/* ============================================================
   SENSCERA — product detail page (PDP) + checkout
   Loaded on product pages and checkout only.
   ============================================================ */
.pdp{max-width:1200px;margin:0 auto;padding:20px}
.pdp-crumb{font-family:var(--f-mono);font-size:.66rem;letter-spacing:.12em;text-transform:uppercase;color:var(--silver-500);display:flex;flex-wrap:wrap;align-items:center;gap:7px;margin-bottom:18px}
.pdp-crumb a:hover{color:var(--ink)}
.pdp-crumb .sep{opacity:.5}
.pdp-crumb .cur{color:var(--signal)}

.pdp-top{display:grid;grid-template-columns:1fr;gap:26px}

/* ---- gallery ---- */
.gallery{display:flex;flex-direction:column;gap:12px}
.gal-main{position:relative;aspect-ratio:1;background:var(--silver-50);border:1px solid var(--line-ink);border-radius:4px;overflow:hidden}
.gal-main img,.gal-main video{width:100%;height:100%;object-fit:contain;padding:16px}
.gal-main video{padding:0;object-fit:cover}
.gal-main .ph{position:absolute;inset:0;display:grid;place-items:center}
.gal-main .ph .b{width:32%;height:64%;border-radius:8px 8px 4px 4px;background:linear-gradient(150deg,#f3f4f5,#c3c7cc 50%,#8b9096 82%,#d4d7db);box-shadow:inset 0 0 0 1px rgba(255,255,255,.4),0 18px 30px -18px rgba(0,0,0,.5);position:relative}
.gal-main .ph .b.dark{background:linear-gradient(150deg,#3a3c3f,#0e0f10 60%,#2a2c2f)}
.gal-zoom{position:absolute;top:12px;right:12px;width:38px;height:38px;border-radius:50%;background:#fff;border:1px solid var(--line-ink);display:grid;place-items:center;z-index:2}
.gal-zoom svg{width:18px;height:18px;stroke:var(--ink);fill:none;stroke-width:1.6}
.gal-thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.gthumb{position:relative;aspect-ratio:1;background:var(--silver-50);border:1px solid var(--line-ink);border-radius:3px;overflow:hidden;cursor:pointer;transition:.2s var(--ease)}
.gthumb img{width:100%;height:100%;object-fit:contain;padding:8px}
.gthumb.active{border-color:var(--signal)}
.gthumb .play{position:absolute;inset:0;display:grid;place-items:center;background:rgba(10,10,11,.25)}
.gthumb .play svg{width:26px;height:26px;fill:#fff}
.gthumb .ph-sm{position:absolute;inset:0;background:radial-gradient(120% 120% at 40% 30%,#fff,#e6e8ea 60%,#c9cdd2)}

/* ---- buy box ---- */
.buy .series{font-family:var(--f-mono);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--signal);font-weight:600}
.buy h1{font-family:var(--f-display);font-weight:800;letter-spacing:-.01em;line-height:1.02;font-size:clamp(1.9rem,6vw,2.7rem);margin:8px 0 10px}
.buy .tagline{font-family:var(--f-display);font-weight:700;font-size:1rem;margin-bottom:12px}
.buy .desc{color:var(--steel);font-size:.95rem;line-height:1.6;max-width:52ch}
.buy-feats{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin:22px 0;max-width:460px}
.buy-feat{display:flex;flex-direction:column;align-items:center;text-align:center;gap:8px}
.buy-feat .ic{width:40px;height:40px;display:grid;place-items:center}
.buy-feat .ic svg{width:30px;height:30px;stroke:var(--ink);fill:none;stroke-width:1.3}
.buy-feat span{font-size:.74rem;color:var(--steel);line-height:1.3}
.buy-label{font-family:var(--f-mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--steel);margin-bottom:10px;display:block}
.sizes{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:22px}
.size-pill{min-width:76px;padding:12px 16px;border:1px solid var(--line-ink);font-family:var(--f-mono);font-size:.82rem;text-align:center;transition:.15s var(--ease);background:#fff}
.size-pill[aria-pressed="true"]{border-color:var(--signal);color:var(--signal);box-shadow:inset 0 0 0 1px var(--signal)}
.buy-price{font-family:var(--f-mono);font-weight:500;font-size:1.5rem;color:var(--signal);margin-bottom:18px}
.buy-actions{display:flex;gap:10px;margin-bottom:20px}
.qty{display:inline-flex;align-items:center;border:1px solid var(--line-ink)}
.qty button{width:46px;height:52px;font-size:1.2rem;color:var(--ink)}
.qty span{min-width:40px;text-align:center;font-family:var(--f-mono);font-size:.95rem}
.btn-add{flex:1;background:var(--signal);color:#fff;border:0;font-weight:600;font-size:.9rem;letter-spacing:.04em;display:inline-flex;align-items:center;justify-content:center;gap:10px;transition:.2s var(--ease)}
.btn-add:hover{background:#c00f16}
.btn-wish{width:52px;height:52px;flex:none;border:1px solid var(--line-ink);display:grid;place-items:center;transition:.2s var(--ease)}
.btn-wish svg{width:20px;height:20px;stroke:var(--ink);fill:none;stroke-width:1.5}
.btn-wish[aria-pressed="true"]{border-color:var(--signal)}
.btn-wish[aria-pressed="true"] svg{fill:var(--signal);stroke:var(--signal)}
.trust{display:flex;flex-wrap:wrap;gap:18px;padding-top:18px;border-top:1px solid var(--line-ink)}
.trust .t{display:flex;align-items:center;gap:8px;font-size:.72rem;color:var(--steel);line-height:1.2}
.trust .t svg{width:26px;height:26px;stroke:var(--ink);fill:none;stroke-width:1.3;flex:none}

