:root{
  --bg:#e9ebee; --card:#fff; --ink:#1b1f26; --muted:#5f6670; --line:#d5d9df;
  --brand:#1b1f26; --brand-ink:#fff; --accent:#c8102e;  /* cambia --brand por el color de la tienda */ --green:#1f7a4d; --green-bg:#e3f4ea;
  --amber:#9a6400; --amber-bg:#fff4d6; --red:#e2211c; --red-bg:#fde8e8;
  --radius:8px; --shadow:0 1px 2px rgba(0,0,0,.06),0 6px 18px rgba(0,0,0,.05);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.4 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:inherit}
button,input,select,textarea{font:inherit}
h1,h2,h3{margin:0 0 .5rem;line-height:1.2}
.topbar{position:sticky;top:0;z-index:20;background:var(--brand);color:var(--brand-ink);display:flex;align-items:center;gap:.75rem;padding:.6rem .9rem;box-shadow:var(--shadow)}
.topbar .brand{flex:1;display:flex;align-items:center;gap:.6rem;min-width:0}
.topbar .logo{background:#fff;border-radius:4px;padding:4px 8px;display:flex;align-items:center;height:36px}
.topbar .logo img{height:100%;width:auto;display:block}
.topbar .brand .txt{font-size:.8rem;opacity:.9;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
@media(max-width:480px){.topbar .brand .txt{display:none}}
.topbar .tasa{display:flex;flex-direction:column;align-items:flex-end;line-height:1.15;font-size:.72rem;font-weight:600;background:rgba(255,255,255,.18);padding:.2rem .5rem;border-radius:5px;white-space:nowrap;flex-shrink:0;font-variant-numeric:tabular-nums}
.topbar .tasa .muted{color:rgba(255,255,255,.6)}
.topbar .logo{flex-shrink:0}
.topbar .tasa:empty{display:none}
.topbar .tasa.stale{color:var(--amber);background:var(--amber-bg);color:var(--amber)}
.nav{display:flex;gap:.3rem;overflow-x:auto;padding:.5rem .9rem;background:#fff;border-bottom:1px solid var(--line)}
.nav a{white-space:nowrap;padding:.4rem .8rem;border-radius:5px;text-decoration:none;font-size:.9rem;color:var(--muted);border:1px solid transparent}
.nav a.active,.nav a:hover{background:var(--bg);color:var(--ink);border-color:var(--line)}
.wrap{padding:1rem .9rem 5rem;max-width:1100px;margin:0 auto}
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:1rem;margin-bottom:1rem}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;border:1px solid var(--line);background:#fff;color:var(--ink);padding:.6rem 1rem;border-radius:5px;cursor:pointer;text-decoration:none;font-weight:600;min-height:44px}
.btn:active{transform:scale(.98)}
.btn.primary{background:var(--brand);color:#fff;border-color:var(--brand)}
.btn.green{background:var(--green);color:#fff;border-color:var(--green)}
.btn.ghost{background:transparent}
.btn.danger{color:var(--red);border-color:#f0c7c9;background:var(--red-bg)}
.btn.sm{min-height:38px;padding:.35rem .7rem;font-size:.9rem}
.btn.block{width:100%}
.btn:disabled{opacity:.45;cursor:not-allowed}
input[type=text],input[type=number],input[type=password],input[type=date],input[type=tel],select,textarea{width:100%;padding:.65rem .8rem;border:1px solid var(--line);border-radius:5px;background:#fff;min-height:44px}
label{display:block;font-size:.85rem;color:var(--muted);margin:.5rem 0 .25rem}
.flash{padding:.7rem 1rem;border-radius:6px;margin-bottom:1rem;font-weight:500}
.flash.ok{background:var(--green-bg);color:var(--green)}
.flash.error{background:var(--red-bg);color:var(--red)}
.pill{display:inline-block;font-size:.75rem;font-weight:700;padding:.15rem .55rem;border-radius:999px;text-transform:uppercase;letter-spacing:.3px}
.pill.ok{background:var(--green-bg);color:var(--green)}
.pill.warn{background:var(--amber-bg);color:var(--amber)}
.pill.off{background:#eee;color:#777}
.pill.red{background:var(--red-bg);color:var(--red)}
.muted{color:var(--muted)}
.small{font-size:.85rem}
.row{display:flex;gap:.6rem;align-items:center;flex-wrap:wrap}
.grow{flex:1}
table{width:100%;border-collapse:collapse;font-size:.92rem}
th,td{text-align:left;padding:.5rem .4rem;border-bottom:1px solid var(--line);vertical-align:middle}
th{font-size:.78rem;text-transform:uppercase;color:var(--muted);letter-spacing:.4px}
td.num,th.num{text-align:right;white-space:nowrap}
.table-wrap{overflow-x:auto}

