/* =============================================================
   Giao dien rieng cho san pham ID 45411 (Nothing Headphone (a))
   Dich: monatheme/public/pdp-45411/pdp-45411.css
   Chi duoc nap tren dung trang san pham 45411.

   LUU Y QUAN TRONG:
   Ban ve goc dung selector tran (body, .title, .card, .btn, img,
   button, a, *) — de nguyen se lam vo header/mini-cart/footer cua
   toan site. O day MOI class deu doi sang tien to hp411- va moi
   reset deu bi nhot trong .hp411-pdp.
   ============================================================= */

.hp411-pdp{
  --hp411-ink:#16181D; --hp411-muted:#6B7280; --hp411-paper:#FFFFFF; --hp411-surface:#F4F6F8;
  --hp411-line:#E3E6EA; --hp411-accent:#E4002B; --hp411-accent-dark:#B80023;
  --hp411-good:#067A46; --hp411-good-bg:#E9F5EE;
  --hp411-warn:#B45309; --hp411-warn-bg:#FEF6E0;
  --hp411-navy:#1B2A4A; --hp411-navy-bg:#F1F4F9;
  --hp411-promo:#e55e78;   /* dong tra gop duoi gia + dong "Uu dai hang" */
  --hp411-r-sm:8px; --hp411-r:12px; --hp411-r-lg:16px;
  --hp411-shadow:0 12px 32px -12px rgba(16,24,40,.18);
  --hp411-gap:24px;

  color:var(--hp411-ink);
  font-family:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
  font-size:15px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  padding-bottom:96px;   /* chua thanh mua co dinh o mobile */
}
@media(min-width:1024px){ .hp411-pdp{ padding-bottom:32px; } }

/* ============ RESET — nhot trong wrapper, khong ro ri ra ngoai ============ */
.hp411-pdp *,
.hp411-pdp *::before,
.hp411-pdp *::after{ box-sizing:border-box; }
.hp411-pdp img{ max-width:100%; display:block; height:auto; }
.hp411-pdp button{ font-family:inherit; cursor:pointer; }
.hp411-pdp h1,.hp411-pdp h2,.hp411-pdp h3,.hp411-pdp p,.hp411-pdp ul{ margin:0; }
.hp411-pdp ul{ padding:0; list-style:none; }
.hp411-pdp table{ border-collapse:collapse; width:100%; }
.hp411-pdp [hidden]{ display:none !important; }

/* Tieu de trong trang nay. Selector PHAI co tien to .hp411-pdp: de "h2" tran
   thi rule an sang ca h2 cua header/footer/widget tren trang nay. */
.hp411-pdp h1,
.hp411-pdp h2,
.hp411-pdp h3{ font-weight:700; }

/* /template/css/style.css la Meyer reset, co liet ke ca b va strong voi
   "font: inherit" -> xoa luon bold mac dinh cua trinh duyet va khong bu lai.
   Reset do chi (0,0,1) nen rule nay (0,1,1) de bep. Dung xoa. */
.hp411-pdp b,
.hp411-pdp strong{ font-weight:700; }

/* Chi go mau link cho the <a> TRAN. Neu de ".hp411-pdp a" thi rule nay
   (0,1,1) se de bep moi class nut cua minh (0,1,0) -> nut mat chu. */
.hp411-pdp a:not([class]){ color:inherit; }

.hp411-num{ font-family:'IBM Plex Mono','SFMono-Regular',Consolas,monospace; font-variant-numeric:tabular-nums; }

/* ============ LAYOUT ============ */
.hp411-grid{ display:grid; gap:var(--hp411-gap); }
@media(min-width:1024px){
  .hp411-grid{ grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr); gap:48px; align-items:start; }
}

