:root{--blue:#165df5;--blue2:#0b45c8;--ink:#0d1730;--muted:#65718a;--line:#e4e9f2;--soft:#f5f8fd;--danger:#dc2626;--ok:#0a9d72;--shadow:0 16px 45px rgba(23,53,103,.10)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,"Segoe UI",Arial,sans-serif;color:var(--ink);background:#fff}a{text-decoration:none;color:inherit}.shell{width:min(1380px,calc(100% - 44px));margin:auto}.topbar{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.96);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.nav{height:76px;display:flex;align-items:center;gap:34px}.brand{display:flex;align-items:center;gap:12px;margin-right:auto}.brandmark{font-size:28px;font-weight:1000;letter-spacing:5px;color:var(--blue)}.brand b{display:block;font-size:13px}.brand small{font-size:10px;color:var(--muted)}nav{display:flex;gap:28px;font-weight:700;font-size:14px}nav a:hover{color:var(--blue)}.nav-actions{display:flex;gap:10px;align-items:center}.nav-actions select,.admin-link{height:40px;border:1px solid var(--line);border-radius:10px;background:#fff;padding:0 12px;font-weight:700}.admin-link{display:flex;align-items:center}.hero{background:radial-gradient(circle at 70% 40%,#e6f0ff 0,#f7faff 30%,#fff 65%);border-bottom:1px solid var(--line)}.hero-grid{min-height:520px;display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:40px}.eyebrow,.section-title span,.admin-head span{display:inline-flex;color:var(--blue);font-weight:900;font-size:12px;letter-spacing:1.4px;text-transform:uppercase}.hero h1,.product-hero h1{font-size:58px;line-height:1.03;letter-spacing:-2.6px;margin:18px 0;max-width:760px}.hero p,.product-hero p{font-size:18px;line-height:1.65;color:var(--muted);max-width:720px}.hero-points{display:flex;flex-wrap:wrap;gap:14px;margin:24px 0}.hero-points span{background:#fff;border:1px solid #dce5f4;border-radius:12px;padding:12px 15px;font-weight:700;box-shadow:0 7px 24px rgba(34,72,132,.07)}.hero-actions{display:flex;gap:12px;margin-top:28px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;border-radius:10px;border:1px solid #cfd8e8;font-weight:800;background:#fff;color:var(--ink);cursor:pointer}.btn.primary{background:linear-gradient(135deg,var(--blue),#2e77ff);border-color:transparent;color:#fff;box-shadow:0 10px 25px rgba(22,93,245,.22)}.btn.secondary{background:#fff}.btn.mini{min-height:38px;width:100%;color:var(--blue)}.btn.wide{width:100%}.hero-visual{position:relative;height:430px;display:grid;place-items:center}.orb{position:absolute;width:360px;height:360px;border-radius:50%;background:radial-gradient(circle,#b8d7ff 0,#ddecff 35%,transparent 68%);filter:blur(4px)}.cad-card{position:relative;width:380px;height:300px;border:1px solid rgba(20,86,208,.18);background:linear-gradient(145deg,#fff,#eaf2ff);border-radius:40px;box-shadow:0 30px 80px rgba(17,70,164,.18);transform:rotate(-4deg);display:flex;flex-direction:column;align-items:center;justify-content:center}.cad-top{font-size:64px;font-weight:1000;letter-spacing:8px;color:#0e53df}.cad-part{height:82px;width:230px;position:relative;margin:10px}.cad-part i{position:absolute;border:18px solid #0a3d9d;border-radius:30px;width:120px;height:70px;box-shadow:inset 0 0 0 5px #3a89ff}.cad-part i:nth-child(1){left:0;top:0}.cad-part i:nth-child(2){right:0;top:0}.cad-part i:nth-child(3){left:55px;top:10px;border-radius:24px}.cad-card b{font-size:14px}.cad-card span{font-size:11px;color:var(--muted);margin-top:6px}.section{padding:66px 0}.section.soft{background:var(--soft);border-block:1px solid var(--line)}.section-title{display:flex;justify-content:space-between;align-items:end;margin-bottom:28px}.section-title.centered{display:block;text-align:center}.section-title h2{font-size:34px;margin:7px 0 0;letter-spacing:-1.2px}.catalog{display:grid;grid-template-columns:230px 1fr;gap:22px}.categories{border:1px solid var(--line);border-radius:16px;padding:18px;background:#fff;box-shadow:var(--shadow);height:max-content}.categories h3{margin:0 0 12px}.categories a{display:flex;justify-content:space-between;gap:10px;padding:11px;border-radius:9px;font-size:13px}.categories a.active,.categories a:hover{background:#eef4ff;color:var(--blue)}.categories em{font-style:normal;color:var(--muted)}.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.product-grid.wide{grid-template-columns:repeat(4,1fr)}.product-card{border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#fff;transition:.2s;box-shadow:0 8px 24px rgba(29,56,99,.05)}.