:root {
  --negro: #0a0a0b; --carbon: #131315; --blanco: #fff; --amarillo: #ffd60a; --suave: #a3a3a8;
  --linea: rgba(255, 255, 255, 0.16); --rojo: #ff7b72; --verde: #7ee787;
  --f-titulo: "Inter Tight", "Helvetica Neue", Arial, sans-serif;
  --f-texto: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --ease: cubic-bezier(0.2, 0.7, 0.1, 1);
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--negro); color: var(--blanco); font: 400 1.0625rem/1.55 var(--f-texto); -webkit-font-smoothing: antialiased; padding-bottom: env(safe-area-inset-bottom, 0px); }
a { color: inherit; }
img { max-width: 100%; display: block; }
b { font-weight: 600; }
.ancho { width: min(1180px, 100% - max(32px, 8vw)); margin-inline: auto; }

.top { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px max(16px, 4vw); border-bottom: 1px solid var(--linea); }
.volver { text-decoration: none; font-weight: 500; color: var(--suave); }
.volver:hover { color: var(--blanco); }
.top-wa { text-decoration: none; font-weight: 600; font-size: 0.9375rem; padding: 8px 16px; border: 1.5px solid var(--blanco); border-radius: 999px; }
.top-wa:hover { background: var(--blanco); color: var(--negro); }

.rotulo { display: flex; align-items: center; gap: 10px; margin: clamp(28px, 5vw, 56px) 0 12px; font-size: 0.9375rem; color: #d6d6da; }
.rotulo i { width: 9px; height: 9px; border-radius: 50%; background: var(--amarillo); }
h1 { margin: 0; font: 800 clamp(3rem, 11vw, 8rem)/0.92 var(--f-titulo); letter-spacing: -0.055em; }
h1 em { font-style: normal; color: var(--amarillo); }
#s-titulo { font-size: clamp(2.6rem, 8vw, 5.5rem); }
h2 { margin: 0 0 14px; font: 800 1.5rem/1.1 var(--f-titulo); letter-spacing: -0.03em; }
.sub { max-width: 40rem; margin: 18px 0 clamp(28px, 5vw, 48px); color: #d6d6da; font-size: clamp(1.05rem, 1.6vw, 1.25rem); }

.layout { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: clamp(24px, 4vw, 56px); align-items: start; padding-bottom: clamp(48px, 8vw, 96px); }
form { min-width: 0; }
fieldset { border: 0; border-top: 1px solid var(--linea); margin: 0; padding: 28px 0 32px; min-width: 0; }
legend { display: flex; align-items: center; gap: 12px; padding: 0; margin-bottom: 18px; font: 800 clamp(1.5rem, 3vw, 2rem)/1.1 var(--f-titulo); letter-spacing: -0.03em; float: left; width: 100%; }
legend + * { clear: both; }
.paso { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--amarillo); color: var(--negro); font: 800 1rem var(--f-titulo); letter-spacing: 0; flex: none; }
label { display: block; margin: 0 0 8px; font-weight: 500; }
.op { color: var(--suave); font-weight: 400; font-size: 0.875rem; }
input[type="text"], input[type="tel"], input[type="email"], textarea { width: 100%; font: inherit; color: var(--blanco); background: var(--carbon); border: 1px solid var(--linea); border-radius: 12px; padding: 13px 14px; }
textarea { resize: vertical; min-height: 120px; }
input::placeholder, textarea::placeholder { color: #6f6f75; }
input:focus-visible, textarea:focus-visible, .btn:focus-visible, .zona:focus-within, .opcion:focus-within, .paso-mas:focus-visible, .paso-menos:focus-visible { outline: 2px solid var(--amarillo); outline-offset: 2px; }
.ayuda { margin: 8px 0 0; font-size: 0.875rem; color: var(--suave); }
.trampa { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }

