:root{--primary:#4f6df5;--primary-dark:#344fd5;--ink:#161923;--muted:#6f7480;--line:#e8eaf0;--soft:#f5f7ff;--danger:#e5484d;--success:#0a9b70;--yellow:#ffb800;--shadow:0 18px 50px rgba(27,35,65,.12);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:#f3f4f8}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;min-width:320px;background:#f3f4f8;color:var(--ink);font-size:15px;line-height:1.55}
button,input,textarea,select{font:inherit}
button,a{-webkit-tap-highlight-color:transparent}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
h1,h2,h3,p{margin-top:0}
.button{appearance:none;border:0;border-radius:999px;background:var(--primary);color:#fff;display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 22px;font-weight:800;cursor:pointer;box-shadow:0 8px 18px rgba(79,109,245,.2);transition:.2s ease}
.button:hover{background:var(--primary-dark);transform:translateY(-1px)}
.button--outline{background:#fff;color:var(--primary);border:1.5px solid var(--primary);box-shadow:none}
.button--small{min-height:40px;padding:0 16px;font-size:13px}
.eyebrow{display:block;color:var(--primary);font-size:12px;font-weight:900;letter-spacing:.11em;text-transform:uppercase}
.stars{color:var(--yellow);letter-spacing:.05em}
.muted{color:var(--muted)}

/* Trang chủ */
.shop-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.93);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.shop-header__inner{max-width:1160px;height:74px;margin:auto;padding:0 22px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:12px}.brand__mark{width:44px;height:44px;border-radius:14px;background:linear-gradient(135deg,var(--primary),#7b52ef);display:grid;place-items:center;color:#fff;font-weight:900;box-shadow:0 9px 20px rgba(79,109,245,.25)}.brand__mark {overflow: hidden;padding: 0;}.brand__mark img {width: 100%;height: 100%;object-fit: cover;}
.brand strong,.brand small{display:block}.brand strong{font-size:16px}.brand small{font-size:12px;color:var(--muted);margin-top:2px}
.header-contact{border:1px solid var(--line);border-radius:999px;padding:10px 17px;font-weight:800;background:#fff}
.home-hero{background:radial-gradient(circle at 85% 20%,rgba(125,93,255,.3),transparent 36%),linear-gradient(135deg,#172250 0%,#293f9b 53%,#5d78ff 100%);color:#fff;min-height:380px;display:grid;align-items:center}
.home-hero__content{width:min(1160px,100%);margin:auto;padding:64px 22px}
.home-hero .eyebrow{color:#cbd4ff}.home-hero h1{font-size:clamp(38px,6vw,68px);line-height:1.02;letter-spacing:-.045em;margin:12px 0 22px;max-width:760px}.home-hero p{font-size:18px;color:#e5e9ff;max-width:620px}
.hero-trust{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}.hero-trust span{padding:9px 14px;border:1px solid rgba(255,255,255,.25);border-radius:999px;background:rgba(255,255,255,.09);font-weight:700}
.product-catalog{max-width:1160px;margin:auto;padding:72px 22px}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px}.section-heading h2{font-size:clamp(28px,4vw,42px);line-height:1.1;margin:7px 0 0}.product-count{color:var(--muted);white-space:nowrap}
.product-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.product-card{background:#fff;border:1px solid var(--line);border-radius:22px;overflow:hidden;box-shadow:0 10px 30px rgba(27,35,65,.06);transition:.2s}.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.product-card__image{position:relative;display:block;aspect-ratio:1/1;background:#eee;overflow:hidden}.product-card__image img{width:100%;height:100%;object-fit:cover;transition:.35s}.product-card:hover .product-card__image img{transform:scale(1.025)}.sale-chip{position:absolute;left:14px;top:14px;padding:7px 11px;border-radius:999px;background:#e84c54;color:#fff;font-size:12px;font-weight:900}