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#b9d0ff}.product-art{height:155px;background:linear-gradient(145deg,#f7faff,#e8f1ff);display:flex;flex-direction:column;align-items:center;justify-content:center;border-bottom:1px solid var(--line)}.product-art>span{font-size:68px;font-weight:1000;color:#155ce8;text-shadow:0 8px 25px #b8d1ff}.product-art small{font-weight:700;color:var(--muted)}.product-body{padding:18px}.tag{display:inline-block;background:#e8f1ff;color:var(--blue);font-size:10px;font-weight:900;padding:5px 8px;border-radius:7px}.product-body h3{font-size:18px;margin:11px 0 7px}.product-body p{color:var(--muted);font-size:13px;line-height:1.5;min-height:42px}.product-price{font-size:12px;margin:12px 0;color:var(--muted)}.product-price b{color:var(--blue);font-size:15px}.price-strip,.plans-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;max-width:1120px;margin:auto}.price-card,.payment-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px;box-shadow:0 8px 25px rgba(38,61,100,.05)}.price-card.popular{border:2px solid var(--blue);transform:translateY(-7px)}.recommend{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:var(--blue);color:#fff;border-radius:999px;padding:5px 12px;font-size:10px;font-weight:900}.plan-name{display:block;color:var(--blue);font-weight:900}.price-card strong{display:block;font-size:30px;margin:12px 0}.price-card p,.payment-card p{color:var(--muted);font-size:13px}.price-card ul{color:var(--muted);line-height:1.9;padding-left:20px}.qr-mini{width:82px;height:82px;border-radius:10px;background:repeating-conic-gradient(#111 0 25%,#fff 0 50%) 50%/16px 16px;display:grid;place-items:center;color:#fff;text-shadow:0 1px 3px #000;font-weight:900;margin:13px 0}.benefits{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.benefits>div{border-right:1px solid var(--line);padding:16px 22px}.benefits>div:last-child{border:0}.benefits span{font-size:30px;color:var(--blue)}.benefits b{display:block;margin:8px 0}.benefits p{color:var(--muted);font-size:13px}.footer{background:#071632;color:#fff;padding:40px 0}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px}.footer-grid>div{display:flex;flex-direction:column;gap:8px}.footer-grid p,.footer-grid a,.footer-grid span{font-size:12px;color:#c9d5eb}.footer-logo{font-size:32px;font-weight:1000;letter-spacing:7px;color:#4b8bff}.product-hero{background:linear-gradient(180deg,#f4f8ff,#fff);padding:70px 0;border-bottom:1px solid var(--line)}.product-hero-grid{display:grid;grid-template-columns:1.1fr .9fr;align-items:center;gap:60px}.detail-art{height:330px;border:1px solid #dce5f4;border-radius:32px;background:linear-gradient(145deg,#fff,#e9f2ff);display:flex;flex-direction:column;align-items:center;justify-content:center;box-shadow:var(--shadow)}.detail-art span{font-size:120px;font-weight:1000;color:var(--blue)}.checkout-grid,.payment-layout{display:grid;grid-template-columns:1fr 360px;gap:28px;align-items:start}.checkout-card,.payment-main,.success-card{border:1px solid var(--line);border-radius:18px;background:#fff;padding:28px;box-shadow:var(--shadow)}.summary-card{border:1px solid var(--line);border-radius:16px;padding:24px;background:var(--soft);position:sticky;top:100px}.summary-card>span{font-size:11px;color:var(--blue);font-weight:900}.summary-card h3{font-size:20px}.summary-card p{color:var(--muted)}.summary-card>div{display:flex;justify-content:space-between}.form{display:flex;flex-direction:column;gap:15px}.form label{font-size:13px;font-weight:800}.form input,.form textarea,.form select{width:100%;min-height:44px;border:1px solid #cfd8e8;border-radius:9px;padding:10px 12px;font:inherit;margin-top:6px}.form textarea{min-height:80px}.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}.payment-options{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.payment-options label{border:1px solid var(--line);border-radius:11px;padding:13px;display:flex;gap:10px;align-items:center}.payment-options input{width:auto;margin:0}.payment-options small{display:block;color:var(--muted)}.alert{padding:12px 14px;background:#fff2f0;border:1px solid #ffc6bd;color:#9f1f12;border-radius:9px}.payment-page{min-height:650px}.payment-main h1{font-size:32px}.payment-detail{display:grid;grid-template-columns:280px 1fr;gap:24px;margin:22px 0}.qr-box{border:1px solid var(--line);border-radius:15px;background:#fff;min-height:280px;display:flex;flex-direction:column;align-items:center;justify-content:center}.qr-box img{width:100%;max-width:260px;border-radius:10px}.qr-box>span{font-size:70px;font-weight:1000}.qr-box small{color:var(--muted)}.pay-info dl{display:grid;grid-template-columns:150px 