:root{
  --brand:#4f46e5; --brand-d:#4338ca; --accent:#0ea5e9; --ok:#16a34a; --err:#dc2626;
  --ink:#0f172a; --muted:#64748b; --line:#e2e8f0; --bg:#f8fafc; --card:#fff;
  --r:14px; --shadow:0 1px 2px rgba(15,23,42,.06),0 6px 20px rgba(15,23,42,.06);
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.5}
a{color:var(--brand)}
.wrap{width:min(1120px,100% - 32px);margin-inline:auto}
.muted{color:var(--muted);font-size:.9rem}

/* top bar */
.topbar{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.topbar-in{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{font-weight:800;font-size:1.15rem;color:var(--ink);text-decoration:none;letter-spacing:-.01em}

/* buttons */
.btn{appearance:none;border:0;cursor:pointer;font:inherit;font-weight:600;padding:.6rem 1.1rem;border-radius:10px;background:var(--brand);color:#fff;transition:background .15s,transform .05s}
.btn:hover{background:var(--brand-d)}
.btn:active{transform:translateY(1px)}
.btn:disabled{opacity:.6;cursor:not-allowed}
.btn-ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}
.btn-ghost:hover{background:#f1f5f9}
.btn-block{width:100%;padding:.8rem 1rem}
.btn-cart{display:inline-flex;align-items:center;gap:.5rem}
.badge{background:#fff;color:var(--brand);border-radius:999px;min-width:22px;height:22px;display:inline-grid;place-items:center;font-size:.8rem;padding:0 6px}
.link{background:none;border:0;color:var(--brand);cursor:pointer;font:inherit;padding:0}
.link.danger{color:var(--err)}

/* hero */
.hero{background:linear-gradient(135deg,#4f46e5 0%,#0ea5e9 100%);color:#fff;padding:56px 0 64px}
.hero h1{margin:0 0 .5rem;font-size:clamp(1.8rem,4.5vw,2.8rem);letter-spacing:-.02em;line-height:1.15}
.hero p{margin:0;max-width:640px;font-size:1.08rem;opacity:.95}

/* tabs */
.tabs-bar{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:60px;z-index:20}
.tabs{display:flex;gap:6px;overflow-x:auto;padding:10px 0;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tab{flex:0 0 auto;border:1px solid var(--line);background:#fff;border-radius:999px;padding:.4rem 1rem;cursor:pointer;font:inherit;font-size:.92rem;color:var(--ink)}
.tab[aria-selected="true"]{background:var(--ink);color:#fff;border-color:var(--ink)}

/* sections + cards */
main{padding:28px 0 60px;min-height:50vh}
.sec-title{margin:32px 0 14px;font-size:1.35rem;letter-spacing:-.01em}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);display:flex;flex-direction:column;justify-content:space-between;overflow:hidden}
.card-body{padding:18px 18px 8px}
.card h3{margin:0 0 .3rem;font-size:1.05rem}
.card p{margin:0;color:var(--muted);font-size:.93rem}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:14px 18px 18px}
.price{font-weight:700}
.price small{font-weight:500;color:var(--muted)}
.card.bundle{border-color:#c7d2fe;background:linear-gradient(180deg,#eef2ff,#fff 55%)}
.ribbon{display:inline-block;background:var(--ok);color:#fff;font-size:.75rem;font-weight:700;padding:.15rem .55rem;border-radius:999px;margin-bottom:.5rem}
.incl{margin:.6rem 0 0;padding:0;list-style:none;font-size:.9rem;color:#334155}
.incl li{padding-left:1.2rem;position:relative}
.incl li::before{content:"\2713";position:absolute;left:0;color:var(--ok);font-weight:700}
.was{color:var(--muted);text-decoration:line-through;font-weight:500;font-size:.9rem;margin-right:6px}
.state{padding:40px 0;text-align:center;color:var(--muted)}
.state.error{color:var(--err)}