/* Catálogo */
.cat { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.pieza { background: var(--carbon); border: 1.5px solid var(--linea); border-radius: 16px; padding: 16px; display: flex; flex-direction: column; gap: 10px; transition: border-color 0.2s, background 0.2s; }
.pieza.elegida { border-color: var(--amarillo); background: #17170f; }
.pieza h3 { margin: 0; font: 600 1.125rem/1.2 var(--f-titulo); letter-spacing: -0.01em; }
.pieza p { margin: 0; font-size: 0.875rem; color: var(--suave); flex: 1; }
.pieza-pie { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.precio { font: 800 1.5rem/1 var(--f-titulo); letter-spacing: -0.03em; color: var(--amarillo); }
.cant { display: inline-flex; align-items: center; border: 1.5px solid var(--linea); border-radius: 999px; overflow: hidden; }
.cant button { width: 44px; height: 44px; border: 0; background: none; color: var(--blanco); font-size: 1.4rem; cursor: pointer; line-height: 1; }
.cant button:hover:not(:disabled) { background: rgba(255, 255, 255, 0.1); }
.cant button:disabled { color: #4a4a50; cursor: default; }
.cant output { min-width: 28px; text-align: center; font-weight: 600; }
.cargando { color: var(--suave); }

/* Subida de archivos */
.zona { position: relative; border: 2px dashed var(--linea); border-radius: 16px; padding: 26px 16px; text-align: center; transition: border-color 0.2s, background 0.2s; }
.zona p { margin: 0; }
.zona.sobre { border-color: var(--amarillo); background: rgba(255, 214, 10, 0.06); }
.zona input { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; cursor: pointer; }
.archivos { list-style: none; margin: 12px 0 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.archivos li { position: relative; background: var(--carbon); border: 1px solid var(--linea); border-radius: 12px; overflow: hidden; }
.archivos .miniatura { aspect-ratio: 4 / 3; width: 100%; object-fit: cover; background: #000; display: grid; place-items: center; font-weight: 600; color: var(--suave); }
.archivos .nom { padding: 6px 10px; font-size: 0.8125rem; color: var(--suave); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.archivos button { position: absolute; top: 6px; right: 6px; width: 32px; height: 32px; border-radius: 50%; border: 0; background: rgba(0, 0, 0, 0.75); color: var(--blanco); cursor: pointer; font-size: 1rem; }
.archivos button:hover { background: var(--rojo); color: var(--negro); }

/* Entrega y datos */
.entrega { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.opcion { display: flex; align-items: flex-start; gap: 12px; margin: 0; padding: 16px; background: var(--carbon); border: 1.5px solid var(--linea); border-radius: 16px; cursor: pointer; font-weight: 400; }
.opcion:has(input:checked) { border-color: var(--amarillo); background: #17170f; }
.opcion input { margin-top: 5px; accent-color: var(--amarillo); width: 18px; height: 18px; flex: none; }
.opcion span { display: flex; flex-direction: column; }
.opcion small { color: var(--suave); font-size: 0.875rem; }
.campos { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.ancho-2 { grid-column: 1 / -1; }
.acepto { display: flex; gap: 12px; align-items: flex-start; margin: 20px 0 0; font-weight: 400; font-size: 0.9375rem; color: #d6d6da; cursor: pointer; }
.acepto input { margin-top: 4px; accent-color: var(--amarillo); width: 18px; height: 18px; flex: none; }
.error { color: var(--rojo); font-weight: 500; margin: 12px 0 0; }