1fr;gap:10px}.pay-info dt{color:var(--muted)}.pay-info dd{font-weight:800;margin:0}.pay-info .money{font-size:22px;color:var(--blue)}.success-card{max-width:720px;margin:30px auto;text-align:center}.check{margin:auto;width:60px;height:60px;border-radius:50%;display:grid;place-items:center;background:#e7fbf3;color:var(--ok);font-size:30px}.keybox{border:1px solid var(--line);background:var(--soft);border-radius:12px;padding:15px;display:flex;justify-content:center;gap:15px;margin:18px 0}.keybox code{font-weight:900}.keybox button{border:1px solid var(--line);background:#fff;border-radius:8px;padding:7px 10px}.admin-bg{background:#f4f7fc}.login-card{width:min(430px,calc(100% - 30px));margin:10vh auto;background:#fff;border:1px solid var(--line);border-radius:20px;padding:30px;box-shadow:var(--shadow);text-align:center}.admin-top{height:64px;background:#fff;border-bottom:1px solid var(--line)}.admin-top .shell{height:100%;display:flex;align-items:center;justify-content:space-between}.admin-top a{color:var(--blue);font-weight:800}.admin-shell{display:grid;grid-template-columns:220px 1fr;min-height:calc(100vh - 64px)}.admin-side{padding:22px;background:#0b1b3a;color:#d8e3f8;display:flex;flex-direction:column;gap:5px}.admin-side a{display:flex;justify-content:space-between;padding:12px;border-radius:9px;font-size:13px}.admin-side a.active,.admin-side a:hover{background:#15336b;color:#fff}.admin-side em{font-style:normal;background:#234985;border-radius:999px;padding:1px 7px}.admin-main{padding:28px;min-width:0}.admin-head{display:flex;justify-content:space-between;align-items:end;margin-bottom:20px}.admin-head h1{font-size:30px;margin:4px 0}.admin-table{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:auto;box-shadow:0 8px 28px rgba(37,60,100,.04)}table{width:100%;border-collapse:collapse;font-size:12px}th{text-align:left;background:#f8faff;color:#64708a;padding:13px;border-bottom:1px solid var(--line)}td{padding:13px;border-bottom:1px solid var(--line);vertical-align:middle}td small{display:block;color:var(--muted);margin-top:4px}.status{display:inline-block;padding:5px 9px;border-radius:999px;font-weight:900}.status.pending{background:#fff4e5;color:#c66b00}.status.paid,.status.active{background:#e8fbf3;color:#07845f}.status.revoked{background:#ffecec;color:#c62828}.row-actions{display:flex;gap:6px}.row-actions form{margin:0}.action{border:0;border-radius:7px;padding:7px 9px;font-weight:800;cursor:pointer}.action.primary{background:#eaf1ff;color:var(--blue)}.action.danger{background:#ffeded;color:#c62828}.action.warn{background:#fff1dc;color:#a45c00}.admin-grid{display:grid;grid-template-columns:430px 1fr;gap:20px}.editor,.admin-cards{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px}.form.compact{gap:10px}.checks{display:flex!important;align-items:center;gap:10px}.checks input{width:auto!important}.admin-cards{display:flex;flex-direction:column;gap:10px}.admin-product{display:grid;grid-template-columns:48px 1fr auto;align-items:center;gap:12px;border:1px solid var(--line);border-radius:11px;padding:12px}.admin-product>span{width:48px;height:48px;border-radius:11px;background:#eaf2ff;color:var(--blue);display:grid;place-items:center;font-size:23px;font-weight:1000}.admin-product small{display:block;color:var(--muted);margin-top:3px}.admin-product p{margin:4px 0;color:var(--muted);font-size:12px}.admin-product em{font-style:normal;font-size:10px;font-weight:900;color:var(--ok)}@media(max-width:1000px){nav{display:none}.hero-grid,.product-hero-grid,.checkout-grid,.payment-layout,.admin-grid{grid-template-columns:1fr}.hero-visual{height:350px}.product-grid,.product-grid.wide{grid-template-columns:repeat(2,1fr)}.catalog{grid-template-columns:1fr}.categories{display:none}.price-strip,.plans-grid{grid-template-columns:1fr}.benefits{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr 1fr}.admin-shell{grid-template-columns:1fr}.admin-side{flex-direction:row;overflow:auto}.summary-card{position:static}.payment-detail{grid-template-columns:1fr}}@media(max-width:650px){.shell{width:min(100% - 24px,1380px)}.nav{height:66px}.brand b,.brand small,.admin-link{display:none}.hero-grid{min-height:auto;padding:55px 0}.hero h1,.product-hero h1{font-size:40px}.hero-visual{display:none}.product-grid,.product-grid.wide,.benefits,.grid2,.payment-options{grid-template-columns:1fr}.section{padding:45px 0}.footer-grid{grid-template-columns:1fr}.admin-main{padding:14px}.admin-side{padding:10px}.admin-table{font-size:11px}.price-card.popular{transform:none}}


