/* ============================================================
   SoftPC – Aero / 3D light-blue theme
   ============================================================ */
:root{
  --blue-50:#eef7ff; --blue-100:#d7ecff; --blue-200:#aed9ff;
  --blue-300:#7cc0ff; --blue-400:#3ea1ff; --blue-500:#0d84f2;
  --blue-600:#0b66c9; --blue-700:#0b3d66; --ink:#0c2233;
  --aero-glass:rgba(255,255,255,.55);
  --shadow-lg:0 20px 40px -12px rgba(13,132,242,.35);
  --shadow-md:0 10px 24px -8px rgba(13,132,242,.30);
  --shadow-sm:0 4px 12px -4px rgba(12,34,51,.20);
  --radius:16px;
}
*{box-sizing:border-box}
body{
  margin:0;font-family:'Segoe UI',system-ui,'Helvetica Neue',Arial,sans-serif;
  color:var(--ink);
  background-color:#eef6ff;
  background-image:
    radial-gradient(1200px 600px at 8% -12%,rgba(120,190,255,.55) 0,transparent 60%),
    radial-gradient(1000px 520px at 112% -6%,rgba(150,205,255,.5) 0,transparent 55%),
    radial-gradient(circle at 20% 30%, rgba(255,255,255,.5) 0 2px, transparent 3px),
    radial-gradient(circle at 70% 70%, rgba(255,255,255,.4) 0 2px, transparent 3px),
    linear-gradient(180deg,#f4faff 0%,#e6f2ff 100%);
  background-size:auto,auto,26px 26px,26px 26px,auto;
  min-height:100vh;
}
a{color:var(--blue-600);text-decoration:none}
a:hover{color:var(--blue-500)}
img{max-width:100%}
.container{max-width:1200px;margin:0 auto;padding:0 16px}

/* Glass panels */
.glass{
  background:linear-gradient(160deg,rgba(255,255,255,.75),rgba(233,244,255,.55));
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid rgba(255,255,255,.7);border-radius:var(--radius);
  box-shadow:var(--shadow-md);
}

/* ---------- Header ---------- */
.topbar{background:linear-gradient(90deg,var(--blue-700),var(--blue-500));color:#fff;font-size:13px}
.topbar .container{display:flex;justify-content:space-between;padding:6px 16px}
.topbar a{color:#eaf5ff}
.header{
  position:sticky;top:0;z-index:50;
  background:linear-gradient(120deg,var(--blue-600),var(--blue-400));
  box-shadow:var(--shadow-md);
}
.header .container{display:flex;align-items:center;gap:18px;padding:12px 16px}
.logo{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:24px;letter-spacing:.5px}
.logo .badge{background:#fff;color:var(--blue-600);border-radius:10px;padding:2px 10px;box-shadow:var(--shadow-sm)}
.searchbar{flex:1;display:flex;background:#fff;border-radius:30px;overflow:hidden;box-shadow:var(--shadow-sm)}
.searchbar input{flex:1;border:0;padding:12px 18px;font-size:15px;outline:none}
.searchbar button{border:0;background:var(--blue-600);color:#fff;padding:0 22px;cursor:pointer;font-weight:600}
.header-actions{display:flex;align-items:center;gap:16px;color:#fff}
.header-actions a{color:#fff;display:flex;align-items:center;gap:6px;font-weight:600}
.cart-btn{position:relative}
.cart-btn .count{position:absolute;top:-8px;right:-10px;background:#ff5a5a;color:#fff;border-radius:20px;font-size:11px;padding:1px 6px;font-weight:700}
.lang-switch a{opacity:.7;font-weight:700}
.lang-switch a.active{opacity:1;text-decoration:underline}

/* ---------- Nav bar with vertical category dropdown ---------- */
.catnav{background:rgba(255,255,255,.72);backdrop-filter:blur(10px);box-shadow:var(--shadow-sm);position:relative;z-index:40}
.catnav .container{display:flex;gap:4px;align-items:stretch;padding:0 16px;flex-wrap:nowrap}
.catnav .qlink{padding:12px 14px;font-weight:600;font-size:14px;color:var(--blue-700);display:inline-flex;align-items:center;gap:6px;white-space:nowrap;border-radius:0}
.catnav .qlink:hover{background:var(--blue-100)}
.catnav .qlink.build{color:#0b66c9;font-weight:800}
.catnav .qlink.hot{color:#e23b3b}