/* ============ GALLERY ============ */
@media(min-width:1024px){ .hp411-gallery{ position:sticky; top:88px; } }
.hp411-gallery__main{
  background:var(--hp411-paper); border:1px solid var(--hp411-line);
  border-radius:var(--hp411-r-lg); overflow:hidden; position:relative;
}
.hp411-gallery__badge{
  position:absolute; top:14px; left:14px; z-index:2;
  background:var(--hp411-accent); color:#fff;
  font-size:11px; font-weight:700; padding:5px 10px; border-radius:6px; letter-spacing:.02em;
  pointer-events:none;   /* de khong chan thao tac keo anh */
}

/* --- Slider anh chinh: scroll-snap cua trinh duyet, khong nut mui ten --- */
.hp411-gallery__track{
  display:flex;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  -webkit-overflow-scrolling:touch;
  scrollbar-width:none;
  overscroll-behavior-x:contain;
  touch-action:pan-y pinch-zoom;   /* van cuon doc trang binh thuong */
}
.hp411-gallery__track::-webkit-scrollbar{ display:none; }
.hp411-gallery__track:focus-visible{ outline:2px solid var(--hp411-accent); outline-offset:-2px; }
.hp411-gallery__track.is-dragging{ cursor:grabbing; scroll-snap-type:none; }
.hp411-slide{ flex:0 0 100%; scroll-snap-align:center; }
.hp411-slide img{
  width:100%; aspect-ratio:1/1; object-fit:contain; background:#fff;
  user-select:none; -webkit-user-drag:none;
}

/* --- Dai thumbnail: keo luot ngang, khong xuong dong nhieu hang --- */
.hp411-gallery__thumbs{
  display:flex; gap:10px; margin-top:10px;
  overflow-x:auto;
  scroll-snap-type:x proximity;
  -webkit-overflow-scrolling:touch;
  scrollbar-width:none;
  padding-bottom:2px;
}
.hp411-gallery__thumbs::-webkit-scrollbar{ display:none; }
.hp411-thumb{
  flex:0 0 calc((100% - 30px) / 4.4);   /* ho 4.4 o -> thay ngay la con keo duoc */
  scroll-snap-align:start;
  background:var(--hp411-paper); border:1.5px solid var(--hp411-line);
  border-radius:var(--hp411-r-sm); padding:0; overflow:hidden; aspect-ratio:1/1;
}
.hp411-thumb img{ width:100%; height:100%; object-fit:contain; user-select:none; -webkit-user-drag:none; }
.hp411-thumb[aria-current="true"]{ border-color:var(--hp411-ink); }

/* ============ THONG TIN ============ */
.hp411-title{ font-size:22px; font-weight:700; letter-spacing:-.02em; margin:16px 0 8px; line-height:1.25; }
@media(min-width:1024px){ .hp411-title{ font-size:27px; margin-top:0; } }
.hp411-meta{
  display:flex; align-items:center; gap:10px; flex-wrap:wrap;
  font-size:12.5px; color:var(--hp411-muted); margin-bottom:18px;
}
.hp411-tag{ background:var(--hp411-good-bg); color:var(--hp411-good); border-radius:99px; padding:3px 10px; font-size:11.5px; font-weight:600; }
.hp411-sku{ font-size:11.5px; }

/* --- Khoi gia --- */
.hp411-price{ border:2px solid var(--hp411-ink); border-radius:var(--hp411-r); overflow:hidden; background:var(--hp411-paper); }
.hp411-price__head{ padding:16px 18px 14px; }
.hp411-price__was{ font-size:13px; color:var(--hp411-muted); text-decoration:line-through; }
.hp411-price__now{
  display:flex; align-items:baseline; gap:10px; flex-wrap:wrap;
  font-size:34px; font-weight:700; letter-spacing:-.03em; line-height:1.05; margin-top:3px;
}
@media(min-width:1024px){ .hp411-price__now{ font-size:38px; } }
.hp411-price__off{
  background:var(--hp411-accent); color:#fff; font-size:12px; font-weight:700;
  padding:4px 9px; border-radius:6px; font-family:'Inter',sans-serif; letter-spacing:.02em;
}
.hp411-price__mo{ margin-top:9px; font-size:13px; color:var(--hp411-promo); font-weight:600; }
.hp411-price__mo b{ font-size:15px; }
.hp411-price__toggle{
  width:100%; background:#FAFBFC; border:0; border-top:1px dashed var(--hp411-line);
  padding:11px 18px; font-size:12.5px; font-weight:600; color:var(--hp411-muted);
  display:flex; justify-content:space-between; align-items:center;
}
.hp411-price__toggle:hover{ color:var(--hp411-ink); }
.hp411-price__rows{ padding:4px 18px 14px; background:#FAFBFC; border-top:1px solid var(--hp411-line); }
.hp411-price__row{ display:flex; justify-content:space-between; gap:12px; font-size:13px; padding:5px 0; color:var(--hp411-muted); }
.hp411-price__row--brand span:first-child{ color:var(--hp411-promo); }
.hp411-price__row--final{ color:var(--hp411-ink); font-weight:700; border-top:1px solid var(--hp411-line); margin-top:6px; padding-top:9px; }

