 6px; }
.acard-date .icon { width: 14px; height: 14px; }

/* Đã kết thúc trên điện thoại: dòng gọn, ảnh nhỏ bên trái */
.promo-grid.is-off .acard a { flex-direction: row; align-items: flex-start; }
.promo-grid.is-off .acard-img { width: 120px; flex: none; }
.promo-grid.is-off .acard-body { padding: var(--space-2) var(--space-3); min-width: 0; }
.promo-grid.is-off .acard-title { font-size: var(--text-sm); }

.blog-more { align-self: center; }

.promo-empty {
  margin: 0;
  padding: var(--space-5);
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}
.blog > .promo-empty { margin: 0 var(--space-4); }
.promo-empty[hidden] { display: none; }
.promo-empty > .icon { width: 36px; height: 36px; color: var(--color-text-subtle); }
.promo-empty h2 { margin: 0; font-size: var(--text-base); }
.promo-empty p { margin: 0; font-size: var(--text-sm); color: var(--color-text-muted); }
.promo-empty-actions { width: 100%; max-width: 360px; margin-top: var(--space-2); display: grid; gap: var(--space-2); }


@media (min-width: 40em) {
  .promo-grid, .blog-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .promo-empty-actions { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 64em) {
  .blog { max-width: var(--page-max); margin: 0 auto; padding: 0 var(--page-gutter) var(--space-7); }
  .blog .crumbs { padding-left: 0; padding-right: 0; }
  .blog-head { padding: 0; display: flex; align-items: baseline; gap: var(--space-4); }
  .blog-head h1 { font-size: 1.75rem; }
  .blog-head p { margin: 0; }
  .promo-bar { border-radius: var(--radius-md); }
  .promo-tabs { max-width: 480px; }
  .promo-sec, .blog-grid { padding: 0; }
  .blog > .promo-empty { margin: 0; }
  .promo-grid.is-on, .blog-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-4); }
  .promo-grid.is-on > .is-lead, .blog-grid > .is-big { grid-column: span 2; grid-row: span 2; }
  .promo-grid.is-on > .is-lead .acard-title, .blog-grid > .is-big .acard-title { font-size: var(--text-xl); }
  .promo-tabs button { font-size: var(--text-base); }
  .promo-grid.is-on > .is-lead .acard-img { flex: 1; aspect-ratio: auto; min-height: 0; }
  .promo-grid.is-off { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-4); }
  .promo-grid.is-off .acard a { flex-direction: column; }
  .promo-grid.is-off .acard-img { width: auto; }
  .promo-grid.is-off .acard-body { padding: 10px var(--space-3) var(--space-3); }
  .promo-grid.is-off .acard-title { font-size: var(--text-base); }
  .promo-grid.is-off.is-full { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* ---------- Trang khuyến mãi: lưới so le kiểu Pinterest (anh huy 02/11) ----------
 * Ảnh tràn cả thẻ, giữ tỉ lệ gốc của ảnh nên các thẻ cao thấp khác nhau. Xếp theo hàng ngang (trái sang phải):
 * lưới hàng 4px, assets/blog.js đo chiều cao từng thẻ rồi đặt số hàng thẻ chiếm (grid-row-end: span n).
 * Không có JS: thẻ vẫn xếp theo hàng, chỉ không khít.
 * Máy có chuột: thông tin ẩn, trượt lên khi rê chuột hoặc khi focus bằng bàn phím.
 * Màn hình cảm ứng: thông tin luôn hiện ở đáy ảnh trên nền mờ tối.
 */
.blog.is-promo .promo-grid,
.blog.is-promo .promo-grid.is-on,
.blog.is-promo .promo-grid.is-off {
  --mz-gap: var(--space-3);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-auto-rows: 4px;
  gap: 0 var(--mz-gap);
  align-items: start;
}
.blog.is-promo .promo-grid:not(.is-mz) { row-gap: var(--mz-gap); grid-auto-rows: auto; }
.blog.is-promo .acard { margin: 0; padding-bottom: var(--mz-gap); grid-column: auto; grid-row: auto; }
.blog.is-promo .promo-grid:not(.is-mz) .acard { padding-bottom: 0; }
.blog.is-promo .acard a,
.blog.is-promo .promo-grid.is-off .acard a {
  position: relative;
  display: block;
  height: auto;
  border: 0;
  border-radius: var(--radius-md);
  background: var(--gray-900);
  overflow: hidden;
  isolation: isolate;
}
.blog.is-promo .acard-img,
.blog.is-promo .promo-grid.is-off .acard-img,
.blog.is-promo .promo-grid.is-on > .is-lead .acard-img { display: block; width: auto; aspect-ratio: auto; min-height: 0; background: var(--gray-800); }
.blog.is-promo .acard-img img { display: block; width: 100%; height: auto; min-height: 200px; object-fit: cover; transition: transform .4s ease; }
.blog.is-promo .acard-img .icon { display: block; width: 40px; height: 40px; margin: 64px auto 120px; color: var(--gray-500); }
.blog.is-promo .acard a:hover .acard-img img,
.blog.is-promo .acard a:focus-visible .acard-img img { transform: scale(1.04); }
.blog.is-promo .acard.is-off .acard-img img { filter: grayscale(1); }
.blog.is-promo .acard.is-off a { opacity: 1; }

