:root {
  --fondo: #eef1f6;
  --superficie: #ffffff;
  --tinta: #0f172a;
  --texto-suave: #5b6472;
  --acento: #2563eb;
  --acento-oscuro: #1d4ed8;
  --dorado: #f59e0b;
  --borde: #dbe1ea;
  --sombra: 0 4px 16px rgba(15, 23, 42, 0.08);
  --radio: 14px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  background: var(--fondo);
  color: var(--tinta);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-tap-highlight-color: transparent;
}

.contenedor {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* Cabecera */
.cabecera {
  background: linear-gradient(135deg, #0b1220 0%, #1e293b 60%, #0f172a 100%);
  color: #fff;
  padding: 26px 0;
  position: relative;
  overflow: hidden;
}

.cabecera::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 85% 0%, rgba(245, 158, 11, 0.18), transparent 45%);
  pointer-events: none;
}

.cabecera .contenedor {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
}

.marca {
  display: flex;
  align-items: center;
  gap: 16px;
}

.marca-icono {
  width: 52px;
  height: 52px;
  color: var(--dorado);
  flex-shrink: 0;
}

.marca-nombre {
  font-size: clamp(24px, 4vw, 36px);
  letter-spacing: 1px;
  font-weight: 800;
}

.marca-nombre span {
  color: var(--dorado);
}

.marca-lema {
  color: #a8b3c7;
  font-size: 14px;
  margin-top: 2px;
}

/* Filtros */
.filtros {
  background: var(--superficie);
  border-bottom: 1px solid var(--borde);
  position: sticky;
  top: 0;
  z-index: 20;
  box-shadow: var(--sombra);
}

.filtros .contenedor {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 16px 20px;
  align-items: center;
}

.buscador {
  flex: 1 1 320px;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--fondo);
  border: 1px solid var(--borde);
  border-radius: 999px;
  padding: 0 18px;
  height: 46px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.buscador:focus-within {
  border-color: var(--acento);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.18);
}

.buscador-icono {
  width: 20px;
  height: 20px;
  color: var(--texto-suave);
  flex-shrink: 0;
}

.buscador input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: 15px;
  color: var(--tinta);
  min-width: 0;
}

.controles-filtro {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.select-wrapper select {
  appearance: none;
  height: 46px;
  padding: 0 38px 0 16px;
  font-size: 15px;
  color: var(--tinta);
  background: var(--fondo) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235b6472' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E") no-repeat right 12px center / 16px;
  border: 1px solid var(--borde);
  border-radius: 999px;
  cursor: pointer;
  max-width: 220px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.select-wrapper select:focus {
  outline: none;
  border-color: var(--acento);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.18);
}

.btn-limpiar {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 46px;
  padding: 0 18px;
  font-size: 15px;
  font-weight: 600;
  color: var(--acento-oscuro);
  background: transparent;
  border: 1.5px solid var(--acento);
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.btn-limpiar:hover {
  background: var(--acento);
  color: #fff;
}

.btn-limpiar svg {
  width: 17px;
  height: 17px;
}

/* Resultados */
.resultados {
  padding: 22px 0 6px;
  color: var(--texto-suave);
  font-size: 14px;
}

.resultados strong {
  color: var(--tinta);
}

/* Grilla */
main.contenedor {
  flex: 1;
  padding-bottom: 48px;
}

.grilla {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 22px;
  padding: 14px 0 10px;
}

.tarjeta {
  background: var(--superficie);
  border-radius: var(--radio);
  overflow: hidden;
  box-shadow: var(--sombra);
  border: 1px solid var(--borde);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  transition: transform 0.18s, box-shadow 0.18s;
  animation: aparecer 0.35s ease both;
}

.tarjeta:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.14);
}

@keyframes aparecer {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.tarjeta-imagen {
  aspect-ratio: 4 / 3;
  background: #e2e8f0;
  overflow: hidden;
  position: relative;
}

