/* ============================================
   Formula Store — Hoja de estilos principal
   Tema racing: rojo vivo + carbono + amarillo
   ============================================ */

:root {
  --rojo: #e10600;
  --rojo-oscuro: #b00500;
  --rojo-vivo: #ff2e1f;
  --amarillo: #ffd100;
  --negro: #0a0a0f;
  --carbon: #15151e;
  --carbon-claro: #1f1f2b;
  --gris-700: #3d3d4e;
  --gris-500: #6b6b7d;
  --gris-300: #d5d5de;
  --gris-100: #f4f4f8;
  --blanco: #ffffff;
  --sombra: 0 4px 16px rgba(10, 10, 15, 0.1);
  --sombra-hover: 0 14px 34px rgba(225, 6, 0, 0.22);
  --radio: 14px;
  --ancho-max: 1180px;
  --fuente-titulos: "Oswald", "Arial Narrow", sans-serif;
  --fuente-cuerpo: "Inter", "Segoe UI", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  font-family: var(--fuente-cuerpo);
  color: var(--carbon);
  background: var(--blanco);
  line-height: 1.65;
}

img {
  max-width: 100%;
  display: block;
}

h1, h2, h3, h4 {
  font-family: var(--fuente-titulos);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.contenedor {
  max-width: var(--ancho-max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Franja de velocidad reutilizable */
.franja {
  height: 6px;
  background: repeating-linear-gradient(
    -45deg,
    var(--rojo) 0 18px,
    var(--negro) 18px 36px,
    var(--amarillo) 36px 54px,
    var(--negro) 54px 72px
  );
}

/* ---------- Encabezado / Navegación ---------- */
.encabezado {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 3px solid var(--rojo);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--ancho-max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--blanco);
  text-decoration: none;
  font-family: var(--fuente-titulos);
  font-size: 1.5rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.logo span {
  color: var(--rojo-vivo);
}

.logo svg {
  width: 36px;
  height: 36px;
  fill: var(--rojo-vivo);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 1.7rem;
  align-items: center;
}

.nav-menu a {
  color: var(--gris-300);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.94rem;
  transition: color 0.2s;
  position: relative;
}

.nav-menu a:not(.btn-nav)::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  background: var(--rojo-vivo);
  transition: width 0.25s;
}

.nav-menu a:hover {
  color: var(--blanco);
}

.nav-menu a:not(.btn-nav):hover::after {
  width: 100%;
}

.nav-menu .btn-nav {
  background: var(--rojo);
  color: var(--blanco);
  padding: 0.6rem 1.4rem;
  border-radius: 8px;
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
  transition: background 0.2s;
}

.nav-menu .btn-nav:hover {
  background: var(--rojo-vivo);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.4rem;
}

.nav-toggle span {
  display: block;
  width: 26px;
  height: 3px;
  background: var(--blanco);
  margin: 5px 0;
  border-radius: 2px;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background:
    radial-gradient(ellipse at 75% 20%, rgba(225, 6, 0, 0.35), transparent 55%),
    radial-gradient(ellipse at 15% 85%, rgba(255, 209, 0, 0.12), transparent 45%),
    linear-gradient(160deg, var(--negro) 0%, var(--carbon) 60%, #23232f 100%);
  color: var(--blanco);
  padding: 6rem 0 7rem;
  overflow: hidden;
}

/* Líneas de velocidad decorativas */
.hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: -10%;
  width: 55%;
  height: 100%;
  background: repeating-linear-gradient(
    115deg,
    transparent 0 60px,
    rgba(255, 255, 255, 0.03) 60px 62px,
    transparent 62px 130px,
    rgba(225, 6, 0, 0.12) 130px 134px
  );
  pointer-events: none;
}

.hero-contenido {
  position: relative;
  max-width: 660px;
}

.hero .etiqueta {
  display: inline-block;
  background: rgba(255, 209, 0, 0.12);
  color: var(--amarillo);
  border: 1px solid var(--amarillo);
  padding: 0.35rem 1rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 1.3rem;
}

.hero h1 {
  font-size: clamp(2.3rem, 5.5vw, 4rem);
  font-weight: 700;
  line-height: 1.08;
  margin-bottom: 1.2rem;
}

.hero h1 span {
  color: var(--rojo-vivo);
  text-shadow: 0 0 30px rgba(225, 6, 0, 0.5);
}

.hero p {
  font-size: 1.18rem;
  color: var(--gris-300);
  margin-bottom: 2.2rem;
  max-width: 560px;
}

.hero-botones {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.95rem 2rem;
  border-radius: 8px;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s;
  cursor: pointer;
  border: none;
  font-family: var(--fuente-cuerpo);
}

