:root{--primary:#d81b60;--primary-dark:#ad1457;--bg:#f6f7fb;--card:#fff;--text:#202124;--muted:#6b7280;--border:#e5e7eb;--ok:#138a36;--danger:#c62828;--shadow:0 12px 35px rgba(31,41,55,.10)}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--text)}a{color:inherit;text-decoration:none}.topbar{background:linear-gradient(135deg,var(--primary),#ff6ea8);color:#fff;padding:14px 18px;display:flex;justify-content:space-between;gap:14px;align-items:center;position:sticky;top:0;z-index:5;box-shadow:0 8px 24px rgba(0,0,0,.12)}.brand{display:flex;align-items:center;gap:12px}.brand span{display:block;font-size:12px;opacity:.9}.logo{width:44px;height:44px;border-radius:14px;background:#fff;color:var(--primary);display:flex;align-items:center;justify-content:center;font-weight:900}.topbar nav{display:flex;gap:8px;flex-wrap:wrap}.topbar nav a{background:rgba(255,255,255,.18);padding:9px 12px;border-radius:999px;font-size:14px}.container{width:min(1120px,100%);margin:0 auto;padding:22px}.login-card,.panel,.client-card,.total-box{background:var(--card);border:1px solid var(--border);border-radius:22px;box-shadow:var(--shadow)}.login-card{max-width:430px;margin:42px auto;padding:28px}.form{display:grid;gap:15px}.form label{font-weight:700;font-size:14px}.form input,.form textarea,.form select,.search input{width:100%;margin-top:7px;border:1px solid var(--border);border-radius:14px;padding:13px 14px;font:inherit;background:#fff}.form input:focus,.form textarea:focus,.form select:focus,.search input:focus{outline:3px solid rgba(216,27,96,.16);border-color:var(--primary)}.btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--border);border-radius:14px;padding:11px 15px;background:#fff;font-weight:800;cursor:pointer;white-space:nowrap}.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn.primary:hover{background:var(--primary-dark)}.btn.small{padding:8px 10px;font-size:13px}.muted{color:var(--muted)}.hint{margin-top:18px;background:#fff7fb;border:1px dashed #f5aac8;padding:14px;border-radius:16px;font-size:14px}.alert{padding:13px 15px;border-radius:14px;margin-bottom:15px;font-weight:700}.alert.ok{background:#eaf7ee;color:#116329}.alert.error{background:#ffebee;color:#b71c1c}.alert.info{background:#eff6ff;color:#1e3a8a;border:1px solid #bfdbfe}.dashboard-head,.profile-head{display:flex;justify-content:space-between;align-items:stretch;gap:16px;margin-bottom:18px}.dashboard-head h1,.profile-head h1{margin-bottom:4px}.total-box{padding:18px;min-width:190px;display:grid;align-content:center}.total-box span{color:var(--muted);font-size:13px;font-weight:700}.total-box strong{font-size:30px}.total-box.danger strong{color:var(--danger)}.search{display:flex;gap:10px;margin-bottom:18px}.search input{margin:0}.cards-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:15px}.client-card{padding:18px}.client-top{display:flex;justify-content:space-between;gap:12px;align-items:flex-start}.client-card h2{font-size:20px;margin:0}.saldo{font-weight:900;border-radius:999px;padding:7px 10px;background:#eef2ff}.saldo.debe{background:#ffebee;color:var(--danger)}.saldo.ok-saldo{background:#eaf7ee;color:var(--ok)}.actions{display:flex;gap:8px;flex-wrap:wrap}.margin-bottom{margin-bottom:16px}.panel{padding:18px}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;background:#fff}th,td{padding:12px;border-bottom:1px solid var(--border);text-align:left;vertical-align:top}th{font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}.tag{border-radius:999px;padding:5px 9px;font-weight:800;font-size:12px}.tag.cargo{background:#ffebee;color:#b71c1c}.tag.abono{background:#eaf7ee;color:#116329}.amount{font-weight:900}.amount.plus{color:#b71c1c}.amount.minus{color:#116329}.empty{background:#fff;border:1px dashed var(--border);border-radius:18px;padding:24px;text-align:center;color:var(--muted)}@media(max-width:720px){.topbar,.dashboard-head,.profile-head,.search{flex-direction:column}.container{padding:14px}.topbar{align-items:flex-start}.topbar nav{width:100%}.topbar nav a{flex:1;text-align:center}.total-box{width:100%}.actions .btn{flex:1}.login-card{margin:18px auto;padding:20px}}
.form-grid{display:grid;gap:15px}.form-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.form input[readonly]{background:#f3f4f6;font-weight:900;color:var(--primary)}@media(max-width:720px){.form-grid.two{grid-template-columns:1fr}}
.products-head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}.products-head h2{margin:0}.products-list{display:grid;gap:14px}.product-row{border:1px solid var(--border);border-radius:18px;padding:14px;background:#fff}.product-row-top{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px}.product-grid{grid-template-columns:2fr .8fr 1fr 1fr}.grand-total{display:flex;justify-content:space-between;align-items:center;gap:12px;background:#fff7fb;border:1px solid #f5aac8;border-radius:18px;padding:16px}.grand-total span{font-weight:800;color:var(--muted)}.grand-total strong{font-size:26px;color:var(--primary)}.danger-btn{color:#b71c1c;background:#fff5f5;border-color:#ffcdd2}@media(max-width:850px){.product-grid{grid-template-columns:1fr 1fr}}@media(max-width:560px){.product-grid{grid-template-columns:1fr}.products-head .btn{width:100%}}
/* V5: productos en una sola línea y botones con JS por delegación */
.one-line-products{display:grid;gap:10px}.product-row-line{display:grid;grid-template-columns:44px minmax(190px,2fr) 95px 140px 145px minmax(160px,1.4fr) 92px;align-items:end;gap:10px;padding:12px}.product-row-line label{margin:0;font-size:12px}.product-row-line input{margin-top:5px;padding:11px 12px}.row-badge{height:42px;min-width:42px;border-radius:14px;background:#fff7fb;border:1px solid #f5aac8;color:var(--primary);font-weight:900;display:flex;align-items:center;justify-content:center;margin-bottom:1px}.product-row-line .remove-row{height:42px;margin-bottom:1px}.product-row-line .row-total{color:var(--primary-dark);background:#fff7fb;border-color:#f5aac8;text-align:right}.products-head{margin-top:10px}.grand-total{margin-top:4px}.grand-total strong{font-variant-numeric:tabular-nums}@media(max-width:980px){.product-row-line{grid-template-columns:40px 1fr 90px 120px 130px}.field-detail{grid-column:2/5}.product-row-line .remove-row{grid-column:5/6}}@media(max-width:640px){.product-row-line{grid-template-columns:38px 1fr 86px}.field-product{grid-column:2/4}.field-price,.field-total,.field-detail{grid-column:1/4}.product-row-line .remove-row{grid-column:1/4;width:100%}.row-badge{margin-top:20px}}

