:root{
  --ink:#1c1c1e; --ink-2:#2f2f31; --paper:#ececea; --card:#fff;
  --line:#d6d4d1; --accent:#a83232; --accent-2:#efe3e2;
}
*{box-sizing:border-box;}
body{margin:0;font-family:'Segoe UI',Arial,sans-serif;background:var(--paper);color:#212121;}
header{background:var(--ink);color:#fff;padding:14px 28px;display:flex;justify-content:space-between;align-items:center;border-bottom:4px solid var(--accent);}
.header-brand{display:flex;align-items:center;gap:14px;}
.header-brand img{height:38px;width:auto;display:block;background:#fff;border-radius:3px;padding:3px 6px;}
header h1{margin:0;font-size:18px;font-weight:600;}
#user-badge{font-size:12px;color:#cfcfcf;}
.screen{max-width:920px;margin:0 auto;padding:0 24px;}
.login-card{max-width:340px;margin:60px auto;background:var(--card);border:1px solid var(--line);border-radius:6px;padding:26px;}
.login-card h2{margin-top:0;color:var(--ink);}
nav{display:flex;gap:2px;background:var(--ink-2);padding:0 24px;}
nav button{background:transparent;border:none;color:#d8d8d8;padding:12px 18px;font-size:13px;cursor:pointer;border-bottom:3px solid transparent;}
nav button.active{color:#fff;border-bottom:3px solid var(--accent);}
main{max-width:920px;margin:0 auto;padding:24px;}
.panel{display:none;} .panel.active{display:block;}
.card{background:var(--card);border:1px solid var(--line);border-radius:6px;padding:20px;margin-bottom:18px;}
.card h2{margin:0 0 14px;font-size:16px;color:var(--ink);border-bottom:1px solid var(--line);padding-bottom:10px;}
.field-row{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:12px;}
.field{flex:1;min-width:150px;margin-bottom:12px;}
.field label{display:block;font-size:12px;color:#555;margin-bottom:4px;font-weight:600;}
.field input,.field select{width:100%;padding:9px;border:1px solid #c3c0b6;border-radius:4px;font-size:14px;}
button.calc{background:var(--ink);color:#fff;border:none;padding:10px 22px;border-radius:4px;cursor:pointer;font-weight:600;}
button.calc:hover{background:var(--ink-2);}
.add-btn{background:transparent;border:1px dashed #999;color:#555;padding:8px 14px;border-radius:4px;cursor:pointer;margin-top:4px;}
.repeatable-row{display:grid;grid-template-columns:2fr 1fr auto;gap:10px;align-items:end;margin-bottom:10px;}
.remove-btn{background:#fff;border:1px solid #c3c0b6;color:#a33;border-radius:4px;padding:8px;cursor:pointer;height:38px;}
.result-box{margin-top:14px;padding:16px;background:var(--ink);color:#fff;border-radius:4px;}
.result-box .final{font-size:24px;font-weight:700;}
.result-box .tag{display:block;font-size:11px;color:#d8d8d8;text-transform:uppercase;}
.catalog-note{margin-top:10px;font-size:12px;color:#6b6b63;border-left:3px solid var(--accent);padding:6px 10px;background:var(--accent-2);}
.alt-option{margin-top:8px;font-size:12px;color:#4a4a4a;border-left:3px solid #9a9a9a;padding:6px 10px;background:#f0f0ef;}
.alt-option strong{color:#222;}
.err{margin-top:10px;padding:10px 14px;background:#fbeaea;border:1px solid #e3b3b3;color:#8a2b2b;border-radius:4px;font-size:13px;}
.totals-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-top:14px;}
.metric{background:#fbfaf7;border:1px solid var(--line);border-radius:4px;padding:12px;}
.metric .m-label{font-size:11px;color:#888;text-transform:uppercase;}
.metric .m-val{font-size:19px;font-weight:700;color:var(--ink);margin-top:4px;}
table.admin{width:100%;border-collapse:collapse;font-size:13px;}
table.admin th{background:var(--accent-2);color:var(--ink);text-align:left;padding:8px;font-size:12px;}
table.admin td{padding:7px 8px;border-bottom:1px solid var(--line);}
table.admin input{padding:5px;font-size:13px;width:80px;}
.admin-actions{margin-top:10px;display:flex;gap:8px;}
.small-btn{background:#fff;border:1px solid #c3c0b6;border-radius:4px;padding:6px 12px;font-size:12px;cursor:pointer;}
footer{text-align:center;font-size:11px;color:#999;padding:20px;}