/* dropdown trigger */
.cat-dropdown{position:relative}
.cat-btn{height:100%;border:0;cursor:pointer;font-weight:800;font-size:14.5px;color:#fff;padding:12px 18px;
  background:linear-gradient(180deg,var(--blue-500),var(--blue-600));
  display:flex;align-items:center;gap:10px;box-shadow:var(--shadow-sm)}
.cat-btn .bars{font-size:16px}
.cat-btn .caret{transition:.2s;font-size:12px}
.cat-dropdown:hover .caret,.cat-dropdown.open .caret{transform:rotate(180deg)}

/* the vertical panel (hover on desktop, click toggles .open on mobile) */
.cat-panel{position:absolute;top:100%;left:0;width:290px;background:#fff;border-radius:0 0 14px 14px;
  box-shadow:var(--shadow-lg);display:none;z-index:60;overflow:hidden;border:1px solid rgba(174,217,255,.5);border-top:0}
.cat-dropdown:hover .cat-panel,.cat-dropdown.open .cat-panel{display:block}

/* shared vertical category list (dropdown + homepage column) */
.cat-menu a{display:flex;align-items:center;gap:12px;padding:11px 16px;color:var(--ink);font-weight:600;font-size:14px;border-bottom:1px solid #eef4fb;transition:.15s}
.cat-menu a:last-child{border-bottom:0}
.cat-menu a:hover{background:linear-gradient(90deg,var(--blue-50),transparent);color:var(--blue-600);padding-left:22px}
.cat-menu a .ic{font-size:19px;width:24px;text-align:center;flex:0 0 auto}
.cat-menu a .nm{flex:1}
.cat-menu a .ar{color:var(--blue-300);font-weight:800}
.cat-menu a:hover .ar{color:var(--blue-500)}

/* homepage: fixed vertical menu beside the hero (phongvu style) */
.home-top{display:grid;grid-template-columns:270px 1fr;gap:18px;margin:18px 0;align-items:stretch}
.home-cats{background:#fff;border-radius:16px;box-shadow:var(--shadow-sm);overflow:hidden;align-self:stretch;border:1px solid rgba(174,217,255,.5)}
.home-cats .cat-menu a{padding-top:9.5px;padding-bottom:9.5px}
.home-top .hero{margin:0;height:100%}

/* ---------- Hero ---------- */
.hero{margin:22px 0;border-radius:22px;overflow:hidden;position:relative;
  background:linear-gradient(120deg,var(--blue-500),var(--blue-300));
  box-shadow:var(--shadow-lg);color:#fff;padding:44px 40px}
.hero h1{font-size:40px;margin:0 0 10px;text-shadow:0 3px 10px rgba(11,61,102,.4)}
.hero p{font-size:18px;opacity:.95;max-width:560px}
.hero .btn{margin-top:18px}
.hero::after{content:"🖥️";position:absolute;right:40px;top:50%;transform:translateY(-50%);font-size:120px;opacity:.35}

/* ---------- Buttons ---------- */
.btn{display:inline-block;border:0;cursor:pointer;font-weight:700;font-size:15px;
  padding:12px 22px;border-radius:12px;color:#fff;
  background:linear-gradient(180deg,var(--blue-400),var(--blue-600));
  box-shadow:0 6px 16px -4px rgba(13,132,242,.6),inset 0 1px 0 rgba(255,255,255,.5);
  transition:.15s}
.btn:hover{transform:translateY(-2px);color:#fff;box-shadow:0 10px 22px -6px rgba(13,132,242,.7)}
.btn:active{transform:translateY(0)}
.btn-outline{background:#fff;color:var(--blue-600);border:1px solid var(--blue-300);box-shadow:var(--shadow-sm)}
.btn-danger{background:linear-gradient(180deg,#ff7a7a,#e23b3b)}
.btn-success{background:linear-gradient(180deg,#4bd08b,#12a45c)}
.btn-sm{padding:7px 12px;font-size:13px;border-radius:9px}
.btn-ghost{background:transparent;color:var(--blue-600);box-shadow:none}