.tarjeta-imagen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.25s;
}

.tarjeta:hover .tarjeta-imagen img {
  transform: scale(1.05);
}

.tarjeta-imagen .sin-imagen {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: #94a3b8;
  font-size: 14px;
}

.tarjeta-imagen .sin-imagen svg {
  width: 44px;
  height: 44px;
}

.tarjeta-cuerpo {
  padding: 14px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.etiqueta {
  align-self: flex-start;
  font-size: 11.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--acento-oscuro);
  background: #dbeafe;
  padding: 3px 10px;
  border-radius: 999px;
}

.tarjeta-titulo {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 41px;
}

.precio {
  font-size: 21px;
  font-weight: 800;
  color: var(--acento);
  letter-spacing: 0.3px;
}

.tarjeta-marcas {
  margin-top: auto;
  font-size: 13px;
  color: var(--texto-suave);
}

.tarjeta-marcas strong {
  color: var(--tinta);
  font-weight: 600;
}

/* Estados */
.estado {
  text-align: center;
  padding: 70px 20px;
  color: var(--texto-suave);
}

.estado svg {
  width: 64px;
  height: 64px;
  color: #b6bfcc;
  margin-bottom: 14px;
}

.estado h2 {
  color: var(--tinta);
  font-size: 22px;
  margin-bottom: 6px;
}

.btn-primario {
  margin-top: 20px;
  padding: 12px 26px;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  background: var(--acento);
  border: none;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

.btn-primario:hover {
  background: var(--acento-oscuro);
}

.btn-primario:active {
  transform: scale(0.98);
}

.cargando {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 80px 0;
  color: var(--texto-suave);
}

.spinner {
  width: 46px;
  height: 46px;
  border: 4px solid var(--borde);
  border-top-color: var(--acento);
  border-radius: 50%;
  animation: girar 0.8s linear infinite;
}

@keyframes girar {
  to { transform: rotate(360deg); }
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-fondo {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.72);
  backdrop-filter: blur(3px);
}

.modal-contenido {
  position: relative;
  background: var(--superficie);
  border-radius: 18px;
  width: 100%;
  max-width: 860px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  animation: aparecer 0.25s ease both;
}

.modal-cerrar {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 40px;
  height: 40px;
  border: none;
  border-radius: 50%;
  background: rgba(15, 23, 42, 0.55);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
  z-index: 2;
}

.modal-cerrar:hover {
  background: rgba(15, 23, 42, 0.8);
}

.modal-cerrar svg {
  width: 20px;
  height: 20px;
}

.modal-cuerpo {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.modal-imagen {
  background: #e2e8f0;
  min-height: 320px;
}

.modal-imagen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.modal-info {
  padding: 34px 30px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.modal-info h2 {
  font-size: 26px;
  font-weight: 800;
  line-height: 1.25;
}

.modal-info .precio {
  font-size: 30px;
  color: var(--acento);
}

.modal-marcas {
  color: var(--texto-suave);
}

.modal-descripcion {
  margin-top: 8px;
  white-space: pre-line;
  color: #3b4657;
  border-top: 1px solid var(--borde);
  padding-top: 16px;
}

/* Botón flotante de WhatsApp */
.btn-whatsapp {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 8px;
  background: #25d366;
  color: #fff;
  text-decoration: none;
  padding: 10px 14px;
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(37, 211, 102, 0.45);
  font-weight: 700;
  font-size: 14px;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
}

.btn-whatsapp:hover {
  background: #1ebe5b;
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(37, 211, 102, 0.55);
}

.whatsapp-icono {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.whatsapp-texto {
  white-space: nowrap;
  -webkit-text-stroke: 1px #000;
  paint-order: stroke fill;
}

@media (max-width: 720px) {
  .whatsapp-texto {
    display: none;
  }

  .btn-whatsapp {
    width: 48px;
    height: 48px;
    padding: 0;
    border-radius: 50%;
    justify-content: center;
    right: 16px;
    bottom: max(16px, env(safe-area-inset-bottom));
  }