/* --- Chon mau --- */
.hp411-field{ margin-top:24px; }
.hp411-field__label{
  font-size:12px; font-weight:700; letter-spacing:.04em; text-transform:uppercase;
  color:var(--hp411-muted); margin-bottom:10px;
}
.hp411-field__label b{ color:var(--hp411-ink); text-transform:none; letter-spacing:0; font-size:13px; }
.hp411-colors{ display:flex; gap:12px; flex-wrap:wrap; }
.hp411-color{
  width:54px; height:54px; border-radius:var(--hp411-r-sm); border:2px solid var(--hp411-line);
  background:var(--hp411-paper); padding:0; position:relative; overflow:visible;
}
.hp411-color img{ width:100%; height:100%; object-fit:cover; border-radius:5px; }
.hp411-color i{ display:block; width:100%; height:100%; border-radius:5px; background:#DDE1E6; }
.hp411-color[aria-pressed="true"]{ border-color:var(--hp411-ink); }
.hp411-color[aria-pressed="true"]::after{
  content:"✓"; position:absolute; right:-5px; bottom:-5px;
  width:18px; height:18px; border-radius:50%; background:var(--hp411-ink); color:#fff;
  font-size:10px; display:flex; align-items:center; justify-content:center;
}
.hp411-color.is-out{ opacity:.4; }
.hp411-color.is-out::before{
  content:""; position:absolute; inset:0; border-radius:5px;
  background:linear-gradient(to top right,transparent 47%,var(--hp411-muted) 47%,var(--hp411-muted) 53%,transparent 53%);
}
.hp411-color:focus-visible{ outline:2px solid var(--hp411-accent); outline-offset:3px; }

/* --- Nut mua: chi con 1 nut, chiem tron chieu ngang --- */
.hp411-actions{ margin-top:16px; display:grid; gap:10px; }
.hp411-actions .hp411-btn{ width:100%; }
.hp411-btn{
  border:0; border-radius:var(--hp411-r); padding:16px 18px; font-size:15.5px; font-weight:700;
  display:flex; align-items:center; justify-content:center; gap:8px; letter-spacing:.01em;
  text-decoration:none;
}
.hp411-btn--primary{ background:var(--hp411-accent); color:#fff; box-shadow:var(--hp411-shadow); }
.hp411-btn--primary:hover{ background:var(--hp411-accent-dark); color:#fff; }
.hp411-btn:focus-visible{ outline:3px solid rgba(228,0,43,.35); outline-offset:2px; }
.hp411-btn[disabled],.hp411-bar__btn[disabled]{ opacity:.45; cursor:not-allowed; box-shadow:none; }

/* --- Che do "Dat hang truoc" (khi bien the dang chon het hang) ---
   Mau khac han nut mua de khach thay ngay day la hanh dong khac,
   nhung van la CTA chinh nen giu do dam va do noi bat. */
.hp411-btn--preorder{
  background:var(--hp411-navy); color:#fff;
  box-shadow:0 12px 32px -12px rgba(27,42,74,.45);
}
.hp411-btn--preorder:hover{ background:#12203c; color:#fff; }
.hp411-btn--preorder:focus-visible{ outline:3px solid rgba(27,42,74,.35); }
.hp411-bar__btn--preorder{ background:var(--hp411-navy); color:#fff; }
.hp411-bar__btn--preorder:hover{ background:#12203c; color:#fff; }