.product-card__body{padding:20px}.rating-line{display:flex;justify-content:space-between;color:var(--muted);font-size:12px}.rating-line span:first-child{color:#a97100;font-weight:800}.product-card h3{font-size:20px;line-height:1.3;margin:10px 0}.product-card__body>p{color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:47px}.product-card__footer{border-top:1px solid var(--line);padding-top:16px;display:flex;align-items:center;justify-content:space-between;gap:12px}.product-card__footer small,.product-card__footer strong{display:block}.product-card__footer small{color:var(--muted)}.product-card__footer strong{font-size:21px}
.empty-state{background:#fff;border:1px dashed #cbd0dd;border-radius:20px;padding:48px;text-align:center}.shop-promise{max-width:1160px;margin:0 auto 70px;padding:0 22px;display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.shop-promise>div{background:#fff;border-radius:18px;padding:20px;border:1px solid var(--line);display:grid;grid-template-columns:auto 1fr;column-gap:12px}.shop-promise>div>span{grid-row:1/3;width:38px;height:38px;background:#e9edff;color:var(--primary);border-radius:50%;display:grid;place-items:center;font-weight:900}.shop-promise small{color:var(--muted)}
.store-footer{background:#14192b;color:#fff;text-align:center;padding:38px 20px}.store-footer p{color:#adb5d1;margin:8px 0}.store-footer a{font-weight:900;color:#cbd3ff}

/* Landing sản phẩm */
.landing-shell{width:min(520px,100%);margin:0 auto 76px;background:#fff;min-height:100vh;box-shadow:0 0 45px rgba(34,42,70,.08)}
.landing-tabs{position:sticky;top:0;z-index:20;height:52px;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);display:grid;grid-template-columns:repeat(3,1fr);border-bottom:1px solid var(--line)}.landing-tabs a{display:grid;place-items:center;font-weight:700;font-size:13px;color:#555b68}.landing-tabs a:hover{color:var(--primary)}
.top-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;padding:10px 12px}.top-actions .button{min-height:46px;padding:0 12px;font-size:14px}
.product-gallery{position:relative;background:#eee;overflow:hidden}.gallery-track{display:flex;overflow:auto;scroll-snap-type:x mandatory;scrollbar-width:none}.gallery-track::-webkit-scrollbar{display:none}.gallery-slide{flex:0 0 100%;aspect-ratio:1/1;scroll-snap-align:start;margin:0;background:#eee}.gallery-slide img{width:100%;height:100%;object-fit:cover}
.gallery-arrow{position:absolute;top:50%;transform:translateY(-50%);width:36px;height:36px;border:0;border-radius:50%;background:rgba(255,255,255,.84);box-shadow:0 4px 16px #0002;font-size:26px;display:grid;place-items:center;cursor:pointer}.gallery-arrow--prev{left:10px}.gallery-arrow--next{right:10px}.gallery-dots{position:absolute;left:50%;bottom:10px;transform:translateX(-50%);display:flex;gap:5px;padding:6px 9px;border-radius:999px;background:rgba(0,0,0,.25)}.gallery-dots button{width:6px;height:6px;padding:0;border:0;border-radius:50%;background:#fff8}.gallery-dots button.is-active{width:18px;border-radius:9px;background:#fff}
.benefit-ribbon{display:grid;grid-template-columns:repeat(3,1fr);color:#fff;background:linear-gradient(90deg,#3327d9,#18a5a7);text-align:center}.benefit-ribbon span{padding:8px 4px;display:flex;flex-direction:column;line-height:1.18;border-right:1px solid #fff3}.benefit-ribbon span:last-child{border:0}.benefit-ribbon strong{font-size:12px;font-style:italic}.benefit-ribbon small{text-decoration:underline;font-size:11px}
.flash-bar{background:linear-gradient(100deg,#4f64ef,#527cf8);color:#fff;display:flex;align-items:center;gap:8px;min-height:44px;padding:7px 12px;font-size:12px}.flash-bar strong{font-size:13px;margin-right:auto}.flash-bar time{display:flex;gap:3px}.flash-bar time b{min-width:22px;padding:3px;border-radius:5px;background:#fff2;text-align:center}.flash-bar--inactive{background:#747b8e}.flash-bar--inactive strong{margin-right:0}.flash-bar--inactive span{margin-left:auto}