  .whatsapp-icono {
    width: 28px;
    height: 28px;
  }
}

/* Pie de página */
.pie {
  background: linear-gradient(135deg, #0b1220 0%, #16202f 100%);
  color: #a8b3c7;
  padding: 30px 0;
  text-align: center;
}

.pie strong {
  color: var(--dorado);
  letter-spacing: 0.5px;
}

.pie-seo {
  font-size: 13px;
  color: #6b7a8a;
  margin-top: 6px;
}

.pie-derechos {
  font-size: 13px;
  color: #7e8b9d;
  margin-top: 10px;
}

@media (max-width: 720px) {
  .cabecera {
    padding: 18px 0;
  }

  .filtros .contenedor {
    padding: 12px 16px;
    gap: 10px;
  }

  .buscador {
    flex-basis: 100%;
    height: 44px;
  }

  .buscador input {
    font-size: 16px;
  }

  .controles-filtro {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .select-wrapper select {
    width: 100%;
    max-width: none;
    height: 44px;
    padding-right: 34px;
    font-size: 14px;
  }

  .btn-limpiar {
    grid-column: 1 / -1;
    justify-content: center;
    height: 44px;
    font-size: 14px;
  }

  .resultados {
    padding-top: 16px;
    font-size: 13px;
  }

  .grilla {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 12px;
  }

  .tarjeta-cuerpo {
    padding: 10px 12px 12px;
    gap: 6px;
  }

  .etiqueta {
    font-size: 10.5px;
    padding: 2px 9px;
  }

  .tarjeta-titulo {
    font-size: 14px;
    min-height: 37px;
  }

  .precio {
    font-size: 17px;
  }

  .tarjeta-marcas {
    font-size: 12px;
  }

  .estado {
    padding: 48px 16px;
  }

  main.contenedor {
    padding-bottom: 32px;
  }

  /* Modal como hoja inferior (bottom sheet) */
  .modal {
    padding: 0;
    align-items: flex-end;
  }

  .modal-contenido {
    max-width: none;
    max-height: 92vh;
    border-radius: 18px 18px 0 0;
  }

  .modal-cuerpo {
    grid-template-columns: 1fr;
  }

  .modal-imagen {
    min-height: 220px;
    max-height: 42vh;
  }

  .modal-info {
    padding: 22px 18px 28px;
    gap: 10px;
  }

  .modal-info h2 {
    font-size: 21px;
    padding-right: 40px;
  }

  .modal-info .precio {
    font-size: 24px;
  }

  .modal-descripcion {
    font-size: 14px;
  }

  .marca-icono {
    width: 42px;
    height: 42px;
  }

  .marca-nombre {
    font-size: 22px;
  }

  .marca-lema {
    font-size: 12.5px;
  }

  .pie {
    padding: 24px 16px;
  }
}

@media (max-width: 400px) {
  .marca-nombre {
    font-size: 19px;
    letter-spacing: 0.5px;
  }

  .marca-lema {
    display: none;
  }

  .controles-filtro {
    grid-template-columns: 1fr;
  }

  .btn-limpiar {
    grid-column: auto;
  }

  .grilla {
    grid-template-columns: repeat(auto-fill, minmax(132px, 1fr));
    gap: 10px;
  }

  .tarjeta-titulo {
    font-size: 13px;
    min-height: 34px;
  }

  .precio {
    font-size: 16px;
  }

  .etiqueta {
    font-size: 10px;
  }

  .tarjeta-cuerpo {
    padding: 9px 10px 11px;
  }
}

@media (hover: none) {
  .tarjeta:hover {
    transform: none;
  }

  .tarjeta:hover .tarjeta-imagen img {
    transform: none;
  }

  .tarjeta {
    transition: transform 0.1s;
  }

  .tarjeta:active {
    transform: scale(0.98);
  }

  .btn-whatsapp:hover,
  .btn-whatsapp:active {
    transform: none;
    background: #25d366;
  }
}