:root{--bg:#f4f5f7;--card:#fff;--ink:#1a1a2e;--muted:#6b7280;--line:#e5e7eb;--accent:#1a1a2e;--ok:#0f7a3a;--warn:#b45309;--err:#b91c1c;--soft:#eef2ff}
*{box-sizing:border-box}
body{margin:0;font:16px/1.45 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--ink)}
a{color:inherit}
.top{display:flex;align-items:center;gap:20px;background:var(--ink);color:#fff;padding:10px 18px;flex-wrap:wrap}
.top .brand{font-weight:700;text-decoration:none;font-size:18px}
.top nav{display:flex;gap:4px;flex-wrap:wrap}
.top nav a{color:#cbd5e1;text-decoration:none;padding:8px 12px;border-radius:8px;font-size:15px}
.top nav a.active,.top nav a:hover{background:#2e2e4a;color:#fff}
.top .who{margin-left:auto;color:#cbd5e1;font-size:14px}
.top .who a{color:#fff}
main{padding:18px;max-width:1400px;margin:0 auto}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px;margin-bottom:18px}
.card.narrow{max-width:640px}
.two-col{display:grid;grid-template-columns:1.4fr 1fr;gap:18px}
@media(max-width:900px){.two-col{grid-template-columns:1fr}}
h1{font-size:22px;margin:0 0 12px}h2{font-size:17px;margin:18px 0 8px}
.muted{color:var(--muted)}.small{font-size:13px}.mono{font-family:ui-monospace,Menlo,Consolas,monospace}
.r{text-align:right}
label{display:block;font-size:14px;color:var(--muted);margin-bottom:4px}
input,select{width:100%;font-size:17px;padding:12px;border:1px solid #cbd5e1;border-radius:8px;background:#fff;color:var(--ink);margin-top:4px}
input:focus,select:focus{outline:2px solid #6366f1;border-color:#6366f1}
input[type=checkbox],input[type=file]{width:auto}
label.check{display:flex;align-items:center;gap:8px;color:var(--ink)}label.check input{width:auto;margin:0}
.stack>*{margin-bottom:12px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
@media(max-width:700px){.grid3{grid-template-columns:1fr}}
.btn{display:inline-block;font-size:16px;padding:12px 18px;border:1px solid #cbd5e1;border-radius:10px;background:#fff;color:var(--ink);text-decoration:none;cursor:pointer;min-height:48px}
.btn:hover{background:#f1f5f9}
.btn.primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn.primary:hover{background:#2e2e4a}
.btn.big{width:100%;font-size:18px;padding:16px}
.btn.small{padding:6px 10px;font-size:14px;min-height:0}
.scan-row{display:flex;gap:10px;margin:12px 0}
.scan-input{font-size:24px;padding:16px;font-family:ui-monospace,Menlo,Consolas,monospace;letter-spacing:1px}
.product-area{min-height:120px}
.product-card{display:flex;gap:16px;padding:12px;background:#fafafa;border:1px solid var(--line);border-radius:10px;margin-top:8px}
.product-media img{width:110px;height:110px;object-fit:contain;background:#fff;border-radius:8px}
.product-media .noimg{width:110px;height:110px;display:flex;align-items:center;justify-content:center;color:var(--muted);background:#fff;border-radius:8px;font-size:13px}
.product-name{font-size:19px;font-weight:600}
.stock-line{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px}
.pill{display:inline-block;padding:4px 10px;border-radius:999px;background:var(--ink);color:#fff;font-size:13px}
.pill.soft{background:var(--soft);color:#3730a3}
.pill.okpill{background:#dcfce7;color:var(--ok)}.pill.warnpill{background:#fef3c7;color:var(--warn)}.pill.errpill{background:#fee2e2;color:var(--err)}
.book-row{display:grid;grid-template-columns:1fr 1fr 2fr auto;gap:12px;align-items:end;margin-top:14px}
@media(max-width:900px){.book-row{grid-template-columns:1fr 1fr}.book-row .btn.big{grid-column:1/-1}}
.flash{padding:10px 14px;border-radius:8px;margin:8px 0;font-size:15px}
.flash.ok{background:#dcfce7;color:var(--ok)}.flash.warn{background:#fef3c7;color:var(--warn)}.flash.err{background:#fee2e2;color:var(--err)}
table{width:100%;border-collapse:collapse}
table.lines th,table.lines td,table.stock th,table.stock td{padding:9px 8px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle;font-size:15px}
table th{color:var(--muted);font-weight:600;font-size:13px}
table th a{text-decoration:none}
tr.undone td{opacity:.45;text-decoration:line-through}
tr.low td{background:#fffbeb}
td.thumb img{width:44px;height:44px;object-fit:contain}
td.pos{color:var(--ok)}td.neg{color:var(--err)}
.toolbar{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.toolbar h1{margin:0}.toolbar .search{max-width:360px;margin:0}
.receipt-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}
.detail-img{max-width:220px;max-height:220px;object-fit:contain;display:block;margin:10px 0}
.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px}
.login{width:100%;max-width:380px}.login h1{text-align:center}
.login label{margin-bottom:12px}