/* ---- tabs ---- */
.tabs{margin-top:44px;border-top:1px solid var(--line-ink)}
.tablist{display:flex;gap:0;overflow-x:auto;-webkit-overflow-scrolling:touch;border-bottom:1px solid var(--line-ink);scrollbar-width:none}
.tablist::-webkit-scrollbar{display:none}
.tab{position:relative;padding:16px 18px;white-space:nowrap;font-family:var(--f-mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--silver-500);border-bottom:2px solid transparent;margin-bottom:-1px;transition:.15s var(--ease)}
.tab[aria-selected="true"]{color:var(--ink);border-bottom-color:var(--signal)}
.tab:hover{color:var(--ink)}
.tabpanel{padding:34px 0}
.tabpanel[hidden]{display:none}
.tabpanel h3{font-family:var(--f-display);font-weight:800;font-size:1.4rem;letter-spacing:-.01em;margin:0 0 14px}
.tabpanel h4{font-family:var(--f-display);font-weight:700;font-size:1rem;margin:22px 0 8px}
.tabpanel p{color:var(--steel);line-height:1.7;max-width:70ch;margin-bottom:12px}
.tabpanel ul{list-style:none;max-width:70ch;margin:12px 0}
.tabpanel ul li{position:relative;padding-left:22px;margin-bottom:9px;color:var(--steel);line-height:1.55}
.tabpanel ul li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;background:var(--signal)}
.eyebrow-sm{font-family:var(--f-mono);font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;color:var(--signal);display:block;margin-bottom:16px}

/* square visual grids (technology + ingredients) */
.sq-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.sq{position:relative;background:var(--silver-50);border:1px solid var(--line-ink);border-radius:4px;overflow:hidden}
.sq .sq-media{position:relative;aspect-ratio:1;overflow:hidden;background:#0d0d0f}
.sq .sq-media img,.sq .sq-media video{width:100%;height:100%;object-fit:cover;display:block}
.sq .sq-cap{padding:14px 14px 16px}
.sq .sq-cap .n{font-family:var(--f-display);font-weight:700;font-size:.92rem;letter-spacing:.02em}
.sq .sq-cap .r{font-family:var(--f-mono);font-size:.6rem;letter-spacing:.1em;text-transform:uppercase;color:var(--silver-500);margin:3px 0 6px}
.sq .sq-cap p{font-size:.8rem;color:var(--steel);line-height:1.5;margin:0}
/* abstract ingredient media (no photo needed) */
.ing-a{background:radial-gradient(60% 60% at 35% 30%,#fff,#dfe1e4 55%,#b7bbc0)}
.ing-b{background:radial-gradient(70% 70% at 60% 35%,#fff,#e7e9ec 50%,#c6cace);}
.ing-c{background:radial-gradient(50% 50% at 45% 40%,#fff,#d6d9dc 60%,#a9adb2)}
.ing-d{background:linear-gradient(140deg,#f2f3f4,#cfd2d6 60%,#9fa3a8)}
.ing-media{position:relative}
.ing-media::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 30% 30%,rgba(255,255,255,.7),transparent 40%),radial-gradient(circle at 70% 60%,rgba(228,20,28,.10),transparent 45%)}

/* how to use steps */
.steps{counter-reset:s;display:grid;gap:14px;max-width:70ch}
.step{display:grid;grid-template-columns:auto 1fr;gap:16px;align-items:start}
.step .num{counter-increment:s;font-family:var(--f-mono);font-size:.8rem;color:#fff;background:var(--signal);width:30px;height:30px;display:grid;place-items:center;border-radius:50%}
.step .num::before{content:counter(s,decimal-leading-zero)}
.step h4{margin:2px 0 4px}
.step p{margin:0}

/* results */
.results-row{display:grid;grid-template-columns:1fr 1fr;gap:2px;margin:8px 0 20px}
.rstat{background:var(--silver-50);padding:22px 16px;text-align:center}
.rstat .big{font-family:var(--f-display);font-weight:800;font-size:1.9rem;color:var(--signal);line-height:1}
.rstat .lbl{font-size:.78rem;color:var(--steel);margin-top:8px;line-height:1.35}