/* Nut tra gop — ban chat la 1 nut mua hang (act=installment-tgcttc) */
.hp411-inst{
  margin-top:10px; width:100%; background:var(--hp411-navy-bg); border:1px solid #C9D6E8;
  border-radius:var(--hp411-r); padding:12px 14px; display:flex; align-items:center; gap:11px;
  text-align:left; color:var(--hp411-navy);
}
.hp411-inst:hover{ border-color:var(--hp411-navy); }
.hp411-inst b{ display:block; font-size:13px; }
.hp411-inst small{ font-size:11.5px; color:var(--hp411-muted); }

/* ============ CAC BOX THONG TIN (nam duoi nut mua) ============ */
.hp411-stock{
  display:flex; gap:11px; align-items:center; background:var(--hp411-good-bg);
  border-radius:var(--hp411-r); padding:13px 15px; margin-top:16px;
  font-size:13.5px; color:var(--hp411-good); font-weight:600; line-height:1.45;
}
.hp411-stock__dot{
  width:8px; height:8px; border-radius:50%; background:var(--hp411-good); flex-shrink:0;
  box-shadow:0 0 0 4px rgba(6,122,70,.15);
}
.hp411-stock[data-in="0"]{ background:#FDECEC; color:#B3261E; }
.hp411-stock[data-in="0"] .hp411-stock__dot{ background:#B3261E; box-shadow:0 0 0 4px rgba(179,38,30,.15); }

.hp411-gift{
  display:flex; gap:10px; align-items:flex-start; background:var(--hp411-warn-bg);
  border-radius:var(--hp411-r); padding:12px 14px; margin-top:10px;
  font-size:13px; color:var(--hp411-warn); line-height:1.5;
}

/* Nghe thu tai showroom */
.hp411-tryout{
  border:1.5px dashed var(--hp411-navy); background:#F3F6FB; border-radius:var(--hp411-r);
  padding:15px 16px; margin-top:10px;
}
.hp411-tryout h3{ margin:0 0 5px; font-size:14px; color:var(--hp411-navy); }
.hp411-tryout p{ margin:0 0 10px; font-size:12.5px; color:var(--hp411-muted); line-height:1.55; }
.hp411-pdp .hp411-tryout a{
  font-size:12.5px; font-weight:600; color:var(--hp411-navy); text-decoration:none;
  border-bottom:1.5px solid var(--hp411-navy); padding-bottom:1px;
}
.hp411-pdp .hp411-tryout a:hover,
.hp411-pdp .hp411-tryout a:focus,
.hp411-pdp .hp411-tryout a:visited{ color:var(--hp411-navy); text-decoration:none; }

/* The <a> co class -> phai co tien to .hp411-pdp, khong thi bi rule <a> de bep */
.hp411-pdp .hp411-consult{
  margin-top:10px; width:100%; background:var(--hp411-paper); border:1px solid var(--hp411-line);
  border-radius:var(--hp411-r); padding:12px 14px; display:flex; align-items:center; gap:11px;
  text-align:left; color:var(--hp411-ink); text-decoration:none;
}
.hp411-pdp .hp411-consult:hover,
.hp411-pdp .hp411-consult:focus,
.hp411-pdp .hp411-consult:visited{
  border-color:var(--hp411-ink); color:var(--hp411-ink); text-decoration:none;
}
.hp411-consult b{ display:block; font-size:13px; }
.hp411-consult small{ font-size:11.5px; color:var(--hp411-muted); }

.hp411-trust{
  display:grid; grid-template-columns:repeat(3,1fr); gap:10px; margin-top:18px;
  border-top:1px solid var(--hp411-line); padding-top:18px;
}
.hp411-trust__item{ text-align:center; font-size:11.5px; color:var(--hp411-muted); line-height:1.4; }
.hp411-trust__item b{ display:block; font-size:17px; margin-bottom:5px; }