/* ---------- POS ---------- */
.pos{display:grid;grid-template-columns:1fr;gap:1rem}
@media(min-width:900px){.pos{grid-template-columns:1.4fr 1fr;align-items:start}.cart{position:sticky;top:64px}}
.cats{display:flex;gap:.4rem;overflow-x:auto;padding-bottom:.5rem;margin-bottom:.5rem}
.cats button{white-space:nowrap;border:1px solid var(--line);background:#fff;padding:.4rem .9rem;border-radius:5px;cursor:pointer}
.cats button.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:.6rem}
.prod{background:#fff;border:1px solid var(--line);border-radius:6px;padding:.6rem;cursor:pointer;min-height:90px;display:flex;flex-direction:column;justify-content:space-between;position:relative;box-shadow:var(--shadow)}
.prod:active{transform:scale(.97)}
.prod .n{font-weight:600;line-height:1.15;font-size:.95rem}
.prod .p{font-size:1.05rem;font-weight:700;margin-top:.25rem}
.prod .s{font-size:.75rem;color:var(--muted)}
.prod .img{width:100%;height:84px;object-fit:contain;border-radius:4px;display:block;margin-bottom:.4rem;background:#fff}
.prod .img.ph{display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#e9edf6,#d5d9df);color:var(--brand);font-size:1.6rem;font-weight:800;opacity:.75}
@media(min-width:900px){.prod .img{height:110px}}
.prod.off .img{filter:grayscale(1)}
.prod.off{opacity:.5;cursor:not-allowed;background:#f6f6f6}
.prod.low .s{color:var(--amber);font-weight:600}
.prod .badge{position:absolute;top:-6px;right:-6px;background:var(--brand);color:#fff;font-size:.8rem;font-weight:700;min-width:24px;height:24px;border-radius:999px;display:flex;align-items:center;justify-content:center;padding:0 6px}
.cart .card{padding:.7rem}
.cart h3{font-size:1rem;margin-bottom:.2rem}
.cart-items{max-height:34vh;overflow-y:auto;margin:.2rem 0 .5rem}
.ci{display:flex;align-items:center;gap:.4rem;padding:.3rem 0;border-bottom:1px solid var(--line)}
.ci .n{flex:1;min-width:0;font-size:.95rem;line-height:1.15;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ci .n small{display:block;color:var(--muted);font-size:.72rem}
.qty{display:flex;align-items:center;border:1px solid var(--line);border-radius:5px;overflow:hidden;flex-shrink:0}
.qty button{border:0;background:#fff;width:40px;height:40px;font-size:1.3rem;cursor:pointer;color:var(--ink)}
.qty span{min-width:26px;text-align:center;font-weight:700}
.ci .sub{min-width:56px;text-align:right;font-weight:700;font-size:.95rem}
.ci .del{border:0;background:none;color:var(--red);font-size:1rem;cursor:pointer;padding:.3rem .2rem;width:28px}
.empty{padding:.8rem 0}
/* bloque Cobrar: rectángulo con montos grandes */
.cobrar-box{display:flex;align-items:center;gap:.6rem;width:100%;border:0;border-radius:8px;background:var(--green);color:#fff;padding:.6rem .9rem;cursor:pointer;text-align:left;box-shadow:var(--shadow)}
.cobrar-box .cb-go{flex:1;font-size:1.9rem;font-weight:900;letter-spacing:.5px;line-height:1;text-transform:uppercase}
.cobrar-box .cb-go small{display:block;font-size:.8rem;font-weight:600;letter-spacing:.3px;opacity:.85;margin-top:.25rem;text-transform:none}
.cobrar-box .cb-nums{display:flex;flex-direction:column;align-items:flex-end;gap:.1rem}
.cobrar-box:active{transform:scale(.99)}
.cobrar-box:disabled{opacity:.55;cursor:not-allowed}
.cobrar-box .cb-row{display:flex;align-items:baseline;justify-content:flex-end;gap:.5rem;line-height:1.05;font-variant-numeric:tabular-nums}
.cobrar-box .cb-lbl{font-size:.9rem;font-weight:600;opacity:.85;text-transform:uppercase;letter-spacing:.4px}
.cobrar-box .cb-usd{font-size:2.6rem;font-weight:800}
.cobrar-box .cb-bs{font-size:1.5rem;font-weight:700;opacity:.95}
.cobrar-box .cb-usd{font-size:2.4rem;font-weight:800;line-height:1}
.cobrar-box .cb-bs{font-size:1.35rem;font-weight:700;opacity:.95;line-height:1.1}
.cobrar-box .cb-lbl{font-size:.75rem}
@media(max-width:380px){.cobrar-box .cb-go{font-size:1.5rem}.cobrar-box .cb-usd{font-size:2rem}}
.empty{text-align:center;color:var(--muted);padding:1.5rem 0}
.pay-methods{display:grid;grid-template-columns:1fr 1fr;gap:.5rem;margin:.5rem 0}
.pay-methods label{margin:0}
.pay-methods input{display:none}
.pay-methods span{display:flex;align-items:center;justify-content:center;text-align:center;border:2px solid var(--line);border-radius:6px;padding:.7rem .5rem;font-weight:600;cursor:pointer;min-height:52px;color:var(--ink)}
.pay-methods input:checked+span{border-color:var(--brand);background:#e9edf6;color:var(--brand)}

/* modal */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.45);display:none;align-items:flex-end;justify-content:center;z-index:50;padding:0}
.modal.open{display:flex}
.modal .box{background:#fff;width:100%;max-width:520px;border-radius:10px 10px 0 0;padding:1rem 1rem 1.5rem;max-height:92vh;overflow-y:auto}
@media(min-width:700px){.modal{align-items:center;padding:1rem}.modal .box{border-radius:10px}}
.modal h3{display:flex;justify-content:space-between;align-items:center}
.modal .x{border:0;background:none;font-size:1.5rem;cursor:pointer;color:var(--muted)}

/* mobile cart bar */
.cartbar{position:fixed;left:0;right:0;bottom:0;background:var(--ink);color:#fff;padding:.7rem 1rem;display:flex;justify-content:space-between;align-items:center;z-index:30;box-shadow:0 -4px 16px rgba(0,0,0,.15)}
.cartbar b{font-size:1.15rem}
@media(min-width:900px){.cartbar{display:none}}

/* recibo */
.recibo{max-width:380px;margin:1rem auto;background:#fff;padding:1.2rem;border-radius:6px;box-shadow:var(--shadow);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9rem}
.recibo h2{text-align:center;font-size:1rem}
.recibo .c{text-align:center;color:var(--muted);font-size:.8rem}
.recibo hr{border:0;border-top:1px dashed #999;margin:.6rem 0}
.recibo .l{display:flex;justify-content:space-between;gap:.5rem}
.recibo .tot{font-size:1.1rem;font-weight:800}
.recibo .anulado{color:var(--red);text-align:center;font-weight:800;border:2px solid var(--red);padding:.3rem;margin:.5rem 0}
@media print{body{background:#fff}.topbar,.nav,.noprint,.cartbar{display:none!important}.recibo{box-shadow:none;margin:0;max-width:none}}
.login{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:1rem}
.login .card{width:100%;max-width:380px}
.stat{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:.6rem;margin-bottom:1rem}
.stat div{background:#fff;border:1px solid var(--line);border-radius:6px;padding:.8rem}
.stat b{display:block;font-size:1.4rem}
.stat span{font-size:.8rem;color:var(--muted)}
details summary{cursor:pointer;font-weight:600;padding:.4rem 0}

/* ---------- tienda: lista agrupada por artículo con variantes ---------- */
.lista{display:flex;flex-direction:column;gap:.5rem}
.grupo{display:flex;gap:.6rem;background:#fff;border:1px solid var(--line);border-radius:6px;padding:.55rem;box-shadow:var(--shadow);min-width:0;overflow:hidden}
.gimg{width:64px;height:64px;object-fit:contain;border-radius:4px;background:#fff;flex-shrink:0;border:1px solid var(--line)}
.gimg.ph{display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#e9edf6,#d5d9df);color:var(--brand);font-size:1.4rem;font-weight:800;opacity:.75;border:0}
.ginfo{flex:1;min-width:0}
.gn{font-weight:600;line-height:1.2;overflow-wrap:anywhere}
.gn .gm{color:var(--brand);text-transform:uppercase;font-size:.78rem;letter-spacing:.4px;margin-right:.2rem}
.gp{font-weight:700;font-size:1rem;margin:.1rem 0 .35rem}
.vars{display:flex;flex-wrap:wrap;gap:.35rem}
.var{position:relative;border:1px solid var(--line);background:#fff;border-radius:5px;padding:.35rem .55rem;min-width:62px;min-height:44px;cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;line-height:1.1;color:var(--ink)}
.var:active{transform:scale(.97)}
.var .vl{font-weight:700;font-size:.95rem}
.var .vp{font-size:.72rem;color:var(--muted)}
.var .vs{font-size:.7rem;color:var(--muted)}
.var.low .vs{color:var(--amber);font-weight:700}
.var.off{opacity:.45;cursor:not-allowed;background:#f6f6f6}
.var .badge{top:-7px;right:-7px}
@media(min-width:900px){.gimg{width:76px;height:76px}}

/* inventario / pedidos a proveedor */
.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:.8rem}
.grid3{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:.8rem}
.kpi .big{font-size:1.9rem;font-weight:800;line-height:1.1;margin-top:.2rem}
.kpi.warn{border-left:5px solid #e0a100}
.warn-txt{color:#b00020;font-weight:700}
td.r,th.r{text-align:right;white-space:nowrap}
.estado{display:inline-block;padding:.15rem .5rem;border-radius:4px;font-size:.78rem;font-weight:700;text-transform:uppercase;background:#e8e8e8}
.estado.enviada{background:#dbe7ff;color:#1a4fb3}.estado.parcial{background:#fff1c7;color:#8a6500}.estado.recibida{background:#d9f2e1;color:#1b7f3b}.estado.cancelada{background:#f6d5d5;color:#b00020}
.op-tabla input[type=number]{width:80px;text-align:right}
@media print{.nav,header,.no-print,.flash{display:none!important}.wrap{max-width:none;padding:0}.card{border:none;box-shadow:none}}