/* reviews */
.rev-head{display:flex;flex-wrap:wrap;align-items:center;gap:18px;margin-bottom:22px}
.rev-score{font-family:var(--f-display);font-weight:800;font-size:2.6rem;line-height:1}
.rev-stars{color:var(--signal);letter-spacing:2px;font-size:1.1rem}
.rev-count{font-family:var(--f-mono);font-size:.72rem;color:var(--silver-500);letter-spacing:.06em}
.rev{padding:18px 0;border-top:1px solid var(--line-ink)}
.rev .top{display:flex;justify-content:space-between;gap:10px;margin-bottom:6px}
.rev .who{font-weight:600;font-size:.9rem}
.rev .st{color:var(--signal);font-size:.8rem;letter-spacing:1px}
.rev p{font-size:.9rem;margin:0;color:var(--steel)}
.rev-note{margin-top:18px;font-size:.72rem;color:var(--silver-500);font-style:italic}

/* related */
.related{max-width:1200px;margin:8px auto 0;padding:40px 20px 0}
.related-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:18px}
.related-head h2{font-family:var(--f-display);font-weight:700;font-size:1rem;letter-spacing:.08em;text-transform:uppercase}
.related-head a{font-family:var(--f-mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;color:var(--signal)}
.related-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}

/* assurance bar (brand footer strip) */
.assure{background:var(--ink);color:#fff;margin-top:48px}
.assure-in{max-width:1200px;margin:0 auto;padding:30px 20px;display:grid;grid-template-columns:1fr 1fr;gap:22px}
.assure .a{display:flex;gap:12px;align-items:flex-start}
.assure .a svg{width:30px;height:30px;stroke:#fff;fill:none;stroke-width:1.2;flex:none}
.assure .a b{font-family:var(--f-display);font-size:.82rem;letter-spacing:.02em;display:block;margin-bottom:3px}
.assure .a span{font-size:.72rem;color:var(--silver-300);line-height:1.4}

/* ---- checkout ---- */
.checkout{max-width:900px;margin:0 auto;padding:26px 20px 60px}
.checkout h1{font-family:var(--f-display);font-weight:800;font-size:1.8rem;margin-bottom:6px}
.checkout .sub{color:var(--steel);margin-bottom:24px;font-size:.92rem}
.co-grid{display:grid;grid-template-columns:1fr;gap:24px}
.co-items{border:1px solid var(--line-ink);border-radius:4px}
.co-row{display:grid;grid-template-columns:60px 1fr auto;gap:14px;padding:16px;border-bottom:1px solid var(--line-ink);align-items:center}
.co-row:last-child{border-bottom:0}
.co-row .cthumb{width:60px;height:60px;background:var(--silver-50);border-radius:3px;overflow:hidden}
.co-row .cthumb img{width:100%;height:100%;object-fit:contain;padding:6px}
.co-row .n{font-family:var(--f-display);font-weight:700;font-size:.86rem;text-transform:uppercase;letter-spacing:.02em}
.co-row .m{font-family:var(--f-mono);font-size:.66rem;color:var(--silver-500);margin-top:3px}
.co-row .p{font-family:var(--f-mono);font-size:.84rem;color:var(--signal)}
.co-summary{border:1px solid var(--line-ink);border-radius:4px;padding:20px;height:fit-content}
.co-line{display:flex;justify-content:space-between;font-size:.86rem;margin-bottom:10px;color:var(--steel)}
.co-total{display:flex;justify-content:space-between;font-family:var(--f-mono);font-size:1.15rem;color:var(--ink);padding-top:12px;border-top:1px solid var(--line-ink);margin-top:6px}
.pay{margin-top:18px}
.pay-btn{width:100%;padding:16px;background:var(--signal);color:#fff;font-weight:600;letter-spacing:.04em;display:flex;align-items:center;justify-content:center;gap:10px;margin-bottom:10px}
.pay-btn.alt{background:#0A0A0B}
.pay-note{font-size:.72rem;color:var(--silver-500);line-height:1.5;margin-top:12px;padding:12px;background:var(--silver-50);border-left:2px solid var(--signal)}
.co-empty{text-align:center;padding:60px 20px;color:var(--silver-500);font-family:var(--f-mono);letter-spacing:.06em}
.co-empty a{color:var(--signal)}

/* ---- responsive ---- */
@media(min-width:768px){
  .pdp{padding:28px 40px}
  .pdp-top{grid-template-columns:1fr 1fr;gap:40px;align-items:start}
  .sq-grid{grid-template-columns:repeat(3,1fr)}
  .results-row{grid-template-columns:repeat(4,1fr)}
  .related-grid{grid-template-columns:repeat(4,1fr)}
  .assure-in{grid-template-columns:repeat(4,1fr)}
  .related{padding:48px 40px 0}
  .checkout{padding:34px 40px 70px}
  .co-grid{grid-template-columns:1.6fr 1fr}
  .buy-feats{grid-template-columns:repeat(4,1fr)}
}
@media(min-width:1024px){
  .pdp-top{grid-template-columns:1.05fr 1fr;gap:52px}
  .gallery{position:sticky;top:20px}
  .assure-in{grid-template-columns:repeat(5,1fr)}
}
@media(prefers-reduced-motion:reduce){.gal-main video{display:none}}