:root{
  --bg:#0b0e11; --surface:#14181d; --muted:#93a0ae; --text:#e6edf3;
  --accent:#00bcd4; --primary:#0ea5e9; --border:#26303a;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:Inter,Segoe UI,Arial,Helvetica,sans-serif}
img{max-width:100%;display:block}

.top{display:flex;align-items:center;gap:16px;justify-content:space-between;padding:12px 16px;background:#12161b;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}
.top__brand{display:flex;align-items:center;gap:10px}
.logo{font-size:22px}
.steps{display:flex;gap:8px;flex-wrap:wrap}
.step{display:flex;align-items:center;gap:6px;background:#1a2027;border:1px solid var(--border);padding:6px 10px;border-radius:8px;color:#cbd5e1;font-size:13px}
.step span{display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;border-radius:999px;background:#2b3340;color:#fff;font-size:12px}
.step.active{border-color:var(--accent);color:#fff}
.top__actions{display:flex;align-items:center;gap:8px}
.top__actions input{background:#0f1318;border:1px solid var(--border);color:var(--text);padding:8px 10px;border-radius:8px;min-width:260px}
.btn{border:1px solid var(--border);background:#1a2027;color:#e6edf3;padding:8px 12px;border-radius:8px;cursor:pointer}
.btn:hover{border-color:#384554}
.btn.cart{display:inline-flex;align-items:center;gap:6px}

.wrap{display:grid;grid-template-columns:240px 1fr;gap:16px;max-width:1300px;margin:16px auto;padding:0 16px}
.filters{background:#101419;border:1px solid var(--border);border-radius:10px;padding:12px}
.filters h3{margin:0 0 8px;font-size:15px}
.filters label{display:block;font-size:13px;margin:10px 0}
.filters input,.filters select{width:100%;padding:8px;border:1px solid var(--border);border-radius:8px;background:#0f1318;color:var(--text)}
.filters .link{display:inline-block;margin-top:8px;color:#9bd}

.catalog{min-height:400px}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
@media(max-width:1100px){.grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:800px){.grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.wrap{grid-template-columns:1fr}.grid{grid-template-columns:1fr}}

.card{background:var(--surface);border:1px solid var(--border);border-radius:10px;overflow:hidden;display:flex;flex-direction:column}
.card__img{height:160px;background:#0e1116;border-bottom:1px solid var(--border)}
.card__img img{width:100%;height:100%;object-fit:cover}
.card__body{padding:10px;display:flex;flex-direction:column;gap:8px}
.title{margin:0;font-size:15px}
.spec{display:grid;grid-template-columns:90px 1fr;gap:4px;font-size:12px;color:#cbd5e1}
.spec .row{display:contents}
.spec .row span:first-child{color:#93a0ae}
.tiers{border-top:1px dashed var(--border);padding-top:8px}
.tiers__title{font-size:12px;color:#93a0ae;margin-bottom:4px}
.tier{display:flex;justify-content:space-between;font-size:12px;padding:4px 0;border-bottom:1px solid rgba(255,255,255,.03)}
.card__actions{padding:10px;border-top:1px solid var(--border);display:flex;justify-content:flex-end}
.buy{background:var(--primary);border-color:var(--primary);color:#fff}

.pagination{display:flex;gap:6px;justify-content:center;margin:16px 0}
.page-btn{padding:6px 10px;border:1px solid var(--border);background:#1a2027;color:#e6edf3;border-radius:8px;cursor:pointer}
.page-btn.active{border-color:var(--accent);color:#fff}