/* ============ PHAN CHI TIET ============ */
.hp411-details{ margin-top:44px; }
@media(min-width:1024px){ .hp411-details{ margin-top:64px; } }
.hp411-details__grid{ display:grid; gap:var(--hp411-gap); }
@media(min-width:1024px){ .hp411-details__grid{ grid-template-columns:1.05fr .95fr; gap:48px; align-items:start; } }

.hp411-card{
  background:var(--hp411-paper); border:1px solid var(--hp411-line);
  border-radius:var(--hp411-r-lg); padding:22px 24px;
}
.hp411-card h2{ font-size:17px; margin:0 0 16px; letter-spacing:-.01em; }

.hp411-benefits li{
  display:grid; grid-template-columns:34px 1fr; gap:12px;
  padding:13px 0; border-bottom:1px solid var(--hp411-line);
}
.hp411-benefits li:last-child{ border-bottom:0; padding-bottom:0; }
.hp411-benefits__ic{
  width:34px; height:34px; border-radius:var(--hp411-r-sm); background:var(--hp411-surface);
  display:flex; align-items:center; justify-content:center; font-size:15px;
}
.hp411-benefits b{ display:block; font-size:14px; margin-bottom:2px; }
.hp411-benefits span span{ font-size:13px; color:var(--hp411-muted); line-height:1.5; }

/* Accordion */
.hp411-acc__item{ border-bottom:1px solid var(--hp411-line); }
.hp411-acc__item:last-child{ border-bottom:0; }
.hp411-acc__btn{
  width:100%; background:none; border:0; padding:15px 0; text-align:left;
  display:flex; justify-content:space-between; align-items:center; gap:12px;
  font-size:14px; font-weight:600; color:var(--hp411-ink);
}
.hp411-acc__btn:hover{ color:var(--hp411-accent); }
.hp411-acc__sign{ font-size:18px; color:var(--hp411-muted); font-weight:400; transition:transform .18s; }
.hp411-acc__btn[aria-expanded="true"] .hp411-acc__sign{ transform:rotate(45deg); }
.hp411-acc__panel{ padding:0 0 16px; }
.hp411-spec{ font-size:13px; }
.hp411-spec th,.hp411-spec td{ padding:8px 0; text-align:left; vertical-align:top; border-bottom:1px solid var(--hp411-line); }
.hp411-spec th{ color:var(--hp411-muted); font-weight:500; width:44%; }
.hp411-spec tr:last-child th,.hp411-spec tr:last-child td{ border-bottom:0; }

/* ============ THANH MUA CO DINH (mobile) ============ */
.hp411-bar{
  position:fixed; left:0; right:0; bottom:0; z-index:60; background:var(--hp411-paper);
  border-top:1px solid var(--hp411-line);
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  display:flex; gap:14px; align-items:center; box-shadow:0 -4px 20px rgba(16,24,40,.08);
}
@media(min-width:1024px){ .hp411-bar{ display:none; } }
.hp411-bar__price{ line-height:1.15; }
.hp411-bar__price strong{ font-size:17px; font-weight:700; letter-spacing:-.02em; display:block; }
.hp411-bar__price small{ display:block; font-size:10.5px; color:var(--hp411-muted); margin-top:1px; }
.hp411-bar__btn{
  flex:1; background:var(--hp411-accent); color:#fff; border:0;
  border-radius:var(--hp411-r); padding:14px; font-size:15px; font-weight:700;
}

/* Trang thai dang goi ajax */
.hp411-pdp.is-loading{ pointer-events:none; }
.hp411-pdp.is-loading .hp411-btn,
.hp411-pdp.is-loading .hp411-bar__btn{ opacity:.6; }

@media(prefers-reduced-motion:reduce){
  .hp411-pdp *{ animation:none !important; transition:none !important; }
}