/* =========================================================
   DTC SOFTWARE CENTER - COMPACT DESKTOP V2.1
   ========================================================= */
@media (min-width:1001px){
  .shell{width:min(1440px,calc(100% - 34px))}
  .nav{height:58px;gap:22px}
  .brandmark{font-size:23px;letter-spacing:4px}
  .brand b{font-size:11px}
  .brand small{font-size:9px}
  nav{gap:20px;font-size:12px}
  .nav-actions select,.admin-link{height:34px;border-radius:8px;padding:0 10px;font-size:12px}

  .hero-grid{min-height:330px;grid-template-columns:1.13fr .87fr;gap:24px}
  .eyebrow,.section-title span,.admin-head span{font-size:10px;letter-spacing:1.1px}
  .hero h1,.product-hero h1{font-size:40px;line-height:1.02;letter-spacing:-1.7px;margin:10px 0 12px;max-width:720px}
  .hero p,.product-hero p{font-size:14px;line-height:1.5;max-width:700px}
  .hero-points{gap:8px;margin:15px 0}
  .hero-points span{border-radius:9px;padding:8px 10px;font-size:11px}
  .hero-actions{gap:9px;margin-top:16px}
  .btn{min-height:36px;padding:0 15px;border-radius:8px;font-size:12px}
  .btn.mini{min-height:31px}
  .hero-visual{height:285px}
  .orb{width:250px;height:250px}
  .cad-card{width:285px;height:220px;border-radius:28px}
  .cad-top{font-size:46px;letter-spacing:6px}
  .cad-part{height:62px;width:180px;margin:5px}
  .cad-part i{border-width:13px;width:94px;height:53px;border-radius:23px}
  .cad-part i:nth-child(3){left:43px;top:7px}
  .cad-card b{font-size:11px}
  .cad-card span{font-size:9px;margin-top:3px}