.btn-primario {
  background: linear-gradient(135deg, var(--rojo-vivo), var(--rojo));
  color: var(--blanco);
  box-shadow: 0 6px 20px rgba(225, 6, 0, 0.4);
}

.btn-primario:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(225, 6, 0, 0.55);
}

.btn-amarillo {
  background: var(--amarillo);
  color: var(--negro);
  box-shadow: 0 6px 20px rgba(255, 209, 0, 0.35);
}

.btn-amarillo:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(255, 209, 0, 0.5);
}

.btn-secundario {
  background: transparent;
  color: var(--blanco);
  border: 2px solid var(--gris-500);
}

.btn-secundario:hover {
  border-color: var(--amarillo);
  color: var(--amarillo);
}

/* ---------- Barra de confianza ---------- */
.confianza {
  background: var(--carbon);
  padding: 1.5rem 0;
  border-top: 1px solid var(--gris-700);
}

.confianza .contenedor {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1rem;
}

.confianza-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 600;
  font-size: 0.94rem;
  color: var(--gris-300);
}

.confianza-item svg {
  width: 30px;
  height: 30px;
  fill: var(--amarillo);
  flex-shrink: 0;
}

/* ---------- Secciones genéricas ---------- */
.seccion {
  padding: 5rem 0;
}

.seccion-titulo {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3.2rem;
}

.seccion-titulo .sobretitulo {
  display: inline-block;
  color: var(--rojo);
  font-weight: 800;
  font-size: 0.85rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.seccion-titulo h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  color: var(--negro);
  margin-bottom: 0.6rem;
}

.seccion-titulo h2 span {
  color: var(--rojo);
}

.seccion-titulo p {
  color: var(--gris-500);
  font-size: 1.08rem;
}

.seccion-oscura .seccion-titulo h2 {
  color: var(--blanco);
}

.seccion-oscura .seccion-titulo p {
  color: var(--gris-300);
}

/* ---------- Productos ---------- */
.grid-productos {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(255px, 1fr));
  gap: 1.7rem;
}

.tarjeta {
  background: var(--blanco);
  border: 1px solid var(--gris-300);
  border-radius: var(--radio);
  overflow: hidden;
  box-shadow: var(--sombra);
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
  display: flex;
  flex-direction: column;
  position: relative;
}

.tarjeta::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--rojo), var(--amarillo));
  z-index: 1;
}

.tarjeta:hover {
  transform: translateY(-8px);
  box-shadow: var(--sombra-hover);
  border-color: var(--rojo);
}

.tarjeta-icono {
  background:
    radial-gradient(circle at 50% 120%, rgba(225, 6, 0, 0.45), transparent 65%),
    linear-gradient(135deg, var(--negro), var(--carbon-claro));
  padding: 2.4rem 0;
  display: flex;
  justify-content: center;
}

.tarjeta-icono svg {
  width: 74px;
  height: 74px;
  fill: var(--amarillo);
  filter: drop-shadow(0 4px 12px rgba(255, 209, 0, 0.3));
  transition: transform 0.3s;
}

.tarjeta:hover .tarjeta-icono svg {
  transform: scale(1.12) rotate(-4deg);
}

.tarjeta-cuerpo {
  padding: 1.5rem 1.4rem 1.7rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.tarjeta-cuerpo h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--negro);
}

.tarjeta-cuerpo p {
  color: var(--gris-500);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.tarjeta-cuerpo ul {
  list-style: none;
  margin-bottom: 1.3rem;
  flex: 1;
}

.tarjeta-cuerpo ul li {
  font-size: 0.9rem;
  color: var(--gris-700);
  padding-left: 1.5rem;
  position: relative;
  margin-bottom: 0.4rem;
}

.tarjeta-cuerpo ul li::before {
  content: "▸";
  color: var(--rojo);
  font-weight: 800;
  position: absolute;
  left: 0.2rem;
}

.tarjeta-cuerpo .btn {
  align-self: stretch;
  text-align: center;
  padding: 0.7rem 1.3rem;
  font-size: 0.92rem;
}

/* ---------- Cinta de estadísticas ---------- */
.estadisticas {
  background:
    radial-gradient(ellipse at 20% 0%, rgba(255, 209, 0, 0.15), transparent 50%),
    linear-gradient(120deg, var(--rojo-oscuro), var(--rojo) 55%, var(--rojo-vivo));
  color: var(--blanco);
  padding: 3.2rem 0;
}

.estadisticas .contenedor {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 2rem;
  text-align: center;
}

