:root{--bg:#f5f6f8;--card:#fff;--txt:#1c1f24;--muted:#6b7280;--line:#e2e5ea;--pri:#1f5fbf;--ok:#15803d;--err:#b91c1c;--seg:#b45309}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--txt);font-size:16px}
.oculto{display:none!important}
.muted{color:var(--muted)}
.small{font-size:13px}
.error{color:var(--err);min-height:1.2em}
.ok{color:var(--ok);min-height:1.2em}
button,input,select{font:inherit;border-radius:8px;border:1px solid var(--line);padding:10px 12px;background:#fff;color:var(--txt)}
button{cursor:pointer;background:#fff}
button.primario{background:var(--pri);color:#fff;border-color:var(--pri)}
button.grande{width:100%;padding:16px;font-size:18px;margin-top:8px}
button.link{border:none;background:none;color:var(--pri);padding:4px}
button.peligro{color:var(--err)}
input,select{width:100%}
label{display:flex;flex-direction:column;gap:4px;font-size:13px;color:var(--muted);flex:1}
label input,label select{font-size:16px;color:var(--txt)}
.fila{display:flex;gap:8px;align-items:flex-end;margin:8px 0;flex-wrap:wrap}
.fila>*{flex:1;min-width:120px}
.fila>button{flex:0 0 auto}

/* login */
.login-card{max-width:360px;margin:12vh auto;background:var(--card);padding:28px;border-radius:14px;box-shadow:0 4px 20px rgba(0,0,0,.06);display:flex;flex-direction:column;gap:12px;text-align:center}
.login-card h1{margin:0;font-size:22px}
.login-card input{text-align:center;font-size:24px;letter-spacing:6px}

/* app */
header{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background:#fff;border-bottom:1px solid var(--line)}
header span{display:block;font-size:12px}
#tabs{display:flex;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
#tabs button{flex:1;border:none;border-radius:0;padding:12px 4px;border-bottom:3px solid transparent;font-size:14px}
#tabs button.activo{border-bottom-color:var(--pri);color:var(--pri);font-weight:600}
.tab{padding:14px 16px;max-width:900px;margin:0 auto}

/* conteo */
.scan-box{display:flex;gap:8px;margin-top:8px}
.scan-box input{font-size:20px;padding:14px}
.scan-box button{flex:0 0 56px;font-size:24px}
#cam-reader{width:100%;max-width:420px;margin:8px auto;border-radius:10px;overflow:hidden}
.producto{display:flex;gap:12px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px;margin-top:10px}
.producto img{width:110px;height:140px;object-fit:cover;border-radius:8px;background:#eee;flex:0 0 110px}
.producto img.sin{display:none}
.p-ref{font-weight:700;font-size:18px}
.p-datos{display:flex;flex-direction:column;gap:3px;min-width:0}
.rapidos{display:flex;gap:6px;margin:8px 0}
.rapidos button{flex:1;padding:12px 0;font-weight:600}

/* listas */
.item{display:flex;gap:10px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px;margin:6px 0}
.item img{width:48px;height:60px;object-fit:cover;border-radius:6px;background:#eee}
.item .cuerpo{flex:1;min-width:0}
.item .cant{font-weight:700;font-size:20px;min-width:48px;text-align:right}
.badge{display:inline-block;font-size:11px;padding:2px 6px;border-radius:6px;background:#eef2f7;color:var(--muted);margin-left:4px}
.badge.segunda{background:#fef3c7;color:var(--seg)}

/* reporte */
table{width:100%;border-collapse:collapse;background:#fff;font-size:13px}
th,td{border-bottom:1px solid var(--line);padding:8px 6px;text-align:left;vertical-align:top}
th{background:#f0f2f5;position:sticky;top:48px}
td.num,th.num{text-align:right}
td.neg{color:var(--err)} td.pos{color:var(--ok)}
.tabla-wrap{overflow:auto;max-height:70vh;border:1px solid var(--line);border-radius:10px}

/* admin */
h3{margin:22px 0 6px;font-size:16px}
.log{font-family:ui-monospace,Menlo,monospace;font-size:12px;background:#fff;border:1px solid var(--line);border-radius:8px;padding:8px;max-height:160px;overflow:auto;white-space:pre-wrap;margin-top:6px}
.log:empty{display:none}

/* cajas */
.caja-cab{display:flex;justify-content:space-between;align-items:center;background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin-bottom:10px}
.caja-num{font-size:22px;font-weight:700}
.caja-tot{font-size:28px;font-weight:700;color:var(--pri);text-align:right}
.caja-tot small{display:block;font-size:11px;color:var(--muted);font-weight:400}
#buscar{font-size:17px;padding:13px}
#resultados .item{cursor:pointer}
#resultados .item:active{background:#eef2f7}
table.tallas{margin:8px 0}
table.tallas input{width:72px;text-align:center;font-size:17px;padding:6px}
table.tallas td{padding:6px 4px}
table.tallas th{position:static}
.linea{display:flex;gap:8px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:10px;padding:8px 10px;margin:5px 0}
.linea img{width:40px;height:50px;object-fit:cover;border-radius:5px;background:#eee}
.linea .cuerpo{flex:1;min-width:0}
.linea input{width:64px;text-align:center;padding:6px}
.estado{font-size:11px;padding:2px 7px;border-radius:6px;background:#dcfce7;color:#166534}
.estado.cerrada{background:#e5e7eb;color:#374151}

/* pestaña cajas */
.resumen{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:4px 0 10px}
.resumen div{background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px;text-align:center}
.resumen b{display:block;font-size:22px;color:var(--pri)}
.resumen span{font-size:11px;color:var(--muted)}
.galeria{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;margin-top:10px}
.tarjeta{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.tarjeta img{width:100%;height:170px;object-fit:cover;background:#eee;display:block}
.tarjeta .sinfoto{height:170px;background:#eef2f7;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:12px}
.tarjeta .t-ref{font-weight:700;padding:6px 8px 0}
.tarjeta .t-desc{font-size:11px;color:var(--muted);padding:0 8px;min-height:28px}
.tarjeta .t-tallas{display:flex;flex-wrap:wrap;gap:4px;padding:6px 8px 8px}
.tarjeta .t-tallas span{background:#eef2f7;border-radius:6px;padding:2px 7px;font-size:13px}
.tarjeta .t-tallas b{color:var(--pri)}
.item.caja-row{cursor:pointer}
@media (max-width:600px){.resumen{grid-template-columns:repeat(2,1fr)}}

/* stock */
.tarjeta table{width:100%;border-collapse:collapse;font-size:12px;margin:0}
.tarjeta td,.tarjeta th{padding:3px 6px;border-bottom:1px solid var(--line)}
.tarjeta th{background:#f7f8fa;font-weight:600;position:static}
.tarjeta .t-tot{display:flex;justify-content:space-between;padding:6px 8px;font-size:12px;background:#f7f8fa}
.tarjeta .t-tot b{font-size:15px}
.ok-txt{color:var(--ok)} .err-txt{color:var(--err)}
.sinfoto-mini{width:110px;height:140px;flex:0 0 110px;border-radius:8px;background:#eef2f7;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:12px}
.producto img{width:140px;height:180px;flex-basis:140px}
.sinfoto-mini{width:140px;height:180px;flex-basis:140px}