  .section{padding:34px 0}
  .section-title{margin-bottom:16px}
  .section-title h2{font-size:25px;margin-top:4px;letter-spacing:-.7px}
  .catalog{grid-template-columns:190px 1fr;gap:14px}
  .categories{border-radius:12px;padding:12px}
  .categories h3{font-size:13px;margin-bottom:7px}
  .categories a{padding:8px;font-size:11px;border-radius:7px}
  .product-grid,.product-grid.wide{grid-template-columns:repeat(5,1fr);gap:11px}
  .product-card{border-radius:12px}
  .product-art{height:94px}
  .product-art>span{font-size:43px}
  .product-art small{font-size:9px}
  .product-body{padding:11px}
  .tag{font-size:8px;padding:3px 6px}
  .product-body h3{font-size:14px;margin:7px 0 4px}
  .product-body p{font-size:10px;line-height:1.35;min-height:28px;margin:4px 0}
  .product-price{font-size:10px;margin:7px 0}
  .product-price b{font-size:12px}

  .price-strip,.plans-grid{gap:12px;max-width:1200px}
  .price-card,.payment-card{border-radius:12px;padding:16px}
  .price-card.popular{transform:translateY(-4px)}
  .recommend{top:-10px;padding:4px 9px;font-size:8px}
  .plan-name{font-size:12px}
  .price-card strong{font-size:22px;margin:7px 0}
  .price-card p,.payment-card p{font-size:10px;margin:6px 0}
  .price-card ul{font-size:10px;line-height:1.6}
  .qr-mini{width:58px;height:58px;border-radius:7px;background-size:12px 12px;margin:8px 0;font-size:10px}

  .benefits{gap:8px}
  .benefits>div{padding:9px 14px}
  .benefits span{font-size:22px}
  .benefits b{font-size:11px;margin:4px 0}
  .benefits p{font-size:10px;margin:3px 0}

  .footer{padding:24px 0}
  .footer-grid{gap:20px}
  .footer-grid p,.footer-grid a,.footer-grid span{font-size:10px}
  .footer-logo{font-size:24px;letter-spacing:5px}

  .product-hero{padding:38px 0}
  .product-hero-grid{gap:34px}
  .detail-art{height:235px;border-radius:22px}
  .detail-art span{font-size:80px}

  .checkout-grid,.payment-layout{grid-template-columns:1fr 320px;gap:18px}
  .checkout-card,.payment-main,.success-card{padding:20px;border-radius:14px}
  .summary-card{padding:17px;top:74px}
  .form{gap:10px}
  .form input,.form textarea,.form select{min-height:38px;padding:8px 10px}
  .form textarea{min-height:65px}
  .payment-main h1{font-size:25px}
  .payment-detail{grid-template-columns:220px 1fr;gap:18px;margin:15px 0}
  .qr-box{min-height:220px}
  .qr-box img{max-width:205px}

  .admin-top{height:54px}
  .admin-shell{grid-template-columns:185px 1fr;min-height:calc(100vh - 54px)}
  .admin-side{padding:14px}
  .admin-side a{padding:9px;font-size:11px}
  .admin-main{padding:18px}
  .admin-head{margin-bottom:12px}
  .admin-head h1{font-size:24px}
  th,td{padding:9px;font-size:11px}
  .admin-grid{grid-template-columns:360px 1fr;gap:14px}
  .editor,.admin-cards{padding:14px}
}


/* =========================================================
   DTC SOFTWARE CENTER - BALANCED COMPACT V2.2
   Gọn, sáng, dễ nhìn, không quá nhỏ.
   ========================================================= */
@media (min-width:1001px){
  body{font-size:13px}
  .shell{width:min(1380px,calc(100% - 40px))}

  .nav{height:62px}
  nav{gap:24px;font-size:12.5px}
  .brandmark{font-size:25px;letter-spacing:4px}

  .hero{padding:8px 0 0}
  .hero-grid{
    min-height:360px;
    grid-template-columns:1.08fr .92fr;
    gap:28px;
    align-items:center;
  }
  .hero-copy{padding:20px 0}
  .hero h1,.product-hero h1{
    font-size:43px;
    line-height:1.04;
    letter-spacing:-1.4px;
    margin:9px 0 12px;
  }
  .hero p,.product-hero p{
    font-size:14px;
    line-height:1.55;
    max-width:660px;
  }
  .hero-points{
    display:grid;
    grid-template-columns:repeat(4,max-content);
    gap:8px;
    margin:15px 0;
  }
  .hero-points span{
    padding:8px 11px;
    font-size:10.5px;
    border-radius:9px;
  }
  .hero-actions{margin-top:16px}

  .hero-visual{height:310px}
  .cad-card{
    width:315px;
    height:238px;
    border-radius:26px;
  }
  .cad-top{font-size:50px}
  .cad-part{width:196px;height:70px}
  .cad-part i{width:104px;height:58px}

  .section{padding:30px 0}
  .section-title{
    margin-bottom:14px;
    display:flex;
    justify-content:space-between;
    align-items:flex-end;
  }
  .section-title h2{font-size:24px;margin:3px 0 0}

  .catalog{
    grid-template-columns:180px 1fr;
    gap:12px;
  }
  .categories{padding:11px;border-radius:11px}
  .categories h3{font-size:12px}
  .categories a{padding:7px 8px;font-size:10.5px}

