:root{
  --brand:#c9722a; --brand-dark:#9c531b; --ink:#20242b; --muted:#6b7280;
  --bg:#f6f5f2; --card:#ffffff; --line:#e6e2da; --good:#1c7c3f; --bad:#c0392b;
  --radius:12px; --shadow:0 2px 10px rgba(30,25,15,.06);
  font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);}
a{color:inherit}
header.site{display:flex;align-items:center;justify-content:space-between;padding:16px 28px;background:#1b1d22;color:#fff;flex-wrap:wrap;gap:10px}
header.site .brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:.3px}
header.site .brand span.tag{background:var(--brand);color:#fff;font-size:11px;padding:3px 8px;border-radius:20px;font-weight:700;letter-spacing:.5px}
header.site nav a{color:#d8d8d8;text-decoration:none;margin-left:18px;font-size:14px}
header.site nav a:hover{color:#fff}
.hero{background:linear-gradient(135deg,#232323 0%,#3a2a1c 60%,var(--brand-dark) 100%);color:#fff;padding:48px 28px 60px;text-align:center}
.hero h1{font-size:clamp(26px,4vw,42px);margin:0 0 10px}
.hero p{color:#e8e0d5;max-width:680px;margin:0 auto;font-size:16px}
.wrap{max-width:1100px;margin:0 auto;padding:0 20px}
.calc-shell{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);margin:-36px auto 40px;max-width:1100px;padding:22px;border:1px solid var(--line)}
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;margin-bottom:18px}
.cat-btn{border:1px solid var(--line);background:#fff;border-radius:10px;padding:14px 8px;text-align:center;cursor:pointer;font-size:13px;font-weight:600;transition:.15s}
.cat-btn:hover{border-color:var(--brand);background:#fdf6ee}
.cat-btn.active{background:var(--brand);border-color:var(--brand);color:#fff}
.cat-btn .ic{font-size:26px;display:block;margin-bottom:6px}
table{border-collapse:collapse;width:100%}
.item-table th,.item-table td{padding:9px 8px;border-bottom:1px solid var(--line);font-size:13.5px;text-align:left}
.item-table th{color:var(--muted);font-weight:700;font-size:11.5px;text-transform:uppercase;letter-spacing:.4px}
.item-table input[type=number]{width:80px;padding:6px 8px;border:1px solid var(--line);border-radius:6px;font-size:13px}
.badge{display:inline-block;padding:2px 8px;border-radius:20px;font-size:11px;font-weight:700}
.badge.Economy{background:#eef2f5;color:#456}
.badge.Standard{background:#eaf3ea;color:var(--good)}
.badge.Premium{background:#fdf0e2;color:var(--brand-dark)}
.badge.Luxury{background:#f7e6f0;color:#96285f}
.summary{position:sticky;bottom:0;background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px 18px;margin-top:14px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;box-shadow:0 -4px 14px rgba(0,0,0,.05)}
.summary .total{font-size:22px;font-weight:800;color:var(--brand-dark)}
.btn{display:inline-block;background:var(--brand);color:#fff;border:none;padding:10px 18px;border-radius:8px;font-weight:700;cursor:pointer;font-size:14px;text-decoration:none}
.btn:hover{background:var(--brand-dark)}
.btn.light{background:#fff;color:var(--ink);border:1px solid var(--line)}
.btn.danger{background:var(--bad)}
.btn.small{padding:6px 12px;font-size:12.5px}
.section-title{font-size:19px;font-weight:800;margin:34px 0 14px}
.material-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px;margin-bottom:40px}
.material-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px}
.material-card .name{font-weight:700;font-size:14px}
.material-card .price{color:var(--brand-dark);font-weight:800;font-size:17px;margin-top:4px}
.material-card .meta{color:var(--muted);font-size:12px;margin-top:2px}
footer.site{padding:26px 20px;text-align:center;color:var(--muted);font-size:13px;border-top:1px solid var(--line);margin-top:30px}
.modal-bg{position:fixed;inset:0;background:rgba(0,0,0,.45);display:flex;align-items:center;justify-content:center;z-index:50;padding:16px}
.modal{background:#fff;border-radius:12px;max-width:420px;width:100%;padding:24px}
.modal h3{margin-top:0}
.modal input,.modal textarea,.modal select{width:100%;padding:9px 10px;border:1px solid var(--line);border-radius:7px;margin:5px 0 12px;font-size:14px}
.modal label{font-size:12.5px;font-weight:700;color:var(--muted)}

/* ---------------- Admin ---------------- */
body.admin{background:#f1efe9}
.admin-header{display:flex;align-items:center;justify-content:space-between;background:#1b1d22;color:#fff;padding:12px 20px}
.admin-header .brand{font-weight:800}
.admin-layout{display:flex;min-height:calc(100vh - 54px)}
.admin-sidebar{width:200px;background:#24262c;color:#cfd0d4;padding:14px 0;flex-shrink:0}
.admin-sidebar button{display:block;width:100%;text-align:left;background:none;border:none;color:inherit;padding:11px 20px;font-size:13.5px;cursor:pointer}
.admin-sidebar button:hover{background:#2f323a}
.admin-sidebar button.active{background:var(--brand);color:#fff;font-weight:700}
.admin-main{flex:1;padding:22px;overflow-x:auto}
.card{background:#fff;border-radius:10px;border:1px solid var(--line);padding:18px;margin-bottom:18px}
.kpi-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin-bottom:20px}
.kpi{background:#fff;border-radius:10px;border:1px solid var(--line);padding:16px}
.kpi .num{font-size:26px;font-weight:800;color:var(--brand-dark)}
.kpi .lbl{color:var(--muted);font-size:12.5px;margin-top:3px}
.admin-table{width:100%;border-collapse:collapse}
.admin-table th,.admin-table td{padding:9px;border-bottom:1px solid var(--line);font-size:13.5px;text-align:left}
.admin-table th{background:#faf9f6;font-size:11.5px;text-transform:uppercase;color:var(--muted)}
.toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px;flex-wrap:wrap;gap:10px}
.login-shell{max-width:360px;margin:80px auto;background:#fff;border-radius:12px;padding:30px;box-shadow:var(--shadow)}
.login-shell h1{font-size:20px;margin-bottom:4px}
.login-shell .sub{color:var(--muted);font-size:13px;margin-bottom:20px}
.err{color:var(--bad);font-size:13px;margin-top:8px}
@media(max-width:720px){.admin-sidebar{width:64px}.admin-sidebar button{text-align:center;font-size:10px;padding:10px 4px}}