/* ==== main-block overrides vs base.css (from san-pham-chi-tiet.html) ==== */
.group-contact a{background:var(--ink2);border:1px solid var(--line2);box-shadow:0 8px 20px rgba(44,46,47,.16)}

/* ==== shared block f77d7575 (from san-pham-chi-tiet.html) ==== */
  /* ===== product detail page ===== */
  .plp-page .hdr{background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
  .plp-page .hdr:not(.scrolled) .nav-link,.plp-page .hdr:not(.scrolled) .tools button{color:var(--ink)}
  .plp-page .hdr:not(.scrolled) .nav-link::after{background:var(--ink)}
  .plp-page .hdr:not(.scrolled) .brand img{filter:none}
  .pdp{padding-top:calc(var(--anno-h) + 78px + 40px);padding-bottom:30px}
  .pdp .crumb{font-size:11.5px;letter-spacing:.04em;color:var(--muted);margin-bottom:26px}
  .pdp .crumb a{color:var(--muted)}.pdp .crumb a:hover{color:var(--ink)}
  .pdp-wrap{display:grid;grid-template-columns:1.12fr 1fr;gap:clamp(28px,4vw,72px);align-items:start}
  .pdp-main{aspect-ratio:1/1;background:var(--paper);overflow:hidden;border-radius:5px}
  .pdp-main img{width:100%;height:100%;object-fit:cover;display:block}
  .pdp-thumbs{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
  .pdp-thumb{width:80px;aspect-ratio:1;border-radius:5px;overflow:hidden;cursor:pointer;padding:0;background:var(--greige);border:1px solid transparent;opacity:.55;transition:.25s}
  .pdp-thumb img{width:100%;height:100%;object-fit:cover}
  .pdp-thumb.on,.pdp-thumb:hover{opacity:1}
  .pdp-info{position:sticky;top:calc(var(--anno-h) + 96px)}
  .pdp-eyebrow{display:inline-block;font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;font-weight:600;color:#fff;background:var(--accent);padding:4px 10px;margin-bottom:16px}
  .pdp-info h1{font-size:clamp(1.8rem,3vw,2.5rem);font-weight:300;line-height:1.15;margin-bottom:14px}
  .pdp-price{display:flex;align-items:baseline;gap:12px;margin-bottom:22px}
  .pdp-price .price-old{color:var(--muted);text-decoration:line-through;font-size:15px}
  .pdp-price .price-now{color:var(--accent);font-weight:600;font-size:22px}
  .pdp-desc{color:var(--ink2);font-size:14.5px;line-height:1.75;margin-bottom:26px;max-width:460px}
  .pdp-opt-label{font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:11px}
  .pdp-mat{margin:0 0 26px}
  .pdp-mat .sw{width:27px;height:27px}
  .pdp-mat .sw-label{font-size:12.5px}
  .pdp-buy{display:flex;gap:12px;align-items:stretch;margin-bottom:16px;max-width:460px}
  .qty{display:flex;align-items:center;border:1px solid var(--line2);border-radius:2px}
  .qty button{width:44px;background:none;border:none;font-size:18px;color:var(--ink);cursor:pointer;font-family:var(--f)}
  .qty input{width:42px;text-align:center;border:none;background:none;font-family:var(--f);font-size:14px;color:var(--ink)}
  .qty input:focus{outline:none}
  .pdp-add{flex:1;display:inline-flex;align-items:center;justify-content:center;gap:10px;background:var(--ink);color:var(--paper);border:none;font-family:var(--f);font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;font-weight:500;padding:16px;cursor:pointer;transition:.3s}
  .pdp-add:hover{background:var(--ink2)}
  .pdp-add svg{width:16px;height:16px}
  .pdp-wish{display:inline-flex;align-items:center;gap:8px;background:none;border:none;cursor:pointer;color:var(--ink2);font-family:var(--f);font-size:12.5px;letter-spacing:.04em;padding:6px 0;margin-bottom:30px;transition:color .25s}
  .pdp-wish:hover{color:var(--ink)}
  .pdp-wish svg{width:17px;height:17px}
  .pdp-wish.on svg{fill:var(--ink);color:var(--ink)}
  .pdp-acc-item{border-top:1px solid var(--line)}
  .pdp-acc-item:last-child{border-bottom:1px solid var(--line)}
  .pdp-acc-h{display:flex;align-items:center;justify-content:space-between;width:100%;background:none;border:none;font-family:var(--f);font-size:12.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink);padding:18px 0;cursor:pointer}
  .pdp-acc-h svg{width:16px;height:16px;stroke-width:1.6;transition:transform .3s}
  .pdp-acc-item.open .pdp-acc-h svg{transform:rotate(180deg)}
  .pdp-acc-p{max-height:0;overflow:hidden;transition:max-height .4s ease}
  .pdp-acc-p p{color:var(--ink2);font-size:13.5px;line-height:1.7;padding:0 0 20px}
  /* product tabs */
  .ptabs{margin-top:84px}
  .ptabs-nav{display:flex;justify-content:center;flex-wrap:wrap;gap:clamp(20px,3vw,46px);border-bottom:1px solid var(--line)}
  .ptab-btn{position:relative;background:none;border:none;font-family:var(--f);font-size:15px;color:var(--ink2);padding:24px 2px;cursor:pointer;letter-spacing:.01em;transition:color .25s}
  .ptab-btn:hover{color:var(--ink)}
  .ptab-btn.on{color:var(--ink)}
  .ptab-btn.on::before{content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);width:64px;height:2px;background:var(--ink)}
  .ptab-panel{display:none;max-width:880px;margin:0 auto;padding:46px 0 6px}
  .ptab-panel.on{display:block}
  .ptab-panel h4{font-size:17px;font-weight:500;color:var(--ink);margin:32px 0 16px}
  .ptab-panel h4:first-child{margin-top:0}
  .ptab-panel ul{list-style:none;margin:0 0 6px}
  .ptab-panel li{position:relative;padding-left:26px;margin-bottom:13px;color:var(--ink2);font-size:14.5px;line-height:1.6}
  .ptab-panel li::before{content:"";position:absolute;left:3px;top:8px;width:7px;height:7px;border:1px solid var(--muted);border-radius:50%}
  .ptab-panel p{color:var(--ink2);font-size:14.5px;line-height:1.78;margin-top:20px}
  .spec-table{width:100%;border-collapse:collapse}
  .spec-table th,.spec-table td{text-align:left;padding:14px 16px;border:1px solid var(--line);font-size:14px;vertical-align:top}
  .spec-table th{background:var(--greige3);color:var(--ink);font-weight:500;width:34%}
  .spec-table td{color:var(--ink2)}
  .reviews-empty{color:var(--ink2);font-size:14.5px;text-align:center;padding:30px 0}
  @media(max-width:560px){.ptab-btn{font-size:13.5px;padding:18px 2px}}
  .pdp-rel{margin-top:90px}
  .pdp-rel h2{font-size:clamp(1.4rem,2.4vw,1.9rem);font-weight:300;text-align:center;margin-bottom:40px}
  .pdp-rel .card__img{border-radius:5px}
  @media(max-width:900px){.pdp-wrap{grid-template-columns:1fr;gap:28px}.pdp-info{position:static}}

/* ==== to-top overrides vs base.css (from san-pham.html) ==== */
.to-top{background:var(--ink2);border:1px solid var(--line2);box-shadow:0 8px 20px rgba(44,46,47,.16)}