.product-summary{padding:18px 14px 16px}.price-list{display:grid;gap:8px}.price-row{width:100%;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:2px 10px;align-items:center;text-align:left;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;cursor:pointer}.price-row.is-selected{border-color:var(--primary);box-shadow:0 0 0 2px color-mix(in srgb,var(--primary) 14%,transparent);background:var(--soft)}.price-row__name{font-size:12px;color:var(--muted);font-weight:700}.price-row__numbers{display:flex;align-items:center;gap:8px}.price-row__numbers strong{font-size:21px;color:#111}.price-row__numbers del{color:#9297a3;font-size:13px}.price-row em{grid-column:2;grid-row:1/3;color:#d84a50;background:#fff0f1;border-radius:999px;padding:4px 8px;font-style:normal;font-size:11px;white-space:nowrap}.sale-note{color:#d93d48;font-size:13px;font-weight:700;margin:12px 0 6px}.product-summary h1{font-size:21px;line-height:1.48;margin:8px 0 5px}.product-lead{color:#505563;margin-bottom:10px}.product-stats{display:flex;align-items:center;gap:5px;color:#777d88;font-size:12px}.product-stats span:last-child{margin-left:5px}.blue-divider{height:2px;margin:0 14px;background:var(--primary);opacity:.85}
.shipping-card,.reviews-section,.description-section{padding:20px 14px}.section-title-row{display:flex;align-items:center;justify-content:space-between;gap:10px}.section-title-row h2,.description-section>h2{font-size:17px;margin:0}.section-title-row>span{font-size:12px;color:#e54b50}.section-title-row del{color:#999}.shipping-card ul{list-style:none;padding:0;margin:15px 0 0;display:grid;gap:10px}.shipping-card li{display:flex;gap:8px;font-size:13px}.shipping-card li span{width:22px}.text-button{border:0;background:none;color:var(--muted);font-size:12px;cursor:pointer}.review-score{display:flex;gap:8px;margin:5px 0 18px;font-size:12px}.reviews-list{display:grid;gap:20px}.review-item{display:grid;grid-template-columns:38px 1fr;gap:10px}.review-item.is-extra{display:none}.reviews-list.show-all .review-item.is-extra{display:grid}.review-avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,#d8defe,#f3d9e3);display:grid;place-items:center;font-weight:900;color:#4a526a}.review-item strong{font-size:13px}.review-item .stars{font-size:11px}.review-item p{margin:5px 0 0;color:#3f434d;font-size:13px;line-height:1.55}
.shop-card{margin:18px 14px;padding:14px 4px;display:flex;align-items:center;gap:14px}.shop-avatar{width:66px;height:66px;flex:0 0 auto;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,#202a5f,#5a73ef);color:#fff;font-size:22px;font-weight:900}.shop-card__info h2{font-size:17px;text-transform:uppercase;margin:0 0 5px}.shop-card__info p{margin:0 0 4px}.trust-badge,.rating-badge{display:inline-block;padding:3px 8px;border-radius:4px;margin-right:6px;font-size:11px;font-weight:700}.trust-badge{background:#ffe9a8}.rating-badge{background:#dff8ee;color:#087e5d}.shop-card__info>strong,.shop-card__info>span{font-size:12px}
.rich-content{font-size:14px;line-height:1.7}.rich-content h2,.rich-content h3{font-size:16px;margin:20px 0 8px}.rich-content p{margin:0 0 12px}.rich-content ul,.rich-content ol{padding-left:20px}.final-cta{margin:8px 14px 24px;padding:22px;border-radius:18px;background:linear-gradient(135deg,#eef1ff,#f8f4ff);text-align:center}.final-cta h2{font-size:20px;margin-bottom:6px}.final-cta p{color:var(--muted);font-size:13px}.final-cta>div{display:grid;grid-template-columns:1fr 1fr;gap:8px}.final-cta .button{padding:0 10px;font-size:12px}
.sticky-buy-bar{position:fixed;z-index:35;left:50%;bottom:0;transform:translateX(-50%);width:min(520px,100%);display:grid;grid-template-columns:.8fr 1.2fr;gap:8px;padding:8px 10px calc(8px + env(safe-area-inset-bottom));background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border-top:1px solid var(--line);box-shadow:0 -8px 22px #1111}.sticky-buy-bar a,.sticky-buy-bar button{min-height:46px;border-radius:999px;border:1px solid var(--primary);font-weight:800;cursor:pointer}.sticky-buy-bar a{display:grid;place-items:center;color:var(--primary)}.sticky-buy-bar button{background:var(--primary);color:#fff}

/* Form đặt hàng */