.stat h3 {
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1.1;
}

.stat p {
  font-size: 0.95rem;
  opacity: 0.92;
  font-weight: 600;
}

/* ---------- Testimonios ---------- */
.testimonios {
  background: var(--gris-100);
}

.grid-testimonios {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.6rem;
}

.testimonio {
  background: var(--blanco);
  border-radius: var(--radio);
  padding: 1.8rem;
  box-shadow: var(--sombra);
  border-left: 5px solid var(--rojo);
}

.testimonio .estrellas {
  color: var(--amarillo);
  font-size: 1.1rem;
  letter-spacing: 2px;
  margin-bottom: 0.7rem;
}

.testimonio blockquote {
  border: none;
  color: var(--gris-700);
  font-size: 0.98rem;
  font-style: italic;
  margin-bottom: 1rem;
}

.testimonio .autor {
  font-weight: 700;
  color: var(--negro);
  font-size: 0.92rem;
}

.testimonio .autor span {
  display: block;
  font-weight: 400;
  color: var(--gris-500);
  font-size: 0.85rem;
}

/* ---------- Métodos de pago ---------- */
.pagos {
  background:
    radial-gradient(ellipse at 85% 15%, rgba(225, 6, 0, 0.2), transparent 50%),
    linear-gradient(160deg, var(--negro), var(--carbon));
}

.grid-pagos {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.5rem;
}

.pago-item {
  background: var(--carbon-claro);
  border: 1px solid var(--gris-700);
  border-radius: var(--radio);
  padding: 1.9rem 1.5rem;
  text-align: center;
  transition: transform 0.2s, border-color 0.2s;
}

.pago-item:hover {
  transform: translateY(-5px);
  border-color: var(--amarillo);
}

.pago-item svg {
  width: 46px;
  height: 46px;
  fill: var(--amarillo);
  margin: 0 auto 0.9rem;
  display: block;
}

.pago-item h3 {
  font-size: 1.05rem;
  color: var(--blanco);
  margin-bottom: 0.45rem;
}

.pago-item p {
  font-size: 0.9rem;
  color: var(--gris-300);
}

.pagos-nota {
  text-align: center;
  margin-top: 2.2rem;
  color: var(--gris-300);
  font-size: 0.95rem;
}

/* ---------- Preguntas frecuentes ---------- */
.faq-lista {
  max-width: 780px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--gris-300);
  border-radius: 10px;
  margin-bottom: 0.9rem;
  overflow: hidden;
  background: var(--blanco);
}

.faq-item summary {
  cursor: pointer;
  padding: 1.1rem 1.3rem;
  font-weight: 700;
  color: var(--negro);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  transition: background 0.2s;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 1.5rem;
  color: var(--rojo);
  font-weight: 700;
  flex-shrink: 0;
  transition: transform 0.25s;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item[open] summary {
  background: var(--gris-100);
}

.faq-item .faq-respuesta {
  padding: 0 1.3rem 1.2rem;
  color: var(--gris-700);
  font-size: 0.96rem;
}

/* ---------- CTA final ---------- */
.cta-final {
  background:
    radial-gradient(ellipse at 50% 0%, rgba(255, 209, 0, 0.18), transparent 55%),
    linear-gradient(135deg, var(--rojo-oscuro), var(--rojo));
  color: var(--blanco);
  text-align: center;
  padding: 4.2rem 0;
}

.cta-final h2 {
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  margin-bottom: 0.8rem;
}

.cta-final p {
  font-size: 1.1rem;
  opacity: 0.94;
  margin-bottom: 1.8rem;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- Contacto ---------- */
.contacto-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
  align-items: start;
}

.contacto-info h3 {
  font-size: 1.35rem;
  color: var(--negro);
  margin-bottom: 1.1rem;
}

.contacto-dato {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  margin-bottom: 1.3rem;
}

.contacto-dato svg {
  width: 24px;
  height: 24px;
  fill: var(--rojo);
  flex-shrink: 0;
  margin-top: 3px;
}

.contacto-dato strong {
  display: block;
  color: var(--negro);
  font-size: 0.95rem;
}

.contacto-dato span,
.contacto-dato a {
  color: var(--gris-500);
  font-size: 0.95rem;
  text-decoration: none;
}

.contacto-dato a:hover {
  color: var(--rojo);
}

.formulario {
  background: var(--blanco);
  border-radius: var(--radio);
  padding: 2.1rem;
  box-shadow: 0 10px 34px rgba(10, 10, 15, 0.12);
  border-top: 5px solid var(--rojo);
}

.campo {
  margin-bottom: 1.1rem;
}

.campo label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
  color: var(--carbon);
}