/* modal */
.modal{position:fixed;inset:0;z-index:50;background:rgba(15,23,42,.55);display:grid;place-items:center;padding:16px;overflow:auto}
.modal-box{position:relative;background:#fff;border-radius:16px;width:min(620px,100%);max-height:calc(100vh - 32px);overflow:auto;padding:26px;box-shadow:0 20px 60px rgba(0,0,0,.3)}
.modal-box h2{margin:0 0 .2rem;font-size:1.3rem;padding-right:30px}
.modal-box .sub{margin:0 0 1rem;color:var(--muted)}
.x{position:absolute;top:12px;right:14px;background:none;border:0;font-size:1.7rem;line-height:1;cursor:pointer;color:var(--muted)}
.x:hover{color:var(--ink)}

/* forms */
.field{margin-bottom:14px}
.field label,.field legend{display:block;font-weight:600;font-size:.92rem;margin-bottom:5px}
.req{color:var(--err)}
input[type=text],input[type=email],input[type=tel],input[type=url],input[type=number],select,textarea{
  width:100%;font:inherit;padding:.6rem .75rem;border:1px solid #cbd5e1;border-radius:10px;background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:2px solid var(--brand);outline-offset:1px;border-color:var(--brand)}
textarea{resize:vertical}
.chk{display:flex;align-items:center;gap:8px;font-weight:500!important}
fieldset{border:0;margin:0 0 14px;padding:0}
.opt{display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:10px;padding:10px 12px;margin-bottom:8px;cursor:pointer}
.opt:has(input:checked){border-color:var(--brand);background:#eef2ff}
.opt span{flex:1}
.opt small{display:block;color:var(--muted)}
.opt em{font-style:normal;font-weight:700}
.bsec{border:1px solid var(--line);border-radius:12px;padding:14px;margin-bottom:14px;background:#f8fafc}
.bsec h4{margin:0 0 10px;font-size:1rem}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.qty{max-width:110px}
.actions{display:flex;gap:10px;justify-content:flex-end;margin-top:18px}

/* drawer */
.overlay{position:fixed;inset:0;background:rgba(15,23,42,.45);z-index:40}
.drawer{position:fixed;top:0;right:0;height:100%;width:min(460px,100%);background:#fff;z-index:45;display:flex;flex-direction:column;transform:translateX(100%);transition:transform .25s ease;box-shadow:-10px 0 40px rgba(0,0,0,.2)}
.drawer.open{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line)}
.drawer-head h2{margin:0;font-size:1.15rem}
.drawer-head .x{position:static}
.drawer-body{flex:1;overflow:auto;padding:18px 20px 28px}
.empty{text-align:center;color:var(--muted);padding:40px 0}
.line{border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin-bottom:10px}
.line-top{display:flex;justify-content:space-between;gap:10px;font-weight:600}
.line small{display:block;color:var(--muted);margin-top:4px;word-break:break-word}
.line-actions{display:flex;gap:14px;margin-top:8px;font-size:.88rem}
.totals{border-top:1px solid var(--line);margin:16px 0;padding-top:12px}
.totals div{display:flex;justify-content:space-between;padding:3px 0}
.totals .grand{font-weight:800;font-size:1.15rem;border-top:1px dashed var(--line);margin-top:6px;padding-top:8px}
.totals .save{color:var(--ok)}
.errs{background:#fef2f2;border:1px solid #fecaca;color:#991b1b;border-radius:10px;padding:10px 14px;margin:0 0 14px;font-size:.92rem}
.errs ul{margin:.3rem 0 0;padding-left:1.1rem}
.hp{position:absolute!important;left:-9999px;width:1px;height:1px;overflow:hidden}
.success{text-align:center;padding:30px 6px}
.success .tick{width:64px;height:64px;border-radius:50%;background:#dcfce7;color:var(--ok);display:grid;place-items:center;font-size:2rem;margin:0 auto 14px}
.success .ono{display:inline-block;background:#f1f5f9;border-radius:8px;padding:.3rem .8rem;font-weight:700;letter-spacing:.03em;margin:.4rem 0}

.footer{border-top:1px solid var(--line);background:#fff;padding:26px 0;text-align:center}
.footer p{margin:.2rem 0}

@media (max-width:520px){
  .row2{grid-template-columns:1fr}
  .modal-box{padding:20px 16px}
  .hero{padding:40px 0 48px}
}