.order-overlay{position:fixed;inset:0;z-index:80;background:rgba(15,20,36,.55);display:flex;align-items:flex-end;justify-content:center;padding-top:40px}.order-overlay[hidden]{display:none}.order-sheet{width:min(540px,100%);max-height:94vh;overflow:auto;background:#fff;border-radius:24px 24px 0 0;padding:20px 18px calc(22px + env(safe-area-inset-bottom));box-shadow:0 -20px 60px #0003}.order-sheet>header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:15px}.order-sheet h2{font-size:23px;margin:2px 0}.order-sheet>header button{border:0;background:#f0f1f5;width:38px;height:38px;border-radius:50%;font-size:26px;cursor:pointer}.variant-options{border:0;padding:0;margin:0 0 15px}.variant-options legend{font-weight:800;margin-bottom:8px}.variant-options{display:grid;gap:8px}.variant-options label{cursor:pointer}.variant-options input{position:absolute;opacity:0}.variant-options label>span{display:flex;justify-content:space-between;gap:10px;padding:11px 12px;border:1px solid var(--line);border-radius:12px}.variant-options input:checked+span{border-color:var(--primary);background:var(--soft);box-shadow:0 0 0 2px color-mix(in srgb,var(--primary) 12%,transparent)}.variant-options small{color:var(--primary);font-weight:900}.quantity-row{display:flex;align-items:center;justify-content:space-between;margin:13px 0}.quantity-row>label{font-weight:800}.quantity-control{display:grid;grid-template-columns:38px 52px 38px;border:1px solid var(--line);border-radius:10px;overflow:hidden}.quantity-control button,.quantity-control input{height:38px;border:0;background:#fff;text-align:center}.quantity-control button{font-size:20px;cursor:pointer;background:#f6f7fa}.quantity-control input{-moz-appearance:textfield}.quantity-control input::-webkit-outer-spin-button,.quantity-control input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.form-field{display:grid;gap:5px;margin-top:11px}.form-field>span{font-size:13px;font-weight:800}.form-field em{font-weight:400;color:var(--muted)}.form-field input,.form-field textarea{width:100%;border:1px solid #d9dce5;border-radius:11px;padding:11px 12px;outline:none;background:#fff}.form-field textarea{min-height:70px;resize:vertical}.form-field input:focus,.form-field textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px color-mix(in srgb,var(--primary) 12%,transparent)}.form-field small{color:var(--danger);min-height:0}.order-total{margin:16px 0 10px;padding:13px 0;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}.order-total strong{font-size:22px}.order-submit{width:100%}.privacy-note{font-size:11px;color:var(--muted);text-align:center;margin:8px 0 0}.honeypot{position:absolute!important;left:-9999px!important}.order-result{padding:15px;border-radius:12px;margin-top:12px;text-align:center}.order-result.success{background:#e7f8f1;color:#087b5a}.order-result.error{background:#fff0f1;color:#b72c36}
.error-page{width:min(600px,calc(100% - 32px));margin:14vh auto;background:#fff;border-radius:22px;text-align:center;padding:48px 24px;box-shadow:var(--shadow)}.error-page>span{font-size:60px;font-weight:900;color:#d7dcf8}.error-page h1{font-size:28px}.error-page p{color:var(--muted);margin-bottom:25px}

@media (max-width:860px){.product-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.home-hero{min-height:330px}}
@media (max-width:600px){body{background:#fff}.shop-header__inner{height:64px;padding:0 14px}.brand small{display:none}.header-contact{font-size:12px;padding:8px 12px}.home-hero__content{padding:48px 18px}.home-hero h1{font-size:40px}.home-hero p{font-size:15px}.product-catalog{padding:44px 14px}.section-heading{align-items:flex-start}.product-count{display:none}.product-grid{grid-template-columns:1fr;gap:16px}.shop-promise{grid-template-columns:1fr;padding:0 14px;margin-bottom:40px}.landing-shell{box-shadow:none}.gallery-arrow{width:32px;height:32px}.price-row{grid-template-columns:minmax(0,1fr) auto}.price-row__numbers{display:block}.price-row__numbers strong,.price-row__numbers del{display:block}.price-row em{font-size:10px}.product-summary h1{font-size:19px}.product-stats{flex-wrap:wrap}.final-cta>div{grid-template-columns:1fr}.order-sheet{max-height:96vh}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}