.campo input,
.campo select,
.campo textarea {
  width: 100%;
  padding: 0.8rem 0.95rem;
  border: 1.5px solid var(--gris-300);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: inherit;
  background: var(--blanco);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.campo input:focus,
.campo select:focus,
.campo textarea:focus {
  outline: none;
  border-color: var(--rojo);
  box-shadow: 0 0 0 3px rgba(225, 6, 0, 0.14);
}

.campo textarea {
  resize: vertical;
  min-height: 120px;
}

.formulario .btn {
  width: 100%;
}

.mensaje-exito {
  padding: 0.95rem 1.1rem;
  border-radius: 8px;
  margin-bottom: 1.2rem;
  font-size: 0.95rem;
  font-weight: 600;
  background: #dcfce7;
  color: #166534;
  border: 1px solid #86efac;
}

/* ---------- Pie de página ---------- */
.pie {
  background: var(--negro);
  color: var(--gris-300);
  padding: 3.6rem 0 0;
}

.pie-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 2.5rem;
  padding-bottom: 2.5rem;
}

.pie h4 {
  color: var(--blanco);
  font-size: 1.05rem;
  margin-bottom: 1rem;
}

.pie p {
  font-size: 0.92rem;
}

.pie ul {
  list-style: none;
}

.pie ul li {
  margin-bottom: 0.55rem;
}

.pie a {
  color: var(--gris-300);
  text-decoration: none;
  font-size: 0.92rem;
  transition: color 0.2s;
}

.pie a:hover {
  color: var(--amarillo);
}

.pie-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--blanco);
  font-family: var(--fuente-titulos);
  font-size: 1.3rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 0.8rem;
}

.pie-logo span {
  color: var(--rojo-vivo);
}

.pie-logo svg {
  width: 28px;
  height: 28px;
  fill: var(--rojo-vivo);
}

.pie-inferior {
  border-top: 1px solid var(--gris-700);
  padding: 1.3rem 0;
  text-align: center;
  font-size: 0.85rem;
  color: var(--gris-500);
}

/* ---------- Botón flotante WhatsApp ---------- */
.whatsapp-flotante {
  position: fixed;
  bottom: 22px;
  right: 22px;
  z-index: 90;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: #25d366;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
  transition: transform 0.2s;
  animation: pulso 2.5s infinite;
}

@keyframes pulso {
  0%, 100% { box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35), 0 0 0 0 rgba(37, 211, 102, 0.5); }
  50% { box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35), 0 0 0 14px rgba(37, 211, 102, 0); }
}

.whatsapp-flotante:hover {
  transform: scale(1.1);
}

.whatsapp-flotante svg {
  width: 33px;
  height: 33px;
  fill: var(--blanco);
}

/* ---------- Animaciones de aparición ---------- */
.revelar {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.revelar.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .revelar {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .whatsapp-flotante {
    animation: none;
  }
}

/* ---------- Página de privacidad ---------- */
.pagina-legal {
  padding: 3.5rem 0 4.5rem;
  max-width: 820px;
  margin: 0 auto;
}

.pagina-legal h1 {
  font-size: 2.1rem;
  color: var(--negro);
  margin-bottom: 0.4rem;
}

.pagina-legal .fecha {
  color: var(--gris-500);
  font-size: 0.9rem;
  margin-bottom: 2.2rem;
}

.pagina-legal h2 {
  font-size: 1.25rem;
  color: var(--negro);
  margin: 2rem 0 0.7rem;
}

.pagina-legal p,
.pagina-legal li {
  color: var(--gris-700);
  font-size: 0.98rem;
  margin-bottom: 0.7rem;
}

.pagina-legal ul {
  padding-left: 1.4rem;
}

.pagina-legal a {
  color: var(--rojo);
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .contacto-grid {
    grid-template-columns: 1fr;
  }

  .pie-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: block;
  }

  .nav-menu {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--negro);
    flex-direction: column;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .nav-menu.abierto {
    max-height: 460px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.4);
  }

  .nav-menu li {
    width: 100%;
    text-align: center;
  }

  .nav-menu a {
    display: block;
    padding: 1rem 0;
    border-top: 1px solid var(--gris-700);
  }

  .nav-menu a:not(.btn-nav)::after {
    display: none;
  }

  .nav-menu .btn-nav {
    margin: 0.8rem auto 1.2rem;
    display: inline-block;
    padding: 0.65rem 1.7rem;
  }

  .hero {
    padding: 4rem 0 4.5rem;
  }

  .pie-grid {
    grid-template-columns: 1fr;
    gap: 1.8rem;
  }
}