:root{
  --bg:#0b0f14; --card:#101722; --muted:#9bb0c7; --text:#e9f2ff;
  --pri:#4aa3ff; --pri2:#2b7cd4; --line:#1f2a3a; --ok:#34d399; --bad:#fb7185;
  --radius:16px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;background:linear-gradient(180deg,#070a0f, #0b0f14);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial}
img{max-width:100%;display:block;border-radius:14px}
a{color:inherit}

.container{width:min(1100px,92vw);margin:0 auto}
.row{display:flex;align-items:center;justify-content:space-between;gap:12px}

.topbar{position:sticky;top:0;z-index:50;background:rgba(11,15,20,.72);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.topbar .brand{font-weight:800;letter-spacing:.3px;padding:14px 0}
.pill{border:1px solid var(--line);padding:8px 12px;border-radius:999px;background:rgba(16,23,34,.6)}

.hero{padding:28px 0 10px}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}
@media (max-width: 920px){.hero-grid{grid-template-columns:1fr}}

.media{background:rgba(16,23,34,.45);border:1px solid var(--line);border-radius:var(--radius);padding:12px}
.thumbs{margin-top:10px;display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.thumbs img{border-radius:12px;opacity:.9}

.content{background:rgba(16,23,34,.45);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
h1{margin:0 0 8px;font-size:clamp(22px,3.2vw,34px)}
.subtitle{margin:0 0 14px;color:var(--muted)}

.pricebox{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:12px;border:1px solid var(--line);border-radius:14px;background:rgba(16,23,34,.6)}
.price .label{display:block;font-size:12px;color:var(--muted)}
.price .value{font-size:22px;font-weight:800}
.stock{font-size:14px;color:var(--muted)}
.ok{color:var(--ok);font-weight:700}
.bad{color:var(--bad);font-weight:700}

.qty-row{margin:14px 0;display:flex;gap:10px;align-items:center}
.qty{width:86px;background:#0b1220;border:1px solid var(--line);color:var(--text);border-radius:12px;padding:10px 12px;font-size:16px}

.cta-row{display:flex;gap:10px;flex-wrap:wrap}
.btn{border:1px solid var(--line);background:#0b1220;color:var(--text);padding:12px 14px;border-radius:14px;cursor:pointer;font-weight:700}
.btn:hover{border-color:#2d3c54}
.btn.primary{background:linear-gradient(180deg,var(--pri),var(--pri2));border-color:transparent;color:#04101f}
.btn.ghost{background:transparent}
.btn.full{width:100%}

.notice{margin-top:12px;font-size:14px;min-height:18px;color:var(--muted)}
.details{margin-top:18px;border-top:1px solid var(--line);padding-top:14px}
.details ul{margin:8px 0 0 18px;color:var(--muted)}

.checkout{padding:12px 0 26px}
.card{background:rgba(16,23,34,.45);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.muted{color:var(--muted)}
.small{font-size:12px}

.grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media (max-width: 700px){.grid{grid-template-columns:1fr}}
.field label{display:block;font-size:13px;color:var(--muted);margin:0 0 6px}
.field input,.field textarea{
  width:100%;background:#0b1220;border:1px solid var(--line);color:var(--text);
  border-radius:14px;padding:12px 12px;font-size:15px;outline:none
}
.field textarea{min-height:92px;resize:vertical}

.summary{margin:14px 0;padding:12px;border:1px solid var(--line);border-radius:14px;background:rgba(11,18,32,.55);display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}

.footer{border-top:1px solid var(--line);padding:20px 0;margin-top:14px}