/* Resumen */
.resumen { position: sticky; top: 16px; background: var(--carbon); border: 1px solid var(--linea); border-radius: 20px; padding: 22px; }
.r-lineas { list-style: none; margin: 0 0 14px; padding: 0; display: grid; gap: 8px; }
.r-lineas li { display: flex; justify-content: space-between; gap: 12px; font-size: 0.9375rem; }
.r-lineas li span { color: #d6d6da; }
.r-lineas .vacio { color: var(--suave); }
.r-fila, .r-total { display: flex; justify-content: space-between; align-items: baseline; margin: 0; padding-top: 12px; border-top: 1px solid var(--linea); }
.r-total { margin-bottom: 16px; }
.r-total b { font: 800 2.25rem/1 var(--f-titulo); letter-spacing: -0.04em; color: var(--amarillo); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; width: 100%; padding: 15px 24px; border-radius: 999px; border: 1.5px solid transparent; font: 600 1.0625rem var(--f-texto); text-decoration: none; cursor: pointer; transition: transform 0.2s var(--ease), background 0.2s, color 0.2s; }
.btn-lleno { background: var(--amarillo); color: var(--negro); }
.btn-lleno:hover:not(:disabled) { transform: translateY(-2px); }
.btn-lleno:disabled { background: #3a3a3e; color: #85858b; cursor: not-allowed; }
.btn-borde { border-color: var(--blanco); color: var(--blanco); background: none; }
.btn-borde:hover { background: var(--blanco); color: var(--negro); }

/* Seguimiento */
.estado { font: 600 clamp(1.25rem, 2.5vw, 1.75rem)/1.2 var(--f-titulo); color: var(--amarillo); margin: 18px 0 28px; }
.pasos { list-style: none; margin: 0 0 32px; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; counter-reset: p; }
.pasos li { position: relative; padding-top: 18px; border-top: 4px solid var(--linea); font-size: 0.9375rem; color: var(--suave); }
.pasos li.hecho { border-top-color: var(--amarillo); color: var(--blanco); }
.pasos li.actual { color: var(--amarillo); font-weight: 600; }
.s-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; align-items: start; padding-bottom: clamp(48px, 8vw, 96px); }
.tarjeta { background: var(--carbon); border: 1px solid var(--linea); border-radius: 20px; padding: 24px; }
.banco { list-style: none; margin: 0 0 20px; padding: 0; display: grid; gap: 10px; }
.banco li { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding-bottom: 10px; border-bottom: 1px solid var(--linea); }
.banco span { color: var(--suave); font-size: 0.875rem; }
.banco button { margin-left: 8px; background: none; border: 1px solid var(--linea); border-radius: 999px; color: var(--blanco); padding: 4px 12px; cursor: pointer; font: 500 0.8125rem var(--f-texto); }
.banco button:hover { background: var(--blanco); color: var(--negro); }
.aviso-pago { margin: 0 0 20px; padding: 14px 16px; border: 1px solid var(--linea); border-radius: 12px; color: #d6d6da; }
#comprobante { width: 100%; margin-bottom: 14px; padding: 12px; background: var(--carbon); border: 1px dashed var(--linea); border-radius: 12px; color: var(--suave); font: inherit; }
.tarjeta .btn { margin-top: 6px; }

.pie { border-top: 1px solid var(--linea); padding: 24px max(16px, 4vw); color: var(--suave); font-size: 0.875rem; }
.pie p { margin: 0; }
.sin-js { margin: 24px; padding: 16px; border: 1px solid var(--rojo); border-radius: 12px; }
[hidden] { display: none !important; }

@media (max-width: 920px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .resumen { position: static; }
  .s-grid { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 560px) {
  .entrega, .campos { grid-template-columns: minmax(0, 1fr); }
  .pasos { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cat { grid-template-columns: minmax(0, 1fr); }
  .resumen { position: sticky; bottom: 0; top: auto; border-radius: 20px 20px 0 0; margin-inline: -4vw; padding: 14px 4vw calc(14px + env(safe-area-inset-bottom, 0px)); z-index: 5; }
  .resumen h2, .resumen .r-lineas, #r-ayuda { display: none; }
  .r-fila { padding-top: 0; border: 0; }
  .r-total { border: 0; padding-top: 0; margin-bottom: 10px; }
  .r-total b { font-size: 1.75rem; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }