/* Tienda basica - CSS minimo, movil primero. Sin frameworks. */
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:15px/1.35 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:#111;background:#fff}
a{color:#06c;text-decoration:none}
img{display:block}

/* ---------- Cabecera fija ---------- */
header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid #ddd;padding:6px 8px}
.marca{font-weight:700;font-size:17px;letter-spacing:.5px;margin:0 0 6px;display:flex;justify-content:space-between;align-items:center}
.marca a{color:#111}
#q{width:100%;padding:9px 10px;font-size:16px;border:1px solid #bbb;border-radius:6px}

/* ---------- Filtros ---------- */
.filtros{margin-top:6px}
.filtros summary{cursor:pointer;font-size:33px;color:#444;padding:4px 0;user-select:none}
.grupo{margin:4px 0}
.grupo b{display:block;font-size:11px;text-transform:uppercase;color:#777;margin:4px 0 3px}
.chips{display:flex;flex-wrap:wrap;gap:4px}
.chip{font:inherit;font-size:12px;padding:4px 8px;border:1px solid #bbb;background:#f6f6f6;border-radius:12px;cursor:pointer;white-space:nowrap}
.chip.on{background:#111;color:#fff;border-color:#111}
.chip.cat.on{background:#06c;border-color:#06c}
.acciones{margin-top:6px;font-size:12px}
.acciones button{font:inherit;padding:4px 8px;border:1px solid #bbb;background:#F54927;border-radius:6px;cursor:pointer}
#contador{font-size:12px;color:#666;padding:4px 2px}

/* ---------- Tabla de productos ---------- */
table{width:100%;border-collapse:collapse}
th{font-size:11px;text-transform:uppercase;color:#666;text-align:left;padding:4px;border-bottom:1px solid #ddd;background:#fafafa}
td{padding:5px 4px;border-bottom:1px solid #eee;vertical-align:middle}
tr.oculto{display:none}
.fab{font-weight:600;font-size:12px}
.desc{font-size:13px}
.ref{font-family:ui-monospace,Consolas,monospace;font-size:12px;color:#333}
.uds{text-align:center;font-variant-numeric:tabular-nums;font-size:13px}
.uds.sin{color:#c00}
.precio{text-align:right;font-variant-numeric:tabular-nums;font-size:13px;white-space:nowrap}
td.img{width:52px}
td.img img{width:46px;height:46px;object-fit:cover;border:1px solid #ddd;border-radius:4px}
.add{font:inherit;font-size:18px;line-height:1;width:36px;height:32px;border:1px solid #0a0;background:#0a0;color:#fff;border-radius:6px;cursor:pointer}
.add:disabled{background:#ccc;border-color:#ccc;cursor:default}
.add.ok{background:#060;border-color:#060}
td.acc{width:42px;text-align:right}
.vacio{padding:24px 8px;text-align:center;color:#777}

/* ---------- Botones flotantes ---------- */
.fab-btn{position:fixed;bottom:14px;width:52px;height:52px;border-radius:50%;border:none;color:#fff;font-size:20px;
  display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 2px 6px rgba(0,0,0,.35);z-index:60;text-decoration:none}
#arriba{right:14px;background:#444}
#cesta{left:14px;background:#c60}
#cesta .n{position:absolute;top:-3px;right:-3px;background:#111;color:#fff;font-size:11px;min-width:20px;height:20px;
  border-radius:10px;display:flex;align-items:center;justify-content:center;padding:0 4px}

/* ---------- Paginas simples (cesta, admin) ---------- */
.wrap{padding:10px;max-width:1100px;margin:0 auto}
h1{font-size:18px;margin:8px 0}
h2{font-size:15px;margin:14px 0 6px}
.btn{display:inline-block;font:inherit;padding:8px 12px;border:1px solid #111;background:#111;color:#fff;border-radius:6px;cursor:pointer}
.btn.sec{background:#fff;color:#111}
.btn.rojo{background:#c00;border-color:#c00;color:#fff}
input[type=text],input[type=number],input[type=password],select,textarea{font:inherit;padding:7px;border:1px solid #bbb;border-radius:5px;width:100%;max-width:420px}
label{display:block;font-size:12px;color:#555;margin:8px 0 2px}
.aviso{padding:8px;border-radius:6px;margin:8px 0;font-size:14px}
.aviso.ok{background:#e7f6e7;border:1px solid #9c9}
.aviso.err{background:#fdecec;border:1px solid #e99}
.mini{font-size:12px;color:#666}