/* ---------- Section titles ---------- */
.section{margin:30px 0}
.section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.section-head h2{margin:0;font-size:22px;color:var(--blue-700)}
.section-head .tag{background:linear-gradient(90deg,#ff6a6a,#ff9a3c);color:#fff;padding:4px 12px;border-radius:20px;font-size:12px;font-weight:700}

/* ---------- Product grid ---------- */
.grid{display:grid;gap:18px}
.grid.cards{grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}
.pcard{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);
  transition:.2s;display:flex;flex-direction:column;border:1px solid rgba(174,217,255,.5)}
.pcard:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.pcard .thumb{aspect-ratio:1;background:linear-gradient(160deg,#f4faff,#e3f1ff);display:flex;align-items:center;justify-content:center;position:relative}
.pcard .thumb img{width:78%;object-fit:contain;filter:drop-shadow(0 12px 18px rgba(13,132,242,.25))}
.pcard .badge-hot{position:absolute;top:10px;left:10px;background:linear-gradient(90deg,#ff5a5a,#ff8a3c);color:#fff;font-size:11px;font-weight:700;padding:3px 9px;border-radius:8px}
.pcard .badge-off{position:absolute;top:10px;right:10px;background:var(--blue-700);color:#fff;font-size:12px;font-weight:800;padding:3px 8px;border-radius:8px}
.pcard .body{padding:12px 14px;display:flex;flex-direction:column;gap:6px;flex:1}
.pcard .brand{font-size:11px;color:var(--blue-500);font-weight:700;text-transform:uppercase}
.pcard .name{font-size:14px;font-weight:600;line-height:1.35;color:var(--ink);min-height:38px}
.pcard .price{font-size:18px;font-weight:800;color:#e23b3b}
.pcard .old{font-size:13px;color:#99aabb;text-decoration:line-through}
.pcard .foot{margin-top:auto;display:flex;gap:8px}

/* ---------- Product detail ---------- */
.pd{display:grid;grid-template-columns:1.1fr 1fr;gap:26px;margin:22px 0}
.pd .gallery .main{background:#fff;border-radius:var(--radius);aspect-ratio:1;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-sm);padding:20px}
.pd .gallery .main img{max-height:100%;object-fit:contain}
.pd .thumbs{display:flex;gap:10px;margin-top:12px}
.pd .thumbs img{width:70px;height:70px;object-fit:contain;background:#fff;border-radius:10px;padding:6px;box-shadow:var(--shadow-sm);cursor:pointer;border:2px solid transparent}
.pd .thumbs img.active{border-color:var(--blue-400)}
.pd h1{font-size:26px;margin:0 0 10px;color:var(--ink)}
.pd .price-box{background:linear-gradient(160deg,#fff5f5,#ffecec);border-radius:14px;padding:16px 18px;margin:14px 0}
.pd .price-box .now{font-size:30px;font-weight:800;color:#e23b3b}
.pd .price-box .was{color:#889;text-decoration:line-through;margin-left:10px}
.spec-table{width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden;box-shadow:var(--shadow-sm)}
.spec-table th,.spec-table td{padding:11px 14px;border-bottom:1px solid #eef4fb;text-align:left;font-size:14px}
.spec-table th{width:40%;background:var(--blue-50);color:var(--blue-700);font-weight:600}
.qrbox{display:flex;align-items:center;gap:14px;margin-top:16px;background:#fff;padding:12px;border-radius:12px;box-shadow:var(--shadow-sm)}
.qrbox img{width:96px;height:96px}