/* V8: botón volver con aviso si hay datos sin guardar */
.page-title-row{display:flex;justify-content:space-between;align-items:flex-start;gap:14px;margin-bottom:14px}.page-title-row h1{margin-bottom:4px}.page-title-row .muted{margin-top:0}.back-btn{margin-top:8px;background:#fff}.back-btn:hover{border-color:var(--primary);color:var(--primary)}@media(max-width:640px){.page-title-row{flex-direction:column}.back-btn{width:100%;justify-content:flex-start}}

/* V9: cancelar en formulario de cliente */
.form-actions{display:flex;gap:10px;align-items:center;justify-content:flex-end;flex-wrap:wrap}.form-actions .btn.primary{min-width:180px}.form-actions .btn:not(.primary){min-width:130px}@media(max-width:640px){.form-actions .btn{width:100%}}

/* V11: historial agrupado por ticket y comprobante de productos */
.ticket-products-mini{margin-top:6px;color:var(--muted);font-size:13px;line-height:1.45}.ticket-box{max-width:920px;margin:0 auto}.ticket-header{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;border-bottom:1px solid var(--border);padding-bottom:14px;margin-bottom:14px}.ticket-header h2{margin:0}.ticket-number{text-align:right;background:#fff7fb;border:1px solid #f5aac8;border-radius:16px;padding:12px 14px}.ticket-number span{display:block;color:var(--muted);font-size:12px;font-weight:800}.ticket-number strong{color:var(--primary);font-size:18px}.ticket-info{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-bottom:16px}.ticket-total{display:flex;justify-content:space-between;align-items:center;margin-top:16px;background:#fff7fb;border:1px solid #f5aac8;border-radius:18px;padding:16px}.ticket-total span{font-weight:900;color:var(--muted)}.ticket-total strong{font-size:28px;color:var(--primary)}@media(max-width:640px){.ticket-header,.ticket-info{display:block}.ticket-number{text-align:left;margin-top:10px}.ticket-info>div{margin-bottom:8px}}
@media print{.topbar,.no-print{display:none!important}.container{width:100%;padding:0}.panel,.ticket-box{box-shadow:none;border:0;border-radius:0}body{background:#fff}.ticket-box{max-width:none}.table-wrap{overflow:visible}}


/* V12: botón para compartir saldo por WhatsApp */
.btn.whatsapp{background:#25d366;border-color:#25d366;color:#fff}.btn.whatsapp:hover{filter:brightness(.95)}


/* V13: historial público solo lectura */
.public-note{display:inline-block;background:#fff7fb;border:1px solid #f5aac8;color:var(--primary-dark);border-radius:999px;padding:7px 11px;font-weight:800;margin-top:4px}.public-head{align-items:center}
.check-line{display:flex;gap:10px;align-items:center;font-weight:700;margin-bottom:14px}
.check-line input{width:auto}
.grid.two{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:760px){.grid.two{grid-template-columns:1fr}}


/* V23: instalación PWA */
.install-pwa-btn{background:rgba(255,255,255,.92);color:var(--primary);border:0;padding:9px 12px;border-radius:999px;font-size:14px;font-weight:900;cursor:pointer}
.install-pwa-btn[hidden]{display:none!important}
.install-pwa-btn:hover{background:#fff}
@media(max-width:720px){.install-pwa-btn{flex:1;text-align:center}}


/* V29: pantalla gris de guardado para evitar doble clic y duplicados */
.saving-overlay{position:fixed;inset:0;background:rgba(31,41,55,.55);z-index:9999;display:none;align-items:center;justify-content:center;padding:22px;backdrop-filter:blur(2px)}
.saving-overlay.is-visible{display:flex}.saving-box{width:min(360px,100%);background:#fff;border-radius:22px;box-shadow:0 18px 50px rgba(0,0,0,.28);padding:28px;text-align:center;display:grid;gap:10px;justify-items:center}.saving-box strong{font-size:24px}.saving-box span{color:var(--muted);font-weight:700}.saving-spinner{width:48px;height:48px;border-radius:50%;border:5px solid #f3c0d3;border-top-color:var(--primary);animation:savingSpin .8s linear infinite}@keyframes savingSpin{to{transform:rotate(360deg)}}
button:disabled,input[type="submit"]:disabled{opacity:.65;cursor:not-allowed}