/* Bổ sung riêng cho trang Ưu đãi (nạp sau style.css) */
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.logo a{display:block;width:100%;height:100%}
.page-head{padding:28px 24px 10px}
.crumb{font-size:14px;color:#666;margin-bottom:10px}
.crumb a{color:var(--accent)}
.crumb a:hover{text-decoration:underline}
.page-head h1{font-size:34px;font-weight:900;margin-bottom:16px}

/* Khung đếm ngược */
.promo{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:20px;padding:18px 22px;border-radius:14px;background:linear-gradient(135deg,#c0281c,#e8501f);color:#fff}
.promo h2{font-size:20px;font-weight:900}
.promo p{font-size:14px;margin-top:2px}
.timer{display:flex;align-items:center;gap:8px}
.timer b{display:grid;place-items:center;min-width:48px;height:48px;border-radius:8px;background:rgba(0,0,0,.35);font-size:22px;font-weight:700;font-variant-numeric:tabular-nums}
.timer span{font-size:20px;font-weight:900}

/* Thanh lọc và sắp xếp */
.toolbar{display:flex;gap:14px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.chips{display:flex;gap:10px;flex-wrap:wrap}
.chip{padding:9px 18px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--ink);font:inherit;font-weight:500;font-size:14px;cursor:pointer}
.chip:hover{background:#eee}
.chip.on{background:#c0281c;color:#fff;border-color:#c0281c}
.chip:focus-visible,.tools select:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.tools{display:flex;gap:12px;align-items:center;font-size:14px;color:#555}
.tools select{padding:9px 12px;border:1px solid var(--line);border-radius:8px;font:inherit;background:#fff;color:var(--ink)}

.sec[hidden]{display:none}
.sec-sub{color:#666;font-size:14px;text-align:right;max-width:55%}
.row .card:nth-child(n+6){border-top:1px solid var(--line)}
@media(max-width:760px){
  .sec-head{flex-direction:column;gap:2px}
  .sec-sub{text-align:left;max-width:100%;padding:0 24px 8px}
  .page-head{padding:20px 14px 8px}
  .timer b{min-width:42px;height:42px;font-size:18px}
}