/* ---------- Footer (rich, editable) ---------- */
.footer{margin-top:44px;background:
  radial-gradient(600px 300px at 100% 0,rgba(255,255,255,.08),transparent 60%),
  linear-gradient(120deg,#0b3d66,#0b66c9);color:#dbeeff;padding:34px 0 0}
.footer .cols{display:grid;grid-template-columns:repeat(5,1fr);gap:26px}
.footer h4{color:#fff;margin:0 0 12px;font-size:15px;letter-spacing:.3px}
.footer a{color:#c3ddff;display:block;padding:3px 0;font-size:13.5px;transition:.15s}
.footer a:hover{color:#fff;padding-left:3px}
.footer .contact-line{font-size:13.5px;color:#dbeeff;margin:2px 0}
.footer .hot{color:#7cc0ff;font-weight:700}
.footer .social a{display:flex;align-items:center;gap:8px}
.footer .pay-row{display:grid;grid-template-columns:1fr 2fr;gap:30px;margin-top:26px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14)}
.footer .pay-methods{display:flex;gap:16px;flex-wrap:wrap}
.footer .pay-methods .pm{background:rgba(255,255,255,.9);color:var(--blue-700);border-radius:10px;padding:8px 10px;text-align:center;min-width:70px;font-size:12px;font-weight:600;box-shadow:var(--shadow-sm)}
.footer .pay-methods .pm .ic{font-size:22px;display:block}
.footer .banks{display:flex;flex-wrap:wrap;gap:7px}
.footer .banks span{background:rgba(255,255,255,.92);color:#0b3d66;border-radius:6px;padding:4px 9px;font-size:11px;font-weight:700;letter-spacing:.2px}
.footer .company{background:rgba(255,255,255,.06);margin-top:26px}
.footer .company .container{display:grid;grid-template-columns:1.3fr 1.4fr auto;gap:26px;padding:22px 16px}
.footer .company h5{color:#fff;margin:0 0 8px;font-size:14px}
.footer .company p{font-size:12.5px;color:#c3ddff;margin:3px 0;line-height:1.5}
.footer .badges{display:flex;flex-direction:column;gap:10px;align-items:flex-start}
.footer .badges .b{background:rgba(255,255,255,.92);color:#0b3d66;border-radius:8px;padding:8px 12px;font-size:11px;font-weight:800;display:flex;align-items:center;gap:8px}
.footer .copy{text-align:center;padding:14px;font-size:12.5px;color:#a9cdf2;border-top:1px solid rgba(255,255,255,.12)}

/* ---------- Auth ---------- */
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}
.auth-card{width:100%;max-width:400px;padding:34px}
.auth-card h1{text-align:center;color:var(--blue-700);margin:0 0 6px}
.auth-card p.sub{text-align:center;color:#789;margin:0 0 22px}
.field{margin-bottom:16px}
.field label{display:block;font-weight:600;margin-bottom:6px;color:var(--blue-700);font-size:14px}
.field input,.field select,.field textarea{width:100%;padding:11px 14px;border:1px solid var(--blue-200);border-radius:10px;font-size:15px;background:rgba(255,255,255,.9);outline:none}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--blue-400);box-shadow:0 0 0 3px rgba(62,161,255,.2)}

/* ---------- Status badges (storefront) ---------- */
.badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:12px;font-weight:700}
.badge.new,.badge.processing{background:#dbeafe;color:#1d4ed8}
.badge.shipping{background:#fef3c7;color:#b45309}
.badge.delivered,.badge.completed{background:#dcfce7;color:#15803d}
.badge.cancelled{background:#fee2e2;color:#b91c1c}

/* ---------- Alerts ---------- */
.alert{padding:12px 16px;border-radius:10px;margin-bottom:14px;font-weight:600}
.alert-success{background:#e2f8ee;color:#0a7a45;border:1px solid #b6ebd0}
.alert-error{background:#ffecec;color:#c0392b;border:1px solid #ffc9c9}

/* ---------- Cart ---------- */
.cart-table{width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden;box-shadow:var(--shadow-sm)}
.cart-table th,.cart-table td{padding:12px 14px;border-bottom:1px solid #eef4fb;text-align:left}
.cart-table img{width:54px}
.qty-input{width:64px;padding:6px;border:1px solid var(--blue-200);border-radius:8px;text-align:center}

@media(max-width:900px){
  .pd{grid-template-columns:1fr}
  .hero::after{display:none}
  .home-top{grid-template-columns:1fr}
  .home-cats{display:none}
  .footer .cols{grid-template-columns:1fr 1fr}
  .footer .pay-row{grid-template-columns:1fr}
  .footer .company .container{grid-template-columns:1fr}
}