:root{--bg:#f6f7fb;--ink:#101828;--muted:#667085;--card:#fff;--accent:#0b6cff;--dark:#101828;--border:#e4e7ec}
*{box-sizing:border-box}body{margin:0;font-family:Inter,Arial,sans-serif;background:var(--bg);color:var(--ink)}
a{text-decoration:none;color:inherit}header{position:sticky;top:0;z-index:10;background:rgba(16,24,40,.97);color:#fff;padding:18px 5%;display:flex;align-items:center;justify-content:space-between}
.logo{font-size:24px;font-weight:900}.logo small{font-size:11px;background:#fff;color:#111827;padding:4px 6px;border-radius:6px}nav{display:flex;gap:22px;font-weight:600}main{width:min(1480px,92%);margin:38px auto}
.hero{padding:64px 0 36px}.eyebrow{font-size:12px;letter-spacing:.14em;font-weight:800;color:var(--accent)}.hero h1{font-size:clamp(44px,7vw,84px);line-height:.94;margin:12px 0 20px;max-width:1000px}.hero p{font-size:20px;color:var(--muted);max-width:780px}
.filters{display:grid;grid-template-columns:2fr 1fr 1fr repeat(3,.7fr) auto auto auto;gap:10px;margin-bottom:30px;background:#fff;padding:16px;border-radius:18px;border:1px solid var(--border)}
input,select,textarea,button{width:100%;padding:13px 14px;border-radius:10px;border:1px solid #d0d5dd;background:#fff;font-size:15px}button,.button{background:var(--dark);color:white;border:0;cursor:pointer;font-weight:700}.check{display:flex;gap:7px;align-items:center;font-size:13px}.check input{width:auto}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.product-card{background:var(--card);border-radius:18px;overflow:hidden;border:1px solid var(--border);transition:.2s}.product-card:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(16,24,40,.08)}
.product-card img,.placeholder{width:100%;height:260px;object-fit:contain;background:#fff}.placeholder,.detail-placeholder{display:grid;place-items:center;font-size:70px}.product-content{padding:20px}.product-content h2{font-size:13px;color:var(--muted);margin:12px 0 3px;text-transform:uppercase;letter-spacing:.04em}.product-content h3{font-size:20px;margin:0 0 14px}.price{font-size:19px;font-weight:900}.offers,.muted{color:var(--muted)}
.tag{display:inline-block;background:#eef4ff;color:#175cd3;padding:6px 8px;border-radius:7px;font-size:10px;font-weight:900;margin-right:5px}.tag.carbon{background:#101828;color:#fff}
.product-detail{display:grid;grid-template-columns:1fr 1.2fr;gap:50px;background:#fff;border-radius:20px;padding:34px;border:1px solid var(--border)}.detail-image,.detail-placeholder{width:100%;height:460px;object-fit:contain}.product-detail h1{font-size:44px;margin:12px 0}
.specs{display:grid;grid-template-columns:repeat(2,1fr);gap:9px;margin:22px 0}.specs div{background:#f8fafc;padding:12px;border-radius:10px;display:flex;justify-content:space-between}.specs span{color:var(--muted)}
.section-title,.admin-head{display:flex;justify-content:space-between;align-items:center;margin:34px 0 16px}.offer{display:grid;grid-template-columns:1fr 1fr auto;align-items:center;gap:20px;background:#fff;padding:18px;border-radius:14px;border:1px solid var(--border);margin:9px 0}.offer small{display:block;color:var(--muted)}.offer-price{display:flex;gap:10px;align-items:center}.old-price{text-decoration:line-through;color:#98a2b3}.promo{background:#ecfdf3;color:#067647;padding:6px 8px;border-radius:7px;font-size:12px;font-weight:800}
.login-box,.form-box{max-width:720px;margin:60px auto;background:#fff;border-radius:18px;padding:30px;border:1px solid var(--border)}.login-box form,.form-box form{display:grid;gap:12px}.form-box textarea{min-height:120px;font-family:monospace}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.stats div{background:#fff;padding:26px;border-radius:15px;border:1px solid var(--border)}.stats strong{display:block;font-size:38px}.stats span{color:var(--muted)}
.admin-actions{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:26px 0}.admin-actions a{background:#fff;padding:22px;border-radius:14px;border:1px solid var(--border)}.admin-actions strong,.admin-actions span{display:block}.admin-actions span{color:var(--muted);font-size:13px;margin-top:6px}
table{width:100%;background:#fff;border-collapse:collapse;border-radius:14px;overflow:hidden;border:1px solid var(--border)}th,td{padding:12px;text-align:left;border-bottom:1px solid #eaecf0;font-size:14px}th{background:#f9fafb}.mini{display:inline-block;padding:7px 9px;border-radius:7px;background:#101828;color:#fff;font-size:12px}
pre{background:#101828;color:#e5e7eb;padding:18px;border-radius:12px;overflow:auto;white-space:pre-wrap;font-size:12px}
@media(max-width:1100px){.grid{grid-template-columns:repeat(3,1fr)}.filters{grid-template-columns:repeat(3,1fr)}.stats,.admin-actions{grid-template-columns:repeat(2,1fr)}}
@media(max-width:760px){nav{display:none}.grid{grid-template-columns:repeat(2,1fr)}.filters{grid-template-columns:1fr 1fr}.product-detail{grid-template-columns:1fr}.product-detail h1{font-size:34px}.offer{grid-template-columns:1fr}.stats,.admin-actions{grid-template-columns:1fr}}
@media(max-width:520px){main{width:94%;margin-top:22px}.grid{grid-template-columns:1fr}.filters{grid-template-columns:1fr}.hero{padding-top:32px}}

textarea {
    min-height: 110px;
}

.admin-actions a:hover,
.button:hover,
.mini:hover {
    opacity: .88;
}

.notice {
    background: #fffaeb;
    border: 1px solid #fedf89;
    padding: 14px 16px;
    border-radius: 10px;
    margin: 12px 0;
}