  .product-grid,.product-grid.wide{
    grid-template-columns:repeat(5,minmax(0,1fr));
    gap:10px;
  }
  .product-card{
    min-height:255px;
    display:flex;
    flex-direction:column;
    border-radius:12px;
  }
  .product-art{
    height:104px;
    flex:0 0 104px;
  }
  .product-art>span{font-size:46px}
  .product-body{
    padding:11px 12px 12px;
    display:flex;
    flex-direction:column;
    flex:1;
  }
  .product-body h3{
    font-size:13.5px;
    margin:6px 0 3px;
    line-height:1.25;
  }
  .product-body p{
    font-size:10px;
    line-height:1.35;
    min-height:28px;
    margin:3px 0 5px;
  }
  .product-price{
    margin-top:auto;
    padding-top:5px;
    font-size:10px;
  }
  .product-price b{font-size:12px}

  .price-strip,.plans-grid{
    gap:12px;
    max-width:1120px;
  }
  .price-card,.payment-card{
    padding:15px;
    border-radius:12px;
  }
  .price-card strong{font-size:23px}
  .price-card ul{font-size:10.5px}
  .payment-card{min-height:210px}

  .benefits{
    margin-top:12px;
    border-radius:12px;
  }
  .benefits>div{
    min-height:82px;
    padding:10px 13px;
  }

  .footer{padding:22px 0}
  .footer-grid{align-items:center}

  /* Admin: đủ gọn để thấy nhiều đơn nhưng vẫn dễ đọc */
  .admin-shell{grid-template-columns:175px 1fr}
  .admin-main{padding:16px 18px}
  .admin-side{padding:12px}
  .admin-side a{padding:8px 9px;font-size:11px}
  th,td{padding:8px 9px;font-size:10.5px}
  .admin-head h1{font-size:22px}

  /* Checkout/payment gọn và sạch */
  .checkout-grid,.payment-layout{
    grid-template-columns:1fr 300px;
    gap:16px;
  }
  .checkout-card,.payment-main,.success-card{
    padding:18px;
  }
  .summary-card{padding:15px}
  .form input,.form textarea,.form select{
    min-height:36px;
    font-size:12px;
  }
}

/* Laptop 1280-1600: ưu tiên 4 app/hàng để tránh card bị quá hẹp */
@media (min-width:1001px) and (max-width:1450px){
  .product-grid,.product-grid.wide{
    grid-template-columns:repeat(4,minmax(0,1fr));
  }
  .shell{width:min(1240px,calc(100% - 30px))}
}

/* Mobile/tablet: dễ bấm, không quá dày */
@media (max-width:1000px){
  .hero h1,.product-hero h1{font-size:34px}
  .section{padding:28px 0}
  .product-grid,.product-grid.wide{gap:12px}
}


/* Quick Key Admin */
.quick-flash{margin:0 0 14px;padding:11px 14px;border-radius:10px;font-weight:700;font-size:12px}
.quick-flash.ok{background:#eafaf1;border:1px solid #b8edcf;color:#137a43}
.quick-flash.error{background:#fff1f1;border:1px solid #ffcaca;color:#b42318}
.quick-result{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:17px 18px;margin:0 0 14px;background:linear-gradient(135deg,#eef8ff,#f5fff9);border:1px solid #b7dff8;border-radius:14px;box-shadow:0 8px 28px rgba(30,91,140,.08)}
.quick-result span{font-size:9px;font-weight:900;letter-spacing:1.4px;color:#1682c4}
.quick-result h2{margin:5px 0 7px;font-size:23px;letter-spacing:.7px;word-break:break-all}
.quick-result p{margin:4px 0;font-size:11px}
.quick-result small{font-size:9px;color:#7c8894}
.quick-grid{align-items:start}
.quick-editor{max-width:620px}
.quick-warning{padding:10px 11px;border-radius:9px;background:#fff8e7;border:1px solid #f5dc99;color:#765b12;font-size:10.5px;line-height:1.45}
.quick-help h3{margin-top:0}
.quick-step{display:flex;align-items:center;gap:10px;padding:10px 0;border-bottom:1px solid #edf1f4}
.quick-step b{width:26px;height:26px;border-radius:50%;display:grid;place-items:center;background:#1687c8;color:#fff;font-size:11px;flex:none}
.quick-step span{font-size:11px;line-height:1.4}
.quick-help .muted{font-size:10px;line-height:1.5;color:#6d7883;margin-top:12px}
@media(max-width:700px){
  .quick-result{align-items:flex-start;flex-direction:column}
  .quick-result h2{font-size:18px}
}