:root{--bg:#f7f8fb;--text:#172033;--muted:#64748b;--brand:#0f766e;--dark:#0f172a;--card:#fff;--danger:#dc2626}*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text)}a{text-decoration:none;color:inherit}.container{max-width:1180px;margin:0 auto;padding:0 20px}.header{background:#fff;border-bottom:1px solid #e5e7eb;position:-webkit-sticky;position:sticky;top:0;z-index:10}.header-inner{height:72px;display:flex;align-items:center;justify-content:space-between}.logo{font-weight:800;font-size:24px;color:var(--brand)}.nav{display:flex;gap:22px;font-size:14px;color:#334155}.button{display:inline-flex;padding:12px 18px;background:var(--brand);color:#fff;border-radius:999px;font-weight:700;border:0;cursor:pointer}.button.secondary{background:#e2e8f0;color:#0f172a}.hero{background:linear-gradient(135deg,#0f172a,#0f766e);color:#fff;padding:90px 0}.hero h1{font-size:52px;line-height:1.1;max-width:780px;margin:0 0 18px}.hero p{font-size:19px;max-width:720px;color:#dbeafe}.section{padding:70px 0}.section h1{font-size:42px}.section h2{font-size:34px;margin:0 0 18px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));grid-gap:22px;gap:22px}.card{background:var(--card);border-radius:20px;padding:24px;box-shadow:0 8px 24px rgba(15,23,42,.06)}.placeholder{height:190px;background:linear-gradient(135deg,#e2e8f0,#cbd5e1);border-radius:16px;display:flex;align-items:center;justify-content:center;color:#475569;font-weight:700;margin-bottom:16px}.muted{color:var(--muted)}.spec-table{width:100%;border-collapse:collapse}.spec-table td{border-bottom:1px solid #e5e7eb;padding:12px}.footer{background:var(--dark);color:#cbd5e1;padding:42px 0;margin-top:60px}.footer strong{color:#fff}.admin-layout{display:flex;min-height:100vh}.sidebar{width:260px;background:#0f172a;color:#fff;padding:24px}.sidebar a{display:block;padding:10px 0;color:#cbd5e1}.admin-main{flex:1 1;padding:32px}.table-card{background:#fff;border-radius:18px;padding:24px;overflow:auto}.admin-table{width:100%;border-collapse:collapse}.admin-table td,.admin-table th{border-bottom:1px solid #e5e7eb;padding:12px;text-align:left}.form{display:grid;grid-gap:14px;gap:14px;max-width:760px}.input,.select,.textarea{width:100%;padding:12px 14px;border:1px solid #cbd5e1;border-radius:12px;background:#fff}.textarea{min-height:130px}.success{background:#ecfdf5;border:1px solid #86efac;border-radius:12px;color:#166534}.error,.success{padding:14px 16px}.error{background:#fef2f2;border:1px solid #fecaca;border-radius:12px;color:#991b1b}