.blog.is-promo .acard-body,
.blog.is-promo .promo-grid.is-off .acard-body {
  position: absolute;
  inset: 0;
  justify-content: flex-end;
  padding: var(--space-3);
  background: linear-gradient(to top, rgb(18 21 31 / .92) 0%, rgb(18 21 31 / .55) 35%, rgb(18 21 31 / 0) 65%);
  color: var(--gray-0);
  transition: transform .3s ease, opacity .3s ease;
}
.blog.is-promo .acard-title,
.blog.is-promo .promo-grid.is-off .acard-title,
.blog.is-promo .promo-grid.is-on > .is-lead .acard-title { color: var(--gray-0); font-size: var(--text-sm); -webkit-line-clamp: 3; }
.blog.is-promo .acard a:hover .acard-title { color: var(--gray-0); }
.blog.is-promo .acard-date { color: var(--gray-200); }
.blog.is-promo .acard-st { background: rgb(255 255 255 / .16); color: var(--gray-0); }
.blog.is-promo .acard-st.is-on { background: var(--green-700); color: var(--gray-0); }
.blog.is-promo .acard-topic { background: var(--color-action); color: var(--gray-0); }

@media (hover: hover) {
  /* Nền mờ và chữ ẩn; nhãn trạng thái, chủ đề luôn nằm góc trên ảnh */
  .blog.is-promo .acard-body { z-index: 1; background: none; }
  .blog.is-promo .acard-body::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background: linear-gradient(to top, rgb(18 21 31 / .92) 0%, rgb(18 21 31 / .55) 40%, rgb(18 21 31 / 0) 75%);
    opacity: 0;
    transition: opacity .3s ease;
  }
  .blog.is-promo .acard-title,
  .blog.is-promo .acard-date { transform: translateY(16px); opacity: 0; transition: transform .3s ease, opacity .3s ease; }
  .blog.is-promo .acard-tags { position: absolute; top: var(--space-3); left: var(--space-3); right: var(--space-3); }
  .blog.is-promo .acard a:hover .acard-body::before,
  .blog.is-promo .acard a:focus-visible .acard-body::before { opacity: 1; }
  .blog.is-promo .acard a:hover .acard-title,
  .blog.is-promo .acard a:hover .acard-date,
  .blog.is-promo .acard a:focus-visible .acard-title,
  .blog.is-promo .acard a:focus-visible .acard-date { transform: none; opacity: 1; }
}

@media (min-width: 40em) {
  .blog.is-promo .promo-grid,
  .blog.is-promo .promo-grid.is-on,
  .blog.is-promo .promo-grid.is-off { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (min-width: 64em) {
  .blog.is-promo .promo-grid,
  .blog.is-promo .promo-grid.is-on,
  .blog.is-promo .promo-grid.is-off { grid-template-columns: repeat(4, minmax(0, 1fr)); --mz-gap: var(--space-4); }
  .blog.is-promo .acard-title { font-size: var(--text-base); }
}