/* Trang danh mục (/qua-tet/, /yen-tinh-che/, ...): dùng chung token và header/footer của kien-thuc/kt.css. */
.dm { padding-block: 32px 56px; }
.dm .crumb { font-size: 13px; color: var(--muted); margin: 0 0 14px; }
.dm .crumb a { color: var(--emerald-2); }
.dm h1 { font-size: clamp(34px, 6vw, 52px); color: var(--emerald-2); margin-block: 6px 12px; }
.dm .lede { max-width: 72ch; color: var(--muted); font-size: 16px; }
.dm .lede p { margin: 0 0 10px; }
.dm .facts { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 8px; padding: 0; }
.dm .facts span { background: var(--paper); border: 1px solid var(--line); border-radius: 999px; padding: 6px 12px; font-size: 13px; color: var(--ink); }
.dm h2 { font-size: 30px; margin: 36px 0 14px; color: var(--ink); }
.dm h2.grp small { font: 500 13px var(--font-body); color: var(--muted); margin-left: 6px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 16px; }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; display: grid; grid-template-rows: auto 1fr; min-width: 0; }
.card img { width: 100%; aspect-ratio: 1; object-fit: cover; display: block; background: #fff; }
.card .body { padding: 12px 14px 14px; display: grid; gap: 6px; align-content: start; }
.card h3 { font: 600 15px/1.35 var(--font-body); }
.card .spec { margin: 0; font-size: 12.5px; color: var(--muted); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card .price { margin: 0; }
.card .price b { color: var(--emerald-2); font-size: 16px; }
.card .price s { color: var(--muted); font-size: 13px; }
.card .btn { justify-content: center; padding: 9px 14px; margin-top: 4px; }
.guide, .faq { max-width: 760px; }
.guide p, .guide li { max-width: 68ch; }
.guide ul, .guide ol { padding-left: 22px; display: grid; gap: 6px; }
.faq details { background: var(--paper); border: 1px solid var(--line); border-radius: 10px; padding: 12px 16px; margin-bottom: 10px; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq details p { margin: 10px 0 0; color: var(--muted); }
.dm .cta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.dm .also { margin-top: 24px; font-size: 14px; color: var(--muted); }
.dm .also a { color: var(--emerald-2); }
@media (max-width: 480px) { .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; } .card h3 { font-size: 14px; } }
.card h3 a { text-decoration: none; }
.card h3 a:hover { text-decoration: underline; }
/* Trang sản phẩm */
.sp-top { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px; align-items: start; margin-bottom: 8px; }
.gallery #main-img { width: 100%; height: auto; aspect-ratio: 1; object-fit: cover; border-radius: 14px; border: 1px solid var(--line); background: #fff; display: block; }
.thumbs { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.thumbs button { padding: 0; border: 2px solid transparent; border-radius: 8px; background: none; cursor: pointer; overflow: hidden; width: 72px; height: 72px; }
.thumbs button[aria-pressed="true"] { border-color: var(--gold); }
.thumbs img { width: 100%; height: 100%; object-fit: cover; display: block; }
.sp .info h1 { font-size: clamp(30px, 4.5vw, 44px); }
.sp .info .spec { color: var(--muted); margin: 0 0 8px; }
.sp .info .price b { font-size: 28px; color: var(--emerald-2); }
.sp .points { padding-left: 20px; display: grid; gap: 6px; margin: 16px 0; }
.sp .buy { display: flex; flex-wrap: wrap; gap: 10px; }
.sp .ship { font-size: 13px; color: var(--muted); margin-top: 12px; }
.sp .ship a { color: var(--emerald-2); }
@media (max-width: 760px) { .sp-top { grid-template-columns: 1fr; gap: 18px; } }